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Using coupling model M4RC3 and improved MM4, a dust storm and a snow storm were simulated respectively. The effects of radiation parameterization and microphysics parameterization on development of dust storm and snow storm mesoscale system were discussed. Dynamical and thermodynamical diagnoses were also carried out to study the developing mechanism on the systems.

用耦合模式M4RC3和引入三相云显式降水方案后改进和发展的中尺度模式MM4分别对西北地区黑风暴和暴雪进行了数值模拟,讨论了模式中辐射参数化和微物理过程参数化对与黑风暴和暴雪相伴的中尺度系统演变的影响,并对这些系统发生、发展的机制进行了动力学和热力学诊断。

It was supposed that the dynamic moving process of the stock price and the return was driven by Geometry Brownian Motion and the lognormal distribution respectively. Takinginto account the riskneutral environment, we got a closedform analytical formula for deferred arithmetic asian options by the method of Taylor expansion of the stochastic integral formula within the terminal payoff. Furthermore, with the series definition of the definite integral, we transferred the continuous problem into a discrete one which is simpleenough to figure out. Meanwhile we tested the accuracy of the formula with the Monte Carlo simulation as a benchmark and the result shows that the formula can be utilized to price the related financial derivatives.

在标的价格服从几何布朗运动、收益服从对数正态分布的前提下,通过风险中性定价原理,对到期损益中的随机积分进行任意次Taylor近似,并由级数定义将此连续问题离散化,给出了延期算术平均亚式期权封闭形式的解析定价公式,并与Monte Carlo模拟得到的价格作为标尺对得到的公式进行精确性检验,结果表明,所得公式可以应用到金融实务中对此类衍生品定价中。

Based on field observation and indoor analysis about the stylolites in Tieshan,Daye,Hubei Province,this paper raises some fresh understandings about the stylolite as follows:(1) Stylolite s are classified into wave-shaped,sawtooth-shaped,city-wall-shaped and thin-column shaped stylolites.

为深入研究碳酸盐岩中的压溶作用,加深对压溶作用的认识和理解,以常见的缝合线构造为例,结合前人的研究成果和现代科技手段对湖北大冶铁山地区的缝合线构造进行了全面深入的研究,得到以下研究成果:丰富了缝合线类型;结合计算机技术获得了缝合线的三维形态;总结了缝合线形成中的一些主控因素;论述缝合线在应力分析、应变测量等传统领域及在能源资源等新领域的应用;对缝合线研究中存在的问题及分歧进行了评述并指出今后几年的研究重点。

At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.

首先使用了反应谱分析法设计出欲附设的粘滞阻尼器的线性阻尼系数,由于实际工程所用的粘滞阻尼器具有非线性的特性,故而笔者又证明了降低速度指数对提高粘滞阻尼器的耗能量的优势所在;接着分别从位移、层间位移、速度、层间速度、加速度、能量、最大阻尼出力和柱轴力等不同的角度对结构在附设粘滞阻尼器前后的时程反应进行了分析对比,籍此在实际工程中证明了附设粘滞阻尼器对于提高结构的抗震性能的优越性;再者,笔者还阐述了采用不同的粘滞阻尼器布置方式对结构中构件内力特别是柱轴力和基座竖向反力产生的不利影响,并在此基础上提出了布置方式的优选;最后,指出了反应谱法在设计中的适用范围:对于均匀结构反应谱法能够使用,而对于含有薄弱层的结构反应谱法并不适用;对于类似于上海展览馆中央大厅的含薄弱层的结构尤其值得使用粘滞阻尼器的方法进行抗震加固。

First, the expression and function of FGF-13 were examined in normal vibrissa follilce stem cells in vivo and in vitro.

