Car side window kinematics

It is a demanding and time-consuming task to construct the side window mechanism of a car such that the deflections along the seals are minimized. The reason for this is that the window surface S delivered by the stylist, will in general not be movable in a proper way: It is required that the surface tightly moves along the seals. Deflections will necessarily occur no matter how much effort the engineer invests. This article describes how to find a spatial motion that minimizes seal deflection for some given automobile side window surface. Necessary but acceptable modification of the stylist’s surface S is also addressed, as well as the lifting mechanism design. It is argued that our systematic approach offers considerable savings compared to the prevailing trial-and-error approach.     

手征等离子体波导导波控制特性的研究

应用纵向分量法推导出了完全填充手征等离子体金属圆波导的色散方程。通过数值求解完全填充手征等离子体金属圆波导的色散方程,得出了在不同条件下的几个低阶模的模式色散图。由此分析讨论了手征等离子体金属圆波导的基本传播特性并着重分析了手征导纳和外偏置磁场对完全填充手征等离子体金属圆波导的导波特性的影响并获得了有意义的结果。     

50～75 MHz 1200 W脉冲功率LDMOS器件的研制

分析了工作于甚高频(VHF)频段的千瓦级横向扩散金属氧化物半导体(LDMOS)器件的输出功率、漏极效率及功率增益等关键参数在设计时应考虑的因素,在此基础上,采用0.8 μm LDMOS工艺成功研制了一款工作于VHF频段的脉冲大功率硅LDMOS场效应晶体管(LDMOSFET).设计了用于50～ 75 MHz频带的宽带匹配电路.研制的器件击穿电压为130 V.在工作电压为50 V,工作脉宽为1 ms,占空比为30％的工作条件下测试得到,器件的带内输出功率大于1 200 W,功率增益大于20 dB,漏极效率大于65％,抗驻波比大于10∶1.     

Dosage individualization of erythropoietin using a profile-dependent support vector regression

The external administration of recombinant human erythropoietin is the chosen treatment for those patients with secondary anemia due to chronic renal failure in periodic hemodialysis. The objective of this paper is to carry out an individualized prediction of the EPO dosage to be administered to those patients. The high cost of this medication, its side-effects and the phenomenon of potential resistance which some individuals suffer all justify the need for a model which is capable of optimizing dosage individualization. A group of 110 patients and several patient factors were used to develop the models. The support vector regressor (SVR) is benchmarked with the classical multilayer perceptron (MLP) and the Autoregressive Conditional Heteroskedasticity (ARCH) model. We introduce a priori knowledge by relaxing or tightening the epsilon-insensitive region and the penalization parameter depending on the time period of the patients' follow-up. The so-called profile-dependent SVR (PD-SVR) improves results of the standard SVR method and the MLP. We perform sensitivity analysis on the MLP and inspect the distribution of the support vectors in the input and feature spaces in order to gain knowledge about the problem.     

水热法KTP倍频转换效率性能的研究

首次报道了水热法KTP倍频转换效率性能的研究,通过研究水热法KTP的电子显微镜照片,分析了水热法KTP内部的缺陷;通过理论和实验,研究了水热法KTP晶体的倍频转换效率,两者的高转换效率时的温度相同;通过选择合适的控制温度,在抽运功率为6.11W时,绿光输出为0.7W,继续加大抽运功率,输出绿光的增加幅度都在加大,此时的光-光转化效率是11.5%.     

LTE-Advanced下行链路多天线技术研究

分析了下行链路中的参考符号结构,描述了码本设计的工作原理,验证了下行链路多天线增强方案的系统性能,最后预测了LTE-AdvancedR11中LTE-Advanced下行链路多天线技术的发展趋势。     

等离子蚀刻挠性PI基材制作悬空引线及其参数优化

悬空引线的制作是挠性印制线路板制作的难点之一,需要在基材的某些区域蚀刻掉PI（聚酰亚胺）基材来满足设计的要求。目前采用的在基材上开窗口的方法有机械冲切、数控铣、化学试剂蚀刻法和等离子蚀刻法等。其中,等离子蚀刻法加工精度高、操作简便、清洁环保,但由于运行成本相对较高使其生产应用受到了限制。本文通过正交设计试验优化等离子蚀刻PI的参数,以达到充分利用气体、缩短等离子蚀刻时间的目的,从而大大降低等离子蚀刻过程的成本。并最终完成悬空引线的制作。     

TD-SCDMA标准化进展

依据演进次序，从3GPP R99、3GPP R4、3GPP R5、3GPP R6和3GPP R7五个方面对TD-SCDMA系列标准进行了概括的介绍，并对各标准的主要特点和新增功能进行了概述。     

ZnO纳米棒的低温生长及光致发光性能

采用化学溶液沉积法在ITO导电玻璃上制备近一维ZnO纳米棒.利用X射线衍射(XRD)、扫描电子显微镜(SEM)和光致发光谱(PL)对样品进行表征,研究了不同Zn2+摩尔浓度和不同生长时间对样品的结构、形貌和光致发光性能的影响.结果表明,所制备的ZnO纳米棒为纤锌矿结构并沿c轴择优取向生长.另外,随着Zn2+摩尔浓度的增加,纳米棒的直径增大.当Zn2+摩尔浓度为0.1M时,ZnO纳米棒的直径和长度都随生长时间的增加而增加.PL测试表明,样品均具有良好的发光性能,并且ZnO纳米棒的结晶质量随着Zn2+摩尔浓度和生长时间的增加均有所提高.