试论Java与木材加工业自动化控制和安全生产的关系

Java(Java也是美国加里福尼亚州Sun Microsystems公司的注册商标)正快速成为一种用于加工制造业和系统集成的计算机编程语言。相对于标准C和C^ 计算机语言而言，Java的多功能性和支持众多计算机操作系统和平台的显著特点，使它能在装备有不同计算机平台和控制系统的机械设备上使用提供了最大的方便性。从而提高了木材产品加工过程的安全性。本文就Java软件系统在木材加工和家具加工过程中的应用以及潜在问题进行探讨。     

一种基于Linux的嵌入式视频监控系统实现

嵌入式Web视频服务器采用S3C2410微处理器作为主控芯片,扩展了视频采集模块和无线网络模块,实现了视频数据的采集及无线发送功能.同时在该设备上构建了I/O多路复用Web服务器,采用CGI标准和Java applet技术,客户可以跨平台,安全方便地实现对现场的监控.     

基于JSP技术的机务段安全管理信息系统的设计

根据铁路提速带来的安全问题,笔者结合机务段安全管理,采用先进的JSP技术,设计了基于B/S(浏览器/服务器)模式的机务段安全管理信息系统。该系统运用计算机及网络技术,实现了安全管理信息资源的合理运转和共享,建立了一个安全信息管理、安全生产监督、事故预防的信息平台,为管理决策提供决策服务,同时辅助企业管理的科学化、现代化,提高了机务段经济效益和社会效益。介绍了课题的背景、系统结构与功能、JSP技术特点,然后具体说明了应用JSP技术实现系统的设计思路和方法,重点给出了系统的三级体系结构,数据库的设计与连接,系统的软件实现以及所达到的效果     

Land cover change and abrupt environmental impacts on Javan volcanoes, Indonesia: a long-term perspective on recent events

Based on a presentation of the spectacularly abrupt environmental and societal processes occurring on Java since the 1990s, and using that as an analogue to compare their consequences with the known environmental history of the island, we unravel the relative contributions of natural and human impacts in shaping the environment of Java. Our work is based on remote sensing, Geographical Information System analysis, field-based observations and measurements of responses to abrupt land cover changes in the last 10 years. Ecological disturbance has been endemic to the long-term history of Java, but montane forests on volcanoes have since ca. 1990 become the last frontier of colonisation and are for the first time rapidly receding. We reveal how human disturbance of natural ecosystems, today as in the past, tends to be the greatest where resistance is the least. This appears true within the regional setting of Southeast Asia, where Javan forests since the last glaciation have constituted a biogeographical ecotone with a limited natural ability to regenerate after some imbalance. It is equally true at the scale of single events where humans will turn a natural disturbance to their own advantage. Overall, it remains difficult to deconvolve the signals of spontaneous human impacts and of localised natural events such as volcanic activity, El Niño-related forest fires or longer climatic anomalies because humans are opportunistic in their attitudes to natural variability and so the two are often inextricably linked. The clearest impact on land cover and land degradation comes from the history of state-organised deforestation, whether colonial or indigenous, because its impact has been systematic, pervasive and regionally consistent. Javan environments have shown astonishing signs of resilience under the abrupt, cumulative impacts that have been inflicted over the last four centuries in successive iterations, possibly because the high-energy tropical and volcanic environment is a system in which sediment turnover is naturally rapid and where past scars of land degradation either heal rapidly or are soon destroyed by younger events. However, the volcanoes are the island’s keystone reservoirs of water, sediment and biodiversity and command the geomorphic metabolism of the lowlands. By removing forests from increasingly crowded mountain slopes, Javanese society is following a trajectory in which new nonlinear responses to environmental hazards and change may limit our capacity to anticipate and contain environmental risk to human life and property.     

