如何将DOMINO邮件数据库移动到另外一个分区

随着用户的增多,MOMINO邮件服务器上的硬盘空间越来越少,如果不增加硬盘空间,将会严重影响到系统的运行,甚至死机。一个解决方案是:为服务器新增一个大硬盘,将数据库文件移到新硬盘上。如何以最小的代价、最快的速度、尽量不影响用户的正常使用来完成此项工作呢?通过查询相关资     

Netware网络与UNIX主机联网方案探讨

1前言各地区9210工程开通后,从卫星接受的资料放在UNIX主机上,运行在Win－dows95计算机上的Micaps通过NFS方式共享该资料。而Netware网络的DOS工作站以及运行Onlan／PC的远程终端只能访问Netware服务器上的资料,这样必须将U－NIX主机上的数据拷贝至Netware服务器上,浪费了硬盘空间。根据UNIX主机可以通过TCP／IP协议按NFS方式输出其目录供其它NFS客户访问的性能。本文作者设计了如下的解决方案：为网络上的所有工作站安装TCP／IP协议、NFS客户软件,为Netware服务器安装TCP／IP协议、NFS服务器软件,使所有工作站…     

基于负载均衡的数据库集群对气象数据的共享服务

甘肃省国家自动气象站、区域自动气象站实时气象数据的共享服务由单一数据库服务器承担,在汛期用户访问频繁时,经常因为查询量过大,造成数据库表无法正常访问、数据无法入库,给用户带来不便,也为数据库维护带来负担。针对此类情况,本文采用将数据实时同步到多台数据库服务器中,通过负载均衡设备,将多台数据库服务器组建为数据库集群,实现用户对数据库集群的负载均衡访问,从而达到对用户的访问分流至数据库集群的节点服务器上,减缓对单一数据库服务器的访问压力,保障汛期实时气象数据的实效性及稳定性。     

气象电报安全监管系统的应用

气象电报在上传北京气象中心的过程中,经省级网络中心服务器接收到报文后,自动生成带有发报站发送上行报时间、站号、报类、时次等信息的文件.该文件存放在IBM主机上,是确认发报成功的唯一依据.台站用FTP客户端软件上传电报到省气象网络中心后,时常会出现报文不明、丢失等收不到回执.其主要原因是省气象网络中心的收报服务器上的报文存放目录给发报用户较高的权限,用户登录到该服务器之后,可以人为对报文文件进行更名或删除.因此,上传报文的安全得不到根本保障.     

基于指纹识别的室内定位中的隐私保护

基于指纹识别的定位是最流行的室内定位方法.在离线阶段,服务器测量指纹,比如来自特定空间已知位置的不同接入点（AP）的接收信号强度（RSS）,测量后服务器将测量结果保存在数据库中;在线上阶段,用户同时向服务器发送他当前指纹的测量结果以及位置查询请求,服务器将在数据库中查找与测量结果最接近的指纹.虽然这种方法已经被研究了很久,但现有的工作并没有考虑2个隐私要求：供应商希望保护他们花大代价收集的指纹,用户想要对服务器保留他们的指纹测量结果,以避免泄漏位置.为了实现隐私保护,本文提出一种使用加密技术的指纹匹配方案,这个方案在加密情况下计算由用户测量的指纹与服务器存储的指纹的距离,服务器存储的指纹在这一过程中仍处于密文空间.本文证明了这个方案在进行单点定位时能够很好地保证两者的隐私要求.为了减少高昂的时间开销,本文还提出了一个基于网格划分的改进方案,以及以有限的隐私损失为代价的扩展方案.为加强安全性,最后提出了有效对抗特定攻击的对策,在这种攻击中恶意用户可以通过重复定位获得服务器存储的指纹.使用公众 RSS指纹数据集的扩展实验结果显示本文方案足以在实现实时定位的同时保留定位精度.     

地市级 Lotus Notes电子邮件系统安装及使用

全省气象部门行政机关电子邮件系统是依托中国气象局现有的VSAT信息网络系统,构建一个覆盖全国气象部门安全可靠、稳定高效的信息传输软件平台。这里着重介绍地市级Notes工作站的安装及使用,为广大工作人员提供参考。1Notes工作站的安装服务器设在黑龙江省气象局,地市级为客户端。初装工作一般由黑龙江省气象局统一完成,在此介绍地市级自行安装方法。1.1准备工作(1)安装网卡和网卡驱动程序,将计算机连接到网络上,安装TCP/IP协议。(2)得到用户标识符文件(用户名.id)和用户登录口令。(3)知道Domino服务器名称和IP地址(Domino服务器名称…     

浅谈文件服务器的构建

介绍了文件服务器应具备的功能、硬件要求和实现这些功能的具体设置。利用Win-dows2003 Server内置的文件服务器角色,通过创建用户和组,对共享文件夹设置用户访问权限,使无关人员无法访问相关文件;设置审核,实现了对每个用户访问文件夹操作的跟踪,做到有迹可寻;设置磁盘配额,给用户分配固定的磁盘容量,防止文件服务器磁盘空间爆满,从而提高了文件管理上的安全性。同时还对文件服务器的日常管理维护提供了一些建议。     

