螺旋碳纤维化学镀镍及其电磁参数研究     

赵璐  郭永  白云峰  赵建国  李江 《雁北师范学院学报》2011,27(2)

采用化学镀法,以联氨作为还原剂,在螺旋碳纤维表面沉积金属镍,获得一种新的复合功能材料。通过SEM和EDX能谱分析,碳纤维基体上包覆了一层致密均匀而且连续的纯金属镍层,没有引入其它杂质元素。通过对样品在2~18 GHz范围内的电磁参数进行分析讨论,可知表面金属化一定程度上提高了样品的介电损耗,尤其在10~18 GHz有较大增幅,最大达到了35.2左右,表面金属化对样品的电阻率产生了不可忽略的影响,并且在低频处复合材料的电磁损耗都较纯基体材料有较大提高。  相似文献   

低碳经济背景下嵩县菩莲山旅游业发展建议     

刘红芳  张伟峰 《襄樊学院学报》2011,32(8):76-80

低碳旅游是低碳经济大背景下的一种新型旅游形式,是实现旅游业可持续发展的根本需要之所在.菩莲山旅游地正处在起步阶段,在分析菩莲山旅游地资源状况的同时,分析了菩莲山在旅游开发中可能存在和遇到的问题,为避免菩莲山旅游地在旅游开发、发展中出现跟低碳旅游经济相悖的问题,提出菩莲山旅游地要在产品、交通、宣传以及基础设施等方面加大低碳旅游的开发力度,以保障菩莲山旅游业可持续健康发展.  相似文献   

碳风险意识、低碳创新与碳绩效     

周志方  李祎  肖恬  曾辉祥 《研究与发展管理》2019,31(3):72-83

在碳规制加强的背景下，引导企业事先察觉碳风险并通过低碳创新提高碳绩效,已成为一个重要的政策问题。本文以2011—2015年连续出具社会责任报告或可持续发展的企业作为研究样本，实证探析了碳风险意识影响碳绩效的传导机制以及低碳创新在其中的中介效应。研究表明：碳风险意识与企业低碳创新呈正相关；碳风险意识强的企业更愿意进行低碳创新，因而低碳创新成果也越多。研究还发现，低碳创新在碳风险意识与碳绩效两者关系间起不完全中介作用，即碳风险意识不仅仅只通过低碳创新对碳绩效产生影响。上述发现对我国企业加强碳风险意识、提高低碳创新水平及有效提升碳绩效具有重要的参考价值。  相似文献   

低碳城市试点对企业绿色技术创新的影响     

熊广勤  石大千  李美娜 《科研管理》2020,41(12):93-102

The low-carbon pilot policy has played an important role when China make efforts to achieve the carbon emission reduction targets. In order to study whether the construction of low-carbon pilot policy can induce enterprises to carry out green technology innovation, this paper uses China′s low-carbon pilot policy as a quasi-natural experiment, constructs a difference-in-difference-in-differences (DDD) model that "before-after the implementation of the low-carbon pilot policy; if or not in the pilot city; if or not belongs to the high carbon emission industry". Since the third batch of low-carbon pilot cities was officially announced in 2017, the duration of the policy is not enough for us to evaluate its effect, so we take the pilot cities announced in 2010 and 2012 as the main research object. The number of enterprises authorized green patents and micro-economic characteristics of listed companies in China from 2006 to 2017 were used to evaluate the effect of the low-carbon pilot policy on enterprises′ green technology innovation, and explore whether the Porter hypothesis based on China′s low-carbon pilot policy is valid. The results show that: (1) The implementation of the low-carbon pilot policy has significantly improved the green technology innovation level of high-carbon emission enterprises in the pilot cities. The policy has increased the proportion of green patents of high-carbon emission enterprises in the pilot area by 0.929%, and the coefficient is significant at the 5% significance level. Furthermore, the low-carbon pilot policy has a positive effect on both green invention patent and green utility model patent of high-carbon emission enterprises in the pilot area, but has a more significant effect on the green utility model patent. The conclusion of the DDD estimation confirms the validity of the Porter hypothesis based on the low-carbon pilot policy in China. (2)In order to solve the problem of sample selection bias caused by the difference in initial conditions between the treat group and the control group, this paper introduces the propensity score matching method (PSM), and adopts the propensity score matching-DDD (PSM-DDD) method for the first time to explore the effect of the low-carbon pilot policy on green technological innovation of high carbon emission enterprises within pilot cities. The effectiveness of the matching process is proved through the matching balance test and drawing the propensity score value density function graph. The results of the PSM-DDD are basically similar to those obtained by the DDD method. At the same time, this paper proves the validity of the conclusions through parallel trend hypothesis test and a series of robustness tests. (3)The analysis of enterprises geographic heterogeneity shows that the low-carbon pilot policy has significantly improved the green technology innovation of high carbon emission enterprises within the pilot cities in the eastern and western regions, but for those in the central region, the low-carbon pilot policy even has a negative inhibitory effect on their green technology innovation. After grouping the data by patent types, we can see that, for green invention patents, the low-carbon pilot policy can significantly promote the green invention patents of high-carbon emission enterprises in the pilot cities in the eastern and western regions, but it has no significant impact on enterprises in the central region; for green utility model patents, the low-carbon pilot policy only has a positive effect on the utility model patents of high-carbon emission enterprises in the pilot cities in the eastern region, but has no significant impact on the green utility model patents of enterprises in the central and western regions.  (4)The analysis of enterprise ownership heterogeneity shows that the low-carbon pilot policy has significantly improved the green technological innovation of non-state-owned high-carbon emission enterprises in the pilot cities, but has no significant impact on the green technology innovation of state-owned enterprises in the pilot cities. Among them, the low-carbon pilot policy has a significant positive effect on promoting both green invention patents and utility model patents of non-state-owned high-carbon emission enterprises in the pilot cities. As for the state-owned high-carbon emission enterprises in the pilot cities, the low-carbon pilot policy only has a positive effect on their green utility model patents, but has no significant impact on green invention patents. The results of this paper further expand the study on the Porter hypothesis and the evaluation of the low-carbon pilot policy.  相似文献   

