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China's long-term low carbon transition pathway under the urbanization process

Advances in Climate Change Research 2019年第4期10卷 240-249页

作者： LIU Jun-Ling WANG Ke xiahou qin-rui LIU Fang-Ming ZOU Ji KONG Ying School of Economics and Management Harbin Institute of Technology(Shenzhen)Shenzhen518055China Tsinghua-Berkeley Shenzhen Institute Tsinghua UniversityShenzhen518055China School of Environment&Natural Resources Renmin University of ChinaBeijing100872China Department of Economics York UniversityTorontoM3J1P3Canada

This study develops a comprehensive analysis framework and socio-economic energy system model that interlinks demographic change and energy system in order to analyze the urbanization process and its relation with China's long-term CO2 emissions trend as China'economy enters the“new normal”*** results show that,around 300 million people are expected to migrate from rural areas to urban areas by 2050 following a trend,in which people are moving gradually from small and medium city groups to large and super city *** migration trend together with the improvement in living standard will promote China's infrastructure construction,industry production,and energy service demand *** the Business as Usual(BAU)scenario,total primary energy consumption in China will reach 8.4 Gtce by 2050,energyrelated CO2 emissions will increase to 17.6 Gt,which is 83%higher than the 2013 *** in the Low Carbon Transition(LCT)scenario with technology innovation,the total primary energy demand for China in 2050 could be controlled at^6 Gtce;CO2 emissions would peak during 2020—2025,and be reduced by 78%by 2050 compared to the BAU *** the transition process,non-fossil fuel power generation and energy efficiency technologies have the largest mitigation *** and power sectors would peak first before 2020,followed by the building and transport sectors which are projected to peak around *** total additional capital investment required for LCT would account for 1.5%of ***,it is technologically and economically feasible for China to implement new urbanization strategy.

关键词： Urbanization Population migration Consumption demand Low carbon transition Bottom-up model

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中国工业部门中长期低碳发展路径研究

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中国软科学 2019年第11期 31-41,54页

作者：刘俊伶夏侯沁蕊王克邹骥孔英哈尔滨工业大学(深圳)经济管理学院广东深圳518055 清华—伯克利深圳学院环境科学与新能源技术研究中心低碳经济与金融风险分析研究实验室广东深圳518055 中国人民大学环境学院北京100872 约克大学经济系加拿大M3J1P3

工业是中国最大的能源消耗与碳排放部门,对低碳转型意义重大。本文通过构建包含工业模块的"自下而上"能源系统模型PECE-LIU2017,展望工业部门的发展与排放趋势,探讨不同情景下中长期低碳转型的可能路径。结果显示:①在充分发挥减排潜力... 详细信息

工业是中国最大的能源消耗与碳排放部门,对低碳转型意义重大。本文通过构建包含工业模块的"自下而上"能源系统模型PECE-LIU2017,展望工业部门的发展与排放趋势,探讨不同情景下中长期低碳转型的可能路径。结果显示:①在充分发挥减排潜力的条件下,工业部门有望在2020年达到碳排放峰值,2050年排放量由基准情景的59亿吨下降到21亿吨;②能效提升是减排的关键,生产结构和能源结构优化有着重要贡献,但要实现2℃温升目标,还需在2030年后推广应用CCS技术;③工业部门的技术普遍较为成熟,2050年大部分技术的边际减排成本为负,节约的费用可以弥补新增投资,但CCS等技术仍需政府支持;④2050年前,工业部门能够以不到总低碳投资需求的10%贡献25.62%的减排量,低碳转型具有技术可行性与经济可接受性。中国工业部门应坚持在近期以成熟的能效技术为主、中长期以低碳技术创新为核心的发展方向,走出一条率先达峰及深度脱碳的转型路径。

关键词：工业部门自下而上模型碳减排低碳发展路径

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城镇化背景下中国长期低碳转型路径研究

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气候变化研究进展 2020年第3期16卷 355-366页

作者：刘俊伶王克夏侯沁蕊刘芳名邹骥孔英哈尔滨工业大学(深圳)经济管理学院深圳518055 清华大学清华-伯克利深圳学院深圳518055 中国人民大学环境学院北京100872 约克大学经济系多伦多M3J1P3加拿大

在中国经济步入新常态之际,为了研究城镇化背景下的长期碳排放趋势,构建了人口变动与能源系统互动的综合分析框架与社会经济-能源系统模型。结果显示,从2014年至2050年,预计有3亿人口从农村流向城市,并呈现从中小型城市逐步向大型和特... 详细信息

