查询词典 model set

This paper aims at the prominent issue that current models of spatial topological relations can not represent complex object, among which 9-Intersections Model (9IM) is well known. Therefore, taking cadastral data as example, one model of topological relations between complex and spatio-temporal objects based on 9IM is put forward. And the improved sweep-line algorithm is designed. Specific studies as follows:(1)According to the concepts of point set topology, the author distinguishes the complexity of the object, redefines the spatial point, line and region. For instance, in the simple region, concave one is more complex than convex, composite regions can be composed of many parts or with holes, and so on.

本文针对当前空间拓扑关系模型无法表达复杂对象的突出问题，以地籍对象为实例，以9I模型为基础，探索了一种适合复杂对象和时空对象的拓扑关系表达模型，较好地解决了地籍对象中各类要素间拓扑关系的描述和应用，实现了地籍变更中变化语义类型的推理和历史回溯；通过对现有的拓扑关系计算方法进行了改进，设计了相关算法，给出了C语言程序示例；最后通过实验系统的实现，验证了模型和算法的可行性。

The purpose of this study is to develop an economic model that includes Government Rice Purchasing, Set-Aside, and TRQ policies. Alternative rice policies are simulated through this model.

本研究之主要目的在於建立一包含保价收购制度、水旱田休耕政策以及关税配额的进口贸易方式等三种稻米政策之经济模型，透过此经济模型的建立可模拟各种稻米政策调整之经济影响。

In order to absorb vibration of long test and measurement tubular column due to action of shock load,a dynamic model of absorber was set up base on traveling wave method and compared with common model.

针对在冲击载荷下长测试管柱的减震问题，利用行波法建立了减震系统动力学模型，与以往研究模型进行了比较，分析了减震器在冲击载荷下的动力学特性。

I shall take the simpleminded view that a theory is just a model of the universe, or a restricted part of it, and a set of rules that relate quantities in the model to observations that we make.

我用一个简单明了的观点来说就是，理论是宇宙的模型，或是宇宙的局限的一部分，也是一套将模型中的量与我们观察到的联系在一起的条例。

Methods:Establish the model of myocardial fibrosis in chronic stage of viral myocarditis by injecting CVB3 into Balb/c rats,divide these rats into model group、Tong xin luo low dose group、Tong xin luo medium dose group、Tong xin luo high dose group and set up normal group,after four weeks of giving medicine execute the animals and observe the ultrastructure of myocardial cell with tramission electron microscope,the quantity of myocardial collagen was observed by staining with H.E and Sirus red in supersaturated picric acid solution;the amount of HA in serum was measured with the method of radiative immunity;the quantitative expression of fibrosis factor—TGF、PDGF was measured with the method of immunity histochemistry.

腹腔注射柯萨奇B3病毒建立病毒性心肌炎慢性期心肌纤维化小鼠模型，随机分为模型对照组、通心络低剂量组、中剂量组、高剂量组，并设正常对照组，用药四周后处死动物通过透射电镜观察心肌细胞超微结构；HE染色、苦味酸天狼星红染色观察心肌胶原数量；放免法测定血清透明质酸的含量；免疫组化染色观察致纤维化细胞因子—转化生长因子和血小板衍生生长因子的定量表达。

The feasibility of constructing a partial least squares model with a parsimonious calibration set for NIR spectral analysis was discussed. Waveband selection was also investigated for improving the predictive ability of the model.

通过标准样品和复杂基质样品共同构建的偏最小二乘模型，考察了波段筛选和建模参数对预测结果的影响。

Continuous beam models with spring supports were set up to model end-plate connections. By comparing the results from tests with those from model analysis, the following conclusions can be drawn: during loading process, the neutral axis moves from the centroid axis to compression zone, not exceeding the center line of bolts inside the compression flange; ultimately, the tension flange and end-plate can be simplified as T-stub on the assumption that the axial forces of bolts in tension zone are equal to each other.

理论计算系建立带弹性支座的连续梁模型模拟端板连接，将模型计算结果与试验结果比较分析，结果表明：加载过程中，螺栓群中和轴逐渐从其形心轴向受压区移动，但不超过受压翼缘内侧螺栓中心线；极限状态下，受拉翼缘和端板可简化为等效T型件。

According to structural characteristics of floating slab tracks, a track segment element was taken between two adjacent fasteners. For each element, rails were regarded as Euler beams supported by discrete viscoelastic supports. The fasteners and rubber supports were replaced by a linear spring and damp. So the vibration model of the floating slab track was established. In constructing vibration model of a metro train, each car of the metro train with two suspensions was modeled as a multi-rigid body system, in which rigid bodies were connected with each other by a linear spring and damp. Combining the potential energy of vertical vibration of the track with that of the metro train, the total potential energy of vertical vibration of the train and track was obtained. And then, the matrix equation of vertical vibration of the system was established using the principle of total potential energy with stationary value in elastic system dynamics and the "set-in-right-position" rule for formulating system matrices. The vibration responses of the system can be obtained by solving the matrix equation with the direct time integration such as Wilson-θ method.

摘 要：针对浮置板式轨道结构特点，取相邻2个扣件之间的轨道为1个轨段单元，钢轨视为连续弹性点支承Euler梁，浮置板视为弹性薄板，扣件系统及橡胶支座均模拟为线性弹簧及粘滞阻尼器，建立浮置板式轨道振动模型；将城轨列车中的车辆均离散为多刚体系统，各刚体之间通过线性弹簧及粘滞阻尼器相连，建立列车振动模型；将浮置板式轨道及列车振动势能叠加，得到系统竖向振动总势能；基于弹性系统动力学总势能不变值原理及形成系统矩阵的"对号入座"法则，建立此系统竖向振动矩阵方程；采用Wilson-θ逐步积分法求解此矩阵方程，得出此系统竖向振动响应。

According to geometry model characteristic of shaft and cylinder of steam turbine, a finite element method model of shaft and cylinder was set up.

根据汽轮机转子及汽缸的几何模型的特点建立了转子及汽缸的有限元模型。

In this paper, we set a model based on stochastic lead time. In the model, we consider two cases:①the demand is a constant;②the demand is a stochastic variable.

本文主要建立了基於随机提前期的库存控制模型，其中分别考虑了需求是常量和需求是随机变数两种情况下的库存模型。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。