检索结果-南通市图书馆

Design and implementation of an optical simulation environment for bioluminescent tomography studies

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2007年第1期17卷 87-94页

作者： LI Hui, TIAN Jie, LUO Jie, LU Yujie, CONG Wenxiang and WANG Ge ( Department of Education Technology, capital normal university, Beijing 100037, China Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China Bioluminescent Tomography Laboratory, Department of Radiology & Department of Biomedical Engineering, university of Iowa, Iowa City, Iowa 52242, USA) [a]Departhent of Education Technology Capital Normal University Beijing China [b]Key Laboratoiy of Omplex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing China [c]Bioluminescent Tomography Laboratoiy Department of Radiology & Department of Biomedical Engineering University of Iowa Iowa City tIowa USA

As a challenging task for bioluminescent tomography simulation, a virtual optical environment is needed to solve the forward problem accurately, that is, to achieve a high precision for bioluminescent signal synthesis on the external body surface of a small animal. The molecular optical simulation environment named MOSE is implemented using the C++ programming language and the OpenGL techniques, including a user-friendly interface with interactive tools facilitating users' operations. The accuracy of the virtual optical environment is verified by error analysis of mesh simplification and comparison between MOSE results and experimental data. This virtual optical environment is accurate, flexible and efficient to simulate the photon propagation in complicated tissues, which has a great potential to become a software platform for bioluminescent tomography studies and other molecular imaging applications.

关键词： molecular imaging biolumlnescent tomography photon propagation Monte Carlo method.

SERS on thin film composed of gold nanoparticles

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

SERS on thin film composed of gold nanoparticles

Facile Synthesis of Ultrathin ZnS Nanowires Via a Solvothermal Route

第十六届全国光散射学术会议

作者： Longkun Yang,Peijie Wang~* (Department of physics,capital normal university,Beijing,100048)

＜正＞The thin film composed of gold nanoparticles was synthesized in a high yield by combining Au-surface seeding and film growing *** the analysis in this abstract,it indicates that the film system is necessary and effective to the study of SERS mechanism、application and surface plasmonics（SPs）,a rising area in nanophotonics. Since its initial discovery,SERS has exhibited extraordinary potential for the characterization of trace

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Facile Synthesis of Ultrathin ZnS Nanowires Via a Solvotherm...

中国化学会第六届全国结构化学学术会议

作者： Yang Tian~*,Jing Zhang Department of Chemistry,capital normal university,Beijing,100048

＜正＞ZnS nanowires were prepared through a facile solvothermal synthesis route with the presence of octylamine and *** transmission electronic micrograph（TEM） image shows that the obtained ultrathin ZnS nanowires are uniform in the diameter of ca.1.5nm with the length of several hundred *** power X-ray diffraction（XRD） pattern indicates that the ZnS nanowries are in a

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

从心理学角度看达·芬奇绘画作品风格

首都师范大学学报（社会科学版） 2009年第S1期 197-203页

作者：黄硕首都师范大学历史学院

达·芬奇是世界历史上最著名的艺术家之一。其留存于世的作品却并不多,很多作品的题材至今仍是不解之谜。本文将试图通过心理学的角度浅析达·芬奇的童年成长经历使其产生的同性性取向及恋母情结,希望借此进一步的了解达.芬奇艺术创作的... 详细信息

达·芬奇是世界历史上最著名的艺术家之一。其留存于世的作品却并不多,很多作品的题材至今仍是不解之谜。本文将试图通过心理学的角度浅析达·芬奇的童年成长经历使其产生的同性性取向及恋母情结,希望借此进一步的了解达.芬奇艺术创作的"神秘"之处。

关键词：达·芬奇成长经历性取向恋母情结

Quantitative exploration of the mechanisms behind the urban thermal environment in Beijing

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2009年第12期19卷 1757-1763页

作者： Dan Meng,Xiaojuan Li~*,Wenji Zhao,Huili Gong Key Laboratory of 3D Information Acquisition and Application,Ministry of Education,Key Laboratory of Resource,Environment and GIS in Beijing,College of Resources Environment and Tourism,capital normal university,Beijing 100048,China [a]Key Laboratory of 3D Information Acquisition and Application Ministry of Education Key Laboratory of Resource Environment and GIS in Beijing College of Resources Environment and Tourism Capital Normal University Beijing 100048 China

The driving mechanism behind the formation of urban thermal environments is the result of a combination of *** was chosen as the study area,and the technique of principal component analysis(PCA) was used.A spatial regression method was also applied for quantitative explanation of the thermal *** Landsat thematic mapper images were used to quantify potential causing *** the eigenvalues of each factor and its relationship with land surface temperature,the first three principal components(PCs) are regarded as the main causative factors explaining the mechanism as independent *** first three PCs mainly reflect urban construction,road density and the normalized difference vegetation index(NDVI),*** least squares,spatial lag and spatial error regression models were established separately for the relationships between the first three PCs and land surface temperature(LST).In the two spatial regression models,z-statistics for both the spatial lag parameter(ρ) and spatial residual parameter(λ) are significant,indicating the necessity of using spatial regression to replace the OLS regression model,as well as indicating that the spatial error regression model is superior to the spatial lag regression ***,the normalized difference built-up index(NDBI) and road density are the most significant positive contributions to LST.

