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1.
进入21世纪，中国周边形势总体上相对稳定，但也存在着众多不确定的因素。文章从地缘政治视角对影响中国周边安全环境的因素加以略论，并对中国的地缘战略选择进行了再思考。 相似文献
2.
一种安全物理隔离系统的设计与实现 总被引：3，自引：0，他引：3
提出了一种基于PCI总线的物理隔离系统,该系统采用物理隔离技术、强身份认证技术、安全审计技术等实现内外网的物理隔离.利用PCI接口控制电路、网络接口电路和逻辑控制电路实现了系统的自适应网络功能和内外网的安全物理隔离,能自动识别所连接网络设备的速率和工作方式,并自动将工作方式和速率调整到正确的模式与之相适应.系统管理软件包括安全策略管理模块、安全审计模块、数据库记录交换模块、文件交换模块和邮件交换模块,以实现内外网数据安全高效的交换和管理;使用Windows DDK实现了基于NDIS的硬件驱动程序.系统原型已在湖北省公安消防总队政府上网工程中稳定高效地运行,其关键技术的实现对相关课题研究具有普遍意义. 相似文献
3.
随着我国高等教育事业蓬勃发展，实验室(大楼)建设掀起新高潮，趋向现代化，起点和标准都大大提高，提出应重视在建设初期配套问题，如实验室布局、基础设施、技术条件等，使大投入产生大效益。 相似文献
4.
A.H. Herzig 《Educational Studies in Mathematics》2002,50(2):177-212
The mathematics community in the U.S. has become concerned about the state of doctoral education, including concerns about
high attrition rates and the small numbers of women and students from some racial and ethnic groups. This paper proposes a
model of doctoral student persistence and attrition, in which student participation in the life of the department and discipline
lead to increased student integration, which is crucial for students' success. Ten faculty members and eighteen graduate students
were interviewed about their interests,conceptions, and experiences within mathematics, in a case study of one mathematics
department. In this department, students experienced four types of obstacles to their participation: obstacles stemming from
the program structure, obstacles to participation in class, obstacles to participating with faculty outside of class, and
obstacles stemming from faculty beliefs about teaching and learning. Implications for the retention of mathematics doctoral
students are discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
5.
周学礼 《常熟理工学院学报》2011,25(4):98-101
周围神经CT图像增强是周围神经三维重建中的基础环节,本文在分析高斯圆模型Hessian矩阵特征值特点的基础上,提出一种基于Hessian矩阵多尺度滤波的周围神经CT图像增强算法.实验证明该方法能够使似圆形周围神经区域得以增强,抑止其他非圆形区域的干扰,得到较好的周围神经增强图像,为后续的分割与三维重建奠定基础. 相似文献
6.
MV10 is an MCU which consists of PWM,ADC,CAN and some other function blocks.It is designed for car body's control.Advanced peripheral bus (APB) is a low speed AMBA bus connecting low-power peripherals.This paper presents an implementation of APB interface for MV10 MCU.After that,MV10 can be integrated into any AMBA system on chips (SoCs) easily.We have built a multi-core system with ABMA to verify this design.In this system ARM9 is a main processor mounted on AHB and MV10 acts as a low-power and low-speed slaver on APB.Before building this system,some operations are encapsulated into a task with dedicated ID.MV10 works as a co-processor with ARM by acquiring task ID from ARM.The result of simulation indicates that MCU can work well as expected.Based on our design,MV10 can be mounted on any AMBA system from now on. 相似文献
7.
David H. Johnston 《Cambridge Journal of Education》2016,46(4):533-551
A recent Review of Teacher Education in Scotland reports that 23% of respondents (n = 2381) encountered variable or very poor school placement experiences. This paper uses Lave and Wenger’s ideas concerning Communities of Practice (1998) and Legitimate Peripheral Participation (1991) as analytical tools with which to understand the nature and impact of student teachers’ problematic experiences of school placement. A total of 14 Professional Graduate Diploma in Education students on a one-year Secondary English course were followed through the practice elements of their Initial Teacher Education programme and data were constructed from learning logs and semi-structured interviews. Analysis provided a nuanced account of the student teachers’ difficulties in attaining member status as Legitimate Peripheral Participants in communities of practising teachers, with the concepts ‘joint enterprise’, ‘mutual engagement’ and ‘shared repertoire’ being found to be useful in explaining these difficulties. Limitations in the theoretical framework were also discovered and these are highlighted and developed in the paper. 相似文献
8.
This review critically examines the use in literacy research of Lave and Wenger's (1991) construct of legitimate peripheral participation (LPP), a view of learning as participation by which newcomers adopt a group's ways, moving from periphery to the center of a practice. From a search through 10 literacy-relevant journals from 1991 to the present, we purposively selected 20 pieces that relied centrally on LPP and analyzed these for ways in which practice and apprenticeship were instantiated. Regarding practice, we inquired about legitimacy and engagement; regarding apprenticeship, we asked about the deployment of experts' attention and the cost of newcomers' mistakes. Using the benefit of the 20+ years since the original publication, our critique offers six principles to evaluate researchers' use of LPP and community of practice as constructs to describe learners' experience, and summarizes how some of our 20 studies made felicitous use of the constructs and others less so. 相似文献
9.
布仁吉日嘎拉 《贵阳师范高等专科学校学报》2012,(1):24-26
近年来,我国金融当局的一些决策行动体现了中央政府对人民币区域化的支持态度。显然,相对于本国在世界经济中的地位和境外市场对人民币的强大需求而言,当前在国际贸易中人民币的使用仍然非常有限。我国政府与周边各国官方之间缺乏相应的政策互动关系,这已成为了人民币合法跨境流通及区域化的重要障碍。笔者为此提出我国与周边国家之间关于人民币区域化的政策互动之必要性,并试述其客观基础、目的和研究方法及意义。 相似文献
10.
熊仲儒 《安徽师范大学学报(人文社会科学版)》2009,37(5):560-566
外围格是工具等语义成分,它常常作为附加语引进句法结构,也可以作为论元引进句法结构,后一种用法常常被忽视.外围格可以由扩展动词的功能范畴引进,它在句法行为上不同于附加语,前者可以阻止动词后的宾语的话题化,而后者不能.两种不同的身份也可以解释说话者的语感差异,作论元时为工具受事,可以被"的"字结构转指;作附加语时为纯粹工具,不能被"的"字结构转指. 相似文献