检索结果-南通市图书馆

Journal of Pharmaceutical Analysis 2010年第3期22卷 183-187页

作者： Fei-Long Sun1,2,Min Jin3,Zhi-Gang Qiu3,Zhi-Qiang Shen3,Xin-Wei Wang3,Jun-Wen Li31.school of Life science and technology,Xi’an Jiaotong university,Xi’an 710049 2.school of Environmental and Chemical engineering,Xi’an Polytechnic university,Xi’an 710048 3.Institute of Environment and Health,Tianjin 300050,china school of Life science and technology Xi'an Jiaotong University Xi'an 710049 China school of Environmental and Chemical engineering Xi'an Polytechnic University Xi'an 710048 China Institute of Environment and Health Tianjin 300050 China

Objective To construct reference standards for detection and quantification of Klebsiella pneumoniae(***)with SYBR Green I-based real-time PCR *** Primers were designed based on the published sequence of the phoE gene of *** standard was prepared by cell culture,PCR and T-A clone methods,and was identified by colony PCR and DNA *** The standard curve showed a very good linear negative regression between threshold cycle(Ct)and Log starting quantity of copy *** detection range was from 5.2 to 5.2×106 copies per reaction,and the detection limit was 6 copies per *** coefficients of variance(CVs)of three parallel experiments were in the range of 0.05%-0.91%.Conclusion The reference standards have high stability and *** can be used in the quantitative detection of ***.

关键词： cloning vector Klebsiella pneumoniae real-time PCR standard

Keep Region for Constructing LOD of Terrain Regular Mesh

在线全文

学校读者我要写书评

暂无评论

Keep Region for Constructing LOD of Terrain Regular Mesh

The 12th International Multimedia Modelling Conference(MMM2006)

作者： Chen Guojun *+ Zhao Qinping * YinYuan * * school of Computer science and engineering BEIHANG university + College of Computer and Communication engineering china university of Petroleum

We present an improved ROAM algorithm for keeping region when rendering *** the region broken problem of ROAM algorithm in rendering terrain,a method of keeping region in rendering terrain with enhancing the triangle splitting condition is *** concept of optimum triangulation for region is used to set the splitting vertex and its parent *** rending algorithm sets status of the active vertex according to the view direction and the distance between viewpoint and region,and produces the terrain region’s level of *** results of experiments show that our algorithm with LOD has a satisfactory performance in keeping region during rending terrain.

关键词：

EXPERIMENTAL STUDY ON THE STEELS DIRECT ROLLING PROCESSING IN THE SEMI-SOLID STATE

在线全文

cnki会议

学校读者我要写书评

暂无评论

EXPERIMENTAL STUDY ON THE STEELS DIRECT ROLLING PROCESSING I...

第二届半固态金属加工技术研讨会

作者： KANG Yonglin, SONG Renbo, SUN Jianlin, ZHAO Aimin, WANG Jiwen, MAO Weimin school of Materials science and engineering, university of science and technology, Beijing 100083, china

In this paper, the study on the microstructure evolution of semi-solid spring steel (60Si2Mn) has been carried out with different solid fraction during direct rolling. The slurry was fabricated by electromagnetic stirring. The experimental device of direct rolling system was designed in person. The research results show that the growth manner of conventional dendrite arm has changed by stirring. The mechanism of semi-solid microstructure formation mainly includes that the dendrite arm melts off at its root and the dendrite arm bends under flow stresses. The manner of liquid and solid phases flowing and deforming during rolling was different with the solid fraction changing, which resulted in liquid and solid phases macrosegregation. With the solid fraction increasing, the phenomenon of segregation did not become obviously. When the solid fraction reached certain value, the primary solid phases generated plastic deformation. In addition, the tiny surface crack is unavoidable without further rolling for semi-solid slurry.

