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Design of Diffractive Optical Elements for Implementing Optical Interconnects and Beam Splitting

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Chinese Physics Letters 1995年第8期12卷 457-460页

作者： CHEN Yansong li dehua Institute of Physics Academia SinicaBeijing 100080

A design approach for optical interconnect system and beam splitting composed of a phase-only diffractive optical element is *** diffractive optical element is of 16 phase levels,so its efficiency may reach very *** examples of interconnect and beam splitting patterns are carried out with this design approach and the satisfactory results are given.

关键词： splitting element beam

The Exact Inference of Beta Process and Beta Bernoulli Process From Finite Observations

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Computer Modeling in Engineering & Sciences 2019年第10期121卷 49-82页

作者： Yang Cheng dehua li Wenbin Jiang School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan430074China School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan430074China.

Beta Process is a typical nonparametric Bayesian *** the Beta Bernoulli Process provides a Bayesian nonparametric prior for models involving collections of binary valued *** previous studies considered the Beta Process inference problem by giving the Stick-Breaking sampling *** paper focuses on analyzing the form of precise probability distribution based on a Stick-Breaking approach,that is,the joint probability distribution is derived from any finite number of observable samples:It not only determines the probability distribution function of the Beta Process with finite observation(represented as a group of number between[0,1]),but also gives the distribution function of the Beta Bernoulli Process with the same finite dimension(represented as a matrix with element value of 0 or,1)by using this distribution as a prior.

关键词： Beta process joint distribution beta Bernoulli process exact inference

PERFORMING A 2-DIMENSIONAL liNEAR TRANSFORM WITH A HOLOGRAPHIC MASK

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Chinese Physics Letters 1990年第10期7卷 437-440页

作者： CHEN Yansong ZHENG Shihai li dehua YANG Guozhen Institute of Physics Academia SinicaBeijing 100080

Based on the configuration of coherent optical system composed of a holographic mask and two Fourier transform lenses,an approach of performing a 2-dimensional(2-D)linear transform is *** 2-D Walsh-Hadamard transform ... 详细信息

关键词： holographic Hadamard Walsh

Human amnion tissue injected with human umbilical cord mesenchymal stem cells repairs damaged sciatic nerves in rats

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Neural Regeneration Research 2012年第23期7卷 1771-1778页

作者： dehua li Changhui Wang Wei Shan Ruixia Zeng Yan Fang Pan Wang Department of Anatomy Liaoning Medical UniversityJinzhou 121001Liaoning ProvinceChina Department of Neurology Fushun Second HospitalFushun 113001Liaoning ProvinceChina

Human umbilical cord mesenchymal stem cells,incorporated into an amnion carrier tubes,were assessed for nerve regeneration potential in a rat nerve defect *** nerves were exposed to human amnion carriers containing either human umbilical cord mesenchymal stem cell （cell transplantation group）or saline（control group）.At 8,12,16 and 20 weeks after cell implantation,the sciatic functional index was higher in the cell transplantation group compared with the control ***,electrophysiological examination showed that threshold stimulus and maximum stimulus intensity gradually decreased while compound action potential amplitude gradually ***-eosin staining showed that regenerating nerve fibers were arranged in nerve tracts in the cell transplantation group and connective tissue between nerve tracts and amnion tissue reduced over *** muscle cell diameter,wet weight and restoration ratio were *** data indicate that transplanted human umbilical cord mesenchymal stem cells,using the amnion tube connection method,promote restoration of damaged sciatic nerves in rats.

关键词： umbilical cord mesenchymal stem cells cell transplantation amnion sciatic nerve injury restoration stem cells neural regeneration

Education Knowledge System Combination Model Based on the Components

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Wuhan University Journal of Natural Sciences 2007年第6期12卷 1013-1018页

作者： CHEN Lei li dehua li Xiaojian WU Chunxiang Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan 430074 Hubei China School of Computer Wuhan University Wuhan 430072 Hubei China

Resources are the base and core of education information, but current web education resources have no structure and it is still difficult to reuse them and make them can be self assembled and developed continually. According to the knowledge structure of course and text, the relation among knowledge points, knowledge units from three levels of media material, we can build education resource components, and build TKCM （Teaching Knowledge Combination Model） based on resource components. Builders can build and assemble knowledge system structure and make knowledge units can be self assembled, thus we can develop and consummate them continually. Users can make knowledge units can be self assembled and renewed, and build education knowledge system to satisfy users＇ demand under the form of education knowledge system.

