基于虚拟仪器技术的自动气象站数据采集与处理系统

在XYZ06型地面遥测气象仪的基础上,基于虚拟仪器技术研制了一套气象要素自动采集与处理系统,替代了该气象仪的数据采集器和数据预处理器的功能,可进行温度、湿度的采集、处理、显示、保存和发送.插入该气象仪终端计算机的数据采集卡ACL-8216能与气象仪的观测业务软件通讯,通讯命令字及其意义可实时显示于屏幕上.该虚拟气象数据采集器可方便地应用于自动气象站的教学实践,并可大大降低实验的设备费用.     

An analysis on movement patterns between zones using smart card data in subway networks

Identifying zones and movement patterns of people is crucial to understanding adjacent regions and the relationship in urban areas. Most previous studies addressed zones or movement patterns separately without analysing simultaneously the two issues. In this article, we propose an integrated approach to discover directly both zones and movement patterns among the zones, referred to as movement patterns between zones (MZPs), from historical boarding behaviours of passengers in subway networks by using an agglomerative clustering method. In addition, evaluation measures of MZPs are suggested in terms of coverage and accuracy. The effectiveness of the proposed approach is finally demonstrated through a real-world data set obtained from smart cards on a subway network in Seoul, Korea.     

存储式磁阻多点连续测斜仪的研制

存储式磁阻多点连续测斜仪主要解决了在钻孔测斜技术的电缆传输中，电缆笨重、易损坏、易受电磁干扰、信号传输远等问题，并以存储卡的方式解决了数据传输记录的问题。     

开发惠普掌上计算机应用程序

同一般的个人计算机很相似，开发惠普掌上计算机应用程序是很容易的，但在它们之间仍然存在一些差别需要注意。     

综合物探方法在青岛地区地下水源勘查中的应用

作者应用联合剖面、电测深和静电α卡测量等综合物探方法在青岛地区进行地下水源勘查。本文列举了三个不同地质条件地下水源点的探测过程,说明青岛地区地下水源开发利用是有前景的。指出对当地水文地质资料进行深入研究,采用综合物探方法与地质钻探相配合是勘测地下水源行之有效的一套工作方法。此外对物探工作方法技术的合理选择进行了论述。物探资料的推断解释已通过钻探结果所验证。     

SARS空间传播模式及其在疫情监控信息系统设计中的应用

在中国控制SARS(Severe Acute Respiratory Syndrome)疫情扩散与蔓延的大量科学实践活动基础上，从人地系统科学的理论和观点出发，提出了各种致病因子在人地互动过程中转移路径的逻辑模型，进而又提出了控制SARS疫情发展的人地互动逻辑模型。从后一个模型出发，把中国SARS疫情的发展规律归纳为5种传播模式，即异类病毒转移传播模式、家庭和社区接触传播模式、医院和门诊感染传播模式、市内随机扩散传播模式和飞点跳跃跨区传播模式。其中，跨区传播模式的影响最广泛、危害最巨大、控制起来最艰巨、复     

ISDN多媒体卡拨号上网的研究与设计

研究在已实现可视通信的ISDN多媒体卡上,通过芯片的功能复用,设计一个驱动程序模型,以实现ISDN多媒体卡的拨号上网功能。简要介绍了ISDN接入因特网的通信协议体系,详细探讨了ISDND信道的呼叫过程,分析了拨号上网原理及如何与Windows系统的远程访问服务结构相结合。给出了一个基于NDIS标准的ISDN多媒体卡的小端口驱动程序的设计与实现方案。     

Detecting the dynamics of urban structure through spatial network analysis

Urban spatial structure in large cities is becoming ever more complex as populations grow in size, engage in more travel, and have increasing amounts of disposable income that enable them to live more diverse lifestyles. These trends have prominent and visible effects on urban activity, and cities are becoming more polycentric in their structure as new clusters and hotspots emerge and coalesce in a wider sea of urban development. Here, we apply recent methods in network science and their generalization to spatial analysis to identify the spatial structure of city hubs, centers, and borders, which are essential elements in understanding urban interactions. We use a ‘big’ data set for Singapore from the automatic smart card fare collection system, which is available for sample periods in 2010, 2011, and 2012 to show how the changing roles and influences of local areas in the overall spatial structure of urban movement can be efficiently monitored from daily transportation.

In essence, we first construct a weighted directed graph from these travel records. Each node in the graph denotes an urban area, edges denote the possibility of travel between any two areas, and the weight of edges denotes the volume of travel, which is the number of trips made. We then make use of (a) the graph properties to obtain an overall view of travel demand, (b) graph centralities for detecting urban centers and hubs, and (c) graph community structures for uncovering socioeconomic clusters defined as neighborhoods and their borders. Finally, results of this network analysis are projected back onto geographical space to reveal the spatial structure of urban movements. The revealed community structure shows a clear subdivision into different areas that separate the population’s activity space into smaller neighborhoods. The generated borders are different from existing administrative ones. By comparing the results from 3 years of data, we find that Singapore, even from such a short time series, is developing rapidly towards a polycentric urban form, where new subcenters and communities are emerging largely in line with the city’s master plan.

To summarize, our approach yields important insights into urban phenomena generated by human movements. It represents a quantitative approach to urban analysis, which explicitly identifies ongoing urban transformations.     

闪速存储卡与地面气象要素的存储

气象要素的获取与存储是气象工作的重要组成部分,文中在讨论这一问题的基础上,对组成系统的器件选择特别是闪速存储卡的特点与应用进行了说明,并给出了一个地面气象要素获取系统的设计方案。     

煤层气井有杆泵排水采气设备示功图

煤层气井示功图直观表现了悬点载荷的变化规律,可为有杆泵设备设计计算提供重要依据。基于有杆排采设备的运动学和动力学分析,建立了计算悬点各载荷的数学模型,给出煤层气井不同开采过程的静力和动力示功图。实例分析结果表明,静力示功图接近于稳定生产后的示功图,代表了悬点载荷变化的基本规律,是分析实际示功图的基础;动力示功图在考虑动载荷的影响后,呈现出波动和偏斜的形状,考虑摩擦力的作用后,示功图的上缘向上平移,下缘则下移。煤层气井动载荷和摩擦力所占的比例分别达到15%和5%,这就加大了悬点载荷的变化幅度与不平衡性。随冲次的降低,示功图的下缘远离零线,上缘则逐渐远离下缘,而且惯性载荷和振动载荷影响的减小,使得上下缘的倾斜度逐渐降低,波动幅度不断变小。煤层气井杆管总变形量较小,与冲程的比值仅为10%左右,且随冲次的降低,总变形量和静变形量逐渐增大,而动变形量不断变小。