地震信息化共用服务平台设计与实现     

帅向华  董翔  席楠  李继赓  李华玥 《中国地震》2021,37(1):170-184

随着信息技术的飞速发展和信息化的推进,各个项目建设均要对硬件、网络、数据库、软件平台和系统进行重复的规划与建设,项目建设的系统越多,操作系统和应用服务的部署和运维就面临着越大的挑战,同时也造成了大量硬件资源的浪费,需要较高的成本进行维护。本文介绍了地震信息化项目中,利用云计算和大数据技术构建地震信息化共用服务平台,通过统一的基础设施建设和资源管理,提供一系列地震相关系统开发过程中需要的共用基础服务,使得开发人员能够在云平台提供的服务基础上,高效弹性地对系统进行开发、部署和运维,大大提高了资源利用率和时间效率。  相似文献   

Justice and cost effectiveness of consumption-based versus production-based approaches in the case of unilateral climate policies     

《Global Environmental Change》2014

In recent years, climate policy under the United Nations system has been characterized by bottom-up, national approaches to climate mitigation. This raises concerns about the overall effectiveness of these mitigation policies, for example due to carbon leakage. In response to these concerns, authors have repeatedly suggested that policy makers consider a consumption-based climate policy approach. We analyze the potential merits of a switch to a consumption-based policy approach using the criteria of justice and economic efficiency. We argue that emissions must be understood as being contributed by both, consumers and producers, but that this fact does not by itself settle the question whether consumption or production ought to serve as the climate policy base. Rather, the perspective of justice necessitates an analysis of the distributive consequences of switching from a production- to a consumption-based policy.We find that both (global) cost-effectiveness and justice can be improved if the unilateral climate policies of industrialized countries are based on emissions from consumption. There are preconditions, however, the switch in the policy base must be accompanied by clean technology transfer, and if implemented by border carbon adjustments, import tax revenues need to be channeled to developing and emerging economies. We further show that in such a setting, export rebates are of minor importance for efficiency and justice.  相似文献   

三维倾斜界面PS转换波CMP道集时距及参数估计   总被引：1，自引：1，他引：0       下载免费PDF全文

蔡明刚  姚陈  王海宁 《地球物理学报》2012,55(7):2432-2440

在PS转换波资料处理过程中,往往需要联合P波资料提供相应的模型.在实际应用中存在P波和PS转换波层位对比困难.本文仅利用PS转换波数据,通过三维倾斜界面PS转换波CMP道集精确时距关系推导了近似时距解析表达式;分析了PS波的精确与近似时距关系随测线方位、界面倾角与倾向的变化规律及其拟合误差;并讨论了近似时距关系的三个时距参数随方位的变化特征;理论上给出描述时距的三维倾斜界面倾角、倾向、深度、纵波速度和横波速度这5个独立参数的估计方法,并通过理论模拟数据证明了该方法的可行性.  相似文献   

Uptake and biological effects of synthetic glucocorticoids in common carp (Cyprinus carpio)     

Kei Nakayama  Yoshiyuki Inoue  Naomi Ikeda  Naoki Hashizume  Hidekazu Murakami  Takeshi Ishibashi  Hirofumi Ikeda  Tomohiko Isobe  Shin-Ichi Kitamura  Go Suzuki 《Marine pollution bulletin》2014

Uptake and biological effects of synthetic glucocorticoids (GCs) were analyzed using common carp (Cyprinus carpio). Fish were exposed to clobetasol propionate (CP) or clobetasone butyrate (CB) individually or in mixture at 1 μg L⁻¹ for 21 days. Bioconcentration factor (BCF) of CB was calculated as 100, and BCF of CP was less than 16. No effects were found in fish erythrocyte and leukocyte numbers and serum glucose levels after exposure to the selected GCs. On the other hand, serum concentrations of free amino acids significantly increased in GC-exposed groups. Thus, exposures to synthetic GCs at relatively low concentrations seemed to cause enhancement of protein degradation and subsequent increase of serum free amino acids without a corresponding increase in serum glucose levels, an effect which might be related to partial induction of gluconeogenesis by GC.  相似文献   

灾害预警平台多源信息多层次精细化编码系统研究          下载免费PDF全文

张迪  李泽椿  施培量  于新文 《高原气象》2009,28(6):1498-1504

由于我国各类灾害频繁发生, 防灾减灾迫切需要建立一个覆盖全国、 畅通有效的灾害预警信息综合发布平台。通过分析对比国内外有关灾害预警信息编码, 设计适合我国国情, 并与国际通用警报协议接轨的灾害预警平台多源信息多层次精细化编码系统, 有效地解决预警信息的地理编码、 信息编码和共享规范问题, 为我国建立覆盖全国、 畅通有效的灾害预警信息综合发布平台提供技术支撑。  相似文献   

The effects of land tenure on vulnerability to droughts in Northeastern Brazil   总被引：1，自引：0，他引：1  

Fabiano Toni  Evandro Holanda Jr.   《Global Environmental Change》2008,18(4):575

This article presents evidence on two distinct farming systems—one that utilizes common property pasturelands and another based on private pasturelands—in the Brazilian semi-arid zone. The research is based on a survey carried out in the state of Bahia in 2002. A bivariate analysis was carried out to compare agricultural outputs and income generated in each system. Data suggest that there are no significant differences between the two groups concerning income generation. However, farmers using common pasturelands have more diversified systems and invest more on small-animal husbandry, which are adapted to the dry environment. As a consequence, families that use common pasturelands have a higher consumption of animal protein. These families are thus not necessarily more vulnerable to droughts than those with private pasturelands. Formulating effective institutions to control access to the commons is a strategy pursued by some communities, yet, their ecological sustainability is still unknown.  相似文献   

How can marine ecosystem services support the Blue Growth agenda?     