车联网云环境下多服务器架构的匿名认证及密钥协商协议

随着车载自组织网（Vehicular Ad-hoc Networks,VANETs）和云计算的发展,越来越多面向车联网用户的移动应用服务应运而生.这些应用服务往往由不同的服务器提供,车辆要从这些服务器获得服务,则必须向不同的服务器提供注册信息.为了实现车辆在多个服务器上的高效认证,本文提出一个车联网云环境下（Vehicular Cloud Computing,VCC）面向多服务器架构的匿名认证协议,协议实现了车辆与服务器的双向认证,并能够保护车辆隐私.     

利用普通宽带上网实现县站气象终端服务初探

利用普通宽带上网，通过设置动态服务器，在Internet上开展气象终端服务。这样既解决了上Internet网搞气象服务经费高的问题，又能解决拨号服务器通信速度低，服务用户不太满意的矛盾。为县站气象服务领域的发展提供广阔的前景。     

FTP服务器的建立及客户端的使用

利用FTP文件传输协议,使用Serv-U软件构建FTP服务器,使客户端用户能够通过互联网访问FTP服务器,进行信息资源的共享和传输.     

Strategies to adapt to an uncertain climate change

Many decisions concerning long-lived investments already need to take into account climate change. But doing so is not easy for at least two reasons. First, due to the rate of climate change, new infrastructure will have to be able to cope with a large range of changing climate conditions, which will make design more difficult and construction more expensive. Second, uncertainty in future climate makes it impossible to directly use the output of a single climate model as an input for infrastructure design, and there are good reasons to think that the needed climate information will not be available soon. Instead of optimizing based on the climate conditions projected by models, therefore, future infrastructure should be made more robust to possible changes in climate conditions. This aim implies that users of climate information must also change their practices and decision-making frameworks, for instance by adapting the uncertainty-management methods they currently apply to exchange rates or R&D outcomes. Five methods are examined: (i) selecting “no-regret” strategies that yield benefits even in absence of climate change; (ii) favouring reversible and flexible options; (iii) buying “safety margins” in new investments; (iv) promoting soft adaptation strategies, including long-term prospective; and (v) reducing decision time horizons. Moreover, it is essential to consider both negative and positive side-effects and externalities of adaptation measures. Adaptation–mitigation interactions also call for integrated design and assessment of adaptation and mitigation policies, which are often developed by distinct communities.     

How to attribute market leakage to CDM projects

Abstract

Economic studies suggest that market leakage rates of greenhouse gas abatement can reach the two-digit percentage range. Although the Marrakesh Accords require Clean Development Mechanism (CDM) projects to account for leakage, most projects neglect market leakage. Insufficient leakage accounting is facilitated by a lack of applicable methods regarding the quantification and attribution of project-related leakage effects. This article proposes a method for attributing CDM-related market leakage effects to individual projects. To this purpose, alternative attribution methods are analysed. We find that project-specific approaches fail to take account of market leakage effects. Consequently, we propose to estimate aggregate market leakage effects and attribute them proportionally to individual projects. We suggest that predetermined commodity-specific leakage factors are applied by project developers to any emission reductions that are associated with a project's leakage-relevant demand or supply changes. This approach is conservative, equitable, incentive-compatible and applicable at manageable costs.     

荔波菊苣引种试验

菊苣为多年生草本植物,主要用作畜牧饲料,有较高的经济价值,对发展畜牧业有重要意义,通过菊苣引种试验成功分析,提出菊苣适合在荔波县推广种植。     

An approach to adaptation to climate changes in Poland

Adopted by COP 10 (Dec 1/CP.10) and approved by the MOP1, the Buenos Aires programme of adaptation and response measures opens doors to intensify preparations for expected climate change. By this decision the COP, requested the SBSTA to develop a structured 5-year programme of work of the SBSTA on the scientific, technical and socio-economic aspects of impacts of, and vulnerability and adaptation to, climate change. Consequently, the COP, by its decision 2/CP.11, adopted the “Five-year programme of work of the Subsidiary Body for Scientific and Technological Advice on impacts, vulnerability and adaptation to climate change” Finally during COP12 this programme was approved as “Nairobi Work Programme on impacts, vulnerability and adaptation to climate change”. This programme has fundamental significance not only for developing countries, but also for industrialized nations in which some sectors of the or social life are particularly vulnerable to climate change, specifically, inter alia EIT countries and new EU Member States. Further development of this adaptation programme economy should contain steps that provide optimum economic and social effectiveness, risk management, identification of vulnerable sectors and gaps in knowledge, preparation of a list of policy options, including an analysis of cost effectiveness, selection of the most effective policies, and a preparedness implementation plan. In Poland the preliminary adaptation programme covered agriculture, water management, and coastal zone management. For the time being, gaps in knowledge and preparedness measures have been identified. An estimation of possible impact on these areas was based on chosen GCMs, and sea level rise IPCC scenarios. In conclusion, it was stated that the results achieved should be seen as a first step forward and a more comprehensive study is necessary to update the results and cover other sectors of the economy, such as health protection, spatial planning, ecosystems and forestry, and to develop specific guidelines and recommendations for policy-makers.     

