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随着比特币的全球风靡,作为比特币的底层技术支持的区块链引起广泛关注。文章在介绍区块链内涵的基础上,归纳了区块链的国外研究动态和具体应用场景,分析了区块链带来的变革与挑战。研究发现:区块链技术为全球的互联互通建立了新的信任模式,其优化交易流程、降低交易成本、提升协同效率的优势,为各行业的痛点带来变革性的解决方案。但区块链经济带来的改革不至于会颠覆世界,其标准化程度也需要一些时间才能被行业参与者及监管者广泛接受,它给相关的行业也带来技术、商业模式、政府监管、生态系统等挑战。如何形成区块链发展的良性生态循环和制定统一的标准,是未来区块链研究的热点问题。 相似文献
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王珍珍 《商情·科学教育家》2008,(5)
背信犯罪的自身特点是侵害了市场经济信用制度、违背信任对财产所有权人造成侵害。此类罪在德、日已确立,由于市场经济的快速发展,为了惩罚背信犯罪、保护财产权,我国刑法亦将背信犯罪纳入其中,并规定了相应的罪名、罪状和法定刑。 相似文献
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在市场需求不确定情况下,考虑数字技术应用前后供应商生产成本和消费者绿色信任变化时政府部门如何确定绿色产品补贴策略。结果表明：政府对绿色产品所制定的预期目标越高和市场需求不确定性越大时,政府对绿色产品的固定补贴额度和折扣价格以及供应商绿色产品最优产量也越高;无论是否应用数字技术,从政府角度而言,提供固定额度补贴往往是最优选择。从消费者角度而言,政府价格折扣补贴有利提高消费者剩余;应用数字技术能够降低生产成本和提高消费者绿色信任,政府最优补贴降低,进而提高整体社会福利;在政府选择价格折扣补贴策略下,随着消费者绿色信任提高,有利于供应商减小库存积压的风险。 相似文献
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英语学习是一个高度互动的过程,教学课堂中大量的时间要用于师生交流或学生间互动。课堂互动在高职高专英语教学起着非常重要的作用。本文从分析高职高专院校的学生英语学习现状入手,阐述了互动教学的理论和现实意义．论证了互动教学模式是提高英语教学水平的有效手段。 相似文献
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Oil spills may considerably damage sensitive coastal wetlands. The phytoremediation potential and restoration of a dominant coastal marsh plant, Cyperus rotundus, for diesel pollutant and its phytoremediation effectiveness were investigated in this open-air pot experiment. Cyperus rotundus was transplanted into soil contaminated with diesel at concentrations of 1 000, 5 000, 10 000, 15 000, 20 000 mg/kg. In order to better elucidate the biochemical and physiological responses to diesel pollutants, activity of the antioxidant enzymes peroxidase （POD）, catalase （CAT） and ascorbic acid oxidase （AAO） were determined in the plant tissue after 50 d treatment at the levels mentioned above. The results showed that CAT and AAO of stem and leaf exhibited peak enzyme activities on 15 000 mg/kg soil and 10 000 mg/kg soil respectively, and declined at higher concentrations. Additionally, the increment of biomass and the content of soluble protein, as well as chlorophyll content were affected by diesel. The highest restoration effectiveness appeared at the level of 5 000 mg/kg. Collectively, Cyperus rotundus is a potential plant which can be used for restoring the diesel-contaminated soil. 相似文献
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Daqing Wetland was contaminated by heavy metals for holding lots of industrial and domestic waste water. Due to their high stability and non-degradation, heavy metals are possible to gather in human body through the food chain and then threaten health. Water samples were collected from Longfeng Wetland and lake marshes in the vicinity of Daqing City. The contents of heavy metals （Cd, Pb, Cr, Cu, Zn, Ni） were determined, and the contamination degrees were evaluated simultaneously. The results indicate that heavy metals of Zn, Ni, Cd, Cr and Pd have contaminated the Longfeng Wetland severely. In addition the concentrations of Cr and Cd in some lakes around oil wells are excessively high, and have overrun the grade V based on the threshold values of surface water given by the National Environmental Protection Agency of China. Some measures have to be taken to tackle heavy metal contamination of Longfeng Wetland and lake marshes in Daqing City. 相似文献
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王珍珍 《通化师范学院学报》2010,31(6):51-52,61
先秦儒家的理想人格思想在中国传统的理想人格思想中占有重要的地位,这一时期儒家对理想人格的追求可以用＂内圣外王＂来概括。文章主要分析了儒家＂内圣外王＂这一思想的发展演变过程。这一思想开创于孔子,发展于孟子,完善于荀子。 相似文献
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在手机日渐普及的时代,越来越多的大学生沉迷于手机网络,这严重影响了大学生的健康成长。本文从媒介素养教育入手,为大学生日益严重的手机成瘾提出客观、实际的建议。 相似文献