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Under the framework of constituent quark model, according to the effective degrees of freedom used, we have the Glashow-Isgur model , the spontaneous chiral symmetry breaking model, the hybrid model and so on.All of these models are successful to describe the properties of the mesons and baryons.

组分夸克模型是一种非相对论模型,根据所采用的有效自由度的不同,组分夸克模型又可以分为好几种具体的模型,主要有:Glashow-Isgur模型、手征对称自发破缺模型和&杂化&模型等。

So as to understand deeply the supply contract in theory; Fouth, based on the research above, the author, discusses the application of supply contract management, with providing some contract models and exampling the supply contract management in some intricate contracts models, for instance, Quanlify, Fix-quantified, Time flexible, and Forward contracts etc..

如,应用委托代理模型,多任务代理模型,团队理论模型等,研究供应链合同管理中企业的合同管理,并应用二层代理模型深入探讨合同决策的理论分析方法。另外,作者还应用报童模型,结合具体供应链合同管理的合同模型,分析合同决策,与供应链结构和效率之间的联系,探讨报童模型在供应链合同管理研究中的重要价值。

Therefore, the study is significant both theoretically and practically. As a result, the studying aim of this paper is to establish a practical and complete system for the prediction of ship maneuvering motion, taking into account of the influence of the environmental factors, such as the wind, wave and current, establish a practical and complete system for the prediction of ship maneuvering motion. In this paper, the OpenGL virtual reality simulation technique is introduced into the field of ship maneuver and control, and using the MMG mathematical model, the three dimensional dynamic simulation system of the ship motion is established and good results are achieved. In the process of the system development, firstly, the maneuvering motion equations for ship in the still water are established, based on the MMG module mathematical model and serial experimental result. After compiling the program, the calculation results are compared with the experimental data, the coherence between them validate the mathematical model.

在系统开发过程中,首先采用MMG分离式数学模型及相关的系列化试验结果,建立单桨单舵海洋运输船舶在静水中的船舶操纵运动方程,并编制计算程序,经与试验结果比较,证实了计算结果的正确性;为了解MMG数学模型模型参数变化对操纵性指数的影响程度,作者在上述已有程序基础上,对有关模型参数进行偏移修正,探讨了相应参数变化后的操纵性指数,对船舶操纵性指数对模型参数的灵敏度进行了详细的分析与探讨,所得结论与工程实际相吻合,具有实际应用价值,并为进一步提高船舶操纵性预报的精度打下了基础;然后,在已有的船舶静水操纵运动模型基础上,考虑双桨双舵的影响,建立了内河双桨双舵船舶的操纵运动模型;最后,综合考虑风浪流作用力的影响,进行了船舶的操纵运动仿真计算。

We firstly summarized some nuclear structure models, and then introduce relativistic mean field theory and its application to spherical nuclei. At Last the characteristics of pseudospin symmetry are researched in details. It briefly includes several following aspects:(1) Some nuclear models such as liquid drop model, Fermi gas model, shell model, project shell model and Bohr model are summarized.

本文首先概述了一些主要的原子核结构模型,然后介绍了相对论平均场理论的建立及其对球形核的描述,最后对赝自旋对称性进行了研究,主要包括以下几个方面:一、概述了已经取得很成功的液滴模型、费米气体模型、壳模型、投影壳模型以及玻尔模型等描述原子核结构的理论模型

Based on those analyses and conformed international and national economic condition in china and some intrinsic defects of target zone regime, author transform target zone exchange rate regime by dividing two layers and bring forward a new exchange rate regime: double-layer-monitor exchange rate regime, the new model have possessed two merits, one is that the new model make "hollymoon effect" of target zone recurrence,and the merit can alleviate the fluctuation of exchange market;another merit is that the new model is a self-regulation system, that is say, the model can avoid long-term misalignment of exchange rate, those merit have major significance for china economy sustainable development and Chinese financial system more perfection, in paper we also present some fiscal policy and money policy served as a foil to double-layer-monitor exchange rate regime in order to make it work well, at last, we conclude that the new model will be the prior selection of RMB exchange rate regime reform for a long time form now on, and it also can serve as the bridge of RMB exchange rate regime steering to one of bipolar—free float.

