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Toward a predictable cask theory of species extinction assessment in the Anthropocene

FRONTIERS IN ECOLOGY AND THE ENVIRONMENT 2024年第3期22卷 e2714页

作者： chen, Youhua Dai, Qiang Zhou, Jin Tang, Danni Li, De-Zhu Wei, fuwen Zhan, Xiangjiang Chinese Acad Sci Chengdu Inst Biol Chengdu Peoples R China Chinese Acad Sci Inst Zool Key Lab Anim Ecol & Conservat Biol Beijing Peoples R China Univ Chinese Acad Sci Beijing Peoples R China Chinese Acad Sci Germplasm Bank Wild Species Kunming Inst Bot Kunming Peoples R China Jiangxi Agr Univ Coll Forestry Prov Key Lab Conservat Biol Nanchang Peoples R China

Predicting species extinction is challenging in the context of climate change. The International Union for Conservation of Nature (IUCN) Red List of Threatened Species assesses species extinction risk by accounting for population size and global range of taxa, but this approach neglects the importance of genetic variability. Here, we propose a life strategy index (LSI) for predicting the extinction risks of species under climate change. The LSI is composed of three fundamental and independent components: namely, evolutionary potential, ecological potential, and colonization potential. The LSI constitutes a so-called "cask" theory of species extinction, which predicts that extinction likelihood is determined by the relative deficiency of any of the three components. The indicative variables used to construct the proposed LSI make the index applicable to assessments of (and predictions for) the extinction risk of different taxa in the face of climate change, which can inform management and conservation of imperiled species in a more scientific and precise manner.

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Cu@Sn@Ag core-shell particles preform for power device packaging under harsh environments

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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 2021年第11期32卷 14703-14714页

作者： Liu, Jiahao Liu, Hao Yu, fuwen Wang, Xinjie Wang, Jianqiang Hang, Chunjin chen, Hongtao Li, Mingyu Harbin Inst Technol Shenzhen Dept Mat Sci & Engn Shenzhen 518055 Guangdong Peoples R China China Elect Prod Reliabil & Environm Testing Res Guangzhou 510610 Peoples R China Beijing Santel Technol & Trading Corp Beijing 100854 Peoples R China Harbin Inst Technol State Key Lab Adv Welding & Joining Harbin 150001 Peoples R China

This paper presents a novel die attach material for power device packaging based on transient liquid phase (TLP) bonding. Through two-step electroless plating, the Cu@Sn@Ag particles were prepared, and realize interconnection with Cu Substrates after being compressed into preform. Due to the large specific surface area of the core-shell particles, the reflow time can be reduced to 15 min at a low temperature of 250 degrees C under a pressure of 3 MPa to form high-remelting-point intermetallic compounds (IMCs), which can withstand a high temperature of at least 475 degrees C. Due to the protection of the Ag coating, the Cu@Sn@Ag particles exhibited excellent oxidation resistance, and the bonding process can be carried out in the atmosphere. Then, the service reliability of the bondlines was evaluated in harsh environments, such as high temperature and humidity, high temperature storing, and thermal shock. The average resistivity of the bondlines was increased from 4.6 +/- 1.4 to 8.5 +/- 3.8 mu omega cm after being stored at high temperature (85 degrees C) and high humidity (85% RH) environment for 14 days. After storing at 300 degrees C for 15 days, the porosity of bondline increased from 6.8 to 10.8%, and the average shear strength decreased from 30.5 +/- 6.3 to 22.3 +/- 5.6 MPa. After thermal shock between - 40 and 125 degrees C for 500 cycles, the bonding rate decreased from 99.9 to 84.2%. Moreover, the short-circuit time of electrochemical migration under 60 V voltage was extended to 145 s. The bondline based on the novel core-shell particles exhibited excellent performance as a die attach material under harsh environments.

关键词： Optical and Electronic Materials Characterization and Evaluation of Materials

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轮轨横移黏着作用下轨道车辆轮对-齿轮传动系统动力学研究

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中南大学学报（自然科学版） 2025年第2期56卷 807-818页

作者：樊林放徐向阳田富文倪元庆陈兆玮重庆交通大学交通与运输学院重庆400074 重庆交通大学交通与运输学院重庆400074 重庆交通大学机电与车辆工程学院重庆400074 重庆交通大学机电与车辆工程学院重庆400074

针对曲线段轮对横移黏着作用下轮对-齿轮传动系统动态特性不明等问题,本文通过曲线段轮对横移受力和空间接触几何分析,结合改进的Kik-Piotrowski理论和FaStrip算法,提出曲线段轮轨横移动态黏着接触模型;综合考虑轮轨动态黏着激励、时变... 详细信息

