检索结果-南通市图书馆

International Journal of Coal Science & Technology 2020年第1期7卷 19-25页

作者： Tao Zhu Ruonan Wang nengjing yi Wenfeng Niu Lifeng Wang Zeyu Xue China University of Mining and Technology.Beijing 100083 China

The total coal consumption in China is on the *** characteristics of CO2 and SO2 emissions in the whole process of coal processing and utilization in China are worthy of *** on the five links of the whole process of coal production and utilization,including coal production,raw coal processing,logistics and transportation,conversion and utilization and resource utilization,this paper summarized and analyzed the energy consumption and pollutant emission sources of these five links,combined with the US Environmental Protection Agency’s AP-42 method and IPCC method,to calculate total pollutant discharge and emission factors,where the emission factors were corrected by conversion *** the same time,uncertainty analysis is performed about CO2 and SO2 *** results showed that CO2 emissions were 3.657 billion tons,and emission reductions were 61 million tons,and SO2 emissions were 4,844,500 tons,and emission reductions were 10.3595 million tons in 2015.

关键词： Coal Industrial chain CO2 SO2 Emission characteristics

NOx storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al2O3 catalyst using CH_(4) as reductant

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2021年第2期23卷 76-84页

作者：竹涛张星伊能静刘海兵李振国 Institute of Atmospheric Environmental Management and Pollution Control China University of Mining&Technology(Beijing)Beijing 100083People's Republic of China Solid Waste and Chemicals Management Technology Center China Ministry of Ecology and EnvironmentBeijing 100029People's Republic of China National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin 300300People's Republic of China State Key Laboratory of Organic Geochemistry Chinese Academy of SciencesGuangzhou 510640People's Republic of China

NOx storage and reduction(NSR)technology has been regarded as one of the most promising strategies for the removal of nitric oxides(NOx)from lean-burn engines,and the potential of the plasma catalysis method for NOx reduction has been confirmed in the past few *** work reports the NSR of nitric oxide(NO)by combining non-thermal plasma(NTP)and Co/Pt/Ba/γ-Al2O3(Co/PBA)catalyst using methane as a *** experimental results reveal that the NOx conversion of NSR assisted by NTP is notably enhanced compared to the catalytic efficiency obtained from NSR in the range of 150°C–350°C,and NOx conversion of the 8%Co/PBA catalyst reaches 96.8%at 350°***(O_(2))has a significant effect on the removal of NOx,and the NOx conversion increases firstly and then decreases when the O_(2)concentration ranges from 2%to 10%.Water vapor reduces the NOx storage capacity of Co/PBA catalysts on account of the competition for adsorption sites on the surface of Co/PBA *** is a negative correlation between sulfur dioxide(SO_(2))and NOx conversion in the NTP system,and the 8%Co/PBA catalyst exhibits higher NOx conversion compared to other catalysts,which shows that Co has a certain SO_(2)resistance.

关键词： non-thermal plasma NOx storage and reduction Co/Pt/Ba/γ-Al2O3 catalyst NOx conversion influence parameter

旅游产业集聚对旅游经济高质量发展的直接效应与溢出效应

在线全文

学校读者我要写书评

暂无评论

河北科技大学学报（社会科学版） 2023年第2期23卷 1-10,21页

作者：王凯易能静湖南师范大学旅游学院湖南长沙410081

旅游产业集聚是旅游经济向高质量转型的必经阶段,为研究旅游产业集聚对经济高质量发展的影响机制,基于2005—2019年中国省际面板数据,运用区位熵、熵值法、ESDA方法以及空间杜宾模型等方法探究了旅游产业集聚对旅游经济高质量发展的影... 详细信息

旅游产业集聚是旅游经济向高质量转型的必经阶段,为研究旅游产业集聚对经济高质量发展的影响机制,基于2005—2019年中国省际面板数据,运用区位熵、熵值法、ESDA方法以及空间杜宾模型等方法探究了旅游产业集聚对旅游经济高质量发展的影响和空间溢出效应。研究结果表明:研究期内,旅游产业集聚和旅游经济高质量发展均具有显著的空间自相关性,并且旅游经济高质量发展空间关联类型以H-H和L-L集聚为主,二者高水平地区的空间演变趋势在整体上均表现为以原有集聚区为中心向邻近地区扩散的特征;旅游产业集聚不仅能显著带动当地旅游经济高质量发展水平的提高,并且具有较强的正向空间溢出效应;交通改善、经济发展和技术进步均能不同程度促进旅游经济高质量发展,旅游碳排放强度则显著抑制旅游经济高质量发展,经济发展和旅游碳排放强度具有较强的正溢出效应,交通改善呈现出显著的负溢出作用;旅游产业集聚影响旅游经济高质量发展存在区域异质性。