然后在体外和在体两种情况下对FGF-13在正常大鼠生长期触须毛囊干细胞中的表达及作用进行初步研究;最后在体外初步建立游离培养的毛囊损伤模型,对FGF-13在损伤修复过程中的表达及作用进行了探讨;结果: 1、胚胎发育期的表皮中有FGF-13蛋白的表达,表现出逐渐升高又迅速降低的趋势。

The paper through the mechanism which produces to the asphalt road surface water harm carries on the induction to summarize, as well as the different type bituminous mixture water stability has carried on a series of contrasts experiment to several kind of different aggregates and the asphalt adherency, has analyzed the aggregate and the asphalt adherency and the bituminous mixture water stability; Meanwhile moves the water action mechanism take the pavement structure in as the key point, in the basis room experiments to the design half rigid base bituminous mixture test sample carries on washes out the experiment, the observation test sample and washes out when the number of times increase along with the time variation the basic unit wash load situation, has analyzed the water to the bituminous pavement various structures level damage rule; To immerses under the condition using the ANASYS finite element software the bituminous pavement structure level the stress to carry on the analysis computation, and analyzed the bituminous pavement according to the computed result to produce the unboiled water harm the rule, further to understand the structure level produced the unboiled water harm the rule.

本论文通过对沥青路面水损害产生的机理进行归纳总结,对几种不同集料和沥青的粘附性以及采用不同抗剥落措施的沥青混合料的水稳性进行了一系列对比试验,分析了集料与沥青的粘附性及沥青混合料的水稳定性,并对水稳性试验进行了评价;同时以路面结构中的动水作用机理为重点,依据室内试验对设计的半刚性基层沥青混合料组合试件进行冲刷试验,观察试件随时间变化和冲刷次数增加时基层的冲刷量情况,分析了水对沥青路面结构层的损坏规律;利用ANSYS有限元软件对浸水前后沥青路面层底应力进行分析计算,并根据计算结果分析了沥青路面产生水损害的规律,进一步了解结构层产生水损害的规律。

On the basis of ESTs, three antenna specific protein—Ac-ASP1, Ac-ASP2 and Ac-ASP3, were cloned and identified through the transcriptional profiles and immunocytochemical localization in antennal sensilla. All above will produce an important basis to the exquisite olfaction and action of discrimination against others and resistance to mites of A.

在此基础上,着重通过对中蜂主要的触角特异蛋白——Ac-ASP1,Ac-ASP2和Ac-ASP3进行基因克隆,并通过其在触角中的转录表达谱和在触角不同感器内的亚细胞定位,以期对上述分子进行鉴定,最终对揭示中蜂灵敏的嗅觉以及独特的排异和抗螨能力奠定重要的基础。

This project focuses on the joint time frequency characteristics of different phenomena in different types of fire disaster, such as pool fires, boilover, smoke movement, and different classes of fire. The temperature, optical density, heat radiation, combustion noise, and velocity of thermal flow are analyzed by joint time frequency method.

本项目研究中针对各种火灾场景:如油池火焰在水雾、风作用下的变化、扬沸过程中诸参数的变化、烟气运动过程、各类火焰等进行了实验与分析,对实验中的温度、火焰消光度、热辐射、燃烧噪声、速度分布等参数进行了联合时频域的分析。

Methods: 1 HA particles were put into two kinds of solutions, which contained HA or Brushite microparticles, respectively. After vibrating for different time, the number of the microparticles attached to HA particles was measured and compared. 2 The solution containing HA microparticles was painted on the surfaces of exposed dentinal tubules to investigate the sealing effect of HA microparticles on dentinal tubules using ESM.

1羟磷灰石颗粒放入羟磷灰石微粒子溶液中进行机械反应与羟磷灰石颗粒放入Brushite (CaHPO42H2O)微粒子溶液中进行机械反应,对比两种溶液中微粒子附着在羟磷灰石颗粒表面的量。2用羟磷灰石微粒子涂布牙本质表面观察裸露的牙本质小管封闭情况。

Because the data categoricalness rules of architecture products are embodied in theCADM described by IDEF1X, the data categoricalness rules are directly established according to the relationship, which is described by the IDEF1X, among the data entity of CADM described by the IDEF1X. Then every item of data which is in the form of CADM criterion and stored in the database is checked according to the categoricalness rules, so that the data categoricalness of C~4ISR system architecture is executed.3. The verification methods of system accessibility based on CADM are studied.

2研究了基于CADM的数据完备性验证方法由于体系结构产品中数据元素的完备性规则已经完全表现在用IDEF1X描述的CADM模型中,所以论文根据IDEF1X对CADM数据实体之间关系的描述,直接建立了数据元素的完备性规则,然后根据完备性规则对以CADM规范存放在数据库中的每条数据进行检查,以此对C~4ISR系统体系结构数据进行完备性验证。

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推荐网络例句

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。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?