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The engine CA6102 bench test results show that fuel carrying charge to assist atomization decreases largely HC content and CO content of engine exhaust emission, and economize a little fuel. It is a new method for automobile to make fuel electrified to improve mixture quality.

在CA6102发动机台架上进行了试验,结果表明,燃油带电荷辅助雾化的方法可以大幅度地降低HC和CO的含量,同时对油耗也有一定程度地降低,为在发动机上节能降排提供了一种新的方法。

This thesis contributes to geometry compression in the following aspects: Proposes a method of progressive spherical mesh parameterization based on local parameterization by directly projecting the deleted vertices to its neighborhood. Based on spherical mesh paramterization, an adaptive subdivision remeshing method by progressivly redistributing of sampling points is proposed, by this means, the main geometry information of the original mesh can be captured with only a small amount of samples, it can also be used in mesh simplification. By regarding attributes binded on mesh vertices as geometry signals and transferring them onto a uint sphere by means of spherical mesh parameterization, meshes with different attributes are compressed with spherical wavelet successfully with high compression rate. As a kind of lossy geometry compression technique, two mesh simplification algorthimes are also presented in this thesis.

归纳起来,本文的主要贡献有:提出了以直接投影局部参数化方法为基础的网格累进球面参数化方法;在网格球面参数化方法的基础之上,提出了一种基于累进优化布点方案的网格细分采样方法,该方法可以用很少的采样点就可以捕获到网格的主要特征,因此我们也将其用于后面的网格简化工作当中;通过将网格顶点上定义的各种属性看成几何信号,并以网格球面参数化为手段将几何信号迁移到单位球面上,从而成功地实现了用球面小波对各种几何信号的压缩;作为一种有损压缩方法,本文还提出了基于统一距离的网格简化算法和基于重采样的网格简化算法。

In order to preserve more details while erasing mixed noise, a new algorithm based on the structure of modified trimmed mean filter was proposed. Characters of the new one are: 1 replaces the median filter with center weighted median which shows better performance in preserving details; 2 uses the filtering result to estimate the deviation of Gaussian noise. The estimating result is used to change the filter parameter, so the new algorithm is robust.

为了在滤除退化图像中混合噪声的同时能更好地保护图像的细节,文中提出了基于改进均值滤波结构的新算法,其特点为: 1)用中心加权中值滤波算法替代MTM 方法中的中值滤波算法以更好地保护细节; 2)提出了一种直接利用滤波结果来估计混合噪声中高斯噪声方差的方法,估计的结果被用于滤波器系数的调整,使得新算法有很好的鲁棒性。

A series of theoretical and experimental studies on the microstrip patch antennas with dielectric superstrates is carried out systematically. Firstly, a comprehensive survey of the microstrip antenna technology and its theories are presented. Then, two analysis techniques, named as the spectral domain Green's function method and the spectral domain integral equation method are developed. The SDGF method is a simplified analysis technique, which takes advantage of the spectral domain immittance approach to find the dyadic Green's function for the stratified media, and obtains the complete closed-form formulas for radiation patterns, directivity, efficiency, gain etc. Some interesting calculated results are presented. The SDIE method is capable of determining resonant frequency, radiation characteristics, input impedance etc, for the covered microstrip patch antennas. Comparing with other full-wave analyses it reduced computation and mathematical labour remarkably. The singularities near the pole location of the surface-wave modes and the difficulty of the integral computation over infinite range of oscillating integrands are dealt with actively and documented well. Results predicted by the SDIE method agree extremely well with our experimental results for resonant frequencies of various superstrates. The superstrate effects on impedance and radiation characteristics also have been investigated experimentally so that the gap due to lack of measured data and computed results for multi-layered superstrate has been filled to some degrees and two useful observations have been achieved for weakening the resonant frequency shift and optimizing the microstrip antenna gain. As a meaningful application, the design and analysis of a 4×4 patch array are introduced.

