元控制 meaning in English
meta-control
Examples
- Combining the interval arithmetic with the traditional finite element method ( fem ) , the static governing equations of interval finite element method can be set up to get the interval static response of structure directly
将区间分析和适当的有限元方法相结合，可建立直接求解静力响应区间的区间有限元控制方程。 - According to the heat conduction spreading only in the direction of local surface normal on infinitesimal control surface and laser machining reaching steady state instantaneously , a three - dimensional transient partial differential equation was translated into a one - dimensional constant differential equation
根据在微元控制面上热传导只发生在表面法向，并且激光加工在暂态达到准稳态，将三维暂态偏微分方程转化为一维常微分方程。 - The neuron control method with self - tuning gain is proposed for a ph neutralization process . in this control system , the fuzzy t - s model is used to predict the control signal . the neuron controller gain is calculated according to the parameter estimation and experience formulas
针对具有严重非线性特性的ph中和过程，提出了一种模糊增益自整定神经元控制方法，这种方法采用t - s模糊推理估计下一时刻的控制量，并通过参数估计和经验公式来计算出神经元控制器的增益。 - From looking at present , the rural environmental question worsen day by day under the control with urban and rural areas two system , but the level of environmental consciouseness of western rural public is on the low side . in the long term , it is a long - term and arduous task that the western ecological environment is rebuilted . the measures , such as policy , fund , technology , etc . are careless and indispensable , but must realize that it is primary decisive factors to guide people ' s behavior through the effective environmental education
从当前看，城乡二元控制体系下农村环境问题日趋恶化，而西部农村公众环境意识水平偏低；从长远看，西部生态环境重建是一项长期而艰巨的任务，政策、资金、技术等措施固不可少，但必须看到，通过有效的环境教育引导人们的行为是首要的决定性因素。 - Second , the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model , which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system . third , the normal running process is analyzed and calculated by means of rational matching theory , which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator . fourth , the simulation software with dynamic characteristic is designed , which can be applied to calculate thernio - parameter of cryogen , air humidity and frost thickness under different initial and boundary conditions , and to carry out dynamic simulation under conditions of dryness , wetness and frostiness , at the same time , to achieve detection and simulation at any stage from starting to stopping
本文的主要内容如下： 1 )对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2 )对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3 )对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4 )编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。