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注采工程自动模拟优化技术研究与应用
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作者 崔高祥 《中文科技期刊数据库(全文版)自然科学》 2021年第7期212-212,共1页
受摩阻效应、加速因子及管柱结构复杂影响,M储气库注采气井筒压力、温度预测误差较大,导致流静压等测试资料录取频率以及电动节流阀无效动作次数增加,大幅度提高生产成本,难以实现提质增效目的,为此开展注采工程自动模拟优化技术研究,... 受摩阻效应、加速因子及管柱结构复杂影响,M储气库注采气井筒压力、温度预测误差较大,导致流静压等测试资料录取频率以及电动节流阀无效动作次数增加,大幅度提高生产成本,难以实现提质增效目的,为此开展注采工程自动模拟优化技术研究,包括修正井筒温度压力耦合算法、完善摩阻模型以及历史数据拟合等,提高模型预测精度13个百分点,现场应用效果较好,创效800余万元。 展开更多
关键词 注采工程 自动模拟技术 研究与应用
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改进单神经元PID控制器在自动送钻模拟加载中的应用
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作者 王潜龙 冯全科 +1 位作者 刘维湘 周为 《天然气工业》 EI CAS CSCD 北大核心 2004年第5期65-67,共3页
自动送钻是指钻机在正常钻进过程中 ,不依靠司钻调节 ,而是按钻井工艺要求 ,让送钻装置在给定的条件下实现钻头的自动给进。自动送钻装置可以消除人工控制的缺点 ,能提高钻井质量和经济效益。出于对安全性和可靠性的考虑 ,必须在实际钻... 自动送钻是指钻机在正常钻进过程中 ,不依靠司钻调节 ,而是按钻井工艺要求 ,让送钻装置在给定的条件下实现钻头的自动给进。自动送钻装置可以消除人工控制的缺点 ,能提高钻井质量和经济效益。出于对安全性和可靠性的考虑 ,必须在实际钻机上应用该装置前进行模型模拟实验 ,为自动送钻控制技术的现场推广应用奠定基础。针对钻井过程中的非线性、不确定性和实时性要求 ,采用改进的单神经元PID控制器实现自动送钻模拟加载。实验结果表明 ,和传统的PID控制相比 ,改进单神经元PID控制器的反应速度快 ,振荡幅度小 ,并且稳态误差小。采用改进单神经元PID控制结构简单 ,易于实现 。 展开更多
关键词 PID控制器 自动送钻模拟加载技术 钻机 钻进过程 PID控制算法
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Improved Genetic Algorithm Application in Textile Defect Detection 被引量:1
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作者 耿兆丰 李蓓蓓 赵志宏 《Journal of Donghua University(English Edition)》 EI CAS 2007年第3期350-353,共4页
Based on an efficient improved genetic algorithm, a pattern recognition approach is represented for textile defects inspection. An image process is developed to automatically detect the drawbacks on textile caused by ... Based on an efficient improved genetic algorithm, a pattern recognition approach is represented for textile defects inspection. An image process is developed to automatically detect the drawbacks on textile caused by three circumstances: break, dual, and jump of yams. By statistic method, some texture feature values of the image with defects points can be achieved. Therefore, the textile defects are classified properly. The advanced process of the defect image is done. Image segmentation is realized by an improved genetic algorithm to detect the defects. This method can be used to automatically classify and detect textile defects. According to different users' requirements, different types of textile material can be detected. 展开更多
关键词 TEXTILE defect detection Genetic Algorithms
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Preliminary Study on Simulation of Global Seismic Activities with Global Strain Rate
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作者 Wang Wuxing Shi Yaolin 《Earthquake Research in China》 2014年第2期164-176,共13页
The relationship between the strain rate field observed by GPS and global distribution of strong earthquakes is analyzed in this work. How do we recognize the characteristics of global seismic activities with space ob... The relationship between the strain rate field observed by GPS and global distribution of strong earthquakes is analyzed in this work. How do we recognize the characteristics of global seismic activities with space observation technology? A preliminary model of Cellular Automata that could simulate the global seismic activities both in time and space has been established based on the results of global strain rate field provided by the GSRM Program. The grid of the model is evenly divided,which is consistent with that of GSRM.The status of each cell is its strain state,and is adjusted according to the evolution rules.Maximum shear strain criterion is adopted in the evolution of the Cellular Automata. The threshold for cells in surface expansion is 80% of that for those in compression. The preliminary model could in general simulate the main characteristics of the distribution of the global seismic activities. It could exhibit in general the global distribution of weak and active tectonic activities. Although the preliminary Cellular Automata model needs to be improved in many aspects,the result suggests the possibility of modeling the general features of rather complicated global seismic activities based on the strain rates obtained by GPS and other observations. 展开更多
关键词 Global strain rate Cellular Automata SIMULATION Seismic activity
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Electro-Mechanical Phase Shifters Based on MEMS Structure
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作者 Antonenko Anton Sergeevish Geraimchuk Michael Dem'yanivich Dubrovka Fedir Fedorovich 《Journal of Mechanics Engineering and Automation》 2013年第7期421-423,共3页
The aim of the study of phase shifter on MEMS (micro-electro-mechanical systems) structures was to minimize the dimensions of the design achievement. Also, the main task was to achieve the reliability and durability... The aim of the study of phase shifter on MEMS (micro-electro-mechanical systems) structures was to minimize the dimensions of the design achievement. Also, the main task was to achieve the reliability and durability of the device. The calculation was based on the optimization technique (step by step) and the modeling of individual parts of the device, namely MEMS-keys that perform the main function--switching. The urgency of this problem is the development and study of one device as a universal, that is, automatically switches from two signals simultaneously. Designs are original and devises are the intellectual property of the authors. The program for modeling phase shifters Computer Simulation Technology Microwave Studio and its results are presented in the paper. 展开更多
关键词 MEMS phase shifter dielectric layer.
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