-
BS EN 50710-2021Requirements for the provision of secure remote services for fire safety systems and security systems
BS EN 50710-2021Requirements for the provision of secure remote services for fire safety systems and security systems...
2022-03-31 07:45:38浏览：14
查看 -
Security Analysis of Broadcaster Group Key Exchange Protocols
Group key exchange protocols are basic protocols to provide privacy and integrity in secure group communication. This paper discusses the security of one type of group key exchange protocols and defines the kind of protocols as broadcaster group protocols. It points out two attacks on this kind of protocols. The first attack can be avoided by using fresh values in each action during one session of the group protocol. The second attack should be related with concrete application. It also proposes a dynamic key agreement protocol as an example of solutions at the last part of the paper....
2020-12-06 21:11:24浏览：25
查看 -
Analysis on mechanism of land resource security
This paper probes into the relationship among individual benefits, benefits of the country, common benefits of all humans in land use and land resource security. The following balanced land use model is proposed: the harmonious and interactive relationship between man and nature, two main bodies of land ecological system, constitutes the mechanism of land resources security. The feedback relationship between man and nature is the basis for the land resources security and the core is the relationship among people established for the benefit equilibrium in land use. The conflicts, in land use stem from the rarity of land resource and the solution to those conflicts in harmony helps land resource security....
2020-11-22 17:58:37浏览：31
查看 -
Raltitrexed arterial infusion chemotherapy analysis
Objective:The aim of this study was to analysis raltitrexed by the safety and ef icacy of intra-arterial infusion chemotherapy. Methods:Forty-seven cases in dif erent parts of cancer patients, interventional methods, based on digital subtraction angiography (DSA) prompt, raltitrexed-based chemotherapy, the tumor nourish artery infusion chemotherapy. Patients with postoperative chemotherapy side ef ects and complications, and ef icacy assessments. Results:Forty-seven patients, 2 patients had II-III degree of bone marrow suppression, the rate was 4.26%, 34 cases of I to II degree gastroin-testinal reactions, 1 case of grade III gastrointestinal reactions, the incidence of 2.13%, and 1 case mild diarrhea. I degrees or more chemotherapy-related adverse reactions did not occur in this group of patients. Al patients received at least 2 times arterial infusion chemotherapy, complete remission (CR) 3 cases, partial remission (PR) 11 cases, stable disease (SD) 17 cases, disease progression (PD) 6 cases, total ef ective rate of treatment 87.23%. Conclusion:Raltitrexed for intra-arterial chemotherapy is safe and ef ective. However, due to the smal number of this group of patients, time is short, its safety, ef-ficacy and long-term ef icacy needs further observation and validation....
2020-11-22 17:58:37浏览：30
查看 -
Analysis of Hot Topics in Cloud Computing
In the field of cloud computing, topics such as computing resource virtualization, differences between grid and cloud computing, relationship between high-performance computers and cloud computing centers, and cloud security and standards have attracted much research interest. This paper analyzes these topics and highlights that resource virtualization allows information services to be scalable, intensive, and specialized; grid computing involves using many computers for large-scale computing tasks, while cloud computing uses one platform for multiple services; high-performance computers may not be suitable for a cloud computing; security in cloud computing focuses on trust management between service suppliers and users; and based on the existing standards,standardization of cloud computing should focus on interoperability between services....
2020-11-22 17:58:37浏览：27
查看 -
A hierarchical algorithm for cyberspace situational awareness based on analytic hierarchy process
The existing network security management systems are unable either to provide users with useful security situation and risk assessment, or to aid administrators to make right and timely decisions based on the current state of network. These disadvantages always put the whole network security management at high risk. This paper establishes a simulation environment, captures the alerts as the experimental data and adopts statistical analysis to seek the vulnerabilities of the services provided by the hosts in the network. According to the factors of the network, the paper introduces the two concepts: Situational Meta and Situational Weight to depict the total security situation. A novel hierarchical algorithm based on analytic hierarchy process (AHP) is proposed to analyze the hierarchy of network and confirm the weighting coefficients. The algorithm can be utilized for modeling security situation, and determining its mathematical expression. Coupled with the statistical results, this paper simulates the security situational trends.Finally, the analysis of the simulation results proves the algorithm efficient and applicable, and provides us with an academic foundation for the implementation in the security situation....
2020-11-22 17:58:37浏览：29
查看 -
中国煤炭产业生态安全度研究
本文以煤炭产业土地环境、煤炭产业水环境、煤炭产业大气和煤炭产业生态控制力为基本指标,运用计量模型对2005-2009年间我国煤炭产业生态安全度进行了评价。结论认为,尽管我国煤炭产业处于基本生态安全状态,但是这几年的煤炭产业生态安全度在不断减弱。我们可以从实施节约优先的发展战略、综合开发利用与煤共伴生资源和煤矿废弃物、加强节能和能效管理等方面入手提高煤炭产业生态安全度,促使社会持续发展。...
2020-11-08 11:20:08浏览：27
查看 -
基于绿色化学理念的生物燃料乙醇教学设计
针对绿色化学的概念、原理和特点,并根据当今中国能源安全和环境安全下的经济可持续发展战略,设计以生物质为原料替代化石燃料生产车用燃料乙醇的教学。目的使本科大学生既掌握绿色化学的基本理念,又结合当代中国发展的实际,了解车用燃料乙醇尤其是第二代燃料乙醇的前沿进展。...
2020-09-30 09:14:00浏览：25
查看 -
-
-
应用安全改造的要点与难点
基于等级保护应用安全的要求，结合应用安全咨询经验，分析了应用安全主要问题点，针对性的从应用安全功能和应用安全场景两大维度提出了应用安全改造的要点，剖析了应用安全改造整个过程中主要的难点，并明确了应用安全改造后的验证的重要性。...
2020-09-03 16:42:35浏览：42
查看 -
Scenario simulation of water security in China
Limited water resources, increasing demand, low use efficiency, and serious pollution result in severe water resource difficult in China. The evaluation of addressing water problems and the search for effective countermeasures that ensure sustainable water use are key to China's sustainable development. The "compound water security" consists of food security, life security, environmental security, and economic security. By establishing a conceptual model, the water security of China has been simulated in terms of four scenarios called BAU(the business-as-usual scenario), TEC(the technology and economics scenario), IVL(the institution, values, and lifestyles scenario) and TSD(toward sustainable development) in this paper. The results indicated that water crises, especially water shortages, are being experienced now and will continue to do so for a relatively long time in China and that it is possible to reach a basic balance between supply and demand of water and grain under the TSD developing pattern by a series of approaches including technological innovation, policy adjustments, and behaviour inducement....
2020-07-08 08:49:41浏览：38
查看 -
中国天然气供应安全评价及对策
目前中国正处于天然气高速发展阶段，天然气的稳定、可持续供应显得尤为重要。为了评价中国的天然气供应安全水平，分别以供需安全和市场安全2个维度、9个关键因素作为评价指标，以2006—2013年的数据为样本，采用主成分分析法进行评价。结果表明，中国天然气供应安全可以划分为三个阶段：第一阶段为2006—2008年，天然气供应较为稳定阶段；第二阶段为2009—2011年，天然气供应安全度明显下滑、供需失衡加剧阶段；第三阶段为2012—2013年，天然气供应安全度平稳下降、开始进行调整的阶段。随着天然气需求的增加，天然气供应安全将面临更大挑战。中国应采取更多的措施以确保天然气供应安全。...
2020-03-24 08:52:25浏览：1401
查看
