预燃

This experiment studies the relation of ionic current signals and A/F ratio on different premixed pressure.

通过控制预混压力和空燃比两个参数变化，消除了由于发动机循环变动对燃烧状态和离子电流强度的不稳定影响。

The investigation has declared that the fuel injection with BQ fuel pump had higher injection pressure, bigger fuel supply rate and shouter fuel supply duration, which would cause the fuel injection quantity and the fule-air mixture to increase during ignition delay period, the pre-mixed combustion to become acutely, and finally result in increased power levels of noise.

研究表明，装配BQ喷油泵，喷油系统的喷油压力较高，供油速率较大和供油持续时间缩短，使得滞燃期的喷油量增加，滞燃期内形成的可燃混合较多，预混燃烧剧烈，导致整机噪声声功率级增加。

Secondly, the flow characteristic of the intake system of pre-mixed spark ignition gas engine was studied on the vacuum pump. The discharge coefficient models of the air valve, the gas valve and the subsystem of the mixer and throttle were modeled. Their working flow characteristics were analyzed. And the dynamic model of the intake system was identified.

其次，在真空泵流量实验台上完成了预混点燃式气体燃料发动机进气系统的流量特性研究，建立了空气阀、燃气阀及"混合器+节气门"子系统的流量系数模型并分析了其工作流量特性；建立了发动机外围进气系统的动态模型。

The present experimental investigation attempts to understand the suppressing effect of metal mesh construction on deflagration waves of premixed ethyne air mixture in unconfined space.

实验旨在研究金属丝网结构对开敞空间预混乙炔-空气爆燃波的抑制效果。

On the basis of composite solid propellants combustion model, we have modifiedthe surface structure factor of nitroamine propellants and a new function have be used tomodified the decomposition products of nitroamine according to predecessors researchfindings in combustion mechanism of nitroamine propellants, these work make originalmodel is indicated for a wide range of pressure and particle size.

2在原有的复合推进剂燃烧模型基础上，根据前人在硝胺推进剂及燃烧机理方面研究成果对硝胺推进剂表面结构因子f_进行修正，并引入ξ函数对硝胺的分解产物中的氧化性气体含量进行修正，使原有的燃速预估模型能适用于更宽的粒度及压力范围。

One eminent said a Word, he said: there is absolutely no one lives to people under the cdiv －－－－－－－.so we should overcome the psychological barriers, for the future of the things the arrangement, is a proactive approach to be brave to do what the organ donor, giving full play to the right of life Finally, after the death of useless, other organs, resuscation, for those unfortunate life were restriking hope, be a life

曾经有一位高僧说过一句话，他说：绝对没有一个救人的人还下堕地狱的。所以我们应该克服心理障碍，为未来的事情预作安排，才是积极进取的做法，要勇敢的做器官捐赠者，发挥生命最后的使用权，化无用的死后身躯、器官，抢救其他生命，为那些不幸者们重燃希望，做一个生命的勇者

The experimental results of burning rate and pressure exponents were compared with the calculated results of the combustion model.

燃速与压力指数的实验结果同燃烧模型的理论计算结果进行了比较，预估结果与实验数据符合较好。

Firstly, the principle and method of designing the combustion characteristics ofsmall grain-binding high-burning-rate propellant are analyzed and discussed, theburning behaviors and energy characteristic of the component content and binder andsmall grain propellant are respectively calculated by the estimating burning rateprocedure based on the chemical structure and characteristic of propellant, and theREALthermodynamics system software. The selection principle of component contentwhen designing the burning behavior and energy characteristic is analyzed.

首先，分析讨论了小球粘结高燃速推进剂燃烧性能设计原理及方法，采用基于推进剂化学结构与特征反应关系的燃速预估程序和REAL热力学系统软件分别计算了组分含量与黏结剂和小球药燃烧性能、能量性能的关系，分析了推进剂燃烧性能、能量性能设计时组分含量的选择原则。

By timely and spatially controlling the physical and chemical characteristics of the fuel at both port injection stage and in-cylinder direct injection stage, HCCI/DI stratified compound combustion is developed to combine the advantages of HCCI and conventional DICI on cycle-to-cycle basis and achieve clean and efficient combustion at full load ranges without misfiring and knocking.Firstly, three types of dual fuel including n-heptane/diesel, iso-octane/diesel and ethanol/bio-diesel a...更多re utilized to investigate the combustion and emission characteristics of HCCI/DI stratified compound combustion. The experimental results indicate that n-heptane/diesel HCCI/DI combustion presents a three-stage heat release consisting of HCCI low temperature heat release, high temperature heat release and diesel diffusive combustion.

本文提出的基于燃料设计与管理的HCCI/DI分层复合燃烧是一种将HCCI燃烧和传统缸内直喷压燃融为一体的新型燃烧方式，通过对燃料理化特性的设计和在预喷与直喷阶段从时间尺度和空间尺度上对均质和非均质混合气制备过程的控制和管理，在发动机的一个工作循环中将均质混合气的HCCI燃烧和非均质混合气的DICI扩散燃烧相融合，彻底消除了HCCI燃烧在小负荷失火和大负荷爆震的弊病，实现了发动机全负荷范围内的高效清洁燃烧。

The new substrate surface pretreatment that included the action of an oxidizing oxygen/acetylene flame with borax solution addition was studied on the base of methods of the WC-Co cemented carbide surface pretreatment.

在分析已有的硬质合金基底表面预处理的基础上，首次提出了用硼砂溶液和燃焰外焰的热量及其氧化性对基底表面进行预处理，抑制钴的副作用并降低基底表面温度，然后再利用内焰沉积金刚石的新方法。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。