ClO+H、O(1D)+DCl-->ClO+D、O(1D)+HCl-->OH+Cl和N+NH-->N2+H，我们运用准经典轨线和量子力学两种方法进行了动力学的计算，对反应机制以及反应物极化在三原子反应动力学中的作用进行了研究。近三年来，我们在以下方面取得了进展：（1）通过设定反应物的转动量子数来实现反应物的极化，（2）对积分反应截面、广义的与极化相关的微分散射截面进行了计算，(3) 计算了与反应物极化相关的反应几率，(4) 对产物转动倾斜进行了研究。截止到目前，我们已经发表了3篇被SCI收录的论文。 [delivery_No] => A040303 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 反应物极化；量子力学方法；准经典轨线方法；； [abstract_cn] => 对于分子反应动力学的科学研究有两个持续的目标：一是理解反应机制，二是控制反应本身。目前，大部分研究都侧重于对于反应的理解和能量或者方向因素对于反应的影响。涉及控制分子反应的技术，尤其是对于特定产物的选择，相对而言，这方面的工作比较少。化学反应本质上是各向异性的，可以通过矢量性质表现出来。矢量性质中，最为大家熟悉的是产物的角分布，反应物和产物的转动角动量的空间分布（极化）也是很重要的；对于前者研究的较多，而对于后者的研究相对较少。从理论的角度来看，反应物的极化和产物的极化之间并没有重要的区别。然而，从实用的角度来看，两者是有区别的。反应物的极化由外部干预决定，而产物的极化由反应本身决定。对可操控的反应动力学的分析，能够为反应动力学提供重要的线索。我们计划采用量子力学和准经典轨线两种方法来研究反应物极化在三原子反应中的作用。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => The polarization of the reagent；Quantum mechanical approach；Quasi-classical trajectory method；； [awards_type] => 青年科学基金项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2013-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => There are two most persistent goals of scientific investigations of the dynamics of molecular reactions-understanding and control. Nowadays, most studies are strived for a detailed understanding of reaction mechanisms and of the role of energetic and directional factors. The attempt to devise techniques for the control of molecular reactions and particularly, for the selection of desired products is rather too limited. Chemical reactions are intrinsically anisotropic. The anisotropy can be revealed by vector properties. The best known of vector properties is the angular distribution of reaction products, which has been widely studied. The spatial distribtuion (polarization) of the rotational angular momenta of reagents and products is also important, and few researches are concerned with the aspect. There is no significant difference between reactants and products polarization from the theoretical point of view. However, there are differences from a practical point of view. The reagent polarization is determined by the external intervention, whereas the product polarization is determined by the reaction itself. The analysis of the dynamics of controlled reactions can provide important clues about the reaction dynamics. We plan to study the effect of reagent polarization on the triatomic reactions using both quan [document_No] => [institution_type] => [imf_5] => [attachment_text] => 青年科学基金项目 [top_article] => [student_No] => [page] => [title_cn] => 反应物极化在三原子反应动力学中的作用研究 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [葛美华]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 葛美华 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 25（万元） [positional_titles] => [doi] => 11204159 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=11204159 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 青年科学基金项目 [author_test] => Array ( [0] => Array ( [sure] => 0 [name] => 葛美华 [u_index] => 1 [irtag] => 7 [t_index] => 0 [person_id] => 20874 ) ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => 20874 [sys_author_id] => [id] => IKpk32YBFjIhTVEbV6Kr [tags] => 0 ) [13] => Array ( [grant_bulletin_date] => [abstract_meeting] => 水环境中的抗生素类污染物可以与水华蓝藻发生复杂的相互作用，导致复合污染数量和毒性不再是简单的叠加，有必要深入揭示复合污染变化规律。由于天然水环境中多种抗生素类污染物经常同时存在，本项目以混合抗生素为研究对象。选定两种典型抗生素类污染物阿莫西林和螺旋霉素为目标物质，选定水华蓝藻模式种铜绿微囊藻为目标藻种，研究混合抗生素与铜绿微囊藻之间的相互作用效应、机制以及联合毒性变化规律。采用毒性单位（TU）法评价混合抗生素对微囊藻的联合效应。当目标抗生素分别按照等毒性和等比例混合时，混合抗生素对微囊藻的半数效应浓度分别为1.25 TU和1.83TU，表明二者之间可能存在拮抗效应。