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Table of Content

    20 August 2003, Volume 31 Issue 8
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    Design and Implementation of Matrix Multiplier for Inverter Harmonic Elimination Model Calculation
    Wu Shu-quan Wang Qian Xie Yun-xiang
    2003, 31(8):  1-5. 
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    A large quantity of matrix multiplier calculations must be executed in the iterative calculation of the inverter harmonic elimination PWM model．In order to fasten the calculation speed a matrix multiplier which is based on2-D square systolic array architecture is introduced in this paper in light of the parallel algorithm of matrix computation．The implementation of this matrix multiplier used by FPGA is analyzed and a comparison is made in terms of the computation speed and occupied hardware resources between the single processing element matrix multiplier and the2-D square systolic array architecture matrix multiplier．The research results show that the matrix multiplier based on2-D square systolic array architecture possesses advantages of parallel processing and flow computation．It can unify the load shorten the delay and increase the level of integration．It has proved to be a good algorithm of matrix multiplier computation with regard to the inverter harmonic elimination model calculation．
    Adaptive Removing／Inserting Frame of Video Sequence Process Based on Video Objec
    Xiao Yong-hao Yu Ying-lin
    2003, 31(8):  6-9. 
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    A preprocess（post-process） method of video encoding（decoding） to decrease the transmission bitrate is proposed in this paper．By true motion estimation‚those frames with motion vector less than a threshold will be removed from the video sequence and should not be transmitted‚but the frame number must be transmitted．After being decoded. The removed frames can be reconstructed by the corresponding reference-frames according to the frame number．In order to improve the visual effect some intermediary frames may be inserted into the image sequence according to the motion vector．The intermediate frames may be produced by interpolation algorithm． 
    Methods of Automatic Video Scene Segmentation
    Sun J-i feng Li Ying-xiong
    2003, 31(8):  10-14. 
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    Several automatic video scene segmentation technologies are discussed in this paper．An edited video consisting of two kinds of scene boundaries known as straight unts and optical cuts in created．Experimental results using a variety of videos demonstrate that both the moving window detection algorithm and the10-step difference histogram comparison algorithm are effective for the detection of both kinds of scene cuts．
    Improvement Noise Characteristics of Bipolar Junction Transistors Using Low Energy Argon Ion Beam Bombardment
    Li Xu Huang Me-i qian Chen Ping Li Guan-qi
    2003, 31(8):  15-18,22. 
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    A low energy argon ion beam has been applied to bombard the backsurface of silicon wafers after the ultrahigh frequency low power transistors are fabricated and the noise coefficient of low frequency and high frequency can be decreased effectively the characteristics frequency and current gain of direction current can be increased．The experimental results show that the decreasing of low frequency noise coefficient are relevant to the decreasing of interface state density at SiO2－Si system and the reduction of high frequency is owing to the increasing of the characteristics frequency and current gain of direction current． 
    Improvement Noise Characteristics of Bipolar Junction Transistors Using Low Energy Argon Ion Beam Bombardment
    Li Xu Huang Me-i qian Chen Ping Li Guan-qi
    2003, 31(8):  19-22. 
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    A low energy argon ion beam has been applied to bombard the backsurface of silicon wafers after the ultrahigh frequency low power transistors are fabricated and the noise coefficient of low frequency and high frequency can be decreased effectively the characteristics frequency and current gain of direction current can be increased．The experimental results show that the decreasing of low frequency noise coefficient are relevant to the decreasing of interface state density at SiO2－Si system and the reduction of high frequency is owing to the increasing of the characteristics frequency and current gain of direction current．
    Application of Diversity Strategy Based on Frequency Matrix in Genetic Algorithm
    Shu Lei Hao Zh-i feng Lin Da-ying
    2003, 31(8):  23-26. 
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    A frequency-based matrix diversity strategy is applied in the traditional Genetic Algorithm．The frequencybased matrix recorded the appearance frequency of the special solution from the initial solution to the local optimized solution．So it can supply some useful information to help GA jump out of the local optimized solution．We apply this strategy to the GA for quadratic assignment problem and get satisfied results．
    Construction of P．Pichia Expression Vector of Human Anti-HBsAg ScFv-IFNγGene and Expression of Interested Protein
    Zhou Sh-i shui Su Kuan-yuan Zhu Ming-jun Yao Ru-hua Yu Zhou-yao
    2003, 31(8):  27-30,41. 
