基于DMC204的数控系统开发与应用

提出了在Windows操作系统平台上实现实时多任务处理的CNC系统控制体系结构，并依据这一结构方案，具体实现了一个具有开放性、模块化特征的简易CNC应用软件，该数控软件在经改造后的CK6140H普通车床上应用结果表明，车床的运行精度和效率大为提高。     

利用椭圆偏振光谱法研究硅片上DNA分子杂交

将单晶硅片硅烷化后，用戊二醛做醛基修饰，将5′端氨基修饰寡核苷酸探针片段通过醛－氨共价键结合在硅片上，然后用椭圆偏振光谱法对探针和不同序列样品的杂交反应进行了研究。结果表明该方法能在不对样品进行荧光标记的情况下直接研究杂交反应的效率，从而得知样品的序列信息。     

合成气在超临界流体及F-T重质烃中的扩散行为研究

对CO和H2在483K、3．5MPa条件下，在充满F－T合成产物（平均相对分子质量400）或超临界正戊烷的催化剂微孔内的扩散速率、孔内气体浓度分布以及催化剂的内表面利用率进行了模拟计算。结果表明合成气在F－T产物中的扩散速率比超临界介质中低得多，从而造成了气相反应中从催化剂孔中到孔内显著的合成气浓度梯度及催化剂内表面利用率的下降，从理论上解释了超临界条件下CO转化率和烃收率优于气相反应的原因。     

异质数据库中具有矛盾结构的关系的集成

局部方案之间存在各种各样的语义差异 ,所以在构造异质数据库系统中 ,方案的集成就成为一个重要的规则。本论文给出的方法是根据本地策略中元数据的不同将关系分成不同的类型 ,把具有不同策略结构冲突的本地关系转换成具有同种结构的新的关系 ,然后将这些新的关系进行集成     

SiO_2PMMA复合材料的粒度和结构

溶胶 凝胶技术合成了SiO2 PMMA无机 有机复合材料的均匀体系。用小角X 射线衍射、X 射线能谱仪对所合成的SiO2 PMMA无机 有机复合材料体系进行了粒度的测量。给出了在该种复合材料中 ,无机与有机成分的含量相对变化时 ,体系的粒度并不发生显著变化 ,该体系是有机相被包覆在无机相中所形成的网络等结论     

PGE patterns of ores of Dajing Cu-polymetallic deposit in Linxi County,Inner Mongolia: Indicator to source of metallogenic elements

By comparing PGE patterns of sulfide ores with that of basic-ultrabasic dikes occurring in the Dajing Cu-polymetallic deposit, we discover that there are similar positive slopes between the basic-ultrabasic dikes and the black ores composed mainly of sphalerite and galena, reflecting affinity of their source. The PGE patterns of the yellow ores composed basically of chalcopyrite, arsenopyrite and pyrite are actually different. One is close to the pattern of the mantle lherzolite, and others resemble the pattern of the basic rocks. However, the concentrations of Ru are higher in the yellow ores, reflecting that sulfur attains or approaches saturation in their parent magma. The PGE characteristics of ores and dikes show that the magmas derived from the deep of crust and the metallogenic elements were supplied mainly by growth material of the crust. In addition, the mantle-derived magma also offered some elements.     

A genetic algorithm on multiple sequences alignment problems in biology

The study and comparison of sequences of characters from a finite alphabet is relevant to various areas of science, notably molecular biology. The measurement of sequence similarity involves the consideration of the possible sequence alignments in order to find an optimal one for which the “distance” between sequences is minimum. In biology informatics area, it is a more important and difficult problem due to the long length (100 at least) of sequence, this cause the compute complexity and large memory require. By associating a path in a lattice to each alignment, a geometric insight can be brought into the problem of finding an optimal alignment, this give an obvious encoding of each path. This problem can be solved by applying genetic algorithm, which is more efficient than dynamic programming and hidden Markov model using commomly now. Foundation item: Supported by Zi-qiang Foundation of Wuhan University and Open Foundation of the State Key-Laboratory of Software Engineering, Wuhan University Biography: Shi Feng(1966-), male, Associate professor, research direction: bioinformatics.     

Abnormal expression of centrosome protein (centrin) in spermatozoa of male human infertility

To study the relations between male infertility and centrosome protein (centrin) and the functions of centrin in spermatogenesis, the matured spermatozoa of 10 normal male people and 18 male infertility patients were stained by immunofluorescence labeling antibody against centrin. The results showed that two fluorescence signal dots appeared in the normal male spermatozoa and were located at the base of flagellum. They are proximal centriole and distal centriole. However, in some spermatozoa of the male infertility, centrin protein was located abnormally at the base of flagellum and its staining signals were spread, the normal proximal and distal centrioles were confused and could not be recognized separately. These results suggest that abnormality of centrosome protein may be related to male infertility. This discovery may be used as a marker of abnormal sperm and male infertility.     

Elastic wave scattering by two-dimensional periodical array of cylinders

We extend the multiple-scattering theory (MST) for elastic wave scattering and propagating in two-dimensional composite. The formalism for the band structure calculation is presented by taking into account the full vector character of the elastic wave. As a demonstration of application of the formalism we calculate the band structure of elastic wave propagating in a two-dimensional periodic arrangement of cylinders. The results manifest that the MST shows great promise in complementing the plane-wave (PW) approach for the study of elastic wave. Foundation item: Supported by the National Natural Science Foundation of China (No. 10174054) Biography: Mei Jun (1977-), male, Master candidate, research direction: the multiple scattering theory     

Summertime Subtropical Countercurrent on isopycnals in the western North Pacific

Circulations on isopycnals (σrθ) in the western North Pacific were investigated by using P-vector method;the data were taken from the U.S. Navy's climatological temperature and salinity dataset (public domain) with 1/2°×1/2° resolution. Results not only show the main circulation systems on isopycnals in the western North Pacific such as the North Equatorial Current (NEC), Kuroshio and Kuroshio Countercurrent, but also reveal the Subtropical Countercurrent (STCC) clearly. In this note we pay attention to discussing the distribution of STCC in summer (in June).The STCC flows eastward along a winding road; on shallow isopycnals, the STCC originates from the area east of Bashi Strait at about 122.5°E; with the isopycnals increasing, the origin and flow core of STCC move to north and east, but the main part of STCC is still between 18° and 23.5°N, i.e.near the Tropic of Cancer. There exists STCC on all isopycnals between the sea surface and 25.8 σθThe current vectors of STCC on isopycnais are shown for the first time, and the distribution of the potential vorticity indicates that STCC is just overlying the southern boundary of the Subtropical Mode Water (STMW).``