江苏省地震科学数据共享平台技术研究

本文利用分布式数据库技术着力研究和开发了江苏省地震局的测震数据库、前兆数据库的共享、管理与集中发布技术。主要运用JSP（Java Server Page）技术及PHP（Hypertext Preprocessor）语言对测震的JOPENS系统中MySQL数据库、EQIM数据库、及前兆Oracle数据库等进行进一步地开发。搭建了一个行业内跨计算机操作平台的可视化的地震科技数据共享、交换及管理平台,实现了多种地震科学数据的（例如近、远震地震信息、各学科的运行率等）在线可视化、基于Google Map检索的地震信息服务等。     

Hydrocarbon and elemental carbon signatures in a tropical wetland: biogeochemical evidence of forest fire and vegetation changes

Evidence of changing vegetation in the tropical wetland (Rawa Danau, west Java, Indonesia) over the past 7428 years is illustrated by elemental (soot) carbon (EC) and n-alkane composition of sedimentary geolipids. In this study, vegetation changes and relevant controlling factors (e.g. forest fire and climate change) were documented on a decadal to centennial scale. The n-alkane composition that changes with depth might record changes in sources of organic matter (OM) in the wetland. The presence of EC (0.01–0.24% of organic carbon: OC) during late (0–1700 cal. year BP) and mid (3500–4500 cal. year BP) Holocene (at depths 0–50 cm, and 160–210 cm) indicated that large-scale forest fires severely affected the tropical vegetation. The hydrocarbon indices (CPI: carbon preference index, MCN: mean carbon number, and HVI: hydrocarbon vegetation index) significantly correlated with one another while a comparison of EC profile with the profiles of hydrocarbon indices indicated that n-alkane composition of the geolipid in lake sediment could record signatures of changes in catchment vegetation. Forest fire and vegetation changes might be related to regional climatic shifts relating to ENSO activity as well as being influenced by human influences.     

Java3D在基于Web技术的三维森林防火上的应用探讨

阐述了Java3D的三维网络特性,通过Java3D强大的网络功能和虚拟现实技术的有效结合,使三维现场信息在Web上实现更加可行、逼真.探讨了Java3D在基于Web技术下森林防火方面的应用,主要包括森林火灾虚拟场景的建模仿真、数据库的建立、林火蔓延动态仿真模拟等技术,为森林防火系统提供了技术参考.     

基于WebGIS的重大危险源实时监控系统的设计与实现

对重大危险源进行实时监控为避免重特大事故的发生具有重要意义,首先在研究ArcIMSJava Connector与Ajax开发WebGIS系统的关键技术的基础上,构建了ArcIMS Java Connector、Ajax技术和重大危险源业务逻辑集成的开发方案,设计并开发了重大危险源实时监控系统,并重点阐述了重大危险源实时信息发布功能的技术实现,最终完成了重大危险源实时查询、分析、监视、预警及相关辅助决策等功能,将该系统应用于实际取得了良好的运行效果。     

基于机器学习的浮标实时自动化赤潮预警研究

实现赤潮预警对于减轻海洋环境灾害、避免海洋产业特别是海洋渔业重大经济损失具有重要意义。针对当前水文监测数据海量却难以实现实时自动化监测与预警,特别是难以利用传统监测手段实现对危害更大的赤潮的精准实时预测这一显著问题,提出利用浮标数据作为依据,借助机器学习在大数据分析和智能决策方面的优势,建立一种新颖的双重递进式赤潮预警机制的方法。首先,通过相关算法分析历史数据,以确认赤潮初步预警阈值;其次,对叶绿素a、pH、溶解氧等重要监测指标的当前和阶段性变化进行初步分析,判断是否达到预警触发条件;然后,进一步联合分类、回归、聚类、神经网络等机器学习相关方法,对数据进行深度挖掘;最后,通过这种递进式的机制对短期内是否会发生赤潮作出判断,以实现赤潮自动化预警预报。在此基础上,利用宁波梅山湾实际监测数据,证实了该方法在赤潮实时自动化预警中的有效性。     

Marine gold and atoll livelihoods: The rise and fall of the bêche‐de‐mer trade on Ontong Java,Solomon Islands

The rise and fall of the bêche‐de‐mer trade in Solomon Islands is an example of how small, remote island communities are influenced by drivers of change on both the national and international scales. This susceptibility leads to local economic collapses and changed livelihoods. This article focuses on small‐island livelihoods, socio‐economic responses to fluctuating markets and the instability caused by internal and external forces of change. Quantitative surveys, qualitative interviews and participant observation have been used to explore the development trajectories of Ontong Java, a Polynesian outlier in Solomon Islands, in the context of the bêche‐de‐mer trade over the past forty years. The main findings can be captured in four distinct periods that demonstrate the transformation of this atoll community from subsistence‐oriented strategies to specialization in marine resource extraction to economic collapse and return to subsistence. It is concluded that this atoll population has shown a remarkable ability to adjust and cope with processes of globalization.