不正常航班恢复模型的贪婪模拟退火算法研究

为解决不正常航班恢复对航空公司带来的严重影响,研究了不正常航班恢复模型及其优化算法,对现有不正常航班恢复优化模型提出适当改进,重点设计了一种贪婪模拟退火算法。算法融合了GRASP和模拟退火算法的特点,提高了领域解的选择效率并且降低了陷入局部最优解的概率。实例证明这种算法可以处理大规模的不正常航班恢复问题,并且能够达到时间代价与结果质量的均衡。     

Longitudinal analysis of Chinese high school student’s stress in school and academic achievement

In previous research, few studies have examined the effects of adolescents’ stress in school on the change rates of their academic achievement. In the present study, we seek to examine the longitudinal relationships between adolescents’ stress in school and the change rates of their academic achievement. The results indicated that for those whose academic achievement significantly declined over time, the students’ stress from teacher–student interaction significantly predicted the change rates of their academic achievement. The findings provided support to the notion that stress was a risk factor in students’ academic development.     

陪都各界与台湾光复

抗战胜利后,台湾重新回到祖国怀抱,陪都各界功不可没。主要表现为国民政府适时地把收复台湾确定为重要国策,中共中央南方局热情帮助台湾同胞建立武装和统一组织,陪都台湾同胞踊跃参与国民政府接收台湾的各项具体准备事宜。除此之外,一些国际文化团体也竭尽所能让更多人知道中国政府和人民一定要收复台湾的意愿,一些重要媒体及时传出中国政府和人民决心收复台湾的强大声音。     

外语教学体验中心路由器的选购

为了合理选购路由器,介绍了对路由器的种类、硬件配置、功能、参数、协议、品牌、稳定性等诸多方面进行的系统研究。     

Electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an artificial anal sphincter system

This paper reports on the electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an artificial anal sphincter. The coupling coils and human tissues, including the skin, fat, muscle, liver, and blood, were considered. Specific absorption rate (SAR) and current density were analyzed by a finite-length solenoid model. First, SAR and current density as a function of frequency (10–10⁷ Hz) for an emission current of 1.5 A were calculated under different tissue thickness. Then relations between SAR, current density, and five types of tissues under each frequency were deduced. As a result, both the SAR and current density were below the basic restrictions of the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The results show that the analysis of these data is very important for developing the artificial anal sphincter system.     

Computational fluid dynamics simulation of formaldehyde emission characteristics and its experimental validation in environment chamber

We investigated the effect of supply air rate and temperature on formaldehyde emission characteristics in an environment chamber. A three-dimensional computational fluid dynamics （CFD） chamber model for simulating formaldehyde emission in twelve different cases was developed for obtaining formaldehyde concentration by the area-weighted average method. Laboratory experiments were conducted in an environment chamber to validate the simulation results of twelve different cases and the formaldehyde concentration was measured by continuous sampling. The results show that there was good agreement between the model prediction and the experimental values within 4.3% difference for each case. The CFD simulation results varied in the range from 0.21 mg/m3 to 0.94 mg/m3, and the measuring results in the range from 0.17 mg/m3 to 0.87 mg/m3. The variation trend of formaldehyde concentration with supply air rate and temperature variation for CFD simulation and experiment measuring was consistent. With the existence of steady formaldehyde emission sources, formaldehyde concentration generally increased with the increase of temperature, and it decreased with the increase of air supply rate. We also provided some reasonable suggestions to reduce formaldehyde concentration and to improve indoor air quality for newly decorated rooms.     

住房公积金利率管理研究

文章对住房公积金资金运行的重要工具——利率进行了初步的探讨,首次提出了住房公积金利率管理的五大原则,并对利率设计应考虑的社会经济和国家政策两个层面进行了多因素分析,列出了当前该领域存在的问题,给出了建立和完善富有弹性的利率形成和管理机制的政策建议。     

高职英语应用能力考试新思考

英语应用能力考试是为检测高职高专院校学生是否达到所规定的教学要求而设置的考试。本文就加大教学改革力度,更新教学观念,充分利用现代化教学手段,运用多媒体、语音室、网络等现代化资源,激发学生的学习兴趣,从而提升学生应用英语能力的过级率。     

基于C/S架构的Oracle数据库异地备份与恢复的研究

设计并实现了基于C/S架构的Oracle数据库异地备份与恢复系统。管理员可以通过局域网或广域网对远程数据库进行异地备份与恢复及保存。通过对备份文件进行压缩,减小了备份文件的大小,大大缩短了网络传输时间;通过加密,保障了异地备份数据的安全性和保密性。     

锅炉余热回收水处理技术探讨

烟气-水换热器换热方式是锅炉烟气余热回收的主要方式,这其中必然要求水的软化处理。本文介绍了阻垢剂在锅炉及换热器水处理方面的阻垢原理,并以硅磷晶为例,介绍了阻垢剂在用于锅炉余热回收水处理方面的防腐阻垢过程的工作机理。