城市发展中的门槛分析法及工程选址方案的F-G局势决策

城市规划与城市发展决策有着丰富的经济内涵。只有把规划工作与经济学有机地联系起来,规划与决策才能真正地有效地影响和驾驭城市发展过程。门槛理论在规划领域中的应用已经形成一种专门的方法——门槛分析法,该方法把规划与经济紧密联系起来。城市工业和市政建设中,工程建设选址可能有许多方案,但综合地考虑各方面的因素影响,可以优选出最优方案。本文中,首先介绍城市发展中的门槛分析法,并在此基础上,对工程建设选址方案采用Fuzzy-Grey局势决策选优,图形及数据处理在微机上进行。     

Responses of the green-lipped mussel Perna viridis (L.) to suspended solids

Laboratory experiments were conducted to investigate the lethal and sublethal effects of suspended solids on the survival and physiological, behavourial and morphological changes of the green-lipped mussel Perna viridis collected from Tolo Harbour, Hong Kong. Results showed that P. viridis survived in all test conditions of suspended solids from 0 to 1200 mg/l over a period of 96 h. Physiological responses of the green-lipped mussel under 14-d exposure of suspended solids from 0 to 600 mg/l, followed by 14-d recovery in natural seawater, revealed no significant changes (p>0.05) in oxygen consumption and dry gonosomatic index for treatments in different concentrations of suspended solids and exposure time. Changes in clearance rate were only found to be significant (p<0.001) with exposure time. Responses in behavourial and morphological changes of the green-lipped mussel were also studied under similar experimental treatments and exposure time. Byssus production was significantly (p<0.001) related to exposure time. Gill damage, however, was significantly greater in treatments (p<0.001). Present findings suggested that P. viridis could tolerate a high level of suspended solids in the laboratory. There were dose-dependent effects of suspended solids on morphology of gill filaments. Implications of survival and responses of the green-lipped mussel to suspended solids in the marine environment are discussed.     

从数字深圳看三维城市模型数据生产流程及技术

分析了在数字深圳工程中三维城市模型数据的生产流程及技术，从三维地物模型航测数据的采集开始，至最后工作区的合并与数据的提交，说明了数字城市雏形的建设过程。     

论飑线动力学

1 引言由于后面带有中尺度层状云区的飑线系统往往产生大量降水,所以多年来人们已经认识到并日益增进了对这类飑线系统的重视。通常人们把在某一阶段既有层状云区又包含有对流中心的对流天气系统称为中尺度对流系统(MCS)。近来的观测结果(譬如:     

Micro—station软件包的应用

Ｍｉｃｒｏ—ｓｔａｔｉｏｎ软件包的应用徐肇忠，石亮（武汉测绘科技大学１１３００７０）１．Ｍｉｃｒｏ—ｓｔａｔｉｏｎ软件包简介Ｍｉｃｒｏ—ｓｔａｔｉｏｎ，ＰＣ是美国ＩＮＴＥＲＧＲＡＰＨ公司研制的一种图形软件包，该软件包与ＶＡＸ－ｂａｓｅｄＩｎｔｅｒｇｒ...     

数理统计方法在制图作业中的应用

本文分析了数理统计方法在制图应用中不能推广的原因，举例说明该方法在研究制图物体实地分布规律中的作用，并对如何改进数理统计在制图中的应用提出了设想。