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Fundamental Research 2024年第1期4卷 167-177页

作者： Xin Sun Han Hao Yong Geng Zongwei Liu fuquan zhao State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China Belfer Center for Science and International Affairs Harvard UniversityCambridgeMA 02138United States Tsinghua-Rio Tinto Joint Research Center for Resources Energy and Sustainable Development Tsinghua UniversityBeijing 100084China School of International and Public Affairs Shanghai Jiao Tong UniversityShanghai 200240China

Lithium-ion battery(LIB)is the key technology for climate change *** sustainability of LIB supply chain has caused widespread concern since the material utilization efficiency of LIB supply chain has not been well *** study aims to fill this research gap by conducting a dynamic material flow analysis of lithium in China from 2015 to *** indicate that within the temporal boundary,lithium flow and in-use stock grew significantly in China due to the rapid development of the EV market,with lithium flow in domestic production of basic chemicals increasing by 614%to 100 kt,end-use consumption increasing by 160%to 35 kt,and in-use stock increasing by 62%to 195 *** has been a net importer of lithium,of which cumulative imports and exports were 343 kt and 169 kt,*** addition,103 kt of lithium was converted to inventories or was lost during the processing from 2015 to *** optimizing inventory and processing,developing substitutes for lithium for non-battery applications,and improving lithium recycling,China's net import dependency of lithium could be reduced from 27%-86%to 0%-16%.Our study demonstrates that it is urgent to improve material utilization efficiency so that the lithium resource supply can be secured.

关键词： Lithium Lithium-ion battery Critical material Supply chain Material flow analysis

基于模糊C均值聚类的空—地—井垂直重力梯度数据反演方法

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石油地球物理勘探 2024年第3期59卷 629-639页

作者：张显侯振隆赵福权秦朋波赵信阳王家辉东北大学资源与土木工程学院辽宁沈阳110819 中国冶金地质总局青岛地质勘查院山东青岛266109 广州海洋地质调查局广东广州511458

通过重力梯度数据三维反演能够获得地下密度结构模型,用于地质资源勘探等领域。航空、地面和井中观测的重力梯度数据含有不同频率的信息,通过数据联合可以降低反演多解性,提高成像分辨率。对于具有复杂形态的地下异常体,目前这种多尺度... 详细信息

通过重力梯度数据三维反演能够获得地下密度结构模型,用于地质资源勘探等领域。航空、地面和井中观测的重力梯度数据含有不同频率的信息,通过数据联合可以降低反演多解性,提高成像分辨率。对于具有复杂形态的地下异常体,目前这种多尺度数据联合反演的纵向空间分辨率,尤其是异常体底部的成像分辨率有待提升。针对该问题,开展了航空—地面—井中垂直重力梯度数据的联合反演方法研究。首先,在正则化反演中引入模糊C均值聚类算法,通过在迭代过程中加入聚类约束降低多解性;其次,联合航空、地面和井中垂直重力梯度数据,提出一种联合反演方法,并使用GPU加速计算;然后,将反演应用于理论模型数据与美国文顿盐丘地区重力梯度数据,验证方法的效果,并讨论了井位置对结果的影响;最后,对基于GPU加速的并行反演方法进行性能分析。数据试验证明了模糊C均值聚类算法能够降低反演的多解性,通过联合反演能够获得准确的密度分布,该方法具有一定的抗噪能力;使用异常旁井和穿异常井数据的成像分辨率更高。计算的文顿盐丘地区密度分布与其他学者的结论相近,证明了方法是有效且可行的。试验还表明,GPU并行方法具有较高的加速比,提出的方法能够为地质找矿等研究提供技术支撑。