当目标抗生素以毒性反比混合时，半数效应浓度为0.86TU，表明二者之间可能存在协同效应。进一步采用浓度加和模型(CA)和独立作用模型(IA)来模拟螺旋霉素和阿莫西林单一毒性的简单加和结果。将模拟数据与实际实验数据进行对比，对比结果证实等毒性配比的两种抗生素确实产生拮抗效应；以毒性反比混合的两种抗生素确实产生协同效应。等比例混合的两种抗生素，随着暴露浓度的增加，由协同效应逐渐转变为拮抗效应。选定与现有水环境中抗生素污染浓度相近的暴露浓度(800ng/L)进行后续试验，发现随着混合抗生素中螺旋霉素的比例上升，对藻细胞生长的效应由刺激逐步转变为抑制，复合污染物的生物毒性也由高于微囊藻单一污染变为低于微囊藻单一污染。混合抗生素在各比例下均刺激藻毒素的合成，而阿莫西林是刺激微囊藻生长和藻毒素合成的主因。叶绿素a、psbA、psaB和rbcL基因的表达量变化规律显示抗生素可能经由光合作用调控微囊藻的生长。此外，ntcA和mcyB基因在混合抗生素调控下的表达量与藻毒素合成量之间存在正相关关系。抗氧化系统的响应表明，螺旋霉素的高毒性可以导致过氧化氢在藻细胞内累积从而产生细胞氧化损伤，这可以解释随着螺旋霉素比例上升，混合抗生素对微囊藻混合效应的变化规律。蛋白质组学研究表明，混合抗生素可以直接调控微囊藻的光合作用、能量和物质代谢、藻毒素合成。从微囊藻蛋白质组中，共筛查出6个与其他差异蛋白交联程度最高、参与蛋白质相互作用最多的靶蛋白。项目研究发现，共存的低浓度抗生素污染物会刺激微囊藻爆发，需要加以控制，尤其是阿莫西林，应将其在混合抗生素中的比例控制在50%以下。研究结果可为水环境中抗生素和微囊藻复合污染控制策略制定提供依据。 [delivery_No] => E090301 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 阿莫西林；螺旋霉素；微囊藻毒素；比较蛋白质组学；实时定量PCR [abstract_cn] => 揭示复合污染机制并建立水体复合污染控制方法，对保障水质安全具有重要意义。本项目通过前期研究证实了单一的抗生素类污染物可与微囊藻发生相互作用。本项目选定两种典型抗生素类污染物阿莫西林和螺旋霉素，进一步研究二者共存时与铜绿微囊藻之间的相互作用，探究混合抗生素对微囊藻增殖和产毒性能的联合生物效应，以及微囊藻对混合抗生素的降解效应。通过测定多肽合成酶基因、抗氧化酶系和多种胞内生物分子对抗生素的响应，分析产生上述相互作用效应的细胞学和分子生物学机制。并基于藻细胞全蛋白质组分析技术，深入探索抗生素与微囊藻之间的作用途径，筛查抗生素对微囊藻的作用靶蛋白。最后选取对微囊藻毒素具有特异响应的"蛋白磷酸酶抑制法"评价抗生素对微囊藻毒素/微囊藻的生物毒性的影响效应。研究结果可以阐明水体中抗生素与微囊藻复合污染水平和联合毒性的变化规律，揭示抗生素与微囊藻的复合污染机制，为抗生素与微囊藻的复合污染治理提供理论依据。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => amoxicillin；spiramycin；microcystins；comparative；quantitative real time PCR [awards_type] => 青年科学基金项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2013-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => As an increasing concern for water quality assurance, combined pollution control depends on a comprehensive understanding of the interaction effects and mechanisms of combined pollutants. In a previous study of our laboratory, two typical antibiotic pollutants, amoxicillin and spiramycin, were found to interact separately with Microcystis aeruginosa. In the present study, the interaction effects between antibiotics and Microcystis aeruginosa were further investigated, including the combined effects of these two antibiotics on the growth and microcystin-production in Microcystis aeruginosa, as well as the simultaneous degradation of two antibiotics by Microcystis aeruginosa. The molecular and cellular mechanisms of the above interaction effects were then interpreted by examining the responses of microcystin synthetase gene B, antioxidant enzymes and other functional molecules in the algal cells under exposure to single and combined antibiotics. Further, the action pathways of single and combined antibiotics in Microcystis aeruginosa were explored on the protein level via comparative proteomic analysis between the antibiotic-exposed and unexposed algae, according to which the target proteins of antibiotics in the algae were screened. At last, the effects of single and combined antibiotics on the toxicity of microc [document_No] => [institution_type] => [imf_5] => [attachment_text] => 青年科学基金项目 [top_article] => [student_No] => [page] => [title_cn] => 水体中抗生素与铜绿微囊藻的复合污染机制和联合毒性研究 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [刘莹]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 刘莹 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 25（万元） [positional_titles] => [doi] => 51209125 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=51209125 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 青年科学基金项目 [author_test] => Array ( [0] => Array ( [sure] => 0 [name] => 刘莹 [u_index] => 1 [irtag] => 7 [t_index] => 0 [person_id] => 22523 ) ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => 22523 [sys_author_id] => [id] => oKpk32YBFjIhTVEbV6Gq [tags] => 0 ) [14] => Array ( [grant_bulletin_date] => [abstract_meeting] => Blazar天体是天文学家研究喷流、如何从中心超大质量黑洞提取能源的重要研究对象，光变是研究blazar天体的一种重要手段。