ME4ET:一个基于EDOC ER模型的模型转换工具

模型驱动体系结构（MDA）是一个以模型和元数据为中心的软件体系结构．在MDA体系中，抽象模型是软件开发的主要产品．与传统的软件开发过程相比，模型转换，特别是平台无关模型和平台相关模型之间的转换，在MDA体系中具有重要作用．模型转换需要自动化的模型转换工具的支持以减少软件开发的成本．介绍一个MDA模型转换工具——ME4ET．陔上具支持EDOC ER模型的建模，并支持将EDOC ER模型自动转换为数据库平台和EJB平台上具体的实现，主要介绍ME4ET工具的模型转换规则和算法．     

新型氮支套索冠醚的合成及络合阳离子的电导特征

以苯氧乙醇为起始剂合成了两种新型氮支套索冠醚：N-苯氧乙基单氮杂-18-冠-6（18CE）与N-苯氧乙基单氮杂-15-冠-5（15CE），通过红外光谱、核磁共振氢谱、紫外光谱和元素分析表征了新冠醚及其中间体的结构，测试了18CE与15CE络合阳离子对溶液电导率的影响。     

Polynomial Analysis of DH Secrete Key and Bit Security

In this paper, we lower the upper bound of the number of solutions of oracle transformation polynomial F(x) over GF(q). So one can also recover all the secrete keys with fewer calls. We use our generalized ““““““““even-and-odd test““““““““ method to recover the least significant p-adic ‘bits‘ of representations of the Lucas Cryptosystem secret keys x. Finally, we analyze the Efficient Compact Subgroup Trace Representation (XTR) Diffie-Hellmen secrete keys and point out that if the order of XTR subgroup has a special form then all the bits of the secrete key of XTR can be recovered form any bit of the exponent x.     

Hermite插值多项式的逼近

研究了Hermite插值多项式H_(2n-1)(f,x)的二阶导数逼近问题.     

Initiating, growing and cracking of hydrogen blisters

The growing process of a hydrogen blister in a wheel steel was observed in situ with an optical microscope, and the fracture surfaces formed from broken blisters on a wheel steel and bulk metallic glass were investigated. The initiating, growing, cracking and breaking of hydrogen blisters are as follows. Supersaturated vacancies can increase greatly during charging and gather together into a vacancy cluster （small cavity）. Hydrogen atoms become hydrogen molecules in the vacancy cluster and hydrogen molecules can stabilize the vacancy cluster. The small cavity becomes the nucleus of hydrogen blister. The blister will grow with entering of vacancies and hydrogen atoms. With increasing hydrogen pressure, plastic deformation occurs first, the hydrogen blister near the surface extrudes, and then cracks initiate along the wall of the blister with further increasing hydrogen pressure. A cracked blister can grow further through propagating of cracks until it breaks.     

In vivo Dynamic Studies of Brain Metabolism

Nuclear magnetic resonance （NMR） can noninvasively monitor intracellular concentrations and kinetic properties of numerous inorganic and organic compounds. A ^31p NMR surface coil was used in vivo to dynamically measure phosphocreatine （PCr）, adenosine triphosphate （ATP）, and intracellular inorganic phosphate （Pi） levels in mouse brain during ischemia-reperfusion to study the damage of cerebral tissues caused by ischemia and effects of herbs on cerebral energy metabolism during ischemia-reperfusion. The study provides dynamic brain energy metabolism data during different periods. The data show that some herbs more rapidly increase the PCr level during the recovery phase than in the control group.     

Separation of hydrophobic gold nanoparticles less than 10 nm by electrophoresis

An electrophoresis device was used to separate hydrophobic gold nanoparticles with particle size less than 10 nm dispersed in organic solvent. Image of transmission electron microscope （TEM） and UV-Vis spectra showed that the particles in the vicinity of cathode have a smaller mean diameter than those near the anode. This result indicates that the nanogolds in chloroform bring a positive charge in opposition to what is predicted by Coehn rule, and provides an electrophrosis method for separating hydrophobic nanogold particles of different sizes.     

模糊层次分析法在地基处理方案优选中的应用

简要介绍了模糊层次分析法的基本原理和分析问题的步骤。基于模糊层次分析法的软土地基处理方案优选，结果表明选择结果与实际相符合。     

基于多线程技术下的数据库查询

详细介绍了多线程编程的关键技术,并运用该技术对数据库进行查询的实现方法和解决多线程并发同 步问题,并且通过实例对比了用户交互过程中单线程与多线程下的数据库操作性能,给出了Delphi环境下对 SQLServer数据库的多线程操作实例．     

粉虱座壳孢菌毒素杀虫活性试验

从福建省柑桔园内分离出的粉虱座壳孢菌(Aschersonia aleyrodis),经发酵培养,萃取得到内、外毒素的粗提物,并将其应用于防治烟粉虱和桃蚜的研究。实验结果表明,2龄粉虱和蚜虫对外毒素敏感,处理2d后的粉虱死亡率在80%以上,处理后的蚜虫死亡率随处理时间的延长和浓度的提高而增大。内毒素对粉虱也具有杀虫活性,而对蚜虫未检测到活性。座壳孢菌外毒素对蚜虫具有杀虫活性未见报道,是新的毒素资源。