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Isotope separation ; stable isotope ; multi-component mixture separation ; cascade theory ; matched abundance ratio cascade

同位素分离；稳定同位素；多组分分离；级联理论；相对丰度匹配级联

By virtue of behavior experience in human society and the characteristics of pervasive computing,in addition,according to dynamic transformation discipline between the lag of trust and the anteriority of service,a trust-based model cascade servers is put forward while trust relatiuon establishment,trust degree estimation and update are depicted.The best server satisfied with the user's request is selected out by means of cascade servers to improve the service of quality and efficiency such as multiple evaluation to trust degree dynamically by direct and indirect methods（the third party's recommendation）,which conquers the disadvantage that a singular equipment can't satisfy the request property and blindfold choice of service.

借鉴人类社会行为关系的规律和普适计算环境的特点，依据信任的滞后性和服务的前瞻性矛盾的动态演化规律，提出普适计算环境中信任关系的建立、信任度的衡量和更新以及基于信任的级联服务模型；通过直接和间接的方法动态地对信任程度进行多角度评估，以级联服务的方式从众多可选择的服务目标中筛选出最符合用户要求的服务，克服了单一设备不能完全满足服务请求属性和服务选择盲目性的缺点，提高服务的质量和效率。

E. the discrete scheme of FBEM and the inner damping method of continuity equation, the author made numerical analysis of viscous flow field in cascade and cascade experiment in the experimental wind tunnel of Section 204 of Harbin Institute of Technology. The calculated results are in agreement with the experimental ones.

为进一步验证本文提出的有限边界元素法离散格式和连续方程的内部阻尼法的可行性，作者对叶栅内的粘性流场进行了数值分析，并与在哈尔滨工业大学204教研室的实验风洞上进行的叶栅实验结果进行了比较。

Analyzed the changing of energy loss in turbine cascade with different backward wedge angles,and achieved the range of the backward wedge angles corresponding of the minimum energy losses on three typical sections in the turbine cascade.

分析了叶栅能量损失系数随不同后楔角的变化，得到了在该涡轮叶栅内对应最小能量损失的3个典型截面上的后楔角的范围。

Pombe Protein kinase cascade regulates the response of extracellular stimulation in cytoplast and cell nuclei. The MAPK signal cascade is an ancestral and conservative protein kinase in eukaryote.

MAPK(mitogen-activated protein kinase，丝裂原激活的蛋白激酶)级联是在单细胞和多细胞真核生物中发现的古老而保守的蛋白激酶级联。

Cascade multilevel converter is made up of modules. It can be normally divided into two kinds: one with same modules and the other with different modules. This paper analyzes the relationship among the maximum number of output voltage level, the number of cascaded modules, and the input voltage ratio and THD of output voltage in different kinds of cascade multilevel converter. Then, some guidelines for making up cascade multilevel converter are given.

级联型多电平变换器类似于积木化的结构，本文按模块单元的结构形式，将级联型多电平变换器分为相同单元和不同单元两类，以输出最大电平数为目标，系统地分析模块单元个数与最大输出电平数、输入直流电压与最大输出电平数、以及输出电平数与谐波畸变率之间的关系，从中归纳得到构造级联型多电平变换器的指导原则。

The system uses Open CASCADE as the geometric kernel for constructing a solid model.

上述方法的实行以Open CASCADE作为模型建构的几何核心。

Volcanoes; plate tectonics; recent eruptions; USA; Hawaii; Cascade mountains; Alaska; calderas; active volcanoes

关键词：火山；板块构造学；新近的爆发；美国；夏威夷； Cascade山；阿拉斯加；喷火山口；活火山

Our results indicate that the RNA species may be regulated by PKC downstream signals related to the MAP kinase cascade. We observed E1 contains RNA increase in the polysome after induction of U937 differentiation.

我们分别对两者进行研究，发现含有Exon N1的Chk1 transcript可能以直接或间接的方式受p53的抑制；而含有Exon 1的Chk1 transcript的调控机制较不清楚，仅知可能是由PKC下游的讯息传递所调控，且可能和MAP kinase cascade有所关联。

In the 1990's, for example, the woodcutters in the Western United States were challenged legally in their attempt to cut trees for timber in the Cascade Mountains.

例如， 在90年代，在美国西部砍树的林业工人在Cascade山区尝试砍树做圆木时，被告上过法庭。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。