贵州水资源的特点及其可持续发展战略探讨

面对21世纪水资源的严峻挑战,本文结合我国西部大开发实际,论述了贵州水资源的特点、现状及其存在的问题,提出了贵州水资源可持续发展的战略。     

培养料和温度对茶薪菇生长发育的影响

在实验室内，以PDA为培养基接种茶薪菇，置于梯度为5℃、10℃、15℃、18℃、20℃、25℃、28℃、30℃、32℃、33℃、35℃、36℃的恒温箱中，培养观察茶薪菇菌丝生长。用配方I：棉籽壳77％、麦麸20％、石膏粉2％、蔗糖1％；配方Ⅱ：茶支屑77％、麦麸20％、石膏粉2％、蔗糖1％；配方Ⅲ（对照）：阔叶树木屑77％、麦麸20％、石膏粉2％、蔗糖1％，作为培养料接种茶薪菇，培养观察茶薪菇的菌丝生长和产量。以配方I为培养料，含水量设55％、60％、65％和70％，菌丝生长熟后置于温度为15℃、18℃、20℃、24℃、26℃培养室内培养，分别观察含水量和室内温度对子实体的影响。结果表明，茶薪菇菌丝生长比较适合的温度为18－28℃，子实体发育较适温度为18－24℃，培养料含水量以65％较好，配方I和配方Ⅱ适合茶薪菇生长，产量也较高，生物学效率达73．5％和65．6％。     

广西水利政策法规保障体系支持系统建设探讨

为规范广西水利行政管理工作，实现广西水利行业内部信息上传下达无纸化，设想创建广西水利政策法规保障体系支持系统。系统以数据库服务器为核心，采用Internet共享服务技术，建立一个网络办公信息处理平台，通过该平台实施水行政依法管理的办公自动化和信息共享。     

CSCW在远程医疗会诊中的应用

讨论了计算机支持的协同工作 (CSCW )的特点和结构 ,结合实际工作需要 ,设计了一个运用CSCW技术进行远程医疗会诊的方案 .分别给出了客户端和服务器端的实现模块 ,采用该方案的专家会诊系统可为患者提供高效、安全的服务     

Change of water use efficiency and its relation with root system growth in wheat evolution

Raising crop water use efficiency (WUE) is the physiological basis to implement crop high efficiently using water. The present soil column and field experiments are designed to investigate the change of wheat WUE (Triticum aestivum L.) at whole plant level and root system growth in evolution and the relationship between WUE and its root system growth using 10 wheat evolution genotypes with different ploidy chromosomes sets. Results show that in wheat evolution from 2n→6n, WUE at whole plant level increases with the increase of ploidy chromosomes, and root system growth (root weight, root length) and root/shoot ratio of wheat decrease with the increase of ploidy chromosomes under dry and irrigated conditions. WUE is negatively correlated with root weight and root/shoot ratio of wheat in evolution, significantly. Root system growth has an adverse redundancy for WUE in wheat evolution, and the root redundancy reduces with the increase of ploidy chromosomes, which result in the increase of wheat WUE at whole plant level.     

Simulation and evaluation of the quality and availability of typical GLI ocean image

ADEOS-II satellite will be launched in the near future. It collocates many remote sensing instruments in the same platform. Among them, Global Image (GLI) is considered to be a main sensor which will play a key role. In order to understand the characteristics of future GLI ocean color images, a simulation and evaluation of the quality and availability of GLI typical ocean image has been done. In the paper, we first introduce the simulation models briefly, and simulate typical cases of radiance images at visible channels, in which the radiance distribution is based on geographic location, the satellite orbital parameters and sensor properties. A method, complex signal noise ratio (CSNR) to evaluate the image quality and availability, is developed according to the characteristics of image. Meanwhile, a series of CSNR images are generated from the simulated radiance components for different cases, which can be used to evaluate the quality and availability of GLI images before the ADEOS-II is placed in orbit. Finally, the quality and availability of GLI images are quantitatively analyzed by the simulated CSNR data. The results will be beneficial to the people who are in charge of GLI mission or plan to use the data from GLI.     

Temporal-spatial characteristics of vegetation cover and desertification of China by using remote sensing data

Based on the NOAA advanced very high resolution radiometer (NOAA-AVHRR) remote sensing data of 1982 — 1999. the normalized difference vegetation index (NDVI) reflecting the surface vegetation cover has been obtained. Using the empirical orthogonal function analysis, the temporal-spatial eigenvectors of NDVI are given, and the characteristics of the spatial distribution of vegetation cover and its temporal variation together with the desertification of China are analyzed. It is found that the surface vegetation cover has seriously deteriorated in most part of China since 1995. along with the intensified desertification. All these are mainly caused by human activities although the climate change is responsible for the damage of surface vegetation cover to some extent.     

Preliminary study on land surface characteristics over Huaihe River Basin

The analysis of the flux observation dada from the Huaihe River Basin Experiment (HUBEX) shows that, in semi-humid monsoon regions, latent heat flux is as important as sensible heat flux in most situations. Moreover, it can even dominate the sensible heat flux in cropland and paddy field. This is distinct from that for arid and semi-arid regions where the sensible heat flux is dominant. Under clear sky conditions, the soil temperatures in different vertical layers all exhibit certain diurnal variations, and the magnitude decreases with depth to less than 1°C at a depth of 60 cm. This depth is considered as the transition layer for the soil moisture variation. On the other hand, the vertical profile of soil water content varies with the soil texture and even weather conditions, and the layer with maximum soil water content can also be found in Jiangji station during June 1998.     

Influence of Reaction Parameters on Water Absorbency of Starch Grafted Superabsorbents

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飞来峡水利枢纽防洪调度对佛山市水情预报的影响

通过分析佛山市防洪的水文特征，提出了飞来峡水利枢纽建成后，因放闸流量的不可预见期，将对西、北江中下游佛山市的水情预报造成影响。