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Furthermore, bad economic loss and social effect can be brought about. As a result, it is an urgent realistic problem that land subsidence induced by tunneling is forecasted and controlled so as to ensure the safety of close-by building and buried pipeline.

因此,如何在隧道施工过程中防止坍塌并可靠地预计和有效地控制施工所引起的地面沉陷以保护工程沿线建筑物和地下管线的安全,已成为城市地铁工程建设中必须解决的一项重要课题。

PbWO4 and CeF3 which are newly developed inorganic scinti1latr in our country have been studied. Photo-electricity detector systemes which have high γ sensitivity and relative insensitive to neutron and fast time response were assembled by using CeF3 and photomultiplier tube. The ratio of signal-to-noise for γ ray detection can be up to more than 10 times in close distance n,γ commix pulse radiation field by using this detector system.

对PbWO4和CeF3等近年国内新研制的无机闪烁体进行了系列研究,使用CeF3分别配光电倍增管和光电管,组合出了对γ辐射灵敏度高,对中子相对不灵敏,同时脉冲响应也快的光电探测系统,应用以此为基础的探测技术在近距离n,γ混合脉冲辐射场中,可将脉冲γ辐射探测信噪比提高一个量级以上。

This is a raw image taken by the Cassini spacecraft during its close fly-by of Saturn's moon Iapetus, Sept.

这是一张绕土星飞行的自然卫星--爱泼特斯卫星的原始图像。2007年9月10日,卡西尼太空飞船在飞过爱泼特斯卫星时拍摄到的。

This project studies the scale-dependent deformation behavior of the metal matrix composite, the void nucleation and void growth mechanisms at the micron/submicron scale. The main results are:(1) In prophase, growth and coalescence of the void embedded in the graded matrix are analyzed in detailed;(2) Based on the infinite solid model containing a micro-void, coupling effects of the void shape and the void size on the void growth are studied carefully, the results show that it seems to exist a critical equivalent void radius, which is associated with the material length. When radius of a microvoid is close to or smaller than the critical void radius, the micro-void growth rate is essentially eliminated;(3) The coupling effects of the particle shape and size on the mesoscopic stress fields within the particle and matrix are also investigated by introducing the conception of inclusion/matrix interfacial energy. The results show that the stress concentration factors within the particle and on the matrix/particle interface are also strongly size-dependent,so the void nucleation mechanism is size-dependent.(4) By employing a specific orthogonal curve coordinate frame and a 'kernel function' conception, a 'unified method'solving the spheriodal and spherical void problems is suggested; by this unified method, size-dependent plastic potentials of the porous materials containing the spheriodal or spherical voids are obtained, which extend the traditional Gurson model for the spherical void and GLD model for the spheriodal voids to the micron scale.(5) Based on the RVE model containing the spheriodal or spherical particles, the influences of the particle shape and size on the size-dependent mechanical behavior of metal matrix composite are studied.

中文摘要:本项目对金属基复合材料在微细观尺度下的尺度相关变形行为、孔洞形核及长大的机理和模型进行了研究,取得了如下主要结果:1)在前期研究中,探讨了基体的梯度分布对孔洞长大和聚合的影响;2)基于含孔洞的无限大体模型,探讨了孔洞形状和孔洞尺寸对其长大的耦合作用,结果表明:可能存在一个与材料特征长度相关的临界孔洞尺寸,当椭球孔洞的等效半径小于临界孔洞半径时,孔洞的长大受到明显抑制;3)通过引入基体/夹杂界面能的概念,分析了夹杂尺寸、夹杂形状对材料细观应力场的耦合影响,结果表明:颗粒内部和界面上的应力集中因子强烈地依赖于夹杂的尺寸和形状,因此,孔洞的形核机理是尺寸相关的;4)采用一种特殊的正交曲线坐标系和引入"核函数"的概念,"统一"地得到了含椭球和球形孔洞的材料的尺寸相关塑性势,它将传统的Gurson球形孔洞模型和GLD椭球孔洞模型推广到微尺度范围;5)基于含椭球和球形夹杂的体胞模型,初步研究了夹杂形状、夹杂尺寸对金属基复合材料尺寸相关力学行为的影响。

Qianlong 58 years, 100 chrysanthemum brook holds the position of Zhejiang to make by examine, as viceregal as Hangzhou Li Xiaoyuan is original very be close friends, because bagatelle was troubled by,contradict on occasion.