本项目对典型的高峰频blazar天体(HBLs)和低峰频blazar天体(LBLs)的微光变占空比、光变时颜色的变化、光变对称性及光变周期进行了研究。通过多种检验方法研究发现HBL的微光变占空比要比LBL的低，HBL天体中可能有着比LBL天体更强的磁场，从而阻止或者延迟了喷流中密度不均匀和喷流弯曲的发生，这可能是HBL比LBL更少发生微光变的原因。LBL天体0716+714、BL Lacertae都表现出变亮时谱变蓝的性质，HBL天体Mrk 421表现出高态和低态颜色变化不一致的性质, 在目标处于低态时，有变亮变蓝的变化趋势，但高态时亮度变化时颜色基本不变，这种颜色变化的物理原因和差异需要进一步的深入研究。我们从大量文献、美国变星观测者协会(AAVSO) 数据库及网上公开的其它观测数据搜集了HBL天体Mrk 421、LBL天体BL Lacertae的长期光变数据，使用结构函数、Jurkevich方法、离散相关函数方法分别对光变曲线进行了光变周期分析。结果显示BL Lacertae在光学波段可能存在一个1.26年左右的周期，而射电波段可能存在一个7.50年左右的周期，结合光学和射电波段表现出的光变特性，我们认为在光学波段的周期以及在短期爆发中变亮变蓝的现象可能是由于螺旋形喷流中磁场重联产生的，而射电波段7.50年左右的周期是由于喷流进动的灯塔效应产生的，这也可以解释射电波段高频波段光变领先低频波段这一现象。Mrk 421存在一个约1.36年的光变周期，我们使用密近双黑洞模型对该周期进行了解释并估算了Mrk 421的中心黑洞质量。我们系统地对山东大学威海天文台一米望远镜的测光系统性能及台址条件进行了全面深入研究，给出了山东大学威海天文台的观测条件、CCD的性能指标、测光系统的极限星等、效率、测光精度等。该研究成果为blazar天体光变的观测研究中目标选择、观测策略制定方面提供了详细而重要的设备性能及技术指标参考。 [delivery_No] => A030203 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 光变；blazar天体；占空比；同步峰值频率； [abstract_cn] => Blazar天体是天文学家研究喷流、如何从中心超大质量黑洞提取能源的重要研究对象，光变是研究blazar天体的一种重要手段。本项目将选择一批包含高峰频blazar天体(HBLs)和低峰频blazar天体(LBLs)的研究样本，制定科学合理的观测策略，通过观测和搜集历史观测数据相结合的方式获取大量的光学观测数据，采用多种统计检验和周期分析的方法对光变曲线进行研究分析，对比研究HBLs和LBLs光变的占空比，通过分析得到的光变周期和光变时标估算blazar天体的中心黑洞质量，并对HBLs和LBLs的中心黑洞质量进行统计研究。仔细研究光变过程中同步峰值频率与峰值流量的相关性，应用相关分析的结果和其它各方面的光变信息来研究引起blazar天体光变的物理原因和物理机制。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => variability；blazar；duty cycle；synchrotron peak frequency； [awards_type] => 青年科学基金项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2013-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => Blazars are important objects to research the jet and the mechanism of energy extraction from the central supermassive black hole for astronomer. Variability is an important tool to understand blazar well. One sample including high-frequency-peaked blazars (HBLs) and low-frequency-peaked blazars (LBLs) will be chosen, and scientific and reasonable observation strategy will be established in this project. Plenty of optical data will be obtained by our own observations and collecting from the literatures. We will analyze the light curves by all kinds of statistic test methods and period analysis algorithms. The central black hole mass could be estimated by variability period or variability time scale. The duty cycle of variability and the central black hole mass will be researched statistically for HBLs and LBLs. We will make an intensive study on the correlation between the synchrotron peak frequency and corresponding peak flux. The physical causes and the mechanism of variability will be researched based on the correlation results and other available informations of variability study. [document_No] => [institution_type] => [imf_5] => [attachment_text] => 青年科学基金项目 [top_article] => [student_No] => [page] => [title_cn] => 低峰频与高峰频blazar天体光变的对比研究 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [胡绍明]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 胡绍明 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 32（万元） [positional_titles] => 副教授 [doi] => 11203016 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=11203016 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 青年科学基金项目 [author_test] => Array ( ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => [sys_author_id] => [id] => qKpk32YBFjIhTVEbV6Gq [tags] => 0 ) [15] => Array ( [grant_bulletin_date] => [abstract_meeting] => ABC2型无机光电功能晶体是一类应用广泛的功能材料，在太阳能电池、二极管、光电探测器以及非线性光学器件等方面均有重要应用。