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Search Results: 1 - 10 of 248917 matches for " 李仪 "
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Er离子注入多孔硅的发光

科学通报 , 1995,
Abstract: 硅是最重要的半导体材料,在微电子领域有着广泛的应用.室温下硅的禁带宽度为1.11 eV,相应的发光波长为1.14μm.在近红外波段,硅是间接带材料,发光效率很低,无法在光电子领域实际应用.近年来,人们用稀土离子Er掺入硅中,获得了Er~(3+)离子在1.54μm的近红外发光.这正是光纤传输的最低损耗波段.在掺Er的硅基材料上能否获得有实用功率的发光或激光器件,人们对此表现了极大兴趣.然而,理论评估表明前景不容乐
Er离子注入多孔硅的发光

科学通报 , 1995,
Abstract: 硅是最重要的半导体材料,在微电子领域有着广泛的应用.室温下硅的禁带宽度为1.11eV,相应的发光波长为1.14μm.在近红外波段,硅是间接带材料,发光效率很低,无法在光电子领域实际应用.近年来,人们用稀土离子Er掺入硅中,获得了Er~(3+)离子在1.54μm的近红外发光.这正是光纤传输的最低损耗波段.在掺Er的硅基材料上能否获得有实用功率的发光或激光器件,人们对此表现了极大兴趣.然而,理论评估表明前景不容乐
初中生受欺负对抑郁的影响——自尊的中介作用
The Impact of Victimization on Depression among Middle School Students: The Mediating Effect of Self-Esteem
 [PDF]

亚婧,
Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.68112
Abstract:
目的:探讨初中生受欺负、抑郁、自尊三者之间的关系以及自尊在初中生受欺负和抑郁之间的中介效应。方法:采用儿童欺负问卷(中学版)、自尊量表(SES)和儿童抑郁调查量表(CDI),对银川市400名初一年级的学生进行问卷调查,将调查数据输入SPSS进行处理,研究受欺负、自尊和抑郁三者的关系。结果:受欺负与抑郁呈现显著正相关(p < 0.01);受欺负与自尊之间呈显著负相关(p < 0.01);抑郁与自尊呈显著负相关(p < 0.01)。自尊在受欺负与抑郁之间有部分中介效应。初中生受欺负程度对抑郁有预测作用。结论:自尊在受欺负和抑郁间有部分中介作用,受欺负通过自尊的部分中介效应对抑郁产生作用。
Objective: To explore the mediating effect of self-esteem on relationships between victimization and depression among junior middle school students. Methods: A total of 400 pupils of grade one from middle school were investigated by using Olweus’ Bully/Victim Questionnaire (middle school edition), Self-Esteem Scale (SES) and Children’s Depression Inventory (CDI). All the data were analyzed with SPSS. And we investigate the relationship among depression, self-esteem and victi-mization. Result: There was significantly positive correlation between victimization and depression (p < 0.01); victimization was significantly negatively correlated with self-esteem (p < 0.01); and the degree of self-esteem was significantly negatively correlated with that of depression (p < 0.01). The self-esteem partly mediated the path of victimization to depression. The victimization could predict depression and self-esteem. Conclusion: Self-esteem was a significant partly mediator between victimization and depression. Victimization could influence depression significantly through self-esteem as a partly mediator.
网络暴力游戏与中学生暴力行为的相关研究
Relativity between Junior School Student Behavior and Online Violent PC Games
 [PDF]

, 亚婧
Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.69122
Abstract:
暴力行为是个人身心健康发展的影响因素之一,对家庭、社会和谐有很大程度的影响。本研究以在校中学生为研究对象,采用抽样调查的方法,旨在探讨网络暴力游戏和中学生暴力行为的相关,以便发现有暴力行为的人群具有的共性特点,利于提出有效且具有建设性的治疗方案。研究验证与发现:(1) 玩网络暴力游戏会改变人们对暴力行为的看法,且影响是长期的、潜移默化的;(2) 无论在网络世界还是在现实世界,中学生对网络游戏的模仿不具普遍现象;(3) 网络暴力游戏与中学生暴力行为有一定的相关,但“暴力”表现的方式并不相同;(4) 网络暴力游戏对中学生的暴力赞成程度及暴力情绪有明显的预测作用。
Violence is one of the factors affecting the personal health of body and mind development which has a great influence on the family and social harmony. Taking the middle school students of this study as the research object, study using the method of sampling survey, aims to explore the correlation of the violent behavior of the middle school students, in order to find the common characteristics of people with violence, to put forward effective and constructive treatment plan. The validation and found that: (1) Playing violent games will change the way people view of violence; the impact is long-term and subtle. (2) Both in the network world and in the real world, the middle school students imitations of online game is not a common phenomenon. (3) Network of violent games and middle students’ violent behavior related to a certain extent, but the “violence” is not the same performance. (4) Online violent game has a significant predictive effect on middle school students' violence in favor of violence and violence emotion.
一氧化氮合酶途径参与SO2胁迫下蚕豆气孔运动调节
,慧兰,
环境科学学报 , 2015,
Abstract: 以蚕豆为材料,研究一氧化氮合酶(NOS)途径在SO2诱发气孔运动中的作用.研究发现:浓度7.5~200μmol·L-1的SO2衍生物处理后,蚕豆叶面气孔开度减小,气孔开度与SO2衍生物浓度呈负相关;SO2衍生物处理组叶组织中NOS活性增强;加入NO清除剂c-PTIO或NOS抑制剂L-NAME可抑制SO2衍生物诱发的气孔关闭;SO2衍生物处理组保卫细胞内NO和Ca2+水平升高,用c-PTIO降低胞内NO水平后Ca2+水平随之下降.结果表明,SO2衍生物胁迫可诱发保卫细胞内NO合成增加,NO通过调节胞内Ca2+水平升高,激活下游信号转导途径,调节气孔运动;NOS途径介导的NO合成参与了SO2胁迫下蚕豆气孔运动的调节.
Poincaré引力规范场和1/2自旋粒子的运动

