全站仪的使用与维护

阐述了全站仪的基本组成,介绍了在日常工作中全站仪的使用、保管、转运和全站仪电池充放电的注意事项。     

Tomography of Binomial States of the Radiation Field

The symplectic, optical, and photon-number tomographic symbols of binomial states of the radiation field are studied. Explicit relations for all tomograms of the binomial states are obtained. Two measures for nonclassical properties of these states are discussed.     

Construction of best Bregman approximations in reflexive Banach spaces

An iterative method is proposed to construct the Bregman projection of a point onto a countable intersection of closed convex sets in a reflexive Banach space.

     

Structural properties and tractability results for linear synteny

The syntenic distance between two species is the minimum number of fusions, fissions, and translocations required to transform one genome into the other. The linear syntenic distance, a restricted form of this model, has been shown to be close to the syntenic distance. Both models are computationally difficult to compute and have resisted efficient approximation algorithms with non-trivial performance guarantees. In this paper, we prove that many useful properties of syntenic distance carry over to linear syntenic distance. We also give a reduction from the general linear synteny problem to the question of whether a given instance can be solved using the maximum possible number of translocations. Our main contribution is an algorithm exactly computing linear syntenic distance in nested instances of the problem. This is the first polynomial time algorithm exactly solving linear synteny for a non-trivial class of instances. It is based on a novel connection between the syntenic distance and a scheduling problem that has been studied in the operations research literature.     

直接求线性规划可行基的一种方法

本文给出直接求线性规划问题基可行解的一种简易方法,该方法既避免了引入人工变量,减少存储,一般又能较快地得到一个较好的基可行解.     

对承压设备安全阀使用中几个问题的探讨

对承压设备安全阀使用中存在的几个问题进行了探讨,并提出相应的解决措施。     

浅谈矿山企业安全文化建设

介绍了安全文化和矿山企业安全文化的内涵,阐述了建设矿山企业安全文化的意义,提出了搞好矿山企业安全文化建设的途径。     

应急照明设计及其实际应用

介绍了应急照明的概念及其分类、应急照明的照度、应急照明的转换时间和持续工作时间、应急照明的电源、疏散照明与安全照明的设置以及娱乐场所应急照明的设计等内容。     

浅谈现代测绘工作者应具备的基本素质

从科学世界观、人生观、计算机应用能力、外语水平、法律意识、创新能力等方面阐述了现代测绘工作者应具备的基本素质。     

A strong law of large numbers for generalized random sets from the viewpoint of empirical processes

In this article we prove a strong law of large numbers for Borel measurable nonseparably valued random elements in the case of generalized random sets.