对比语言学视角下的日语教学

对于中国的学生,日语的学习中存在很多影响因素,单纯学习语言,不能将学习过程中产生的负迁移转化为正迁移。而在日语教学过程中,导入中日语言对比教学模式,从语音、词汇、语法、语用四方面进行对比分析,可以体现对比教学这种模式与日语教学的关系以及所起到的作用。     

Liquefied natural gas importing security strategy considering multi-factor: A multi-objective programming approach

LNG importing strategies, in the literature, are primarily studied under a common single-factor framework. However, LNG importing strategies are affected by a variety of factors. To address this existing gap, this paper proposes a Multi-Objective Programming model, which takes into account the cost, the country risk, the shipping risk, and the impact of extreme events. A pure structural change model is used to determine the risk impact coefficient for extreme events. An enhanced Simulated Annealing Algorithm is then used to solve the LNG-importing optimization problem. An experimental study is further conducted to verify the practicability of the proposed approach in the case of China's LNG-importing data. The software implementation of the proposed model is developed in Python. The proposed model provides a decision support tool for LNG importing companies to find an efficient portfolio strategy for LNG importing. The optimization model can be used for analyzing similar scenarios involving such dimensions as economy, energy security, and especially energy diversification.     

电动汽车非车载快速充电系统

为了满足电动汽车快速充电需求,设计了一款大功率非车载电动汽车充电系统.系统采用较为先进数字控制技术、电力电子器件、控制部件、PWM控制方法、参数与积分分离相结合的PI算法,并附加各种控制、保护和通讯电路,实现电动汽车的智能充电功能,并达到了输出大电流、高电压的技术指标,满足了电动汽车的快速充电要求,对电动汽车的普及具有一定的推动作用.     

计算机基础教学改革探索与实践

针对目前高校非计算机专业计算机基础课以教师为主体的教学过程中存在的问题,结合高校教学改革的培养目标和自身教学实践,提出面向学生的教学方法。该方法从学生角度出发,综合考虑学生差异,应用多种教学手段,合理设置上机实践,同时完善考核机制,以激发学生的学习兴趣和积极性,培养学生自主学习的能力,通过多方面改进,达到提高教学效果的目的。     

Shaping of 3YSZ porous substrates for oxygen separation membranes

In recent years, asymmetric membranes based on mixed ionic-electronic conductors (MIEC) have gained importance in practical gas separations. MIEC ceramic materials show high-energy efficiency and high-temperature resistance, which allows direct integration in industrial processes. Thin layers are supported on porous substrates that provide mechanical strength. In the asymmetric membrane manufacture, the control of support porosity and microstructure is crucial. Colloidal processing is an interesting method that allows controlling the final microstructure in both surfaces and bulk, with high reproducibility. Here, the development of asymmetric membranes with a top functional layer made of Ce_0.8Gd_0.2O_1.9/Ni₂FeO₄ composite is presented and aims to maximize oxygen permeation and membrane robustness. The porous substrate is prepared by slip casting while the functional layers by screen-printing. The effect of pore former volume and particle morphology were studied. The combination of spherical and flake-like PMMA particles enabled to generate open porosity suitable for fast gas transport.     

基于DECE算法的蓝牙通讯加密

本文在分析蓝牙通讯加密技术缺陷的基础上,提出了DECE通讯加密算法,使得蓝牙对于数据通讯的保密性得到了强化。该算法也可用于网络中的嵌入式设备。     

基于Verilog HDL的逻辑分析仪电路设计

本文设计的是一个基于Verilog HDL的简易逻辑分析仪电路,在满足触发条件时,对被测信号进行采集、存储、并在示波器上显示所采集到的信号波形和时间标志线。在该逻辑分析仪电路中,所有信号都与时间相关,从而可以观察到时间的设置与保持、脉冲宽度、外部丢失的数据关系、也能够帮助我们实施数字硬件故障检测。     

求解0-1背包问题的混沌遗传算法

提出一种改进的混沌遗传算法来求解0-1背包问题。通过利用幂函数载波技术增强混沌搜索的遍历性,把混沌搜索得到的最优解直接作为新群体嵌入遗传算法来改善遗传算法的早熟问题,从而使算法有能力避免陷入局部极值而快速收敛于全局最优解。仿真实验结果表明了该算法求解0-1背包问题的有效性和适用性。     

各向异性导电胶膜的导电粒子电性能研究

各向异性导电胶膜(ACF)连接线路的导电性能对导电粒子的变形影响很大.对ACF粘接后的导电粒子电阻进行了理论模型的建立,分析了导电粒子变形程度对其导电电阻的影响,并与实验结果进行了比较,吻合很好;在高温、高湿环境下,通过对导电粒子回弹进行有限元模拟,得到了导电粒子回弹量;并分析了回弹粒子对导电电阻的影响以及导电粒子的数量对总电阻的影响,得到了各向异性导电胶膜连接的线路最佳的导电粒子变形量和湿热环境对其的导电性能的影响程度.     

基于嵌入式系统的电力设备紫外监测系统设计

设计主要目的旨在解决电力设备的人为检测的麻烦、不安全,为此引入基于嵌入式计算机系统开发与紫外内窥检测技术相结合的智能检测应用。设计了一套基于嵌入式系统的电力设备紫外监测系统,该系统核心部分主要由紫外探头、嵌入式计算机系统和GPRS模块构成。利用日盲型的紫外传感器检测特定波长的紫外线来正确检测电力设备的放电,并将紫外放电检测和视频内窥技术相结和实现了基于无线GPRS的电力设备紫外放电的远程实时在线监测,最终监控数据通过嵌入式计算机系统处理利用GPRS模块通信网络将信息反馈给工作人员做处理。