超高

This paper presents the high precision simulation for the truck-viaduct impact based on high performance nonlinear finite element analysis. And the influence of truck speed to the damage of the bridge is discussed.

本文基于高性能非线性有限元，对超高车辆－立交桥碰撞进行了高精度仿真分析，并对不同车速导致的桥梁损害情况进行了讨论。

Based on the practice of the use of φ95mm subsurface sucker rod pump in Shengtuo Oilfield in recent years, the causes of the failure of the pump are analyzed, and relevant precautions are put forward:(1)selecting oil wells with sufficient fluid supply for pumping;(2)under the condition of the pump efficiency being the same, the submergence depth of the pump being somewhat larger than that of the small pump, and 450～500m being feasible;(3)adopting Grade H ultrahigh-strength rod string and fixing a sinker bar at the bottom of the rod string;(4)selecting long stroke and low pumping speed, and more than 5m stroke and less than 6min-1 pumping speed being recommended;(5)adopting zirconium oxide valve ball and seat ＋ spray welded plunger ＋ nitrided barrel.

根据胜坨油田近几年采用φ95mm有杆抽油泵提液的实践，分析了造成这种抽油泵失效的原因，包括与其配套的脱节器失效、抽油杆断脱、泵漏、电动机不配套和生产管理不善等。为增强泵的提液能力和工作可靠性，提出5 项预防措施：(1)选择有充足供液能力的油井；(2)在保持相同泵效的情况下，泵的沉没度应略大于小泵，推荐按450～500m设计；(3)采用H级超高强度抽油杆柱，并在杆柱底部配置一定重量的加重杆；(4)采用长冲程、低冲次的参数匹配，推荐光杆冲程大于5m，冲次小于6min-1；(5)为提高泵筒、活塞和阀座的防腐耐磨性，推荐采用&氧化锆阀球和阀座+喷焊柱塞+氮化泵筒&的结构形式。

The primary objective is to study the effect of high-modulus PVA fibers on improving the seismic performance of super-high-strength concrete short column s with high axial pressure ratio.

试验旨在研究在较高轴压比条件下，高弹模PVA纤维对超高强混凝土短柱抗震延性的改善作用。

The results indicate that 30CrMnSiNi2A steel is sensible of strain rate, and dynamic compression leads to shear failure with the angle 45°.

运用SHPB实验研究超高强度钢30CrMnSiNi2A在应变率500~5000s^(-1)时的应力应变关系，并对典型试样进行了金相观察。

The scaffolds with great height, size and weight are used widely in these large span and self-weight constructions.

这些特殊混凝土结构通常空间跨度和自重都很大，使得在施工中超高、超大、超重的梁板模板支撑架被频繁使用。

The School's ranking in the 2001 Research Assessment Exercise puts us amongst the top research universities in the country; 10 SOAS departments were awarded the highest scores of 5 and 5*.

学术优势在 2001 年的科研评估活动显示本校是全国最优秀的研究学院之一，学校有10门学科获得 5 或 5*的超高评价。

The high roof contour line provides excellent headroom for the front and rear passengers.

超高车顶轮廓线，为前后座乘客都提供了宽广的头顶空间

UHMWPE pipe is extensively used of the transportation of all kinds of powder、thick liquid and gas,such as the handing of mine powder 、grain、river course silt,and ash discharging of power plant、utilization of water of sea ang river、drainage of mine well、and the transport of cruel oil and gas,and also in the fields of the convey of chemical raw material and industry"three wastees"etc.

超高分子量聚乙烯管材广泛应用于各种粉体、浆液、气体的输送，如矿粉、粮食、河道泥沙处理、电场排灰，海、河水利用、矿井排水，油品、燃气输送，化工原料及工业&三废&的输送等领域，可代替铁管，钢管，不锈钢管和合金钢管。

For decades, researchers have dreamed of building hypersonic aircraft that could whip around the world in just a few hours.

几十年来，研究人员一直梦想着制造出在几个小时内就能绕地球飞行一圈的超高音速飞行器。

Few cars carry as much prominence as the Bugatti Veyron, famous for its ultra-high price tag, striking looks and other-worldly speeds, but there will always be demanding customers wanting more.

几部赛车完成了突出的布加迪威龙，著名的超高价格，外观和其他现世的速度，但总是会有更多的客户需要。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。