在这些分析的基础上,并考虑到当前中国所面临的国际国内经济环境,针对汇率目标区的一些固有缺陷,笔者又对汇率目标区模型进行了分层改造,提出了一个新的汇率机制模型:汇率目标区双层监控模型,该模型有两个主要优势,一是可以使&蜜月效应&得以重现,从而避免外汇市场的过度波动;二是该模型是一个自稳定系统,能够进行自我调整,使实际汇率同长期均衡汇率保持一致,从而避免实际汇率的长期错位。这些优点对于我国经济的可持续发展,对于我国金融的更加完善,有着十分重要的意义。为使汇率目标区双层监控模型良好运行,论文还就相应配套的财政政策、货币政策措施作了探讨。最后得出结论,按照汇率制度&并存继起&假说,今后很长一段时间内,汇率目标区双层监控模型都将是人民币汇率制度的合意选择,另外,它也可作为人民币汇率制度向独立浮动制过渡的桥梁。

This article studies the evaluation methods of spaceflight product′s reliability, and take cosmonaut system as an example, via comparison of a few systemic reliability models and of several evaluation methods, present classical evaluation method and Bayes method for series-wound model, shunt-wound model, voting model, non-work standby model and conjunct model.

本文研究了航天产品可靠性的评估方法,以航天员系统为例,通过对几种常用的系统可靠性模型与评估方法的分析比较,给出了串联模型、并联模型、表决模型、旁联模型与和联模型5种系统可靠性模型的经典评估方法与Bayes评估方法。

The whole stand model system was set up for Larch plantation, which was composed of 5 models mentioned as follow and models were compatible each other: 1 stand ultimate self-thinning line and definition of SDI; 1 prediction model for trend of stand density index; 3 predicting model of height-diameter curve; 4 stand basal area growth model; 5 Schumacher's stand yield model.

以落叶松人工林林分断面积生长模型为核心的全林分模型系统,由满足相容性原则的5个模型所组成:1林分最大密度线及SDI的定义;2林分密度动态预估模型;3树高曲线动态预估模型;4林分断面积生长模型;1Schumacher式林分收获模型

The whole stand model system was set up for Larch plantation, which was composed of 5 models mentioned as follow and models were compatible each other: 1 stand ultimate self-thinning line and definition of SDI; 1 prediction model for trend of stand density index; 3 predicting model of height-diameter curve; 4 stand basal area growth model; 5 Schumachers stand yield model.

以落叶松人工林林分断面积生长模型为核心的全林分模型系统,由满足相容性原则的5个模型所组成:1林分最大密度线及SDI的定义;2林分密度动态预估模型;3树高曲线动态预估模型;4林分断面积生长模型;1Schumacher式林分收获模型

Based on the measure of sand geometry in M Block and comparison of results calculated with Spherical, Exponential and Gaussian Model, it is concluded that different variogram models get very different variogram range in major and minor direction.

在详细解剖M油田的砂体几何形态的基础上,对比分析球模型、指数模型和高斯模型的计算结果,3种模型计算的变差函数长变程误差15%,短变程误差25%,方向也不一样;同时运用不同模型计算的砂体体积亦有较明显的差别:砂体越发育,砂体连通性越强,不同模型计算的砂体体积相差越小;砂体越不发育,砂体连通性越差,不同模型计算的砂体体积相差越大。

There are few equivalent circuit modeling methods for UWB antennas. This thesis compares the characteristic of some existing modeling methods and presents a general and precise modeling method for UWB antennas. Firstly, establish the narrowband model of the antenna, and compute the difference between input admittances of the antenna and its narrowband model. Secondly, implement rational approximation of the difference to build the macromodel, and convert it into SPICE equivalent circuits. Lastly, combine the narrowband model and the macromodel to form the ultimate equivalent circuit model of the antenna.

本论文针对目前UWB天线等效电路建模方法比较少的现状,结合现有的天线建模方法的一些特点,研究了一种系统通用、模型精度高的新建模方法:首先建立超宽带天线的窄带模型,计算天线及其窄带模型导纳的差值;接着对差值进行有理多项式拟合,得到相应的宏模型,并转化为SPICE等效电路;最后合并窄带模型与宏模型电路,得到天线等效电路模型

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。