用自由落体仪测重力加速度实验的研究

本文在对自由落体仪做深入研究的基础上，指出了用自由落体仪侧重力加速度实验的主要误差来源和仪器存在的问题，给出了减小误差和改进仪器的办法。     

露天矿内部排土模拟优化研究

针对露天矿内部排土场的开辟特点，建立了岩石扩充内排和分区内排的模拟模型和运输功最小的线性规划模型。并结合矿山实际，分别对岩石的内排进行了多方案的模拟优化计算。     

数据挖掘在人口普查信息系统中的应用

科技的发展使得数据挖掘广泛地运用在了商业、政府等各个领域的数据分析中;笔者分析了数据挖掘技术的基本原理及其方法;透析了数据挖掘技术在人口普查信息分析中的应用及现实价值.     

Characterization of Type p Banach Spaces by the Weak Law of Large Numbers

For weighted sums of the form ∑j＝1anjXnj where {anj, 1≤j≤kn ↑∞,n≥1 } is a real constantarray and {Xnj, 1≤j≤kn ,n≥1 } is a rowwise independent, zero mean, random element array in a real sep-arable Banach space of type p, we establish Lr convergence theorem and.a general weak law of large num-bers respectively, conversely, we characterize Banach spaces of type p in terms of convergence in r-thmean and probability for such weighted sums.     

五轴联动数控展成电解磨削整体叶轮的控制方法

分析了整体叶轮叶面片型精加工的现状，为解决整体叶轮叶面型面的精加工难题，进行了五轴联动数控展成电解磨削的基础研究，其中，控制导电磨轮相对整体叶轮叶片型面的展成运动是问题的关键，根据数控展成电争磨削整体叶轮叶片型面这一加工方法的特点，在分析了数控展成解磨床的结构与运动的基础上，介绍了经济型多轴数控系统及其联动控制方法，建立了电解磨削非平行直纹展成曲面的数学模型，开发了五轴联动数控展成电解磨削自动数控编程系统，对航空发动机整体叶片轮的叶片型进行了电解磨削。     

一种产生任意连续型分布伪随机数的方法

本文提出一种产生随机数的方法,该方法通过对随机数取值区间进行等概率划分,将概率密度转化为小区间宽度变化,并通过迭代式数值解法寻求区间的等概率划分,以解决大多数分布函数不能用显示表达的问题,最后讨论了算法并进行了实例研究。图3,表3,参2。     

露天矿外部排土场的模拟优化研究

以唐钢石人沟铁矿为背景，进行露天矿岩石排弃的模拟优化研究。采用动态模拟、线性规划、模糊数学等理论和方法，建立了外部排土场模拟模型、目标决策模型、流向流量优化模型。设计了相应的框图，编制了计算机软件，并结合矿山实际进行了模拟优化研究。     

永磁轴向多极场的获得

本文描述了永磁非对称轴向二极场的结构和形态,这种磁场用于替代同轴线圈提供微波ECR等离子体CVD系统所需的磁场;简要分析了磁场对等离子体特性的影响。     

New Parallel Interference Cancellation Scheme for DS／CDMA Systems

This paper proposes a new multi-stage parallel interference cancellation scheme by modifying the conventional multi-stage parallel interference canceller (PIC). At each stage, it first converts the interference-cancelled outputs from previous stage into the a prior information, in terms of which the bit mean values are computed and the multi-access interferenee (MAI) for each user is evaluated, and then an interferenee cancellation is performed to obtain further interference suppression. To reduce the implementation complexity, wegive an approximation expression for bit mean value. The performance over AWGN channel is analyzed and compared to the conventional PIC. The user number K= 7 and spreading factor N= 13 are chosen as simulation parameters. The computer simulation results show that the proposed PIC has better performance than the conventional PIC both with 2 interference cancellation (IC) stages, at bit error rate of 10^-3 , for example, about 3 dB performance gain is obtained by using the proposed PIC. It is also shown that our proposed PIC with 1-stage is superior to the conventional PIC with 2-stage in performance, which is of practical value because PIC with fewer stages can bring about shorter processing delay.