基于蒙特卡罗模拟的费用与进度集成风险分析——项目风险分析系列论文（二）

基于蒙特卡罗模拟的费用与进度集成风险分析,可以获得更为精确的费用估算结果,同时得到进度风险分析的结果,使得风险分析的应对措施可以针对时间类与费用类风险采取不同的措施.笔者结合国外相关文献的成果,讨论并分析了采用蒙特卡罗模拟的费用与进度集成风险分析的顺序分析程序与一体化分析程序两种分析方法及其特点,并依据讨论结果推荐优先选用顺序分析程序.     

A study on UV-curable coatings for HD-DVD: Primer and top coats

This study relates to the development of coatings for optical discs in high-density digital versatile disc systems (HD-DVD or blue lay disk) that use a high numerical aperture of 0.85 at 405 nm wavelength and have a protective top layer over a primer layer for protection against damage and dust. Ultraviolet-curable raw materials of two acrylic monofunctional monomers ( isobornylacrylate, IBA and tetrahydrofurfurylacrylate, THFA) and two kinds of urethaneacrylate oligomers (OUMD and OUME) have been easily mixed with photoinitiators. Curing rate of these materials was characterized by FT-IR. In case of top coats, VTES (vinyltriethoxysilane) and acrylic acid were added to enhance the abrasion resistance. These two kinds of UV-curable resinous materials having no solvent were synthesized and investigated as means for making a blue ray disk having good optical and mechanical properties. In addition, dynamic characteristics including reflectivity, fluctuation of RF signal and noise level were also investigated.     

新型QPG1×8000-85型启闭机的研究

通过对启闭机关键部件卷筒的受力分析,研制出一种新的单吊点、双驱动、超大容量、高扬程启闭机.从理论上分析了它的整体工作性能.所依托工程的使用情况表明,该机达到了设计要求.     

秦岭造山带（陕西部分）中新生代陆内造山及与矿产关系

印支运动后的秦岭造山带受古亚洲构造域、环太平洋构造域和特题斯三大构造域联合作用，发生了强烈的陆内造山，奠定了该区条块相间构造岩片系统的基本构造格架，控制了本区斑岩型钼矿和众多热液型多金属矿产的最终成矿作用和矿带展布。     

Power-handling capability for RF filters

A simplified method for evaluating the power-handling capability inside an RF filter has been introduced based on the general cross-coupled prototype network theory, modern EM modeling techniques, and well-established breakdown threshold analysis. The electrical field strength and voltages evaluated using either the single-cavity resonator (eigen mode) model or simply the prototype model have been presented and compared against the direct EM computation of the complete filter structure. Close agreement has been found between the full EM modeling and the scaling of a single resonator or even prototype network analysis only. This procedure is expected to simplify the multipaction and ionization breakdown analysis of filters and filter-based diplexers and multiplexers. The method presented is general and is applicable to all filter types that can be described in a circuit model. Practical issues such as the multicarrier operation, sharp edge condition, design margin, and prevention techniques are also covered.     

埕东油田埕913断块沙三段砂砾岩油藏储层特征研究

以井点分析为基础，利用棱磁共振测井等资料，对埕东油田埕913断块沙三段储层岩石进行分类；应用岩石铸体薄片、扫描电镜、压汞、CT等资料，以砂砾岩储层孔隙结构特征为重点，对其储层特征进行了研究。通过CT分析，确定了储层孔隙度，为落实储量规模提供了依据。     

Reduction kinetics of Fe<Subscript>2</Subscript>MoO<Subscript>4</Subscript> fine powder by hydrogen in a fluidized bed

Iron molybdate (Fe₂MoO₄) powders with an average particle size of 100 μm were reduced by hydrogen using a fluidized-bed batch reactor in the temperature range of 923 to 1173 K. The extent of the reaction was followed as a function of time by gas chromatography. The fluidizing-gas velocity was set at about 1.5 times the minimum fluidization velocity. The ratio of the height of the static bed to its diameter is about 1. Under the prevailing experimental conditions, it was found that the chemical reaction was the rate-controlling factor. The activation energy for this process was 158±17 kJ/mol. The crystal size of the Fe₂Mo powder produced at lower temperatures was in the nanometer range, indicating the possibility of mass production of alloys and intermetallics in the nanorange, using a fluidized bed.     

利用手机模块实现无线公话的方法研究

本文论述了无线公话技术的实现原理，详细介绍了利用MCS8051系列单片机控制手机模块实现无线公话的方法，并给出了该类设备硬件各模块的功能描述以及关键部分软件的实现方法。