工程测量技术专业校企合作式实验实训基地建设

高职高专工程测量技术专业是实践性非常强的专业,实训基地建设是职业技术教育的物质基础,利用实验实训基地对学生进行生产第一线的现场实训,是提高工程测量技术专业学生技能的最有效途径。建立多个长期校企合作式的实验实训基地是一个值得探讨的问题。     

地方高校服务区域经济发展之路探究——以大连大学的发展为例

地方高校承担着为地方经济建设与社会发展需要培养大批各类人才、服务区域经济和社会、促进地方小康社会全面建设的重任,系统地研究地方高校发展是地方高校自身发展和为社会服务的迫切需要,探索一条行之有效的服务于区域经济发展道路是当前地方高校发展的迫切需要。     

电动叉车驱动机构的设计改进

对2吨位电动叉车的驱动装置进行了结构设计改进,取消了独立的减速装置而将其功能分配到齿轮传动系统中,改进后的设计具有结构紧凑、传动效率高等特点．通过COSMOSWorks有限元分析实例解析,证明驱动机构的结构强度和刚性满足设计要求．     

垃圾焚烧发电厂燃烧控制及环保排放的研究

我国垃圾水分大、热值低、灰分大、成分复杂,焚烧炉燃烧控制不可控因素多,结合TIF-CFB特点,从垃圾品质、助燃煤成分、过量空气系数、负荷变化等参数分析影响垃圾燃烧稳定性的因素,对垃圾焚烧中产生的二恶英、重金属、酸性气体、固体废物等进行解析利于有针对性地防治,可实现垃圾发电最大的环境效益。     

Patriotism,Pressure, and Place: Civic Agency in Base Country

This article focuses on how civic agency is taught or not taught by a social studies teacher to the children of soldiers in a largely conservative community and, as a result, how it was learned or not learned. Taken from a larger study investigating individual teacher curricular and pedagogic choice around teaching war near a military base, this article examines the sociopolitical, district-level, student, parent, and community pressures and tensions of teaching war in this context and what impact these pressures have on teaching choice and student sense of civic agency. Findings suggest that the teacher, mostly yielding to the pressure and stress, avoids complexity of perceived dangerous content, which left most students with an unchallenged sense of traditional patriotism and duty.     

纳米材料的研究进展

由于纳米微粒的小尺寸效应、表面效应、量子尺寸效应和宏观量子隧道效应等使得它们在磁、光、电、敏感等方面呈现常规材料不具备的特性,因此其在磁性材料、光学材料、电子材料以及高致密度材料的烧结、传感、催化、陶瓷增韧等方面有广阔的应用前景,目前研究者颇多.本文主要从纳米材料制备与表征的方法以及纳米材料的应用方面总结了近几年来纳米材料的研究进展.     

中国城镇化与资源环境承载力耦合关系研究

运用耦合度和耦合协调度模型,研究了全国及各省区城镇化与资源环境承载力的耦合关系,得出如下结论:第一,全国及大部分省区城镇化水平超出资源环境的承载水平,资源环境承载力对城镇化的支撑能力有限;第二,全国及各省区城镇化与资源环境承载力处于拮抗阶段,二者的相互作用关系比较剧烈,既存在胁迫效应,也存在约束作用;第三,城镇化与资源环境承载力耦合协调度呈现东部>西部>中部的空间格局,全国属于轻度失调型,大部分省区属于轻度和中度失调型。提出如下对策建议:在新常态下推进城镇化适度适速发展、创新“土地红利”模式;以生态文明建设为契机实现资源可持续利用、加强环境污染治理、构筑生态安全屏障。     

When Diversity Training Goes Wrong: A Case Study Analysis of the University of Delaware Residential Education Program

In an increasingly global and interconnected world, it is necessary for corporations and educational systems to develop mechanisms for community members to enhance multicultural competencies related to diversity including race, ethnicity, gender and gender identity, sexual orientation, age, religion, and the like. Some people internalize anger, fear, contempt, and guilt about these issues. As a result, people express their feelings in unhealthy and unproductive ways in school and in the workplace. The solution often is to provide diversity training or sensitivity training. This case study analysis utilizes Kaufman's systemic thinking model to examine what went wrong when one university attempted to implement a yearlong intensive diversity training program that brought national media attention and a potential lawsuit against the university, ultimately resulting in a dramatic shift in the university's out‐of‐classroom experiential learning policies.     

Superconductivity in chromium nitrides Pr3Cr10-xN11 with strong electron correlations

Exploration of superconductivity in Cr-based compounds has attracted considerable interest because only a few Cr-based superconductors (CrAs, A₂Cr₃As₃ and ACr₃As₃ (A = K, Rb, Cs, Na)) have been discovered so far and they show an unconventional pairing mechanism. We report the discovery of bulk superconductivity at 5.25 K in chromium nitride in Pr₃Cr_10-xN₁₁ with a cubic lattice structure. A relatively large upper critical field of H_c2(0) ∼ 12.6 T is determined, which is larger than the estimated Pauli-paramagnetic pair-breaking magnetic field. The material has a large electronic specific-heat coefficient of 170 mJ K⁻² mol⁻¹—about 10 times larger than that estimated by the electronic structure calculation, which suggests that correlations between 3d electrons are very strong in Pr₃Cr_10-xN₁₁, and thus quantum fluctuations might be involved. Electronic structure calculations show that the density of states at the Fermi energy are contributed predominantly by Cr 3d electrons, implying that the superconductivity results mainly from the condensation of Cr 3d electrons. Pr₃Cr_10-xN₁₁ represents a rare example of possible unconventional superconductivity emerging in a 3D system with strong electron correlations. Nevertheless, clarification of the specific pairing symmetry needs more investigation.