封闭的

The cylindrical shell of open circumambience with both ends simply supported and the cylindrical shell with clamped ends are analyzed, then the cylindrical shell of close circumambience with simple support and the other end clamped along straight edges are analyzed.

分析了两端简支的封闭圆柱壳、两端固定的封闭圆柱壳和两端简支直边固定的开敞圆柱壳的振动特性，同时研究了环向半波数对圆柱壳固有频率的影响，并给出了不同边界条件的振型图。

More attention is being focused on the deepburial closedsystem dolomitization. Some dolomitization of practical significance to the oil/gas reservoir and to the stratabounded deposits mainly occurred in closed system, which is different from the open system in the contribution to the change of reservoir space and the corresponding geochemical index.

3深埋藏条件下封闭系统的白云化作用受到关注：一些对油气储集空间和层控矿床有较大意义的白云化作用主要是在相对封闭条件下发生的，在对岩石储集空间的变化的贡献上以及在相应的地球化学指标上不同于开放条件下的白云化作用。

By exploiting the Richardson extrapolation and integral representation techniques under Heston (1993) framework, this paper develops analytic solutions for pricing and hedging American options when the volatility of the price of the underlying assets is stochastic.

本文是建立在Heston (1993)的论文架构底下发展出的随机波动美式选择权之分析解，由於美式选择权目前并不存在封闭解的型式，利用分析解可以取代封闭解准确又有效率的定价与避险的工作。

The differential exhumation caused by the NNE-trending faults probably continued all the way from the 180℃isothermal surface, through 110℃isothermal surface to the 70℃isothermal surface. At 90Ma, Dabie orogen"s average height of topography, compared with the current sea level, reached 1.45 km (when geothermal gradient is chosen as 25℃/km) or 1.75 km (when geothermal gradient is chosen as 20℃/km), which is 4(when geothermal gradient is chosen as 25℃/km) or 5(when geothermal gradient is chosen as 20℃/km) times of the height of today"s surface topography in simulated region.

这种由于NNE向断裂系引发的差异推隆剥露，可能从等温面180℃锆石(U-Th／He的封闭温度、经过110℃(磷灰石裂变径迹的退火温度)一直延续到70℃等温面磷灰石(U-Th／He的封闭温度大别造山带90Ma时与现今海平面相比地形平均高度可达1.45km(地温梯度取25℃／km时)或1.75km(地温梯度取20℃／km时)，是现今模拟区域地形平均高度的4倍(地温梯度取25℃／km时)或5倍(地温梯度取20℃／km时)。

A main feature during planning and construction of the Norwegian subsea tunnels is sealing the potential inflowing water.

挪威海底隧道规划与施工中的一个主要特点是封闭可能的渗水，多年的实践发展出一套系统的探测和封闭渗水的方法，挪威所有的海底隧道都应用了这一方法。

In this paper some typical retention and drainage chemicals have been compared under the white-water closure , and then a best chemical can be selected from the performance of the retention and drainage effect.

比较了在不同的白水封闭程度下几种常用的助留助滤剂的使用效果，对高的白水封闭状况下的助留助滤体系进行了优化，并分析了其机

Six kinds method the main body of a book is changed right away: Avianize the condition closing a problem; Conceal the conclusion closing a problem; According to condition or relation already giving examination questions,discuss the various conclusion; Give out a conclusion , explore sufficient condition making a conclusion be founded; Some similarities and differences of marriage partner burn comparatively; Comment that in having explored the various method of solving and conclusion , having been in progress in actual scene.

本文就变化的六种方法：弱化封闭题的条件；隐去封闭题的结论；根据已给题目的条件或关系，探讨多种结论；给出结论，寻求使结论成立的充分条件；比较某些对象的异同点；在实际情景中，寻求多种解法与结论，进行了论述。

By modeling and machining four samples, the paper discusses the method of the planar and multidimensional surfaces engraving, and solves the problems that appear in the process of modeling. For example, the graphics that are not unclosed and intersectant usually result in the modeling failure. The approach of solving the problem is that break up the junctions and connect all the relevant lines to the unclosed graphics.

通过雕刻实例分析，讨论了家具图谱的建模要点，并详细论述了平面雕刻尤其是异型面雕刻的建模方法，并对建模中出现的问题提出相应的解决方法，例如通过封闭二维图形，解决未封闭图形的建模问题和交叉点的问题。

If the continuous, come and go underway observation has been done recurrently by ADCP at the section which close the doorway of the bay among at least26 hours,a series of flux of the bay could be obtained and the storage capacity for tidal water of the semiclosed bay could be computed direc -tly.

文章推荐了一种半封闭海湾纳潮量的直接观测方法，主要利用ADCP在封闭湾口的观测断面上进行周期性的往还式周日连续走航观测，通过观测到的湾口流量变化序列直接计算海湾的纳潮量。

China has achieved three historic transitions: from a highly centralized planned economy to a dynamic socialist market economy, from a closed or semi-closed society to a fully open one, and from a state of mutual estrangement with the rest of the world to one of close interactions.

中国实现了从高度集中的计划经济体制向充满活力的社会主义市场经济体制的历史性转变，实现了从封闭半封闭到全方位开放的历史性转变，实现了同世界从相互隔绝到利益密切相联的历史性转变。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。