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Search Results: 1 - 10 of 262663 matches for " 张雪 "
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微博用户对剩男剩女的社会态度研究——基于微博文本情感倾向分析
The Micro-Blog Users’ Social Attitude towards Leftover Men and Women Based on the Text Sentiment Analysis
 [PDF]

, 王鹏
Advances in Social Sciences (ASS) , 2015, DOI: 10.12677/ASS.2015.42016
Abstract:
本研究探讨了网络用户对剩男剩女的社会态度。采用微博文本情感倾向分析的方法对1000条新浪原创微博进行态度研究。采用微博文本情感倾向分析的方法对1000条新浪原创微博进行态度研究,其结果显示微博用户对剩男剩女群体持负向态度。另对标签为剩男剩女的60名新浪微博用户近期发表的900条原创微博进行情感倾向性分析,发现剩男剩女群体的微博呈中性态度,且剩男和剩女的微博关注话题存在明显性别差异。本研究结果对于社会正确理性看待逐渐增多的剩男剩女具有一定的启示意义,对剩男剩女在择偶问题上树立正确择偶观具有引导作用。
This study investigated the Internet users’ social attitude towards leftover males and females. Re-lated to the topic of leftover males and females, 1000 original micro-blog messages selected from Sina Weibo were used to identify the emotional tendencies of these messages. The results showed that the micro-blog users held negative attitude towards leftover males and females. In addition, the emotional tendencies of the 900 original micro-blog messages that were recently published from 60 Sina Weibo users who were marked by leftover males or females were analyzed as well. The results showed that the emotional tendencies of these messages were neutral. Besides, there were dramatically differences on the topics focused by leftover males and females. The research not only induces a rational social attitude towards leftover males and females, but also plays a guiding role for them in setting up the correct conception on choosing spouse.
具有时滞的微分-代数生物模型的分岔与控制

东北大学学报:自然科学版 , 2014, DOI: 10.3969/j.issn.1005-3026.2014.05.007
Abstract: 基于公共渔业经济理论,研究了一类带有时滞的食饵-捕食模型.研究表明:不考虑时滞的条件下,模型出现跨临界分岔,奇异诱导分岔,以及鞍结分岔现象,无捕获下,食饵种群与捕食者种群将共存且模型全局渐近稳定.在时滞存在的条件下,模型存在两个正平衡点,模型出现Hopf分岔现象和周期解,而且随着时滞的增加,模型平衡点的稳定性会随之发生变化.设计的状态反馈控制器可以有效消除模型的分岔,控制种群的变化.利用Matlab软件,数值仿真结果验证了结论的正确性.
真空烘制工艺改善卤豆干的品质

- , 2018, DOI: 10.13982/j.mfst.1673-9078.2018.7.031
Abstract: 本文研究了休闲卤豆干真空烘制工艺中不同烘制温度、时间对其品质、色泽和质构的影响。豆干卤制之后烘制是为了降低豆干中的水分含量和水分活度,延长产品的货架期,便于后续加工贮运,真空烘制在卤豆干加工领域中的应用及对其品质的影响鲜少报道。目前豆干成品的水分含量要求为(45.00±2.00)%,因此应选择合适的真空烘制工艺参数,使产品满足水分含量和水分活度要求的同时,尽量提高其质构和感官品质。对样品采用真空烘制的方法,研究烘制温度及时间,对卤豆干质构、水分含量的影响。结果表明:真空烘制温度、时间对卤豆干水分含量和质构特性影响显著;真空烘制工艺参数为60 ℃(30 min)时,样品的感官和质构特性最佳,同时水分活度最低,为0.832。真空烘制能最大限度降低卤豆干的水分含量,同时保持其原有的风味和色泽,提高其耐贮藏性,该方法为休闲豆干工业化生产和品质控制提供理论依据。
This paper studied the effects of vacuum drying temperature and time on quality, color and texture of stewed dried tofu, in order to reduce the water content and water activity of the dried beancurd, prolong the shelf life of the products, and facilitate the subsequent processing and storage. Till then, there was only few report on the application of vacuum drying in manufacture of stewed beancured. To decease the moisture content of the dried beancurd to 45.00±2.00%. and improve its texture and sensory quality, vacuum drying method was applied and the effects of drying temperature and time on texture and moisture content of dried soybean were studied. The results showed that both the vacuum drying temperature and time had significant influence on moisture content and texture characters of stewed dried tofu. When vacuum drying parameters was 60 ℃ (30 min), the sensory and textural properties of samples were the best, and water activity was the lowest (0.832). Vacuum drying could decrease the moisture content of the stewed tofu, maintain its original flavor and color, and prolong its storage life. This method provided a theoretical basis for the industrial production and quality control of the dried beancurd based snacks.
练习对大脑功能变化的影响及其意义
Practice Effect on the Changes of Brain Function and Its Implications
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杜萍,,
Advances in Psychology (AP) , 2013, DOI: 10.12677/AP.2013.36051
Abstract: 近年来,大脑可塑性逐渐成为认知神经科学的一个重要研究方向。大脑可塑性分为结构可塑和功能可塑。本文介绍了练习引起的大脑功能激活的变化模式,分别是激活增加、激活减少以及激活的功能性重组,并分析了其影响因素,最后主要探讨了练习引起的大脑可塑性在临床上的治疗意义和教育实践意义。
 In recent years, brain plasticity in cognitive neuroscience has become an important research direction. There are structural and functional plasticity. This paper introduces patterns of experience-induced functional plasticity in brain and their determining factors. There are three patterns, including activation decreases, activation increases and reorganization of activation. Finally, the clinical and educational significance in brain plasticity after practice is mainly concluded.
基于LabVIEW的多通道噪声采集系统设计
A Design of Multi-Channel Noise Acquisition System Based on LabVIEW
 [PDF]

