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The effects of ultrasonication and HF washing on SiC nano-particles were analyzed by Zeta potential, particle size distribution and SEM. The stability of suspension of SiC in ethanol, ethanediol and mixture of the two medias with PEG as dispersant at different pH were compared. The optimum ultrasonication time for SiC nano-particles was obtained. The influence of HF washing on SiC nano-particles was discussed; and high stability of SiC nano-particles suspension was achieved at pH=10 in ethanediol with 1wt% PEG as dispersant.

本文中采用Zeta电位、粒度分析、SEM等测试技术分析了超声震荡和HF酸洗对SiC纳米粉体的影响：对比研究了乙醇、乙二醇以及75%乙醇和25%乙二醇混合液作为分散介质，聚乙二醇为分散剂时纳米SiC粉体在不同pH下的分散稳定性，确定了粉体最佳超声震荡的最佳时间；探讨了酸洗的作用；并在乙二醇中，以1% PEG为分散剂，pH=10条件下获得了纳米碳化硅粉体的高稳定分散悬浮液。

In order to evalue the stability of the wall combined earth and mixing pile,the stability of foundation pit was calculated by the limit equilibrium method and the finite element strength reduction method .

为评价深层搅拌桩复合土钉墙的稳定性情况，采用极限平衡法和有限元强度折减法两种方法，对该基坑工程进行了稳定性计算计算结果表明，该支护方案满足稳定性要求，且两种方法所得的安全系数比较接

A part of sliding mass of fording landslide submerges the water level with the operation of reservoir; and the stability factor of landslide has close connection with water pressure of slices below the water level when the transmission coefficient method is used to calculate the stability of landslide.

在水库运营过程中，水库涉水滑坡会有部分滑体没在水下，在采用传力系数法进行滑坡稳定性计算时，滑坡稳定性系数与水下条块的水压力紧密相关。

The aerostatic stability analysis of the gantries and main arch ribs under wind load is accomplished by ANSYS program. Firstly, the CFD module of ANSYS is used to compute the aerostatic force coefficients of arch ribs sections. And then, the static and stability analysis of gantries and main arch ribs under several construction statuses is completed.

门式膺架和主拱肋的静风稳定性分析利用ANSYS程序进行，首先通过ANSYS的CFD模块计算主拱肋断面的静力三分力系数，然后对门式膺架和主拱肋进行各种施工状态下的静力和稳定性分析。

Through the analysis of turning stability inHengduan mountainous expressway,this dissertation studies on the testing method ofHengduan mountainous expressway with turning stability using 9-DOF vehicle dynamicmodel and Gim theoretic model of pneumatic tyres.

通过横断山区高速公路车辆弯道行车稳定状态分析，以9自由度车辆动力学模型和Gim轮胎理论模型为计算核心，对横断山区高速公路弯道行车稳定性检测评价方法进行了研究。

Research the effect of different watering period and the number on the yield and quality of glutenous wheat, the results showed: Watering times and period is directly related to the wheat yield and quality ,with the decrease of watering times, yield showed a downward trend, watering 5 times in Whole growth period, wheat yield is highest (7593.0kg/hm2), and it is lowest(7353.0 kg/hm2) with no watering in Wheat jointing period .watering 5 times in Whole growth period, Grain protein content (13.4%) and wet gluten content (33.6%) is minimum, Flour stability time is shortest (8.7 min),watering 2 times in whole growth period, protein content (16.3%) and wet gluten content (35.5%), stability time (9.6min) and so on, these comprehensive quality indicators are better.

