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Methods:One hundred and six disarticulated human verebrae(C3~C7)were evaluated with computed tomography to determine vertebral bone mineral density.Pedicle screws and lateral mass screws were inserted to the left and right at random.Screws were loaded either axially strictly longitudinal to failure or in a coronal plane strictly perpendicular to the logitudinal axis,the strengths and displacements were recorded.
方法解离C3~C7骨块120个随机分为两组,测量每个椎体骨的松质骨密度,同一节段椎体随机配对置入椎弓根和侧块螺钉,在位移控制下分别测量位移控制下的平均最大拔出阻力和压力控制下的切向弹性与永久位移。
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Under catalysis of AlCl3, trans-1-chloro-3-phenyl-1-propen-3-one was first prepared using benzoyl chloride and acetylene in CH2Cl2 at 20~25℃, which the yield is 7% higher than that in CCl4 at 40~45℃.
通过对其反应条件的研究,首次用苯甲酰氯和乙炔在三氯化铝作用下合成出反-3-苯基-1-氯-1-丙烯-3-酮;并发现用二氯甲烷作介质在20~25℃下的反应产率,比用四氯化碳作介质在40~45℃下的反应产率约高7%。
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The process for dyeing superfine polyester fabric with disperse dye in alkaline bath was studied.
用分散染料在碱性浴条件下对超细涤纶织物的染色进行了研究,分别对酸、碱性染浴条件下的上染百分率、染色牢度进行了测试,结果表明:超细涤纶在碱性条件下进行染色是可行的。
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The dose enhancement effects and decreasing effects caused by material inhomogeneity were studied quantitatively with a parameter named Dose Perturbation Factor, which was the ratio of the dose at a point in the heterogeneous phantom to the dose of the same spatial location point in the homogeneous phantom. It was showed that the degrees of the dose enhancement or decreasing depended on the energy of radiation, field sizes of the beamlets and compositions of the media. The dose perturbation for high energy X rays is greater than that for low energy X rays. At the same energy condition, the dose perturbation decreased when the field size increased. And the relationship between them was not linear.
模拟结果表明:在小射野情况下,异质组织界面处出现了较大的剂量跃变,剂量扰动效应的强弱程度取决于射线的能量、射野的大小和模体介质的不同等多种因素,高能X射线条件下的剂量扰动效应大于低能X射线条件下的剂量扰动;在入射X射线能量相同的条件下,剂量扰动效应随射野尺寸的减小而增强,并呈现一种非线性关系。
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The results show that eutectic Al9FeNi phase can be fractured under different deforming conditions, but the primary Al9 FeNi phase is only partly deformed greatly.
结果表明,在不同条件下的高温变形均可使针状共晶l9FeNi相碎化,而对初晶l9FeNi相,只有在较大变形量下才能碎化;在热变形温度为400℃,应变速率为1 s-1,变形量为60%的热模拟实验条件下,不仅共晶l9FeNi相得到明显破碎,而且初晶l9FeNi相也得到一定程度的破碎。
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The paper presents the principle of dividing fire protection sections in fortes road tunnels, the principle of fire ventilation design of fortes road tunnels in segment longitudinal ventilation mode, the fire ventilation design method, the fire ventilation calculation criteria and jet fans' collocation principle of fortes road tunnels in segment longitudinal ventilation mode.
论文提出了特长公路隧道防火分区划分原则,特长公路隧道分段纵向通风模式下的火灾通风设计原则,特长公路隧道分段通风模式下的火灾通风设计方法,特长公路隧道分段通风模式下的火灾通风计算控制基准,特长公路隧道射流风机布置原则。
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The Sommerfeld effect, a quantum-mechanical process that makes particles more likely to interact with one another in some circumstances and less likely in others, is mostly ignored in particle physics because it applies only in a limited range of conditions.
这个效应是一个量子力学领域的过程:在该效应作用下的粒子在一些特定情况下更易于相互作用,在其他情况下则相反。这种效应在粒子物理学里总是被忽视是因为它可以应用的场景及其有限。
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From May 4th Movement of 1919 to the 1920s, sex love narrations in Chinese novels were rather an enlightenment and liberation in that particular era with four characteristics. Firstly, sexual desire was endowed with rationality with regard to liberation of human nature and mutual love. Secondly, with an epochal concern for a stronger and superior race, greater attention was paid to sexual parties concerned, mainly physically. Thirdly, new ethics on sex were promoted in that personal freedom on sex love was emphasized and sex love became an important way of self-fulfillment. Therefore, independence of sex love was advocated and the scope of sex love was also widened. Fourthly, the sex consciousness of this period had the mixed features of the past and the contemporary. Sex love narrations in the 1930s and 1940s showed a further exploration on the theme of human nature. First of all, sex was restored to a kind of desire. ShenCongwen probed the importance of harmonious sex love to a sound personality and Shi Zhecunrevealed that sexual inhibition could lead to the distortion, even frenzy of human nature. Bothexplored the influence and functions of sexual desire as human nature upon human personality,giving prominence to the irresistibleness of sexual desire and the significance of sexual desire asa motive. Then, human bodies driven by sexual desire were described and given greater attentionto. Next, ethics on sex were deconstructed either by Shen Congwen who opposed man-madeethics with law of nature and the School of New Sensation who replaced traditional ethics on sexwith exchange rules in consumption, or by Shi Zhecun who spared no efforts in representing thecomplete failure of social rules, including ethics on sex, due to the impact from sexual desire.The direct effect was a paleness of the ethical binding force on sex. Last, sex consciousness inthe works of female writers emerged. In the early works of Ding Ling, the sexual desire of thefemale is no longer a ramification of emotion but an independent one. In addition, in the sex lovenarrations of other female writers, such as Mei Niang, strong self-consciousness on the socialstatus of the female is also reflected. Sex love narrations in the late 1970s and early 1980s wereactually a re-enlightenment in the spirit of humanism, whose major features include humanisticlegitimation of sex love within the boundary of ethics, a blend of sex love narrations withnational concepts and national myths as well as the aesthetic, poetic descriptions of humanbodies etc. In the middle and late 1980s, sex love narrations entered a stage of exploration forpluralism. First, by restoration of sexual desire, writers of this era restored human nature, thevery original state of human being. Different emphasis and tendencies could be seen in differentwriters: looking at sex love dialectically and trying to describe its creative as well as destructivecharacteristics; connecting sex love with violence and trying to reveal the evil side of humannature through it; emphasizing the creativeness of sex love especially in the heritage of"wildness".
