纺织酸浴过程多通道实时监控及数据查询系统

国内绝大多数化纤企业仍然采用人工取样滴定酸浴检测方法，而这种方法由于受人为因素的影响很大，导致测量重复性差、测量结果滞后、实时性差，因而调配的酸浴品质不高，浓度波动较大，对粘胶纤维的生产品质影响很大。针对以上问题，采用S7—200PLC和VISUAL Basic及SQL Server数据库，开发了多通道实时监控系统，该系统配置灵活，扩充方便，可靠性高，能以支现形象的方式表现实时数据，同时对历史数据采用SQL Server数据库进行了保存，可方便地进行查询和分析。实际应用表明具有良好的运行效果。     

实质重于形式原则的应用

为满足会计信息使用会计对会计信息高质量的要求，使会计信息更加可靠、相关，各国推行实质重于形式原则，我国《企业会计制度》将其作为会计核算的基本原则，结合《企业会计制度》说明实质重于形式原则在我国的具体运用，强调会计人员应具备良好的职业判断能力。     

成就动机的激发与维持在体育专业足球教学中的实验研究

运用麦克利兰的成就动机理论，采用文献资料法、问卷调查法、实验对比法和数理统计的方法，在高等师范体育教育专业足球教学中进行激发与维持学生成就动机的实验研究．结果表明：实验班成绩优于对照班，且有显著性的差异．在足球教学中激发与维持学生的成就动机，可以有效地提高足球教学的效果和学生的足球成绩．     

遗传算法在气体分离装置调优中的应用

提出了一种基于遗传算法和随机复合形法相结合的混合遗传算法，并以某厂气体分馏装置的生产过程的优化问题进行了测试，得出了优化操作条件。     

Inhibitory effect of the adenovirus type 5 E1A protein expressed in the yeast system

The human adenovirus type 5 E1A, a tumor- suppressor gene[1], codes for two major related proteins of 243 amino acids (12S) and 289 amino acids (13S) by al-ternative splicing in two exons[2]. Studies have been shown that E1A can regulate expression of many genes and cell cycle[3]. Both in vitro and in vivo experiments indicated that E1A could induce tumor cells differentia-tion, convert tumor cells into an epithelial phenotype, in-hibit tumor cell growth and metastasis and strongly en-ha…     

Compact difference approximation with consistent boundary condition

For simulating multi-scale complex flow fields it should be noted that all the physical quantities we are interested in must be simulated well. With limitation of the computer resources it is preferred to use high order accurate difference schemes. Because of their high accuracy and small stencil of grid points computational fluid dynamics (CFD) workers pay more attention to compact schemes recently. For simulating the complex flow fields the treatment of boundary conditions at the far field boundary points and near far field boundary points is very important. According to authors' experience and published results some aspects of boundary condition treatment for far field boundary are presented, and the emphasis is on treatment of boundary conditions for the upwind compact schemes. The consistent treatment of boundary conditions at the near boundary points is also discussed. At the end of the paper are given some numerical examples. The computed results with presented method are satisfactory.     

空气水两相段塞流的跟踪模拟及试验研究

分析了前人提出的段塞跟踪模拟方法的优缺点 ,根据液塞头部的加速压降和入口液塞长度分布特征对段塞跟踪模型进行了改进。采用面向对象技术 ,实现了水平和倾斜管道段塞流的跟踪模拟 ,并与多相流试验环道的空气水试验数据进行了对比。模拟结果表明 ,当不考虑加速压降时 ,用跟踪模型预测的压降低于实测值 ;当考虑加速压降时 ,用跟踪模型预测的压降高于实测值。在管道上固定位置测出的压力信号符合正态分布 ,管道上某一固定点处液塞头部和尾部的速度分布也符合正态分布。当不考虑气泡尾波作用时 ,液塞长度沿管线增长较慢 ,分布形状无变化 ;但是考虑气泡尾波作用时 ,在入口附近液塞长度平均值增长较快 ,统计分布沿管轴向呈对数正态分布。     

Asymptotic Approximations of Jacobi Polynomials and Their Zeros with Error Bounds

IntroductionUniform asymptotic expansions and error boundsof the (α,β>- 1 ) two- term approximations of theJacobi polynomials P(α,β)n ( cosθ) were obtained[1] .Their result wassin θ2α cosθ2βP(α,β)n ( cosθ) =Γ( n +α + 1 )n!θsinθ1/ 2 Jα( Nθ)Nα +θB0 (θ) Jα+1( Nθ)Nα+1+σ2 ,|σ2 |≤ E2 θ2 +αN -2 ,　 0≤θ≤ π2 ,where E2 is a construct.Baratella and Gatteschiused the first two terms of this expansion[2 ] toconstructa more accurate one- term approximation:x(θ)x′(θ)…     

聚丙烯无卤阻燃复合材料的制备及性能研究

以聚丙烯(PP)为基料、Mg(OH)2／Al3/P为复合阻燃剂。通过熔融共混制备PP无卤阻燃复合材料。对材料的阻燃性能和力学性能进行了测定。实验结果表明：当PP：Mg(OH)2：Al(OH)2：P为100：50：50：5时，混合物的阻燃性能和力学性能均能满足使用要求。填加纤维状Mg(0H)2的材料要比填加球状Mg（OH)2体系的拉伸强度优异。     

Improved Dissolve Detection for Video Segmentation

It is difficult to detect dissolve accurately in video segmentation. Two new parameters AEI and/DM are computed to describe dissolve. An improved method based on the change curves of AEI and/DM is proposed to detect dissolve accurately. The experiments show that this method can detect dissolve accurately.