含硫化合物在羰基钴盐合成中的应用

研究了利用低价含硫化合物的强配位能力和还原性及它作为助剂催化引发氯化钴的羰化反应的工艺条件，以便在较低的ＣＯ压力下合成四羰基钴盐。对几种常见含硫化合物的引发反应效果进行了对比。结果表明少量的含硫化合物可以引发钴盐的羰化反应，过多的添加则会阻断氯苄羰化反应的催化作用。     

酶法合成中色氨酸的测定

建立了光度测定酶法合成中色氨酸含量的新体系。该检测体系不仅能准确地测定产物色氨酸的含量，且对底物吲哚能同时测定。有效地避免了其他色氨酸测定方法底物吲哚的干扰，通过标准加入法色氨酸及吲哚的回收率分别为９７．８％～１０３．３％，９７．６％～１０３％。实验证明该体系简单、实用，测定结果可靠。     

基于虚通道故障粒度划分的3D NoC容错路由器设计

深亚微米工艺下,路由器受制于制造缺陷及运行时的脆弱性,易发生虚通道(virtual channel,VC)永久性故障,从而引起通信故障,影响系统功能和性能.为了能够有效地容忍虚通道故障、保证系统性能及充分利用可用资源,将虚通道故障类型细分为粗粒度故障和细粒度故障,提出SVS(single VC sharing)路由器架构,通过将路由器端口两两分组,组内端口间实现单虚通道共享.当发生虚通道粗粒度故障时,使用组内相邻端口共享虚通道容错.当发生细粒度故障时,根据Slot State Table信息配置虚通道读/写指针的值,从而跳过故障Buffer槽实现容错.在无粗粒度故障情况下,共享虚通道还可用于负载平衡及容忍路由计算模块故障.实验结果表明:较其他已有的虚通道路由器,SVS路由器在3种不同的故障情况下均较大地降低了延时,提高了吞吐量.这表明SVS路由器可有效提高系统可靠性,保证了系统性能,充分利用了可用资源.     

High-performance dispersant of coal–water slurry synthesized from wheat straw alkali lignin

Environmental concerns have stimulated interest in utilizing plant-derived materials in various industrial fields. The main objective of the present study was to synthesize a new type of high-performance lignin series dispersant of coal–water slurry (CWS) from wheat straw alkali lignin (WAL), and determine the affecting factors in the reaction and the application performance for CWS preparation. The experimental results showed that the inherent viscosity and the sulfonic group content of the modified wheat straw alkali lignin (MSL) are the key factors affecting its dispersing effect for CWS. In the reaction, the reactant mass concentration and the sulfonating agent amount were changed to obtain the MSL with different inherent viscosities and sulfonic group contents, and the MSL with intermediate inherent viscosity (6.0 ml/g) and higher sulfonic group content (1.80 mmol g^− 1) was found to have excellent dispersing effect for CWS. The MSL obtained from optimized process was used as dispersant for CWS preparation, the studies of the properties of CWS showed that MSL has similar dispersing effect with naphtalenesulfonate–formaldehyde condensate, and far better dispersing effect than lignosulphonate. Recently this kind of new dispersant has been applied in several power plants in China.     

塑料挤出机主辅电机联动系统设计

本文在分析国内外挤出机生产线主辅电机同步联调特点的基础上,提出了一种实用的联调控制系统设计方案,控制系统设计采用纯硬件方式,可以广泛适用于国内未采用同步联调技术的挤出生产线,进行技术改造,对原有设备改动极小,具有很高的性能/价格比。     

转炉钢渣的组成、矿物形貌及胶凝特性

借助XRD、SEM/EDAX、DTA等测试手段,对硅酸盐矿物含量低的转炉钢渣的组成、矿物形貌及水化产物进行了系统的研究,讨论了这种钢渣的胶凝特性及其应用途径。     

牙舟泥哨

牙舟泥哨作为民间陶制玩具在数百年的发展中逐渐形成了自己的风格和个性，在造型、审美上带有独特黔南地方特色。本文从造型和审美的角度对牙舟泥哨进行了分析。     

Experimental Study on the Hydrodynamics and Mass Transfer Characteristics of Ultrasonic Loop Airlift Reactor

The promoting effect of ultrasonic wave on the hydrodynamics and mass transfer characteristics of the loop airlift reactor was studied. The gas holdup, liquid circulation velocity, mixing time and overall volumetric mass transfer coefficient were examined and compared, with and without ultrasonic wave in the reactor. The experimental results show that ultrasound has almost no notable effect on the gas holdup, but has a tendency to decrease gradually the liquid circulation velocity and increase the overall volumetric mass transfer coefficient; and the effect on the mixing time is relatively complex. At low superficial gas velocity, the low powered ultrasound promotes the radial mixing of fluid; with the ultrasonic power increasing, ultrasonic vibration obstructs the axial mixing of fluid. Moreover, the effect of ultrasonic wave on the mixing time gradually decreases with the increase in the superficial gas velocity. Therefore there exists an optimal ultrasonic power for hydrodynamics and mass transfer. Correlations were also proposed for the hydrodynamics and mass transfer characteristics of the reactor.     

以数学建模为切入口的大学 公共数学课程教学改革

分析了公共数学课程在大学本科课程体系中的地位与作用,阐述了数学建模对培养提高大学生综合素质及其对大学数学课程教学改革的推动作用。     

液压仿真技术的应用与发展

本文在简单回顾液压仿真技术的发展之后,着重介绍了仿真技术及其在液压领域的应用,论述了液压建模与仿真技术的方法和几个关键问题,并从不同的侧面介绍了一些软件,最后综述了液压仿真技术未来的发展趋势。