查询词典 forward selection

Second, according to model characteristic, such as non-linear, non-convex, multiple-peaked and so on, the paper discusses limitation of traditional solving algorithm, such as branch and bound method, GBD method and OA method, puts forward penalty function-makeup integer algorithm and genetic algorithm, analyses procedures of genetic algorithm, such as selection, crossover and mutation, brings forward modifications for specific realized problems of genetic algorithm, such as selection of initial points, operator design, adoptive value adjustment, constraint treatment and so on, and works out correlated solving program.

其次针对该模型非线性、非凸、多峰等特点，讨论了分支定界法、GBD法和OA法等传统求解算法的局限性，提出了罚函数一凑整算法和遗传算法的求解思路，对遗传算法的选择、交叉、变异等过程进行分析，对遗传算法初始点选择、算子设计、适应值调整和约束处理等具体实现问题提出了改进措施，并编制了相关的求解程序。

To aim at the differences in the ingredients which should be considered when different cooperative partners are chosen in virtual supply chain, the evaluation index system of upstream cooperative partner, downstream cooperative partner and logistics enterprise in networked virtual supply chain are established. Based on the differences of constructive technologies of traditional supply chain, the cooperative partner selection mode of networked virtual supply chain is established. The application of AHP in cooperative partner selection of virtual supply chain is researched. The dynamic construction mechanism of networked virtual supply chain is put forward to deal with all kinds of exceptions in the supply chain execution.

之后，针对在选择虚拟供应链上的不同合作伙伴过程中考虑因素的不同，分别建立了网络化制造环境下虚拟供应链上游合作伙伴的评价指标体系、下游合作伙伴的评价指标体系和物流企业的评价指标体系；比较分析了传统供应链的组建技术，建立了网络化虚拟供应链的合作伙伴选择过程模型，并具体研究了层次分析法在虚拟供应链合作伙伴选择中的应用；提出了网络化虚拟供应链的动态组建机制，以应对虚拟供应链运行过程出现的各种例外情况。

Do the system research in the choice method of route scheme, putting forward principles, steps, procedure and the method of ecology route selection and the security route selection. This prides a powerful tool for designers in route selection process to reasonable correspond to each kind of influence factor and the solution of design principal contradiction.

系统研究了路线方案选择方法，提出了生态选线和安全选线的原则、步骤、程序和方法，为设计人员在选线过程中合理协调各种影响因素、解决设计主要矛盾提供了有力的工具。

On the aspect of urban spatial distribution DM: Adopting the conception model of combination of location and attribute, the author brings spatial coordinates, spatial relationship and attribute character into the unitive model of spatial computation, studies city's land suitableness evaluation and the method of spatial clustering in division of urban function districts and brings forward the arithmetic of classification layer. Aiming at land spatial optimization allocation, the author puts forward SGA. In this arithmetic selection, crossover and mutation operator are progressed on the space.

在城市空间分布数据挖掘方面：采用空间—属性一体化概念模型，把空间坐标、空间关系和属性特征纳入到统一的空间计算模型，分别对城市土地适宜性评价和城市功能区划分中的空间聚类方法进行了研究，并提出了一种分类图层的平滑算法；针对城市土地的空间优化配置，提出了一种空间遗传算法，该算法中的选择、交叉、变异算子都是在空间上进行的；对多要素离散空间场之间的相关性测度，定义了一种基于信息熵的规范的相关指数，并给出了计算方法。

Suggestions about the selection of the objects were put forward:(1) ultimate object:change the present one of "stabilize the valuta hence propel the national economy" to "stabilize the finance, propel the national economy, realize high employment and maintain an international balance of payments";(2) intermediate object selection: attend to not onl...

在中间目标的选择上，不仅要关注货币供应量这一指标，而且也要关注资本市场资产价格的变动。(3)在调控手段的运用上，一是要减少对法定存款准备率手段的依赖；二是要重视运用公开市场业务操作手段，增加公开市场业务操作的频率；三是要实行廉价的货币政策。(4)在我国中央银行宏观调控空间的拓展上，不仅要立足于货币市场，而且要为由货币市场传导向资本市场传导过渡创造条件

The geology research of carbonate reservoirs in Ordovician of Tahe oilfield showed that many large dissolved vugs and fractures were developed. The spread of the reservoir take on a very heterogeneous state. And the typical fractured-vuggy reservoirs was formed. According to the combination of the various spaces, the formation was divided into vuggy formation, fractured-vuggy formation and fractured formation. The research showed that development of the vug is relevant to the its position on the structure, the fractures, the water surface and the weathering surface. Multi-phase charge and recharge of the oil in the reservoirs resulted in the complexity of the fluid distribution. So the"Bottle Model"was brought forward to explain the movement of the water-oil contact. The special storage space and the complex fluid distribution lead to the unstability of the production and the complexity of the water cut. In order to explain the characteristic of the fracture-vug unit was brought forward and the basic principle and method of the partition of the fracture-vug unit was formed. The classification and evaluation of the units were performed according the reserve and energy. Based on the research of geology characteristic and the fluid flow in the reservoir the comprehensive numerical simulation plan of the fractured-vuggy reservoirs were established. Through the selection of the simulation unit, fluid flow type and parameter equivalent the triple media reservoir simulation model was established. Considering the practical application the model was resolved by the DKR decomposition conjugate grads method. Based on the fine reservoir description of Dsitrict IV of the Tahe oilfield the various space type were classified and combined together. The geology model of Unit S48 was constructed. Two typical single well model was established according to the geology and the dynamic phenomena. Finally the single well model and the Unit S48 were simulated by the triple media reservoir simulator. Via the local grid refinement and coarsening in the simulation good matchs were gained. Based on the results of the simulation the reserve distribution, percent of reserve produced in various space and the natural energy were analyzed. The fluid was storaged in the fractures and vugs mostly and more than 90% the produced oil came from the systems. The energy belonged to the active one. The results of simulation accorded with the fact and showed the validity and practicability the research and the simulator.

