149 research outputs found

    Shape Optimization for Hypersonic Arc-Wing Missiles

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    社区矫正制度实施问题分析及对策研究——以湖北省为例

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    社区矫正是指通过适用各种非监禁性刑罚或刑罚替代措施,使罪犯得以留在社区中接受教育改造,以避免监禁刑可能带来的副作用,并充分利用社区资源参与犯罪矫正事业的一种罪犯处遇制度。我国社区矫正工作的开展已经取得了一定成绩,但是在制度认识深度、工作力度和人员配置等多方面还存在着较明显差距。各地应当根据省情特点,在部门关系协调等方面加大工作力度,将社区矫正工作全面推进到新的层面。湖北省法学会项目“湖北省社会化矫治与帮教管理制度研究”(项目编号:SFXH205);湖北经济学院青年基金项目“刑事案件分案并案审理研究”(项目编号:XJ201105

    Conceptual studies of the high pressure zone capture wing configuration for high speed air vehicles

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    针对高速飞行器大容积、高升力、低阻力和高升阻比设计需求,本文首次提出一种带有高压捕获翼的新型气动布局概念.与传统升力体或乘波布局比较,该布局的主要特点为在飞行器机体背风面增加了与来流方向平行的曲面翼,称之为高压捕获翼.在高速巡航飞行条件下,通过合理的配置,高压捕获翼可以捕获来流经机体上壁面压缩后形成的高压区,利用捕获翼上下表面形成的大压力差使飞行器的升力获得大幅补偿.同时飞行器的升阻比可获得大幅提升.此外,当飞行器容积及重量增加时,其上壁面压缩增强,可使捕获翼的升力进一步增大,从而实现升力与重力的自补偿效果.几个概念实例计算结果均表明,增加高压捕获翼后飞行器的升力可大幅提升达30%以上,升阻比提升一般可达20%以上

    翼反角对高压捕获翼构型高超气动特性的影响

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    为研究翼反角变化对高压捕获翼构型高超声速气动特性的影响,基于一种双翼面、单支撑、翼身组合布局的高压捕获翼概念构型,以飞行马赫数6,飞行高度30km为计算状态,捕获翼和机体三角翼上/下反角为设计变量,结合均匀试验设计方法、数值模拟方法和Kriging建模方法,探寻了升阻特性、纵向和横航向稳定性随翼反角的变化规律。结果表明,升力、阻力及升阻比随翼反角的变化规律基本一致,且对上反角变化更加敏感;小攻角时,翼面上反会明显降低升阻比,而下反会使升阻比先略微增大后缓慢减小;大攻角时,翼反角对升阻比的影响较小;纵向稳定性主要受三角翼反角的影响,三角翼上反时,纵向稳定性降低,下反时,纵向稳定性基本不变;翼面上/下反都会提高航向稳定性,但下反的效果更明显;翼面上反会提高横向稳定性,下反则降低,但大攻角飞行时,三角翼上反角过大可能会导致横向稳定性降低

    Hypersonic I-shaped aerodynamic configurations

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    Response Surface Technique for Static Aeroelastic Optimization on a High-Aspect-Ratio Wing

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    Optimization of the upper surface of hypersonic vehicle based on CFD analysis

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    For the hypersonic vehicle, the aerodynamic performance becomes more intensive. Therefore, it is a significant event to optimize the shape of the hypersonic vehicle to achieve the project demands. It is a key technology to promote the performance of the hypersonic vehicle with the method of shape optimization. Based on the existing vehicle, the optimization to the upper surface of the Simplified hypersonic vehicle was done to obtain a shape which suits the project demand. At the cruising condition, the upper surface was parameterized with the B-Spline curve method. The incremental parametric method and the reconstruction technology of the local mesh were applied here. The whole flow field was been calculated and the aerodynamic performance of the craft were obtained by the computational fluid dynamic (CFD) technology. Then the vehicle shape was optimized to achieve the maximum lift-drag ratio at attack angle 3 degrees, 4 degrees and 5 degrees. The results will provide the reference for the practical design

    自适应主动热防护装置及飞行器

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    本发明提供一种自适应主动热防护装置及飞行器,该热防护装置包括:至少一条设置在机体前缘内部的排气通道和一用于储存冷却工质的贮藏箱;所述排气通道的进气孔设置在机体尖化前缘的迎流面,所述排气通道的出气孔设置在机体尖化前缘的背流面;所述贮藏箱靠近进气孔的一侧设置有能随所述进气孔压力增加而产生变形并挤压贮藏箱内部冷却工质的柔性隔膜,所述贮藏箱通过排液口与所述出气孔连通。飞行器在飞行过程中,利用进气孔与出气孔之间的气流压差,将贮藏箱内的冷却工质主动喷洒在前缘尖端,进而降低尖端温度,尖化前缘附近的气流场不受干扰,且不会增加前缘的阻力

    The Analysis on the Joint and Separated Trials in Criminal Cases

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    刑事案件合并与分离审理是司法实践中的常见现象。合并审理的目的主要是提高诉讼效率,而基于其他诉讼利益的考量,又经常需要对一些符合合并条件的案件进行分离审理。大多数法治发达国家和地区对这一问题都进行了全面且细致的立法。但在我国,这种合并与分离审理行为尚未引起充分重视,刑事诉讼法典中对此基本上没有规定。虽然司法机关颁布了不少相关的司法解释,不过法律规范缺乏权威性、系统性和科学性,在客观上造成了大量的“不当合并审理”与“不当分离审理”现象。刑事案件合并与分离审理立法上的不规范不仅容易侵害当事人的诉讼权利,也不利于发现案件真相。在处理人数众多,罪行复杂的涉黑案件等重大案件时,这种程序上的缺陷表现得愈发明...It is a common phenomenon in the judicial practice that the joinder and separated trial in criminal trials. The main purpose of the joinder is to efficiency of the proceeding in most time. We have to separate the trial in order to get the other litigation interests sometimes. The joinder and separated trial is a common system in the criminal procedure. Most countries and regions spell out the join...学位:法学博士院系专业:法学院法律系_诉讼法学学号:1362009015316
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