关键词：旅游业产业集聚经济高质量 ESDA 空间杜宾模型

中国省域生态文明建设对旅游业碳排放强度的空间溢出效应

在线全文

学校读者我要写书评

暂无评论

中南林业科技大学学报（社会科学版） 2022年第4期16卷 41-49,58页

作者：王凯易能静甘畅湖南师范大学旅游学院湖南长沙410081

基于2005—2019年中国省域面板数据,刻画生态文明建设和旅游业碳排放强度的时空分布格局,并运用空间杜宾模型考察生态文明建设不同子系统对旅游业碳排放强度的空间溢出效应。结果表明:1)研究期内,中国省域生态文明建设水平整体呈“两边... 详细信息

基于2005—2019年中国省域面板数据,刻画生态文明建设和旅游业碳排放强度的时空分布格局,并运用空间杜宾模型考察生态文明建设不同子系统对旅游业碳排放强度的空间溢出效应。结果表明:1)研究期内,中国省域生态文明建设水平整体呈“两边高、中间低”的空间分布格局,其非均衡特征逐渐下降,空间格局演化较为明显;旅游业碳排放强度整体呈“西-中-东”递减的空间分布格局,低强度区和较低强度区呈现出围绕中部地区和西南地区组团式连片扩张的发展态势;2)旅游业碳排放强度具有明显空间正相关特征,整体呈波动上升的空间演变态势,在空间关联类型上以H-H和L-L集聚为代表,并且L-L集聚地区显著增多;3)生态经济文明、生态社会文明、生态环境文明以及生态文化文明建设对旅游业碳排放强度均存在显著的负向直接效应;就空间溢出效应而言,生态经济文明、生态环境文明以及生态文化文明对旅游业碳排放强度存在不同程度的负向空间溢出作用。

关键词：旅游业碳排放强度生态文明建设空间溢出效应空间杜宾模型

Correction to:CO_(2) and SO_(2) emission characteristics of the whole process industry chain of coal processing and utilization in China

在线全文

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2021年第1期8卷 176-176页

作者： Tao Zhu Ruonan Wang nengjing yi Wenfeng Niu Lifeng Wang Zeyu Xue China University of Mining and Technology Beijing100083China

In the original publication,there were few amendments to be made:In Abstract,"4,844,500 tons"should be changed into"4.4845 million tons".The ordinate unit of Fig.1"million tons"should be changed into"billion tons".In Introduction Section,"China’s total coal production increased from 2.57 million tons in 2006 to 3.52 million tons in 2017."should be changed into"China’s total coal production increased from 2.57 billion tons in 2006 to 3.52 billion tons in 2017."

关键词： characteristics milli industry

Soft Decision Tree for Regression

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science and Information 2022年第5期10卷 518-530页

作者： nengjing GUO Jianfeng HUANG The Troops 61206 PLABeijing 100041China School of Earth and Space Sciences Peking UniversityBeijing 100871China

Decision tree(DT)plays an important role in pattern recognition and machine learning,which is widely used for regression tasks because of its natural ***,the traditional decision tree is constructed by recursive Boolean *** discrete decision-making process in DT makes it non-differentiable,and causes the problem of hard decision *** solve this problem,a probability distribution model—Staired-Sigmoid is proposed in this *** Staired-Sigmoid model is used to differentiate the decision-making process,by which the samples can be assigned to two sub-trees more *** on Staired-Sigmoid,we further propose the soft decision tree(SDT)for regression tasks,where the samples are assigned to different sub-nodes according to a continuous probability *** process is differentiable,and all parameters in SDT can be optimized by gradient descent *** to its constructing rules,SDT is more stable than decision tree,and it is easier to overcome the problem of *** validate SDT on several datasets obtained from *** demonstrate that SDT achieves better performance than decision tree,and it significantly alleviates the overfitting.

关键词： soft decision tree regression staired-sigmoid differentiable

在线全文

学校读者我要写书评

暂无评论

烧结烟气脱硫脱硝技术进展

河北冶金 2019年第A1期 7-10页

作者：竹涛伊能静王礼锋牛文凤中国矿业大学(北京)化学与环境工程学院北京100083 中国矿业大学(北京)大气环境管理与污染控制研究所北京100083

烧结过程是钢铁行业SO2和NOx的主要排放源,随着我国“十三五”期间节能减排工作的开展,对烧结烟气脱硫脱硝工艺的研究进展变得尤为重要。总结了我国近几年SO2和NO2的排放情况,分析了目前主流的烧结烟气脱硫和脱硝工艺技术的优缺点,探讨... 详细信息

烧结过程是钢铁行业SO2和NOx的主要排放源,随着我国“十三五”期间节能减排工作的开展,对烧结烟气脱硫脱硝工艺的研究进展变得尤为重要。总结了我国近几年SO2和NO2的排放情况,分析了目前主流的烧结烟气脱硫和脱硝工艺技术的优缺点,探讨了烧结烟气气态污染物治理的发展方向,指出随着环保要求的日益严格,烧结烟气协同脱硫脱硝将是烧结烟气气态污染物治理的主流方向。

关键词：烧结烟气脱硫脱硝脱硫脱硝一体化