钻井模拟器仿真

在钻井培训中采用仿真试验技术,大大缩短培训时间,减少费用,降低了风险。由于利用虚拟样机代替物理样机,也可以对钻井产品进行创新设计、测试和评估,缩短开发周期,降低成本,改进产品设计质量,提高面向客户与市场需求的能力。     

三维单片高频微波集成电路的封装技术

本文详细介绍了当前各种高频微波电路的封装模型，以及分析这些模型的场分析方法和分布网络分析方法。为了减少微波封装电路的插入和反射损耗，各种改进的加工技术被引入。     

制作圆片级封装凸焊点的垂直喷镀机研制

介绍了为满足微电子新颖封装——圆片级封装(WLP)在硅圆片上制作凸焊点的需要,根据有限元分析模拟优化,设计研制了FEP-1垂直喷镀机。该机可用于φ100-φ150mm(φ4-φ6英寸)圆片上电镀Au、PbSn、In等凸焊点。在150mm液晶显示驱动电路硅圆片上,用该电镀机电镀制作出了合格的高度为17μm、间距为20μm的金凸点。     

2.5D封装有机基板制造工艺研究

文章以一款实用高性能CPU的2.5D封装有机基板为研究对象,对有机基板制备的工艺流程、关键技术难点进行了详细实验和讨论,最终完成了合格样板的制作,并形成小批量产晶的生产能力。     

智能型通用水下自救释放系统

为了保障海洋探测设备的顺利回收,尽可能减少人员或财产的损失,利用GPS和GSM网络模块以及防水电磁铁等相关器件,设计了一种智能且通用的水下自救释放系统。旨在水下设备遇到危险时,自救释放器释放自救浮标,用于告警和定位水下设备,使其安全回收,也可用于水下工作人员或其他水下目标的水面定位。     

Preparation and characterization of the electrodeposited Cr-Al2O3/SiC composite coating

To increase the SiC content in Cr-based coatings, Cr-Al₂O₃/SiC composite coatings were plated in Cr(VI) baths which contained Al₂O₃-coated SiC powders. The Al₂O₃-coated SiC composite particles were synthesized by calcining the precursor prepared by heterogeneous deposition method. The transmission electron microscopy analysis of the particles showed that the nano-SiC particle was packaged by alumina. The zeta potential of the particles collected from the bath was up to +23 mV, a favorable condition for the co-deposition of the particles and chromium. Pulse current was used during the electrodeposition. Scanning Electron Microscopy (SEM) indicated that the coating was compact and combined well with the substrate. Energy dispersive X-ray analysis of Cr-Al₂O₃/SiC coatings demonstrated that the concentration of SiC in the coating reached about 2.5 wt.%. The corrosion behavior of the composite coating was studied by potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The data obtained suggested that the Al₂O₃/SiC particles significantly enhanced the corrosion resistance of the composite coating in 0.05 M HCl solution.     

填料硬度对环氧模塑料和封装体性能影响的研究

在环氧模塑料(EMC)各组分中,填料是最主要的成分之一,也是含量最高的组分,对生产设备和封装设备有很严重的磨损。通过研究,对设备的磨损将引入新的Fe3+,降低EMC和封装体的可靠性和操作性;而低硬度填料的EMC则具有良好的耐磨损性,有助于提高EMC的可靠性和操作性。     

高效率笔记本电脑核心电源

本文以BGA和PLMP两种封装为例，介绍了仙童半导体公司的新型封装。并与标准封装在电气性能和热性能方面进行了比较。同时给出了核心DCDC变换器的设计方法，并给出了实验结果。     

Stake-Invariant Belief

What can rational deliberation indicate about belief? Belief clearly influences deliberation. The principle that rational belief is stake-invariant rules out at least one way that deliberation might influence belief. The principle is widely, if implicitly, held in work on the epistemology of categorical belief, and it is built into the model of choice-guiding degrees of belief that comes to us from Ramsey and de Finetti. Criticisms of subjective probabilism include challenges to the assumption of additive values (the package principle) employed by defenses of probabilism. But the value-interaction phenomena often cited in such challenges are excluded by stake-invariance. A comparison with treatments of categorical belief suggests that the appeal to stake-invariance is not ad hoc. Whether or not to model belief as stake-invariant is a question not settled here.     

利用红外热象技术检测焊料烧接质量

本文叙述了利用AGA780红外热象仪检测国产F—4管壳焊料烧接质量的方法和结果,并指出这是一种很值得注意的方法。