The Ring of Invariants of Three (3 × 3)-Matrices over a Field of Prime Characteristic

We find a minimal system of generators and a homogeneous system of parameters for the algebra of invariants of three matrices of third order over a field of an arbitrary characteristic.     

常系数非齐次线性递推式的显式解

应用生成函数的方法求出了常系数非齐次线性递推式的显式解。     

规模化牧场开发沼气发电效益好

沼气利用在我国目前多作生活燃能,用于发电的还很少,而且能真正坚持下去的成功报导也不多.本文介绍下(土布)畜牧场4年多来的沼气发电的成功经验,旨在有助于推动规模化畜牧场在沼气能源方面的开发利用,以获取更多、更好的经济、社会、环境的综合效益.     

回转式电火花展成加工的计算机仿真

介绍了回转式电火花展成加工的原理及特点，并对该加工方法的成形运动进行较深入的分析，给出了在Delphi6环境中实现加工过程的计算机仿真。     

Symplectic Generating Functions and Moyal Products

We introduce an affine-invariant version of generating functions of symplectic transformations of affine symplectic spaces, together with a generalization for other symmetric symplectic spaces. The composition of these functions has a nice connection with the Moyal product.     

A（n,4）与A（n,5）的精确公式与简单公式

设Ａ（ｎ,ｋ）表示不定方程ｋ∑ｉ＝１ｉｘｉ＝ｎ非负整数解的个数,给出了Ａ（ｎ,４）与Ａ（ｎ,５）的精确公式及求得应简单公式的方法。     

利用虚盘技术改进 NCP 生成过程

ＮＣＰ（ＮｅｔｗｏｒｋＣｏｎｔｒｏｌＰｒｏｇｒａｍ）是通讯控制器上运行的网络管理软件,当网络资源发生变化或网络参数修改时,ＮＣＰ都要重新生成,其生成时间直接影响到网络使用效率．本文陈述了ＮＣＰ的生成过程并通过引入虚盘技术,改进了ＮＣＰ生成过程,有效地缩短了其生成时间．     

一类Lucas数方幂和

设Un，Vn是Lucas数，实数d≠0，使用发生函数方法给出下面形式方幂和计算公式：∑k=1^nUk^rd^k，及∑k=1^n（-1）^kUk^rd^k。     

Allocation of power generating and shipping of Hanjiang upstream cascade

The optimal model and simulating model of the Hanjiang cascade reservoirs operation with one day as its calculating period are established to coordinate the contradictions between power generating and shipping. The optimal model is solved by progressive optimality algorithm method adopting the theory of large system decomposing and coordinating. By analyzing the water allocation results obtained from six schemes, which are two cascades, four cascades and seven cascades joint operation considering shipping or not, the contradiction degree between power generating and shipping is investigated and some joint operation schemes are proposed.     

Technical Breakthroughs in the Construction of TGP

1Introduction　TheThreeGorgesProject(TGP)isavitalbackboneprojectinthedevelopingandharnessingoftheYangtzeRiver.Asamulti purposehydro developmentprojectthatcanproducecomprehensivebenefitsmainlyinfloodcontrol,powergenerationandnavigationimprovement,TGPwillexertasignificantimpactonthenationalsocio economicdevelopmentofChinaafteritscompletion .Withthenormalpoollevel (NPL)at1 75m ,thereservoirhasatotalstoragecapacityof39 3billionm3 .Theprojectiscom posedofadam ,twopowerplantsandnavigationfacil…