关键词： semi-solid rolling solid fraction microstructure macrosegregation property

Research on the magnetic material of Sm-Fe matrix nitrides

在线全文

cnki会议

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2005年第3期 1-7页

作者： CUI Chunxiang ˇˇ ,SUN Jibing,ZHANG Ying,WANG Ru,LI Lin and LIANG Zhimei (school of Material science and engineering,Hebei university of technology,Tianjin300130,china) school of Material science and engineering Hebei University of Technology Tianjin 300130 China

In this paper,the types of Sm-Fe matrix compounds and their correlations are introduced,and progress of research on the magnetic materials of Sm-Fe matrix nitrides is also *** research trends of future permanent magne... 详细信息

关键词： Sm-Fe matrix nitrides dual-phase nano-grain rare earth permanent magnetic materials.

Program Design Based on Parametric of 3D Tunnel for Mine Ventilation Network

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Program Design Based on Parametric of 3D Tunnel for Mine Ven...

2011 International Conference on Business Management and electronic Information(BMEI 2011)

作者： XiaoDong Wang Department of Civil and Environmental engineering university of science & technology Beijing Beijing 100083 P.R.china NaiLian Hu Department of Civil and Environmental engineering university of science & technology Beijing Beijing 100083 P.R.china

In view of the complicated solution of the mine ventilation system, a table needs to be prepared, which includes the branch numbers and node numbers, before calculation of the mine ventilation network. However, it is tedious and tricky to compile and input this data sheet without program design. To address this problem, there was a program design developed by using Visual C++ and the secondary development tool-3DMine software whose interface was the same as the platform. According to based data format of mine ventilation network solution software, through the program, the number of branches and nodes was decided in the three-dimensional network diagram of mine tunnels that has been built, and show in Excel. Instead of the manual compiling previous, this program realizes automatic extract process of basic data. Thus, it provides effective data information for the mine ventilation network solution.

关键词： secondary development branch number node number data extraction

Azimuthal anchoring of a nematic liquid crystal on a grooved interface with anisotropic polar anchoring

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第6期21卷 378-384页

作者：周璇张志东叶文江宣丽 State Key Laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences Graduate school of the Chinese Academy of sciences Department of Physics Hebei University of Technology

Zhang Y J et al.[Zhang Y J,Zhang Z D,Zhu L Z and Xuan L 2011 Liquid Cryst.38 355] investigated the effects of finite polar anchoring on the azimuthal anchoring energy at a grooved interface,in which polar anchoring was isotropic in the local tangent plane of the *** this paper,we investigate the effects of both isotropic and anisotropic polar anchoring on the surface anchoring energy in the frame of Fukuda et al.’s *** results show that anisotropic polar anchoring strengthens the azimuthal anchoring of grooved *** the one-elastic-constant approximation（K11 = K22 = K33 = K）,the surface-groove-induced azimuthal anchoring energy is entirely consistent with the result of Faetti,and it reduces to the original result of Berreman with an increase in polar ***,the contribution of the surface-like elastic term to the Rapini-Papoular anchoring energy is zero.

关键词： azimuthal anchoring energy surface grooves anchoring isotropy anchoring anisotropy

在线全文

学校读者我要写书评

暂无评论

基于本体的多Agent自动工艺系统

天津大学学报（自然科学与工程技术版） 2004年第3期37卷 253-257页

作者：李文杰冯志勇陈钢天津大学电子信息工程学院天津300072

为把本体理念应用于多Agent的CAPP自动工艺系统,提出了基于本体的多Agent自动CAPP系统模型,并构造了单个Agent的基本架构;建立了该领域的零件本体库和特征本体库,采用基于RDF(S)的OIL语言对系统中的各Agent零件特征知识的语法和语义进... 详细信息

为把本体理念应用于多Agent的CAPP自动工艺系统,提出了基于本体的多Agent自动CAPP系统模型,并构造了单个Agent的基本架构;建立了该领域的零件本体库和特征本体库,采用基于RDF(S)的OIL语言对系统中的各Agent零件特征知识的语法和语义进行详细的描述与注释,并利用一阶谓词逻辑对各Agent之间本体转换规则的语法和语义加以描述;最后通过实例验证了本体的功能和转换规则的智能推理机制,从而很好地满足多Agent自动工艺系统之间零件特征知识共享、复用和互操作的需求,同时对其它领域知识信息的处理也有着很好的借鉴意义.

