查询词典 combinatorial optimization problem

The optimizing fracturing design chiefly includes fractures parameter optimization of fracturing wells, the volume of pre-conditioning fluid and preflush, the optimization of pump parameter and program, the optimization of fracturing technology parameters (Optimizing various kinds of proppant, concentration, volume and program and the adding way to optimize the reasonable operation parameters so as to improve the fluid diversion in natural formation fractures and main fractures).

压裂优化设计主要包括压裂井裂缝参数优化；预处理液和前置液用量、泵注参数和程序的优化；压裂工艺参数优化(以提高地层天然裂缝和主裂缝导流能力为目标，优化各种支撑剂类型、浓度、用量和程序，以及加入方式等；优化合理的施工参数)。

Firstly, the meanings of multi-objective and layered optimization is explained in detail and the steady-state optimization based on quadratic programming is presented to solve the multi-objective and layered optimization in the context of two-stage model predictive control formulation.

本文围绕预测控制的滚动优化特点，对预测控制中的若干问题进行了深入研究，在总结目前已有研究成果的基础上做出了有效的改进，提出了自己的创新点。

The meaning of multi-objective and layered optimization is explained in detail and the steady-state optimization based on quadratic programming is presented to solve the multi-objective and layered optimization in the context of two-stage model predictive control formulation.

详细阐述了复杂工业过程的多目标分层优化要求的含义，在预测控制两级分层结构的基础上提出了基于二次规划的定态优化有效求解方法。

Therefore, it is necessary to put forward fast and easy reanalysis methods of structure optimization so as to enhance the efficiency of structure optimization and speed up the optimization process, which is also one the main content of this dissertation.

因此，为了提高整个结构优化设计的效率，加快优化设计的进程，十分有必要研究快速而简便的拓扑优化重分析方法，这也是本文的主要研究内容。

The BGP-RCS framework is a feedback control system, which composes of four parts: egress selection optimization in static stage, egress selection optimization in dynamic stage, negotiation process between domains, and dynamic detection of traffic change to decide the occasion of optimization recomputation.

BGP-RCS框架是一个反馈控制系统，主要由BGP出口选择静态优化控制、BGP出口选择动态优化控制、相邻域协商和动态流量监测四部分构成。

The main research content is: Using the experimental of cutting force and roughness of high speed face milling cutter and high speed end milling cutter mill aluminium alloy and cast iron, analyze the rules of the high speed milling velocity, feed rate per tooth, milling depth and milling width to high speed processing. Use multiple linear regression method, set up surface roughness and the cutting force fluctuation models. Certify the regression model notability, and provide a reliable guarantee for the accuracy of function optimization. Based on the targets of productivity, manufacturing cost, surface roughness, cutting force fluctuation optimization model, according to research of the high speed milling parameters selecting restrict of work piece, machine, tool and safety, set up high speed milling parameters multi-object optimization system.

本文以已有的高速铣削机理及高速刀具技术研究成果为基础，结合高速铣削试验，进行了基于遗传算法的高速铣削参数优化研究与系统开发，主要的研究内容为：通过高速面铣刀和高速立铣刀加工铝合金和铸铁等材料的切削力和表面粗糙度试验，进行了铣削速度、每齿进给量、铣削深度和铣削宽度对高速铣削加工过程影响的研究；采用多元线形回归的方法，建立了切削力及其振幅和表面粗糙度模型，并对模型的显著性进行验证，为高速铣削参数优化模型的建立奠定了基础。

This paper divided bus network optimization into three parts to discuss: public transport demand forecast the short-range optimization mode of the bus network and the optimization technique of the current bus network.

本文结合具体项目的需要，在既有研究的基础上，对公交网络近期优化方法进行了研究。

Within the optimization of systematic level of cooperated optimization, the slack variable is introduced to let the restraint of consistency equality be transformed to the restraint of non-equality. The value adoption of slack variable will affect the convergence speed in the optimization of systematic level.

在协同优化的系统级优化中，引入松弛变量，将一致性等式约束转化为不等式约束，松弛变量的取值影响系统级优化的收敛速度。

The PID parameter tuning of non-linear control system is set as the engineering background. The aim is the optimal design of PID parameter. On the basis of the design and research of the advanced PID parameter tuning, the mathematical model-transfer functionis developed through correlation analysis on statistical method.And with the optimization algorithm under constraint condition, the non-linear, Isqnonlin is set as object function. Then with connection of the non-linear constrain optimization algorithm and simulink technique, a set of adjust parameters which fit the performance index of the control system are found. And optimization design process and steps are provided.

本文以非线性控制系统PID参数整定为工程背景，以PID参数的优化设计为目标，在分析和研究国内外PID参数先进整定方法的基础上，运用相关分析实验统计方法建立对象的数学模型——传递函数，把PID参数设计问题转化为一种非线性优化设计问题，借助于约束条件下的优化算法，以非线性最小平方指标为目标函数，将非线性约束优化算法同Simulink仿真技术相结合，找出符合控制系统品质指标的一组调节参数。

In constructing the model of the optimization of the industrial structure, the pollutant emission will be a stochastic variable, by using stochastic optimization it will solve the uncertainty problems in environmental pollution, on this basis, the author constructed a China's industrial multi-objective dynamic Stochastic optimization model, and has given model solving methods.

在产业结构优化模型中将污染物排放作为随机变量处理，应用随机优化方法解决了环境污染的不确定性问题，在此基础上构建了中国产业结构多目标动态随机优化模型，并给出了模型的求解方法。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。