塔河油田奥陶系碳酸盐岩油藏的地质研究表明，其储层中发育着很多大型的溶蚀洞、缝，储层的平面展布呈现出极度的非均质性，形成了典型的缝洞型碳酸盐岩油藏，根据各种孔隙介质在储层中的组合，将储层分为了溶洞型、裂缝-溶洞型和裂缝型三类；研究表明溶洞储层的发育和构造位置、裂缝的发育、潜水面和风化面的位置等因素有关；多期充注的油气成藏模式导致了流体复杂的赋存状态，由此提出了所谓的"瓶子模型"，解释生产过程中油水界面的变化；特殊的储集空间类型和流体分布特征导致油田在开发过程中表现出很大的不确定性和含水变化的复杂性，为了合理的解释油气田开发过程中的动态特征，提出了"缝洞单元"的概念，并制定了"缝洞单元"纵横向划分的基本原则和依据及划分方法，并对"缝洞单元"进行了分类和评价；基于地质特征和流体在其中流动规律的研究，提出了缝洞型碳酸盐岩油藏的数值模拟综合解决方案，通过模拟单元的选择、流动类型和参数的等效，建立了三重介质油藏三维三相数值模拟模型，采用不完全LU分解预处理共轭梯度法进行了求解；在塔河油田4区精细油藏描述的基础上，将各种类型的孔隙空间进行了归类组合，建立了S48单元的地质模型；通过对油井生产动态进行分析研究，建立了两类和油井地质、生产动态相对应的单井模型；最后应用三重介质油藏数值模拟软件对单井模型和S48单元进行了数值模拟，通过局部加密和粗化等技术模拟流体流动规律，取得了很好的拟合效果；结合数值模拟结果，分析了各种介质中的储量分布、储量产出的百分比以及地层的能量，认为塔河油田缝洞型油藏中流体绝大多数储集于缝洞系统之中，所产出流体90%以上也来自于缝洞系统，其底水能量属于较充足的类型；模拟结果和油田实际情况符合较好，说明了地质研究和油藏数值模拟研究的正确性。

It brings forward the problems need attention in the asphalt gum mastic macadam pavement construction from the aspects of the mix ground selection,mix equipment selection,spreading equipment selection,primary material selection,and the mix,carriage,spreading and rolling confectioning etc of asphalt mixture,which will make the pavement have good anti-rut effect and sliding performance.

SMA是沥青玛脂碎石混合料的英文缩写，是由断级配粗集料、细集料、填料、纤维素和沥青结合料组成，通过严格施工形成一个紧密嵌锁的骨架结构，具有优良的抗车辙效果和抗滑性能。1拌合场地的选择沥青混合料拌合场地一般包括原材料存放的场地，沥青储存、熔化及加热设备、试验室及办

This paper presents the portfolio selection problem of two-attribute money and creates a model of portfolio selection based on two-attribute money, which can both contain the existing portfolio models and overcome the above-mentioned deficiencies. A series of new concepts is put forward, such as, holding wealth, obtainable wealth, short-term utility function, short-term expectation-variance utility function, state-expectation-variance utility function, short-term expectation-variance utility curve, long-term expectation-variance utility curve, margin utility contribution force, additional contribution force, profit-risk exchange rate and optimal portfolio expansion curve; The state-expectation-variance analytical method is developed from the expectation-variance analytical method; A set of systematic theories concerning two-attribute portfolio selection is thus established.

本文提出了两属性货币的证券组合选择问题；创建了既能包含现有证券组合选择模型又能克服上述两点不足的两属性证券组合选择模型；提出了持有财富、可获财富，短期效用函数，短期期望—方差效用函数、状态—期望—方差效用函数，短期期望—方差效用曲线、长期期望—方差效用曲线，边际效用贡献力，附加贡献力，收益—风险替换率，最优证券组合扩展线等一系列新概念；把期望—方差分析方法发展成状态—期望—方差分析方法；建立了两属性证券组合选择模型的一套系统的理论。

We put forward a new viewpoint that the purity of seed selection keeps the balance with the DNA polymorphism demand. The research aim at oak silkworm seed selection was to determine how to keep the balance between improving cultivar purity and keeping the genetic diversity within cultivar.

对品种选育的纯度与DNA多态性需求的平衡进行了讨论，并分析了对柞蚕品种选育的启示，提出了柞蚕品种选育的下一步的研究目标：寻找提高品种纯度与保持品种内的遗传多样性的平衡点。

This paper discusses the energy situation in China and put forward selection and sug- gestions for Chinese future energy...

文章分析了我国能源面临的主要形势，从保证供应、节能优先、结构优化、环境友好、市场驱动5个方面，提出我国未来能源战略的选择和建议。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。