孩子的来历与归属——神话传说背后的上古风习

一女娲是中国古代最著名的女神之一,其神奇之处一是治水,二是补天,三是造人。她的造人完全自力更生,无须外力,乃是典型的＂孤雌生殖＂。《太平御览》卷七十八引《风俗通》云：     

全面认识学习型社会 省级电大战略转型之基础

目前,全国各省电大系统进行战略转型、建立开放大学的探索与实践方兴未艾,如何选择正确的转型之路已成为重要的现实问题。本文在系统阐述学习型社会的形成发展、本质内涵、体系构架与实现途径的基础上,分析论述了发达国家创建学习型社会的关键步骤——确立终身学习理念与构建终身教育体系的问题。进而提出了对转型后陕西电大在全省终身教育体系中功能定位的初步思考。     

信息化评估理论方法的比较研究(上)

通过系统梳理国内外信息化评估理论和方法,得出不同时期人们对信息化评估的视角在变化,早期是以关注社会发展的特征为主,20世纪90年代中期开始围绕社会发展的需求,而近几年更关注“市场”发展趋势,其主要原因是现代信息技术革命对社会发展的冲击。指出,从宏观上看,信息化评估的方法与人们对该问题认识的视角密切相关,而从微观上分析,它还受社会发展需求的影响。本文是整篇的上半部分,主要系统梳理评估理论与方法的发展过程。     

加强行业自律关注媒体改革--全国新闻专业期刊、新闻媒体研究所业务交流会综述

由中国记协主办的2002年度全国新闻专业期刊、新闻媒体研究所业务交流会，于6月22日-23日在浙江嘉兴举行。这是在新传媒技术快速发展，传媒竞争日趋激烈，中国加入世贸组织的新形势下召开的一次全国性新闻业务交流会。来自中宣部新闻局和中央，地方新闻媒体的70多名代表就如何进一步自觉加强新闻行业自律，推动新闻事业的改革创新和发展，以良好的舆论氛围迎接党的十六大召开这一主题展开了热烈，深入的讨论。     

非齐次等式约束线性回归模型回归系数的广义条件岭估计

时非齐次等式约束线性回归模型回归系数提出广义条件岭估计.证明了在一定的条件下,在均方误差矩阵、均方误差及广义均方误差意义下,广义条件岭估计都优于约束最小二乘估计和狭义条件岭估计.     

RRM1 gene expression in peripheral blood is predictive of shorter survival in Chinese patients with advanced non-small-cell lung cancer treated by gemcitabine and platinum

Objective  

To evaluate the predictive values of gene expressions of ribonucleotide reductase M1 (RRM1) and breast cancer susceptibility gene 1 (BRCA1) in peripheral blood from Chinese patients with non-small-cell lung cancer (NSCLC) treated with gemcitabine plus platinum.     

《文选》中潘岳赋六首释证

《文选》中录入了8首潘岳赋.其中《藉田赋》和《射雉赋》分别反映了潘岳青年时期扬才露己及无忧无虑的思想;《秋兴赋》反映了其处于官场斗争中的归隐思想;《怀旧赋》中有一些疑点值得重新阐释;《寡妇赋》是模仿前人的同题之作;《笙赋》则是《文选》音乐赋中的推陈出新之作.     

独立学院学生英语学习动机的培养研究

动机在大学英语学习的过程及学习效果方面起着重要的作用。为了提高语言学习的效率,帮助学生树立语言学习目标,激发其积极的学习信心和学习动机,独立学院英语教师应该了解学生不同的学习特点和影响学生学习动机的因素,并加强培养学生的学习动机。     

Corresponding drivability control and energy control strategy in uninterrupted multi-speed mining trucks

An hybrid uninterrupted multi-speed transmission (HUMST), based on the integration of a planetary gear set and a 3-speed automatic manual transmission (3-AMT), is developed to satisfy the specific performance indexes of mining trucks. The power-split device can alleviate and eliminate the inherent torque interruption of the 3-AMT during gear shift by implementing the designed cooperative shift control strategy which is optimized by quadratic performance index. In order to achieve fast torque coordination while guaranteeing the driving comfort performance, the torque profiles of the power split device and the traction motor are optimized by Linear-quadratic regulator (LQR) algorithm. Dynamic programming (DP) is implemented as a benchmark to demonstrate the maximum fuel efficiency of the proposed HUMST. Because of the high computational cost of optimal control strategies such as DP, an improved real-time control strategy (IRTCS) using modified Gaussian distribution function is proposed to significantly reduce the computing load. As efficiency-oriented energy control strategy would result in frequent gear shifts, to achieve a desirable tradeoff between the overall efficiency and the shift stability, multi-objective genetic algorithm (MGA) is integrated to optimize the overall performance. The detail mathematical and dynamic model shows that the proposed shifting strategy with LQR can effectively suppress shift jerk, and the proposed IRTCS with MGA can reduce shift frequency by 70.78% to improve the drivability, only sacrificing 4.86% of overall efficiency compared to that of DP.