北京市乡镇煤矿安全监测系统使用问题研究

北京地区乡镇煤矿在安全监测监控系统的使用上存在诸多问题,文中列举了极具普遍性的问题,并对问题原因进行分析,根据分析提出规范使用的建议,与同行商榷。     

高校开展行政监察工作的现状分析与对策思考

随着高等教育改革发展的深入推进,高校面临着许多新情况、新问题,如何进一步强化内部行政监察职能,更好地贯彻"依法治教"方略,有效遏制腐败行为,成为了高校管理中面临着的一个重要课题.在对目前高校开展行政监察工作现状进行分析的基础上,查找存在的主要问题,提出新形势下进一步做好行政监察工作的对策措施.     

浅谈企业人事档案管理

人事档案管理是人力资源管理的重要组成部分,本文通过讨论人事档案工作的重要性,挖掘分析了我国目前企业人事档案管理存在的一些问题,从而提出了一些人事档案管理工作中的一些对策,以期使人事档案管理更好地适应信息时代的需求。     

高中文理分科:问题实质、利弊分析及改革路向

文理分科(或合科)问题的本质是知识中心主义、基础主义、二元对立思维和应试主义教育思想的现实表现;我国普通高中目前普遍实行文理分科这一教育模式有其存在的合理性和优势,也有一定的弊端,但基本判定结果是利大于弊。解决这些弊端的方法不是简单地抛弃"分科"选择"合科",而是在关注解决问题思维方法的基础上,渐进地改革和完善"文理分科"模式。未来改革与发展的路径和策略是:兼顾知识、能力与个性培养,注重学生科学与人文素养的整合,多维立体地改革高考制度。     

教学论研究三十年：实然之境与应然之策

中国教学论经过改革开放三十年的快速发展,逐渐形成体系结构比较完整,知识积淀丰富,研究视角宽广,研究方法多样,研究成果丰硕,研究队伍日渐壮大的繁荣景象。在三十年的发展历程中,成就与问题并存是教学论研究的实然状态,教学论学科性质与研究范型上还没达成共识,研究范畴边界尚未明确,特有的话语体系还不十分明显,这些问题在一定程度上影响着教学论学科的健康发展。在新时期,教学论学科何去何从？我们以为,不断加强教学论研究的学科意识、本土意识、历史意识和问题意识,促进国际化与本土化相结合、传统与现代相结合、科学与人文相结合、多元化与个性化相结合,注重实际问题解决又注重体系建构相结合,实现教学论研究由经验累积到科学综合,由简单抽象到复杂生成,由学科成长到弘扬学派精神,是现代教学论发展的必然趋势和应然之策。     

自然灾害环境中的在线导航问题竞争分析

以旅行者的旅行时间最短为优化目标,用竞争分析的方法考虑了自然灾害环境中的在线导航问题,提出了旅行者在受灾区行走的上界控制策略,通过竞争比和竞争性能分析,结果表明上界控制策略具有该问题最优竞争比2k＋1,并且竞争性能得到了提高．     

Chemistry problem solving instruction: a comparison of three computer-based formats for learning from hierarchical network problem representations

Within the cognitive load theory framework, we designed and compared three alternative instructional solution formats that can be derived from a common static hierarchical network representation depicting problem structure. The interactive-solution format permitted students to search in self-controlled manner for solution steps, static-solution format displayed all solutions steps, and no-solution format did not have solution steps. When we matched instructional time across the formats, in relation to the complex molarity problems rather than the dilution problems, differential transfer performance existed between the static-solution or no-solution formats and the interactive-solution format, but not between the static-solution format and no-solution format. The manner in which learners interact with the static-solution and no-solution formats depends on their level of expertise in the chemistry domain. With considerable learner expertise, provision of solution steps may be redundant incurring extraneous cognitive load. Absence of the solution steps may not have left sufficient cognitive capacity for germane cognitive load as some beginning learners lacked the prior knowledge to deduce the solution steps. Searching for solution steps presumably incurred extraneous cognitive load which interfered with learning and hence, in the interactive-solution format, it outweighed the benefit of engaging in self-regulated interaction with the content. Hence, cognitive load theory is a promising tool to predict the mental load associated with learning from the three alternative computer-based instructional formats.     

新时期我国劳资关系演变的趋势和对策分析

经济体制转型以来,我国非公经济快速发展,吸纳的就业人口迅速增加,社会劳资关系日益普遍化.在此过程中,劳资利益矛盾一直没有引起人们的重视,导致劳资矛盾已经发展到相当尖锐的程度,成为诱发社会矛盾和冲突的主要根源之一.本文从我国劳资关系的形成演变入手,对劳资关系恶化的表现与原因进行分析,并对建立新型的劳资两利关系提出了政策建议.     

Teaching physics in junior high school: crossing the borders of fear

Israeli junior high‐school science teachers usually have a background in biology, and their knowledge of physics is limited. We show that by improving teachers' qualitative understanding it is possible to increase their confidence and willingness to teach physics. We conducted three‐day workshops for teachers (n = 92), which were followed by ongoing activities and support. The teacher workshops were based on a new qualitative approach that we developed for studying mechanics, which has been shown to be effective with students. A study of teachers who had not participated in the workshop shows that they had the same conceptual difficulties as their students. A comparison of pre‐ and post‐workshop questionnaires indicates that the participating teachers gained self‐confidence in their ability to explain everyday phenomena, changed their views about the relevance and interest of physics to the students and were willing to implement the method in their classes.     

一类常微分方程非零解的存在性

通过运用Morse理论获得了一类常微分方程非零解的存在性结果．