基于IPSec与基于MPLS的VPN的比较与分析

介绍目前两种热门的VPN技术：IPSec—VPN和MPLS—VPN,分析和比较了这两种VPN技术在安全性、可扩展性、使用方便性和QoS支持等特点,给出了两种VPN技术各自适合的应用领域。     

集群式计算机系统在生物信息学中的应用

1　Introduction　SMP (symmetricmulti processing)andMPP (mas sivelyparallelprocessing)arethetwotypesofstruc tureofparallelcomputing .　Symmetricmulti processingsystemshavemultipleCPUsattachedtothesamebusandsharingRAM .Massivelyparallelprocessingisthecooperated pro cessingofaprogrambymultipleprocessorsthatworkondifferentpartsoftheprogram ,witheachprocessorusingitsownoperatingsystemandmemory .ThechoicebetweenSMPandMPPdependsonthenatureoftheproblembeingsolved .Iftheproblemcanbeeasilypartit…     

教育过程视角下高校自考助学价值研究

教育过程为研究高校自考助学价值提供了一个新的角度。教育是对教育者进行教育的过程,高校自考助学作为教育的一种方式,注重的是助学教育的过程。高校自考助学具有教育的过程价值,其主要表现为自考助学过程中实现的制度价值、社会价值和教育交往价值。研究和探索自考助学的价值,对于在新形势下建设中国特色自考助学的终身学习体系具有重要的现实意义。     

Success in Geology --Give My Respects to Dad

朱筱敏——中国石油大学教授,荣获第十一次李四光地质科学奖。除去种种光环,朱教授在生活中也扮演着一个普通父亲的角色,来看看女儿眼中的朱教授是什么样子的。     

残差控制图在叶丝干燥出口含水率上的应用

为解决常规控制图在叶丝干燥出口含水率监控中大量虚发警报,造成控制图监控失效的问题,采用时间序列模型对叶丝干燥出口数据进行拟合分析,使用残差控制图对含水率进行监控,降低了控制图的误警报率,提高了控制图在出口含水率控制中的应用效果.     

高校扩招何以实施——基于“资源稀释模型”的解释

虽然高校扩招政策已经实施十余年,但学者们对其关注度依然不减。从现有文献资料来看,学者们关注更多的是高校扩招的背景以及扩招所带来的影响等,而对我国为何可以顺利实施高校扩招给予的关注却很少。笔者从资源稀释模型(Resource Dilution Model)的视角,探讨在我国为何得以顺利实施高校扩招这一具有深远影响的政策。     

学前教育专业“三学”受到的挑战与未来改革路径

三学是学前教育学、学前儿童心理学、学前儿童卫生学的简称,一直是学前教育专业课程体系的核心。然而,随着幼儿园教师教育的快速转型,学前教育专业培养幼儿园一线教师的目标更加明确,三学的传统核心地位受到挑战,急需变革。有必要将学前儿童心理学改为早期儿童发展科学,将学前教育学改为幼儿园教师的学前教育学,将学前儿童卫生学改为学前儿童保育学。改革的关键是思维方式的转换。     

浅析张之洞的学前教育思想

被誉为晚清＂第一通晓学务之人＂的张之洞,经历了中世纪的＂欧风美雨＂,希冀用＂中体西用＂的理念来挽救日薄西山的清朝。他一生除积极创办近代企业之外,其文教事业上的成就也为人所共识。特别在学前教育上,张之洞亲自参与拟定了中国第一个学前教育法规,推动了学前教育近代化发展的历程     

Theory to reality: a few issues in implementing problem-based learning

The success of an intervention depends not only upon its theoretical soundness, but also on proper implementation that reflects the guidelines derived from its theoretical conception. Debates surrounding the effectiveness of problem-based learning (PBL) have focused on its theoretical conception and students’ learning outcomes, but implementation is seemingly absent from the picture. This paper attempts to describe what research evidence is needed to fill in this missing information and provide a clearer picture of PBL. The author examines current PBL implementation practices and identifies potentially confounding variables that may play a role in inconsistent or conflicting research results in PBL. For example, various models of PBL have been developed and implemented to afford the specific instructional needs of the institution or learner population. These PBL models are in fact quite different in terms of the nature of problem solving and the degrees of self-directed learning, which theoretically, should result in different types of learning outcomes. Without distinguishing the models used, the results of comparative PBL research could have been confounded. Furthermore, human factors are another set of confounding variables that could influence the students’ learning processes and consequently affect PBL implementations and research results. To remedy these problems and reach PBL’s full potential, as well as obtain a more accurate picture of PBL as an instructional method and its effects on students’ learning, some fundamental changes are needed.     

The Challenges Facing Early Childhood Care,Development and Education (ECCDE) in an Era of Universal Basic Education in Nigeria

Early childhood is a critical period of rapid physical, cognitive, and psycho-social development of a child. The quality of care and education which a child receives at this crucial age will determine to a great extent the level of his/her physical and cognitive development in the future. In Nigeria, Early Childhood Care, Development and Education (ECCDE) is an aspect of Universal Basic Education which was introduced in 1999 to increase the access of children to basic education and improve the state of education in the country. While all hands are on deck to ensure successful implementation and achievement of the objectives of the scheme, it is unfortunate that ECCDE is facing some challenges thus making it unrecognized in Nigeria. This paper examines the challenges of early childhood education in Nigeria. To improve the situation, the following measures are recommended: establishment of more public crèche, kindergarten, and nursery schools by the government; enforcement of the use of mother tongue in the teaching of children; training more personnel in the field of early childhood education in tertiary institutions; and introducing unified curriculum as well as providing more infrastructures.