关键词：多Agent 自动工艺系统零件特征 CAPP 本体交换语言一阶谓词逻辑智能推理机制

Petrology and tectonic significance of the early Mesozoic granulite xenoliths from the eastern Inner Mongolia, china

在线全文

学校读者我要写书评

暂无评论

science china Earth sciences 2011年第10期54卷 1484-1491页

作者： SHAO JiAn 1,2 & WEI ChunJing 1 1 The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education school of Earth and Space sciences, Peking university, Beijing 100871, china 2 Key Laboratory of Mineral Resources, Chinese Academy of sciences, Beijing 100029, china The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education school of Earth and Space sciences Peking University Beijing China Key Laboratory of Mineral Resources Chinese Academy of Sciences Beijing China

Granulite xenoliths are found in the early Mesozoic diorite intrusions from Chifeng and Ningcheng areas, eastern Inner Mongolia. The granulites are granoblastic and weakly gneissic with mineral assemblage of hypersthene, diopside, plagioclase and minor biotite, amphibole and ilmenite. Some samples contain the intergrowth composed of labradorite and vermicular hypersthene, and some coarse-grained plagioclases of andesine and labradorite composition occasionally develop bytownite rims with vermicular hypersthene, indicating a possible presence of garnet. Presence of blastogabbroic texture and hypersthene with diopside exsolution lamellae in some samples suggests that the protolith of the granulite is norite or gabbro. On the basis of metamorphic research and thermobaric calculation, the evolution of the granulite xenoliths is summarized into the following stages: (1) Isobaric cooling of underplated noritic or gabbroic magma in the lower crust led to the formation of probable garnet-bearing medium-high pressure granulite. (2) These higher pressure granulites were adiabatically uplifted to upper crust by dioritic magma and transformed to low pressure two-pyroxene granulite during an isothermal decompression. (3) The two-pyroxene granulite underwent retrograde metamorphism of different degrees during an isobaric cooling process as a result of crystallization and cooling of the dioritic magma. The pyroxenite-dominated cumulates and the medium-high pressure granulites may have rejuvenated the lower crust during the early Mesozoic.

关键词： early Mesozoic granulite xenolith lower crust North china Craton

A Neural Network Implementation for Binary Coded Gentic Algorithm

在线全文

学校读者我要写书评

暂无评论

A Neural Network Implementation for Binary Coded Gentic Algo...

第二十二届中国控制会议

作者： Gong Daoxiong Ruan Xiaogang electronic Information and Control engineering school Beijing university of technology Beijing 100022

＜正＞This paper proposes an ideal of implementing Genetic Algorithm （GA） with Neural Networks （NN）. The Multi-parent Recombination and Multi-gene Mutation operations are adopted and two artificial neuron models are proposed for these two genetic operations;the architecture of the whole system is also presented. We validate our scheme with some benchmark functions. The Significance of our research means that the GA can be implemented with hardware and the inherent parallelism of GA can be explicitly realized, as a result, the optimization computation speed of GA will be remarkably accelerated, and the application field of Genetic Algorithm will be widely broadened.

关键词： Genetic Algorithm Neural Network Optimization computation Inherent Parallelism.

Application of Rough Sets and Artificial Neural Network in Core Enterprise Performance Prediction

在线全文

cnki会议

学校读者我要写书评

暂无评论

Application of Rough Sets and Artificial Neural Network in C...

第二十七届中国控制会议

作者： Hu Jian 1,Shi Chengdong 1,2 1.school of Electric and electronic engineering,Shandong university of technology,Zibo 255049,P.R.china 2.school of Business Administration,Xi ’ an university of technology,Xi ’ an 710048,P.R.china

A predication model of core enterprise performance was proposed based on rough sets and artificial neural network from Knowledge Discovery and Data Mining perspective at ***,the calculation and analysis process of the model were given and *** performance decision-making table and discernable matrix were designed,and the artificial neural network and Back Propagation algorithm（BP network） were put ***,the model was applied into a practical prediction example *** the Balanced Scorecard Index System was reduced and the reduction index was input to the artificial neural network for intelligent training,the predicted sample was input to the trained network,the prediction value of the core enterprise performance was *** prediction result is consistent with the actual result.

关键词： Rough sets Artificial neural network Discernable matrix Core enterprise Performance prediction model