Results 41 to 50 of about 50,543 (184)

A Study about the Impact of Internalization of Environmental Cost on China’s Rare Earth Export [PDF]

open access: yes, 2016
自上世纪90年代开始,中国逐渐取代美国成为世界上最大的稀土出口国,直至今日,还供应着世界上超过90%的稀土。作为“工业维生素”,稀土是一种非常重要的矿产资源,也是中国唯一能大量出口的大宗商品。伴随着稀土出口井喷,一系列问题比如稀土贱卖、盗采走私、环境破坏等也逐渐显现,稀土生产过程中的环境破坏问题受到越来越多的关注。本文重点研究了稀土生产的环境成本及其内部化后对中国稀土出口影响的传导机制,并测算出其对贸易的影响程度,尝试回答了“环境成本内部化对稀土贸易影响”和“不同环境规制强度下的贸易影响变动”的问题 ...
赖鹏
core  

Electronic Modulation of CoNi Nanoparticles by N‐Doped Carbon for Efficient Lignin Hydrogenolysis to Aromatic Monomers

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo   +3 more
wiley   +1 more source

色散补偿光纤及其应用前景

open access: yesGuangtongxin yanjiu, 1994
本文从理论上阐述了色散补偿光纤的工作原理和特点。并综述了国外探索实验研究的现状及试用情况。
陈永诗, 邹林森
doaj  

the Applicability of the Monetary Policy Rules and the Volatility of the Asset Price——Based on the New Keynesian DSGE Model [PDF]

open access: yes, 2016
货币政策规则对于中央银行而言,是具有连续性和系统性的指导准则,对货币政策规则的研究,关乎国家经济的有效调控。从上世纪20年代美国的经济大萧条到上世纪90年代日本的房地产泡沫,从2008年全球经济危机中我国的4万亿计划到近年我国央行为应对股票市场剧烈波动频繁进行公开市场操作,无一不说明着货币政策始终关注资产价格波动,稳定资产价格波动是央行的一大政策目标。 本文通过文献综述阐述了货币政策规则对货币当局的重要性,并介绍了学者们对货币政策规则的研究,归纳对比了国内学者们关于中国货币政策规则适用性的研究 ...
余挺
core  

Electrospun Carbon Nanofiber‐Based Multifunctional Electrocatalysts for Zinc‐Air Batteries and Overall Water Splitting: Fabrication, Progress, and Perspective

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The development of high‐performance and stable electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) plays a critical role in advancing clean energy technologies, including metal‐air batteries and hydrogen production through overall water splitting.
Chen‐Yu Cai   +4 more
wiley   +1 more source

心脏肌钙蛋白Ⅰ:心肌损伤的敏感性和特异性指标

open access: yesZhongguo shiyan zhenduanxue, 1998
心脏肌钙蛋白I:心肌损伤的敏感性和特异性指标朱玉胜综述吕元审校心脏肌钙蛋白I(cTnI)是一项新的心肌损伤的特异性和敏感性指标。本文仅就cTnI在心肌损伤时的变化进行综述,并与CK-MB、肌红蛋白、肌钙蛋白T进行比较。1995年美国FDA批准cTnI...
朱玉胜
doaj  

Study on the Gender Wage Gap in China [PDF]

open access: yes, 2016
自我国首次提出男女平等这一项基本国策以来,我国广大女性的社会地位得到了极大的提高。但我国社会仍面临着男女工资存在巨大差异这一严峻问题。男女工资差异不仅造成了社会不公,引发了社会矛盾,更不利于我国的经济发展,社会的和谐进步。因此,研究中国男女工资差异问题,具有重要的现实意义。 目前学术界关于性别工资差异的研究,视角大多集中在均值或者工资分布的变化上,并且,有关工资差异影响因素的分析大多停留在,剔除性别而单独对因素的讨论上,并没有考虑这些因素对工资的影响是因性别的不同而不同的 ...
李晓雯
core  

Rational Design of Multifunctional Nano–Architected Coatings for Bipolar Plates in Proton Exchange Membrane Fuel Cells

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Proton exchange membrane fuel cells (PEMFCs) require advanced bipolar plate coatings to enhance efficiency, durability, and commercialization potential. This review presents a systematic framework for evaluating and designing bipolar plate coatings, integrating material selection, performance metrics, deposition techniques, and future ...
Shijie Li   +12 more
wiley   +1 more source

Single-Factor and Total-Factor Energy Efficiency of Fujian in China [PDF]

open access: yes, 2015
随着世界经济的快速发展,能源需求日益增长,温室气体排放与日剧增,开展国家、区域层面的能源效率研究和能源政策制定已成为全世界的热点。中国提出到2015年单位GDP能耗、碳排放比2010年分别下降16%、17%,到2030年非化石能源占一次能源消费比重提高至20%的目标。在以福建省为主体的海峡西岸经济区跨越式发展的关键时期,传统粗放式发展模式带来了能源“消费大省”和“生产小省”的矛盾日益突出,本文在这样的选题背景下研究中国福建能源效率,对实现福建省乃至全国的经济、社会、能源 ...
汪叶俊
core  

Interface Issues of Inorganic Solid‐State Electrolytes in Secondary Magnesium Batteries

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Solid‐state magnesium batteries (SSMBs) have gained significant attention as promising candidates for next‐generation safe energy storage systems because of the abundance of magnesium (Mg) in the earth's crust, superior energy density, and inherent nonflammability.
Jiren Wang   +9 more
wiley   +1 more source

Home - About - Disclaimer - Privacy