高校信息管理系统的安全关键技术

高校信息管理系统面临的安全威胁问题日趋多样化和复杂化，系统通过统一身份认证、访问控制、数字签名等一系列安全技术设计并实现了实用有效的安全防范机制，为高校信息化办公提供有力的保证。     

Numerical investigation of cavitating flow behind the cone of a poppet valve in water hydraulic system

Computational Fluid Dynamics (CFD) simulations of cavitating flow through water hydraulic poppet valves were performed using advanced RNGk-epsilon turbulence model. The flow was turbulent, incompressible and unsteady, for Reynolds numbers greater than 43000. The working fluid was water, and the structure of the valve was simplified as a two dimensional axisymmetric geometrical model. Flow field visualization was numerically achieved. The effects of inlet velocity, outlet pressure, opening size as well as poppet angle on cavitation intensity in the poppet valve were numerically investigated. Experimental flow visualization was conducted to capture cavitation images near the orifice in the poppet valve with 30° poppet angle using high speed video camera. The binary cavitating flow field distribution obtained from digital processing of the original cavitation image showed a good agreement with the numerical result. Project supported by the National Natural Science Foundation of China (No. 59835160) and Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry of China (No. 50175097)     

基于指纹识别技术的实验室开放管理系统

介绍了指纹采集、比对在实验室开放管理系统中的用法，以及通过指纹的采集比对实现了学生的建档，实验台的分配、计时、控制及学生信息的查询、汇总。指纹技术的应用使得实验室开放管理更加方便、可靠、有效。     

数控机床的发展趋势

在现代制造系统中,数控技术是关键技术,目前正朝着高精度、高速度、高柔性、高可靠性、网络化、复合加工和基于工业PC机的开放式智能数控系统方向发展。     

浅谈增强中小学生思想品德教育实效性的途径

搞好中小学德育教育,应营造良好的道德建设环境,重视习惯培养,在实践中增强德育教育实效,将相关德育规范教育落到实处;应加强各种实践活动以提升学生道德人格,让学生在实践中学会自我教育．     

浅谈全面质量管理方法在教学管理中的应用

本文就工业企业中的全面质量管理方法如何应用于职业技术学校教学质量管理中,提出了作者的具体设想,对搞好学校教学质量管理有一定的启示和参考价值.     

高速铁路超大断面隧道施工方法数值模拟研究

针对高速铁路软弱、浅埋超大断面隧道,采用双侧壁导坑法、三台阶七步法两种施工方法分别进行三维数值模拟和开挖方法的科学性进行对比分析,结果表明:在施作大管棚超前支护的前提下,三台阶七步法比较合理.研究结论为同类工程的设计和施工提供理论参考.     

Inter-Parietal White Matter Development Predicts Numerical Performance in Young Children

In an effort to understand the role of interhemispheric transfer in numerical development, we investigated the relationship between children's developing knowledge of numbers and the integrity of their white matter connections between the cerebral hemispheres (the corpus callosum). We used diffusion tensor imaging (DTI) tractography analyses to test the link between the development of the corpus callosum and performance on symbolic and non-symbolic numerical judgment tasks. We were especially interested in the interhemispheric connections of parietal cortex in 6-year-old children, because regions of parietal cortex have been implicated in the development of numerical skills by several prior studies. Our results revealed significant structural differences between children and adults in the fibers of the corpus callosum connecting the left and right parietal lobes. Importantly, these structural differences were predictive of individual differences among children in performance on numerical judgment tasks: children with poor numerical performance relative to their peers exhibited reduced white matter coherence in the fibers passing through the isthmus of the corpus callosum, which connects the parietal hemispheres.     

建立儿童学习的脑科学交管系统——脑执行功能理论对学前儿童发展与教育的启示

本研究聚焦国际儿童发展和脑功能研究的最新发现:儿童学习的脑功能交管系统,即脑执行功能理论,以及这一理论对学前儿童发展与教育的启示。综述大量来自国外权威研究机构的最新成果,本文集中讨论儿童学习与发展的脑功能交管系统的定义,解释早期发展经验如何促进儿童脑执行功能能力的发展,强调创建适合儿童脑执行功能发展的教育环境和预防毒性压力的重要性。在此基础上,研究者针对我国学前教育的现实状况,提出了有益的建议。     

工控组态软件的发展与开发设计

工控组态软件的兴起与发展为工业过程控制、工业自动化开辟了一片新天地。介绍工控组态软件的发展现状，并从不同的角度探讨工控组态软件的开发与设计的思想，进而展望中国民族工控组态软件今后的发展方向。