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mathematics models
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  数学模型
     The linear regress and quadratic regress mathematics models of static drift data were established,which linear drift rate and quadratic drift rate respectally were-5.5×10~(-5) and 5.02322×10~(-8).
     建立静态漂移的线性回归、二次回归数学模型,其线性漂移率为-5.5×10-5,二次漂移率为5.02322×10-8;
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     The BP neural network is better than the traditional mathematics models in nonlinear system (prediction.)
     传统数学模型对非线性系统进行预测往往造成较大误差,而BP神经网络能取得较好的效果.
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     Then study the benefit-risk coordination mechanism by the cybernetics and contract theory, Therefore we discuss the mechanism of the contract, Zonta collaborate, conflict management and interior correspond, and build a series of mathematics models.
     运用控制论和契约理论的原理和方法,对供应链管理的利益风险协调机制进行了研究,具体讨论了供应链管理的契约机制,诚信合作机制,冲突管理机制,内部协调机制,并建立了一系列相关的数学模型
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     Orthogonal regression of ternary quadratic were tested by the factors of applying N,P2O5 and organic manure in Huangjiazhai town Datong county during 2002—2003.The mathematics models were established. The analyzed results showed,broad bean yield effect function of factors were N>M>P2O5 in the place process of broad bean culture.
     2002—2003年在大通县黄家寨镇以氮肥(N)、磷肥(P2O5)、有机肥(M)的施用量为因素,进行三元二次回归正交试验,建立数学模型,解析表明:该区蚕豆栽培中,三因素对产量的作用依次为N>M>P2O5。
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     Theory analysis is studied about energy absorb in the case of static and dynamic axial crushing for metal circular tube filled with aluminum foam. Mathematics models are got about energy absorb and its structure parameters relation.
     本文首先在考虑空心圆管与泡沫铝相互作用的情况下对泡沫铝填充圆管在静、动态轴向压缩的情况下的能量吸收进行理论了研究,得出泡沫铝填充圆管在静、动态轴向压缩的情况下的能量吸收与其结构参数之间关系的数学模型;
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  数学建模
     Establishment and Application of Mathematics Models Due to Free Water Dissociating Vessels in the Combining Station
     联合站游离水脱水器数学建模与应用
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     Reflections on Students' Contest in Mathematics Models
     指导学生数学建模竞赛对教学改革的启示
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     3.By three difference methods about data dealt with, mathematics models for the growth and yieldof the Robinia pseudoacacia artificial stand were set up.
     3.运用三种不同处理数据的方法,对刺槐人工林分生长量生长和收获进行数学建模,通过SPSS10.0统计分析软件的非线性回归对标准地数据进行回归分析,可以得出:
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     In this paper, meaning of mathematics models in quality education is considered and some suggestions to develop mathematics models in science and technology are put torward.
     通过数学建模教学和指导数学建模竞赛的实践 ,详细论述了数学建模在全面素质教育中的作用 ,以及就如何在理、工科专业中开展并普及数学建模活动提出了建议
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     The paper regards the existing transmission systems as a cooperative investment that is formed by all the users based on the investment benefits of scale in the transmission grid, regards the fixed cost allocation problems of transmission systems as the costs allocation problems of cooperative game theory, and mathematics models are setted up using the nucleolus method at the same time, moreover simulations are made with a IEEE 14-bus system.
     本文中利用合作博弈的特性,将已有的输电系统看成是电网中所有用户基于投资的规模经济效益而形成的合作性投资,将输电固定成本的分配问题看成是合作博弈中的成本分配问题,再运用合作博弈核仁解的概念对其进行数学建模,最后对IEEE14节点系统进行了仿真验算。
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  “mathematics models”译为未确定词的双语例句
     The mathematics models used in the prediction of electromagnetic interference between radar systems are obtained, in which the interference prediction equations are given.
     针对雷达与雷达之间的电磁干扰问题,建立了发射源模型、传输通道模型、接受器模型和天线之间的耦合模型,给出了雷达系统的干扰预测方程。
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     Study on the Spatial Distribution and Mathematics Models of Codling Moth
     苹果蠹蛾空间分布型及数学消长模型研究
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     In the test, choose the angle contact bearing as test bearing, and work in the different position of spindle system, then test the temperature and vibration of the bearings in different speed and different loading, and analysis the data to verified the mathematics models.
     首先根据理论计算,选用适用于高速运转的一组角接触球轴承,各轴承处在轴系中不同位置,然后通过试验分别对各轴承的工作温度和轴系振动量进行测量,最后对数据进行分析,通过试验验证前面所建立的数学分析模型的正确性。
短句来源
     First, establishment of mathematics models is based on the principle and method of systems engineering.
     首先,把一个县视怍一个系统,并按照系统的观点建立它的总体结构模型和部门结构模型;
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     Several new theories, new methods and new models were proposed: methods of quality information acquirement, transmission and disposal; methods of Intelligent Statistical Quality Control; mathematics models of quality prediction;
     与“全质量”将工程与管理相结合,将信息集成和质量控制相结合的主旨相一致,重点研究了质量信息的智能获取、传输、处理及集成等技术与方法,讨论了过程质量控制的智能化方法,并建立相关的智能质量控制模型。
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  mathematics models
Using the new mathematics models, we present the control mesh representations of two classes of minimal surfaces.
      
