摘要：Background:Handan Eye Study (HES),a large population-based cohort study in rural area of northern China,was one of the few studies focusing on the major eye diseases of rural Chinese *** aim of this study was to introduce the design,methodology and to assess the data quality of the follow-up phase of ***:All participants were recruited in Yongnian county of Handan city between 2012 and *** outcomes were measured by visual quality scales and ocular *** performed the Chi-square test to make comparison of categorical data among groups,One-way analysis of variance and Kruskal-Wallis test was applied to make comparison of continuous data among groups,a post-hoc test was done to make further pairwise ***-class correlation coefficients (ICCs) and Kappa coefficients were used to evaluate the consistency between different *** regression was used to explore the influence factors of death,odds ratio (OR) and 95% confidence interval (CI) were used to estimate the effect size of each influence ***:The follow-up rate was 85.3%.Subjects were classified into three groups:the follow-up group (n =5394),the loss to follow-up group (n =929),and the dead group (n =507),comparison of their baseline information was *** with the other two groups,age of the dead group (66.52 ± 10.31 years) was the oldest (Z =651.293,P < 0.001),male proportion was the highest (59.0 %)(x2 =42.351,P < 0.001),only 65.9 % of the dead finished middle school education (Z =205.354,P < 0.001).The marriage percentage,body mass index (BMI),best-corrected visual acuity (BCVA),and intra-ocular pressure of the dead group was the lowest *** equivalent error (SER) of the dead group was the ***,history of smoking,hypertension,diabetes,and heart disease were more common in the dead *** analysis showed that age (OR =1.901,95% CI:1.074-1.108),gender (OR =0.317,95% CI:0.224-0.448),and BCVA (OR =0.282,95%

摘要：本文从网络设计的总体目标出发，从三个方面讨论了路由器设备的选型策略。首先从路由协议、路由设备的互操作性等方面探讨了路由设备选型的功能因素。然后从可靠性、可维护性、吞吐量指标、延时指标等方面探讨了路由器设备选型的性能因素。最后从配置参数、配置方式和扩展接口等方面探讨了路由器设备选型的灵活性因素。

摘要：为满足现代空战中协同作战的需求,结合武器装备现状,依据高层体系结构(HLA)开发步骤,建立联邦目标和概念模型,设计并开发联邦,给出实现方法,构建航空武器协同作战分布式交互仿真系统,旨在为航空武器装备技术研究提供良好试验平台和模拟训练环境。

摘要：通过比较９６系列单片机ＩＮＳＴ引脚与５１系列单片机ＰＳＥＮ引脚不同功能，提出了扩展９６系列单片机外部存储空间的两种方法：设置“共用区”和扩展地址总线。这两种方法的实现手段和扩展效果均有所不同，本文结合具体使用，就其优缺点进行了讨论。作者在自己设计的系统中将这两种扩展方法结合使用，取得了较为满意的效果。

摘要：针对冶金自备电厂燃料热值、压力和负荷多变的复杂工况与发电机组燃烧、汽机系统存在的大滞后、扰动大、多变量问题,首先通过改进粒子群算法(improved particle swarm optimization,IPSO)辨识得到以汽轮机调节阀开度与燃料量为控制量、有功功率与主蒸汽压力为被控量的单元机组数学模型;其次,设计多变量动态矩阵控制策略,构建机炉协调控制器,通过在线预测、反馈校正实现对系统进行滚动优化,并转换为内模控制结构分析其动态特性;最后,得到基于多变量动态矩阵控制(multivariable dynamic matrix control,MDMC)的燃气发电机组机炉协调控制策略。研究结果表明:相较于常规PSO,IPSO输出曲线拟合效果具有更高的准确性;与模型预测控制、广义预测控制、比例积分微分控制相比,MDMC具有更好的抗干扰性和动态性能,系统在受到干扰时调节时间最短为112 s,超调量仅为1.81%。应用机炉协调控制系统后,有功功率与主蒸汽压力标准偏差分别降低48.03%和33.33%,在满足现场设计要求的同时更有利于工业生产。

