Separation and Purification of Thrombin-like Enzymes by Affinity Adsorbents

An affinity adsorbent, benzamidineSepharose 4B, was used to separate and purify thrombinlike enzymes. The paminobenzamidine as a specific ligand was coupled to the matrix-Sepharose 4B. The recombinant thrombinlike enzyme-defibrase was used as a model in order to evaluate the efficiency of this biospecific affinity adsorbent. The homogeneity of the enzyme preparation was comfirmed as one band on sodium dodecyl sulfatepolyacrylamide gel electrophoresis.     

Effect of Third-order Dispersion of Birefringent Fiber on Pulse Transmission

The effect of thirdorder dispersion on pulse transmission is discussed. The coupled nonlinear Schrdinger equations characterizing the birefringent singlemode fibers is solved numerically with combined consideration on chromatic dispersion, including second and thirdorder dispersions, polarization mode dispersion (PMD) and nonlinearity. Various simulation results are presented.     

A Kind of Braided-Lie Structures

We introduce a family of braided Lie algebras.They are Lie algebras in the unifying Yetter Drinfeld Long module categoryJJMQQ where J and Q are Hopf algebras.We study their structure and the braided Lie structure of an algebra A in JJM QQ.     

应用于高频低功耗系统的1.2V10GHz注入锁定分频器

设计了一个高频低功耗的注入锁定二分频器.该分频器通过将输入信号注入到LC振荡器的二次谐波点来实现注入锁定并对输入信号二分频.电路采用TSMC 0.18μm RF-CMOS工艺设计,分频器可以将幅度为300 mV的输入信号在8.6~11.2 GHz频率范围内进行二分频.在1.2 V的电源电压下,分频器核心电路的功耗为1.3 mW.该分频器可以被用于光电收发机以及其他高频低功耗系统.     

Off-line Programming Technology Based on RPC Communication Method and its Application

This paper puts forward a communication programming method between robot and external computer based on RPC (Remote Produce Call) communication method, which realizes robot distributed controlling network system model. And a new Robot off line programming method is built based on this communication method and network model. Further more, as an example, robot automarking and autocutting of shipbuilding profile system is developed, which proves the ideas of author's offline programming and development methods of robot flexible automation system.     

Design of House Keeping System for a Certain Micro Satellite

This paper presents the design of hardware and software of the house keeping system for a certain microsatellite. The system uses microelectronic technique, large scale integrated circuits, processors and computers which has the advantages of strong function, high flexibility and reliability, It satisfies the requirements for efficient performance，light weight, small volume，and low consumption of power for microsatellite.     

基于随机有限元法大跨度斜拉桥体系可靠度分析

大跨度斜拉桥由于存在众多不同的失效模式,导致其体系可靠度分析比较困难。但在众多失效模式中,仅有主要的失效模式对整个结构系统的失效概率起决定性作用。β约界法是体系可靠度分析中一种简单而精确的用于搜索主要失效模拟的方法。在β约界法搜索失效模式的过程中,需计算各个单元的可靠度指标。基于有限元的可靠度分析方法是一种高效和精确的可靠度计算方法,用该法研究了一座大跨度斜拉桥的体系可靠度问题。分析结果表明索的失效在整个斜拉桥的失效中起关键作用。     

A Novel One-legged Robot: Cyclic Gait Synthesis via Optimization

A cyclic flip gait is designed for a novel onelegged robot in the paper. Trajectory synthesis of the flip gait is formulized as a problem of numerical optimization subject to nonlinear secondorder constraints such as positive reaction force of ground and finite torque of the joints. The simulation results are given.     

强流质子加速器束流匹配研究

为了使感生放射性降低到可以接受的水平,强流质子加速器必须减少柬流损失。不同加速段间的束流匹配是减少束流损失和发射度增长的关键之一。研究了一台常温加速结构不同段间的束流传输线的匹配设计问题。采用TRACE3-D软件以及其他多粒子模拟软件,研究了在不同匹配状态下的束流特性。结果表明,设计所采用的横向和纵向匹配手段,能够有效地控制束晕产生和束流发射度的增长。     

Study on an Configuration Framework for Product Family

In implementing mass customization, how to respond rapidly to customers' require ments is a key problem. Configuration design is considered effective in early st age of product design. This paper studies a configuration method based on constr aints and fuzzy decision for product family. The configuration method is evolved from constraintbased product configuration. It employs fuzzy optimum selectio n in the reasoning process, which can select similar components when customers' r equirements can not be met precisely. In the configurator, product family is rep resented with GBOM(Generic BillOfMaterial) and ACL(Article Characteristic Li st ). Every node of GBOM has an ACL to list all instances of a component family. Co nstraints are attached to every node, which involves variable definition and con straints definition. In the reasoning process, constraint satisfaction and fuzzy optimum selection interact to search optimum solution. A prototype is developt ed to demonstrate how to run the configurator. The paper ends with a discussion of advantages, future work of the configuration method.     