实用微带天线普遍加介质覆盖层来防护热,物理损伤和环境影响,也可能在飞行或严酷气候条件下自然形成覆盖层本论文对带介质覆盖层的微带贴片天线系统地作了一系列理论和实验研究首先,对微带天线技术和理论作了全面的综述然后,发展了两种分析方法,称为谱域格林函数法和谱域积分方程法SDGF法是一种简化的分析技术,它利用谱域导抗法来求得分层媒质的并矢格林函数,并得出方向图、方向性系数、增益等参数的完整的闭式公式,给出了一些令人感兴趣的计算结果SDIE法能确定介质覆盖微带天线的谐振频率、辐射特性和输入阻抗等与其它全波分析方法相比,它明显减小了计算量和数学工作量已有效地处理了表面波模极点附近的奇异性和对振荡的被积函数的无限区间积分计算的困难对于不同覆盖层情况下的谐振频率,由SDIE法所预示的结果与我们的实验结果吻合得很好对于覆盖层对阻抗和辐射特性的影响也已作了实验研究这在某种程度上填补了缺少实验数据和计算结果之间的间隙,并得出了缓解谐振频率偏移和优化天线增益的两点有用的结论作为有意义的应用,介绍了一个4×4元矩形贴片天线阵的设计和分析。

The paper analyses material transportation problem and give the solvable methods; analyses delivery vehicle route problem, and then construct its corresponding mathematical model and present a heuristic algorithm based on C—W algorithm; analyses the optimum scheduling problem of trucks, and then construct its corresponding mathematical model and put forward a new algorithm; analyses the Postal Transportation Problem which will perhaps be used in supply chain of manufacturing system, and then construct its corresponding mathematical model and present an approximation algorithm.

分析了制造系统供应链中供需平衡、供需不平衡、有转运等各种情况下的物资调运问题,给出了求解方法;分析了制造系统供应链配送作业中的配送车辆路线问题,建立了相应的数学模型,提出了一种基于C-W算法的启发式算法,该算法较好地解决了有时间约束的配送问题;分析了制造系统供应链中的货运卡车优化调度问题,建立了相应的数学模型,提出了一种基于表上作业法的求解算法;分析了制造系统供应链中有潜在利用价值的邮政运输方式问题,在详细描述了该问题的基础上,建立了相应的数学模型,提出了一种近似求解算法,该算法较好地解决了邮政运输方式这样的多种物流、多种运输方式,有严格时限和众多外部约束的特大型、复杂、并行的交连系统的计划调度问题。

The methodology classified the objects of module partition to improve the flexibility and maneuverability. In addition, the methodology focused on research of module partition method, which faced the category of "modular transformation of the existing products ". The methods commendably meet the current needs of enterprises and have strong practical significance. In the end, presented the corresponding mathematical methods.

针对两类方法的优缺点,提出了一种柔性化模块划分方法,该方法突出了模块划分的对象分类,在提高划分方法柔性的同时,也更具可操作性;并着重研究分析了"面向已有产品模块化改造"范畴的模块划分分组方法,并明确了相应的谱系聚类数学方法,该方法较强地适应了当前企业的设计需求,具有较强的实践意义。

Make use of HPLC, can availably classify true or false D-calcium pantothenate, the D-calcium pantothenate sample diagram and standard diagram have similar diagram in same reservation time, the content meets provision;The false D is mainly depend on adding calcium inorganic salt, urea and glucose etc, to make specific optical rotation, calcium content, nitrogen content to attain a nation standard, but these material in the same reserve time have never absorbed diagram to make peak area very small, the content of external standard be low.

本文以市售D-泛酸钙为样品(山东新发药业有限公司生产),对所建立的检测方法进行了验证,通过精密度、准确度和标准曲线等验证项目的实验,结果表明,本文所建立的D-泛酸钙的高效液相色谱检测方法可以准确地检测产品的含量;利用液相色谱图谱,可以有效地区分真假D-泛酸钙,D-泛酸钙样品图谱与标准品图谱在相同的保留时间处,有类似谱图,含量符合规定;搀假的泛酸钙主要靠添加无机钙盐、尿素和葡萄糖等使比旋度、钙含量、氮含量达到国家标准,但这些物质在此处无谱图造成峰面积很小,外标含量低。

In this thesis, three major achievements were made in theoretical study: conditions and rules for preparing nano-powders by chemical precipitation are analyzed from the point of view of thermodynamics and kinetics, the principle, standards and experimental method for the aqueous dispersion of nano-scaled metal oxide powders were proposed and verified, mathematical model of nano-filming addition of dopants by chemical coprecipitation was established. In experimental research, nm-ZnO, nm-Bi〓O〓, nm-Co〓O〓 and nm-MnO powder with spherical shape, narrow particle size distribution and small particle size were prepared successfully, highly stable and dispersive aqueous suspensoid of nm-ZnO, nm-TiO〓, nm-Co〓O〓 and nm-MnO powder were prepared successfully and surface modification on these nano-powders was also achieved, 0-3 nanocomposite ZnO varistors with nm-ZnO, nm-TiO〓and nm-MnO respectively were prepared successfully by conventional mechanical attrition, and exhibited much better electrical properties than those of conventional varistors.

