Analysis of Advantages and Disadvantages of Cyber Language in China

After China joined in WTO, computers make a great influence on Chinese users, especially young generations. With a growing cultural exchange on Internet, language is also changing its original form. Convenience and novelty are apparent characteristics of language,we call it Cyber Language. Certainly, Cyber Language has advantages and disadvantages to its development as well as a coin.     

浅析实现单相异步电动机正反转的三种电路

单相异步电动机在家用电器中运用非常广泛,有些电器设备需要其电机可正反转,这就需要我们了解实现单相异步电动机正反转的原理及实现电机正反转的外部接线图,文章就该问题展开论述。     

Colpitts电路中的双涡卷混沌寄生振荡分析

通过在Colpitts振荡器中引入二次反馈项,观察到了新奇的双涡卷吸引子.这个具有反馈项的混沌系统具有3个平衡点,产生不同于Lorenz和Colpitts系统的复杂吸引子.对系统的一些基本特性,如平衡点、稳定性、Lyapunov指数谱、分岔图、相轨与庞加莱截面等进行了详细的分析.     

自由能-氧化态图及其应用

比较详细的介绍了自由能-氧化态图的构筑及应用。     

New Voronoi Diagram Algorithm of Multiply-Connected Planar Areas in the Selective Laser Melting

This paper studies the practical generation of Voronoi diagrams for multiply-connected planar areas bounded by line segments. The core of the algorithm was calculating Voronoi polygon of every Voronoi object in planar areas independently. The main approach had two steps. The first step was calculating all relevant bisectors of every Voronoi object. The second was combining obtained bisectors into completed Voronoi polygons individually. All code was implemented in Visual C++ platform. The resulting code was extensively tested in real-world data and its practical running time grew only linearly. Three statistical CPU-consumption charts had been drawn with the Voronoi diagrams computation data, and compared with other published codes for computing Voronoi diagrams. The algorithm was applied to compute offsetting of slice area consisting of large-scale line segments for the selective laser melting (SLM) trajectory scanning technology which is a kind of rapid prototyping (RP). The experimental results of offsetting for slice area based on Voronoi diagrams show that the approach is effective and simple for polygon offsetting problems. The method is helpful to those offsetting work and can provide more effective offsetting solution.     

逻辑代数在PLC控制系统中的应用

介绍了1种用双PLC备份实现某化工厂工艺电器控制系统硬件电路设计方法．根据继电器常用的工作方式，探讨了继电器的逻辑关系表达式，将逻辑代数这一数学工具引用到继电器控制和PLC梯形图设计中能够快捷、准确地实现控制系统原理图．对于复杂的二次原理图还可以采用分块设计然后再组合，大大地提高了工作效率，实践证明，该方法简单、快捷，并且具有灵活性．     

梅逊增益公式参数在方块图中的定义和说明

在自动控制理论中,梅逊增益公式用于求解复杂的信号流图传递函数是很有效的.但求解复杂方块图的传递函数须将方块图转化为信号流图才可应用梅逊增益公式.分析了信号流图与方块图之间的内在关系,对梅逊增益公式中的参数在方块图中进行了定义和说明,定义了方块图中互不接触的概念.提出了直接将梅逊增益公式用于求解复杂方块图传递函数的表述.     

Optimal design of label-free silicon“ lab on a chip” biosensors

This paper reported the optimal design of label-free silicon on insulator(SOI) "lab on a chip"biosensors.These devices are designed on the basis of the evanescent field detection principles and interferometer technologies.The well-established silicon device process technology can be applied to fabricate and test these biosensor devices.In addition,these devices can be monolithically integrated with CMOS electronics and microfuidics.For these biosensor devices,multi-mode interferometer(MMI) was employed to combine many stand-alone biosensors to form chip-level biosensor arrays,which enable realtime and label-free monitoring and parallel detection of various analytes in multiple test samples.This sensing and detection technology features the highest detection sensitivity,which can detect analytes at extremely low concentrations instantaneously.This research can lead to innovative commercial development of the new generation of high sensitivity biosensors for a wide range of applications in many fields,such as environmental monitoring,food security control,medical and biological applications.     

Evans图法研究SbO_Zn置换体系的反应速度

本文采用旋转电极上的动电位扫描法以及旋转杯盘电极技术研究了硫酸钠溶液中(pH=4.0)的SbO~+/Zn置换反应,并根据Evans图法,计算了SbO~+/Zn置换反应的速度常数(k).900rpm时;k=(1.7±0.2)×10~(-5)m·s~(-1).Evans图表明,SbO~+离子可被金属锌还原至SbH_3,其反应过程受SbO~+离子向电极表面的扩散过程控制.     

蚕豆子叶愈伤组织的生长与分化

利用蚕豆(Vicia faba)未成熟种子的幼龄子叶为外植体,以MSB_5为基本培养基,可较好的克服蚕豆组织和细胞培养中遇到的诱导率低、生长缓慢、褐化死亡等困难。第一代或继代一次的蚕豆幼龄子叶的愈伤组织可分化出幼芽和根。继代两次以上的愈伤组织则失去分化能力,但仍能继代培养,现已继代培养两年之久,可作为植物细胞工程的原始材料加以利用。