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William Henry Harrison studied medicine in Richmond and Philadelphia before dropping it in favor of a military career.(He is the only president who studied to become a doctor.) In 1791 he joined the Army, and through family connections obtained an officer's commission as ensign in the First Infantry. He was then 18 and in charge of about 80 men whom he had recruited to fight Indians on the Western frontier.
威廉亨利哈里森在投入军旅之前、於里其蒙与费城就读医学(他是美国唯一一位就读医学科系的总统),在1791年他加入军旅,透过家族关系获得第一步兵团中的海军少尉职务,当时他十八岁、带领大约八十名他自行招募来的军人、对抗西方边境的印地安人。
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The maxillofacial and brain injuries were examined. Craniptomy was done to animals of impact injury 6 hours after damage, however it was done to animals of explosive injury in different time point (1 hour, 24 hours, 72 hours, 7 days, 14 days after damage). The pathological characteristics of corelative tissues were examined in detail under light and electron microscopes. The content of LPO, SOD, NO in soft tissue, brain, blood, and cerebral water content were measured, compared with control. The distribution and tissue location of NOS were studied by histochemistical and immunohistochemistic methods. Their relationship was studied to assess the pathological and physiological characteristics of maxillofacial injuries and brain damage associated.
撞击伤各组动物于伤后6h、爆炸伤各组动物于伤后不同时期(1h、24h、72h、7d、14d)开颅检查颅脑损伤情况,切取伤区肌组织、左侧脑组织、脑干标本行光镜、电镜观察;测定伤后肌组织、脑组织与血中LPO、SOD、NO含量及脑水含量变化;并使用组织化学和免疫组织化学的方法,观察伤后脑组织中NOS的分布和组织定位,研究伤后机体的病理及病理生理学改变特点,以及颅脑损伤与机体自由基反应、NO含量改变之间的关系,证实其病理作用。
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Multicarrier and multicarrier CDMA systems are the candidates with a greatapplied foreground for future mobile communications system.Some keytechniques in the two kinds of systems,including the reduction of peak-averagepower ratio and so on,are studied in this dissertation.The main contents ofthe dissertation are as following:(1) The way to constitute a multicarrier signal by using any onecomplementary code from multiphase complementary code pair is proposed,andthe upper bound on crest factor for a multicarrier signal is studied.
多载波及其多载波CDMA系统是未来移动通信系统一种很有应用前景的侯选方案,本文针对这两种系统中的峰平功率比减小等关键技术进行了研究,主要内容包括:(1)提出了利用多相互补码对中任一互补码构成多载波信号的方法,研究了多载波信号峰值因子的上边界。
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Concentrated on the questions of high external water pressure and flow of the deep-lying tunnel, the basic theory and method calculating external water pressure are systematically studied, the high external water pressure of Jinping cascade 2 hydropower station is analyzed and studied in detail.
本文在总结前人研究成果的基础上,围绕深埋隧洞的突涌水和高外水压力问题,系统地研究了深埋隧洞衬砌水荷载和外水压力的作用机理及计算方法等理论,并对锦屏二级水电站深埋引水隧洞的外水压力问题进行了详细的分析和研究。
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The dynamics model of missile sealifts system for navy ships connected parallely is established. The dynamics simulation analysis of system is studied. The dynamics characteristic of missile box on the condition of different sea states and place parameters of crane are analyzed. The theory and technology bases for the design of system of missile sealifts or navy ships connected parallely are presented. The controlled multibody system dynamics of the system of missile sealifts with wave compensation for navy ships connected parallely is presented. On the condition of stochastic momevement of depot ship and incept ship and under the action of sealifts and wave compensation, the dynamics of sealifts system is studied by using discrete time transfer matrix method of multibody system. The calculate method of electric machine impule is developed in the process of supplying missile and action of wave compensate. Based on the PLC control system, the control method, which control supply process by testing torque of guide strings is presented.
