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An Algonquian people known as the Nacotchtank inhabited the area around the Anacostia River in present-day Washington when the first Europeans arrived in the 17th century; however, Native American people had largely relocated from the area by the early 18th century.

一个Algonquian人称为Nacotchtank居住的周围地区Anacostia河在当今美国的第一个欧洲人当抵达17世纪，然而，本土美国人基本上迁往该地区的18世纪初。

Maintain test and measurement area, including anechoic chamber, rooftop measurement area, and listening rooms.

维护测试和测量区域，包括消声室、楼顶测量区域和听音室

The static model of torsion joint is based on that of bending joint. The effects of structure parameters inside air pressure, initial angle, rube average radius, rube shell thickness on the turning angle are analyzed and the following conclusions are drawn: the relationship between the angle of torsion joint and the inside air pressure is basically linear, the angle of torsion joint increases with the initial angle and rube average radius, the angle of torsion joint decreases while the rube shell thickness increases. The kinetic equation is built for torsion joint. Simulating experiment implies that the time of inflating and deflating process is extremely shorter than that of kinetic process. So the pneumatic process can be ignored in actual system design and control. The factors that affect the dynamic features of torsion joint, such as shell thickness of rubber tube, average radius, initial angle, connector's outlet area, moment of inertia and viscous damping coefficient, are analyzed and the following conclusions are drawn: the change of rube shell thickness has no effects on the dynamic process of FPA inside air pressure while greatly affects the turning angle of torsion joint; when the rube shell thickness is small, the torsion joint has a bigger turning angle, no overshoot and long risetime, when the shell thickness is big, the turning angle of torsion joint is small, but has high response speed, overshoot and low shock; when the rube average radius increases, the turning angle of torsion joint increases and the overshoot increases too; when the initial angle of torsion joint is big, the turning joint is big, the overshoot is small and shock is low, but the risetime is big; the connector's outlet area affects the dynamic process of FPA inside air pressure greatly, but has no effects on the dynamic process of turning angle; moment of inertia and viscous damping coefficient have no effects on the dynamic process of FPA inside air pressure, but affect the dynamic process of turning angle greatly.

在弯曲关节模型推导的基础上，建立扭转关节的静态模型，并分析了扭转关节内腔压力，初始转角，橡胶管平均半径，橡胶管壁厚等参数对关节转角的影响，得出扭转关节的转动角度与充入FPA内腔的压缩气体压力之间基本呈线性关系，扭转关节的转角随初始角度和橡胶管平均半径的增大而增大，扭转关节的转角随橡胶管壁厚的增大而减小的结论；建立了扭转关节的动力学方程，仿真实验表明FPA的充放气过程与扭转关节的动力学过程相比时间极短，在实际系统设计和控制过程中可以忽略不计；分析讨论橡胶管壁厚，平均半径，初始角度，气体节流口面积，转动惯量，粘性阻尼系数等因素对扭转关节动态特性的影响，得出橡胶管初始壁厚的变化对扭转关节FPA内腔压力的动态响应几乎没有影响而对关节转角的响应曲线影响比较明显，壁厚较小时，关节可以得到较大的转角，并且转角的响应曲线没有超调，但上升时间长，壁厚较大时，关节转角变小，响应加快，但是有超调和轻微振荡现象，橡胶管平均半径越大，得到的关节转角越大，但是转角响应的超调量也随之增大，FPA的初始角度越大，关节的转角越大，并且超调量减小，振荡减弱，但是上升时间增大，管接头出口面积的大小对关节FPA内腔压力的建立过程影响较大，但对关节转角的动态响应几乎没有影响，转动惯量和粘性阻尼系数对FPA内腔压力的动态过程几乎没有影响而对扭转关节转角有较大影响等结论。

Changed is a big agricultural city with a cultivated area of 7.01million mu and annal planting area of 15 million mu . The main crops of Changde include: rice, cotton, rape, fruits, vegetables, corn, tobacco, tea, and etc.

项目描述：常德是一个农业大市，有耕地面积701万亩，常年农作物播种面积1500万亩，主要农作物有水稻、棉花、油菜、水果、蔬菜、玉米、烟草、茶叶等。

A data gathering scheme MADG(movement-assisted data gathering),which makes use of the mobile base station for data collection,is presented.In this scheme,the base station moves in a stationary annularity area exploited for data buffering.The gathered data.are firstly forwarded into the buffering area and then collected by the mobile base station.

