UAV-assisted data collection for wireless sensor networks with dynamic working modes

Wireless Sensor Network(WSN)is a cornerstone of Internet of Things(IoT)and has rich application scenarios.In this work,we consider a heterogeneous WSN whose sensor nodes have a diversity in their Residual Energy(RE).In this work,to protect the sensor nodes with low RE,we investigate dynamic working modes for sensor nodes which are determined by their RE and an introduced energy threshold.Besides,we employ an Unmanned Aerial Vehicle(UAV)to collect the stored data from the heterogeneous WSN.We aim to jointly optimize the cluster head selection,energy threshold and sensor nodes’working mode to minimize the weighted sum of energy con-sumption from the WSN and UAV,subject to the data collection rate constraint.To this end,we propose an efficient search method to search for an optimal energy threshold,and develop a penalty-based successive convex approximation algorithm to select the cluster heads.Then we present a low-complexity iterative approach to solve the joint optimization problem and discuss the implementation procedure.Numerical results justify that our proposed approach is able to reduce the energy consumption of the sensor nodes with low RE significantly and also saves energy for the whole WSN.

Theoretical and numerical analysis of coal dust separated by centrifugal force for working and heading faces

In order to meet engineering needs of Chinese underground coal mines,a new dust-collecting fan,a device of dust separated by centrifugal force in driven cyclone passageway(DCCP)was designed.In centrifugal dust removal section(CDRS)of DCCP,a general equation is derived from the principle of force equilibrium.According to CDRS structure parameters and fan running parameters,the general equation is simplified,and the simplest equation is calculated numerically by MATLAB.The calculation results illustrate that increasing quantity of air current is against dust removal,but it is beneficial to dust removal by increasing the radius of driven spiral blade and increasing the particle diameter of coal dust.The conclusions show that the dust-collecting structure parameters coupled with the fan running parameters is a novel optimization approach to dust-collection fan for working and heading faces,which is especially suitable for Chinese underground mines.

Research on the dynamic response of connecting rod bearing bush wear of reciprocating machine under variable working conditions

As a type of reciprocating machine, the reciprocating compressor has a compact structure and many excitation sources.Once the small end bearing of the connecting rod is worn, it is easy to cause the sintering of the bearing and the abnormal vibration of the body.Based on the characteristics of poor lubrication state and complex force of connecting rod small head bearing, a mixed lubrication model considering oil groove feed was established, and the dynamic simulation of the reciprocating compressor model with lubricated bearings was carried out;considering different speeds and gas load conditions, the law of the impact of the eigenvalues changing with working conditions was explored.The fault simulation experiment was carried out by selecting representative working conditions, which verified the correctness of the simulation method.The study found that two contact collisions between the pin and the bearing bush occurred in one cycle, the collision impact was more severe under the wear fault, and the existence of the gap made the dynamic response more sensitive to the change of working conditions.This research provides ideas for the location and feature extraction of fault symptom signal angular segments in the process of complex measured signal processing.

The Effects of Work Ethics, Transformational and Transactional Leadership on Work Performance of Teachers

Teacher performance is an important factor to improve education performance. This study aimed to analyze the effect of the work ethics, transformational, and transactional leadership style on teacher performance. The experiment was conducted in public high school No. 112 Jakarta. A total of 50 teachers were included as samples, where they were given the questionnaires to be filled by self-rating. Data were analyzed with multiple linear regression model and processed with SPSS version 20. Results showed that transformational leadership, transactional leadership and work ethics have positive and significant impacts on teacher performance both simultaneously and individually.

Relationship Between Work Stress and Mental Health of Middle School Teachers in Guangzhou

This study mainly discusses the relationship between middle school teachers’mental health and work stress in Guangzhou.This study uses questionnaire survey method to examine 237 teachers in Guangzhou,and adopts SPSS26.0 to conduct independent sample t-test,ANOVA,correlation analysis,and regression analysis to draw the conclusion.The results show that:(1)The work pressure of middle school teachers in Guangzhou is above the medium level,and their mental health is at the middle level.(2)Under the influence of different gender,position,age,teaching years,and teaching objects,the pressure of middle school teachers is different.(3)There is a significant positive correlation between teachers’work stress and the dimensions of self-confidence loss and social dysfunction of mental health.(4)Work stress can effectively predict the level of mental health.Therefore,we need to understand the pressure sources of middle school teachers to develop measures to alleviate the pressure of teachers and improve the mental health of middle school teachers.