二氧化碳排放强度预测与“十三五”减排路径分析——基于STIRPAT模型的构建     

李虹  娄雯 《科技管理研究》2016,(5):233-240

以我国2020年哥本哈根会议上承诺碳减排目标为背景,基于STIRPAT模型预测32种减排方案下2020年碳排放强度值,结果显示,产业结构调整是未来能否实现目标的关键因素,在优化产业结构的政策下,一半以上的方案均能实现碳强度目标,并最终选择4个方案中的控制指标作为未来"十三五"减排方案参考依据,人口年均增长率0.4%-0.72%、城市化率可提升至60%、GDP增速仍可控制在6%—8%之间、可加大服务业增加值比重至50%、单位GDP能耗降低了11.71%。在全国碳减排方案策略下,从人口、城市化率、GDP增速、单位GDP能耗以及服务业增加值比重的角度对我国30个省区的碳减排对策提出建议,为"十三五"期间我国减排方案的制定提供参考依据和科学支撑。  相似文献   

基于STRPAT模型的碳排放情景分析     

钟少芬  郭晓娟  刘煜平  莫健文 《科技管理研究》2019,39(17)

科学合理预测碳排放发展,对建设低碳城市具有重要的指导意义。本文以东莞市为例,采用基于扩展STIRPAT模型,通过岭回归拟合得到碳排放量与GDP、人口、城市化、人均消费支出、工业化及能源利用效率的多元线性模型,在此基础上,根据低碳社会发展各个不同阶段设定基准情景、低碳情景、节能情景等3种情景,对碳排放量进行预测及减排潜力分析。结果表明,人口数量对碳排放的影响最大,城市化率影响最小,碳排放量在基准情景下预计2020年为8246t,2025年达到8177t,而节能情景、低碳情景碳排放量均有不同程度的下降,在低碳发展的政策措施及一系列低碳发展行动与技术支撑下,东莞市碳排放仍具有较大的减排潜力。  相似文献   

基于政府和消费者行为的生产商低碳技术选择研究     

张盼  熊中楷 《科技管理研究》2016,(20):255-260

同时考虑政府征税和补贴以及消费者环保意识,研究生产商的低碳技术选择问题,探讨消费者环保意识、碳税和补贴对生产商3种技术下的碳排放和利润的影响。研究发现,当低碳技术补贴较大且消费者环保意识较强时,生产商采用多技术进行生产,否则,生产商以现有技术进行生产;生产商使用多技术生产的利润总是比仅采用低碳技术生产的利润要高;消费者环保意识的提高并不总能降低生产商的碳排放,而碳税的增加却总能降低其碳排放。  相似文献   

活性炭吸附在废水处理中的应用     

李冬  韩敏 《洛阳工业高等专科学校学报》2008,18(1)

活性炭优良的吸附性能使其在废水处理中得以广泛应用.详细阐述了活性炭吸附在含铬废水、含氰废水,含酚废水等多种废水中的应用研究,并介绍了改性活性炭,活性炭纤维和活性炭与其他水处理技术的联用.  相似文献   

南韩灵芝母种培养基的筛选研究   总被引：1，自引：0，他引：1  

芦站根 《衡水学院学报》2008,10(4)

通过对南韩灵芝菌株在不同碳源、氮源及不同配方的母种培养基的生长实验,筛选出适合其生长的碳源、氮源和最佳培养基配方．试验结果表明：南韩灵芝菌丝体在麸皮、酵母膏,蛋白胨3种氮源中,以麸皮为最适氮源;在葡萄糖、蔗糖和玉米粉3种碳源中,以玉米粉为最适碳源．在5种不同的培养基试验中,加富PDA培养基是最适合南韩灵芝生长的培养基配方．  相似文献   

中国经济发展的低碳化分析   总被引：2，自引：0，他引：2  

毛雁冰 《安徽师范大学学报(人文社会科学版)》2011,39(2):125-129

分析经济增长与环境保护之间的关系,探讨中国发展低碳经济的必要性以及战略选择,提出通过优化产业结构,加强技术自主创新,发展适合中国国情的低碳经济。  相似文献