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Search Results: 1 - 10 of 232584 matches for " 刘瑞? "
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注意和期望对间断计时行为的影响
Influence of Attention and Expectation on Interrupted Timing Behavior
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Advances in Psychology (AP) , 2012, DOI: 10.12677/ap.2012.22010
Abstract: 使用单任务研究程序,预期式研究范式,以产生时距作为反应指标,通过两个实验考察短时距估计中的间断位置、间断时距和提示线索效应,揭示注意和间断期望对短时距估计的影响。研究结果表明,间断实验中表现出极其显著的提示线索效应,间断位置(等待时距)效应显著,间断时距效应及间断位置与间断时距的交互效应不显著。由此得出:1) 注意是影响被试时间判断的主要因素,被试的产生时距随着等待时距的增加而延长。2) 被试对间断的期望显著地影响其时间估计行为,无间断实验条件下,间断期望有损于时间估计。
Based on previous theories and studies, we selected the prospective paradigm and creatively used the single-task program in this research. Experiments were conducted with geometric stimulus presented in visual mode, we aimed at exploring the effect of break position (waiting duration), break duration, and the effect of expecting a break. At the same time, the relationship between duration production and the break po-sition was further investigated. The results showed that the effect of break position (waiting duration) is sig-nificant. The cue factor nested in experimental conditions shows a significant effect. The effect of the break duration and the combined effect of the break duration and the break position are not discovered in this ex-periment. Two main conclusions are drawn from this study: 1) Attention is an important factor which influ-ences subjects’ interrupted timing behavior, the break position may, at some extent, lengthen duration estima-tion. 2) Subjects’ expecting of a break in timing tasks influences their timing behavior. Subjects produce the shorter value of duration estimation in the cued conditions of trails without breaks than in the uncued condi-tions of trails without breaks.
蔬菜零售商经营行为研究综述
Literature Review of the Research on the Conduct of Vegetable Retailers
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曹萌,
Modern Marketing (MOM) , 2014, DOI: 10.12677/MOM.2014.41003
Abstract: 蔬菜是居民日常生活的重要组成部分,同时也与生产经营者的收入息息相关。蔬菜营销渠道是否畅通直接影响到蔬菜产业的发展和渠道各成员的经济利益。作为蔬菜营销渠道中的重要环节,蔬菜零售商对稳定蔬菜价格、促进蔬菜产业链健康运转发挥着重要作用。本文从经营环境、零售商与批发商、消费者间的博弈关系等几个方面对蔬菜零售商的经营行为的研究进行归纳分析,总结评述国内外学者对影响零售商经营行为的各个因素的相关研究,并针对研究中发现的问题提出相应改进的建议与对策,以期对蔬菜零售商经营行为的进一步研究提供参考
Vegetables are an important part of the daily life of residents, which are closely linked with the income of production managers. The efficiency of the operations of vegetable marketing channels directly affects the development of vegetable industry and the economic interests of channel members. As an important link in the marketing channel of vegetables, vegetable retailers play an important role in stabilizing prices of vegetables and promoting the healthy operation of vegetable industry chain. This paper summarized and analyzed the researches on the management behavior of vegetable retailers from the perspectives of the operating environment, the game relationship between retailers, wholesalers and consumers. The paper summarized and commented on the domestic and foreign scholars’ studies on the various factors which affect the behaviors of retailers. And some suggestions and countermeasures to improve the issues were put forward in order to provide the reference for further study on vegetable retailers’ operating behaviors.
贵州西部二叠系主采煤层稀土元素分布特征及影响因素分析
Distribution Characteristics and Influence Factors of Rare Earth Elements in Guizhou Permian Coal Measure Strata
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, 魏怀
Advances in Geosciences (AG) , 2015, DOI: 10.12677/AG.2015.54030
Abstract: 贵州是我国煤炭资源蕴藏极为丰富的省份,是中国重要的煤炭生产基地,但煤层中元素地球化学分布情况研究程度低,对贵州煤炭资源有效利用是一项严重的欠缺。通过对贵州西部二叠系主采煤层稀土元素地球化学研究,获得了大方、黔西、威宁、赫章、织金等地主采煤层稀土元素分布特征,并得出煤中稀土元素主要来源于陆源碎屑,与峨眉山玄武岩有关。煤层中稀土元素的含量受到沉积环境和陆源区母岩性质的影响,稀土元素随着从玄武岩风化碎屑多的三角洲平原环境,到受海水影响较大的潮坪环境,稀土元素逐渐被稀释,靠近陆地的成煤环境稀土含量较高,远离陆地的成煤环境形成的煤层中稀土含量低。根据这种分布规律,提出了利用稀土元素地球化学来区分贵州西部成煤环境的新思路,这对解决贵州西部三角洲成煤还是潮坪成煤问题具有现实意义。
Guizhou has abundant coal resources which is an important coal production base in China, but few researches have been done on the element geochemistry of coal measure strata in Guizhou Province, and the effective utilization of coal resources in Guizhou is a serious defect. Based on element geochemical studies of the main Permian exploitable coal measure strata in western Guizhou, geochemical distribution characteristics of the rare earth elements in the main exploitable coal measures have been revealed in the regions of Dafang, Qianxi, Weining, Heizhang, Zhijin, etc. of Guizhou province. The REEs in coals are mainly continental origin, associated with Emeishan basalt. Contents of REEs in coal seam are affected by sedimentary environments and lithology qualitative in terrigenous areas. REEs are gradually diluted from delta plain environment, which contains more basalt weathering debris, to the tidal flat environment greatly influenced by the water. The contents of REEs are higher when coal-forming environment is closer to land, while the contents of REEs are lower when coal-forming environment is away from land. According to the rules of distribution of REEs in coal measures, a new idea has been put forward to make use of the geo-chemical composition characteristics to classify coal-forming environments, which is of great sig-nificance in dissolving the problem of whether coal measures were formed either in delta envi-ronment or in tidal-flat environment in western Guizhou.
76例乳腺肿瘤超声图像预处理研究
The Research on Preprocessing for the Gray-Scale Ultrasound Breast Tumor Images of 76 Cases
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, ,
Hans Journal of Biomedicine (HJBM) , 2015, DOI: 10.12677/HJBM.2015.52002
Abstract:
以76例乳腺肿瘤灰阶超声图像为研究对象,根据医学超声图像的特点及P-M模型的缺点,提出以图像的局部信息确定扩散门限的改进的P-M模型滤波方法,通过采用多种图像预处理算法及上述改进的P-M模型滤波法对76例乳腺肿瘤超声图像进行试验,实验结果显示,改进的P-M模型滤波方法可以更有效的滤除斑点噪声。
This paper mainly focuses on the gray-scale ultrasound breast tumor images. According to the characteristics of ultrasonic image and shortcomings of the P-M model, a modified P-M model filter with local information and spread threshold is proposed. All common pretreatment algorithms are put into experiments and a comparison is made among them. The results show that the modified P-M model filter can more effectively remove the speckle noise.
吉林省蛟河橄榄石宝石矿床地质特征及成矿条件研究

