数控实验教学初探

论述了开设数控实验的必要性，介绍了本校数控实验教学的内容和特点，总结了开设数控实验以来取得的教学效果。     

Microring-Assisted Coupling Between Dissimilar Waveguides

The use of microring resonators to assist in the evanescent field coupling between dissimilar waveguides is proposed and analyzed. Theoretical analysis based on the coupled mode theory and nu-merical example show that complete cross power transfers can be obtained near the microring resonances. Applications of the device include power dividers, low-power thermo-optic or electro-optic switches, and modulators.     

Synthesis of high molecular weight polylactic acid from aqueous lactic acid co-catalyzed by tin(II)chloride dihydrate and succinic anhydride

Poly(lactic acid) (PLA) is widely used as biodegradable plastic and biomedical materials due to its excellent me- chanical properties and biodegradable characterization. The price of poly(lactic acid) has gradually become com- petitive to the average alkene polymers since the method for the preparation of lactic acid from starch fermentation has been developed. With the decline of petroleum re- serves, much attention is devoted to polylactic acid due to its environmentally benignancy and its …     

Optimal Scheduling Method in MIMO WLAN with Distributed Coordination Function

This paper addresses the optimal number of simultaneous data transmissions that maximize the system throughput in an MIMO WLAN. To facilitate simultaneous packet transmissions, both transceivers have to exchange preambles to calculate the channel state information. This exchange is combined with the RTS (request to send)/CTS (clear to send) handshake which is used to contend for the channel in WLANs. This study presents an expression for the optimal number of simultaneous data transmissions under the distri...     

形状误差分离统一理论—解的确定性准则

形状误差分离的根本问题是误差分离方程的求解，其解是否存在，决定了形状误差能否分离．通过对现存的各种圆度、直线度、圆柱度及螺纹导程误差等形状误差分离技术的深入探讨，就形状误差分离技术的共同性质作了归纳，据此提出了在线误差测量和分离的一般方法，给出形式统一的矩阵方程．在此基础上，针对误差分离统一方程解的性质进行了详细讨论，应用矩阵理论给出了误差分离统一方程解的确定性准则．结合形状误差分离技术的具体实现，给出了多点法的测量传感器个数和多步法测量传感器移步步数的统一确定方法．     

均分形体的新算法

本文给出了由弗里曼链码求形体的面积、形心及均分形体的新算法。利用上述方法解决了现有的求面积算法难以实现的将形体分割为Ｎ个等面积的“扇形”问题，并将其成功地运用于科研课题中。     

FANUC与华中数控系统中常用指令的对比分析

本文就FANUC和华中数控系统中常用指令的功能及指令格式进行了详尽的对比分析,指出了它们的异同点及编程中的注意事项,为数控编程人员提供了一定的编程帮助。     

再生水工艺中曝气生物滤池的启动特性

对再生水工艺中曝气生物滤池的启动进行了试验研究,试验结果显示。启动8天后,滤柱出水的COD稳定在40 mg/L,去除率为60%;16天后,氨氮去除率稳定在54%左右:滤池出水水质可达到市政杂用水要求。     

测量放大器的制作

根据设计要求， 本着简单实用的原则采用高阻测量放大器作为主放大器； 并采取十进制码盘进行放大器放大倍数的预置； 同时自行设计信号变换电路进行信号的转换。电源部分采取二级稳压以保证电源稳定度     

氯化氰分析法的进展

阐述了氯化氰分析方法的进展，查阅了近３０年国内外期刊，涉及到光度法，色谱法、电导法及联用技术等。论及了各种分析的方法特点，研究对象，检测范围，以及方法的发展和仪器的联机组合。