在中国经济步入新常态之际,为了研究城镇化背景下的长期碳排放趋势,构建了人口变动与能源系统互动的综合分析框架与社会经济-能源系统模型。结果显示,从2014年至2050年,预计有3亿人口从农村流向城市,并呈现从中小型城市逐步向大型和特大型城市汇集的趋势。人口流动趋势与人民生活质量改善结合,推动中国基础设施建设、工业产品生产和能源服务需求增长。基准情景下,2050年中国一次能源消费总量达到84亿tce,能源相关CO2排放达到176亿t,比2013年增长83%;而在低碳转型情景下,通过技术创新,2050年中国一次能源消费需求可以控制在61亿tce左右,CO2排放在2020—2025年间达峰,2050年比基准情景降低78%。低碳转型过程中,非化石能源电力和能效技术的减排潜力最大,工业和电力部门率先在2020年达峰,建筑和交通①将在2030年左右达峰。实现低碳转型所需新增固定投资占GDP的1.5%,不会给国民经济带来重大负担。中国实施新型城镇化战略具有技术和经济可行性。

关键词：城镇化人口流动消费需求低碳转型自下而上模型

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Diameter and Temperature Dependence of Thermal Conductivity of Single-Walled Carbon Nanotubes

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Chinese Physics Letters 2011年第6期28卷 210-213页

作者： PAN rui-qin Faculty of Science Shanghai Institute of TechnologyShanghai 201418

Temperature and diameter dependence of the thermal conductivity of several armchair single-walled carbon nanotubes(SWNTs)are studied by nonequilibrium molecular dynamics method with Brenner II *** thermal conductivities are calculated at temperatures from 100 K to 600 *** is found that the thermal conductivity decreases as the temperature increases and increases as the diameter of SWNT *** results demonstrate that these two phenomena are due to the onset of the Umklapp process.

关键词： process conductivity thermal

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Si掺杂对Ga_(2)O_(3)/BP异质结光电性能调控的第一性原理研究

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原子与分子物理学报 2025年第4期42卷 131-137页

作者：李佳宏郝增瑞薛瑞鑫阚红梅关玉琴内蒙古工业大学理学院呼和浩特010010

近年来,氧化镓(Ga_(2)O_(3))是新一代超宽禁带(4.9 eV)半导体,基于优越的热稳定和化学稳定性、高击穿场强和可见光透过率等优点,在日盲紫外探测器和透明光电器件领域中引起了广泛的关注.但是,Ga_(2)O_(3)基光电器件存在迁移率较低而限... 详细信息

近年来,氧化镓(Ga_(2)O_(3))是新一代超宽禁带(4.9 eV)半导体,基于优越的热稳定和化学稳定性、高击穿场强和可见光透过率等优点,在日盲紫外探测器和透明光电器件领域中引起了广泛的关注.但是,Ga_(2)O_(3)基光电器件存在迁移率较低而限制其应用的现象,而构建合适的Ga_(2)O_(3)异质结是改善光电探测器的光电性能的有效手段之一.基于第一性原理构建β-Ga_(2)O_(3)/BP异质结模型,研究了氧空位(Vo)和Si掺杂对β-Ga_(2)O_(3)/BP异质结光电性质的调控以及相关机理.结果显示:β-Ga_(2)O_(3)/BP异质结结构有效降低β-Ga_(2)O_(3)功函数,提高灵敏度,Si掺杂降低结合能,增强稳定性;β-Ga_(2)O_(3)/BP异质结有效减小带隙,Si掺杂以及氧空位的存在,进一步减小带隙,增强光导电性,并且Si掺杂引起了光电导各向异性.此结果对改善Ga_(2)O_(3)基异质结光电性能提供理论参考.

关键词： β-Ga_(2)O_(3)/BP异质结缺陷光电性质第一性原理

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An improved de-interleaving algorithm of radar pulses based on SOFM with self-adaptive network topology

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Journal of Systems Engineering and Electronics 2020年第4期31卷 712-721页

作者： JIANG Wen FU Xiongjun CHANG Jiayun qin rui School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

As a core part of the electronic warfare(EW) system,de-interleaving is used to separate interleaved radar signals. As interleaved radar pulses become more complex and denser, intelligent classification of radar signals has become very important. The self-organizing feature map(SOFM) is an excellent artificial neural network, which has huge advantages in intelligent classification of complex data. However, the de-interleaving process based on SOFM is faced with the problems that the initialization of the map size relies on prior information and the network topology cannot be adaptively adjusted. In this paper, an SOFM with self-adaptive network topology(SANT-SOFM) algorithm is proposed to solve the above problems. The SANT-SOFM algorithm first proposes an adaptive proliferation algorithm to adjust the map size, so that the initialization of the map size is no longer dependent on prior information but is gradually adjusted with the input data. Then,structural optimization algorithms are proposed to gradually optimize the topology of the SOFM network in the iterative process,constructing an optimal SANT. Finally, the optimized SOFM network is used for de-interleaving radar signals. Simulation results show that SANT-SOFM could get excellent performance in complex EW environments and the probability of getting the optimal map size is over 95% in the absence of priori information.

