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培养学生分析问题能力 提高灵活选用计算方法的探究
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作者 钱如锦 《进展》 2020年第16期142-142,共1页
《数学新课程标准》指出:“要使学生正确地进行整数、小数、分数的四则运算,对于其中的一些基本计算,要达到一定熟练程度,并逐步做到计算方法合理、灵活。”培养学生合理灵活选择计算方法的能力,关键是处理好一般计算与特殊计算、简算... 《数学新课程标准》指出:“要使学生正确地进行整数、小数、分数的四则运算,对于其中的一些基本计算,要达到一定熟练程度,并逐步做到计算方法合理、灵活。”培养学生合理灵活选择计算方法的能力,关键是处理好一般计算与特殊计算、简算规律的常规应用与变式应用的关系。通过数学教学使学生能掌握必要运算技能,能准确进行运算。计算如能选用合理、灵活的算法,则不仅可以提高计算的速度,还可以减少错误,提高计算的正确性。要使计算方法合理、灵活,就必须对不同的题目做具体的分析,根据具体情况选用算法。 展开更多
关键词 培养能力 选用算法 提高质量
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An Improved Semi-Orthogonal User Selection Algorithm Based on Condition Number for Multiuser MIMO Systems 被引量:1
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作者 LU Xinlu WU Jun +3 位作者 HUANG Xinlin LI Wenfeng LU Jianmin GONG Zhengwei 《China Communications》 SCIE CSCD 2014年第A01期23-30,共8页
In Multiple-Input Multiple-Out (MIMO) systems, the user selection algorithm plays an important role in the realization of multiplexing gain. In this paper, an improved Semi-orthogonal User Selection algorithm based ... In Multiple-Input Multiple-Out (MIMO) systems, the user selection algorithm plays an important role in the realization of multiplexing gain. In this paper, an improved Semi-orthogonal User Selection algorithm based on condition number is proposed. Besides, a new MIMO pre- coding scheme is designed. The proposed SUS- CN (SUS with condition number) algorithm outperforms the SUS algorithm for the selection of users with better matrix inversion property, thus a higher information rate for selected user pair is achieved. The designed MIMO precoding matrix brings benefits of the power equality at transmitted terminals, the limited dynamic range of the power over time, and a better power efficiency. The simulation results give the key insights into the im- pact of the different condition number value and users on the sum-rate capacity. 展开更多
关键词 Multiple-Input Multiple-Output sumrate capacity condition number semi-orthogonaluser selection
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Parameter selection of pocket extraction algorithm using interaction interface 被引量:1
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作者 KIM Chong-Min WON Chung-In +3 位作者 RYU Joonghyun CHO Cheol-Hyung BHAK Jonghwa KIM Deok-Soo 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第9期1492-1499,共8页
Pockets in proteins have been known to be very important for the life process. There have been several studies in the past to automatically extract the pockets from the structure information of known proteins. However... Pockets in proteins have been known to be very important for the life process. There have been several studies in the past to automatically extract the pockets from the structure information of known proteins. However, it is difficult to find a study comparing the precision of the extracted pockets from known pockets on the protein. In this paper, we propose an algorithm for extracting pockets from structure data of proteins and analyze the quality of the algorithm by comparing the extracted pockets with some known pockets. These results in this paper can be used to set the parameter values of the pocket extraction algorithm for getting better results. 展开更多
关键词 POCKET PROTEIN Interaction interface Protein interaction Voronoi diagram
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Cultural Binary Particle Swarm Optimization Algorithm and Its Application in Fault Diagnosis 被引量:1
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作者 黄海燕 顾幸生 《Journal of Donghua University(English Edition)》 EI CAS 2009年第5期474-481,共8页
Binary particle swarm optimization algorithm(BPSOA) has the excellent characters such as easy to implement and few set parameters.But it is tendentious to stick in the local optimal solutions and has slow convergence ... Binary particle swarm optimization algorithm(BPSOA) has the excellent characters such as easy to implement and few set parameters.But it is tendentious to stick in the local optimal solutions and has slow convergence rate when the problem is complex.Cultural algorithm(CA) can exploit knowledge extracted during the search to improve the performance of an evolutionary algorithm and show higher intelligence in treating complicated problems.So it is proposed that integrating binary particle swarm algorithm into cultural algorithm frame to develop a more efficient cultural binary particle swarm algorithm (CBPSOA) for fault feature selection.In CBPSOA,BPSOA is used as the population space of CA;the evolution of belief space adopts crossover,mutation and selection operations;the designs of acceptance function and influence function are improved according to the evolution character of BPSOA.The tests of optimizing functions show the proposed algorithm is valid and effective.Finally,CBPSOA is applied for fault feature selection.The simulations on Tennessee Eastman process (TEP) show the CBPSOA can perform better and more quickly converge than initial BPSOA.And with fault feature selection,more satisfied performance of fault diagnosis is obtained. 展开更多
关键词 cultural algorithm cultural binary particleswarm optimization algorithm fault feature selection fault diagnosis
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