Why Did the Reform Fail?The Impact of the Personnel System Reform on Teachers in Jia County of China

Over recent years,the reform-driven development of education has been one primary idea of the Chinese government under the leadership of Xi Jinping.Above all,the reform of the personnel system,closely related to the interests of teachers,becomes the most sensitive link in the educational reform.To root out the restriction of education system on teachers and enhance their enthusiasm for work,Jia County carried out a reform of teacher personnel system from 2013 to 2016,including breaking the hierarchical restriction on teachers’administrative promotion,decentralizing the power of confirming the teachers’professional titles,eliminating the teachers with the worst performances,practicing performance salary,and other measures.In this study,we tracked 627 teachers regarding their work enthusiasm and stress during the three-year reform,analyzed the data through the Hierarchical Linear Model(HLM),and found that:(1)The teachers’enthusiasm for work increased over time,but did not significantly change with the consideration of the influence of the principals’leadership in teaching.The personnel system reform aiming at motivating teachers failed to work as expected.(2)The teachers’work stress still increased year by year.Therefore,this study concludes that the reform in Jia County failed to fulfill its goals and that the vigorous top-down reform did not lead to ideal results.A reason might be that the reform damaged the vested interests of teachers who represent the deep-rooted nepotism typically in the Chinese education community.Reforms of educational personnel system should give schools a full play regarding educational governance in the future.

Teacher's Role in Students'Group Work in College English Classroom

The implementation of group work in China is aroused by the teaching reform and proposal of the New Curriculum Standard, in order to improve the language teaching and learning. However, in many cases group work is far less effective and desirable than it should have been. The effectiveness of group work depends on many factors in real language classroom setting. This paper mainly focuses on the factor of teacher's role. The main implication of this paper is to suggest the appropriate teacher role in students'group work and put forward some skills in organizing group work in order to make group work more effective and significant.

班主任任职意愿及其影响因素:基于心理感受与工作嵌入视角的综合分析

吸引优秀教师担任班主任是当前中小学教师队伍建设中的重要议题。通过对北京市A区1567名中小学教师的调查发现:教师的班主任任职意愿偏低,58.9%的教师不愿意担任班主任;相对而言,城镇教师、低学历教师、高职称教师以及高中教师等亚群体的班主任任职意愿更低;影响班主任任职意愿的因素复杂多样,职业承诺、匹配和牺牲具有显著的正向预测效应,其夏普利分解值贡献率居于前三位。要提高教师的班主任任职意愿,可考虑采取如下举措:加强班主任人力资源开发,优先关注重点人群;改善班主任工作设计,提高班主任岗位本身的吸引力;进一步推动绩效工资改革,加大向班主任的倾斜力度。

新时代高校教师党支部在课程思政中发挥作用的机制研究

课程思政是高校思政育人的重要途径,是实现高校立德树人根本任务的重要环节。但在课程思政建设过程中,仍然存在一定的问题和困难,主要体现在广大任课教师群体上。教师党支部是新时代高校的基层组织,具有引领和推动课程思政高质量建设的责任。首先,分析高校开展课程思政的问题和苦难;其次,分析党支部在引领和推进课程思政建设中应发挥的作用;最后,根据教师党支部和课程思政建设的实际情况,提出“以学促建”“以带促建”“以评促建”和“以查促建”四种教师党支部发挥作用的机制,真正实现党支部引领和推动课程思政的建设和发展。

学科多元化班主任团队建设的困境及实践路径

班主任是班级工作的组织者和指导者,在学校教育和班级管理中占有举足轻重的地位。建设学科多元化班主任团队有利于提升班主任的综合育人能力,促进学生全面发展;发挥个人优势,促进特色班集体发展;帮助班主任自我反思,促进个体和群体的专业化发展。但现阶段,班主任团队存在目标不清晰、专业能力不足、合作不充分的困境。为解决这些困境,建设学科多元化班主任团队应明确班主任团队共同目标,规范团队的组织管理;健全班主任培养体系,促进班主任团队专业发展;营造多学科协作文化,加强班主任团队交流合作。

党建引领与学科建设深度融合的高校“双一流”教师基层党支部创新模式探讨

高校党建工作与学科建设融合是指将党的建设工作与高校的学科、教学、科研、管理等相结合,实现党建工作与高校发展的有机统一。依托全国高校党建样板支部建设,以教育强国、科技强国、交通强国为指引,打造支部党建工作品牌。由此形成了一条适合自身学科特色、教师支部特点、高校党建特征的党建工作与学科建设深度融合的“党建+学科、教学、科研、社会服务”的发展之路。以党建工作为引领,促进一流学科建设,带动教师队伍发展,奠定了为党育人、为国育才的教师队伍基础。

高校教师党支部党建引领“三全育人”实施路径探索

高校党建工作与思想政治工作是实现立德树人任务的重要内容和重要途径,但党建与业务工作、思想工作的融合是一个难点问题。高校教工党支部作为高校基层党组织联系广大教职工和师生的纽带和桥梁,在党的教育事业中发挥着重要作用。支部党员教师的双重身份要求其既承担党建与业务工作,又肩负学生思想政治教育责任。该文从立德树人根本任务出发,结合当代大学生的特点和新时代党建要求,挖掘教师党支部在“三全育人”中的党建引领不足,探索构建协同育人机制,发挥教师党支部的“三全育人”功能,服务高校学科建设、人才培养工作。

