The salinity was used as the standard material and water semi-exchange time was calculated.
利用Nortek AquadoppTM水流剖面仪对黎安港口门处的潮流情况进行了28 h的垂直剖面连续观测,结合潮位历史资料,分析了黎安港的潮汐特征,计算了该港的纳潮量,同时,以盐度作为标准物质,计算了海水半交换周期。
The reclamation status before 2002 around the city is set as the actuality and the variation of the water exchange capacity of the three estuaries during different stages is simulated,and the results are used to analyze the variation of the semi-renewal period of each estuary during different reclamation stages.
在建立温州近海及河口二维潮流数值计算模式的基础上,建立了该区域的水交换数学模型,并以2002年为基准水平年,利用该模型对温州市在建和拟建的围垦工程对瓯江、飞云江和鳌江河口水交换能力的影响进行了模拟,探讨了各个河口对应于不同阶段围垦工程的水交换半更换期的变化,指出随着时间的增加,河口内污染物总量受涨、落潮流的影响呈波动状态,涨潮时增大,落潮时减小,总体呈逐渐减少的趋势,其中,瓯江口现状情况下半更换期为12 d左右,近期工程和中期工程后,半更换期为13 d左右,远期工程后,半更换期接近14 d;而飞云江口和鳌江口不同时期围垦方案的半更换期变化不大,其中飞云江口的半更换期约为7~9 d,鳌江口的半更换期约为1。
Some relations among weak α-skew Armendariz rings,α-rigid rings,α-SC rings and semicommutative rings are studied by some examples.
研究了弱-αskew Armendariz环、-αrigid环、α-SC环以及半交换环的关系。
Then U_n(R) is not a semicommutative ring.
则Un(R)不是半交换环。
In this paper,a kind of graph structure of a commutative semi-group S with zero element is defined and studied.
在交换半群上定义了一种图结构 ,并对相应的图的性质进行了描述。
In this paper,a new commutative semi-group is established,and the results of the papers "the Expression Form of a Commutative Semi-group"and "the Extension and Application of Commutative Semi-group" are genelized and strengthed.
建立了一类新的交换半群,对《一个交换半群的元素的表示形式》、《一个交换半群的推广与应用》两文中半群的元素表示形式和结果进行了推广与加强。
Based on the number set,a new commutative semi-group is established in the integer number and extended in number fields of rational number,real number and the complex number.
在数集的基础上,在整数域上建立了一个新的交换半群,并在有理数域、实数域和复数域上进行了推广;作为应用,讨论了其元素的表示形式。
The Connection of the Locally Compact Commutative Semigroup and Infinite Closed Subsemigroup;
局部稠密的交换半群与无限闭子半群的关系
A LIMIT THEOREM FOR CONVOLUTION ITERATES OF A PROBABILITY MEASURE ON COMPACT ABELIAN SEMIGROUP
紧交换半群上概率测度卷积幂的一个极限定理
Application of Commutative Semi-group in Soluting a Binary Indefinite Quadratic Equation;
一类交换半群在求解二元二次不定方程中的应用
Research and Applications in Cryptography Based on the Nocommutative Monoid;
非交换（壹）半群在密码学中的应用研究
The Full h-ideals of an Additively Inverse Semirings in Which Addition is Commutative and the Left Ideals of Some Ordered Semigroups;
交换逆半环的全h-理想及若干序半群的左理想
Simple ideal extension of a group of prime order by a finite commutative nilpotent semigroup on a tree
素数阶群按树上有限交换幂零半群的单纯理想扩张
The maximal regular subsemigroups of singular order-preserving transformation semigroups
奇异保序变换半群的极大正则子半群
semi-automatic private branch exchange
半自动专用小交换机
uliar to a seminatural economy
半自然经济的物物交换
semielectronic telephone switching system
半电子制电话交换机
The Influence of SS-semipermutable Subgroups on the Structure of Finite Groups
ss-半置换子群对有限群结构的影响
Finite groups with X-s-semipermutable primary subgroups
具有X-s-半置换的准素子群的有限群
Maximal Subsemigroups of D-classes of Finite Full Transformation Semigroup T_n;
有限全变换半群T_n的D-类的极大子半群
The Complete Classification of the Maximal Subsemigroups of Finite Order-preserving Transformation Semigroup O_n;
有限保序变换半群O_n的极大子半群的完全分类
The Subsemigroups of Finite Singular Orientation-Preserving Transformation Semigroups;
有限奇异方向保序变换半群SOP_n的子半群
On the Properties of Tow Subsemigroups of the Transformation Semigroup
关于变换半群的两类子半群的若干性质
Non-Abelian Subgroup of Order p~3 Contained in the Frattini Subgroup of p-Groups;
p-群Frattini子群中p~3阶非交换的子群
The groups of the solvable equations are commutative.
可解方程的群都是交换群。