Development and evaluation of a cloud-gap-filled MODIS daily snow-cover product

The utility of the Moderate Resolution Imaging Spectroradiometer (MODIS) snow-cover products is limited by cloud cover which causes gaps in the daily snow-cover map products. We describe a cloud-gap-filled (CGF) daily snow-cover map using a simple algorithm to track cloud persistence, to account for the uncertainty created by the age of the snow observation. Developed from the 0.05° resolution climate-modeling grid daily snow-cover product, MOD10C1, each grid cell of the CGF map provides a cloud-persistence count (CPC) that tells whether the current or a prior day was used to make the snow decision. Percentage of grid cells “observable” is shown to increase dramatically when prior days are considered. The effectiveness of the CGF product is evaluated by conducting a suite of data assimilation experiments using the community Noah land surface model in the NASA Land Information System (LIS) framework. The Noah model forecasts of snow conditions, such as snow-water equivalent (SWE), are updated based on the observations of snow cover which are obtained either from the MOD10C1 standard product or the new CGF product. The assimilation integrations using the CGF maps provide domain-averaged bias improvement of ~11%, whereas such improvement using the standard MOD10C1 maps is ~3%. These improvements suggest that the Noah model underestimates SWE and snow depth fields, and that the assimilation integrations contribute to correcting this systematic error. We conclude that the gap-filling strategy is an effective approach for increasing cloud-free observations of snow cover.     

基于GIS的土地信息系统的设计与实现

土地信息系统是面向土地管理的地理信息系统,是由土地相关信息组成的数据库以及收集、描述、处理和分配这些数据的技术方法组成.文中介绍了一个土地信息系统的组成,并着重讨论了系统的技术要点及实现方法.     

Connectivity Infrastructure and Components for POCT Environments - Overall Infrastructure

Connectivity infrastructure, hardware and software components for point-of-care testing (POCT) environments at medium-to-large sized hospitals with expected number of POCT instruments in the order of hundreds or thousands are described. The instruments include both network-ready and non-network-ready devices. The latter are connected to the network by means of a hardware-based Instrument Network Adapter. Instrument messages are converted to standardized form and, depending on message content, are routed and delivered to appropriate destinations by a software-based Message Routing System consisting of a Message Router and a Delivery Agent. Target information systems consist of departmental and central information systems.     

仓库管理系统的再造

通过对现有仓库管理系统（WMS，Warehouse Management System）的运行状况、运行效率不尽人意的地方的深入思考，对现有WMS的体系架构、功能模块、数据流程进行研究，提出了针对体系架构、功能模块、数据流程以及实施过程中的技术改进方案，使WMS系统更加容易适应现代企业运营的需要，帮助企业提升竞争力。     

Using GIS for Economic Development in Yunnan Province,China

１ＩｎｔｒｏｄｕｃｔｉｏｎＡｌｏｎｇｗｉｔｈｔｈｅｅｓｔａｂｌｉｓｈｍｅｎｔｏｆｍａｒｋｅｔｅｃｏｎｏｍｙａｎｄｔｈｅｄｅｖｏｌｕｔｉｏｎｏｆｇｏｖｅｒｎｍｅｎｔｓ，ｎｅｗｃｈａｌｅｎｇｅｓａｎｄｏｐｐｏｒｔｕｎｉｔｉｅｓｔｏａｐｐｌｙＧＩＳｉｎｅｃ...     

基于整数小波的信源信道联合编码技术研究

提出了一套基于整数小波高频零树的信源／信道联合编码方案,该方案能快速编出具有嵌入渐进式传输功能的低码率码流。其基本原理是根据预先设定的一组阈值依次扫描信源,并得到相应系数的位置信息和值信息,然后分别进行编码和传输。该码流既能在无噪信道下进行无失真渐进传输,也能在有噪信道下进行低码率较为可靠的有失真嵌入式渐进传输。论文的实验结果可以看出,该方案在有噪信道下不仪能够在较高的压缩比下得到较高的峰值信噪比,而且能够在变化的噪声环境中使得信源更稳健更可靠地低码率传输。     

HIS和LIS的ADR自动监测系统的设计与实现

通过对药品不良反应(ADR)的研究,以最为常见的药品肝肾损害为例,设计并实现了一个自动监测软件系统.该系统采集医院信息系统(HIS)和检验信息系统(LIS)的数据,通过数据融合分析,实现了药品肝肾损害自动监测的功能,能帮助医生发现、判断、收集和上报临床发现的ADR,建立医院ADR数据库,并且对新ADR因果关系的预测有一定的参考意义.     

UML技术在医院检验信息管理系统设计中的应用

目的:针对医院对检验信息管理系统的开发质量要求,研制解决方案,避免后期投入成本巨大浪费问题,实现因地制宜地保证系统上线。方法:采用标准的UML方法,编制了适合医院的检验管理信息系统,并完成了详细描述了其具体用例图(Use Case)、顺序图(Sequence Diagram)、类图(Class Diagram)。结果:设备的开机率提高了20%,标本控制时间明显缩短,故障响应时间为1分钟,在系统中及时报警提示。结论:完成了基于UML的LIS系统的设计,提高了设备的工作效能,收到了良好的效果。     

地籍信息系统图形数据建库及其精度问题研究

论述了建立地籍信息系统（Cadastral Information System简称CIS) 过程中的图形（空间）数据建库等问题,并对空间数据的精度及其质量评定模型进行了讨论,从精度和数据共享的角度概括了数据采集和在CIS中建立空间数据库的一些方法。另外还简要描述了基于空间数据库和地理信息系统（GIS）平台的CIS的结构;为了详细说明GIS和空间数据库的关系,本文给出了一个典型的CIS的例子,并进行了说明。     

生物信息挖掘中LIS算法研究*

探讨了生物信息挖掘中ó模式子序列问题的一个特例,即最长递增子序列(LIS)问题。对于LIS问题,分别用LCS算法、动态规划、动态规划结合二分法进行求解,并分析了这三种算法的时间和空间复杂度,对其中两种算法进行了实现,验证了时间和空间复杂性理论分析的正确性,最后得出了一种高效的LIS算法。