Results 21 to 30 of about 9,645 (160)
, 2018 改革开放以来,中国经济高速增长,为中国崛起提供了重要的物质基础与保障。然而,粗放型经济发展模式也导致严重的资源环境问题。金融是现代经济发展核心,实现中国绿色低碳经济发展离不开金融支持。本文首先在分析金融发展、经济增长对碳排放的作用机制基础上,提出以下研究假说:(1)金融发展对碳排放存在正、负两种效应,其综合效应的大小取决于两种效应的相对大小。(2)环境库兹涅兹曲线假说并不是稳健的,其成立与计量方法、研究区域等选取有关。(3)金融发展对碳排放的影响在不同经济发展阶段与金融发展水平下存在门槛效应。(4 ...
任力, 刘玉, 朱东波
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Decoupling Relationship Between Land Use Intensity and Carbon Emissions in Henan Province During 2000—2020 [PDF]
, 2023 [Objective] The land use carbon emissions were measured, the decoupling relationship between land use and carbon emissions were determined, and the carbon emission pattern of land use change was revealed in order to provide a scientific basis for the ...
Cai Enxiang +4 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Lithium‐selenium (Li‐Se) batteries have attracted considerable attention due to their high theoretical specific capacity and the intrinsically good electronic conductivity of selenium. Nevertheless, low active‐material utilization, parasitic side reactions, and sluggish reaction kinetics hinder their practical application.
Yanan Fu +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2005 采用地统计学的方法，研究了科尔沁沙地沙质草场土壤含水量对干旱和降雨响应的空间变异规律。结果表明，干旱时沙质草场表层(0～20cm)、亚表层(20～40cm)土壤含水量可很好地拟合成球状模型和指数模型，在1～2．26m，1～6．63m的中等尺度范围内表现出很高的空间自相关性，空间自相关度分别为0．92，0．87．分维数均表现出较弱的空间依赖性．分别为1．99，1．94，两层土壤含水量变异特征差异小，土壤水分的空间变异性强，破碎化程度高。降雨后沙质草场土壤表层 ...
左小安 赵学勇 赵哈林 李玉霖 移小勇 黄刚
doaj +2 more sources
, 2015 传统的空间面板数据模型利用截距项来体现空间异质性,往往无法完全体现出空间异质性,文章构建一种系数随空间个体变动而变动的空间自回归模型,利用系数来考察空间异质性,并可以考察经济关系以及空间关系的个体特征。在一定的模型设定条件下,文章给出了该模型的完全信息极大似然估计,并推导了该估计量的渐进分布。中国博士后科学基金项目(2012M510670); 全国统计科研计划项目(2012LY015); 教育部人文社会科学研究一般项目 ...
彭小静, 邓明
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Spatially Downscaling of Future Food Demand for Policy Planning
World Food Policy, Volume 12, Issue 1, May 2026.ABSTRACT Understanding the subnational dynamics of food demand, while accounting for the evolution of the agrifood system at the global level, remains a challenge for designing food policy to ensure food security. To link global agrifood systems with subnational food policy planning, we downscale per capita food demand for 62 food commodities at the ...
Chun Song +3 more
wiley +1 more source
Network Structures and Performance of University-Industry Collaborative Innovation [PDF]
, 2017 产品创新的复杂性要求企业充分整合其内外部资源以获得长久的竞争优势。合作创新能够实现组织间资源共享，提高研发效率和成功率。本文以校企合作创新为研究对象，分析校企合作创新网络的演化过程，并分别研究了校企合作创新网络异质性和空间异质性与合作创新绩效的关系。 首先，进行数据抓取、整理和清洗以及相关信息提取。利用网络爬虫从美国专利商标局收集相关数据，进行数据清洗工作，得到原始数据集，包含研究所需的校企合作专利数据;通过原始数据集中的公司和学校名称，整理校企合作关系得到网络数据集，同时获取公司和学校坐标 ...
李茜
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Multi-omics Analysis of the Spatial Heterogeneity of Moutai-flavored Daqu [PDF]
This study employed high-throughput sequencing and ultra-high performance liquid chromatography-mass spectrometry (UPLC-MS)-based untargeted metabolomics to analyze the heterogeneity of physicochemical properties, microbial communities, and metabolites ...
TANG Jiadai, WANG Long, ZHAO Yimei, WU Cheng, QIAO Lin, XIAO Xinrui, GUO Min, YANG Liang
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Grid scale measurement of carbon compensation in Chongqing City: Based on the perspective of land use [PDF]
, 2023 [Objective] Improving the carbon compensation mechanism is an important action to cope with climate change and realize the goal of carbon neutrality. At the grid scale, the establishment of carbon compensation between administrative units can provide a ...
HUANG Huaiyu, GONG Zhiwen
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
wiley +1 more source