关键词： de-interleaving self-organizing feature map(SOFM) self-adaptive network topology(SANT)

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Pronounced temporal changes in soil microbial community and nitrogen transformation caused by benzalkonium chloride

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Journal of Environmental Sciences 2023年第4期126卷 827-835页

作者： rui Yang Shaohong Zhou Lilan Zhang Cunli qin State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China

As one typical cationic disinfectant, quaternary ammonium compounds(QACs) were approved for surface disinfection in the coronavirus disease 2019 pandemic and then unintentionally or intentionally released into the surrounding environment. Concerningly, it is still unclear how the soil microbial community succession happens and the nitrogen(N)cycling processes alter when exposed to QACs. In this study, one common QAC(benzalkonium chloride(BAC) was selected as the target contaminant, and its effects on the temporal changes in soil microbial community structure and nitrogen transformation processes were determined by q PCR and 16S r RNA sequencing-based methods. The results showed that the aerobic microbial degradation of BAC in the two different soils followed first-order kinetics with a half-life(4.92 vs. 17.33 days) highly dependent on the properties of the soil. BAC activated the abundance of N fixation gene(nif H) and nitrification genes(AOA and AOB) in the soil and inhibited that of denitrification gene(nar G). BAC exposure resulted in the decrease of the alpha diversity of soil microbial community and the enrichment of Crenarchaeota and Proteobacteria. This study demonstrates that BAC degradation is accompanied by changes in soil microbial community structure and N transformation capacity.

关键词： Benzalkonium chloride Soil Degradation kinetics Microbial community structure Nitrogen cycling

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Night-time radiative warming using the atmosphere

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Light(Science & Applications) 2023年第12期12卷 2589-2596页

作者： Yining Zhu Yiwei Zhou Bing qin rui qin Min Qiu Qiang Li State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China

Night-time warming is vital for human production and daily *** methods like active heaters are energy-intensive,while passive insulating films possess restrictions regarding space consumption and the lack of heat *** this work,a nanophotonic-based night-time warming strategy that passively inhibits thermal radiation of objects while actively harnessing that of atmosphere is *** using a photonic-engineered thin film that exhibits high reflectivity(~0.91)in the atmospheric transparent band(8-14μm)and high absorptivity(~0.7)in the atmospheric radiative band(5-8 and 14-16μm),temperature rise of 2.1℃/4.4℃compared to typical low-e film and broadband absorber is ***,net heat loss as low as 9Wm-2 is experimentally observed,compared to 16 and 39Wm-2 for low-e film and broadband absorber,*** strategy suggests an innovative way for sustainable warming,thus contributes to addressing the challenges of climate change and promoting global carbon neutrality.

关键词： passive radiative absorber

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Littlewood Paley g-function on the Heisenberg Group

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Acta Mathematica Sinica,English Series 2006年第1期22卷 95-100页

作者： He Ping LIU rui qin MA LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

We consider the g-function related to a class of radial functions which gives a characterization of the L^p-norm of a function on the Heisenberg group.

关键词： Heisenberg group g-function

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Recent Climate Warming of Central China Reflected by Temperature-sensitive Tree Growth in the Eastern qinling Mountains and its Linkages to the Pacific and Atlantic Oceans

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Journal of Mountain Science 2015年第2期12卷 396-403页

作者： CHEN Feng ZHANG rui-bo WANG Hui-qin qin Li Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration Institute of Desert Meteorology China Meteorological Administration Xinjiang Laboratory of Tree-Ring Ecology Institute of Desert Meteorology China Meteorological Administration College of Earth and Environmental Science Lanzhou University

We have developed a 202-year tree-ring width chronology of Shensi fir(Abies chensiensis) growing in an open canopy forest at the treeline of the eastern qinling Mountains. Climate response analyses revealed that the ring width of Shensi fir trees is primarily controlled by the range of temperature from February–June. The regression model that we used for statistical temperature reconstruction passed the leave-one-out cross-validation used in dendroclimatology, resulting in a quality-controlled February–June reconstruction for the eastern qinling Mountains. The model accounts for 36.7% of the instrumental temperature variance during the period of 1960–2012. Warm springs and early summers occurred during AD 1870–1873, 1909–1914, 1927–1958 and 1997–2012, while the periods of AD 1874–1908, 1915–1926 and 1959–1996 were relatively cold. Spatial climate correlation analyses with gridded land surface data revealed that our temperature reconstruction contains a strong regional temperature signal for central China. The linkages of ourtemperature reconstruction with sea surface temperature in the Atlantic and Pacific oceans suggest the connection of regional temperature variations to large-scale ocean–atmosphere–land circulation. Preliminary analysis of links between large-scale climatic variation and the temperature reconstruction also shows that there is a relationship between extremes in spring and early summer temperature and anomalous atmospheric circulation in the qinling Mountains. Overall, our study provides reliable information for the research of past temperature variability in the qinling Mountains, China.

关键词： qinling Mountains Dendroclimatology Abies chensiensis Tree ring Temperature reconstruction

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