综上所述,本文在理论研究方面取得了三项成果:(1)从热力学和动力学角度推导并分析了液相化学沉淀法制备纳米粉体的反应条件和规律,(2)提出了纳米氧化物的水分散体系的设计原理、规范和通用实验步骤,(3)提出了共沉淀的数学模型和计算方法;在实验方面所取得的成果有:(1)成功制备了粒度小、分布窄、形貌对称的纳米氧化锌、纳米氧化铋、纳米氧化钴和纳米氧化亚锰,(2)成功地制备了纳米氧化锌、纳米二氧化钛、纳米氧化钴和纳米氧化锰的高稳定分散悬浮液并实现了干粉体的表面改性,(3)成功地进行了纳米氧化锌、纳米二氧化钛和纳米氧化锰对压敏电阻的0—3复合掺杂实验,试样性能远优于常规压敏电阻,为实现压敏电阻的高能高压化提供了新的方法和思路。

Dye can bring a little color to life, most clothing is color with dyes, modern manufacture dyes can be costly, natural dyes from plan t and animal products have been used since ancient times, so this week, we describe by natural way to dye world, the advice comes from information written by Jenny Tim of the intermedial technology development group in Briton, this anti group is now called practical action, there are several messages to put dye onto material, the vent message for example, can be used to dye wool with onion skins, for this example, use 100 grams of natural wool, the wool must be clean, leave it overnight in water and liquid soap, then wash it with clean water that is a little warm, gently out the water, a solution called a moderant is used in the dying process, a moderant helps fix the dye to the material, traditionally moderants were found in nature, wood ash is one of example, but chemical moderants such as ironare popular today, iron is so would in many stores, it is often mixed with queen of daughter, a finding powder commonly used in cooking.

使用染料可以为生活带来更多的色彩。许多的布料都是通过染料来上色的。现代工业制造的染料通常都非常的贵,从古时起,人们就知道从植物或者动物产品中提取天然染料。这周,我们就来讨论一下如何用天然的方法来给羊毛着色。这一建议来自英国中级技术发展组的Jenny Dean的信息。这一古老贫穷的小组现在被称为实用性活动。把染料加到材料上有几种方法。其中之一是大桶法。举例来说,就是用洋葱皮来染羊毛。这一例子中,用100g的天然羊毛。羊毛必须清洗。用液体肥皂浸泡过夜。然后用温的干净的水冲洗它。轻柔地把多余的水分压挤出来。一种叫做媒染的溶剂也用于染洗过程。媒染是用来固定染料和材料的。传统的方法是,媒染是来天然的,比如木灰。但是像明矾这样的化学媒染在今天也是很流行的。明矾在许多商场都有出售。它通常和一种经常被用于烹调的粉状物-酒石混在一起。我们用多一点点的辛苦,来交换多一点点的幸福

With the methods of experimental comparison and mathematical statistics,this paper makes the comparison between Star teaching model and traditional model.The main purpose is to discuss the better teaching model with the comparison,analysis,and induction of statistical data in three tests.The results show that there are more validities and rationality of Star model in the aspects of the effect of study,quantification of teaching,comparative analysis.

经过文献资料的比较和分析,现代定向越野运动无论在技术教学的基本观点上还是在技术的外形和内涵上都有了新的变化和发展,但方法还是比较单一,且大部分采用的是定性分析方法,分析体能、技能的构成、比重时只着眼于整体,一定程度上不够确切,不能细化地作定量描述,因而,学生对技术的分析、认识也必然带有相对的模糊性,不可能从技术的本质上作深入的分析,进而有效地解决问题。

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推荐网络例句

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。

There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.

双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。