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    The human ant-i HBsAg ScFv and interferon gamma were connected with the linker to construct the ScFvIFNγgene by using overlap PCR techniques．The sequence of the ScFv-IFNγgene in the vector proved to be the same as the designed gene by sequencing．The ScFv-IFNγgene was successfully converted into the Pichia pastoris expression vector pPICZαA and transformed into Pichia pastoris X33．Screened strains were cultivated with methanol．Protein in the 42000of SDS-PAGE and WESTERN BLOT was obviously seen on the cultivated supernatant．The research has laid the foundation for further purifying interested protein as well as for raising the secretory expression level of interested protein．
    Structure Analysis of Component PSO3E of Pertroleum Sulfoxide
    Li Yan-li Gu Guo-bang Zhong Li
    2003, 31(8):  31-35. 
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    The probable molecular structures of PSO3E which came from petroleum sulfoxide were deduced by analyzing IR and GC-MS spectra of PSO3E．According to the IR and GC-MS spectra of PSO3E PSO3E was cyclic sulfoxides．In the light of the interpretation of mass spectra of cyclic sulfoxides and the character of the strongest peak of PSO3E mass spectra PSO3E were a series five-membered cyclic sulfoxides．A series of PSO3E’s ion peaks were found to be C ＋ n H2n－1 CnH2n S ＋OH and CnH ＋ 2n－1S through the interpretating the spectra of PSO3E．The position of substituted radical R was decided according to the peak of ion peaks of CnH2nS ＋OH ．Thus when the value of peak which m／e equals91is larger than that which m／e is77 it was substituted by α-position on the contrary it was substituted by β-position．The analytic results show that PSO3E is a group of isomeric sulfoxides and they are single alkyl sustituted cyclic sulfoxides． 
    Analysis of the Synergy Relation of Turbulent Flow and Convection Heat Transfer in a2-D Passage with Ribs 
    Chen Ying Deng Xian-he Wang Yang-jun Li Zh-i wu
    2003, 31(8):  36-41. 
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    A numerical investigation of a2-D flow passage with two rib heights is presented in this study．The calculated results indicate that the angles between temperature gradient and velocity in the heat transfer sub-layer influence heat transfer of the whole turbulent region．The mechanism of heat transfer augmentation on the passage is analyzed‚and a new way to vary the layer is presented to control two fields synergy．Thus the Field-Synergy Theory is extended within the fully-developed turbulent flowing field．
    Existence of Positive Solution for a Singular Coefficients Elliptic Equation Involving Critical Exponent
    Yao Yang-xin Xie Chao-dong
    2003, 31(8):  42-44. 
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    In this paper some existence results of solution of following an elliptic equation with singular coefficients －△u－μ u ｜x｜2＝u 2 ∗－1＋λ u q－1 ｜x｜σ‚x∈Ω；u＞0 x∈Ω；u＝0 x∈∂Ω are studied by virtue of Hardy inequality and the Mountain Pass Geometry．
    Post-buckling of Piezoelectric Rectangular Plate Under Unilateral Pressure 
    Chen Yan Huang Xiao-qing Ma You-fa
    2003, 31(8):  45-49. 
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    By applying the double Fourier series as the displacement mode and the Galerkin procedure the exact solution of the non-linear post-buckling of transversely isotropic piezoelectric rectangular thin plates under simply supported boundary conditions and unilateral pressure is obtained．Numerical results show that the effect of geo-metry parameters on the post-buckling path are similar to those of homogenous material thin plates‚the post-buckling loads is proportional to the piezoelectric-dielectric parameter and the material resonance phenomena is observed as well．The effects of parameters of the material and geometry on the characteristics of the post-buckling path are also presented．
    Fundamental Problem of Elastic Half-plane with Arbitrary Cracks
    Huang Min-hai Kong De-qing Zeng Hong-yun
    2003, 31(8):  50-52. 
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    A new formulation is provided for the fundamental problem of elastic half-plane with arbitrary cracks．By using proper decomposition of the functions and elimination‚the problem is reduced to Riemann-Hilbert’s boundary value problem on cracks．The stress functions of elastic body are obtained in closed form of integral expression and the stress intensity factors on the tip of cracks are also derived．
    Numerical Stability and Error Estimate of the Spline Fictitious Boundary Element Method#br#
    Su Cheng　 Zheng Chun
    2003, 31(8):  53-56. 
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    The spline fictitious boundary element method （SFBEM） is a modified method to the conventional indirect
    singular boundary element method．SFBEM not only retains the advantages of boundary element method‚but also avoids
    solving singular integral equations．Improvements in the choice of trial functions and weight functions have also been
    made in SFBEM．High accuracy and efficiency have been observed in the method．This paper presents the investigation
    of numerical stability and error estimate of SFBEM in elastic plane problems．Several conclusions regarding the above is-
    sues are obtained in this paper‚which lays a solid foundation for its practical application．
    Type and Microstructure of Hydration Products of Fly-ash Aerated Concrete 
    Wu Xiao-mei Fan Yue-ming
    2003, 31(8):  57-61. 
