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Search Results: 1 - 10 of 48627 matches for " 毋雪梅 "
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温度、气氛和淬冷对阿利特固溶和多晶转变的影响(英文)
管宗甫,,望伊涛,余远明,周颖
硅酸盐学报 , 2010,
Abstract: 利用X射线衍射和等离子电感耦合等离子发射光谱研究了烧成温度、烧成气氛、淬冷开始温度等参数对实验室熟料中阿利特的多晶转变和Al3+,Fe3+,Mg2+等主要杂质离子固溶量的影响。随煅烧温度升高,阿利特对称性升高,不掺杂熟料中阿利特晶型从MⅠ转变为MⅠ和MⅢ型的混合体;掺杂熟料中阿利特晶型从MⅠ转变为M和R型混合体。氧化气氛烧成熟料中阿利特的对称性高于还原气氛烧成的。还原气氛烧成熟料中阿利特无论掺杂与否,阿利特室温保留晶型都呈现MⅢ型晶体衍射特征。氧化气氛下烧成掺杂熟料中阿利特以R型为主并含有M型的混合体,不掺杂熟料中阿利特以MⅢ型晶体存在。掺杂熟料从1450℃淬冷可以保留较多的R型阿利特。在其它较低温度淬冷,掺杂熟料中阿利特更多呈现MⅠ型晶体的衍射特征。不掺杂熟料中阿利特在所有开始温度淬冷,都呈现M型衍射特征,其原因在于随煅烧温度升高以及随淬冷起始温度的升高,Al3+在阿利特中的固溶量升高,Fe3+的固溶量有所降低,Mg2+的固溶量则没有明显变化。氧化气氛下烧成的阿利特中Al3+的固溶量要高于还原气氛下的,而还原气氛下烧成的阿利特中Fe3+/Fe2+的固溶量高于氧化气氛下的。
基于非周期极化铌酸锂晶体产生任意频率太赫兹辐射
,朱巧芬,张岩
红外与毫米波学报 , 2011,
Abstract: 理论上研究并论证了飞秒激光在非周期性极化畴反转的铌酸锂晶体(LN)中由光整流效应产生任意频率、窄带的太赫兹(THz)波辐射的可行性.为实现对THz波谱的整形,文中利用模拟退火(SA)算法设计出铌酸锂晶体的极化畴反转结构的最佳模型,由此可产生任意预置时间波形的THz辐射场.结果表明,SA算法是一种有效的通过设计晶体极化畴反转结构,实现对THz时间波形整形的方法.
随机Logistic扩散污染模型的稳健广义矩估计
Robust Generalized Method of Moment Estimator for the Contaminated Stochastic Logistic Diffusion Model
 [PDF]


Statistics and Applications (SA) , 2013, DOI: 10.12677/SA.2013.24017
Abstract:
本文首次研究了維勒过程受污染的随机Logistic扩散模型,提出了稳健的广义矩估计方法。模拟表明所建立的稳健广义矩估计优于通常的极大似然估计。
The Contaminated Stochastic Logistic Diffusion Model; Robust Generalized Method of Moment Estimator
一种基于多种特征组合的烟雾检测方法
A Method of Smoke Detection Based on Various Features Combination
 [PDF]

, 杨胜
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.35041
Abstract:
视频中类似烟雾的区域很大程度上增加了烟雾检测的误差,为了提高烟雾检测的准确性,利用BP神经网络分类器,一种基于小波特征、烟雾纹理特征以及Y分量均值特征相结合的烟雾检测方法被提出。首先对视频序列进行运动区域提取;然后对疑似区域提取小波特征、纹理特征以及Y分量均值特征,形成一种新的多特征组合向量;最后将特征向量输入到BP神经网络分类器进行检测。实验表明,通过这种组合特征的方法,检测结果更有效。
Smoke-like regions greatly increase smoke detection errors in the video. In order to improve the accuracy of smoke detection, a smoke detection method based on BP neural network is proposed, combining the wavelet feature, smoke texture feature and mean of Y component pixel value. Firstly, moving regions in the video sequences are ex- tracted; secondly, the wavelet feature and texture feature of suspected regions are extracted, then a new kind of multi-feature vector is formed. Finally, feature vector is input into the BP neural network classifier for smoke detection. The experiments show that smoke detection results are more effective by combing various features.
从“思辨的人”到“现实的人”—马克思对德国旧哲学的双重超越
From “the Speculative People” to “the Reality Person”—Marx’s Dual Transcendence of Old German Philosophy
 [PDF]