摘要：针对工业过程中故障发生源与故障信息在传播过程中的差异性问题,提出了一种基于不同故障传播路径差异化(Fault propagation path-aware network,FPPAN)的故障诊断方法.该方法分别从故障源邻域信息关系和故障信息传播两个角度出发,设计了基于k近邻筛选(k-nearest-neighbor,k-NN)和基于剪枝的k跳可达路径选择(Pruning-based k-hop reachable path selection,k-PHop)的两种故障源图的构建方式,构建“故障源图”.从故障在变量间的差异化表现着手,将基于特征的分类问题转换为基于结构关系的图匹配问题,利用该结构化信息优化过程特征,提升模型故障诊断性能.最后,通过田纳西−伊斯曼(Tennessee-Eastman,TE)过程和某海底盾构掘进施工过程进行仿真验证,实验结果证明了所提方法的有效性.

摘要：A series of novel 5-（trifluoromethyl）-1H-pyrazole-4-carboxamide derivatives（6a–6n, 7a, 7b, and 8a-8f）were synthesised by placing the amide bond at the 4-position of the pyrazole ring. These derivatives differed from the structure of chlorantraniliprole analogues with the amide bond at the 5-position of the pyrazole ring. Preliminary bioassay results revealed that a few title compounds exhibited good insecticidal activities against lepidopteran pests, such as Plutella xylostella, Mythimna separate, Heliothis armigera, and Ostrinia nubilalis. Some title compounds also elicited broad-spectrum insecticidal activities against dipterous insects including Culex pipiens pallens after altering the amide position. Similar to pyrazole-5-carboxamide analogues, compounds 6b and 6e showed 100% insecticidal activity against P. xylostella, C. pipiens pallens, and M. separate at concentrations of 200, 2, and 200 mg/m L, *** finding suggested that 5-（trifluoromethyl）-1H-pyrazole-4-carboxamide derivatives are potential alternative insecticides for management of agriculture pests.

摘要：Bio-nanochannels in living organisms participate in the physiological activities by selectively transporting ions through cell *** structure and function of biological ion channels inspire the development of artificial ion nanochannels with practical *** bioinspired nanochannels based on polymer materials present good mechanical stability,high-performance ion transport and designability,which have attracted much *** this review,we mainly focus on the fabrication and application of polymer-based biomimetic nanochannels especially in environmentally responsive biosensor and energy *** firstly introduce the basic understanding of nanochannels in ion regulation and osmotic energy ***,we discuss the fabrication methods of polymer-based nanochannels and highlight their advantages compared with other *** practical applications of polymer-based biomimetic nanochannels,especially in energy conversion and environmentally responsive biosensor,are detailedly ***,we summarize the unsolved problems in bioinspired nanochannels and overview the further developing direction in this field.

摘要：雷达罩多采用单层结构设计,但是其工作带宽较窄,难以适应宽频段的透波要求。对于大入射角情况下的透波要求,单层结构设计更是难以满足要求。随着雷达导引头的工作频率逐渐加宽,以及雷达导引头的宽扫描角要求,单层结构设计的雷达罩越来越难以满足要求。为了适应宽频带的透波要求,该文从介质平板透波性能分析出发,推导出多层介质平板的透波性能,并利用粒子群算法,设计出相应的优化适应度函数和目标函数。对多层介质平板的厚度在多频点、多入射角条件下进行优化设计,得出了可以满足宽频带、大入射角透波要求的多层介质平板结构。

摘要：为有效提升下肢外骨骼设计过程中机会把握、需求提取和技术实施的可行性,以及患者需求的满意度,提出一种用户需求导向融合模型,为设计下肢外骨骼产品提供指导。在该融合模型框架下,通过社会-经济-技术分析模式对潜在市场机会进行定位;结合层次分析法提炼用户核心需求并计算权重;通过质量功能展开法分析存在于工程因素间的矛盾;利用发明问题解决理论描述、判别并解决上述矛盾,并转化为设计建议。得到3对技术矛盾和对应的3种解决方式,运用融合模型法实现了下肢外骨骼的创新设计,从多理论融合的角度为用户需求的满足提供了新思路。