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仁用杏新品种“优一系”丰产优质高效栽培关键技术
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作者 李春宇 《中文科技期刊数据库(全文版)自然科学》 2021年第4期60-60,共1页
针对辽西地区的自然气候特点与立地条件,分述了仁用杏新品种“优一系”的丰产优质高效栽培关键技术,寄希对辽西地区及周边地区仁用杏栽培起到借鉴与指导作用。
关键词 辽西地区 仁用杏 优一系 栽培
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A Probe Method of Gradient Projection Type
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作者 朱建青 靳丽丽 《Chinese Quarterly Journal of Mathematics》 CSCD 1999年第1期102-110, ,共9页
In this paper,a probe method for nonlinear programming wiht equality and inequality is given. Its iterative directions at an arbitrary point x can be obtained through solving a liear system. The terminate conditions a... In this paper,a probe method for nonlinear programming wiht equality and inequality is given. Its iterative directions at an arbitrary point x can be obtained through solving a liear system. The terminate conditions and choices of the parameters are given. The global convergence of the method is proved. Further more,some well known gradient projection type algorithms [1-15] and new gradient projection type algorithms from the linear system are given in this paper. 展开更多
关键词 linear system gradient projection probe method global convergence
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A SISO mixed H2/l1 optimal control problem and its solution
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作者 吴俊 胡协和 褚健 《Journal of Zhejiang University Science》 CSCD 2004年第1期68-74,共7页
Study of the SISO mixed H2/l1 problem for discrete time systems showed that there exists a unique optimal solution which can be approximated within any prescribed missing error bound in l2 norm with solvable suboptima... Study of the SISO mixed H2/l1 problem for discrete time systems showed that there exists a unique optimal solution which can be approximated within any prescribed missing error bound in l2 norm with solvable suboptimal solutions and solvable superoptimal solutions. 展开更多
关键词 Mixed H 2/l 1 problem EXISTENCE UNIQUENESS Approximation
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One-Dimensional Optimal System and Similarity Reductions of Wu–Zhang Equation 被引量:1
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作者 熊娜 李玉奇 +1 位作者 陈俊超 陈勇 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第7期1-11,共11页
The one-dimensional optimal system for the Lie symmetry group of the(2+1)-dimensional Wu–Zhan equation is constructed by the general and systematic approach. Based on the optimal system, the complete and inequivalent... The one-dimensional optimal system for the Lie symmetry group of the(2+1)-dimensional Wu–Zhan equation is constructed by the general and systematic approach. Based on the optimal system, the complete and inequivalent symmetry reduction systems are presented in the form of table. It is noteworthy that a new Painlev integrable equation with constant coefficient is in the table besides the classic Boussinesq equation and the steady cas of the Wu–Zhang equation. 展开更多
关键词 Wu–Zhang equation optimal system similarity reduction Painlev integrability
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ONEOptimal:A Maple Package for Generating One-Dimensional Optimal System of Finite Dimensional Lie Algebra
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作者 苗倩 胡晓瑞 陈勇 《Communications in Theoretical Physics》 SCIE CAS CSCD 2014年第2期160-170,共11页
We present a Maple computer algebra package, ONEOptimal, which can calculate one-dimensional optimal system of finite dimensional Lie algebra for nonlinear equations automatically based on Olver's theory. The core... We present a Maple computer algebra package, ONEOptimal, which can calculate one-dimensional optimal system of finite dimensional Lie algebra for nonlinear equations automatically based on Olver's theory. The core of this theory is viewing the Killing form of the Lie algebra as an invariant for the adjoint representation. Some examples are given to demonstrate the validity and efficiency of the program. 展开更多
关键词 group-invariant solutions optimal system group classification Lie algebra symbolic computation
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