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：设计的液压输油管起重机是成品油船或化学品介质船用起重装置。一方面用作船舶货物的装卸、设备的吊运以及生活用品、救生艇的吊放等工作;另一方面用作同时装卸两种油品、化学品等液体介质,实现一机两用。在设计中将两根6″、8″金属管道布置在吊机内部,通过管接头、同心回转接头从底座立柱中伸到吊机顶部,再由旋转接头、管接头与吊臂内两根嵌入式金属管相连。套管同心回转接头和旋转接头的应用,使内部金属管自然的随吊机一起360°回转、(0°～70°)变幅,避免了金属管发生扭曲和拉伸变形,成功的将起重和输油综合为一体。

摘要：基于OBE理念进行高职《舞蹈》课程思政建设是实现高校价值引领的需要、凝心聚力的需求,有利于思政教育实现“软着陆”、完善舞蹈艺术中的德育环境。但在具体实践中,基于OBE理念的高职《舞蹈》课程思政建设仍面临重专业建设而轻价值引领、专业教学改革与思政教育“软着陆”难兼顾和课程思政建设机制难建构等现实挑战。基于OBE理念,通过合理设置教学目标与内容、设计创新教学方法、多措并举协同创新、实施多维互动考核,可以定义、助力、实现和评估预期学习产出,真正实现高职《舞蹈》课程思政的体系建构。

摘要：The paraventricular nucleus of the thalamus(PVT),which serves as a hub,receives dense projections from the medial prefrontal cortex(mPFC)and projects to the lateral division of central amygdala(CeL).The infralimbic(IL)cortex plays a crucial role in encoding and recalling fear extinction ***,we found that neurons in the PVT and IL were strongly activated during fear extinction *** PVT neurons inhibited extinction retrieval at recent time point(24 h after extinction),while activating them promoted extinction retrieval at remote time point(7 d after extinction),suggesting a critical role of the PVT in extinction *** the mPFC-PVT circuit,projections from IL rather than prelimbic cortex to the PVT were dominant,and disrupting the IL-PVT projection suppressed extinction ***,the axons of PVT neurons preferentially projected to the *** the PVT-CeL circuit also suppressed extinction ***,our findings reveal a new neural circuit for fear extinction retrieval outside the classical IL-amygdala circuit.

摘要：根据2003-2017年果洛州年降水量和牧草单产数据,选取降水距平百分率(Precipitation anomaly in percentage,PA)构建干旱指数(DI_(q)),采用Hodrick prescott filter(HP滤波)方法测算牧草趋势产量从而计算减产率(YLR_(q)),利用固定效应模型拟合牧草干旱指数与单产减产率的相关关系,最后构建损失率期望值模型,实现牧草干旱天气指数保险产品的设计,并厘定保险纯费率。结果表明:(1)果洛州牧草干旱致灾危险性呈东南向西北逐渐增加的空间分布特征,其中玛多县为干旱致灾危险性高值区,应重点加强干旱防范;(2)2003−2017年果洛州6个县牧草单产均呈波动上升趋势,其中班玛县牧草单产最高,15a平均单产为11126.67kg·hm^(−2);(3)果洛州牧草干旱指数(DI_(q))与减产率(YLR_(q))呈显著的线性相关关系,即YLR_(q)=0.311DI_(q)+0.035(P<0.050),干旱指数每增加一单位,牧草减产率增加0.311个百分点,当干旱指数为0时,其他因素导致牧草减产3.500%;(4)通过EasyFit软件筛选干旱指数概率分布最优模型,分别给出果洛州6个县牧草干旱指数的4种最优分布函数,即***模型、Error模型、Johnson SB模型和*** Value模型,且Anderson Darling(A−D)检验统计量均小于0.3。果洛州各县牧草轻旱、中旱、重旱与特旱发生概率分别处于8.750%~30.350%、13.000%~34.530%、0~13.790%和0~0.820%;(5)果洛州牧草干旱天气指数保险产品在100%保障水平下,6个县纯费率在2.259%~3.748%波动,西北部玛多县的纯费率最高,为3.748%,东南部达日县纯费率最低,为2.259%,牧草干旱天气指数保险纯费率呈东南向西北逐渐增大的空间分布格局。根据果洛州牧草空间分布及干旱情况,建议保险纯费率较高的玛多县、玛沁县等地区可作为试点先行县,制定差异化保费财政补贴政策。

