学生本位视角下新建地方本科院校行政管理专业应用型人才培养探索——以重庆文理学院为例

应用型人才培养正成为我国高校教育的热点问题,新建地方本科院校在我国高校中数量最多。文章结合个案调查以行政管理专业为例,认为新建地方本科院校行政管理专业应用型人才培养的制约条件主要有学校品牌影响力弱、专业理论积淀不够、产学研用结合度差、实践条件极为欠缺四个方面,并分别从优势性差异化人才培养思路、灵活性师资引进政策、项目带动产学研用结合、改革专业实践方案四个方面提出针对性的对策建议。     

端子塑胶模具的一种改进方法

根据端子产品塑件的结构、技术要求,对生产过程中产生的造成产品不合格的表面气泡和长针歪斜等因素进行了分析和改进。     

Effect of liquid-solid ratio on the morphology,structure, conductivity,and electromagnetic characteristics of iron particles

Using a ball-milling technique, polymorphous iron particles were prepared by changing only the liquid-solid ratio λ. Effects of λ on their morphology, structure, conductivity, and electromagnetic properties were studied. The results show that an increase of λ from 0 to 0.25 causes a nonlinear decrease of the conductivity in the ranges of 88.50–2.25 S cm^?1 and a regular variation of the electromagnetic parameters, corresponding to the as-obtained iron particles. This is ascribed to a combination of the increased shape anisotropy and the decreased fresh surface with active atoms deriving from the weakened welding-on action and the enhanced micro-malleation action in the ball-milling process. Hereinto, the iron flakes formed at wet-milling with λ=0.08?0.25 have lower conductivity, higher permittivity and permeability, and more excellent absorption property compared with the irregular iron particles obtained at dry-milling with λ=0. It is a consequence of the synergistic effect of dielectric relaxation loss, exchange energy and conductance loss originating from the flake-shape structures. This indicates that the morphology, structure, conductivity, and electromagnetic properties of the products can be effectively controlled by changing λ.

     

亚表面缺陷的磁光/涡流成像检测技术研究

目前对精细表面下细小缺陷的无损探测已成为光电检测技术研究领域中的一项难题.根据法拉第电磁感应定律和磁光效应,提出了一种磁光/涡流成像技术,以实现对精细表面下细小缺陷的可视化实时无损检测.文章从基础理论着手,重点对磁光/涡流成像技术的光学系统、脉冲激励、图像采集处理等方面进行了创新和探索.     

设计传承中式生活之道——现代与传统的融糅

极具张力的景观设计 深圳近郊的一个青郁山谷中出现了一个新的住宅区。与许多高级住宅区的开发不同．这次．业主同意由当地的环境和文化背景主导设计愿景.该地区以岭南古典花园的雅致享誉全国。所以．易道环境景观设计有限公司的设计师们遵循古典花园的风格和含蓄的层次之美，创造出独树一帜的现代景观社区。     

真空吸具在球壳电子束焊接中的应用

通过分析球壳电子束焊接装卡的特点，巧妙运用真空吸具的优点，设计出一种快速、精确可靠的真空吸具辅助装卡系统，解决了长期以来球壳电子束焊接装卡找正难的问题。     

Entransy dissipation,entransy-dissipation-based thermal resistance and optimization of one-stream hybrid thermal network

The one-stream hybrid thermal network is analyzed and discussed based on the entransy theory,and the results are compared with those from the entropy generation optimization.The theoretical analysis indicates that the minimum heat-flow-weighted temperature of the thermal networks corresponds to the minimum entransy dissipation rate and the minimum thermal resistance.For a simple hybrid thermal network consisting of three thermal components,the expression of entransy dissipation is conducted,and the heat transfer area and the mass flow rate are calculated and optimized.The optimal results are obtained in order to minimize the entransy dissipation and the thermal resistance.The optimal results are calculated for various combinations,such as series connection,parallel connection and other hybrid connections.The numerical results are in accordance with the theoretical analysis.Both the theoretical analysis and the numerical results show that the minimum entransy dissipation and the minimum thermal resistance correspond to the minimum heat-flow-weighted temperature of the thermal networks while the minimum entropy generation does not.     

柴油机连杆杆身锻造出坯工艺优化

柴油机连杆是柴油机的最核心零件。其形状各不相同,但有一个共同点,就是连杆的毛坯截面积变化大,锻造毛坯时均需要出坯。不同的出坯方法有不同的优缺点。本文对几种连杆的锻造出坯形式进行了总结,并提出了一种连杆锻造出坯工艺优化方案。     

Synthesis and structure of NaNbO<Subscript>3</Subscript> ceramic powders in ultrahigh pressure field

The NaNbO3 powders were synthesized and their crystal structure changes were analyzed by ultrahigh pressure up to 6 GPa. The results indicate that the pure NaNbO3 powders can be synthesized at 300℃ under a pressure of 4 GPa, to significantly restrain the Na element volatilization compared with the traditional synthesis method. It is found that the crystal structure of synthesized NaNbO3 changes from low symmetry to high symmetry with the increase of the pressure.