由于该类晶体具有组分多变、结构形式多样的特点，其宏观性能的表达往往是多种因素相互作用的结果。本项目采用第一性原理密度泛函方法，从电子态和声子态两个层面出发，探讨起关键作用的结构基团的原子电负性、化学成键、原子堆积和排布方式等，建立它们与电子结构和功能特性之间的联系，结合晶格动力学理论，对微结构及多形体的稳定性予以选择，从而寻求相应规律，并从理论上探索晶相可控合成的条件，对晶体设计和探索提供理论指导。 本项目取得的创新性研究成果和结论如下：（1）研究了原子种类、化学成键、原子堆积和排布方式对ABC2型功能晶体电子结构的影响规律。结果表明，阳离子种类对该类晶体电子结构起关键作用，阳离子通过与阴离子形成化学键的强弱、配位等影响原子轨道杂化，进而影响晶体的电子结构；原子堆积和排布方式也是通过化学成键的作用影响晶体配位结构及稳定晶型。（2）研究了声子间的非简谐作用以及与非谐作用密切相关的晶体热力学行为。结果表明，剪切模量通过改变格林耐森系数从而在ABC2型晶体材料热导率和热膨胀的各向异性产生过程中起重要作用，而化学键的共价性特征通过影响德拜温度对晶体热导率产生一定影响。（3）以LiInSe2晶体为代表研究了ABC2型功能晶体的高压相变机制，并在此基础上进行了新相的预测。分子动力学模拟发现，LiInSe2晶体存在两条相变路径，其对应的中间相只是阳离子排布不同，初始相向中间相转变的相变机制与G点光学软模的振动模式密切相关；理论预测，LiInSe2在30GPa压力下产生的动力学稳定的新晶相具有Pbcn空间群，在太阳能电池方面具有应用前景。（4）研究了LiInSe2晶体中的点缺陷结构和形式，及其对晶体线性和非线性光学响应的影响。结果表明，贫Li是LiInSe2晶体的主要生长气氛，在该生长气氛下生成第二相的几率大大降低，晶体缺陷以+2价的In取代Li缺陷（InLi2+）、-1价的Li空位缺陷（VLi-）、+3价的In间隙缺陷（Ini3+）以及InLi2++2VLi-缺陷团簇为主，晶体缺陷引起吸收光谱的红移和晶体颜色从黄色到红色的变化，并使得SHG信号强度增强0.2eV。 [delivery_No] => E0201 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 光电功能晶体；第一性原理；晶格热力学；相变；缺陷 [abstract_cn] => 本项目采用密度泛函第一性原理计算方法，分别从电子态和声子态两个层面出发，研究ABC2型光电功能晶体中关键作用基团的原子电负性、化学键型、配位结构等对其非线性光学系数、红外透波范围、双折射率以及光损伤阈值等光学参量的影响机制，总结组分、结构与电子态、声子态乃至宏观光电特性的本质联系，并通过晶格动力学方法研究关键作用基团内部以及之间的振动模式，探讨微结构和相结构的稳定性。在此基础上，设计1-2种光电性能优异的ABC2光电晶体，从理论上预测其功能特性以及生长所需热力学参数。在此基础上，与晶体生长密切配合，制备并测试其物理性能，并通过与理论计算结果的比较完善并修正理论模型，从而建立该类晶体设计和探索的新思路。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => Optic-electric functional crystal；first-principles；lattice thermodynamics；phase transition mechanism；point defect [awards_type] => 面上项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2012-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => [document_No] => [institution_type] => [imf_5] => [attachment_text] => 面上项目 [top_article] => [student_No] => [page] => [title_cn] => ABC2型光电功能材料的多层次研究及新材料探索 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [赵显]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 赵显 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 62（万元） [positional_titles] => 教授 [doi] => 51172127 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=51172127 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 面上项目 [author_test] => Array ( [0] => Array ( [sure] => 0 [name] => 赵显 [u_index] => 1 [irtag] => 7 [t_index] => 0 [person_id] => 25938 ) ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => 25938 [sys_author_id] => [id] => 2qpk32YBFjIhTVEbV6Gq [tags] => 0 ) [16] => Array ( [grant_bulletin_date] => [abstract_meeting] => KNN基陶瓷是一类很有潜在应用价值的无铅压电材料，但存在着压电活性偏低、性能稳定性欠佳的问题。本项目基于压电晶粒尺寸效应和电畴结构对压电性能及其稳定性的影响的探索思路，开展了KNN基陶瓷的组分、制备、微观结构和物理性质、物理现象和相关物理机制的研究。获得了关于电畴结构对压电活性、压电性能稳定性影响的规律性认识，得到了一些良好性能的KNN基无铅压电陶瓷材料。 研究发现，组分、结晶相和晶粒尺寸对极化KNN基陶瓷的电畴结构有着很大的影响。(1) KNLN组分陶瓷随Li含量变化而呈现不同特征的电畴结构。与四方相相比，正交相的电畴结构更稳定，压电性能的时间稳定性也更好。极化KNLN陶瓷和极化KNLNT陶瓷的对比研究发现，两者的电畴结构存在着显著的差别，含Ta的组分陶瓷的压电性能具有更好的热稳定性。(2) 小晶粒通常呈现一些互相平行的、条纹状的简单电畴图案，而大晶粒的电畴图案则可能比较复杂、会存在水痕状的180o电畴。小晶粒的KNN基陶瓷具有电畴结构稳定、抗老化性良好的特点。研究结果对于研制兼具优异压电性能的KNN基无铅压电陶瓷材料是一个重要线索。 考察了晶粒尺寸对KNN组分陶瓷、KNLN组分陶瓷的压电系数d33值的影响。KNN基陶瓷与BaTiO3陶瓷相比，压电晶粒尺寸效应较弱，d33值随晶粒尺寸的变化较小。热压烧结制备的小晶粒的KNLN组分陶瓷的正交-四方相变温度受退火处理条件的影响非常大。 发现了“Sb掺杂KNN基陶瓷的介电弛豫频率具有显著地低于未Sb掺杂的KNN基陶瓷的介电弛豫频率”的物理现象，并给出了合理的机制解释。 发展出了一种改进的两步烧结方法，可制备相对密度高于97.5%的致密KNN基陶瓷。以此得到了d33值达436 pC/N的KNLNTS组分陶瓷和d33值为353 pC/N、抗经时老化性优异的KNLNTS组分陶瓷。此外，还利用普通烧结方法制备了室温下呈现菱形相-四方相两相共存状态的0.9625KNLNTS-0.0375BNKZ组分陶瓷，其d33值高达460 pC/N。这些性能数据代表着目前国内外有关KNN基无铅压电陶瓷材料研究的前沿进展。 [delivery_No] => E020402 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 铌酸钾钠基无铅压电陶瓷；压电晶粒尺寸效应；电畴结构；强压电活性；性能稳定性 [abstract_cn] => 铌酸钾钠基陶瓷因其具有高的居里温度和较好的压电性能而近年倍受关注，但作为实用的高性能无铅压电材料，目前存在着压电活性偏低、温度稳定性较差等亟待解决的问题。本项目拟通过研究铌酸钾钠基陶瓷的压电晶粒尺寸效应与电畴结构对压电物性的调控规律和机制，确立同时实现强压电活性和良好温度稳定性的有效措施。将制备一系列组分、晶粒尺寸不同的高致密度陶瓷样品，认识压电性能随晶粒尺寸的变化规律；探讨晶相和微观组织对电畴结构的影响，研究电畴结构、介电性质和压电性能之间的关系，阐明电畴结构对压电性能的调控原理；通过提升正交/四方相变温度和拓宽两相共存温区，改善温度稳定性；进一步优化组分和工艺，最终研制出具有优异压电物性（压电活性指标d33高达600 pC/N、在-60oC至150oC范围性能稳定）的铌酸钾钠基陶瓷。项目实施将加深对铌酸钾钠基陶瓷的压电物性规律与机制的认识，获得低成本制备高性能无铅压电材料的工艺技术。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => KNN-based Lead-free Piezoelectric Ceramics；Piezoelectric Grain-Size Effect；Domain Structure；Strong Piezoelectric Activity；Performance Stability [awards_type] => 面上项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2012-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => [document_No] => [institution_type] => [imf_5] => [attachment_text] => 面上项目 [top_article] => [student_No] => [page] => [title_cn] => 铌酸钾钠基陶瓷的压电晶粒尺寸效应、电畴结构调控与优异压电物性的研究 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [张家良]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 张家良 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 60（万元） [positional_titles] => 教授 [doi] => 51172128 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=51172128 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 面上项目 [author_test] => Array ( [0] => Array ( [sure] => 0 [name] => 张家良 [u_index] => 1 [irtag] => 7 [t_index] => 0 [person_id] => 25444 ) ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => 25444 [sys_author_id] => [id] => 26pk32YBFjIhTVEbV6Gq [tags] => 0 ) [17] => Array ( [grant_bulletin_date] => [abstract_meeting] => 浮游植物损失量不仅是海洋生态系统状态的信息指示参数，也是海洋碳循环模型中的一个关键参数。同时在验证生态系统输出模型时，也需要考虑浮游植物损失量的时空变异。本项目以分析了南海北部藻种种群的分布特征，及其与海洋环境参数的相关关系；此外，实测和遥感数据相结合，借助模型反演了白令海混合层浮游植物生长量，在此基础上利用蒙特卡洛方法计算了混合层浮游植物总损失量的时空分异特征；结果发现：（1）各站点间的浮游植物细胞种类相差不大。而浮游植物细胞的密度存在明显的空间分布差异。各站点的甲藻的种类数和密度都明显低于硅藻。（2）各站点的温度与浮游植物细胞密度没有相关性，而盐度与浮游植物细胞总密度表现出较显著的负相关关系。各站位硅藻和浮游植物细胞总密度的变化规律与Chl-a 表现出一致的变化趋势，而甲藻密度则与 Chl-a浓度相关性不明显。（3）白令海混合层浮游植物日损失量在温暖年份（2000-2006年间）为 950 mg C /m？2 d？1，在寒冷年份（2007-2010年）为859 mg C m？2 d？1；在温暖和寒冷年份浮游植物损失量和初级生产力具有一致的季节变化规律和空间分布特征，且呼吸损失量在各分损失量中占的百分数最大；（4）利用小波分析法对海表温度和盐度进行分析，研究结果发现海表温度和海表盐度具有明显的年内变化周期，海表温度的年际变化周期为 4 年，海表盐度的年际变化周期为5-6年。 [delivery_No] => D0610 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 叶绿素剖面分布；种群结构；浮游植物总损失量；混合层；时空分异 [abstract_cn] => 浮游植物损失量不仅是海洋生态系统状态的信息指示参数，也是海洋碳循环模型中的一个关键参数。同时在验证生态系统输出模型时，也需要考虑浮游植物损失量的时空变异。南海因环境条件复杂，而导致混合层水体中营养盐和物理环境因子存在差异，因此浮游植物总损失量存在着显著的时空分异，直接影响到海洋碳循环模型的精确度。本项目拟以实测和遥感数据相结合，借助模型反演南海混合层浮游植物生长量，研究混合层浮游植物总损失量的时空分异特征，探讨浮游植物总损失量时空分异与海洋环境参数的关系。预期获得南海混合层浮游植物生长量的时空分异特征；揭示浮游植物总损失量的季节变化规律；阐明浮游植物总损失量的空间分布特征；确定影响混合层浮游植物总损失量时空分异的主要因子。本项目对理解南海浮游植物生物化学循环过程，构建合理的碳循环模型有重要意义，也可为海洋生态系统浮游植物碳循环的定量化研究提供科学依据。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => Chl-a Profile Distribution；Population Community；Phytoplankton Loss；Mixed Layer；Temporal and Spatial Variations [awards_type] => 青年科学基金项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2013-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => Total phytoplankton loss is an informative indicator of the ocean ecosystem status, and it is a key parameter in ocean carbon cycle models. Furthermore, to verify the output of ecosystem models, information is needed about the temporal ans spatial variation in total phytoplankton loss.Total phytoplankton loss exhibits significant temporal and spatial