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Search Results: 1 - 10 of 250091 matches for " 李炯 "
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N阶完全图K_N的t边着色

科学通报 , 1983,
Abstract: 如果N阶完全图K_N的边用t种颜色着色,则K_N称为是t边着色的。图F_i,l≤i≤t的Ramsey数n(F_1,…,F_i)是这样的最小正整数,使得对于任意一个i边着色完全图K_n,都可以在其中找到某个子图F_i,它是用第i种颜色着色的。当F_1=
严格k可约n竞赛图的计数

科学通报 , 1985,
Abstract: 如果n竞赛图T_n中任意n—k 1子竞赛图都是可约的,则T_n称为k可约的。如果T_n是k可约的,但不是k 1可约的,则T_n称为严格k可约的。设t(n)和s(n)分别表示n竞赛图和强n竞赛图的所有同构类的个数。对于给定正整数k,设
比赛图的得分向量

科学通报 , 1985,
Abstract: 设T_n表示n比赛图,依照L.Lovász,如果T_n.中任意n 1-k个顶点诱导的子比赛图都具有性质P,则T_n称为k-P的,这里P表示比赛图的不变性质,比如强性,可约性,等等。如果T_n是k-P的,但不是(k 1)-P的,则T_n称为严格k-P的。特别,1-P T_n等价于P的。严格1-P T_n简称为严格P的。设R=(r_1,r_2,…,r_n)是T_n的得分向量,
严格k可约n竞赛图的计数

科学通报 , 1985,
Abstract: 如果n竞赛图T_n中任意n—k+1子竞赛图都是可约的,则T_n称为k可约的。如果T_n是k可约的,但不是k+1可约的,则T_n称为严格k可约的。设t(n)和s(n)分别表示n竞赛图和强n竞赛图的所有同构类的个数。对于给定正整数k,设
比赛图的得分向量

科学通报 , 1985,
Abstract: 设T_n表示n比赛图,依照L.Lovász,如果T_n.中任意n+1-k个顶点诱导的子比赛图都具有性质P,则T_n称为k-P的,这里P表示比赛图的不变性质,比如强性,可约性,等等。如果T_n是k-P的,但不是(k+1)-P的,则T_n称为严格k-P的。特别,1-PT_n等价于P的。严格1-PT_n简称为严格P的。设R=(r_1,r_2,…,r_n)是T_n的得分向量,
一类竞赛图

科学通报 , 1987,
Abstract: Müller和Pelant已经证明,如果T是n阶非传递竞赛图,n≥5,则T的所有n-2阶子竞赛图具有相同的得分序列的充要条件是,T为二重正则的。在本文中,我们确定所有n-1阶子竞赛图具有相同的得分序列
N阶完全图K_N的t边着色

科学通报 , 1983,
Abstract: 如果N阶完全图K_N的边用t种颜色着色,则K_N称为是t边着色的。图F_i,l≤i≤t的Ramsey数n(F_1,…,F_i)是这样的最小正整数,使得对于任意一个i边着色完全图K_n,都可以在其中找到某个子图F_i,它是用第i种颜色着色的。当F_1=
石莲子与苦石莲是两种药

中国中药杂志 , 1990,
Abstract: <正>《中国中药杂志》1989;14(12):14报道:石莲子的广西习惯用药为苦石莲。笔者认为该报道是欠确切的。事实上,广西使用名为“石莲子”的中药有二种:一种为睡莲科植物
巨型水库群防洪发电联合优化调度研究与应用
Joint Operation of Flood Control and Hydropower Generation for the Multi-Reservoir System
 [PDF]

郭生练, ,
Journal of Water Resources Research (JWRR) , 2012, DOI: 10.12677/jwrr.2012.11001
Abstract: 针对三峡和清江梯级巨型水库群防洪发电补偿联合调度问题,分别建立了梯级单独和水库群联合防洪优化调度数学模型,以发电量最大为目标的水电站群联合调度模型,采用POA算法分别计算两个梯级单独运行和梯级联合运行在不同准则下的防洪标准和电力补偿效益。选取长江宜昌站1954、1981、1982和1998年为典型年推求设计洪水过程线,梯级单独和水库群联合调度分别可使荆江河段的防洪标准提高到150年168年。选择1982~1987连续水文周期年的日径流资料进行计算,与设计方案相比,三峡梯级和清江梯级联合调度后的弃水量分别减少了577.41亿m3和53.84亿m3,年平均发电量增加了59.92亿kW?h,即增加了5.37%,发电补偿效益十分显著。
Joint operation of flood control and hydropower generation for the Three Gorges cascade and Qingjiang cascade reservoirs in China was studied in this paper. The flood control and hydropower generation models were established for individual and joint operation of the cascade reservoirs. The models have considered reservoir flood prevention storage and electric compensation benefits among cascade reservoirs and were solved by the progressive optimality algorithms. Four typical years of 1954, 1981, 1982 and 1998 of the Yichang hydrological stations were selected to derive the design flood hydrographs. The results show that the average of Jingjiang River flood control standards can be raised to and 150-year and 168-year return periods respectively. The daily inflow data of consecutive hydrological years of 1982 - 1987 were used to test the models. Compared with the design operation rules, the joint operation of the multi-reservoir system can generate 5.992 billion kWh of extra power annual or an increase of 5.37% by the objective function of maximum hydropower generation. Through reservoir storage compensation, the spilled water of the Three Gorges and Qingjiang cascade reservoirs was decreased by 57.741 and 5.384 billion m3, respectively.
原子核空间结构表述的一种新方法——金刚石结构
A New Method of the Expression of the Atomic Nucleus Space Structure—The Diamond Structure
 [PDF]

, 冬晓, 朱永强
Modern Physics (MP) , 2013, DOI: 10.12677/MP.2013.34021
Abstract: 本文揭示了原子核空间表述的一种新方法即原子核中每一个中子和质子都有它们的空间位置:一般质子处在金刚石结构中体心位置而中子处在面心位置,它们靠核力键相互顶紧,并以它们的质心位置无序地旋转,从而来确定每一种原子核的结合能、质量、大小和电荷分布。原子核的空间结构还可以决定哪些原子核具有转动能级、振动能级、超变和电四极矩等性质。
This paper reveals that the new method is one of the express of the space structure of the atomic nucleus and that any neutron and proton have their space place in atomic nucleus: generally speaking, the proton has the place of the body-centre and the neutron has the place of the face-centre in the diamond structure. They withstand each other by nuclear force’s bond, and they are un-orderly spinning with the place of their mass centre, with the result that it can decide the binding energy, mass, body and distribution of the nuclear charge for any atomic nucleus. And the space structure of the atomic nucleus can decide which atomic nucleus has spinning energy level, vibration energy level, hyperchange, electric quadrupole moment and so on.
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