透视对应在变量图尺标值中的应用及精度分析

就如何利用透视对应原理对图算图的变量图尺标值进行了分析与讨论．指出运用射影刻度法对变量图尺标值是有条件的，并就其标值的数值精度进行了分析，提出了笔者的意见．     

测绘工程专业毕业实习与设计教学改革探索

提高学生工程实践应用能力是高等职业教育的主要培养目标。借鉴昆明冶金高等专科学校测绘工程技术专业实践教学改革取得的成效,从教学方式和教学手段等方面分析了当前毕业实习与毕业设计教学存在的弊端,对毕业实习与毕业设计教学形式和质量控制等方面进行了探索。     

Knowledge-Based Landslide Susceptibility Zonation System

The landslide susceptibility of a region is important for socioeconomic considerations and engineering applications. Thus, an automated system for mapping of landslide susceptibility could be of significant benefit for society. In this paper, a knowledge-based landslide susceptibility zonation (LSZ) system has been proposed. The system consists of input, understanding, expert, and output modules. The input module accepts thematic images of contributing factors for landslides. The understanding module interprets input images to extract relevant information as required by the expert module. The expert module consists of knowledge base and inference strategy to categorize a region into different landslide intensities. Finally the output module provides a LSZ map. It is a pixel-based system and provides output having the scale same as that of the input maps. The system has been tested to prepare a landslide susceptibility map for the Tehri-Garhwal region in India’s lower Himalayas, and further validated with studies for two other different regions. The proposed system provides output commensurate with that provided by experts. The categories of hazard zones have a discrepancy as little as 6.2% in high hazard zones and near to 1.5% and 4% in moderate and low hazard zones, respectively. The high hazard zones in the LSZ maps from the proposed system are supersets of that obtained by experts (i.e., the proposed system provides safer LSZ map). Thus, it can be concluded that the proposed system can be used for preparation of LSZ maps. In the future, the methodology may be extended for real time assessment and prediction of landslide hazards.     

100G传输系统中的关键技术及解决方案

在介绍100G WDM系统标准现状的基础上,从传输、调制、映射封装、接口等方面阐述了100G WDM系统的关键技术及解决方案,最后重点介绍了100G WDM系统的关键技术的解决方案。     

基于Borland ECO II的数据库开发

BorlandEnterpriseCoreObjectsII(ECOII)是一套模型驱动的开发框架。本文通过一个角度探索如何使用ECOII通过快速、简单的方法将关系数据库带入到微软.NET的对象世界进行处理和开发。     

流固耦合界面模型及其在水力机械动力学分析中的应用

为解决水力机械流固耦合计算中载荷传递的问题，提出了一种新的界面模型。该模型包括流场载荷输出、载荷转换和固体场载荷自动施加三部分。流场载荷输出算法通过输出控制仅输出耦合界面上的流场网格节点压力信息，这可以缩短下一步搜索时间并节省存储空间；载荷转换方法基于局部网格信息，对每个固体点考虑其相邻的流场三角形网格，采用邻近点加权平均法得到固体点的载荷，并将载荷转换的信息放在映射矩阵；固体场载荷自动施加算法根据固体网格节点排列顺序确定压力载荷施加表面，并生成压力载荷施加的命令流文件。最后将该模型应用于双吸离心泵叶轮的流固耦合特性分析中，结果显示载荷转换误差在1%以内，这表明该方法能够高效、高精度地处理不同网格体系间的载荷传递。     

行星齿轮传动测绘的几个问题

就工业上广泛使用的２Ｋ－Ｈ行星齿轮传动的齿轮测绘方法、关键参数及几何尺寸计算、齿轮材料和齿轮精度确定。以公式、表格给出较为系统、方便及实用的介绍。     

Tests of features of field-acceleration models for the extraordinary selective H Balmer α broadening in certain hydrogen-mixed plasmas

The results of the 656.3 nm Balmer α line measurements, recorded as a function of position in the cell, direction relative to the electric field, strength of the electric field, and pressure from He/H₂ (95/5%) as well as Ar/H₂ (95/5%) DC glow-discharge plasmas with needle electrodes support the conclusion that field-acceleration models (FAMs) are not valid to explain selective broadening in hydrogen-mixed plasmas. The reflector capabilities of the cathode that are necessary to explain the symmetrical profile in FAM were removed by using needle-like electrodes. The peak shape remained symmetrical. The role of the gas matrix as a reflector or divertor was tested by varying the gas pressure more than two orders of magnitude. The nondirectional, isotropic peak shape remained the same. The broadening was observed throughout the cell and was independent of angle with respect to the field; thus, it did not depend on the field strength. This was also confirmed by directly varying the applied voltage and observing no effect on the broadening. Nor, do FAM predict that selective, excessive H broadening was only observed for helium and argon mixed plasmas, but not for xenon. In contrast, a chemical reaction with energy release that produces broadening of H that is time dependent, nondirectional, position independent, selective to H, Gaussian Doppler, often two orders of magnitude in excess of the electron temperature, and specific to plasmas with atomic hydrogen and a catalyst (Ar⁺ and He⁺ in this study) including those formed chemically explains the data in total.     

机载激光测量技术在高压输电线路工程中应用

本文通过对机载激光测量技术的介绍,结合高压输电线路工程的特点,探讨了激光测量技术用于高压输电线路工程的作业流程和模式,并进行总结。     

铜缆用户接入网技术

铜线接入网宽带化技术是在现有普通电话线（铜线）上实现高速数据传输的一种新技术，利用这种新技术，可以通过铜线接入网将宽带信息送到客户。本文重点阐述高比特率数字用户环路（ＨＤ ＳＬ）采用的关键技术、工作原理和电路实现。