When these results are applied to some special delay bio-mathematics models, some new results are obtained, and many known results are improved.
      
It can make the drawing of these knobs quantitatively and establish corresponding mathematics models.
      
The virtual worlds are given by mathematics models and software programs.
      


The airscrew included various propellers, fans, windmills and helicopter blades, etc. In an earlier paper [2], we suggested the Mathematical model of helicopter rotor airfoil. In this paper we shall concern ourselves with the problem of describing surfaces of the propellers.Instead of subdividing a surface into parts or "patches" we shall investigate ways to treat it as a whole. This method is simple to implement and computationally efficient.After making a series of researches, the mathematics model...

The airscrew included various propellers, fans, windmills and helicopter blades, etc. In an earlier paper [2], we suggested the Mathematical model of helicopter rotor airfoil. In this paper we shall concern ourselves with the problem of describing surfaces of the propellers.Instead of subdividing a surface into parts or "patches" we shall investigate ways to treat it as a whole. This method is simple to implement and computationally efficient.After making a series of researches, the mathematics model of airplarce propellers has been established. A routine is made by using ALGOL-60 language according to the presented method.

空气螺旋包括螺旋桨、风车、风扇和直升机叶片等。在[2]里,我们提出了直升机旋翼桨叶的数学模型。本文探讨螺旋桨型面的描述问题。在这里,我们不是将一个型面分成许多块或“曲面片”,而是把它当作一个整体来处理。这种方法简单易行,计算有效。 经过初步探索,已经建立起飞机螺旋桨的数学模型,而且用Algol-60语言编写了计算程序。

The cost of the cupola burden would be the lowest under the conditions in which the computer is used to obtain the optimum burden ensuring chemical composition and characteristics of the molten iron. The article delivers the mathematics models, computer programme and something about the burden during the process and its analysis of the economical result. The process has been used in casting at HT15—33 in the Harbin Boiler Works, and the cost has been cut down by 11.41%. On July 14, 1980, approval was made...

The cost of the cupola burden would be the lowest under the conditions in which the computer is used to obtain the optimum burden ensuring chemical composition and characteristics of the molten iron. The article delivers the mathematics models, computer programme and something about the burden during the process and its analysis of the economical result. The process has been used in casting at HT15—33 in the Harbin Boiler Works, and the cost has been cut down by 11.41%. On July 14, 1980, approval was made by the Harbin Institute of Science and Technology. The process is considered to be a new, advanccd and reasonable one with certain economical value, thus it should be recommended to spread.

用电子计算机实现最优化配料,是在保证铁水化学成分与性能的情况下使金属炉料的成本最低。文中介绍了此方法的数学模型。电子计算机程序,配料在生产中使用情况和经济效果分析。哈尔滨锅炉厂在HT15—33上使用,可降低成本11.41%。哈尔滨市科学技术委员会1980年7月14日对《用电子计算机实现冲天炉最低成本配料新方法》进行了技术鉴定。认为此方法是一种新的方法,理论正确,方法先进合理;对保证铁水质量,降低成本行之有效;能起指导生产的作用。配料对冲天炉来说是保证铁水化学成分与性能的唯一手段。目前冲天炉配料计算有分析法,图解法和选举法。它们能够满足铁水成分要求,已被无数生产实践所证实。随着工业的发展,对铸铁不仅要求提高质量,而且要不断的降低成本。特别是扩大企业自主权以后,实行三级经济核算,进行利润提成。降低成本就显得更加重要。哈尔滨科技大学从79年6月开始研究配料最优化问题。从理论上提出了用电子计算机实现冲天炉最低成本配料法,被选为全国第一次铸铁及其熔炼学组宣读论文。79年10月哈科大与哈锅炉厂合作。对HT15—33进行试验。通过48炉次,熔炼151吨铁水的生产试验。性能、成分合格,可降低成本11.41%每吨下降14.71...

