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On this basis, according to historical data, apply ANN and differential simulation method to get the quantitatively correlative relations between each production and its own influence factors, and introduce the new methods of prediction for dynamic indexes with gas-field development (The combinatorial prediction method based on fuzzy comprehensive evaluation, the method of ANN to select optimally combinatorial prediction models and the ANN prediction method based on genetic algorithm).(2) Base on mathematical programming, combine with quantitative economics and techno-economics, introduce economical indexes to establish production"s distribution optimal model, production"s constitution optimal model and measured production"s constitution optimal model, including multi-objective models and five-years models. Upon this, the optimal project for all gas field and each gas-collected factory can be got. Also, introduce the time value of capitals to improve on these models.(3) Base on the optimal solution theory and algorithm theory for the nonlinear programming problem, introduce the SUMT algorithm and genetic algorithm to study how to solve the models, and on the basis of normal genetic algorithm, make use of auto-adaptively modulating method to improve on normal genetic algorithm; Base on algorithm"s convergence theory and calculation"s complexity theory to analyze seriatim SUMT algorithm"s convergence and genetic algorithms convergence, and compare performance with each other.

在此基础上，利用神经网络方法和微分模拟方法根据历史数据得到各分项产量与其影响因素之间的定量关联关系，并引入气田开发动态指标新的预测方法(基于模糊综合评判的组合预测方法、神经网络优选组合预测模型预测方法以及基于遗传优化的神经网络预测方法)；(2)以数学规划为基础，结合数量经济学和技术经济学，引入经济指标建立产量分配优化模型、产量构成优化模型、措施产量构成优化模型、气田开发多目标规划模型以及五年规划模型，进而获得全气田及各采气厂的最优方案，并引入资金时间价值对五年规划模型进行改进；(3)以非线性规划问题的最优解及算法理论为基础，引入SUMT算法以及遗传算法对模型的求解进行研究，并在原有的遗传算法基础上，引入自适应调整方法对遗传算法进行改进；以算法的收敛性理论和计算复杂性理论为基础，逐一分析SUMT算法以及遗传算法的收敛性，并比较三种算法的优劣性。

Series cartridges offer an economical solution for all of your general-purpose water filtration needs.

系列炭纸滤芯为所有日常水处理提供了一个经济的解决方案。

Because of governments policy and the economical difficulty, the border medical service work had to break off or turn over the government.

由于政府的政策规定以及外部联系中断之后在经济上已难以为继，边疆服务部遂将其卫生服务事业逐步停办或移交政府接办。

In the article,the author mainly analysed that by using shadow price,and through the variety of the constrained conditions, the policymaker would find the means to inerease economical benefits.

重点分析了利用"影子价格"的概念，通过对约束条件的变化，为决策者提供增加经济效益的途径和方法。

The design of safe economical shoring is essential to a successful project.

安全经济的利用支柱的支撑的设计对一个成功的计画是很重要的。

On the condition that side post and mid-post of most greenhouses use different sections at present the proposed methods can get better technical and economical effects in the design of greenhouse steel structure frame.

在当前温室中柱和边柱普遍采用不同截面的情况下，利用该文的方法对温室钢结构框架进行设计，可以取得较好的技术和经济效果。

The recent developments in the siltation promotion and erosion control techniques are introduced, and it is pointed out that the developing trends of these techniques are safe, economical, efficient and environment-friendly.

介绍了促淤防冲技术的最新发展动态，指出安全、经济、高效和环保是其发展趋势，建议采用施工易、造价低和阻水小的结构和轻质材料。

It is a simple, economical and efficient sampling technology for infrared spectroscopy.

提高了工作效率，是一种廉价适用、值得推广的红外光谱制样方法。

So, even though it is more economical to singe first, in some cases it is advantageous to modify or reverse the sequence of these finishing operations.

因此，尽管先烧毛比较经济，但在某些情况下还是修改或变更处理工序的先后顺序。

So, even though it is ore economical to singe first, in some cases it is advantageous to modify or reverse the sequence of these finishing operations.

因此，尽管先烧毛比较经济，但在某些情况下还是修改或变更处理工序的先后顺序。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。