李元首, 姜涛,
Open Journal of Acoustics and Vibration (OJAV) , 2013, DOI: 10.12677/OJAV.2013.13005
Abstract:
本文基于NI公司PXI4497数据采集卡,利用LabVIEW研发了风洞内噪声测量试验并行数据采集及实时存储程序,完成了高速数据采集系统的实现和应用。通过试验观察,数据量的存储达到了硬盘读写速度的极限,根据试验特点提出了基于磁盘阵列的更多通道更高采样率的程序设计思想。并成功多次应用于航空工业领域的开口及闭口风洞噪声动态测量试验中,满足了预期的科研要求,为后续的噪声试验数据的处理工作打下了坚实的基础。
>This paper develops a set of noise measure, data acquisition and real-time storage program used in wind tun-nel test based on PXI4497 data acquisition card and LabVIEW. High speed data acquisition system is completed. Through experimental observation, the data stored in the hard disk speeds up to the read and write limit. According to this test characteristic, a design of more channels and higher sampling rate program based on the disk array is proposed and successfully used in noise dynamic measure tests in open and close wind tunnels in aeromagnetic industrial domain. Expected scientific requirement is fulfilled. This is a solid foundation for the noise test data processing in the future.
外倾性在人脑功能和结构上的反映:基于MRI研究的回顾
Brain Functional and Structural Changes of Extraversion: Review of the MRI Researches of Extraversion
 [PDF]

杨志林, , 邹枝玲
Advances in Psychology (AP) , 2014, DOI: 10.12677/AP.2014.41019
Abstract: 随着脑成像技术的不断发展,研究者试图通过脑成像技术研究人格特质的内在神经生理机制。本文对人格的核心特质——外倾性的MRI研究(包括任务态的、静息的、结构的)进行回顾和总结,以期更好地理解外倾性特质的神经机制。研究发现,外倾性与脑岛、腹侧纹状体、杏仁核、眶额叶、楔前叶、前扣带等社会脑网络脑区功能或结构的改变有关。未来的研究需要综合考虑测量手段、选择恰当研究范式,并尽可能考虑年龄、性别、实验刺激类型、被试类型、样本数量等一些因素的影响。
With the development of brain imaging technology, the brain mechanism of personality has captured the attention of researchers for several years. In the present review, MRI researches (including task- fMRI, resting-fMRI, and structural MRI) of extroversion were summarized in order to help understand the neural mechanism of extraversion traits. In summary, extraversion was found to be highly correlated to the functional and structural changes in insula, ventral striatum, amygdala, the medial prefrontal cortex, precu- neate cortex, and anterior cingulated cortex, which were referred to as the social brain network. Future researchers had better choose multiple measurements of extraversion, flexible study design with better ecological validity, and control other extra factors, such as age, gender, stimulus type, subjects’ type and sample size.
死亡凸显效应综述:知死而后生
A Summary of the Mortality Salience Effect: A Theory against Death
 [PDF]

, 李红, 庆林
Advances in Psychology (AP) , 2013, DOI: 10.12677/AP.2013.36049
Abstract: 死亡凸显效(Mortality Salience Effect)是恐惧管理理论最重要的假设之一,指个体在死亡凸显后出现的世界观防御、自尊寻求等一系列心理防御现象,目前该领域的研究主要以探讨死亡凸显对个体行为的影响为主。本文通过梳理死亡凸显效应的相关理论和实证研究,对其理论来源、基本观点、效应独特性及恐惧管理策略进行了综述。由于受文化、宗教、个人特质等因素影响明显,使得实验室的死亡问题研究长期以来都受到信度和效度不足的诟病。因此,在借鉴前人研究的基础上,未来研究可考虑从以下几点进行再探讨:1) 变量控制上,注重区分死亡凸显和其他威胁性刺激效应的不同;2) 技术方法上,有效利用ERPfMRI等技术考察死亡凸显效应的神经心理机制;3) 借鉴中国文化生死观开展死亡凸显效应的本土化研究。
Mortality salience effect refers to psychological defense systems as the wordview defense/ self-esteem. In this paper, major viewpoints, strategies and researches are illuminated. However, complicated factors as culture and characteristics, make laboratory studies criticized by insufficient reliability and validity. Future research can lay emphasis on the following aspects: 1) on variable control, pay attention to distinguish death reminder and other threatening stimulus; 2) on technical approach, utilize ERP and fMRI effectively to investigate neuropsychological mechanism of mortality salience effect; 3) on research orientation, consult Chinese life-death to launch indigenous research.
基于双目立体视觉的图像面积测量算法与技术
Algorithm and Technology of Image Area Measurement Based on Binocular Stereo Vision
 [PDF]

