无摩擦气缸活塞的结构变形分析

针对超低频悬挂装置刚体往复运动的无摩擦要求,设计了一套新颖的无摩擦气缸一活塞结构。建立了无摩擦气 缸一活塞应力计算模型,得到气缸和活塞结构应力计算公式。利用ANSYS Workhench建立无摩擦气缸一活塞的气膜仿真 计算模型,计算得到气膜沿活塞轴向的压力分布情况,利用单向流固耦合模块将气膜压力加载到无摩擦气缸一活塞上,基 于线性静力结构分析模块Static Structural计算无摩擦气缸一活塞应力和应变分布,对结果做出分析,对无摩擦气缸一活塞 结构不合理之处提出了解决方案。     

影响我国非农产业就业的三种效应分析

我国非农产业是拉动就业的主要部分,非农产业拉动就业可以划分为三种效应:增长效应、强度效应和结构效应。本文通过对我国改革开放以来三种非农就业效应的分析,得出发展经济是促进就业的主要手段和改善就业结构促进就业的结论,并提出大力发展第三产业促进劳动力市场一体化的政策建议。     

浙江对外贸易结构转换:从货物贸易到服务贸易

货物贸易和服务贸易是构成一国外贸不可或缺的两个有机组成部分,随着服务贸易在国际贸易中地位的不断上升,世界贸易结构正在发生深刻的变化.对1995年～2004年以来的浙江外贸发展分析表明,浙江服务贸易发展水平较低,处于竞争弱势,这与浙江货物贸易和总体经济发展状况极不相称.从战略意义看,实现浙江外贸结构从货物贸易到服务贸易的转换,逐步提高浙江服务贸易的国际竞争力,对于有效地参与国际分工,提高浙江的国际经济地位至关重要.     

供给侧结构性改革视角下中国科技成果转化绩效研究——基于空间面板数据模型的实证分析

通过构建科技成果转化的评价指标体系，文章采用至强有效前沿的最小距离法（mSBM）测度了中国1998-2016年各省份的科技成果转化绩效，并且在分析科技成果转化绩效空间相关性的基础上，结合供给侧结构性改革背景，使用空间面板数据模型实证考察了科技成果转化绩效的影响因素。结果表明：中国科技成果转化绩效呈现出明显的省际差异性，大多数东部沿海省份的科技成果转化绩效相对较高，而中西部内陆省份的科技成果转化绩效则不尽如人意；分地区看，东部地区的科技成果转化绩效最高，中部地区次之，西部地区最低；纳入空间效应后，科技成果转化绩效在不仅在全局空间上呈现出空间依赖性，而且在局部空间上表现出空间异质性，且大部分省份的科技成果转化绩效位于空间集聚区内，少量省份处于空间离群区内；空间计量模型结果显示，产业结构、金融结构、人力资本结构、经济发展水平、外商直接投资有效促进科技成果转化绩效提升，而产权结构和政府干预则对科技成果转化绩效表现出抑制作用。     

中国传统社会与国家同构状态探析

由于中国传统社会小农经济基础和宗法制度的制约作用 ,以及忽视个人权利、漠视经济利益的思想的影响 ,中国传统的国家与社会处于一种同构状态。社会被笼罩在国家之下 ,国家权力渗透到社会生活的各方面 ,政治领域的规则成为整个社会的游戏规则 ,政治权力成为主宰整个社会运行的指挥者。     

Structural unemployment. An analysis of recruitment and selection mechanisms based on panel data among Danish long-term unemployed

The perception of structural unemployment – summarised in the notion of 'Eurosclerosis'– became almost hegemonic during the 1990s. Policy makers all over Europe tried, by means of supply-side policies, to counteract the lack of incentives in the developed European welfare states, the lack of qualification on the post-industrial labour markets and the personal decay due to long-term unemployment. However, based on the critical case of Denmark, this article challenges the perception of structural unemployment and suggests an alternative business cycle/barrier perception. At the macro level it is difficult to explain the Danish decline in unemployment from 1994 to 2000 within the structure perception. The lack of explanatory power of the structure perception is further highlighted in micro-level analyses conducted on a panel study of long-term unemployed. Based on the unemployed's own assessments, we find no indications of supply-side problems. These results are supported by analyses of actual labour market integration of the long-term unemployed in the period between 1994 and 1999, which show that education level and previous unemployment had no noteworthy influence on labour market integration, whereas age had a decisive influence. These surprising results further undermine the perception of structural unemployment and the supply-side policies rooted in this 'mistaken' problem definition.     

Dynamic Financial Constraints: Distinguishing Mechanism Design From Exogenously Incomplete Regimes

We formulate and solve a range of dynamic models of constrained credit/insurance that allow for moral hazard and limited commitment. We compare them to full insurance and exogenously incomplete financial regimes (autarky, saving only, borrowing and lending in a single asset). We develop computational methods based on mechanism design, linear programming, and maximum likelihood to estimate, compare, and statistically test these alternative dynamic models with financial/information constraints. Our methods can use both cross‐sectional and panel data and allow for measurement error and unobserved heterogeneity. We estimate the models using data on Thai households running small businesses from two separate samples. We find that in the rural sample, the exogenously incomplete saving only and borrowing regimes provide the best fit using data on consumption, business assets, investment, and income. Family and other networks help consumption smoothing there, as in a moral hazard constrained regime. In contrast, in urban areas, we find mechanism design financial/information regimes that are decidedly less constrained, with the moral hazard model fitting best combined business and consumption data. We perform numerous robustness checks in both the Thai data and in Monte Carlo simulations and compare our maximum likelihood criterion with results from other metrics and data not used in the estimation. A prototypical counterfactual policy evaluation exercise using the estimation results is also featured.     

论《伤逝》的结构层次及其叙事策略

《伤逝》有三层悲剧性结构,相应地也有三层悖反性的结构意蕴;它们分别为读者探讨传统与反传统关系、女性解放以及思想启蒙者的自我反省自我解剖等问题提供了相应的思考平台;从而也使《伤逝》多方面的复杂意蕴共居于同一个小说文本。     

论外国文学电化教学过程结构模式与媒体选择组合

本文论述了普通高师外国文学电化教学中的一个重要问题，认为外国文学电化教学应采用“课堂播放教学法”，其教学过程结构模式应是“逻辑归纳型”和“逻辑实证型”，并以课堂实例论证了媒体的正确选择组合必须服从一个根本原则——“目的性原则”，认为这是优化外国文学电化教学过程的关键     

《离骚》结构的深层解析

关于《离骚》结构的研究,是一个颇具意义的学术课题。《离骚》主人公灵均经历了“四重境界”,全篇可以划分为四大段落。主人公的心灵历经四大阶段,最终将“心灵的力量”发挥到极致;而主人公在“四重境界”的活动,不仅符合形式逻辑的“因果律”,同时也符合辩证逻辑的“否定之否定定律”。但是,《离骚》主人公的情志变化的结局却是“悖反”的,这就使得《离骚》的结构成为一种“两难结构”,一种永远开放的结构:它使《离骚》获得永恒。