基于ANSYS Workbench的某轿车车身刚度研究

利用Catia软件对某轿车车身的三维模型进行简化,导入到ANSYS Workbench中,对车身进行前置处理并检查有限元网格划分质量。模拟仿真车身弯曲和扭转工况,计算车身相应刚度值、应力分布和车身开口处对角线变化值。分析仿真结果表明该车车身的弯曲刚度和扭转刚度都有一定的不足,但车身开口对角线变形量在标准范围内,为整车的改进设计提供了参考。     

试论阿以战争中的大国干预

大国干预地区事务体现在大国之间的横向互动以及大国与地区国家之间的纵向互动。大国干预具有制衡性、非对称性及强制性等特征,体现了大国干预的复杂动态过程。本文在叙述大国干预阿以战争的基础上,发现安全利益、威胁认知、文化认同等因素影响着大国干预地区事务的动机。当前巴以冲突中大国干预的影响依旧存在,且对阿以和平以及中东安全具有重要的历史和现实意义。     

Incrementing Bipartite Digraph Edge-Connectivity

This paper solves the problem of increasing the edge-connectivity of a bipartite digraph by adding the smallest number of new edges that preserve bipartiteness. A natural application arises when we wish to reinforce a 2-dimensional square grid framework with cables. We actually solve the more general problem of covering a crossing family of sets with the smallest number of directed edges, where each new edge must join the blocks of a given bipartition of the elements. The smallest number of new edges is given by a min-max formula that has six infinite families of exceptional cases. We discuss a problem on network flows whose solution has a similar formula with three infinite families of exceptional cases. We also discuss a problem on arborescences whose solution has five infinite families of exceptions. We give an algorithm that increases the edge-connectivity of a bipartite digraph in the same time as the best-known algorithm for the problem without the bipartite constraint: O(km log n) for unweighted digraphs and O(nm log (n ²/m)) for weighted digraphs, where n, m and k are the number of vertices and edges of the given graph and the target connectivity, respectively.     

反驳克里普克的模态论证

对克里普克的模态论证及其相关环节做了详尽的批判性考察,得出如下结论:(1)关于严格性的直观测试行不通,其中存在一个不合法的跳跃:从"一个对象必定自我同一"这个形而上学论断跳到一个语言哲学命题"一个名称是一个对象的严格指示词";(2)关于严格性的精确定义与引出严格指示词的语言直观相冲突;(3)反驳描述论的模态论证不成立:所谓的"严格指示词"可以归结为在模态语境中取宽辖域的非严格的名称;假设真有所谓的"严格指示词"的话,限定摹状词也可以被严格化,我们仍没有理由否认名称是相应摹状词的缩写。(4)克里普克对关于他的模态论证的宽辖域批评所做的回应也是失败的。所有这些结论都依赖于一个隐含前提:名称和摹状词在模态语境中可以取宽辖域或窄辖域,而此前提在本文中得到了论证。     

国际女性恐怖犯罪及其对新疆的警示

自进入21世纪以来,国际恐怖组织和宗教极端组织逐渐将伊斯兰世界的女性推到恐怖活动的第一线,女性参与自杀性恐怖袭击的人数呈持续攀升态势.因此,剖析世界伊斯兰女性恐怖犯罪的成因与特点,研究分析国际恐怖组织发展女性的趋势,可以警示我们采取有效措施防范更多新疆的信仰伊斯兰教的少数民族女性成为“三股势力”的“殉道者”.     

刑罚配置视域中刑阶动态衔接问题研析

刑阶衔接是实现罪刑均衡的前提要求。尽管从静态上观察我国刑罚基本上实现了刑阶的衔接。但引入动态观察的视角就会发现在实然衔接上我国刑阶尤其是生刑与死刑的刑阶存在很大的断裂。其根源在于本有的衔接性刑阶被虚置化,而刑罚执行制度对于其本有刚性的破坏更是恶化了这一断裂的现象,因而有必要在立法上强化生刑的严厉性,这种强化并非对刑罚轻缓化的违背,而是实现的真正保障。至于维持生刑刚性所带来的潜在危险完全可以通过宽严相济的刑事政策得以弥补。     

单一化的主流意识、教化机制与“越轨亚文化群体”的“集体抵抗”

近几年来,未成年人犯罪问题随着社会的发展愈加恶化,并成为广受关注的问题;在对湖北省未成年犯管教所未成年犯深入访谈的基础上,文章分析了犯罪未成年人犯罪亚文化的形成过程、原因与特点,提出了当前单一化的主流意识与教化机制致使在未成年人群体中过早形成了狭窄的社会分层机制的观点,并重新审视当下主流社会的价值观及其单一的教化机制,以《国家中长期教育改革和发展规划纲要（2010—2020年）》为指导,倡导与推行素质教育,为未成年人提供广阔施展才能的话语空间。     

日本军事力量发展的特点与动向分析 ——2020年版《防卫白皮书》解读

2020年版《防卫白皮书》总结了过去一年来日本的安全环境、防卫政策、军力建设与防务合作交流等问题。新版白皮书虽然在外表上刻意用粉色为底、附以梅花和富士山图案的封面营造出柔和印象,但在内容中一面渲染周边安全环境恶化,继续炒作“中国威胁论”,在对华认识上充斥着偏见与敌视,罔顾事实、故意给中日关系的正常发展制造矛盾,另一面突出“跨领域作战能力”的建设重点,大幅增加太空、网络、电磁波这些新领域中军事力量建设的“紧迫性”与进展情况的相关内容。从2020年版《防卫白皮书》所展现的内容来看,日本的军事力量发展早已突破了“专守防卫”限制,明显体现出进攻性特点,必将给东北亚地区的和平与稳定产生重大影响。     

The threat of monument designation as a technique for successful wilderness legislation: Using the Antiquities Act as a carrot or a stick

Congress provides the highest level of federal lands protection when it creates wilderness using the Wilderness Act. There are times, however, when Congress refuses or seems unwilling or unable to take such environmental policy action. In a handful of instances, presidents have strategically used the threat of or actual unilateral monument designation under the Antiquities Act to get Congress to create new wilderness under the Wilderness Act. Under the Antiquities Act presidents may, without stakeholder or congressional input or approval, unilaterally create national monuments covering public lands that fall within the parameters of its provisions, including lands that would be considered wilderness. This strategy may be used by future presidents that wish to encourage Congress to enact environmental policy protecting remaining pristine federal lands with a wilderness designation. This article analyzes three instances where this strategy was successfully used and identifies specific steps taken in each situation that ultimately led to congressional action creating new wilderness.     

The pressure cooker: When crisis stimulates explorative business model change intentions

How do firms respond to critical threats, such as regulatory turmoils or disruptive innovations? After more than three decades of contradicting theoretical arguments and inconsistent empirical results, this question remains unresolved. One view argues for and finds evidence for amplified propensity to engage in change when organization members perceive critical threat. The other view supports the threat-rigidity phenomenon, reinforcing resistance to change through a focus on habitual practices and routines. To resolve this puzzle, we draw on the multi-dimensional framework of ‘crisis’ strategic issues processing, supplemented with the behavioral decision making perspective. In particular, we investigate the conditions of emergence of radical (explorative) business model change intentions within organizations in response to major threats. The resulting model suggests that cognitive moderators – perceived predictability and time pressure – lead to highly divergent results of critical threat perception, such that low predictability and high time pressure attenuate the threat-induced explorative business model change intentions. The model is tested in two empirical contexts, real estate brokerage and higher education, finding strong empirical support.