An Efficient Topography Adaptive Filter for Insar Processing

An efficient implementation of the topography adaptive filter based on local frequency estimation is proposed, where chirpz transform is applied to enhance the accuracy of the frequency estimation. As a byproduct of this adaptive filter, the linear approximated phase model of the interferogram is employed to improve the coherence estimation. The impacts of the adaptive filter on global and local phase unwrapping algorithms are discussed. Finally, aiming at the negative effect that the adaptive filter can bring to local phase unwrapping algorithms, a fusion scheme that takes advantage of least square and several local phase unwrapping algorithms is presented.     

Development of Clinical Cement of Nanoapatite and Polyamide Composite

A new type of inorganicorganic biomimetic bone cement consisting of nanohydroxyapatite and polyamide 66 composite was investigated. This cement can be handled as paste and easily shaped into any contour. Nanoapatite and polyamide composite cement has a reasonable setting time, excellent washout resistance, high mechanical strength and bioactivity, and it is easily handled and shaped, which can be developed as a clinical cement. It can be predicted that nanoapatite/polymer composite cement would be a new trend of biomedical material, showing a promising prospect.     

基于最优潮流的二级和三级电压控制

基于实时的最优潮流提出一种合并的二级和三级电压控制方法,该方法能够周期性地刷新发电机电压调节器的参考电压。以最大负载能力为目标的最优潮流被用来实现所提控制方法。能够周期性地刷新发电机压调节器的参考电压。以最大负载能力为目标的最优潮流被用来实现此控制为法。所提技术的对比对象是经典的二级电压控制,其先导节点参考电压通过负载能力最大的最优潮流(三级电压控制)计算得到。在新英格兰10机39节点上所进行的不同运行条件和紧急状态下的时域仿真验证了所提二级和三级电压控制合并方案的有效性,并且展现了对于现有二级和三级电压控制的优势。     

双螺杆反应挤出制备碳纤维增强尼龙6复合材料的研究(英文)

为了实现连续规模化生产以及碳纤维在尼龙6复合材料中的均匀分布,采用了长径比为32:1的SLJ-35B型双螺杆挤出机.结果显示碳纤维在复合材料中分布非常均匀,碳纤维平均长径比约为20:1;在潮湿环境下与纯尼龙相比,碳纤维增强后的尼龙6复合材料各项性能的稳定性明显增加;扫描电镜照片显示碳纤维与尼龙基体强化学耦合显著提高了复合材料的整体粘结性.     

A Low power／Area Digital FIR Filter Design Based on PRF Framework

A novel DSP to ASIC (Application Specific Integrated Circuit)architecture design methodology is presented in this paper for reducing power/area consumption.Traditional methods always focus on optimizing hardware structure or algorithm separately.The authors propose a new method called PRF(Paralleling-Reducing-Folding)framework to combine hardware optimization with algorithm simplificxation.In the first step,paralleling,unfolding technology is applied to divide one data-path into several channels and expose the redundancy of the algorithm.In the second step,reducing,decoupling theory is used to reduce computational complexity,In the last step,folding,time-multiplexing method is used to merge similar components,As an exoteric methodology framework.many optimization methods can be integrated into the PRF framework.To optimize a 3N taps FIR(Fincte Impact Response)and obtain a content result,PRF methodology framework is applied.     

A Neuron-Oriented Programming System

A neruonoriented programming system based on parallel neural informati o n processing has been presented. With the neural programming system built upon 4～8 process elements(TMS C30), the system has thus provided users high speed, g e neral purpose and large scale neural network application development platforms e tc.     

Improving Classification Performance with Single-category Concept Match

Discarding more and more complicated algorithms, this paper presents a new classification algorithm with singlecategory concept match. It also introduces the method to find such concepts, which is important to the algorithm. Experiment results show that it can improve classification precision and accelerate classification speed to some extent.     

Hardware Routing Lookup with SDRAMT

The authors present a routing lookup architecture, SDIR(SDRAM based Direct Index Routing). With pipeline and interleaving access technique, SDIR can provide scalable lookup speed from 16.7 MPPS(megapacket per second) to 133 MPPS with SDRAM running at 133MHz frequency.     

Evaluation of the Importance of Web Pages

Google's algorithm on PageRank is analyzed in details. Some disadvantages of this algorithm is presented, for instance, preferring old pages, ignoring special sites and inaccurate judge of hyperlinks pointed out from one page. Furthermore, author's improved algorithm is described. Experiments show that the author's consideration on evaluating the importance of pages can make an improvement over the original algorithm. Based on this improved algorithm a topicspecific searching system have been developed.     

MPI并行计算性能的研究

探索了一种基于Windows系统平台的、用于实现高性能计算的MPI并行环境.采用MPI最新版本MPICH2-1.0.6作为并行计算的支撑环境,通过编制的三个具有代表性的MPI并行计算程序,并在以100M bps交换式局域网作为互连的机群上和具有双核处理器的PC机上分别进行了并行效率的实际测试,得到了预期结果,并做了相应分析.