微波辐射氨基磺酸催化合成环己酮1，2-丙二醇缩酮

以氨基磺酸为催化剂，在微波辐射下环己酮与1，2-丙二醇反应合成了环己酮1，2-丙二醇缩酮。考察了反应物投料比、微波辐射功率、微波辐射时间、催化剂用量、带水剂用量等因素对产物收率的影响。得到了最佳反应条件：环己酮为0．2mol时，环己酮与1，2-丙二醇摩尔比1：1．3，微波辐射功率500W，辐射时间20min，催化剂用量为反应物总质量的0．18％，带水剂（环己烷）15mL，反应温度130℃。在此条件下，环己酮1，2-丙二醇缩酮的收率可达77．2％。     

常见的几种网页下拉菜单制作方法浅析

本文详细介绍了分别应用Dreamweaver、Firework、Flash工具来制作常见的几种网页下拉菜单的方法。并且对各种方法的优缺点做了详细的剖析。     

Microstructure identification of devitrified Cu–Ti–Zr–Ni bulk amorphous alloy

The microstructures of devitrified Cu–Ti–Zr–Ni bulk amorphous alloy were identified by X-ray diffractometry (XRD) and transmission electron microscope (TEM). XRD and TEM examinations show that the deep eutectic structures of the tested alloy consist of CuTi₂–Cu₁₀Zr₇, Cu₃Ti–CuZr, Cu₃Ti–Cu₁₀Zr₇–CuZr low-order eutectics. Moreover, short-range ordering clusters in the melt with configuration similar to that of Cu₁₀Zr₇ compound may contribute to the glass forming ability of bulk amorphous Cu–Ti–Zr–Ni alloy.     

ASON技术在长途传输网中的应用探讨

简单介绍了智能光网络(ASON)技术情况,并结合工程实践经验,对于ASON在长途传输网工程中的应用方式进行了探讨。     

Integrated cellular and ad hoc relaying systems: iCAR

Integrated cellular and ad hoc relaying systems (iCAR) is a new wireless system architecture based on the integration of cellular and modern ad hoc relaying technologies. It addresses the congestion problem due to unbalanced traffic in a cellular system and provides interoperability for heterogeneous networks. The iCAR system can efficiently balance traffic loads between cells by using ad hoc relaying stations (ARS) to relay traffic from one cell to another dynamically. This not only increases the system's capacity cost effectively, but also reduces the transmission power for mobile hosts and extends system coverage. We compare the performance of the iCAR system with conventional cellular systems in terms of the call blocking/dropping probability, throughput, and signaling overhead via analysis and simulation. Our results show that with a limited number of ARSs and some increase in the signaling overhead (as well as hardware complexity), the call blocking/dropping probability in a congested cell and the overall system can be reduced     

浅谈爆破安全技术

本文介绍了在爆破施工中采取的安全措施和应该注意的事项