提出了一个利用移动基站协助数据收集的模式(movement-assisted data gathering，简称MADG)，它将基站移动区域设置为缓冲区，首先将数据沿最短路径传输到缓冲区内，然后在基站移动的过程中进行数据收集。

The GongBuCi have to describe according to the poem of DuFu behind with the structure and form of Ming Dynasty" grass shed view area" of recovering the reconstruction, re-appearing the pastoral appearance that poet so reside, constructing the thick thick poetry atmosphere;Have to set up in 1999 in flower arrangement park of" DuFu poem calligraphy wood-carved", display more than 100 DuFu's poem calligraphy wood-carved work, choose from the building hides several thousand in the pasts a hand book poem genuine calligraphy, engrave with the wood but, have to appreciate the value rather, its verse, calligraphy, have with the material, craft" four unique" it call;" big the hall" inside that locate the important male in a the third in building in thou in peaceful temple in original treasure , display the up to the present the large colored enamel of the local and biggest area(64 square meter) insets to whet to paint the mural with 12 in the pasts anthologist the person carves, image a development for displaying Du Fu usually with Chinese classic verse history;Building inside of basic display the 《 poem saint a thousand years 》, have the honor of acquiring the fifth" whole country ten big display the exhibition exquisite article" the best creativity prize.

工部祠后有依据杜诗描写和明代格局恢复重建的"茅屋景区"，重现了诗人故居的田园风貌，营造出浓厚的诗意氛围；在盆景园内有1999年建成的"杜诗书法木刻廊"，陈列着百余件杜诗书法木刻作品，是从馆藏数千件历代名人手书杜诗真迹中挑选出，用楠木镌刻而成，颇具观赏价值，其诗歌、书法、用材、工艺有"四绝"之称；位于原梵安寺古建筑群第三重大雄宝殿的"大雅堂"内，陈列着迄今为止国内最大面积（64平方米）的大型彩釉镶嵌磨漆壁画和12尊历代著名诗人雕塑，形象地展示了杜甫生平和中国古典诗歌的发展史；馆内的基本陈列《诗圣著千秋》，荣获了第五届"全国十大陈列展览精品"最佳创意奖。

Besides, depositional condition controls original physical properties of sand, and fractures generated by late tectonization improves the physical properties, all of them control the enrichment of hydrocarbon in this area. These factors are oil storage mechanism of anticlinal reservior in Xinshanyao Formation of Shanle area.

此外，沉积条件决定了砂体原始物性的好坏，后期构造作用形成的裂缝又有效地改善了储层物性，三者共同控制了研究区油气的富集程度，是鄯勒地区西山窑组背斜型油藏的储油机理。

The lower-level (850 hPa) ISO pattern is char-acterized by an anticyclonic circulation over the area south of the Changjiang River, the South China Sea, and the Western Pacific, and a cyclonic circulation from the area north of the Changjiang River to Japan.

对逐年夏季的分析表明，无论当年东亚夏季风强与否，在所划分的几个东亚季风区所有涝的年份里，太平洋同一纬带上大气ISO向西传播都明显较强，而在这些区域绝大多数旱的年份里，相应的ISO向西传播明显较弱。

The biggest area was 18cm×13cm,and the smallest was 4.5cm×10cm.there were 6 cases osteomyelitis with bone exposure,4 cases muscle tendonexposure.donor-area direct suture or plant skin.resultsall flaps survived,several cases flap were fat and clumsy and need make them thin in second intention.conclusionthe clinical result of repairing soft tissue defects in lower part of shank, the foot, with antidromic island flap providing blood supply by suralis nerver is reliable.the operation is sinple, without sacrifice of major arteries, low infection to foot, convenient for application.

其中骨髓炎骨外露6例，肌腱外露4例。供区直接缝合或植中厚皮片。结果：术后皮瓣完全成活，个别病例术后较臃肿，待二期将皮瓣修薄。结论：应用腓肠神经营养血管逆行岛状皮瓣修复小腿中下段及足部创面的临床效果可靠，手术操作简便，不牺牲小腿主要血管神经，对足部影响较小，便于推广开展。

Apanage falls in the the Xizang Autonomous Region in, the 11.01 ％ that production value of agriculture of the area austral hill occupies complete municipality (1995), so we chose hill sand of knot of Na Naidong county is resided appoint can choose investigation ground to decide, join the case of the area austral hill at the same time, inspect degree of modernization of research Tibet rural economics and mode.

在西藏自治区下属地中，山南地区农业产值占全自治区的11.01％(1995年)，所以我们选择了山南乃东县结沙居委会为定点调查地，同时结合山南地区的情况，考察研究西藏农村经济现代化程度及模式。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