摘要：Objective:Mental disorders of the elderly population in China deserve *** health is significantly associated with *** study aimed to evaluate the rate of depressive symptoms and to test the relationships between social health and depressive symptoms among a large sample of community-dwelling elderly ***:We conducted a cross-sectional study among community-dwelling adults aged 60 years or above in Zhejiang Province,***-to-face interviews were used to complete a structured questionnaire for all *** used the Social Health Scale for the Elderly(SHSE)to evaluate social health status and used the short form of the Geriatric Depression Scale to evaluate depressive *** logistic regression was used to evaluate the asso?ciation between social health status and depressive ***:Of the total of 3757 participants included,1887(50.23%)were female,and the mean±standard deviation(SD)age was(70.0±8.3)*** rate of depressive symptoms was 25.92%.The social health score was higher in non?depressed participants than in depressed participants(raw score 50.7 vs.48.3,P<0.001).Participants with"moderate”or"good”social health had a significantly lower risk of depressive symptoms than those with“poor"social health(odds ratio(OR)=0.55,95%con fide nee interval(Cl):0.46-0.66 for moderate social health;OR=0.45,95%Cl:0.35-0.60 for good social health).The association between social health and depressive symptoms was con sistent across several *** clusi ons:Social health is signify cantly inversely associated with depressive *** SHSE may serve as an efficient screener to identify those elderly adults with social health deficits,but systematic assessment to guide intervention merits further investigation.

摘要：斜拉桥塔柱计算长度的取值是验算其承载能力极限状态的关键问题。基于斜拉桥中拉索对桥面梁起弹性支撑作用的受力特点,针对刚构体系斜拉桥塔柱计算长度取值问题提出了一个新方法和力学模型,即传递矩阵法和三梁离散弹簧模型。该模型将塔柱和主梁视为考虑轴向变形影响的欧拉伯努利梁,将斜拉索简化为有质量的弹簧。利用传递矩阵法进行求解,通过考虑边界条件以及连续性条件,推导出系统的稳定特征方程,进而得出塔柱面内稳定计算长度系数。最后,通过算例分析和有限元计算结果的对比,验证了该文中所提出的理论和方法的可行性,能够满足刚构体系独塔斜拉桥计算分析和塔柱计算长度评估的需要。

摘要：为研究大直径钢筋装配式混凝土框架抗震性能,对三层两跨大直径钢筋装配式混凝土足尺框架进行拟动力试验,分析框架在地震设防三标准下的破坏形态、动力时程反应及抗震性能指标。研究结果表明:多遇地震作用下,框架并未出现裂缝,处于弹性状态;设防地震作用下,框架出现微裂缝,试验结束时裂缝闭合;罕遇地震作用后,框架进入弹塑性状态。以承载力和残余变形确定使用性能时,多遇地震作用下达到抗震性能3(完好);设防地震作用下,达到抗震性能4(轻到中等破坏);罕遇地震作用下,达到抗震性能4(不严重破坏);各地震工况下,框架底部剪力-层间位移角曲线基本呈线性,具有较好的滞回性能;罕遇地震后,柱主筋均未屈服,一、二层梁端主筋屈服,实现了“强柱弱梁”的设计目标。同时,对大直径钢筋框架和普通直径钢筋框架进行有限元对比分析,两者各层层间位移以及层间剪力均值相对误差分别为-5.73%和-1.41%,动力性能接近。

摘要：It is generally believed that the initiative in the interdisciplinary study of literature and economy comes from the literary world,and The Great Gatsby by the American author *** Fitzgerald is a case in *** novel narrates the experience of Americans’pursuit of the American Dream in the 1920s,truthfully reflecting the economic and social conditions at that *** paper analyses the economic dynamics and consumer culture represented in the *** approaches the prevailing consumer culture and the American Dream motif from the perspectives of money,status and *** also examines how automobiles,as a new means of transportation,meet the needs of post-WWI Americans for efficient travel and conspicuous consumption.

摘要：The effects of Sn content on microstructure and tensile properties of as-cast and as-extruded Mg-8Li-3Al-(1,2,3)Sn(wt.%)alloys were investigated by X-ray diffractometry(XRD),optical microscopy(OM),scanning electron microscopy(SEM)and tensile *** is found that,as-cast Mg-8Li-3Al-(1,2,3)Sn alloys consist ofα-Mg+β-Li duplex matrix,MgLiAl2 and Li2Mg Sn *** Sn content leads to grain refinement ofα-Mg dendrites and increase in content of Li2MgSn *** hot extrusion,complete dynamic recrystallization(DRX)takes place inβ-Li phase while incomplete DRX takes place inα-Mg *** Sn content is increased,the volume fraction of DRXedα-Mg grains is increased and the average grain size of DRXedα-Mg grains is *** Sn content is beneficial to strength but harmful to ductility for as-cast Mg-8Li-3Al-(1,2,3)Sn *** properties of Mg-8Li-3Al-(1,2,3)Sn alloys are improved significantly via hot extrusion and Mg-8Li-3Al-2Sn alloy exhibits the best tensile properties.