针对曲线段轮对横移黏着作用下轮对-齿轮传动系统动态特性不明等问题,本文通过曲线段轮对横移受力和空间接触几何分析,结合改进的Kik-Piotrowski理论和FaStrip算法,提出曲线段轮轨横移动态黏着接触模型;综合考虑轮轨动态黏着激励、时变啮合刚度、非线性轴承接触力等因素,建立轮轨横移黏着作用下轮对-齿轮传动系统动力学模型;最后分析不同曲线段下轮轨黏着接触特性以及曲线半径、运行速度对传动系统动态特性的影响.研究结果表明:当横移量为0 mm时,左右轮轨接触斑对称且面积相等,两侧最大法向接触应力均为155.1 MPa,且位于接触斑正中心,两侧最大切向接触应力均为40.2 MPa,且均位于接触斑左侧滑移区;随着正向横移量增大,左侧轮轨法、切向接触应力幅值先减小后增大,右侧法向、切向应力幅值逐渐减小,且分布位置向轮对中心偏移,接触斑滑动区占比逐渐增大,轮轨黏着接触性能逐渐恶化;随着曲线半径减小和运行速度增加,齿轮啮合力、轴承接触力和左右侧横向轮轨力都随之增大,从而加剧系统振动,并且在内外耦合激励影响下,左侧轴承接触力和轮轨力均比右侧的高.

关键词：轨道车辆轮对横移轮轨黏着传动系统动态特性

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CODIS: Benchmarking Context-Dependent Visual Comprehension for Multimodal Large Language Models 62

CODIS: Benchmarking Context-Dependent Visual Comprehension f...

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62nd Annual Meeting of the Association-for-Computational-Linguistics (ACL) / Student Research Workshop (SRW)

作者： Luc, fuwen chen, Chi Wan, Zihao Kang, Zhaolu Yan, Qidong Li, Yingjie Wang, Xiaolong Wang, Siyu Wang, Ziyue Ma, Xiaoyue Li, Peng Ma, Ning Sun, Maosong Liu, Yang Tsinghua Univ Inst AI Dept Comp Sci & Technol Beijing Peoples R China Tsinghua Univ Inst AI Ind Res AIR Beijing Peoples R China Shanghai Artificial Intelligence Lab Shanghai Peoples R China Jiangsu Collaborat Innovat Ctr Language Competenc Nanjing Jiangsu Peoples R China Northwest Minzu Univ Minist Educ Key Lab Linguist & Cultural Comp Beijing Peoples R China Jilin Univ Coll Software Changchun Peoples R China Chinese Acad Sci Inst Comp Technol Beijing Peoples R China

ISBN: (纸本)9798891760943

Multimodal large language models (MLLMs) have demonstrated promising results in a variety of tasks that combine vision and language. As these models become more integral to research and applications, conducting comprehensive evaluations of their capabilities has grown increasingly important. However, most existing benchmarks fail to consider that, in certain situations, images need to be interpreted within a broader context. In this work, we introduce a new benchmark, named as CODIS, designed to assess the ability of models to use context provided in free-form text to enhance visual comprehension. Our findings indicate that MLLMs consistently fall short of human performance on this benchmark. Further analysis confirms that these models struggle to effectively extract and utilize contextual information to improve their understanding of images. This underscores the pressing need to enhance the ability of MLLMs to comprehend visuals in a contextdependent manner. View our project website at https://***/CODIS.

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Solvent Effects on Linear and Multi-branched Bithiazole-based Derivatives Fluorescence Studied by Steady-state and Time-resovled Spectroscopy

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RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021年第8期95卷 1641-1645页

作者： Shi, fuwen Ni, Minghao Wang, Zhiquan He, Nannan Li, Xiang Hua, Jianli Li, Bo chen, Ye East China Normal Univ Dept Optoelect Key Lab Polar Mat & Devices MOE Shanghai 200241 Peoples R China East China Univ Sci & Technol Key Lab Adv Mat Shanghai 200237 Peoples R China East China Univ Sci & Technol Inst Fine Chem Shanghai 200237 Peoples R China

Steady-state absorption, emission, and time-resolved spectroscopy were utilized to study the dynamics of excited states of linear and multi-branched bithiazole derivatives in different solvents at room temperature. In the studied compounds, triphenylamine and bithiazole groups act as donor and acceptor, respectively. BTZ-I and II have similar linear molecular structures, while BTZ-III and BTZ-IV have multi-branched structures. The difference is that the donor and acceptor units are connected by a single bond or a triple bond, respectively. With increase in solvent polarity, the fluorescence spectra exhibit a red shift and the fluorescence lifetime increases. Our results suggest there is intra-molecular charge transfer (ICT) processes in these four samples.