关键词：空—地—井垂直重力梯度密度反演模糊C均值聚类文顿盐丘 GPU加速

中国典型城市交通出行特征及未来道路交通演变研究

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现代城市研究 2024年第1期39卷 107-113页

作者：刘宗巍张望陈铭赵福全清华大学汽车产业与技术战略研究院、汽车安全与节能国家重点实验室中国汽车工程学会技术管理分会

为建立适合不同城市特点的交通体系,并明确定位汽车在其中承担的作用,文章首先从外部环境和交通工具两大维度出发,建立了表征城市整体交通出行情况的多层级评价体系;并基于一级指标的得分,对选取的9座中国典型城市的交通出行特征进行了... 详细信息

为建立适合不同城市特点的交通体系,并明确定位汽车在其中承担的作用,文章首先从外部环境和交通工具两大维度出发,建立了表征城市整体交通出行情况的多层级评价体系;并基于一级指标的得分,对选取的9座中国典型城市的交通出行特征进行了聚类分析,确定了城市的不同类型;然后通过多元回归分析,识别了影响城市道路交通的主要因素;最后通过相关因素变化的情景假设,预测了各城市道路交通效率可能的演变情况,并提出了相关政策建议。

关键词：城市交通出行道路拥堵评价指标体系聚类分析情景演变

Impact,Challenges and Prospect of Software-Defined Vehicles

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Automotive Innovation 2022年第2期5卷 180-194页

作者： Zongwei Liu Wang Zhang fuquan zhao State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijingChina Tsinghua Automotive Strategy Research Institute Tsinghua UniversityBeijingChina

Software-defined vehicles have been attracting increasing attentions owing to their impacts on the ecosystem of the automo-tive industry in terms of technologies,products,services and enterprise *** from the technology improve-ments of software-defined vehicles,this study systematically combs the impact of software-defined vehicles on the value ecology of automotive products and the automotive industrial ***,based on the current situation and demand of industrial development,the main challenges hindering the realization of software-defined vehicles are identified,including that traditional research and development models cannot adapt to the iterative demand of new automotive products;the transformation of enterprise capability faces multiple challenges;and many contradictions exist in the industrial division of ***,suggestions are put forward to address these challenges and provide decision-making recommendations for enterprises on strategy management.

关键词： Software-defined vehicle Industrial reconstruction Automotive industry Strategic suggestions

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简述萨病的防治

内蒙古民族大学学报（自然科学蒙古文版） 2024年第1期 44-47页

作者：宝丽尔苏布达赵福全不详

Development Trends of Transmissions for Hybrid Electric Vehicles Using an Optimized Energy Management Strategy

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Automotive Innovation 2018年第4期1卷 291-299页

作者： Tianze Shi fuquan zhao Han Hao Zongwei Liu Tsinghua Automotive Strategy Research Institute Tsinghua UniversityBeijing 100084China State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China

Energy conservation and emissions reduction have become increasingly significant for automobiles due to the severity of the current energy *** electric vehicle(HEV)technology is one of the most promising *** study investigated the total efficiency of a HEV *** improve the total efficiency,the engine should be regulated to work at its highest efficiency and drive the wheels directly as much as *** accomplish this,we developed an energy management strategy based on the direct drive area(DDA)of the engine’s efficiency *** typical HEV models were built to compare the fuel consumption using DDA and rule-based ***,the function of the HEV transmission system with DDA was *** transmission in a HEV should regulate the engine to work at its highest efficiency as much as possible,which is rather different than the regulation in an internal combustion engine *** functional change may lead to transmission systems with fewer gears but optimal gear *** this trend is realized,the manufacturing cost of HEVs could be largely reduced.