师风与师德治理

教师的职业道德不能简单地以师德规范进行判定,师德规范背后还有更高的价值,即师风。师风决定于教育的本质和职能。根据教育在农业文明、工业文明和信息文明的不同职能,提炼出了为人师表、传道授业、指引促进这三个迭代融合的师风。依据师风进行师德评判可以使师德治理跟教育本质保持一致性,否则,师德治理就容易流于道德实在论,将师德规范仅仅看作外在权威的强制性“要求”,而不是教师职业成长的“需要”;评价师德行为也会倾向于根据规范的字面意思而不是它的精神实质,或依据行为的结果而不是动机。有了师风,师德治理会赋予教师无限的创造空间,使教师在更高层次上体现教育家精神。

校本教师发展:教师发展方式的一次深刻转型——基于教师自主生长理论的思考

校本教师发展旨在改革学校组织结构及教学、科研、校本研修、课程开发、学校文化等活动,让教师主动面对真实的教育教学情境,依托学校自身的资源开展校本学习,在解决实际问题的过程中促成教师成长。其关注范围更广大更人本,活动主题更明确,发展方式更灵活,管理措施更“综合”,其实质是“工作赋能教师发展”,这是教师发展方式的一次深刻转型。普通中小学开展校本教师发展急需解决的主要问题是学校组织的“再造”、教师学习方式的“更新”与校本教师发展教育者的“创设”。

中学教师工作-家庭冲突对其教学效能感的影响:道德情感的中介作用

为了探讨中学教师道德情感在工作-家庭冲突对教学效能感影响过程中的作用机制,采用工作-家庭冲突量表、教学效能感量表和教师道德情感量表并以方便抽样方式选取537名中学教师实施问卷调查。结果显示:中学教师工作-家庭冲突能显著负向预测教学效能感和道德情感,中学教师道德情感能显著正向预测教学效能感;中学教师工作-家庭冲突不仅可以直接影响教学效能感,而且可以通过道德情感的中介作用间接影响教学效能感。因此,建议通过帮助中学教师树立家庭与工作边界意识,缓解中学教师心理压力,培育积极情绪及加强教师职业素养教育等途径,改善中学教师工作-家庭冲突导致的负面影响,提升其道德情感水平,从而增强其教学效能感。

幼儿园教师情绪智力与职业幸福感的关系:工作投入的中介作用

为探讨幼儿园教师情绪智力与工作投入与其职业幸福感的关系,以河北省各市1874名幼儿园教师为对象开展问卷调查。结果发现,幼儿园教师的职业幸福感整体呈中等偏上水平。其中,人口学变量方面的具体特点为:教龄越长,幼儿园教师的职业幸福感得分越高;随着教育水平的提高,幼儿园教师的职业幸福感有所下降;收入和编制只能影响幼儿园教师职业幸福感的某些方面;配班教师和园长的职业幸福感显著高于主班教师和年级组长;农村幼儿园教师职业幸福感最高,其次是城市和区县幼儿园教师;示范幼儿园教师职业幸福感显著高于一、二、三级幼儿园教师。幼儿园教师的职业幸福感、情绪智力以及工作投入之间均呈显著正相关关系,情绪智力中的情绪管理、情绪运用和他人情绪评估3个维度都能十分显著地正向预测其职业幸福感;工作投入在情绪智力和职业幸福感之间起部分中介作用。为了更好地提升幼儿园教师的幸福感,应当关注他们的薪资待遇,确保他们得到应有的回报;应当公平对待幼儿园教师并为他们提供培训机会;同时应注意均衡幼儿园教师的工作投入,提高其职业幸福感水平。

国际视野下我国中小学教师固定与灵活工时结合制探究

非教学工时过长是各国中小学教师负担表面成因,而相对固定的“八小时五天工作制”是其深层根源所在。精减相对固定的学校常规工作时间并构建灵活可选择的创新工作时间,形成固定与灵活工时结合制工作模式,是减轻教师负担的关键。文章基于常规工时与兼职工时国际数据,论述了我国实行中小学教师“4+(1+1)”四天固定与两天灵活工时结合制的合理性,分析了结合制的关键是“师资—课程—生源”在固定与灵活时间之间延续且异质组合,并探讨了结合制的第二方案,即“6(6.5)+(1.5+1.5)小时”固定与灵活工时结合制的国际适用性。这种创新的工时制对于促进教师减负性发展具有重要意义。

高职班主任德育实践路径的优化

高职院校承担着为社会培养高素质技术技能型人才的重任,因此必须把德育工作放在首位,使培养的学生不仅掌握扎实的专业技能,还具备良好的职业道德,以满足各类企业的需求。在德育实施的过程中,班主任是主要组织者和参与者,但由于受到传统教育理念的影响,仍存在德育工作重视不够、德育能力有待提升等问题。在对高职班主任德育工作的重要性及其现状分析的基础上,探究德育工作实践路径优化策略,旨在为高职德育工作的有效开展提供参考。