《Marine Policy》2017

The EU Blue Growth Agenda targets maritime economic activities that have the sea and the coasts as drivers. These activities are supported by marine Ecosystem Services (ES) in combination, or not, with abiotic outputs from the marine natural capital. This paper analyses Blue Growth activities with regards to the demand and supply of marine ES and Good Environmental Status (GES). The results show that marine provisioning ES support aquaculture and blue biotechnology, while blue energy is supported by marine provisioning ES and by abiotic provisioning, and abiotic provisioning supports extraction of marine mineral resources. Maritime, coastal and cruise tourism is supported by cultural marine ES and cultural settings dependent on marine abiotic structures. All these multi-sectoral economic activities depend on healthy marine and coastal ecosystems that are provided by regulating and maintenance ES combined with the abiotic regulation and maintenance by natural marine physical structures and processes. In order to balance concurrent sectoral interests and achieve sustainable use of marine resources there is the need to consider indicators for demand for ES, which are social and economically driven, and for the supply, which are dependent on ecosystems capacity to provide the required marine ES. Some of the actions foreseeing GES are already anticipated in legislation that underpin Blue Growth, whilst others could benefit from additional regulation, particularly in what concern the exploration and exploitation of marine mineral and biological resources. Blue Growth options require navigating trade-offs between economic, social and environmental aspects.  相似文献   

面向多应用系统的位置公共服务(LBCS)模式研究与平台设计     

许玉斌  陈秀万  黄岚岚  马磊  沈阳 《地理与地理信息科学》2012,28(3):40-43,48

当前的LBS应用系统多采用独立构建方式,将LBS通用服务功能与应用系统相关功能集成,使系统内部耦合程度较高,虽然能够保证应用系统的完整性,但导致LBS通用服务功能难以共享,造成系统的扩展性差以及数据、计算资源的浪费。该文探索了面向多应用系统的位置公共服务(LBCS)的服务模式与系统体系结构。基于这种服务模式,位置服务系统将由两大部件构成:LBS公共服务平台和专业应用系统,且LBS公共服务平台能被多个应用系统使用。  相似文献   

The rise and transformation of the Brazilian landless movement into a counter-hegemonic political actor: A Gramscian analysis     

Abdurazack Karriem 《Geoforum》2009,40(3):316-325

The Brazilian Landless Movement (MST) is widely acknowledged as one of the most organized, dynamic, and influential social movements in Latin America. The MST has increasingly inserted the struggle for land within larger political contestations for broad social change, leading conservatives and leftists alike to describe it as a “first class actor” in Brazilian politics. What explains the move from corporatist struggles for land to broader counter-hegemonic contestations; put differently, how did the MST come to acquire ‘global ambition’? Much of the literature on the MST analyzes its external actions but without explaining what drives these actions. This paper utilizes a Gramscian political ecology approach to comprehend the MST’s political actions and its rise and transformation into a counter-hegemonic political actor. Specifically, I evaluate the development of the MST’s organizational praxis from corporatist struggles for land in the late 1970s to ‘global ambition’ and changing nature-society relations by the early 2000’s. Such an approach brings to light the role of organization building, political education, alliance building, and subaltern agency in propelling the MST’s political mobilizations. In so doing, this paper contributes to the literature on the MST and collective action. This paper also engages with a ‘politics of scale’ since the conquest of geographic scale is critical to understanding the MST’s national growth and political actions. This paper concludes by arguing that the rise and transformation of the MST into a vibrant counter-hegemonic actor in Brazilian politics was a gradual process that matured as it territorialized into a national movement.  相似文献   

共反射面元叠加的应用理论--从共反射点到共反射面元   总被引：22，自引：5，他引：17       下载免费PDF全文

王华忠  杨锴  马在田 《地球物理学报》2004,47(1):137-142

共反射面元（CRS）叠加是目前认为最好的生成零炮检距剖面的方式. 共反射面元 意指地下某一反射点邻近的一个反射弧段,该弧段在时空域内的走时响应称为CRS叠加面,该 叠加面可视为反射弧段上各共反射点（CRP）的时空域内走时响应的组合. 在一般的共反射 点走时关系基础上,引入两种特征波——Normal波和Normal Incidence Point波,就可以在 傍轴近似假设下,将CRP走时关系推广到反射点邻近的各反射点,将这些反射点的CRP走时关系 加以组合就得到了关于该反射点的共反射面元的走时关系. 考察从共反射点（CRP）到共反 射面元(CRS)的过渡,这一过程提供了CRS叠加的应用理论基础.  相似文献