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本文结合我校环境监测实验的现状,提出应加强课程间的衔接,增设综合性设计性实验,同时在实验教学环节,应注重教学过程,加强过程开发及考核与评价,从而唤起学生主体意识,发挥其主观能动性,在经历中和不断发现探索的过程中实现综合素质的提升. 相似文献
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科学探究作为我国基础教育化学课程与教学改革的一个基本理念，其丰富的教育教学功能以及它对培养学生科学素养的重要意义已经被广大一线教师所接受和认可。然而，理论上的认同和接受并不等于行动上的体现和落实。特别是在传统的教育观念和教学行为仍稳固的情况下，能否真正把科学探究落到实处，就成为制约这次改革能否顺利深入的关键。 相似文献
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主题学习是针对学校教育学科过于独立提出的,它源于20世纪中期的西方课程整合运动,是一种综合课程开发模式。到了20世纪末,随着人本主义和建构主义兴起,同时随着以信息技术为主的教育技术的发展,主题学习才逐渐引起教育工作者的广泛关注,如今主题学习已成为教育技术领域的热点话题。同时也是信息技术与化学课程整合研究过程中应关注的课题。 相似文献
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Internet key exchange (IKE) is an automated key exchange mechanism that is used to facilitate the transfer of IPSec security associations (SAs). Public key infrastructure (PKI) is considered as a key element for providing security to new distributed communication networks and services. In this paper, we concentrate on the properties of the protocol of Phase 1 IKE. After investigating IKE protocol and PKI technology, we combine IKE protocol and PKI and present an implementation scheme of the IKE based on PKI. Then, we give a logic analysis of the proposed protocol with the BAN-logic and discuss the security of the protocol. The result indicates that the protocol is correct and satisfies the security requirements of Internet key exchange. 相似文献
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Passive worms can passively propagate through embedding themselves into some sharing files, which can result in significant damage to unstructured P2P networks. To study the passive worm behaviors, this paper firstly analyzes and obtains the average delay for all peers in the whole transmitting process due to the limitation of network throughput, and then proposes a mathematical model for the propagation of passive worms over the unstructured P2P networks. The model mainly takes the effect of the network throughput into account, and applies a new healthy files dissemination-based defense strategy according to the file popularity which follows the Zipf distribution. The simulation results show that the propagation of passive worms is mainly governed by the number of hops, initially infected files and uninfected files. The larger the number of hops, the more rapidly the passive worms propagate. If the number of the initially infected files is increased by the attackers, the propagation speed of passive worms increases obviously. A larger size of the uninfected file results in a better attack performance. However, the number of files generated by passive worms is not an important factor governing the propagation of passive worms. The effectiveness of healthy files dissemination strategy is verified. This model can provide a guideline in the control of unstructured P2P networks as well as passive worm defense. 相似文献
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高师“学科教学论”课程内容重构之研究 总被引：2，自引：0，他引：2
"学科教学论"作为教师教育职前培养阶段的一门重要专业课,对于基础教育师资培养的质量至关重要。对"学科教学论"的学科性质、设课目的、作用和地位进行再认识,可以看出当前重新构建其课程内容的必要性和紧迫性。"学科教学论"课程内容的构建应遵循目的的明确性、理论的指导性、技能的基础性、实践的根基性、发展的持续性五项原则。我们以"化学教学论"为例,从整体结构到章节细目提出具体构建方案,为"学科教学论"的课程建设和教师教育的发展提供一个研讨、交流的案例。 相似文献
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关于高师院校“学科教学论”发展的若干思考 总被引：21，自引：0，他引：21
“学科教学论”是高等师范院校非教育专业本科生的一门必修课,是研究学科教学理论及其应用的一门教育学科。“学科教学论”与课程论、教学论并列,同属于教育学的三级学科。“学科教学论”课程的建设,要从自身学科内容的优化和拓展性课程的开发两方面入手。“学科教学论”师资队伍的建设,要注重制定规划,分层培养;加强与其他相关学科的联系,加强与中小学的联系,形成集体优势;对“学科教学论”教师给予一定的政策倾斜等。 相似文献
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通过对拜占庭攻击的详细分析,根据其特征提出了基于本体论的拜占庭攻击模型.该模型从概念类、关系、推理3个方面对拜占庭攻击进行了描述,实现了对拜占庭攻击概念的通用表达,以及各节点之间的信息共享与协同合作.最后以一类特殊的拜占庭攻击overlay network wormholes为实例,说明了该模型的有效性. 相似文献