variations in the mixed layer due to the complex environment in South China Sea, which affects water column nutrient concentrations and physical forcings. Its temporal and spatial variations effect the accuracy of ocean carbon cycle models directly.The proposed study intends to model phytoplankton growth in the mixed layer of the South China Sea by using in situ data combined with remotely sensed data. Seasonal and spatial variations of total phytoplankton loss in the mixed layer will be studied and related to ocean environmental parameters. The expectations of the proposed study are to obtain information about seasonal and spatial variations in phytoplankton growth;to explain the pattern of seasonal variations in total phytoplankton loss in the mixed layer;to clarify the spatial distribution in total phytoplankton loss;to determine the main influencing factors of the seasonal and spatial variations in total phytoplankton loss from the mixed layer.The proposed study [document_No] => [institution_type] => [imf_5] => [attachment_text] => 青年科学基金项目 [top_article] => [student_No] => [page] => [title_cn] => 遥感估测南海混合层浮游植物总损失量季节变化和空间分布 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [刘春利]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 刘春利 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 27（万元） [positional_titles] => [doi] => 41206166 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=41206166 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 青年科学基金项目 [author_test] => Array ( ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => [sys_author_id] => [id] => ZKpk32YBFjIhTVEbXaOO [tags] => 0 ) [18] => Array ( [grant_bulletin_date] => [abstract_meeting] => 脑卒中是全世界发病率和死亡率极高的脑血管疾病，其中缺血性脑卒中约占80%。传统的溶栓治疗使缺血脑组织得到及时再灌注的同时，也能进一步加重其病理损害，造成缺血再灌注脑损伤。近年来，越来越多研究证明固有免疫介导的炎症反应与脑缺血之间存在密切联系。位于胞浆内的模式识别受体核苷酸结合寡聚化结构域(nucleotide-binding oligomerization domain 2，NOD2)是固有免疫领域的重要分子和研究热点，其在缺血再灌注脑损伤中的作用及机制尚未阐明。本项目利用小鼠大脑中动脉线栓法建立的脑缺血模型再灌注损伤模型，发现脑缺血再灌注损伤后NOD2的表达明显上调并且在小胶质细胞及星形胶质细胞中有大量表达。脑室内注射NOD2激动剂MDP加重了缺血再灌注脑损伤。而NOD2敲基因鼠较野生型小鼠在缺血再灌注损伤后梗死体积明显缩小，神经功能学评分明显改善；同时明显抑制了缺血再灌注损伤诱导的NF-κB, p38MAPK和JNK的活化； IL-1β、IL-8、IL-6、TNFа等炎症因子的产生以及NADPH氧化酶2型（NOX2）表达和氧自由基的产生。此外体外抑制NOX2活性可以明显降低小胶质细胞NOD2活化诱导的IL-6表达。以上结果提示脑缺血再灌注后上调的NOD2活化后激活NOX2，产生的ROS，从而启动转录因子NF-κB的活化，进一步诱导免疫炎症反应，参与缺血再灌注脑损伤。本课题首次揭示NOD2 /NOX2信号通路在脑缺血再灌注损伤的作用及机制，为疾病的防治提供了新的策略。 [delivery_No] => H0906 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 脑缺血再灌注损伤；核苷酸结合寡聚化结构域2；固有免疫；NADPH氧化酶；炎症 [abstract_cn] => 固有免疫介导的炎症反应在缺血性脑血管疾病病理生理机制中的作用日益引起人们的重视，NOD2是新近发现的胞内模式识别受体，其介导的免疫炎症反应在机体防御和炎症性疾病中发挥着关键作用，迄今尚无NOD2在脑缺血再灌注损伤中的明确作用及机制的研究。我们前期研究证实脑缺血再灌注后缺血区NOD2表达显著升高，而且NOD2敲基因鼠在缺血再灌注损伤后梗死体积明显小于野生型小鼠，提示其在脑缺血再灌注损伤中可能发挥了重要作用。此外，我们还发现抑制NADPH氧化酶（NOX2）可以明显抑制小胶质细胞糖氧剥夺诱导的NOD2表达及NF-κB活化。本课题拟采用小鼠的大脑和小胶质细胞的缺血再灌注损伤模型，体内外分别应用基因敲除和沉默技术，深入探讨NOD2引起脑缺血再灌注损伤的机制及其和NOX2/NF-κB信号通路的关系。本课题将首次揭示NOD2信号通路在缺血再灌注损伤的作用及机制，并为疾病的防治提供新的策略。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => cerebral ischemia-reperfusion；nucleotide-binding oligomerization domain (NOD)2；innate immunity；NADPH oxidase；inflammation [awards_type] => 青年科学基金项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2013-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => The innate immune response is involved in the pathophysiology of cerebral ischemia-reperfusion (I/R) injury. NOD2 (nucleotide-binding oligomerization domain protein 2) is one of the pattern recognition receptors involved in innate immune response and is genetically associated with several inflammatory