从&五四&到20世纪20年代,中国小说的性爱叙事是一种处在时代夹缝中的启蒙和解放,其所表现出来的特点,一是正面赋予性欲望以合理性,这种合理性是在人性解放和爱情前提下获得的;二是在强种育种的时代焦虑影响下小说性爱叙事表现出对物质身体的关注,其焦点主要在体格方面;三是树立起新的性伦理道德观念,表现为强调在性爱问题上的个人选择自由,性爱成为个人自我实现的重要方式,从而赋予人在性爱问题上的独立性,同时还扩大了性爱表现的领域;四,这个时期小说性爱叙事中所表现出的性意识还具有新旧杂糅的特点。30、40年代小说性爱叙事表现出对人性主题的深化与丌拓,首先是把性还原为欲望本身来探索,沈从文从和谐性爱对健全人性的决定作用、施蛰存从性压抑会导致人性扭曲甚至疯狂的角度探讨作为人类本质性欲望的性对人性产生的影响和作用,突出了性欲力量的不可抗拒和作为人类行为的重要动力等方面的内容;其次在叙事中表现出对欲望化了的身体的描绘与关注;第三是解构了性的伦理道德,无论是沈从文以自然法则来反对人为的道德设置还是新感觉派用消费交换原则替代传统性伦理道德,或是施蛰存极力表现包括性伦理规范在内的社会法则在性欲力量冲击下溃不成军,其直接的效果都是使性伦理道德对人的约束力量显得苍白虚弱;第四,出现了由女性作家表现的女性性意识,在丁玲的早期作品中女性的性欲望不再是作为感情的衍生物而是独立的欲望存在,而在梅娘等其他女作家的小说性爱叙事中则表现出对女性社会地位的强烈自觉意识。70年代末80年代初期小说的性爱叙事实际上是在人道主义语境下的再次启蒙,其主要特征一是性爱在人道主义前提下获得合法性,但要求性爱不超出伦理规定的范围;再就是将性爱叙事同国家观念和民族神话相融合;此外还有对身体的描写审美化诗意化等。80年代中后期,小说性爱叙事进入了多元化探索的阶段,作家通过还原性欲望来还原人性、还原人类的本真状态,不同作家笔下表现为不同的侧重和倾向——以辨证的方式看待性爱,写出其具有的创造性力量和毁灭性特征;将性爱与暴力相联系并通过其来表现人性的黑暗;强调性爱的创造性作用,尤其在民族&血性&的传承方面。
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Chirp scaling algorithm is considered more efficient and widely applicable when the bistatic SAR system is in side-look or small squint angle mode,but in large squint angle case,the errors caused by Taylor expansion are so large that the algorithm could lose its precision.In such a case,an equivalent mono-static SAR range mode which has fewer errors than Taylor expansion with large squint angle is proposed to substitute the range history of bistatic SAR.Then bistatic SAR images with large squint angles are gotten by common Nonlinear CS algorithm.The effectivity of the method is verified by Matlab simulation.
在正侧视或小斜视情况下,CS算法具有较好的聚焦性能和广泛的适用性,但在斜视角较大的情况下,该算法将散焦而不能成像,因而提出了用等效的单基地距离模型来代替双基地距离历史的方法,解决了大斜视角情况下距离模型二阶近似误差较大的问题,并结合单基地非线性CS算法,实现了在大斜视角情况下的基于GPS反射信号的双基地SAR高精度成像,最后通过Matlab仿真进行了验证。
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Finally, the paper provides the checking computations of themost dangerous cases of the cast ball-and-socket support node planned to be use in thedouble-layer reticulated dome roof of Laoshan Cycling Gymnasium for BeijingOlympic Games. The node under most dangerous cases is analyzed by ANSYS7.0 toget the distribution of stress and assurance coefficient. All these results can be thetheoretical warranty for the use of project of Beijing Olympic Games
最后,对北京奥运会老山自行车馆双层球面网壳柱脚拟采用的铸钢球铰支座节点在最不利工况下节点承载力进行了验算,并通过ANSYS7.0对节点在最不利工况下的应力分布进行分析得出了节点在这些工况下的安全系数从而为在北京奥运会老山自行车馆工程中使用这些节点提供了理论依据。
- 推荐网络例句
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I will endeavour to find you some assistance.
我尽力帮你找人帮忙。
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At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.
起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。
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Ah may dee:You are chinese living in a democratic country.
你是居住在民主国家的中国人吧。