It is difficult in the first place to see wherein the profound wisdom and genius of this march lies ; for no great intellectual effort is needed to guess that the best position for an army , when not being attacked , is where supplies are most plentiful 首先，令人难以理解的是，这一军事行动的深思熟虑和英明在什么地方，因为要知道军队所处的最佳位置当它不受攻击的时候，是在粮草多的地方这不需要动什么脑筋。
It is difficult in the first place to see wherein the profound wisdom and genius of this march lies ; for no great intellectual effort is needed to guess that the best position for an army , when not being attacked , is where supplies are most plentiful 首先，令人难以理解的是，这一军事行动的深思熟虑和英明在什么地方，因为要知道军队所处的最佳位置（当它不受攻击的时候） ，是在粮草多的地方? ?这不需要动什么脑筋。
The two systems could alternate by switch . having comprehended the puma560 robot and its controller system in detail , transmit paths of feedback signal and control signal were found out . thus , optimal positions of extract feedback signal and control signal could be determined clearly 为实现这个控制策略，作者对puma560机器人及其控制系统进行了详细的分析，找出了反馈信号及控制信号的传输路径，确定抽取反馈信号和加入控制信号的最佳位置。
The application of transverse resonance theory is firstly extended further from plane homogeneous medium to the inhomogeneous spatial region by primarily combining the current martcatili method . then the simplex method is used to calculate the source point " s best position , frequency and the correspond wavenumber of the region 重点结合已有的marcatili法，首次将横向谐振法从平面均匀分层介质中的应用进一步延伸到模拟地壳波导的三维非均匀空间区域中，再利用单纯形法，确定源点在该区域的最佳位置、最佳频率和对应的传播常数。
The great tour purchasing power is the drive power of promoting the region ' s tourism developmentln the regional space , scale economic and regional separation are one of the basic characteristics of promoting tourism industry , so we must arrange the regional tourism industry with a systematic method and give prominence to the central city . for its outstanding area in the regional space , central city has evident superiority in the regional ecnomic development , and has echelon between central city and its periphery scennic spots , which is the inducement mechanism of tourism industry ' s arranging , developing and advancing step by step . for the law of diminishing marginal utility and the theory of equilibrium , the max utility equilibrium of tourism consumption be at the point of tangency of undiscrepancy curve and the cost budget curve 中心城市居民巨大的出游力是拉动其周边旅游地发展重要的内在驱动力；由于地缘关系，区域规模经济与地域分割并存，是旅游产业运动的一个基本特征，为此必须对区域旅游经济进行系统化布局，突出中心城市的产业中心性；因其区位条件独特，中心城市在区域经济发展中居于明显的优势，与周边城乡部位存在经济发展上的梯次性，这种梯次性是区域旅游生产力布局、产业发展梯次传动，最终整体联动的经济诱导机制；根据边际效用递减规律和旅游者最大效用均衡理论，旅游消费效用最大化的均衡在无差异曲线与开支预算线的切点(即旅游目的地选择的最佳位置)上，且随着边际效用递减，目的地选择的最佳位置向远离中心城市方向移动，这就是中心城市与周边旅游地互动关系的经济学解释。
In order to deal with the complicated question of mine water decontamination plant site choice , based on the analysis of the mine water quality in wangying , wulong haizhou mining area and the distribution of industry , agriculture and population nearby , this paper applied multi - purpose fuzzy optimal choice model and gray condition decision to select the mine water purifying plant site and put forward the optimal decision 摘要针对矿井水净化处理厂厂址选择复杂的问题，以王营矿、五龙矿和海州矿为研究对象，在对其水质以及周围的工农业和人口分布进行简单分析的基础上，采用多目标模糊优选模型和灰色局势决策法对矿井水净化处理厂的厂址进行优化，确立建厂的最佳位置。
A reasonable position of driving nozzle helps to achieve the maximum material flow that also depends on other parameters such as backpressure , properties of conveyed material and driving gas . it is observed that , an increase of convergent section angle is harmful to the pneumatic conveying system , and also influences on the mass flow rate of conveyed material , the distribution of static pressures in injector and the pressure drops of conveying pipe . in addition , within a reasonable scope of air mass rate , increasing the driving jet velocity is more advantageous than enlarging the dimension of driving nozzle 试验研究发现，气体喷嘴位置对气固喷射器的输送能力影响最大，气体喷嘴存在某一最佳位置，而这一最佳位置与背压、输送物料特性和输送风特性相关联；气固喷射器的收缩角对其输送能力、内部静压分布和输送管阻力特性均有适量影响，收缩角增大对整个输送系统均不利；在适当的输送风范围内，提高气体喷嘴出口速度比扩大气体喷嘴尺寸更为有利，但气体喷嘴出口速度过高会增加气固喷射器和输送管内的能量损耗，给输送带来不利的影响；系统背压与气固喷射器的气体喷嘴出口速度的选取有关。