用电子计算机实现最优化配料,是在保证铁水化学成分与性能的情况下使金属炉料的成本最低。文中介绍了此方法的数学模型。电子计算机程序,配料在生产中使用情况和经济效果分析。哈尔滨锅炉厂在HT15—33上使用,可降低成本11.41%。哈尔滨市科学技术委员会1980年7月14日对《用电子计算机实现冲天炉最低成本配料新方法》进行了技术鉴定。认为此方法是一种新的方法,理论正确,方法先进合理;对保证铁水质量,降低成本行之有效;能起指导生产的作用。配料对冲天炉来说是保证铁水化学成分与性能的唯一手段。目前冲天炉配料计算有分析法,图解法和选举法。它们能够满足铁水成分要求,已被无数生产实践所证实。随着工业的发展,对铸铁不仅要求提高质量,而且要不断的降低成本。特别是扩大企业自主权以后,实行三级经济核算,进行利润提成。降低成本就显得更加重要。哈尔滨科技大学从79年6月开始研究配料最优化问题。从理论上提出了用电子计算机实现冲天炉最低成本配料法,被选为全国第一次铸铁及其熔炼学组宣读论文。79年10月哈科大与哈锅炉厂合作。对HT15—33进行试验。通过48炉次,熔炼151吨铁水的生产试验。性能、成分合格,可降低成本11.41%每吨下降14.71元。据有关资料介绍我国每年铸铁件产量为300—400万吨左右,如果都采用此方法配料。每年可节约4000—5000多万元。

A nuclear power system is very vast and complex. Whole national nuclear power may consist of several types of reactors. These types of reactors make up a symbiotic fuel cycle system. The technology of thermal converters hasmatured and its power generation cost is cheaper. But its uranium utilization is lower. Although the gain of nuclear fuel for FBR is very fast, more inventory of fissible fuel and higher capital cost are needed, and the inventory during initial stage of FBR development must be supplied by...

A nuclear power system is very vast and complex. Whole national nuclear power may consist of several types of reactors. These types of reactors make up a symbiotic fuel cycle system. The technology of thermal converters hasmatured and its power generation cost is cheaper. But its uranium utilization is lower. Although the gain of nuclear fuel for FBR is very fast, more inventory of fissible fuel and higher capital cost are needed, and the inventory during initial stage of FBR development must be supplied by the thermal converters. So there exists an optimal mix of thermal converters and FBR, which can achieve better economic effect in this system. Besides, the economic scale of nuclear industry enterprises is all very large now. It is necessary to consider the appropriate introduction schedule of these enterprises.This paper describes the dynamic linear programming model developed for a nuclear power system. Based on the physical essence of each process in this system and nuclear fuel flows, the various equilibrium equations and restraint relationships of variables are set up. These mathematics models describ the wbnle physical process of nuclear fuel cycle. Both linear programming and mixed integer programming are used to solve these problems. The primary results have welt represented the dynamic characteristic of whole system and given out the activity level of each process. the flow rate of nuclear fuel between processes and the number of ecomomie scale enterprises in each time period under optimization condition. The dynamic linear programming model is an efficient approach for project of the nuclear power system.

核动力系統是一个非常庞大和复杂的系統,一个国家的核动力系統可能由几种堆型所組成,这些堆型結合在一起就构成了一个組合的燃料循环体系。热中子轉化堆技术成熟,发电成本經济,但对核燃料的利用率低。快中子增殖堆核燃料的增产速度很高,但初装的可裂变材料多,基建投資大,其初始发展阶段所需燃料向須由热中子轉化堆提供。因此,在这种組合体系內必然存在着能达到較好經济效果的热中子堆和快中子堆最优配置方式。此外,核工业企业的經济規模都很大,需考虑它們最优引入的时間日程表。本文对核动力系統建立了动态綫性規划模型。針对核动力系統各个工艺环节的物理实質及核燃料的流程,建立了各种平衡方程式及各变量間的約束关系式,从而用数学模型描述整个核燃料循环的物理过程,并用綫性規划和混合整数規划方法求解。初步計算結果較好地反映了系統的动态特性,給出了在最优化条件下每个时間周期各个工艺环节的活动水平、环节間的物料流量以及各个工艺环节經济規模企业的个数等数据。这种动态綫性規划模型对研究核动力系統发展規划問題是一种有效的手段。

 
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