关键词： HEV Direct drive area Energy management Transmission cost reduction

Analysis of Typical Automakers’ Strategies for Meeting the Dual-Credit Regulations Regarding CAFC and NEVs

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Automotive Innovation 2018年第1期1卷 15-23页

作者： Yue Wang fuquan zhao Yinshuo Yuan Han Hao Zongwei Liu Tsinghua Automotive Strategy Research Institute State Key Laboratory of Automotive Safety and EnergyTsinghua UniversityBeijing 100084China

The parallel corporate average fuel consumption(CAFC)and new energy vehicle(NEV)credit schemes that have been introduced by the Ministry of Industry and Information Technology of China is an innovative attempt to simultaneously regulate conventional gasoline vehicles(CGVs)and NEVs in the passenger vehicle sector that is expected to function as a long-term management mechanism for CGVs to be more energy-efficient and NEVs to be *** will have a significant impact on trends in China’s automotive industry and automakers’business *** the cases of four typical automakers with different levels of average fuel economy in their CGVs and advanced NEV production,scenario analysis has been applied to generate these automakers’alternatives in relation to compliance with the dual-credit regulations in force from 2017 to 2020 based on the Interim Measures on the Joint Management of CAFC and NEV Credits(Draft).These automakers’alternative approaches to compliance are ***,in view of the financial losses as a result of halted production if they fail to comply,the values of CAFC and NEV credits and corresponding influencing factors are analyzed from the automakers’***,the most cost-effective compliance strategies for these automakers are summarized and suggested improvements in the regulations are proposed for the government.

关键词： Automotive industry Dual-credit management Credit trading market Fuel consumption New energy vehicle

Abating transport GHG emissions by hydrogen fuel cell vehicles： Chances for the developing world

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Frontiers in Energy 2018年第3期12卷 466-480页

作者： Han HAO Zhexuan MU Zongwei LIU fuquan zhao State Key Laboratory of Automotive Safety and Energy ChinaAutomotive Energy Research Center Tsinghua University Beijing100084 China State Key Laboratory of Automotive Safety and Energy TsinghuaUniversity Beijing 100084 China

Fuel cell vehicles, as the most promising clean vehicle technology for the future, represent the major chances for the developing world to avoid high-carbon lock-in in the transportation sector. In this paper, by taking China as an example, the unique advantages for China to deploy fuel cell vehicles are reviewed. Subsequently, this paper analyzes the greenhouse gas （GHG） emissions from 19 fuel cell vehicle utilization pathways by using the life cycle assessment approach. The results show that with the current grid mix in China, hydrogen from water electro- lysis has the highest GHG emissions, at 3.10 kgCO2/km, while by-product hydrogen from the chlor-alkali industry has the lowest level, at 0.08 kgCO2/krn. Regarding hydrogen storage and transportation, a combination of gas-hydrogen road transportation and single compression in the refueling station has the lowest GHG emissions. Regarding vehicle operation, GHG emissions from indirect methanol fuel cell are proved to be lower than those from direct hydrogen fuel cells. It is recommended that although fuel cell vehicles are promising for the developing world in reducing GHG emissions, the vehicle technology and hydrogen production issues should be well addressed to ensure the life-cycle low-carbon performance.

关键词： hydrogen fuel cell vehicle life cycle assessment energy consumption greenhouse gas (GHG) emissions China

The special shaped laser spot for driving indirect-drive hohlraum with multi-beam incidence

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High Power Laser Science and Engineering 2017年第3期5卷 49-54页

作者： Ping Li Sai Jin Runchang zhao Wei Wang fuquan Li Mingzhong Li Jingqin Su Xiaofeng Wei Research Center of Laser Fusion of China Academy of Engineering Physics

In indirect drive, reducing peak intensity of a single beam and controlling overlap of multi-beams are two opposite requirements for laser focal spot design. In this paper, an improved laser spot design technique for indirect drive built upon the geometric structures of laser propagation into hohlraum has been introduced. The proposed technique is able to generate appropriate continuous phase plate(CPP) producing a special shaped spot that can balance the opposite requirements. The corresponding CPP does not bring difficulties to the design and fabrication. Phase aberrations are more sensitive to the special shaped spot; however, it can be tolerable for the current beam control level.

关键词： beam aberration CPP focal spot optimization ICF Laser systems

Shenzhen Mobility Research for Different Travel Scenes

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Shenzhen Mobility Research for Different Travel Scenes