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Characteristics of Lean-burn combusting of this CNG engine were studied experimentally.High performance in fuel economy and emissions was acquired.

为保证混合气在较大空燃比情况下的充分燃烧和发动机的稳定运行，需采用空燃比的精确控制和高能点火，并需解决气体燃料发动机普遍存在的功率下降问题。

Then, safety analysis method was constituted considered the typical damage of concrete beam bridge. 5. By amending the reduction rate of loading capacity used in Code for Maintenance of Highway Bridges and Culvers (JTG H11-2004), a new reliable index is presented in the same safety standard to reflect the relation between load and resistance. According to the basic principal of calibration method, the recommended gradation index was computed under various factors such as different load combinations, vehicle operating status and different failure modes. With these calculated numerical values, the calculated reliability indexes standard for the estimation of safety degree of in-service concrete girder bridge members was ultimately obtained.6. Based on the related standards and results on crack and displacement that cannot continue to loading at home and abroad, the evaluation grade of the concrete beam bridge is proposed by analogy.

针对材料和构件损伤对混凝土梁式桥抗力的影响，基于材料和构件层次典型损伤的修正计算公式，在结构既有以及时变抗力评估的概率模型基础上，通过误差传递公式获得抗力统计参数，对抗力进行修正，构成了考虑混凝土梁式桥典型损伤的安全性分析方法。5、依据校准法原理，将《公路桥涵养护规范》(JTG H11-2004)中不同类别承载力下降率转化为修改分项系数，分别计算了轴心受压、轴心受拉、受弯、大偏心受压、受剪构件在各种情况下的可靠指标，根据破坏类型对校准结果进行分析，提出了基于可靠度的公路混凝土梁式桥安全性评定等级。6、基于不能继续承载的裂缝和位移的相关国内外规范和研究成果分析，通过类比提出了混凝土梁式桥不能继续承载的裂缝和位移评定等级界限。

These diseases are sexually spread, which means the germ that causes the disease has to come from somewhere -- and that somewhere is an infected partner.

性传播这些疾病，意味导致的毒菌疾病(在艾滋病情况下的HIV)必须来自某处--并且那某处是一个被传染的伙伴。

When cooperated with direction component, impedance component and phase selector, It can improve the sensitivity of protective relays used for transmission line on same tower effectively when simple fault occurs.

通过与方向元件、距离元件和选相元件的配合，可以有效提高配置于同杆输电线路的保护在简单故障情况下的灵敏度。

Simulation results show that both the longitudinal and transverse wave are included in the reflected waves,the reflection coefficient of longitudinal wave augments with the increase of the incident angle,and the reflection coefficient of transverse wave augments first and then minishes,the transverse wave disappears when the incident angl.

主要研究了声波从粘弹性介质向流体介质斜入射情况下的声反射特性，分析表明：反射声波中有横波和纵波同时存在，纵波声压反射系数随入射角度的增大逐渐增大，横波的声压反射系数随入射角度的增加先增大后减小，在垂直入射时只有纵波，而没有横波存在。

The experimental velocities cover subsonic,transonic and supersonic flows,and the content includes:(1) flow over flat plate,revolution body and wing with riblets surface at zero angle of attack;(2) the effect of pressure gradient,angle of attack and slide angle;(3) the burst characteristics,characteristics of turbulence,the streak structure in the near wall region and the drag reduction mechanism.

内容涉及沟槽面平板、旋成体、机翼等在压、跨、超音速流动情况下的实验研究成果；压力梯度、攻角、侧滑角等的影响；湍流猝发特性、紊动特性、近壁区带条结构的特征及减阻机理等方面的工作。

Any content in the current line before a floated box is reflowed in the first available line on the other side of the float.

浮动元素之前的元素则会重新被排列，占据独立的一行。（译注：ie 和 ff 在这种情况下的表现不尽相同）

The operating pinch point was studied for a given HEN, and the change of operating pinch point was qualitatively analyzed.Bypass optimal control was proposed and the bypasses were placed around the operating pinch point.

本文从操作的角度求解并分析换热网络结构已定或网络正在运行情况下的操作夹点，定性分析操作夹点的变化规律，并提出在操作夹点附近设置旁路实现网络的旁路优化控制，从而将夹点技术应用于换热网络旁路优化控制中。

Aimed at finding out the measure effect of fiber grating sensor under different loads, the Pushover and pseudo static experiment were carried out for three reinforced concrete bridge pier models; the strains of the steel bar and concrete as well as horizontal displacements on top of the model were measured simultaneously by using the fiber grating sensor and the strain gauge (9 groups measure contrast tests).

针对光纤光栅传感器在不同受力情况下的测量效果，选取了3个分别采用Pushover和拟静力加载的钢筋混凝土桥墩模型，运用光纤光栅传感器和电阻应变片及电阻位移计，对模型的钢筋和混凝土应变及顶部水平位移进行了同步测量（共9组测量对比试验）。

This paper discusses the model of secondary water-supply system that can take advantage of the energy in the muicipal pipeline and its tactics of pumping water .

着重讨论利用市政管网压强能量的二次供水系统在理想情况下的用水模型以及相应的抽水策略，为实际用水模型的建立提供理论依

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。