diseases. Our recent studies demonstrated that the expression of NOD2 in both mRNA and protein levels was significantly increased in the ischemic penumbra of mice subjected to 2 h middle cerebral artery occlusion (MCAO) and 24 h reperfusion; moreover, compared with wild type mice, NOD2-deficient mice had lower infarct volumes. However, the NOD2-dependent signalling pathway after cerebral I/R is far from being fully characterized. NOD2 cause inflammation via activation of nuclear factor-kappa B (NF-κB) which is a central regulator of inflammatory response. NADPH oxidase type 2 (NOX2) is well-known as a major source for superoxide radical generation, which play a significant role in brain I/R injury and is associated with inflammation by activated NF-κB. Our preliminary data also showed that NOD2 and NF-κB P65 subunit were up regulated in the microglia cells with oxygen-glucose deprivation (OGD), Apocynin could effectively down regulate NOD2 expression and NF-κB activation by inhibiting NOX. Taken together, our data [document_No] => [institution_type] => [imf_5] => [attachment_text] => 青年科学基金项目 [top_article] => [student_No] => [page] => [title_cn] => NADPH氧化酶在NOD2介导的脑缺血再灌注损伤中的作用及机制 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [刘慧青]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 刘慧青 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 23（万元） [positional_titles] => [doi] => 81200904 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=81200904 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 青年科学基金项目 [author_test] => Array ( [0] => Array ( [sure] => 0 [name] => 刘慧青 [u_index] => 1 [irtag] => 7 [t_index] => 0 [person_id] => 22277 ) ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => 22277 [sys_author_id] => [id] => Zapk32YBFjIhTVEbXaOO [tags] => 0 ) [19] => Array ( [grant_bulletin_date] => [abstract_meeting] => 嵌入式网络作为传统互联网的延伸，是物联网的重要组成部分。根据具体应用的特定，嵌入式网络的设计往往需要兼顾可信性、实时性、低功耗等非功能性需求。本项目以物联网相关应用为背景，从网络系统架构、安全机制及路由协议等方面入手，对嵌入式网络系统（包括网关与网络节点的通信与计算任务）的可信性、实时性以及功耗进行综合的建模、设计与分析。本项目针对嵌入式无线网络系统的可信性、实时性、能耗以及三者之间的相互影响与关联，对嵌入式专用处理器、层次存储系统、以及网络路由协议等各个体系结构层面的设计与分析方法进行了系统的研究。 面向常用加密系统如RSA及ECC，通过设计专用指令集处理器，提升了加密系统的执行时间可预测性。针对嵌入式网关和网络节点中日益复杂的计算任务，提出了基于软件可控的便笺式存储器和传统高速缓存的混合片上缓存系统的管理策略，在保障系统实时性的前提下，有效降低了系统能耗。最后，通过在网络路由协议中引入轻量级信任管理模型，综合分析了路由策略对网络传输的可靠性、时延、以及节点能耗的影响。针对面向工业自动化的实时网状网络WirelessHART协议，提出了一种可靠、实时以及低功耗的路由评估模型与调度策略。 [delivery_No] => F020308 [producer] => [ei_No] => [discipline_name] => [isbn] => [main_cword] => 嵌入式系统；实时系统；专用指令集处理器；存储系统；路由协议 [abstract_cn] => 嵌入式网络作为传统互联网的延伸，是物联网传输层的重要组成部分。可信性与实时性作为嵌入式网络系统的核心设计需求，近年来成为学术界与工业界关注的热点。然而，当前面向网络的可信性与实时性的研究往往相对独立，缺乏对两者统一建模、设计及分析的理论依据。本项目将从网络系统架构、安全机制及路由协议等方面入手，对嵌入式网络的可信性与实时性之间的关系进行量化研究。首先，对可信计算平台与可信网络系统进行面向具体应用的实时性分析。在此基础上，设计融合信任预测管理模型与实时性分析的网络路由协议，同时保障网络通信的可信性与实时性需求。最终，实现路由协议、可信架构与实时性分析间的自适应反馈机制，指导对系统性能、能耗、安全强度等方面的优化与配置。本项目基于理论研究、仿真测试以及原型系统验证，将提出一套面向可信、实时嵌入式网络的建模、设计及分析的完整的系统解决方案，为推动物联网的发展与应用提供理论依据与技术支持。 [keyword_plu] => [book_alias] => [controlled_terms] => [complete_time] => 2015-12-31 [imf] => [publisher_city] => [uncontrolled_terms] => [conference_ad] => [subsection] => [cite_awos] => [imf_once] => [classification_pub] => [publication_iso ] => [oral_time] => [main_eword] => Embedded systems；Real-time systems；ASIP；Memory system；Routing protocol [awards_type] => 青年科学基金项目 [bulletin_No] => [publication_29] => [pub_year] => 2015 [eissn] => [dom_ranking] => [application_date] => 2013-01-01 [from_id] => 86 [profession_stu] => [cauthor_ad] => [cscd_No] => [abstract_en] => As