摘要：Cryptocurrencies represented by Bitcoin have fully demonstrated their advantages and great potential in payment and monetary systems during the last *** mining pool,which is considered the source of Bitcoin,is the cornerstone of market *** surveillance of the mining pool can help regulators effectively assess the overall health of Bitcoin and ***,the anonymity of mining-pool miners and the difficulty of analyzing large numbers of transactions limit in-depth *** is also a challenge to achieve intuitive and comprehensive monitoring of multi-source heterogeneous *** this study,we present SuPoolVisor,an interactive visual analytics system that supports surveillance of the mining pool and de-anonymization by visual *** is divided into pool level and address *** the pool level,we use a sorted stream graph to illustrate the evolution of computing power of pools over time,and glyphs are designed in two other views to demonstrate the influence scope of the mining pool and the migration of pool *** the address level,we use a force-directed graph and a massive sequence view to present the dynamic address network in the mining ***,these two views,together with the Radviz view,support an iterative visual reasoning process for de-anonymization of pool members and provide interactions for cross-view analysis and identity *** and usability of SuPoolVisor are demonstrated using three cases,in which we cooperate closely with experts in this field.

摘要：The effects of annealing treatments(ATs)on the microstructure of Zr-Sn-Nb alloy strips were *** on the characteristics of strips for nuclear fuel assemblies,punching experiments were carried out and the formability of zirconium alloy strips was quantitatively *** results indicate that the proportions of small-angle grain boundaries of the zirconium alloy under conditions of annealing treatment at 580°C(ATⅠ)and annealing treatment at 620°C(ATⅡ)are 14.3%and 23.2%,respectively,while that of the as-received material is 12.4%.And the forming limit margin fields of the zirconium alloy under ATⅠcan reach 0.43%,while the values of the as-received material and the ATⅡare-0.35%and-2.8%,*** annealing process affects the evolution process of the strip recrystallization texture and the grain ***,the total texture and pole density are closely related to the degree of anisotropy of the ***,the small-angle grain boundary affects the strain path and crack expansion of the necking unit during the strip punching process,while the grain size affects the hardening exponent of the material.

摘要：为研究CFRP碳纤维增强复合材料粘结型锚具的受力性能及其设计参数对锚固效率的影响,寻求较优的锚具设计参数取值范围,本研究首先采用有限元方法,通过引入锚固效率的概念,研究了单孔直筒+内锥粘结型锚具的力学性能及索股径向应力和位移分布规律.然后,以锚固效率和等效刚度为考察指标,改变锚具及索股参数,分析了锚具总长度、粘胶介质弹性模量、直筒段长度、内锥角大小、胶体厚度、索股直径参数对锚固效率及等效刚度的影响规律.结果显示:锚具总长度宜取为12~16倍CFRP索股直径;粘结胶弹性模量取1.5~3.0 GPa;直筒段长度取为总长度的1/6~1/2之间;内锥角取4°~5°;胶体厚度取CFRP筋直径的0.3~0.5倍;索股直径取值宜小于90 mm.在建议参数取值下,单孔直筒+内锥粘结型锚具的锚固效率将达到90%,甚至95%以上.因此,合理优化相关设计参数能较好地提高其锚固效率和刚度.

摘要：动漫会展作为动漫产业创新发展的润滑剂显示出了其良好的平台作用。同样,动漫产业的创新发展也对我国动漫会展的功能和形式提出了更高的要求。面临目前我国动漫会展业的一些组织功能发挥不够、内容及模式雷同、举办连续性不可持续、缺乏区域协调、与动漫产业创新互动机制缺乏等问题,提出了几点建议:明确动漫会展的功能和定位,结合产业实际和优势,注重举办方和行业协会的协调沟通,建立会展审查的机制以消除会展举办的乱像,充分发挥线上会展的时空延伸性,突出会展特色和会展活动创新以助推动漫产业的持续创新发展。

摘要：雷击会对风电机组造成严重损坏,是影响风场安全运行的主要因素。在雷击过程中,雷电流流经塔体,并通过电磁场的耦合作用,在塔体内部三相电缆和机组变压器上产生雷电过电压,影响内部设备的正常运行。通过电磁暂态软件PSCAD搭建了比较全面的风电机组模型,对风电机组的暂态过电压进行计算分析,并研究了不同大小的接地电阻以及不同接地方式对风电机组过电压分布的影响。计算结果表明良好的接地系统有利于降低电缆上的过电压,但不能改变塔体上过电压的最大值,而接地方式的不同对过电压影响巨大,两种接地方式各有优劣。最后为风电机组加入避雷器,验证了防雷设计的有效性,仿真结果为风电机组的安全、经济的防雷设计提供了参考依据。