关键词： ICT solvent effect time-resolved spectroscopy

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Global dispersal and adaptive evolution of domestic cattle:a genomic perspective

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Stress Biology 2023年第1期3卷 98-110页

作者： Xiaoting Xia Kaixing Qu Yan Wang Mikkel-Holger SSinding fuwen Wang Quratulain Hanif Zulfiqar Ahmed Johannes A.Lenstra Jianlin Han Chuzhao Lei Ningbo chen Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China Academy of Science and Technology Chuxiong Normal UniversityChuxiong 675000China Qingdao Municipal Bureau of Agriculture and Rural Affairs Qingdao 266000China Section for Computational and RNA Biology Department of BiologyUniversity of CopenhagenCopenhagen 1350Denmark National Institute for Biotechnology and Genetic Engineering FaisalabadPakistan Faculty of Veterinary and Animal Sciences University of Poonch RawalakotAzad Jammu and Kashmir 12350Pakistan Faculty of Veterinary Medicine Utrecht UniversityUtrechtThe Netherlands Livestock Genetic Program International Livestock Research Institute(ILRI)Nairobi 00100Kenya CAAS-ILRI Joint Laboratory On Livestock and Forage Genetic Resources Institute of Animal ScienceChinese Academy of Agricultural Sciences(CAAS)Beijing 100193China

Domestic cattle have spread across the globe and inhabit variable and unpredictable *** have been exposed to a plethora of selective pressures and have adapted to a variety of local ecological and management conditions,including UV exposure,diseases,and stall-feeding *** selective pressures have resulted in unique and important phenotypic and genetic differences among modern cattle breeds/*** efforts to sequence the genomes of local and commercial cattle breeds/populations,along with the growing availability of ancient bovid DNA data,have significantly advanced our understanding of the genomic architecture,recent evolution of complex traits,common diseases,and local adaptation in ***,we review the origin and spread of domestic cattle and illustrate the environmental adaptations of local cattle breeds/populations.

关键词： Cattle Origin Domestication Migration route Environmental adaptation Selective pressure

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高层胶合木框架-混凝土核心筒结构振动台试验研究

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土木工程学报 2023年第12期56卷 49-58,70页

作者：王明谦许清风冷予冰张富文陈溪陈玲珠上海市建筑科学研究院有限公司上海市工程结构安全重点实验室上海200032

为研究高层胶合木框架-混凝土核心筒结构的抗震性能,设计制作一个缩尺比例为1∶3的12层高层胶合木结构模型,并对模型开展振动台试验。试验中考虑了7度多遇至9度罕遇烈度水平,得到不同水准地震作用下模型的加速度响应、位移响应和层间剪... 详细信息

为研究高层胶合木框架-混凝土核心筒结构的抗震性能,设计制作一个缩尺比例为1∶3的12层高层胶合木结构模型,并对模型开展振动台试验。试验中考虑了7度多遇至9度罕遇烈度水平,得到不同水准地震作用下模型的加速度响应、位移响应和层间剪力分布等,并基于白噪声扫频结果确定模型的动力特性。试验结果表明,高层胶合木框架-混凝土核心筒结构模型的主要破坏集中于混凝土核心筒,胶合木框架的损伤相对有限。模型具有良好的耗能能力,罕遇地震作用下模型的阻尼比均超过10%。模型的各楼层加速度放大系数在0.5~3.0,结构顶层的加速度放大系数明显高于其他楼层。7度多遇地震作用下,模型的最大层间位移角在多数工况下均能满足现行规范的规定,说明高层胶合木框架-混凝土核心筒结构具有良好的抗侧刚度。在8度~9度罕遇地震作用下,模型并未出现倒塌破坏,说明高层胶合木框架-混凝土核心筒结构能满足“大震不倒”的抗震设防目标。

关键词：胶合木框架高层结构混凝土核心筒振动台试验抗震性能

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Power Generation Scheduling for a Hydro-Wind-Solar Hybrid System: A Systematic Survey and Prospect

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ENERGIES 2022年第22期15卷 8747页

作者： chen, Chaoyang Liu, Hualing Xiao, Yong Zhu, Fagen Ding, Li Yang, fuwen Hunan Univ Sci & Technol Sch Informat & Elect Engn Xiangtan 411201 Peoples R China China Southern Power Grid Res Inst China Southern Power Grid Guangzhou 510630 Peoples R China China Datang Corp Beijing 100033 Peoples R China Wuhan Univ Sch Elect Engn & Automat Dept Artificial Intelligence & Automat Wuhan 430072 Peoples R China Griffith Univ Sch Engn & Built Environm Gold Coast Qld 4222 Australia