姜珊,
Advances in Philosophy (ACPP) , 2014, DOI: 10.12677/ACPP.2014.34009
Abstract:
马克思对德国旧哲学的双重超越表现为马克思思维方式的转变,即把对“人”的理性思辨转化为对“人”的现实理解。马克思从“改变世界”的哲学使命出发,以“现实的人及其历史发展”为理论基点,完成了从实证唯心主义到真正的实证科学的革命,也就是实现了从旧唯物主义世界观到历史唯物主义新世界观的革命。马克思对德国旧哲学唯心论和旧唯物论的扬弃,实现了对唯物主义和唯心主义的双重超越。
Marx’s dual transcendence of old German philosophy represents as the conversion of Marx’s thinking mode, from the rational speculation of “people” to the real understanding of “person”. Starting from the philosophy mission of “changing the world”, based on the theory of “reality person and its historical development”, Marx completed the revolution from idealistic positivism to real empirical science, which realized revolution from the old materialism world outlook to the new historical materialism world outlook. Marx discarded old German philosophy of idealism and old materialism, so as to realize the dual transcendence of materialism and idealism.
暴力电子游戏的消极影响研究综述
Research Summary of Negative Effects of Violent Video Games
 [PDF]

罗红,
Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.62023
Abstract:
随着计算机和网络的普及及电子产业的发展,电子游戏已越来越成为人们生活的重要休闲方式,其中暴力电子游戏尤其受到青年一代的欢迎。与传统暴力影视作品相比,暴力电子游戏具有更强的互动性、同步性、可重复性及直接强化的特点,这也使其对玩家的影响更大。在前人研究的基础上,本文从攻击性行为、攻击性认知、攻击性情感、生理唤醒及减少亲社会行为五个方面论述了暴力电子游戏对玩家的影响,并根据现有的理论模型对此进行了解释,为未来进一步干预暴力电子游戏的消极影响提出一些建议。
With the popularity of network, and the development of electronic industry, electronic game has increasingly become an important leisure; people’s life of violent video games was welcomed by the younger generation in particular. Compared with the traditional violent films, violent video games have more interactivity, synchronicity, repeatability, and the characteristics of direct reinforcement, and this also makes it more influence players. On the basis of predecessors’ research, this article discusses the influence of violent video games on players from five aspects of the aggressive behavior, cognition, aggressive feelings, aggressive physical arousal and reducing pro- social behavior, and explains it based on the existing theoretical model, thus putting forward some suggestions for further intervention of the negative effects of violent video games.
基于μC/OS-II的无线传感器网络网关的设计与实现
The Design and Implementation of the WSN Gateway Based on μC/OS-II
 [PDF]

, 宋东东
Journal of Sensor Technology and Application (JSTA) , 2016, DOI: 10.12677/JSTA.2016.42009
Abstract: 随着无线传感器网络的大规模应用,应用系统对传感网络传输实时性的提升,汇聚节点感知数据的远程实时传输显得尤为重要。本文将基于ZigBee协议的无线传感器网络与基于TCP/IP协议的Internet相连接,并引入μC/OS-II嵌入式实时操作系统,对系统资源进行管理和调度。实验结果表明,所设计的网关能够有效解决数据远程传输的问题,同时能够满足应用监控的实时性要求。
With the large-scale application of wireless sensor network (WSN), in this application system, it is particularly important to promote the transmission real-time and achieve the remote real-time transmission of the data that the sink nodes sensor gets. This paper uses the way of the connection of the WSN based on Zigbee protocol and the Internet based on TCP/IP protocol, meanwhile in-troduces μC/OS-II embedded real-time operating system to manage and schedule the system re-source. The experiment result shows that the design of this gateway can effectively solve the problem of data remote transmission, and also can meet the real-time requirement of the applica-tion monitoring.
二氧化碳与人类活动对气候的影响——一个全球性的问题

地理科学进展 , 1984,
Abstract: 近年来,对进入大气的二氧化碳不断的增加的现象,世界上许多科研工作者给予了极大的关注。矿物燃料的燃烧,森林的砍伐以及土地利用的变化,都是造成这个问题的根源。上一个世纪全世界的二氧化碳总量增加了大约百分之十五,而目前,二氧化碳的总量每年却以百分之零点四的速度往上递增。
国际地下水会议

地理科学进展 , 1983,
Abstract: 由捷克斯洛伐克地质机构组成的为期一周的大会,在捷克斯洛伐克政府、联合国教科文组织,国际水文学科学协会、国际水文学家协会以及国际应用分析研究院的支持下,于1982年9月7日至11日,在布拉格举行。除正式会议和实地考察以外,大会还举行了一个有关“农业活动对
二氧化碳与人类活动对气候的影响——一个全球性的问题

地理科学进展 , 1984, DOI: 10.11820/dlkxjz.1984.01.006
Abstract: 近年来,对进入大气的二氧化碳不断的增加的现象,世界上许多科研工作者给予了极大的关注。矿物燃料的燃烧,森林的砍伐以及土地利用的变化,都是造成这个问题的根源。上一个世纪全世界的二氧化碳总量增加了大约百分之十五,而目前,二氧化碳的总量每年却以百分之零点四的速度往上递增。
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