地质与勘探 , 2001,
Abstract: 吉林省蛟河橄榄石宝石矿床是我国少数几个重要的有色宝石矿床之一。该矿床主要受新生代NE向敦密断裂带以及次级NW向超壳断裂控制,是第三纪船底山期火山喷发的产物。矿石主要为橄榄岩包体。地幔深处的富粗晶橄榄岩,超壳深断裂带,岩浆的快速上升构成了成矿的基本条件。
老金厂金矿床成矿富集规律和找矿标志

黄金科学技术 , 1997,
Abstract: 论述了老金厂金矿来的成矿地质背景和矿床地质特征。对其成矿富集规律及找矿标志进行了初步的探讨。
经济预期理论研究的一个推进——评《预期理论史考察——从理性预期到孔明预期》

天府新论 , 2008,
Abstract: 经济预期是指经济行为人对于经济变量(如价格、利率、利润以及收入等)在未来的变动方向和变动幅度的一种事前估计或主观判断。显然,正确的预期有助于市场主体适当行为,而错误的预期将导致市场主体行为失当甚至血本无归。江世银教授长期关注经济预期问题,继出版了《中国资本市场预期》(商务印书版)之后,又推出了新作《预期理论史考察———从理性预期到孔明预期》(经济科学出版社2008年出版)新作。作者在该书中认为,预期的发展经历了静态预期、外推型预期、适应性预期和正在经历理性预期和未来的孔明预期等五个阶段。理性预期向前发展必然会产生孔明预期。现实经济生活中普遍存在的是理性预期、准理性预期或亚理性预期。无论是进行投
电解水在黑小麦发芽中的应用研究