Framing the way to relate climate extremes to climate change

The atmospheric and ocean environment has changed from human activities in ways that affect storms and extreme climate events. The main way climate change is perceived is through changes in extremes because those are outside the bounds of previous weather. The average anthropogenic climate change effect is not negligible, but nor is it large, although a small shift in the mean can lead to very large percentage changes in extremes. Anthropogenic global warming inherently has decadal time scales and can be readily masked by natural variability on short time scales. To the extent that interactions are linear, even places that feature below normal temperatures are still warmer than they otherwise would be. It is when natural variability and climate change develop in the same direction that records get broken. For instance, the rapid transition from El Ni?o prior to May 2010 to La Ni?a by July 2010 along with global warming contributed to the record high sea surface temperatures in the tropical Indian and Atlantic Oceans and in close proximity to places where record flooding subsequently occurred. A commentary is provided on recent climate extremes. The answer to the oft-asked question of whether an event is caused by climate change is that it is the wrong question. All weather events are affected by climate change because the environment in which they occur is warmer and moister than it used to be.     

利用防火墙软件实现市、县局用户共享上网

介绍采用WinRoute Firewall软件实现市、县局用户共享上网的方法,使市县局用户既能共享网络资源,又能有效地保障网络安全.     

利用防火墙软件实现市、县局用户共享上网

介绍采用W inRoute F irewall软件实现市、县局用户共享上网的方法,使市县局用户既能共享网络资源,又能有效地保障网络安全。     

Linear response functions to project contributions to future sea level

We propose linear response functions to separately estimate the sea-level contributions of thermal expansion and solid ice discharge from Greenland and Antarctica. The response function formalism introduces a time-dependence which allows for future rates of sea-level rise to be influenced by past climate variations. We find that this time-dependence is of the same functional type, R(t) ～ t ^α, for each of the three subsystems considered here. The validity of the approach is assessed by comparing the sea-level estimates obtained via the response functions to projections from comprehensive models. The pure vertical diffusion case in one dimension, corresponding to α =  ?0.5, is a valid approximation for thermal expansion within the ocean up to the middle of the twenty first century for all Representative Concentration Pathways. The approximation is significantly improved for α =  ? 0.7. For the solid ice discharge from Greenland we find an optimal value of α =  ?0.7. Different from earlier studies we conclude that solid ice discharge from Greenland due to dynamic thinning is bounded by 0.42 m sea-level equivalent. Ice discharge induced by surface warming on Antarctica is best captured by a positive value of α = 0.1 which reflects the fact that ice loss increases with the cumulative amount of heat available for softening the ice in our model.     

Options to overcome the barriers to pricing European agricultural emissions

Although agriculture could contribute substantially to European emission reductions, its mitigation potential lies untapped and dormant. Market-based instruments could be pivotal in incentivizing cost-effective abatement. However, sector specificities in transaction costs, leakage risks and distributional impacts impede its implementation. The significance of such barriers critically hinges on the dimensions of policy design. This article synthesizes the work on emissions pricing in agriculture together with the literature on the design of market-based instruments. To structure the discussion, an options space is suggested to map policy options, focusing on three key dimensions of policy design. More specifically, it examines the role of policy coverage, instruments and transfers to farmers in overcoming the barriers. First, the results show that a significant proportion of agricultural emissions and mitigation potential could be covered by a policy targeting large farms and few emission sources, thereby reducing transaction costs. Second, whether an instrument is voluntary or mandatory influences distributional outcomes and leakage. Voluntary instruments can mitigate distributional concerns and leakage risks but can lead to subsidy lock-in and carbon price distortion. Third, the impact on transfers resulting from the interaction of the Common Agricultural Policy (CAP) with emissions pricing will play a key role in shaping political feasibility and has so far been underappreciated.

POLICY RELEVANCE

Following the 2015 Paris Agreement, European climate policy is at a crossroads. Achieving cost-effectively the 2030 and 2050 European targets requires all sectors to reduce their emissions. Yet, the cornerstone of European climate policy, the European Union Emissions Trading System (EU ETS), covers only about half of European emissions. Major sectors have been so far largely exempted from carbon pricing, in particular transport and agriculture. While transport has been increasingly under the spotlight as a possible candidate for an EU ETS sectoral expansion, policy discussions on pricing agricultural emissions have been virtually absent. This article attempts to fill this gap by investigating options for market-based instruments to reduce agricultural emissions while taking barriers to implementation into account.