negative pressure systems meaning in Chinese
负压系统
Examples
- Through studying it is shown that in chagan sag , the geothermal gradients in the center are higher than those around the sag margin and major factors influencing the characteristics of temperature field distribution are the property of geotectogenesis and the differences in tectonic portion , lithology and underground water behaviour ; there are three types of mudstone compaction , i . e . normal compaction , undercompacition and overcomepaction ; there are two pressure systems in sandstone reservoirs , i . e . normal pressure and negative pressure systems and the strata ' s being uplifted and denuded is the key factor leading to the formation of the negative pressure system in reservoir ; and the distinctive temperature - pressure field characteristics in the sag are possessed of important petroleum geological significance in hydrocarbon source maturity , hydrocarbon generation , widening on oil and gas exploration domain and selecting exploration targets , etc
研究表明，查干凹陷中心的地温梯度高于凹陷边缘，大地构造性质及所处构造部位、岩性与地下水活动的差异是影响凹陷地温场分布特徵的主要因素；泥岩压实存在正常压实、欠压实和过压实三种类型，砂岩储层段压力类型可分为正常和负压两个系统，地层抬升剥蚀是导致储层负压系统形成的主导因素；凹陷独特的温压场特徵对烃源岩成熟、油气生成、油气勘探领域的扩大及勘探方向的选择等具有重要的油气地质意义。 - Usually we linearize them approximately in industrial process , but in some cases this ca n ' t satisfy the request of automatic control which makes us consider the nonlinear factors in the industrial process . in practical process of power plants the typical structure nonlinear case is dead - zone and the latter case is the nonlinear variance of objects ' parametres with the changes of working condition . the nonlinear research is parallel with the linearity and adaptive method can be used to deal with nonlinear cases . in this paper two adaptive control methods are used to solve the problems brought by the dead - zone of boiler negative pressure system and the nonlinear changes of the milling system ' s character parameters , which achieved good results
在生产中通常对非线性作近似线性化处理；但在某些情况下线性近似达不到自动控制的要求，必须对生产过程中的非线性情况进行考虑。在火电厂的实际生产中，典型的结构非线性之一是死区；参数非线性多发生在控制对象特性随工况变化而变化，表征其特征参数变化呈非线性。非线性控制的研究与线性控制的研究是并行的，针对非线性情况，可以采用自适应的控制方法。