关键词： knowledge unit components education knowledge system knowledge combination model

Draft Consensus Building in Hall for Workshop of Meta-Synthetic Engineering

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Wuhan University Journal of Natural Sciences 2008年第1期13卷 45-49页

作者： XIONG Caiquan li dehua JIN lianghai Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology Wuhan 430074 Hubei China School of Computer Science Hubei University of Technology Wuhan 430068 Hubei China

This paper discusses that there are two sorts of group consensus in Hall for Workshop of Meta-synthetic Engineering： draft consensus and decisive consensus, which are respectively formed in the two synchronous stages in the process of ＂synchronous stages 1- asynchronous stages- synchronous stages 2＂, and focuses on the concept of draft consensus. Then proposes a draft consensus building model and its solution method called Consensus Building Graph, by which claim concern value, claim support value, claim authority value and claim consensus value can be calculated real time for reaching a consensus, and designs a computer aided consensus building system called Internet based Group Discussion Environment. The model follows the methodology of meta-synthesis from qualitative to quantitative analysis in which computers and humans are combined to solve complex problems.

关键词： meta-synthetic brainstorm draft consensus Consensus Building Graph

Submerged culture of Magnetospirillum gryphiswaldense under N_2-fixing condition and regulation of activity of nitrogen fixation

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Chinese Science Bulletin 2002年第24期47卷 2095-2099页

作者： JIANG Wei, ZHAO dehua, li Ying, TIAN Jiesheng, WANG Zhenfang & li JilunDepartment of Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100094, China Department of Microbiology College of Biological Sciences China Agricultural University Beijing China

A submerged culture technique for Magneto-spirillum gryphiswaldense under the nitrogen-fixing condition (microaerobic and N-limited) was set up. In N-limited medium with Na-lactate as a sole carbon source, the optical density (A600 nm) and activity of nitrogen fixation of cells were 1.3 and 217 nmol of ethylene produced per hour per A600nm respectively within 21 h by three times of feeds. The pH and temperature were controlled at 7.2 and 30℃ respectively, and the oxygen concentration was controlled by sparging with N2 containing 0.4%-0.8% of O2. The activity of nitrogen fixation of cells was obviously inhibited by oxygen and ammonium. It indicated that the posttranslational regulation of nitrogenase existed in M. gryphiswaldense.

关键词： M. gryphiswaldense submerged culture nitrogen fixation regulation of nitrogenase activity.

A New Approach of Color Image Quantization

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通讯和计算机（中英文版） 2005年第3期2卷 72-76页

作者： HU Xinrong WANG Tianzhen li dehua Institute for Pattern Recognition and Artificial Intelligence State Education Commission Laboratory for Image Processing and Intelligence Control HuaZhong Univ. of Science＆Technology WuHan 430074 China Dept. of Computer Science ＆Technology Wuhan Institute of Science＆Technology WuHan 430074 China Institute of linage Processing WuHan Univ. of Technology Wuhan 430070China

Effect of Bi/Si Ratio of BiBSi Glass on Its Structure, Properties and Laser Sealing Shear Strength for Vacuum Glazing

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 13-24页

作者： liU Wei JIAO Jinxu LUO Dusha ZHOU Junjie SHI lifen WANG Weiwei li Changqing WANG Peng XIONG dehua li Hong State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Silica-Based Materials Laboratory of Anhui Province CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu 233018China State Key Laboratory of Advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu 233018China

The low-melting glass of Bi2O_(3)-B2O_(3)-SiO_(2)(BiBSi)system was used for the first time for laser sealing of vacuum *** the condition of constant boron content,how the structure and properties vary with Bi/Si ratio in low-melting glass was *** addition,the relationships between laser power,low-melting glass solder with different Bi/Si ratios and laser sealing shear strength were *** results show that a decrease in the Bi/Si ratio can cause a contraction of the glass network of the low-melting glass,leading to an increase of its characteristic temperature and a decrease of its coefficient of thermal *** laser sealing,the copper ions in the low-melting glass play an endothermic role.A change in the Bi/Si ratio will affect the valence state transition of the copper ions in the low-melting *** absorbance of the low-melting glass does not follow the expected correlation with the Bi/Si ratio,but shows a linear correlation with the content of divalent copper *** greater the concentration of divalent copper ions,the greater the absorbance of the low-melting glass,and the lower the laser power required for laser *** shear strength of the low melting glass solder after laser sealing was tested,and it was found that the maximum shear strength of Z1 glass sample was the highest up to 2.67 MPa.

关键词： Bi2O_(3)-B2O_(3)-SiO_(2)(BiBSi) Bi/Si ratio low-melting glass laser sealing vacuum glazing