- , 2016, DOI: 10.13982/j.mfst.1673-9078.2016.6.041
Abstract: 本研究用电解水生产黑小麦芽,探究电解水对黑小麦发芽及生长的影响,并考察了电解水处理对黑小麦芽基本营养成分的影响,以期为电解水用于黑小麦的发芽提供科学依据。试验结果表明,电解水均可以促进黑小麦种子的萌发,其中pH值为4.55,有效氯浓度20.14 mg/L的酸性电解水处理组黑小麦发芽率比自来水对照组提高15.29%。但电解水处理组会不同程度的抑制黑小麦芽胚轴和胚根的生长,与自来水pH值相近的酸性或碱性电解水的抑制作用相对较弱。经pH值4.36~4.91,有效氯浓度10~30 mg/L的酸性电解水处理的黑小麦芽脂肪含量比自来水对照组降低27.06%~36.93%,还原糖含量降低21.84%~56.58%,总糖含量降低13.68%~27.11%,而蛋白质含量与对照组间无显著差异。因此在黑小麦芽的生产过程中,适宜在种子浸泡阶段使用电解水,而在芽苗淋浇阶段使用自来水,这样既促进了种子的萌发,也不会对黑小麦芽的生长产生抑制作用。
Electrolyzed water was used to produce black wheat sprouts, and the effect of electrolyzed water on germination, growth, and basic nutrient content of black wheat sprouts was investigated to provide a scientific basis for applying electrolyzed water in black wheat sprout production. The results showed that electrolyzed water promoted the germination of black wheat sprouts, and the germination rate of black wheat seeds treated with electrolyzed water at pH 4.55 with an available chlorine concentration of 20.14 mg/L was 15.29% higher than germination rates of seeds exposed to tap water. However, electrolyzed water inhibited the growth of hypocotyls and radicles of black wheat sprouts to various extents, while the inhibitory effects of acidic or alkaline electrolyzed water with pH values similar to that of tap water was relatively weak. The fat, reducing sugar, and total sugar content of black wheat sprouts treated with acidic electrolyzed water (pH: 4.36~4.91, available chlorine concentration: 10~30 mg/L) were 27.06~36.93%, 21.84~56.58%, and 13.68~27.11% lower than sprouts exposed to tap water, respectively, while no significant differences in protein content were seen between groups. Therefore, during the production of black wheat sprouts, electrolyzed water and tap water are suitable for the soaking stage and the spraying stage, respectively, which can promote the germination and prevent inhibition of black wheat sprout growth.
贵州省黔西县二叠系龙潭组主采煤层微量元素分布特征及制约因素探讨
Distribution Characteristics and Influence Factors of Trace Elements in Western Guizhou Permian Coal Measure Strata
 [PDF]

, 谢樨, 魏怀
Advances in Geosciences (AG) , 2015, DOI: 10.12677/AG.2015.53014
Abstract:
黔西县是贵州主要的产煤县之一,煤炭资源丰富,煤层主要产于二叠系上统龙潭组(P31)地层中,属于织纳煤田。通过对主要矿区主采煤层系统取样分析,研究了不同煤层、不同矿区微量元素空间分布特征;与相邻的大方、赫章等区域煤层中微量元素含量对比发现,在陆源供给多的三角洲平原环境形成的煤层中微量元素含量相对高,在受海水影响较大的潮坪环境煤层中微量元素相对含量低,揭示了研究区陆源物质供给母岩——玄武岩具有较高的微量元素地球化学背景是其主要制约因素。个别煤层中有害元素Pb、Tl等含量高,是后期热液活动和断裂构造影响的结果。
Guizhou has abundant coal resources, but little research has been done on the element geochemi-stry of coal measure strata in Guizhou Province, and the effective utilization of coal resources in Guizhou is a serious defect. Based on element geochemical studies of the main Permian exploitable coal measure strata in western Guizhou, the element geochemical distribution characteristics of the different coal seam and different mining area have been revealed, contrasting with the trace element content in Dafang, Hezhang, etc. The element contents are mainly affected by terrestrial material supply. Coal measures formed in the delta plain environment where sufficient terrestrial materials are supplied contain relatively abundant trace elements, whereas those formed in the tidal-flat environment influenced greatly by seawater have relatively low contents of trace elements, mainly controlled by the geological fact that basalts—the parent rocks of source regions contain high trace elements. The content of Tl and Pb in coal seam is higher, and it is the result of the late hydrothermal activity and the effect of the fracture structure.
浅谈我国博士研究生申请考核制
A Discussion on China’s Doctorate Application-Examination System
 [PDF]

,, 应斯斯
Creative Education Studies (CES) , 2016, DOI: 10.12677/CES.2016.43015
Abstract:
由于传统博士生入学考试制度存在的种种问题,“高等教育去行政化”政策的出台、国外的申请考核制的延续实施和我国申请考核制的成功实践,让申请考核制不断地成为各大高校招收博士研究生所青睐的选拔形式。而且,申请考核制还具有选拔出高质量博士生,维护考生利益的优势。但是申请考核制在实施过程中存在综合考试形式单一,容易造成招生不公正现象的问题。本文对这些问题提出了丰富综合考试形式,完善监管体系,做到信息公正、公开的解决方法。
Because of the problems of the traditional entrance examination for doctoral student, the intro-duction of the policy “de-administration in higher education”, the continuous implementation of application-examination system in foreign countries and the successful practice of application- examination system in our country, application-examination system is becoming a favored selec-tion method used by universities to enroll doctoral student. What’s more, application-examination system takes the advantages of selecting high-quality doctoral student, and safeguarding the interests of candidate. But the form of comprehensive examination is single; the implementation of application-examination system easily arises the phenomenon of unfair recruitment. Based on these problems, this paper suggests that application-examination system should enrich the form of comprehensive examination, and improve regulation system to ensure that information is fair and open.
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