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For adjusting and optimizing spark advance angle of SI engine and improving power density and fuel economy and reducing exhaust emission, an electronic control ignition system applied to GDI engine was developed in this paper.

为了对火花点火发动机的点火提前角进行调整优化，本文开发了一种适用于直喷汽油机的电控点火系统。

Innovative automobile electronic ignition control system is based on the characteristic curve MAP of ignition advance angle to control data,and the insertion value algorithm and changing index exponent curve surface fitting algorithm are chosen dynamically.

新型汽车电子点火控制系统是以点火提前角的特性曲线MAP图为基础控制数据，动态选用插值算法和变阶曲面拟合算法。

In this paper, based on the specific CNG engine parameters and characteristics, the influence of the injection timing, ignition energy and lean combustion for the engine is tested, in order to explore the control rules of fuel injection, ignition energy and lean combustion and then draw the following conclusions: small injection advance angle of electronic controlled injection CNG engine is optimum

文章根据天然气发动机的具体参数和特性，探索电控喷射CNG发动机在燃料喷射、点火能量和稀燃等方面的控制规律，确定最优的控制参数，开展了喷射定时、点火能量及稀薄燃料等参数对发动机性能影响的试验研究工作，并根据试验结果分析，得出了以下结论：电控喷射WT615CNG发动机燃料喷射提前角要小些为宜

It has such functions as fuel injection controlling, air fuel ratio controlling full electronic ignition angle of advance controlling, idle stabilization controlling, fuel steam controlling, self diagnosis safety and it′s good in acce...

提高了发动机的输出功率以及整车的动力性和经济性，实现了对汽车发动机各种工况的实时控制，进一步降低了有害气体的排放。

So there need not only no failure but working in a stably good condition in the ignition system, the using condition and adjust of the use factors are the most important thing for the system performance. The paper analyses the characteristics of electronic ignition system, points out that determinant use factors are mainly the voltage of battery, the occupy-emptiness rate of the ignition signal, the clearance of spark plug, the resistance of high-voltage part, and the cam angle of spark advance.

本论文重点分析了电子点火系统故障特征，论证了决定电子点火系统性能的使用因素主要有电瓶电压、点火信号发生器发出电压信号的占空比、火花塞间隙、高压阻抗、点火提前角，这些因素在点火系使用过程中故障率占点火故障比例最大，故障出现的频率最高，而且有时常因维修调整不当导致点火系统性能变差。

The mutual interference problem between the components caused by the limitation of the intersection angle of the incident light beams and the dissymmetry of geometrical arrangement is solved by a data processing system composed of electronic mixer and data solver.

由电子混频和数据解算装置所组成的数据处理系统，解决了由于入射光束交角的限制及几何布置不对称性所造成的分量间相互干扰问题。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

The degree of electronic angle measurement are mainly coded dial plate, grating angle measurement dial and dynamic disks in three forms.

电子测角的度盘主要有编码度盘、光栅度盘和动态测角度盘三种形式。

The results of UV absorption show that λ max is not sensitive to the electronic effects exerted by the substituent in the coupler moiety. The λ max has a small red-shift when the anilide aromatic ring in the coupler moiety is larger. This indicates that the conjugation effect of the anilide ring with chorosorb is not very significant. It is important to note that a red-shift of 60-130 nm was observed when the coupler component changed from a 2-hydroxy-3-naphthanilide to a 2hydroxy-11H-benzocarbazole-3-naphthanilide coupler. The red-shift may be due to the conjugation resulting from the carbazole ring.

对上述三个系列偶氮染料吸收光谱的研究结果表明，偶合基酰胺芳环共轭环的扩大对偶氮染料在可见光区最大吸收红移作用不是很显著；当偶合基萘环上共轭环扩大了一个咔唑环后，其偶氮染料在可见光区的最大吸收大幅红移，跨入近红外染料行列，这一结果对红外偶氮染料的设计合成具有重要的参照价值。

A series of anorthite/glass composites were prepared using electronic ceramics process.

采用电子陶瓷工艺制备了一系列钙长石/玻璃复合材料，并对复合材料进行X射线分析、扫描电镜观察和性能测试。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。