extensions of the traditional Internet, embedded networks become an important communication layer component of the Internet of Things (IoTs). Trust and real-time both serve as the key design requirements of an embedded network, which attract huge attention from research and industry communities recently. However, there are few joint studies of these two topics, resulted in lack of unified modeling, analysis and design methodologies to achieve both targets simultaneously. In this project, we will do a quantitative study of the relationship between trust and real-time, from aspects of the network architecture, the security mechanism, and the routing protocol. We will propose application-specific real-time analysis techniques for the trusted computing platform and trusted network. By combining the trust prediction and management model and real-time analysis, we will design new routing protocols, which achieve both trust and real-time in the network communication. Based on the above-mentioned work, we will propose a feedback strategy among routing protocol, trusted architecture, and real-time analysis, which guides the optimization on the system performance, energy consumption, and security level. Based on the theoretic study, simulation and prototype verification, this project will eventually lead to a comprehen [document_No] => [institution_type] => [imf_5] => [attachment_text] => 青年科学基金项目 [top_article] => [student_No] => [page] => [title_cn] => 面向嵌入式可信网络的实时性分析研究 [article_dt] => [name_editor] => [reference] => [series] => [fund_type] => 国家自然基金 [create_time] => [research_area] => [sponsor] => [awards_title ] => [publication_type] => [fund_No] => [highly_article] => [cssci_No] => [cite_wos] => [author_jg] => [鞠雷]山东大学 [issue] => [email] => [datebase] => [degree] => [name_tutor1] => [cauthor_back] => [begin_page] => [publisher] => [language] => [author_fn] => [country] => [pubmedID] => [author_in] => [check_3Y] => [subject_gb1] => [jcr_wos] => [wos_No] => [standard_in] => [cauthor] => [author_gro] => [scopus_No] => [bulletin_date] => [author_en] => [job_no] => [volume_label] => [clc] => [abstract_type] => [fund_CSSCI] => [conference] => [keyword_cn] => [article_id] => [suppl] => [editor] => [thesis_au] => [conference_pro] => [email_c] => [author_first] => [conference_spo] => [volume] => [phone] => [publisher_ad] => [check_180] => [end_page] => [author_cn] => 鞠雷 [researcherID] => [fund_ab] => [department_tutor1] => [reference_No] => [publication_cn] => [cite_scopus] => [special_is] => [student_type] => [institution_first] => [tag] => 20 [publication_en] => [conference_data] => [legal_status] => [open_time] => [agency] => [isbn_10] => [hx_id] => 2368 [province] => [numerical_index] => [meet_code] => [school_stu] => [title_en] => [wos_sub] => [source_type] => 357 [birthday] => [keyword_en] => [pub_date] => [pages] => [fund_amount] => 23（万元） [positional_titles] => [doi] => 61202015 [classification_No] => [issn] => [institution_name] => [uri] => http://npd.nsfc.gov.cn/projectDetail.action?pid=61202015 [responsibility] => [orcID] => [grant_bulletin_No] => [jl_awards_type] => 青年科学基金项目 [author_test] => Array ( [0] => Array ( [sure] => 0 [name] => 鞠雷 [u_index] => 1 [irtag] => 7 [t_index] => 0 [person_id] => 21515 ) ) [sys_author_id_arr] => [batch2] => 5 [sys_jg_type] => 9 [batch] => 0 [hb_type] => 1 [company_id] => 0,0,0,0,0,0,0 [author_id] => 21515 [sys_author_id] => [id] => b6pk32YBFjIhTVEbXaOO [tags] => 0 ) ) 1-->