机理

The results of the investigation showed that the best entrance angle of B〓C, B〓C/ C and Al〓O〓/ C ceramic nozzles is 11°, 14°and 16°respectively. Erosion wear model has been put forward. The B〓C and B〓C/ C nozzles exhibited a stress fatigue induced removal process under the condition of umber emery erodent impacting, and a brittle fracture induced removal process under the condition of white emery and SiC erodent impacting.

建立了不同磨损机理下的冲蚀磨损模型，提出了喷砂嘴的磨损属于多冲蚀机理并存的复合冲蚀机制。B〓C和B〓C/C陶瓷喷砂嘴在棕刚玉磨料的冲蚀下，主要表现为应力疲劳断裂冲蚀，在白刚玉和SiC磨料的冲蚀下，主要表现为脆性断裂冲蚀。

My research project is concerned with the mechanism of reactions of coenzyme NADH models with activated ethylenic compounds. Pross-Shaik treatment is employed to analyse the results.

本论文研究了辅酶NADH模型化合物和活化烯烃氧化还原反应的机理，并运用Pross—Shaik观点分析了这些反应的机理。

The results lent support to the concerted electron-hydrogen atom transfer mechanism for the formal hydride transfer in BNAH mediated reductions of activated ethylenic compounds.

我们也把反应的底物进行了拓展，对反应的机理进行了研究，找到了更多的证据说明了部分协同的电子转移和氢原子转移机理是存在的。

This Thesis consists of the following five pacts: Following a brief Introduction on the mechanism of reactions of coenzyme NADH models with activated ethylenic compounds is discussed. Pross-Shaik treatment is employed to analyze the results.

本论文研究了：(1)辅酶NADH模型物和活化烯烃氧化还原反应的机理，并运用Pross-Shaik构型混合模型分析了这些反应的机理；(2)用辅酶NAD~+／NADH模型物催化氧化一级和二级苄醇，还原α，β-环氧酮。

The hypercholesterolemic rats were selected to imitate early stage of human atherosclerosis The effects and mechanism of n-3 PUFA on endothelium were investigated with the following parameters: the morphological appearance and arrangement of endothelium stained by Ag, in vitro endothelium-dependentrelaxation of aortic ring, endothelial permeability test using Even′s Blue, blood lipid and body weight in one-week intervals, excitative and emissive spectrum of RBC membrane labeled by DPH (1, 6-Diphenyl-1, 3, 5-hexatriene), fluidity of RBC membrane, plasma and RBC membrane LPO

在整体和离体水平，选用大鼠高脂血症模型模拟动脉粥样硬化早期状况。用114只大鼠多指标着重研究n-3多不饱和脂肪酸在高脂血症状态下对内皮的保护作用，以探讨其预防动脉粥样硬化的机理。所采用指标包括：浸银法观察内皮细胞排列与形态；离体血管环观察内皮依赖性舒张；伊文氏蓝染料法观察内皮通透性。为探讨作用机理，进行了血脂和体重的动态监测、DPH(1，6-二苯基-1，3，5，乙三烯)标记红细胞膜的荧光光谱测定、红细胞膜流动性测定、血浆和红细胞膜脂质过氧化物测定。

It was also showed that Moxibustion and the combined treatment could not only promote the immune functions of tumor-bearing organism, but also exsert its influence on the biological characteristics of tumor cells, which gave a new scientific explanation to the traditional Chinese medicine theory of "supporting the energy of life to expell the evil factors" in the treatment of malignant tumors.

本工作的结果表明，进行针灸抗肿瘤的疗效和机理研究，不仅要考虑其对机体免疫功能的良性调整作用，同时还要着眼于其对肿瘤细胞生物学特性的影响，这样才能更全面地评估针灸的抗肿瘤作用及其机理。

Homochromy, Green-brown polyphenism and density-dependent body color polyphenism. The control mechanism of body-color polymorphism are environmental factors, endocrine control mechanism and heredity.

结果表明：昆虫体色多型可分为隐蔽色型、绿褐色多型及密度关联体色多型3种类型；其调控机理可分为环境调控、内分泌控制机理、遗传调控等。

ZnO, MgO and SiO_2 powders were covered on top of the alloy as dopants, the effects and principles of the dopants were discussed. Based these, SiC particles were made into preforms with different distribution of air holes by changing the granularity of SiC particles and the content of graphite additive, and the oxidation growth of aluminum alloy melt into the air holes within the preform was controlled to prepare SiC/Al_2O_3/Al composite with inerratic shape. And the SiC particles effect principle to the oxidation of SiC/Al2O3/Al composite was studied.

以ZnO，MgO和SiO_2为引发剂，覆盖在合金表面，讨论了引发剂的添加效果和作用机理；在此基础上将α-SiC颗粒制作成为预制体，通过改变SiC的粒度和石墨造孔剂的含量，调整预制体内部的气孔分布，控制铝合金熔体在预制体孔隙内的氧化生长，制备出形状规则的SiC/Al2O3/Al复合材料，同时研究了SiC颗粒的存在对SiC/Al_2O_3/Al复合材料生长机理的影响。

The reason which we study the Independent Window Access scheme is that: the IWA scheme makes the switching fabric have better performances than the DWA scheme.

文中之所以对独立窗口作进一步研究，是由于独立的窗口接入机理能消除采用传统的相关窗口接入机理时在输入缓冲器窗口中存在的队头阻塞现象。

The changes of the microstructure (using PAM treated with CH〓COOH) and the thermal decomposition mechanism of PbO〓 electrodes during formation were first studied. The oxidation model for leady paste particles was proposed and the thermal decomposition mechanism was found to be consistent during different stages of formation.

采用CH〓COOH处理活性物质，首次研究了化成过程中PbO〓电极微观结构及热分解机理的变化，建立了铅膏粒子的氧化模型，得出化成不同阶段PbO〓热分解机理的一致性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。