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The finite element model included two types of main element: beam element for concrete and truss element for internal unbonded or external tendon. The end nodes of main elements were connected with internal constraints named MPC in ABAQUS. Spring elements with very large stiffness were set up at the place of the deviators of externally prestressed beams, or along the span with relatively little space of unbonded internally prestressed beams. The modified Riks method is utilized to trace the entire structural response of beams prestressed with unbonded tendon from zero to ultimate loads. The reliability of the analysis model is verified by analytical results of typical test beams in comparison with experimental ones.
该有限元模型由两类主单元组成,即混凝土梁单元和体内无粘结或体外预应力筋桁架单元;主单元的端部节点用ABAQUS的内在约束MPC连接;在体外预应力梁的转向块处,或沿体内无粘结预应力梁全跨并以比较小的间隔设置刚度足够大的弹簧单元。
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RESULTS The results indicated that PCF could significantly increase the viability of thymocytes and enhance the activities of SOD, GSH-Px, CAT in cells. PCF decreased the amounts of ROS and the rate of apoptosis in cells. PCF inhibited the morpholog alteration of the thymocytes irradiated by UVB and maintained the ultrastructure of cells in normal. PCF attenuated UVB caused DNA fragmentation in thymocytes. While combined ERKs inhibitor yielded typical DNA fragmentation, co-treatment of thymocytes with PCF and JNKs and p38 kinase inhibitors completely blocked UVB-induced DNA fragmentation.
结果 PCF能显著提高UVB辐射后小鼠胸腺淋巴细胞的活性;提高胞浆中SOD、GSH-px、CAT的活性,降低ROS含量及细胞凋亡率;抑制UVB辐射所致的胸腺淋巴细胞凋亡的形态学改变,维持细胞的正常超微结构;抑制UVB所致的胸腺淋巴细胞DNA片段的出现;预先应用ERK抑制剂使DNA片段增加,给予JNK和P38抑制剂后协同PCF使DNA片段带减少。
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To solve the problems of right remedies and safeguarding the procedural rights in civil proceedings in the event of the absence of one party, western countries has developed the mode of system of trial by default represented through two typical modes of doctrine of trial by default and doctrine of ex parte debate.
为解决民事诉讼中一方当事人缺席时的权利救济和程序权利保障问题,西方国家形成了缺席判决主义与一方辩论主义两种代表性的缺席审判制度模式。
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At the base of a large mount of reference books, the a number of detailed fieldworks,the analysis of three typical examples and the scientific inductive research methods, it is a new attempt to discuss the decoration art of the traditional dwelling of Qing Dynasty in Jiujiang districts of Jiangxi Province.
本论文通过文献阅读、实地调查、案例分析和归纳总结的方法,针对江西九江地区独特的清代民居建筑装饰艺术进行研究分析,是一种新的尝试。
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The basic relationship between the the first half-wave peak value of transient current and the initial firing angles is found by means of analytical method.The practical method is put forward to determine the initial two-phase and the third phase firing angles with the limiting value and the space vector varying track of transient current.And then the subsequent series of firing angles with the even step are calculated by using the speed at the time of re-switching.The suppressive effect to the inrush current is verified with simulation and experiment of rapid soft re-switching control,by which the influence of different speed to rapid soft re-switching course is analyzed besides.3 To analyze the power loss for typical periodically variable running load and deeply study the energy-saving principle and control mode of the intermittent power supply approach. Futhermore,the novel integrated energy-saving control technique is developed on base of the intermittent power supply approach.
通过解析方法找到快速软投入初始触发角与瞬态电流首半波峰值加热板之间的基本关系,进而提出了由限流值和空间向量轨迹确定初始两相和第三相触发角的方法,并以固定步长均匀递减的方式由投入时转速计算出其它后续触发角;结合仿真和实验验证了快速软投入对冲击电流的抑制作用,并分析了不同转速下投入时对电源快速软投入过程的影响。3对典型周期性变工况负载特性进行能耗分析,深入研究断续供电节能机理和控制模式,并进一步发展了以断续供电为主的综合节能控制新技术。
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The basic relationship between the the first half-wave peak value of transient current and the initial firing angles is found by means of analytical method.The practical method is put forward to determine the initial two-phase and the third phase firing angles with the limiting value and the space vector varying track of transient current.And then the subsequent series of firing angles with the even step are calculated by using the speed at the time of re-switching.The suppressive effect to the inrush current is verified with simulation and experiment of rapid soft re-switching control,by which the influence of different speed to rapid soft re-switching course is analyzed besides.3 To analyze the power loss for typical periodically variable running load and deeply study the energy-saving principle and control mode of the intermittent power supply approach. Futhermore,the novel integrated energy-saving control technique is developed on base of the intermittent power supply approach.