物理学报 , 1981,
Abstract: 木文以Poinaré群作为引力规范群,在有挠率和曲率的空间中,讨论了当引力拉氏量包含场强的线性项与二次项时体系的运动方程,指出球对称真空静引力场方程在“宏观”极限下可以得到Schwarzchild解,因此它与目前关于广义相对论的实验验证是一致的,但在“微观”极限下,方程预示着一种新的短程作用,讨论了自旋1/2的粒子作为检测粒子在这种球对称真空静场中的运动,指出运动方程只与仿射联络的黎曼部分有关,并和广义相对论的相应方程具有同样的形式。
Development of Workflow Definition Tool for Office Automation System
办公自动化中流程定义工具的开发


计算机系统应用 , 2007,
Abstract: 工作流系统是办公自动化系统中的重要组件,而流程定义则是工作流系统所有活动的基础,在工作流系统中占有非常重要的地位.论文以某通信公司的办公自动化系统为背景,从体系结构、系统功能和设计思想等方面对其中的流程定义工具进行了分析,最后,给出了该流程定义工具的运行结果.
我国的人口重心及其移动轨迹

人口研究 , 1983,
Abstract: ?<正>一、人口重心及其移动轨迹的概念和计测原理我国人口的地区分布很不均衡。内蒙、新疆、青海、西藏四省区面积约占全国总面积的半,人口只占全国人口的3.73%;其余26个省区面积也占全国的一半,而人口却占全国的96.27%。这只是一个粗略的描述。怎样才能更精确地反映人口分布状况及其变化呢?人口重心就是测定人口分布状况的一个很有用的指标。测定和描绘我国1912至1978年的人口重心及其移动轨迹,可确切并形象地看出七十年来我国人口分布的变化过程。
基于数据挖掘的低品位油藏经营评价指标分析
The Analysis of Evaluation Index of Low-Grade Reservoir Operation Based on Data Mining
 [PDF]

, 王丹, 晴晴, 赵娇
Hans Journal of Data Mining (HJDM) , 2014, DOI: 10.12677/HJDM.2014.44005
Abstract:
本文针对高效经营未开发低品位油藏是我国石油行业即将面临的迫切任务情况,综合使用油藏经营思想、经济评价的分析方法和多种数据挖掘方法,提出了建立未开发低品位不同油藏经营效益评价的指标体系方法。通过大量实例统计研究,确定了低渗透和稠油未开发低品位油藏经营效益评价的指标体系。建立的未开发低品位不同类型油藏经营效益评价的指标体系可为油田企业评价该类油藏的经营效益,进而制定经营这些油藏的最佳方案奠定基础。
With the situation which operating efficiently untapped low-grade reservoirs is a urgent mission for our petroleum industry to execute, this paper presents the method to construct index system on benefit evaluation of untapped low-grade reservoir operation by using comprehensively the idea of reservoir operation, the analysis method of economic evaluation and multiple methods of data mining. Through a lot of case studies, the benefit evaluation index systems of untapped low- grade low permeable and heavy oil reservoirs are determined. These index systems may establish the foundation for oilfield enterprises to evaluate the operational benefit of untapped low-grade low permeable and heavy oil reservoirs and to formulate the optimal scheme of operating these reservoirs.
棉铃虫幼虫抗菌肽的初步研究*
桂平,
微生物学通报 , 2005,
Abstract: 棉铃虫(Heliothisarmigera)五龄幼虫经大肠杆菌、金黄色葡萄球菌混合菌诱导后,产生抗菌肽,经100℃热处理15min后活性不变,通过琼脂糖孔穴扩散法测定,对革兰氏阴性菌、革兰氏阳性菌以及真菌都具有很强的抑菌活性。CM-Sepharose离子交换层析粗纯化产物经SDS-PAGE测定,其分子量约3kD。
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