导读:乾隆五十八年,百菊溪担任浙江按察使,与杭州太守李晓园本来很要好,偶而因小事闹了矛盾。李晓园大为恼火,以至一个月都不去禀见百菊溪,之后还要推托有病辞职返

Magnetic properties of 2J4 alloy by ECAP is hetter than those by cold rolling, ECAP makes the grain of alloy fined and close to single magnetic domain.

由于ECAP方式使晶粒细化,达到或接近单畴结构,使得2J4合金的磁性能优于冷轧条件下的磁性能。

This showed an issue: Because regulation changed now,Baidu depilates is, the Baidu of pure picture content did not close, and collect by Baidu picture, because of although this is depilated by Baidu, but the discharge that my station brings through Baidu picture did not change.

这就说明了问题:百度拔毛是因为现在规则改了,纯图片内容的百度不收了,而由百度图片收录,因此虽然被百度拔毛,但我的站通过百度图片带来的流量没有变化。

There are four seasons in the mind of man: He has his lusty Spring,when fancy clear Takes in all beauty with an easy span: he has his Summer,when luxuriously Spring's honeyed cud of youthful thought he loves to ruminate,and by such dreaming high Is nearest unto heaven:quite coves His soul has in its Autumn,when his wings He furls close;contented so to look On mists in idleness-to let fair things Pas by unheeded as a threshold brook.

春夏秋冬把一年的时间填满,人的心灵也包含着四个季节。在他朝气蓬勃的春天,那清晰的幻想在一瞬间就把所有的美轻易囊括。在他的夏天,他喜欢用年轻思想把春天里采的花蜜反复品位,细细欣赏那蜜汁的甘甜芳香,乘着这高远的梦想冲天而飞。他心灵的秋天有如小湾安谧,这时他心满意足地收拢翅膀,悠闲地凝视着雾色--而美好的事物犹如门前的小溪悄然而逝。

Speed and tension control of two-motor variable frequency speed-regulating system can be decoupled by the neural network inverse synchronous control method, and high performance control can be obtained by designing linear close-loop adjustors of speed and tension.

实验结果表明系统具有较好的动、静态性能和较强的抗负载扰动的能力,提出的神经网络逆同步控制方法为解决交流多电机系统解耦控制的难题提供了新思路。

The Dealer shall have the right whenever in the Dealer's sole discretion, the Dealer shall consider it necessary for the protection of the Dealer, because of margin requirements or otherwise, or, in the event that a petition in bankruptcy, or a petition for the appointment of a receiver, is filed by or against the Client or, when an attachment is levied against the account of the Client with the Dealer, or, in the event of the death or judicial declaration of incompetence of the Client, to: satisfy any obligation the Client may have to the Dealer (either directly or by way of guaranty or suretyship) out of any property belonging to the Client in custody or control by the Dealer, sell any or all positions long in the Client's account, buy any or all positions which may be short in such account, and, cancel any outstanding orders in order to close the account or accounts of the Client, all without demand for margin or additional margin, notice to the Client, the Client's heirs, executors, administrators, legatees, personal, representatives or assigns, of sale or purchase or other notice or advertisement and whether or not the ownership interest shall be solely the Client's or jointly with others.

当交易商按其全权酌情决定权认为基於按金需求或其他原因而有必要保障交易商,或客户提出或被提出破产或委任破产管理人之呈请时,或客户在交易商之账户被扣押时,或客户死亡或法庭宣布无行事能力时,则交易商有权:以交易商为客户保管或控制之任何属於客户之财产偿还客户直接或以保证或担保形式所欠交易商之任何负债,沽售任何或全部客户账户内之买空位置,买入任何或全部有关账户之沽空位置,及取消任何未执行之交易指示以结束客户之账户。以上行动均毋须要求按金或要求增加按金,亦毋须向客户,客户之继承人,遗嘱执行人,遗产管理人,遗产继承人,个人代表或承让人发出买卖通知,其他通知或公布,不论客户是否独自拥有或共同拥有有关业权。

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Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特,那个是爱朗。

Articulate the aims, objectives and key aspects of a strategic business plan.

明确的宗旨,目标和重点战略业务计划。