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 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。 
The level control system of SG plays an important role which effects the reliablity, safty, cost of SG and its mathematical models have been solved.


The safty, rationality and the practicality of enteral nutrition (EN) support in the postoperative patients with damaged hepatic function were investigated and the protective effect of EN on the gut barrier and the clinical implication studied.


The picture also shows a low rectal ulcer and the distal safty margin.


In summary, this study shows that the curative effect and safty of domestic olsalazine sodium is superior to SASP in the treatment of chronic UC.


Befor any use, confirm the following articles for the safty operation.




 Th tentative idea in this paper is to explore the applicability of the concept “probability fracture”in design.In strict sense,the safty factor used in conventional design has become confused.In fact,the fracture toughness K(?) of a material and the stress intensity factor are both the functions of random variables,so it would be appropriate to consider the fracture criterion and fatigue crackgrowth path as random variables and stochastic process.The reliability is accordingly considered as the probability... Th tentative idea in this paper is to explore the applicability of the concept “probability fracture”in design.In strict sense,the safty factor used in conventional design has become confused.In fact,the fracture toughness K(?) of a material and the stress intensity factor are both the functions of random variables,so it would be appropriate to consider the fracture criterion and fatigue crackgrowth path as random variables and stochastic process.The reliability is accordingly considered as the probability of crack growth resistence K(?) exceeding srackgrowth drive K,i.e.R=P((?)>0)=integral from 0 to ∞(f(?)d(?))where (?)=K(?)K.when the functions,K(?) ahd K conform to the normal distributonR=1/(?)∫integral from _(μζ/σζ)to ∞ exP[Z~2/_2]dZthe fundamentel equation for reliability design isZ=μζ/σζ=(μ_(Kc)μ_K)/(?).In such a way the accurate exprssions for the mean and the standarddeviation of function of random variable K are obtained.In this paper,such kindof reliability analysis is sed for the leakversurerupture phenomenon of thinwalled pressure vessel of high strength steel with a surface flaw on it.The predicted rupture pressure is compared with the results of prototype rupture tests.The result shows the reliability design is better than the conventionalmethod.  本文尝试用可靠性设计概念去分析断裂力学K准则。在裂纹扩展阻力K_C 和裂纹扩展驱动力K 是服从正态分布的随机变量函敉的情况,将可靠性看作是裂纹扩展阻力K_C 超过裂纹扩展驱动力K 的概率。从而得出可靠性设计基本方程式。并导出了作为多元随机变量函数K 的均值和标准偏差的精确表达式。对有表面裂纹的高强度钢制薄壁压力容器“先漏后爆”进行了可靠性断裂力学分析、予测了爆破压力,并与全尺寸爆破试验结果进行了比较。证明了可靠性指标是优越的。  Recently the elastoplastic FEM has been used in many projects to analyze the destabilization process of concrete dams with their rock foundations containing soft interstitial materials. However the results show that it is difficult to assess the safty factor for designer's use by this method because no sharp turning can be found near the critical load on the DisplacementLoad curve.In stead of theelastoplastic FEM, the elastoviscoplastic FEM is suggested in thispaper to determine the safty... Recently the elastoplastic FEM has been used in many projects to analyze the destabilization process of concrete dams with their rock foundations containing soft interstitial materials. However the results show that it is difficult to assess the safty factor for designer's use by this method because no sharp turning can be found near the critical load on the DisplacementLoad curve.In stead of theelastoplastic FEM, the elastoviscoplastic FEM is suggested in thispaper to determine the safty factor in the stability analysis of concrete dams and their rock foundations. After a brief introduction of the elastoviscoplastic theory the corresponding constitutive law is introduced into nonlinear stress analysis. Some examples, are given with their results compared with those obtained by using elastoplastic FEM. The comparison shows that by means of the method suggested by the authors it is easier to determine the safty factor because of the high sensibility of the displacement to a very small load increment above the critical point on the DisplaqementLoad curve and more reasonable process of the development and linkingup of the plasticized zone can be obtained.  目前,许多工程都使用弹塑性有限元方法来分析基础中有软弱夹层的混凝土坝的失稳过程和安全度。然而计算结果表明:由于在用这种方法求出的荷载与位移的关系曲线上,临界荷载的位置往往难以确定,同时从应力成果也很难看出坝基中塑性区的发展以及塑化带逐步贯通的明确过程,因而难以为设计提供准确的安全系数。 本文建议用弹粘塑性有限元法求解抗滑稳定安全系数。在简述弹粘塑性有限元理论的基础上,本文把弹粘塑性本构关系作为非线性应力的计算手段引入坝体及其基础的抗滑稳定分析中,并把计算结果和弹塑性方法的结果进行了比较。比较表明:在用弹粘塑性方法求出的荷载与位移的关系曲线上,一旦超过临界荷载,对荷载的微小增量来说,位移增长幅度明显,因而能够为设计提供较精确的安全系数值,同时该法求出的塑性区及塑化带的发展贯通过程也更为合理。  A study on the dynamic response of a rockfill dam with reinforced concrete facing excited by earthquake by means of nonlinear finite element method was presented in this paper. The stability factor against earthquake was calculated from the static and dynamic stresses along the potential slide surface, thus, the history of stability safty factor for reinforced concrete facing and dam slope were obtained. The design history of earthquake acceleration was determined by modifying the recorded history of seismic... A study on the dynamic response of a rockfill dam with reinforced concrete facing excited by earthquake by means of nonlinear finite element method was presented in this paper. The stability factor against earthquake was calculated from the static and dynamic stresses along the potential slide surface, thus, the history of stability safty factor for reinforced concrete facing and dam slope were obtained. The design history of earthquake acceleration was determined by modifying the recorded history of seismic station near the dam site, while the modifying factor was depended upon the distance between dam site and effective fault. The design history was divided into time intervals, the iteration was taken within interval and going to next interval. The dynamic nonlinear behaviours were considered not only for rockfill but also for concrete, and the natural frequency of the structure was changed interval to interval. Thus, the nonlinear functions of this problem were considered more completely than other researchers.  本文采用动力非线性有限元法研究了钢筋混凝土面板堆石坝的地震反应,并用滑移面上的静、动应力求得坝坡抗震稳定安全系数时程曲线。根据坝址的地质构造,将实测的坝址附近震中地震加速度调整为设计加速度过程线。计算时,采用分段迭代的方法,不仅考虑了堆石的动力非线性性质,而且也考虑了混凝土动力非线性性质以及自振频率在振动过程中的变化,比较全面地反应了材料和结构的动力特性。   << 更多相关文摘 
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