可行控制

The main idea is to encourage and support the farmers to improve their farming way, and to implement the policy of castigation charge simultaneity The feasibility of the policies is analyzed with consideration of economy, technology and institution. It is concluded that the economic policies is necessary and feasible.Lastly, the further research approach to policy system for control and management of agricultural NPSP is proposed in this paper.

论文选择北京市重要水源地—密云水库的两大汇水流域之一的潮河流域为政策设计示范区，针对本区农业非点源污染的特点、成因和流域的社会经济状况，结合流域水环境规划目标，以建立的政策理论体系为指导，提出本区以鼓励扶持引导为主、收费惩罚为辅控制削减农业污染的经济政策构想，估算了对农民环保行为给予补贴、补偿的额度；基于对政策的经济、技术及制度方面的分析评价，本文认为在我国重点污染治理流域尤其是重要水环境功能保护区，制定和实施基于经济激励的农业非点源污染控制政策是必要且可行的。

Therefore, it's feasible to control the composition of inclusion in non-aluminum deoxidation steel by controlling the composition of refining slag.

因此，通过控制精炼渣的成分来控制非铝脱氧钢中夹杂物的组成是可行的。

And the result of test shows that the hardware and software and the eaton brake auto-driller system are practical and efficacious.

由此可知，本文所论述的控制方案是可行的，达到了预期的控制效果。

Based on a series of signal process and noise source identification techniques, especially the major noise source identification methods, such as expurgation method, sound intensity analysis, spectrum analysis vibro-acoustic correlation analysis and so on, the pass-by noise control of SC7080A and SC6360B are studied in detail. By the roadway and dais experiments, the major noise and radiating parts are identified and some economical controlling methods are made. For the SC7080A, to control the emissing noise from the intake and shell vibration of air cleaner, a intake muffler is installed between the air cleaner and intake valve. Based on the theory of Helmholtz resonator, One three-parallel-connected resonant silencer is designed and trial-manufactured. For the SC6360B, the attenuation performance of exhaust muffler in high frequency region is improved. To reduce the vibration noise of shell part, the structure of oil sump tank, exhaust manifold shield and exhaust manifold shield are analyzed and improved. At the same time, some measures, such as sound absorption, sound insulation, are taken to reduce the noise of engine surface emissivity and a sound shield is designed.

本文首先综述了目前国内外汽车加速噪声控制的现状、主要方法和技术措施，在此基础上，结合SC7080A和SC6350B汽车的车外加速噪声水平及现状，综合运用分别运行法、声强法、频谱分析法、声振相干函数法等现代噪声源识别方法，对SC7080A和SC6360B汽车进行了准确详细的车外加速噪声源识别并提出了经济可行的控制方案，针对SC7080A，主要在空气滤清器和进气阀门之间的进气管道上加装进气消声器，抑制空气滤清器壳体表面和进气口两处的噪声辐射，根据Helmholtz共振腔原理设计了三腔并联旁支型共振消声器，并进行了工程化设计和试制；针对SC6360B，主要改善了排气消声器在高频段的消声性能，对罩壳类零件进行了结构改进，降低了其表面噪声的辐射，并对发动机舱进行了吸声、隔声处理，设计了发动机隔声罩。

Simulation results show that it is feasible to use the proportion control in the active-suspension control.

仿真结果表明，比例控制技术应用于主动悬架控制是可行的。

Results show that the control scheme is feasible and can achieve required control e ffect.

仿真结果表明，控制方案可行，能达到预计的控制效果。

After building the mathematical model of marine impellent system by means of MATLAB,this paper adopted traditional PID algorithm and used the genetic algorithm to regulate the parameters of PID controller for making simulation and analyses on the speed control system of certain ship.

利用MATLAB建立了船舶推进系统的数学模型，采用传统的PID算法，并利用遗传算法整定PID参数，对某船航速控制系统进行了仿真分析。为反映真实情况，文章分别仿真了船舶在无干扰、5%、10%及20%干扰情况下航速及螺旋桨转速等参数的变化，仿真结果显示遗传算法整定PID参数用在船舶航速控制系统上是可行的

Using the method of unit matrix synthesis to solve the coupling problem between the paper pulp flux and the steam press in the papermaking process.

运用单位矩阵解耦控制方法，解决造纸过程中纸机网前箱系统中纸浆流量和蒸汽压力的耦合问题；并在实验室的纸机网前箱的模型中予以实际应用，实验结果表明：该解耦控制算法是可行的，有一定实用价值。

The thesis mainly researches on the single phase AC/AC converter in the topologies including AC_Buck and AC_Cuk. Firstly, the operating principles of the two converters are analyzed in detail and the rules of their parameters design are educed; The commutation of their power switches which is the key of these topologies to realize is analyzed in detail and a feasible solution which can be named RCD-Commutation mode is presented and proved effectual by theory analyses and simulation results.

本文首先分析了AC_Buck变换器的变换原理，得出了电路参数设计准则；继而对电路实现的难点即功率管换流问题进行了深入分析，并得出了一种可行的解决方案即RCD换流方案；作为对简单拓扑单相直接AC/AC变换器控制策略的探索，本文以AC_Buck为平台，对电压单闭环瞬时值控制方案进行了研究，在理论分析和仿真研究的基础上设计并制作了一台采用RCD换流、电压单闭环瞬时值控制的AC_Buck变换器原理样机。

The experiment and the research indicate that:(1) Through the Hot-Continuous-Rolling production technics under small reduction ratio of 4.04 and 5.08, the rectangular continuous-casting billet of 235×265mm can be used to produce big size steel stick of Φ140mm and Φ 125mm whose macrostructure and mechanical properties meet the standards, this technics is viable;(2) This rolling technics can make the deformation penetrate to the center of the billet by low temperture and low velocity and big roller diameter and large reduction quantity at every pass and optimum design and arrangement of rollers, which is the key of Hot-Continuous-Rolling technics under small reduction ratio;(3) The sending technics used in Xining Special Steel Co.,Ltd can not use waste-heat of billet adequately, but the sensitive temperature section of A1N or sulphides or inclusions separating out is avoided, creating a favorablecondition for insuring good surface quality of final rolled steel;(4) The Hot-Continuous-Rolling technics under small reduction ratio has a close relationship with the billet quality control and the hot sending process control and the cooling control after rolling.

通过实验研究表明：(1) 235×265mm矩形连铸坯分别采用4.04和5.08的小压缩比热连轧生产工艺，所生产的Φ140mm和Φ125mm的大规格棒材，其低倍组织和机械性能均符合标准要求，该工艺是可行的；(2)本实验所采取的低温低速、大辊径大道次压下量轧制工艺加上轧辊孔型的优化设计与配置，可以使加工变形渗透到铸坯的中心，这一点是实现小压缩比热连轧生产工艺的关键；(3)西宁特钢在红送过程中虽然铸坯余热未能得到充分的利用，但是有效地避开了A1N、硫化物的析出及夹杂物偏析的敏感温度区，为保证最终轧材良好的表面质量创造了有利的条件；(4)小压缩比热连轧生产与铸坯质量控制，热送过程控制以及轧后冷却控制密不可分。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。