编码解码芯片HD3-6408-9及其应用

编码解码芯片HD3 64 0 8 9是一种高性能的CMOS器件。这种大规模芯片主要由编码器和解码器两部分组成。在数据传输应用中 ,采用两个独立的单片机系统 ,利用编码解码芯片 (HD3 64 0 8 9)组成数字信号的接收、发送及显示部分来完成数据传输功能     

AutoCAD 下非结构网格自动生成

在AutoCAD环境下，从背景网格生成和数据结构两方面对推进阵面法进行修正。采用修理后的方法，使得在流场、泥沙输移和床面冲淤数值计算的前处理过程中无须精心预设内部控制点而只需给边界一个尺度，就能自动生成适应任意复杂边界的非结构网格，从而提高网格生成、优化的效率和通用性。     

The Synthesis of Sulfated Titanium Oxide Nanotubes

TiO₂ nanotubes can be prepared in gram quantities by treating anatase TiO₂ powder with concentrated NaOH solution. These TiO₂ nanotubes acquired strong acidity after being impregnated with sulfuric acid solution and calcined at 300 °C. The anatase TiO₂ powder used to prepare the nanotube did not catalyze the esterification between cyclohexanol and acetic acid, while sulfated TiO₂ nanotubes were very reactive toward the esterification reaction.     

An EM‐based adaptive multiple target tracking filter

Tracking targets of interest is one of the major research areas in radar surveillance systems. We formulate the problem as incomplete data estimation and apply EM to the MAP estimate. The resulting filter has a recursive structure analogous to the Kalman filter. The advantage is that the measurement‐update deals with multiple measurements in parallel and the parameter‐update estimates the system parameters on the fly. Experiments tracking separate targets in parallel show that tracking maintenance ratio of the proposed system is better than that of NNF and RMS position error is smaller than that of PDAF. Also, the system parameters are correctly obtained even from incorrect initial values. Copyright © 2001 John Wiley & Sons, Ltd.     

探讨缩聚催化剂对聚酯切片质量的影响

通过试验，分析比较了江西Sb2O3、南宁Sb2O3和大连Sb(Ac)3三种缩聚催化剂对聚酯切片质量的影响。试验结果表明，Sb(Ac)3是优良的缩聚催化剂。     

Monoacylglycerols derived from butter oil by Penicillium roquefortii in suspension cultures

Structural isomers of monoacylglycerols (monoglycerides, MAGs) were identified and compared after degradation of butter oil by two strains of Penicillium roquefortii and a commercial lipase from P roquefortii (EC 3.1.1.3) at pH 7.0 and 10 °C. The conditions were selected as they were comparable with those used in the manufacture of blue mould‐ripened cheese. The commercial lipase was selected to compare with the fungal strains in terms of acyl migration. Results showed that the main isomers formed by lipolysis with the commercial lipase were sn‐2 MAGs (64 mol%), whilst spores and emerging mycelia of P roquefortii produced mainly sn‐1(3) MAGs (83–90 mol%). The work reported here may lead to further assessment of different MAG structural isomers as natural preservatives in foods and dairy products. © 2002 Society of Chemical Industry     

舰船水声隐身技术(二)

本文探讨了水声隐身性能对舰船战技术性能的影响 ,舰船水噪声的主要噪声源、水噪声的治理措施及其展望。     

关于化粪池几个问题的探讨

探讨化粪池在设计布置及使用管理中应注意的几个问题，以充分发挥化粪池在保护环境，减轻污染方面的作用。     

谈公务员腐败产生的根源

结合实际,从经济、政治、历史文化、主观心理、技术及国外影响等方面分析了公务员腐败产生的根源。