关键词： Urban thermal environment Drive mechanism Spatial regression Beijing

Quantum-Chemical Insights into the Impact of the CycloHexyl on the Mobility of Naphalene Diimide Semiconductors

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Quantum-Chemical Insights into the Impact of the CycloHexyl ...

Synthesis　and　Crystal　Structure　of［Na（DB18C6）（H_2O）_2］_2Mo_6O_（19）·3DMF·2CH_3OH

中国化学会第28届学术年会

作者： Haijiao Li and Yi Liao Department of Chemistry,capital normal university,Beijing 100048

＜正＞Quantum-chemical caculations coupled with band model are used to study the charge carrier mobilities in a series of N,N’-bis（substituent）naphalene diimide（NDI）*** gain a better understanding of the role of the substituent of cyclohexyl,which brings with a considerable mobility near 6 cm2/（Vs）,the computational results for NDI-CycloHexyl and NDI-Hexyl are compared using density functional theory,and the relationship between

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1996年第4期15卷 293-296页

作者： Lu Xiao-Ming Zhao Ya-Ping Qu Er-Ling Xiao Ling-Mei Liu Shun-Cheng(Department of Chemistry, capital normal university, Beijing, 100037)Jin Xiang-Lin(Institute of Physical Chemistry, Beijing Uniuersity, Beijing, 100871) Department of Chemistry Capital Normal University Beijing 100037 Institute of Physical Chemistry Beijing University Beijing 100871

The title complex [Na (DB_18C_6) (H_2O)_2]_2Mo_6O_19·3DMF · 2CH_3OH (Ⅰ) , a new type of crown hexamolybdate supermolecule, has been synthesized. Its crystal structure has been determined by X-ray diffraction analysis. The crystal C_49H_32 Mo_6N_2Na_2O_40 is tetragonal, space group P4/mbm, a= 17.108(2), c= 28. 285 (6) A ,V=8279(2) A￣ 3, Z=4 , M_r= 1960. 8 , D_x=1. 573 g/cm￣3 , P=9. 51cm￣(-1). F(000)=3936. The final agreement factors R=0. 058 and R_w= 0. 062 for 1777 independent reflections with F>4σ(F). In contrast to what we have reported about [Na(DB_18C_6)(CH_3OH)]_2Mo_6O_19(Ⅱ) where the whole complex was linked together, the cation [Na (DB_18C_6 ) (H_2O)_2]￣ + , that has crystallographic D_2h symmetry, combines with the anion with the symmetry O_h by electronic interaction.

关键词： hexamolybdate anion crown ether complex crystal structure

在线全文

学校读者我要写书评

暂无评论

氟监测植物筛选的主成分分析方法

生态学杂志 1995年第3期14卷 71-73页

作者：马恩林首都师范大学

氟监测植物筛选的主成分分析方法马恩林（首都师范大学，北京１０００５３）ＵｓｅｏｆＰｒｉｎｃｉｐａｌＣｏｍｐｏｎｅｎｔＡｎａｌｙｓｉｓｉｎＳｅｌｅｃｔｉｎｇＭｏｎｉｔｏｒｉｎｇＰｌａｎｔｓｆｏｒＦｌｕｏｒｉｄｅ￥ＭａＥ... 详细信息

氟监测植物筛选的主成分分析方法马恩林（首都师范大学，北京１０００５３）ＵｓｅｏｆＰｒｉｎｃｉｐａｌＣｏｍｐｏｎｅｎｔＡｎａｌｙｓｉｓｉｎＳｅｌｅｃｔｉｎｇＭｏｎｉｔｏｒｉｎｇＰｌａｎｔｓｆｏｒＦｌｕｏｒｉｄｅ￥ＭａＥｎｌｉｎ（ＣａｐｉｔａｌＮｏｒｍａ...

关键词：主成分分析环境监测氟监测植物监测指数

收入风险、教育水平与职业选择——基于北京市部分用人单位职工的调研

在线全文

学校读者我要写书评

暂无评论

教育发展研究 2011年第17期31卷 6-9,14页

作者：廖娟首都师范大学管理学院北京大学教育经济研究所博士后北京100871

本文采用北京市的调查数据研究国有部门和私人企业职工的收入风险、教育水平与其职业选择之间的关系。结果表明:未接受高等教育的个体比接受过高等教育的个体有更大的收入风险;越愿意冒风险的个体,越不会选择去国有部门工作,这反映了风... 详细信息

本文采用北京市的调查数据研究国有部门和私人企业职工的收入风险、教育水平与其职业选择之间的关系。结果表明:未接受高等教育的个体比接受过高等教育的个体有更大的收入风险;越愿意冒风险的个体,越不会选择去国有部门工作,这反映了风险态度会影响个人的职业选择;收入、工作压力和社会地位是个人选择去国有部门工作的三个主要因素。据此,文章提出了完善劳动力市场工资制度促进大学毕业生就业的建议。

关键词：教育水平职业选择风险补偿