经过不同浇水时期及浇水次数对强筋小麦产量和品质的影响研究，研究结果表明：浇水时期和浇水次数对小麦产量和品质有直接关系，随浇水次数的减少产量呈下降的趋势，全生育期浇5水产量最高7593.0kg/hm2，拔节期不浇水产量最低7353.0kg/hm2。

The results manifest that the concentration of glycocholic acid has satisfactory linear correlation whith peak area, regression equation: Y= 39579X + 57823,R2=0.9984;The lowest detected concentration is 0.02μg/mL with S/N=3 ; Average recovery rate is 98.49%; RSD为0.52%～2.00%in day, RSD为0.74%～4.98%between days;The average recovery rate is 99.35%, RSD is 2.24% in the first team, and it is 100.87%, RSD is 4.73% in the second team at the stability test. When the concentration of glycocholic acid was detected in the liver, kidney and brain tissue, corresponding tissue concentration was calculated by preparing the standard curve with the glycocholic acid standard preparation in vitro, but the result can only reflect the relative chang law of the concentration of glycocholic acid in tissue but not in real tissue. The result of tissue stability experiment is consistent with that of the serum experiment.

结果表明，在0.15625～10.0μg/ml范围内血清中甘氨胆酸浓度与峰面积呈良好的线性关系，回归方程Y= 39579X + 57823，R2=0.9984；以信噪比S/N=3为标准，最低检测浓度为0.02μg/ml；平均回收率为98.49%；日内RSD为0.52%～2.00%，日间RSD为0.74%～4.98%；稳定性试验第一组的平均含量为99.35%，RSD为2.24%，第二组的平均含量为100.87%，RSD为4.73%；测定了肝、肾、脑组织中甘氨胆酸含量，采用体外甘氨胆酸标准品制备标准曲线的方法计算了相应的组织浓度，其结果仅反映组织中甘氨胆酸浓度的相对变化规律，不能体现真正的组织浓度值，但对组织样品的稳定性进行了较细致的考察，其结果和血样结果基本一致。

After the NK gene from recombinant plasmid pUC19-NK was cloned on expression vector pBV220, it was transformed into host cell E. coli HB101. Recombinant plasmid pBV220-NK was extracted for identifying by analysis of restriction enzymes, PCR and sequencing. Studies on recombinant strain's growth and expression showed that heterogene have no distinct effect on host cell. The recombinant plasmid have excellent segregational stability but low structural stability. The results of kinetics of pBV220-NK expression in E.

将重组质粒pUC19-NK上的纳豆激酶基因成功克隆到表达载体pBV220上，并将之转入大肠杆菌HB101中，得到转纳豆激酶基因工程菌，提取重组质粒经单酶切、双酶切及PCR分析验证后，对重组菌的生长及表达进行一系列研究，结果表明：外源纳豆激酶基因的导入对宿主的生长没有明显的影响：重组质粒的稳定性实验表明：该质粒具有良好的分离稳定性，而结构稳定性较差。

This essay focuses on the extraction of Berberis heteropoda pigment with different impregnants, the influences that different pH condition and different mentalion take on the Berberis heteropoda pigment＇s stability, as well as that oxidizer and reducing agent take on its stability.

研究了不同溶剂对小檗色素的提取效果，以及不同pH、不同金属离子、氧化剂和还原剂对该色素稳定性的影响。

Experts'research on the stability of water-based ink and process has been a preliminary study. Femandez and other matozoa of the discovery of water-based ink by electrostatic repulsion stability and space steric 's. Aromtics and gecol, and so on the surface of the plastic film studies indicate that water-based inks, join different types of surfactants can be effective removal of water-based inks, and Canadians zephiramine hexadecyl alkyltrimethylammonium can make the surface charge of carbon black particles.

国际学者差火性油墨的稳不退性和脱除工艺已举行了开端查究。femandez等发掘火性油墨的胶体稳不退性是由静电排不引力和不满答位阻效应成群不决的。gecol等差脱除塑料薄膜暗不天的火性油墨查究后暗示，参加差别种类暗不天活性剂均可灵验去除火性油墨，而且加人阳离子暗不天活性剂十六烷基不一甲基溴化铵可以使炭暗粒子暗不天电荷逆转。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。