国产算法安全芯片与市场应月

随着信息技术的发展,物联网进程逐渐加快,信息安全工作愈加重要。安全芯片可以应用在信息系统安全的各个方面,安全芯片具有更高的安全性和其他方案不可比拟的优点;国家密码管理局颁布的国密算法具有安全性和制度性两方面优势。因此,将国产算法与安全芯片技术相结合,采用国产算法的安全芯片必将在信息社会各领域中得到广泛应用,并具有巨大的市场前景。     

制定我国新辐射防护规定中值得研究的几个问题

本文描述了制定新辐射防护规定时值得研究的几个问题。１．明确规定人为活动引起的天然辐射照射的控制要求，包括地下矿山和矿物提取工业的职业照射，喷气飞机机组人员的职业照射，以及居室中氡的照射。２．明确和加强当前辐射防护工作需要解决问题的内容，包括流出物的控制，下水道中放射性物质的控制和监测。讨论了应用ＢＳＳ豁免标准时的某些问题。３．吸取国际辐射防护的新经验，其中特别是ＩＣＲＰ的推荐书和ＩＡＥＡ的标准和导     

氘核中子反应截面的法捷耶夫方程理论计算

中子引起的轻核反应是核数据研究的重要内容。当前我国核数据库中氘核中子反应截面的计算结果局限于采用s 波可分离势,且入射能量在20 MeV以下。需要发展三体核反应的法捷耶夫方程理论方法,采用超出s 波的核子 核子相互作用,从而对更高能量范围内氘核全套中子反应截面做出准确的描述。本文介绍了利用法捷耶夫方程计算n+d三核子反应体系的弹性散射微分截面、破裂反应、破裂反应出射中子和质子的双微分截面的理论框架及数值计算结果,同时计算了弹性散射总截面和破裂反应总截面的激发函数。计算结果与实验数据及CENDL 32、ENDF/B Ⅷ.0、JENDL 5、JEFF 33等数据库中的评价数据符合较好。     

高放废物处置库系统性能评价内容及方法

高放废物处置库系统性能评价研究对确保高放废物处置库的长期安全运行具有重要意义,本文介绍了高放废物处置库系统性能评价的内容及方法。     

煤矿安全重在重塑煤炭行业管理体制

近几年我国矿难频发，有煤矿企业超能力生产、安全欠账多、人才匮乏、培训水平低和监管格局不当等原因。但其根本原因在于我国缺乏统一的煤炭行业管理机制。解决这一问题的根本途径在于重塑我国煤炭行业管理体制。     

Hydrogen and oxygen from water—II: Some considerations in the reduction of the idea to practice

An analytical model of an archetypal device for using solar energy in a one-step thermochemical process for producing hydrogen and oxygen from water is presented. It is used to help us anticipate and evaluate sources of irreversibilities associated with the operation of various components of such a device and to suggest alternatives which should be considered.     

A Direct Comparison of the Fragmentation Test and the Microbond Pull-out Test for Determining the Interfacial Shear Strength

Experiments were conducted to compare the fragmentation test with the microbond pull-out test for determining the interfacial shear strength between carbon AS4 fibers and a thermoset matrix consisting of a Di-Glycidyl Ether of Bisphenol A (DGEBA) resin cured with a diamine (meta-phenylenediamine, m-PDA) curing agent. The results indicate that, for the microbond test, diffusion of the rather volatile m-PDA curing agent at early stages of cure leads to low values of interfacial shear strengths when compared with results obtained for the same system with the fragmentation test.

With the microbond test, a distinct relationship between the glass transition temperature of the droplets and their size is noticed. Smaller (< 150 μm) droplets have very low Tg's and are incompletely cured. While changing to a modified curing cycle and/or using a m-PDA-rich curing environment alleviates the diffusion problem, the interfacial shear strength values are still not in good agreement with the fragmentation test results. Microbond data from another system consisting of DGEBA resin cured with a different, less volatile dimaine curing agent indicates that diffusion of the curing agent becomes less severe as the volatility of the curing agent decreases and the corresponding microbond interfacial shear strengths agree better with fragmentation test results.     

ON‐LINE MONITORING OF POLLUTION CONCENTRATIONS WITH AUTOREGRESSIVE MOVING AVERAGE TIME SERIES

The concentration of aerosol particles, largely caused by traffic volume and often enhanced during temperature inversion episodes in the cold season, can be a concern for human health in the urban environment. This particulate matter is typically recorded as PM₁₀, the total mass of particles below 10 μm in diameter. It is suspected that, within the PM₁₀ class, ultrafine particles ( < 100 nm) may be responsible for causing respiratory and cardiovascular diseases. Because of their low mass, ultrafine particles are hard to detect, and researchers try to utilize PM₁₀ in combination with nitrogen oxides NO_x and other trace gases to monitor their dynamic evolution. To meet pollution standards set by national government and European Union regulation, the city of Klagenfurt, Austria, began using calcium magnesium acetate as a deicer on 11 January 2012, hoping to literally glue pollutants to the ground and thereby reducing pollution concentrations. With the statistical methodology developed in this article, the dynamic evolution of PM₁₀ and NO_x is traced for the time period starting 4 January and ending 25 January 2012, and a change in dynamics is found. The findings are based on on‐line monitoring procedures that sequentially detect structural breaks in the mean and the parameter values of an autoregressive moving average process. These are defined in terms of model residuals and one‐step ahead predictors. Theoretical properties are studied, and a simulation study shows that the proposed procedures work well in finite samples.     

航空企业动态联盟管理系统设计与实现

为了对航空企业动态联盟运作过程进行合理高效管理,根据航空企业产品开发的特点和需求,提出了航空企业动态联盟管理系统的功能结构;分析了系统的操作流程;研究了系统中的关键技术,根据产品并行工程的要求兼顾分布式设计资源系统协调工作的特点,制定了任务分解原则,采用层次分析法解决了盟员选择问题,采用工期-费用优化模型对进度调整问题进行了研究;最后基于struts框架选择JSP、JDBC和Tomcat等技术实现了系统。管理系统在某航空企业进行了测试和使用。     

刘桥一矿地质构造特征及断裂构造导水性分析

通过对刘桥一矿地质构造及水文地质情况全面掌握,结合区域地质构造演化史,总结矿井地质构造的总体特征与构造展布,归纳主要断层发育基本规律,并对主要断裂构造导水性进行分析,为了解深部采区主要断层部分地段的导水性进行预测,为煤矿安全生产提供地质资料。