摘要：In this study, seven pinned double-rectangular tube assembled buckling-restrained brace （DRT-ABRB） specimens were experimentally charaeterised by means of an axial cyclic test. The core member of the specimens was a single flat-plate. Two rectangular tubes were assembled using high strength bolts to form an external restraining member. Each rectangular tube was composed of an external steel channel and a cover plate. A gap or thin rubber filler was set between the core and the external restraining member to form an unbonded layer. The influence of several design parameters on the failure mode and energy dissipation capacity of the ABRB was investigated, including the height of the core wing plate, thickness of the external cover plate, and height of the external channel flange. This experimental study demonstrated that a local pressure-bearing failure at the end of the external member arises when the external cover plate is too thin or if the end construction detail is unreasonable. When the end rotations of the DRT-ABRB were restricted, the hysteretic performance was shown to be superior to that of a pure pinned DRT-ABRB. Finally, all the tested DRT-ABRBs exhibited excellent energy dissipation performance which amply satisfied existing regulation requirements.

摘要：对上海复兴东路越江公路隧道——近间距双线盾构隧道同向施工时相互影响的现场监测进行了研究。首先简要介绍了工程背景及其概况,然后介绍了为研究近间距盾构隧道相互影响而布设的监测项目,包括深层土体水平位移、地表沉降以及深层土体沉降、北线隧道三维位移、圆周变形、接缝宽度、北线隧道所受水土压力、北线隧道衬砌内力和土体中的超孔隙水压力。对监测数据进行了详细研究,得到了后建隧道推进时对地面沉降、深层土体位移变化、超孔隙水压力产生和消散、先建隧道衬砌位移、变形、内力的影响规律。从现场监测的分析结果来看,后进隧道对周围土体和先建隧道的影响是十分明显的。研究结果可以为大直径近间距双线推进的越江盾构隧道的设计和施工提供更加科学的指导。

摘要：该文设计了基于微电极阵列的16通道神经电生理信号检测系统。检测系统由硬件和软件两部分组成,其中硬件部分可分为以下3个模块:微电极阵列接口模块,用于实现微电极阵列和检测系统的可靠连接;多通道信号放大模块,用于对微弱电生理信号进行提取并放大至合适的幅度;数据采集模块,对放大后的电生理信号进行高速数据采集并通过USB2.0接口和计算机相连。软件部分采用多线程、多缓存等技术保证对信号的实时观测和分析。对检测系统的主要参数进行了测试,并结合实验室自制神经微电极阵列对SD大鼠海马区脑切片进行神经电生理信号的检测。系统的输入噪声Vrms<2μV,放大倍数为1000倍,频率带宽范围为10～3000 Hz,并且能够检测到放电幅度为20μV左右的神经电生理信号。该文针对微电极阵列神经电生理信号检测中的技术难点,从硬件和软件设计上保证微弱信号的提取,检测系统的分辨率可达0.6μV,各项参数能够满足神经电生理信号的检测需要。

摘要：以AD9218芯片为AD采集芯片、MCF56F8257 DSC为主控制器,设计了一款便携式的Qg测试仪,并给出了设计原理及实验结果.结果表明,该设计能准确测得Qg,同时也为同类参数测量提供参考.

摘要：点火线圈的装配是点火线圈生产过程中的重要一环,而点火线圈装配技术在国内发展迟缓,装配设备落后,严重制约点火线圈的批量生产,影响了点火线圈的质量。因此,设计一套点火线圈装配设备,对提高点火线圈的质量和装配效率有着重大的现实意义。首先根据某型号汽车点火线圈中的初、次级线圈、壳体的特征和设计要求,提出了装配系统的方案并进行了结构设计。其次,对重要部件建立刚柔耦合模型,利用ADAMS参数化分析中的设计研究方法,对装配过程中装配机构的下压力进行动力学分析,得出最佳下压力数值。利用ANSYS中对线圈施加最优下压力时的动载荷进行应力应变分析,得出线圈的最大应力应变点,校核了线圈骨架的强度。