JAVA的数据库互联技术及实现

本文简要介绍了JAVA数据库互联(JDBC)技术,以一个实例程序讲解JDBC技术实现和 相关配置的操作步骤。     

Local use of agricultural lands and natural resources as the commons in Gunung Halimun National Park,West Java,Indonesia

The theory of the commons encompasses two interpretations: one based on 'manifest customs', whilst the other relates to 'latent customs'. The former asserts that individuals behave as rational economic units, pursuing their own profit based on economic mechanisms, whilst social restrictions relating to the use of resources within communities act to prevent the total destruction of the natural environment. In contrast, the latter holds that people behave according to the morality or ethics embedded within the society, and that this contributes to sustainable resource management.

A field survey conducted in West Java as part of the present study revealed that a system of communal ownership of lands and resources is widely practiced on land that is strictly private property, including paddy fields, cultivated swiddens, gardens and so forth, facilitated by the distribution of land, lending and borrowing of land and collaborative labour systems. This customary management system is considered a prime example of the commons resource management. Furthermore, communal lands were also seen to play a significant role in the distribution of land and resources amongst community members to supplement daily needs. In addition, these customary land-use systems, as the commons, are considered to contribute towards mitigating the gap between rich and poor.     

基于JAVA技术的易燃易爆毒性云团扩散软件的开发与应用

针对易燃易爆及有毒有害物质在生产、储存和运输过程中经常发生泄漏事故所造成的严重后果,进行该类事故的模拟和仿真研究;通过对几种气云扩散数学模型进行分析,利用JAVA技术开发出高斯模型、BOX模型、LTA-HGDM模型扩散模拟软件,该软件具有良好的环境兼容性,通过输入相应的参数即可方便快速地进行后果模拟;通过实例进行软件应用,其结果可以为政府规划和为企业事故发生后采取相应的应急措施提供依据。     

On the Use of MRF/AVN Global Information to Improve the Operational Air Quality Model OPANA

Operational air quality models have become an important tool to assist the decision makers in European Environmental Offices at different levels: cities, regional and state. Because of the important advance on computing capabilities during the last few years the possibility of incorporating the complex research and academic mesoscale air quality models under routine operational basis has become a reality. OPANA model is the operational version of the research model ANA (Atmospheric mesoscale Numerical pollution model for regional and urban Areas). This model is a limited area model (mesoscale beta) and the capability to extend the prediction horizon is limited unless proper boundary conditions are provided during long simulations. In this contribution we show how AVN/MRF (NOAA) vertical numerical meteorological soundings are incorporated to the OPANA system by using JAVA technology. This new feature helps to keep the air quality model into medium power workstations and the performance is improved accordingly. This technology avoids running mesoscale models over larger areas (continental scale) to accordingly increase the forecasting temporal horizon.     

JAVA解决环境监测中的数字修约问题

在环境监测中经常要对监测的数据进行计算并进行数字修约和数理统计,通常用手工或计算器计算会很繁琐且很难实现枇量数据的计算从而影响监测分析的效率,同时计算机本身的“四舍五入”设置原则也不能达到分析数据的要求,进而影响最后的分析结果。因此,可以借用JAVA简洁、面向对象、安全、健壮等优点,并按照“四舍六入五单双”的修约规则来编写程序对数据进行自动修约,从而实现对监测数据及时处理和分析,借此大大地提高了监测工作效率的目的。