通过解析方法找到快速软投入初始触发角与瞬态电流首半波峰值之间的基本关系,进而提出了由限流值和空间向量轨迹确定初始两相和第三相触发角的方法,并以固定步长均匀递减的方式由投入时转速计算出其它后续触发角;结合仿真和实验验证了快速软投入对冲击电流的抑制作用,并分析了不同转速下投入时对电源快速软投入过程的影响。3对典型周期性变工况负载特性进行能耗分析,深入研究断续供电节能机理和控制模式,并进一步发展了以断续供电为主的综合节能控制新技术。
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A new method was developed for design of the composite material flywheel with high speed. In this paper ,the method of optimization of shape design for the composite material flywheel with high speed was put forward on the base of the analytical method and research optimization of shape design, and established the models of density optimization of energy and light mass.These models were used to design two typical composite flywheels with high speed in hybrid electrical vehicle flywheel battery and the stress level and convergence on the flywheel were got .Then a new way was developed for optimization of shape design of the composite material flywheel with high speed.
在此基础上对高速复合材料飞轮进行了形状优化设计,将复合材料有限元分析方法和优化设计技术相结合,提出了复合材料的形状优化的方法,分别建立了以高速复合材料飞轮的以储能密度最大为目标函数的形状优化模型和以质量最轻为设计目标的形状优化模型,并以混合动力客车飞轮电池中高速复合材料飞轮作为具体应用,使其在满足强度条件和几何约束条件下,分别寻求其最大储能密度和最轻质量,从而为高速复合材料飞轮的形状优化设计提供参考依据。
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When the lock ring simultaneously with the question cone gear engagement ring gear, cone after contact friction moment in the role of the rapid speed of gear to reduce to synchronize with the speed equivalent to lock ring, the two synchronous rotation, relative to gear Central lock synchronization speed is zero, thus inertia torque also disappeared, then in force under the impetus of engagement sets unhindered and synchronization lock Gear engagement ring, and further engagement with the question of gear engagement ring gear and completed Shift process The topics mainly through the Pro / E synchronization software for the car to three-dimensional modeling structural design, and through the parameters of the design process to achieve its structure, and on this basis, the use of ANSYS FEM software structure of the typical synchronization And a finite element analysis, through structural analysis of its structural design is reasonable to assess and make recommendations to improve the design
当同步锁环内锥面与待接合齿轮齿圈外锥面接触后,在摩擦力矩的作用下齿轮转速迅速降低到与同步锁环转速相等,两者同步旋转,齿轮相对于同步锁环的转速为零,因而惯性力矩也同时消失,这时在作用力的推动下,接合套不受阻碍地与同步锁环齿圈接合,并进一步与待接合齿轮的齿圈接合而完成换档过程本课题主要是通过Pro/E软件对汽车同步器进行三维造型结构设计,并通过参数化实现其结构设计程序化,在此基础上,利用ANSYS有限元软件对典型同步器结构进行有限元计算与分析,通过结构分析对其结构设计的合理性作出评价并提出改进设计建议
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This paper firstly reviews the evolution of American going-concern auditing opinion, so we can know the essence of this kind of auditing opinion. Secondly, on the base of analysing the conditions of going-concern of Chinese enterprises and a typical case, we draw our conclusion that chinses capital market urgently demands going-concern auditing opinion.Finally, this paper focuses on financial characteristic of company and the characteristic of going-concern auditing opinion, the market response to going-concern auditing opinion, the value relevance as well as the determinants of auditor reporting going-concern auditing opinion.
本文首先以美国为例,回顾了持续经营不确定性审计意见(going-concern opinion,以下简称为GCO)的发展沿革,籍此认识持续经营不确定性审计意见的本质内涵;其次,在对我国企业尤其是上市公司的持续经营问题进行分析的基础上,通过典型案例的剖析得出我国资本市场对持续经营不确定性审计意见存在较强烈需求的结论;最后,针对我国证券市场持续经营不确定性审计意见的市场反应、价值关联性及被出具持续经营不确定性审计意见公司的财务特征、审计师出具持续经营不确定性审计意见的影响因素进行了实证分析。
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Each are big on introductory world the company recombines a circumstance in the production of domain of car of orbit of low floor city, analyse each big company holds share in place of this one market, compare the characteristic of the low floor car of height of different floor board, give out the piece price of typical car and technical parameter.
介绍世界上各大公司在低地板城市轨道车辆领域的生产重组情况,分析各大公司在这一市场所占份额,比较不同地板高度的低地板车辆的特点,给出典型车辆的单位价格及技术参数。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。