车娟娟, ,
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.37A001
Abstract:
本文基于双目立体视觉测距原理,用普通的USB摄像头搭建双目立体视觉系统,提出了图像面积的非接触在线测量方法。首先对摄像头进行标定,得到摄像头的内参数,然后根据OpenCV的模板匹配算法,求出两幅图像中对应匹配点的水平视差,得到距离参数,最后根据平行双目视觉的成像原理,求得实际图像与其在成像平面上的图像之间的空间几何关系,进而求出图像的实际面积。该方法实现简单、成本低、实时性好。经过实验验证,该算法在一定测量范围内达到精度要求。
>A binocular stereo vision system with a common USB camera is developed based on the distance measurement principle of binocular stereo vision, and the non-contact and on-line inspection method for the area of image is studied. First, we calibrate the camera and obtain the internal parameters of the camera. Second, horizontal parallax of the cor- responding points in two images is calculated by template matching based on OpenCV, and then the distance parameter is obtained. Finally, we find the spatial geometrical relationship between the image of the imaging plane and the actual image, and then the actual area of image is gotten. This method is easy to realize with low cost and real-time perform- ance. The experiment indicates that the algorithm meets the accuracy requirements within certain range of measurement.
1956~2013年汉江流域降雨和气温变化特性分析
The Characteristic Analysis of Rainfall and Temperature between 1956 and 2013 in the Hanjiang River Basin
 [PDF]

李雨,, 国学
Journal of Water Resources Research (JWRR) , 2015,
Abstract: 本文选择汉江流域18个国家气象站的长序列观测资料,采用数理统计、Mann-Kendall检验和Spearman秩次检验法,分别从降雨和气温两个方面,对跨流域调水环境下汉江流域降雨和气温变化特性进行了分析。研究结果表明:1) 丹江口以下流域的多年面均雨量较丹江口以上流域多了158.7 mm;汉江流域温度在1990年以后均出现了明显的升高。2) 经降雨和气温趋势分析可知,汉江流域的降雨无明显的变化趋势,而气温则有显著的升高趋势。3) 在整个汉江流域的降雨无明显变化,而气温显著升高的情况下,考虑到未来跨流域调水以及工农业用水规模的增加,汉江流域水资源量的供需矛盾将不容乐观。
In order to evaluate the characteristics and change trend of the surface precipitation and temperature in the middle and lower reaches of the Hanjiang River before the working of the middle route of the South-to- North Water Diversion Project, eighteen meteorological stations were selected. Furthermore, mathematical statistics, Mann-Kendall test and Spearman test were used, and two aspects of temperature and runoff were analyzed based on the meteorological data of the selected stations. The results are as follows. 1) The surface precipitation of the upper drainage area of Hanjiang River basin is 158 mm more than that of the lower drainage area; the temperature of the whole basin has been raised since 1990. 2) After trend analysis, it unfolds that the change trends of the rain-time series in this region are not noticeable, but the temperature shows a significant rise. 3) The imbalance between water supply and demand in the lower Hanjiang River basin will be very conspicuous, if there are not any engineering and non-engineering actions to take.
河南某2 × 660 MW燃煤机组废水零排放方案研究
Scheme of Zero Wastewater Discharge System for a 2 × 660 MW Power Plant in Henan Province
 [PDF]

胡耘, ,
Advances in Environmental Protection (AEP) , 2015, DOI: 10.12677/AEP.2015.56022
Abstract:
文章系统分析了河南某2 × 660 MW燃煤机组的废水种类、废水产生量和各系统耗水情况,介绍了实现全厂废水零排放所采取的系统方案和关键技术,重点是以旁流石灰处理工艺为主体的循环冷却排水回收系统和脱硫废水“预处理 + 正渗透 + 蒸发结晶”处理系统。该方案同时实现了废水零排放和污泥、结晶盐的资源化利用,对燃煤电厂废水零排放方案设计具有一定的参考价值。
This paper analyzes the wastewater sorts, quantity and water consumption in a 2 × 660 MW Power Plant in Henan Province. Based on this, the scheme of zero wastewater discharge system was proposed. One of the two key sectors in this scheme is the side-stream lime treatment process in the circulating water system, and the other is the desulfurization wastewater treatment which combines routine treatment with forward osmosis (FO), evaporation and crystallization. The scheme can achieve the comprehensive utilization of wastewater, sludge and crystallization salts at the same time, and therefore is valuable for the design of zero wastewater discharge system in coal-fired power plant.
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