一种新型的半导体激光能动干涉仪

本论文提出了一种新型的半导体激光能动干涉仪,对它的工作原理进行了阐述.这种干涉仪的特点是具有非常强的抗外界干扰能力,即使不使用防振台在机械性噪音较严重的普通环境情况下,也能正常观测干涉图样.论文还给出了实验测试结果.     

宽带噪声中未知频率窄带信号的提取

提出一种从宽带噪声中提取未知频率窄带信号的方案，该方案采用单滤波器与数字式频率扫描锁定系统相结合。经混频后，与低速模拟─数字转换器，与ＦＦＴ配合，可对高频信号实现细化的谱分析。应用此系统可提取０～２６ＭＨｚ内任一未知单频信号，并且改善信噪比约１８ｄＢ。文中还给出了系统框图和实际测试结果。     

Application of wavelets to the pre-processing of underwater sounds

In this paper we consider data on underwater sounds of differing types. Our objective is to filter background noise and achieve an acceptable level of reduction in the raw data, whilst at the same time maintaining the main features of the original signal. In particular, we consider data compression through the use of wavelet analysis followed by a thresholding of small coefficients in the resulting multiresolution decomposition. Various methods to threshold the wavelet representation are discussed and compared using recordings of dolphin sounds. An empirical modification to one of them is also proposed which shows promise in better preserving certain structures in our particular sound data.     

数字地图中三维柱状图的一种新消隐法

本文介绍了数字地图的基础上，实现地域三维柱状显示的原理和方法，文中详述了消隐方法的选择，地域平面多边形数据结构的建立以及多边形分解和图形的拓扑排序，对数字地图矢量化的组织和处理数据作了尝试，为地学领域显示三维图形提供了一种新的手段。     

广州：城市博物馆的呼唤

城市博物馆是一座城市的文化之根,历史的记忆与良知,更是未来的基石。凝聚一个国家或民族,需要的是文化的认同以及对未来之保证。博物馆也是这样的认同与保证。打造好它们,需要几代乃至几十代人的精心荟萃。     

新型便携式三维粗糙度测量仪

在传统二维粗糙度测量仪的基础上,结合三维表面形貌检测的发展趋势,开发设计了一种便携式三维粗糙度测量仪。它可以实现y轴的精确扫描,准确、迅速定位零件至测量位置,使用调节方便。能够对平面、回转面等实现三维粗糙度测量与评价。该仪器体积小、携带方便,实用性强。     

常用几种排序的评价与分析

先给出多种排序算法及相关的C语言实现方法.然后对各种算法进行比较、分析,从不同的方面给出相关的评价.     

Pricing and Logistics Decisions for a Private‐Sector Provider in the Cash Supply Chain

We study a problem faced by a secure‐logistics provider (SLP) of maximizing profit by jointly pricing the services of fit‐sorting and transporting cash along with the design of the supporting logistics network, in a market consisting of a population of Depository Institutions (DIs). The need to jointly price the services assumes significance because they are partial substitutes of one another. Our study finds that the influence of the logistics network on prices is especially strong when there are non‐linearities in the cost of provisioning the logistics services. Furthermore, the impact of logistics decisions on different types of pricing schemes (e.g., volume discount, bundled pricing) is different, both in its structure and extent. In present times, when the market for the fit‐sorting service is relatively immature, our findings have major implications to the way an SLP's business is managed.     

非对称信息条件下政府购买公共服务问题研究

政府购买公共服务是提高公共资金使用效率的有效手段。非对称信息的存在成为政府择优选择私人承包商的主要障碍。单一信号博弈模型无法解决逆向选择问题,通过增加付款方式信号,构建双重信号博弈模型,为职能部门有效选择承包商提供了解决思路。     

黄焯整理黄侃遗稿述略

黄侃是中国近现代史上著名的国学大师,他拥有传奇的经历和复杂的性格,他坚持五十之前不著书,却未满五十岁即仙逝,因此生前出版著述极少。黄侃之侄黄焯,以一片孝敬之心,整个晚年致力于整理黄侃遗稿的事业,为黄侃学术研究做出了杰出的贡献。