摘要：The purpose of this study was to establish a method for measuring the knee valgus angle from the ana- tomical and mechanical axes on three-dimensional reconstruction imaging models, and to use this method for estimating an average knee valgus angle value for northern Chinese adults. Computed tomographic angiography data in DICOM format for 128 normal femurs from 64 adult subjects were chosen for analysis. After the femur images were subjected to three-dimensional reconstruction, the deepest point in the intercondylar notch （point A）, the midpoint of the medullary cavity 20 cm above the knee-joint line （point B）, and the landmark of the femoral head rotation center （point C） were identified on each three-dimensional model. The knee valgus angle was defined as the angle enclosed by the distal femoral anatomical axis （line AB） and the femoral mechanical axis （line AC）. The average （mean＋SD） of knee valgus angle for the 128 femurs was 6.20°±1.20° （range, 3.05° to 10.64°）. Significant positive correlations were found between the knee valgus angles of the right and left sides and between the knee valgus angle and age. During total knee arthroplasty, choosing a valgus cut angle of approximately 6° may achieve a good result in reestablishing the natural mechanical alignment of the lower extremity for patients of northern Chinese ethnicity. Larger valgus cut angles should be chosen for older patients.

摘要：Combination antiretroviral therapy(ART)reduced AIDS-related mortality and increased survival among patients living with HIV by interrupting HIV replication,enhancing immune recovery,and preventing the onset of opportunistic infections[1].In China,ART has rapidly been scaled up since the beginning of the National Free Antiretroviral Treatment Program(NFATP)in 2003[2].By the end of 2016,489,411 individuals diagnosed with HIV were receiving free antiretroviral treatment in *** is firmly committed to reducing overall AIDS-related mortality and HIV incidence within the ***,similar to other low-and middle-income countries,the NFATP is challenged by high mortality and attrition shortly after patients initiate ART[3].

摘要：The development of clean,sustainable and renewable energy storage systems is in urgent need with the fast-growing energy demand in the areas of electric vehicles and mobile electronics ***-ion batteries(LIBs)have been deemed to be the most promising energy storage devices for their high power density,long cycle life and fast charge-discharge rates[1].Transition

摘要：为提高机载电子设备的机械环境适应能力,对某机载电子设备机架的隔振缓冲系统设计进行研究。从隔振缓冲系统的基础理论出发,结合机架的实际要求目标进行仿真分析,提出一套将理论计算、仿真分析和试验验证等先进技术相结合的隔振缓冲系统设计方法和流程。经用某机架的试验验证,表明方法和流程合理,达到了设计目标,并节省了设计的时间和成本。可为类似机架在其它动态环境中应用时的设计作参考。

摘要：清廉文化作为一种精神现象和道德的教化值得传承与发扬,如何将廉洁的道德操守,通过润物细无声的方式渗透并转化为一种普遍的"廉荣贪耻"的价值观是值得研究的课题。文章基于诺曼的情感化设计理论,提出清廉文创设计的情感系统三层次,在对"清廉文化"进行设计解读的基础上,构建情感化三层次清廉文化设计原则与方法,并进行视觉、应用、品牌方面的实践,对清廉文化创意产品的具体设计与开发具有指导意义。

摘要：可变体头锥结构是改善空天飞行器气动性能的一种有效途径。为了实现空天飞行器对复杂环境的自适应性,本文基于伞式导杆机构设计了空天飞行器变体头锥结构,探讨了变体头锥的运动特性和运动平稳性。仿真分析了不同驱动方式下头锥变体过程中的运动学特性,得到了影响变体头锥工作性能和系统稳定性的主要因素。分析结果表明,所设计的变体头锥结构伸长量为1 499.6mm,偏转量为500.7mm,满足设计要求;与采用匀速运动模式相比,采用正弦运动规律驱动模式,基于伞式导杆机构的变体头锥具有较好的运动特性和运动平稳性。

摘要：为解决目前事故源项估算程序存在的只能估算某一单一事故、只能给出特定释放途径估算结果、需烦琐的预处理和专门的输入卡片等问题,开发一套依据事故序列和质能释放,模拟任意或叠加事故发生后任意包容体内放射性核素活度及向相连包容体活度释放率随事故进展变化的智能化事故源项估算(BP-ASTE)程序。以蒸汽发生器传热管破裂(SGTR)事故为例,描述BP-ASTE程序的构建与实现。

摘要：在复杂深空通信环境中，自适应能力的强弱对低密度奇偶校验（LDPC）码译码器能否保持长期稳定工作具有重要影响。该文通过对DVB—S2标准LDPC码译码器各功能模块的IP化设计，将动态自适应理论参数化映射到各功能模块中，实现动态自适应LDPC码译码器的设计。基于StratixIV系列FPGA的验证结果表明，动态自适应LDPC译码器可以满足不同码率码长及不同性能需求下的译码。同时，单译码通道可以保证译码数据信息吞吐率达到40．9-71．7Mbps。

摘要：为解决机械产品设计中知识融合的问题,建立了一种基于本体的产品设计知识模型。基于此,提出了一种基于模糊证据理论的融合推理方法,这种方法将模糊集引入证据识别空间中,利用证据合成与决策规则得出知识融合的结果,这种方法弥补了本体建模时的不足并解决了不确定性知识的推理。最后,将该知识模型应用于制造行业产品设计中,帮助制造企业缩短产品设计周期和提高开发质量,同时也有利于产品设计知识的共享和重用。

摘要：发展商用运输机标模是我国独立发展具有自主知识产权的先进民用飞机的重要支撑手段,对验证CFD技术和确认风洞试验品质具有重要意义。结合国内外主流宽体商业客机的布局特点和气动设计需求,基于自主开发的AMDEsign设计平台,设计研发了宽体客机标模CHN-T2。标模设计马赫数0.85,设计升力系数0.48。模型充分体现了主流宽体商用客机典型的双通道机身/超临界机翼/平立尾/翼吊通气短舱等几何特征,具有典型的部件间强干扰/激波分离/转捩等流场特征以及优异的高亚声速巡航/高升阻比气动效率等性能特征。通过气动外形优化设计、短舱吊挂组件影响及雷诺数效应等研究,并结合风洞试验数据对比分析,最终确认CHN-T2模型巡航升阻比达到21.8、阻力发散马赫数约为0.872、抖振边界大于1.3倍巡航升力系数、风洞试验准雷诺数为3×10^(7)。研究认为,CHN-T2模型具有良好的气动性能,能够作为先进宽体客机气动标模进行应用推广。通过持续建立的丰富气动数据库和流场影像,可有力支撑宽体客机流动机理分析、CFD技术验证与确认、先进风洞试验技术发展验证、CFD与风洞数据相关性等研究。