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    The microstructure of hydration products of fly-ash aerated concrete with different curing conditions was studied by using such methods as XRD‚SEM etc．The impact of different curing temperatures on the forming of hydration products was also investigated．
    Mechanical Engineering
    Shrinkage Compensation in Cutting of Tensioned Membrane Structure
    Xu Q-i gong Han Da-jian
    2003, 31(8):  67-70. 
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    Cutting is an important step in the analysis of tensioned membrane structure and shrinkage compensation constitutes a very important parameter in cutting analysis‚which affects the safety and economy of a project．In this paper the effects of load‚prestress and creep on the shrinkage compensation are studied．Some suggestions are given for the determination of shrinkage compensation in engineering practice．Its effect on the interior force of the structure is also discussed． 
    Experimental Research on Shear Resistant of Shear Bar Placed in Concrete Interface with Lateral Restraint
    Chen Bin Liu Shu-zhuo Zhang jie
    2003, 31(8):  71-76. 
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    The results of a shear resistant test of13specimens are presented in this paper．The specimens were designed to simulate the stee-l concrete shear transfer interface of the concrete filled steel tubular（CFST） column-RC beam joint  on which some shear bars were stuck to improve the shear resistant capacity．The parameters of concrete strength shear span ratio bar position dowel action etc．were taken into account in the research．The test results show that the shear bar may serve as an effective means for shear transfer．The experimental research also serves as a good reference to the design of the CFST column-RC beam joint．
    Innovation and Breakthrough：An Interpretation of Meier ’ s New Architecture
    Zhao Wen
    2003, 31(8):  77-81. 
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    Through interpreting a series of Meier’s representative works of the 1990’s‚this paper analyzes the social background‚against which changes in Meier’s designing concept have taken place．It also discusses how Meirer has responded to the enviromental changes by malling use of varions design methods and technologies．Meier’s rational design concept and methods are also fully investigated．It is hoped that the paper will give Chinese architects some insight． 
    Manufacture of Hydrolyzed Animal Protein from Scallop Skirt 
    Zeng Qing-zhu Zeng Qing-xiao Wang Tao Xu Qing-ling
    2003, 31(8):  82-87. 
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     After hydrolysis with mixed protease the hydrolysates of scallop skirt was purified by hollow fiber ultrafiltration（UF）．The processing parameters for the manufacture of liquid-HAP in good quality were investigated．Results show that the content of polypeptides peptides and free amino acids in the liquid-HAP is largely increased by using flavorzyme after4h pre-hydrolysis with A．S．1．398neutral subtilisin．And that permeation flux was affected by operating pressure temperature pH value of hydrolysates and the ratio of volume to concentration （RVC）． Optimal operative condition which might prolong working time of the device with high permeation flux minimize pollution of membranes and raise separating efficiency is pH7．0～7．5at 43℃ under0．10MPa and the membranes rinsed repeatedly for2minutes after every operating for10minutes．These results suggest that sense index of fractionated hydrolysates is superior to that of the original hydrolysates． 
    Effect of Popcorn Dipped in Different Liquors on Microwave Vacuum Popping 
    Huang Ru-qiang Rui Han-ming Zeng Qing-xiao
    2003, 31(8):  88-91,96. 
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    The effect of popcorn dipped in different liquors such as moisture salt water and alcohol on microwave vacunm popping was studied in this paper according to the index of the volume expansion ratio．It was found that the moisture content of popcorn was one of the primary factors to affect the volume expansion ratio．Under the microwave vacuum condition the optimum popping effect occurs when the moisture content was11．3％ with vacuum26．66kPa and20．4％ with vacuum93．3kPa；Popcorn which is soaked in10％ （mass fraction） salt solution and in40％ alcohol solution respectively could obtain optimum microwave vacuum popping effect．
    Fuzzy Control and Simulation on Multiple Series Connection Hybrid Traction System
    Luo Yu-tao Huang Xiang-dong
    2003, 31(8):  92-96. 
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    The effect of popcorn dipped in different liquors such as moisture salt water and alcohol on microwave vacunm popping was studied in this paper according to the index of the volume expansion ratio．It was found that the moisture content of popcorn was one of the primary factors to affect the volume expansion ratio．Under the microwave vacuum condition‚the optimum popping effect occurs when the moisture content was11．3％ with vacuum26．66kPa and20．4％ with vacuum93．3kPa；Popcorn which is soaked in10％ （mass fraction） salt solution and in40％ alcohol solution respectively could obtain optimum microwave vacuum popping effect． 
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