本文建立了舰艇并靠导弹补给动力学模,进行了舰艇并靠导弹补给及波浪补偿系统动力学仿真分析,获得了导弹箱在不同海况下和舰用起重机不同位置参数的运动规律,为舰艇并靠导弹补给系统设计提供了理论依据和技术基础;建立了舰艇并靠导弹补给及波浪补偿受控系统多体动力学,在补给舰和被补给舰随机运动下,在补给和波浪补偿系统作用下,应用多体系统离散时间传递矩阵法进行了补给系统动力学分析,得到了导弹补给过程中,波浪补偿时,导引电机和卷扬电机输入电机脉冲计算方法;建立了以PLC 控制系统为核心,用扭矩传感器测量导引带产生的扭矩来控制补给过程的控制方法;对系统振动问题进行了研究,提出了通过调整伺服电机参数减少系统振动的方法。
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The main research results achieved in this paper can be summarized as follows:(1) Pixel energy is first defined by square of pixel grey value. Region energy distribution at both sides in different edge is studied. On the other hand, the ratio of the region energy threshold difference and the region area is studied, too.
主要研究成果包括:(1)本文定义了像素灰度平方为像素能量,研究了局部区域内不同边缘两侧能量的分布和区域能量阈值差与区域面积比值。
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In this paper, serum thyroid hormones level of the adult rats exposed to decabrominated diphenyl ether(BDE-209) at different doses was determined and the influence of BDE-209 to thyroid hormones was studied preliminarily. The dose dependent relationships between THs and BDE-209 concentrations were studied.
论文建立了十溴联苯醚(BDE-209)暴露剂量的成年大鼠模型,测定了不同暴露剂量的实验动物血清甲状腺激素(Thyroid hormones,THs)水平,初步研究了PBDEs污染物对生物体甲状腺激素的影响。
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The study of impact of dirt band on top coal drawing mining;2. The paper has studied the caving characteristics and technology on the fully-mechanized caving mining working face in structural complex thick seam containing dirt band are studied.
通过对综放工作面含夹矸结构复杂段顶煤放出特征和放煤工艺的研究,提出选择两刀一放单轮间隔放煤方式,有利于提高煤炭回收率,降低原煤含矸率。
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This paper studied relative characters and correlation of three ear leaf for 15 high combining inbred lines for select better inbred lines.studied that parents selected and mated,predicted heterosis.
通过对15个高配合力亲本自交系及其组配的8个杂交种棒三叶有关性状及相关性的研究,揭示优良自交系的特征,探索亲本的搭配,予测杂种优势的大小。
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Two new methods about preparation of nano-inorganic coated polymer microsphere have been found. The research mainly focused on controlled precipitation of inorganic precurdors onto the polymer microspheres, technique of preparation and size distribution of transition metal oxides and sulfides emulsion particles, nano-paticles''surface modification and the HLB values adjustment, emulsification of oil-soluble monomer in inorganic colloid and emulsion stability, emulsion polymerization that inorganic particles act as medi-phase, the preparation of inorganic nano-particle/polymer hybrid microspheres, preparation of hybrid materials in inverse emulsion, inverse emulsion polymerization of acrylamide and its phase behavior. Inorganic nano-particles we studied concerning TiO2、SiO2、Fe3O4、ZnO、ZnS、Ag and black carbon. Also we studied the morphology and capability of the hybrid materials.
主要内容有:无机物在高分子乳胶模板体系的界面定位沉积研究;过渡金属氧化物、硫化物纳米胶体粒子的制备工艺与胶粒尺寸分布研究;纳米粒子的表面修饰及其亲水亲油平衡值的调制;油溶性单体在无机胶体中的乳化行为与乳液稳定性研究;以无机纳米粒子做中介相的乳液聚合与无机纳米粒子/高分子复合微球制备研究;反相体系中杂化材料的制备;丙烯酰胺水溶液反相乳液聚合、相行为与稳定性;丙烯酰胺反相体系中无机粒子的制备研究;涉及到TiO2、SiO2、Fe3O4、ZnO、ZnS、Ag、碳黑等纳米无机物,系统考察了相关材料的形态与性能,为其应用开发奠定了基础。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力