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1.
梁高 《淮南职业技术学院学报》2004,4(3):81-83
乳化炸药生产中采用的化学发泡敏化方式，往往会产生后效问题，给产品的质量带来很大的影响，提出了对克服发泡后效的方法，并对其进行了理论上的分析论证，通过生产中的实验，证明是切实可行的，并对生产工艺进行了调整，解决了发泡后效问题，提高了产品质量，取得了良好的效果。 相似文献
2.
《International Journal of Information Management》2016,36(4):497-506
This paper investigates the history of economic bubbles and attempts to identify whether there are direct correlations between different bubbles. To support this research, literature has been consulted on historical and recent bubbles, theories surrounding speculation, the market for venture capital, and bubbles in the technology sector. By analysing a range of bubbles, rather than just those in the technology sector, general bubble-principles are also identified. All the economic bubbles are classified under “uncontrolled risk” and a recommended method that can detect and analyse full impacts by uncontrolled risk will be presented, together with future directions to be discussed. 相似文献
3.
Lorenza Parisi 《The Communication Review》2020,23(1):66-89
ABSTRACTIn this paper, we address algorithmic imaginary, perception and tactics of Italian dating apps users. Little attention has hitherto been devoted to the ways in which the algorithms employed by mobile dating platforms (to rate users, to manage user visibility, to arrange results) might contrast, or enhance, people’s homophily. Our goal is to explore whether and how mobile dating algorithms modify the perception of what we define as “relational filter bubbles”; and whether, and how, users believe dating algorithms reshape (extend or limit) the heterogeneity of their intimate interactions. The paper builds on literature addressing online dating, the datafication of society, the rise of the so-called quantified self, and of the algorithmic culture. We organized 4 focus groups involving Italian dating apps users, who reported a variety of sexual orientations and of dating apps usage. Overall, while dating apps’ algorithms operate in an opaque way, participants developed an “algorithmic imaginary”. Moreover, they appreciate the role of mobile dating apps in reinforcing their relational homophily (their tendency to like people that are “similar” to them), whilst, at the same time, mainly using these apps for increasing the diversity of their intimate interactions in terms of extending their preexisting networks. 相似文献
4.
纪晓宇 《山西广播电视大学学报》2010,15(4):78-80
从股市泡沫的定义、分类入手,梳理了国外理性泡沫的研究脉络,从行为金融学、非线性理论、金融物理学三个方面评述了国外非理性泡沫的研究情况,剖析了国外股市泡沫对实体经济影响的不同研究观点。 相似文献
5.
铸坯中与气泡有关的缺陷对于钢的质量有很大的危害,有效去除钢中气泡成为高质量钢的主要任务。文章以吹氩的板坯结晶器为研究内容,运用理论计算对凝固前沿的气泡的受力进行量化。主要结论如下:气泡在钢液中主要受到重力、浮力、虚假质量力、升力、曳力、温度马兰戈尼力、浓度马兰戈尼力的影响。气泡被捕获的时候分为三个阶段,首先是气泡从结晶器主体钢液靠近温度边界层,在这个过程中气泡的运动主要受到曳力、浮力的作用;其次气泡进入温度边界层,在这个阶段气泡主要受到曳力、浮力、以及由温度梯度引起的马兰戈尼力;第三个阶段,气泡穿过温度边界层,到达浓度边界层,受到浓度的马兰戈尼力,其中浓度马兰戈尼力的方向总是朝着凝固前沿的方向。 相似文献
6.
信息的不完全性及不对称性决定了预期只能是有限理性的,心理因素在金融资产泡沫的形成中扮演了重要的角色。因此,行为主体只能是根据自己认识到的约束和自己拥有的信息结构寻求利益最大化,不可避免地会受到心理因素的影响。羊群心理、博傻心理及正反馈交易一定程度上都会影响资产价格的形成。 相似文献
7.
基于R-B模型的房地产泡沫 总被引：1，自引：0，他引：1
本文分析和比较了现有房地产泡沫的度量和检验方法,结果发现,大多数方法只能检验泡沫是否存在,而无法测度其大小。在布兰查德和沃森的股票理性泡沫模型(R-B模型)的基础上,通过修改测度因子,提出了房地产泡沫的测度模型,并进一步描述了该测度模型中所需数据在我国房地产市场环境下的获取方法。接着利用模型对我国四个代表性城市住宅房产进行了实证研究,结果表明,我国房地产市场总体上已经出现一定泡沫,而且,有些地区房地产泡沫已经达到较高水平。 相似文献
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9.
You-hong Fang Chun-xiao Chen Bing-ling Zhang 《Journal of Zhejiang University. Science. B》2009,10(1):46-51
Background: Capsule endoscopy is a novel non-invasive method for visualization of the entire small bowel. The diagnostic yield of capsule endoscopy depends on the quality of visualization of the small bowel mucosa and its complete passage through the small bowel. To date, there is no standardized protocol for bowel preparation before capsule endoscopy. The addition ofsimethicone in the bowel preparation for the purpose of reducing air bubbles in the intestinal lumen had only been studied by a few investigators. Methods: Sixty-four participants were randomly divided into two groups to receive a bowel preparation of polyethylene glycol (PEG) solution (Group 1) and both PEG solution and simethicone (Group 2). The PEG solution and sime-thicone were taken the night before and 20 min prior to capsule endoscopy, respectively. Frames taken in the small intestine were examined and scored for luminal bubbles by two professional capsule endoscopists. Gastric emptying time and small bowel transit time were also recorded. Results: Simethicone significantly reduced luminal bubbles both in the proximal and distal small intes-tines. The mean time proportions with slight bubbles in the proximal and distal intestines in Group 2 were 97.1% and 99.0%, respectively, compared with 67.2% (P<0.001) and 68.8% (P<0.001) in Group 1. Simethicone had no effect on mean gastric emptying time, 32.08 min in Group 2 compared with 30.88 min in Group 1 (P=0.868), but it did increase mean small intestinal transit time from 227.28 to 281.84 min (P=0.003). Conclusion: Bowel preparation with both PEG and simethicone significantly reduced bubbles in the intestinal lumen and improved the visualization of the small bowel by capsule endoscopy without any side effects observed. 相似文献
10.
刘翌楠 《四川教育学院学报》2006,22(9):45-47,50
近年来随着房地产市场的迅速发展，我国的房地产是否存在泡沫越来越受到人们的专注。根据成都市房地产市场近几年的发展状况，运用指标分析的方法对成都房地产市场的泡沫进行定量检验。最后提出从加强监督、抑止投机和建立预警体系三个方面预防房地产泡沫的对策。 相似文献