In the past two decades, clean energy such as hydro, wind, and solar power has achieved significant development under the "green recovery" global goal, and it may become the key method for countries to realize a low-carbon energy system. Here, the development of renewable energy power generation, the typical hydro-wind-photovoltaic complementary practical project, is summarized, and some key problems in complementary systems such as the description and prediction of the power generation law in large-scale stations, risk management, and coordinated operation are analyzed. In terms of these problems, this paper systematically summarizes the research methods and characteristics of a hydro-wind-solar hybrid system and expounds upon the technical realization process from the prediction and description of wind and solar power station cluster output, the risks brought about by large-scale renewable energy grid-connected operation, and the long-term and short-term coordination modeling and resolution thoughts on the hydro-wind-solar hybrid system in cluster mode. Finally, based on the aforementioned analysis, the existing research gaps are discussed from the standpoints of generation forecast, risk management, and cluster scheduling, and the future work outlook is presented accordingly. A hybrid system that combines hydro, wind, and solar energy is emerging as a way to make up for each other's shortcomings and will be a fruitful area of study in the future.

关键词： hydro-wind-solar system energy complementary optimal scheduling risk management

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The eco-friendly side of narcissism: The case of green marketing

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SUSTAINABLE DEVELOPMENT 2021年第6期29卷 1111-1122页

作者： Lin, Han chen, Lu Yuan, Ming Yu, Mingchuan Mao, Ye Tao, fuwen Nanjing Audit Univ Sch Engn Audit Jiangsu Key Lab Publ Project Audit Nanjing Peoples R China Nanjing Audit Univ Sch Informat Engn Jiangsu Key Lab Publ Project Audit Nanjing Peoples R China Guangzhou Univ Sch Management Guangzhou 510006 Peoples R China Shanghai Normal Univ Sch Finance & Business Shanghai Peoples R China Fudan Univ Sch Journalism Shanghai Peoples R China

The march toward marrying good business practice with sustainability in the global marketing contexts is articulated with the hope of decoupling consumption and affluence from environmental deterioration. However, the key question, whether and how chief executive officers' (CEO) psychological characteristics exert its influence on corporate marketing activities with relation to environmental conservation, is still unsolved. The current study aimed at examining how the personality traits of CEOs affect corporate green marketing program (GMP), with primary regard to CEO narcissism. On the basis of a moderated mediation analysis on a batch of survey data from a sample of manufacturing firms in China, the findings showed that narcissistic CEOs are often associated with the higher level of the corporate green marketing program. Besides, corporate environmental strategy (ES) plays a role of mediator in the relationship between CEO narcissism and the implementation of green marketing. Furthermore, regulatory pressure not only significantly drives corporate environmental strategy and green marketing program but also moderates the relationships among CEO narcissism, corporate environmental strategy, and green marketing program. This study shines light on the establishment of management mode, which could illuminate both business practitioners and policymakers on the governance of sustainability.

关键词： environmental strategy green marketing narcissism stakeholder engagement sustainable development upper echelons

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Position: Towards Unified Alignment Between Agents, Humans, and Environment 41

Position: Towards Unified Alignment Between Agents, Humans, ...

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41st International Conference on Machine Learning, ICML 2024

作者： Yang, Zonghan Liu, An Liu, Zijun Liu, Kaiming Xiong, Fangzhou Wang, Yile Yang, Zeyuan Hu, Qingyuan chen, Xinrui Zhang, Zhenhe Luo, fuwen Guo, Zhicheng Li, Peng Liu, Yang Dept. of Comp. Sci. & Tech. Institute for AI Tsinghua University Beijing China Tsinghua University Beijing China Jiangsu Collaborative Innovation Center for Language Competence Jiangsu China

The rapid progress of foundation models has led to the prosperity of autonomous agents, which leverage the universal capabilities of foundation models to conduct reasoning, decision-making, and environmental interaction. However, the efficacy of agents remains limited when operating in intricate, realistic environments. In this work, we introduce the principles of Unified Alignment for Agents (UA2), which advocate for the simultaneous alignment of agents with human intentions, environmental dynamics, and self-constraints such as the limitation of monetary budgets. From the perspective of UA2, we review the current agent research and highlight the neglected factors in existing agent benchmarks and method candidates. We also conduct proof-of-concept studies by introducing realistic features to WebShop (Yao et al., 2022a), including user profiles to demonstrate intentions, personalized reranking for complex environmental dynamics, and runtime cost statistics to reflect self-constraints. We then follow the principles of UA2 to propose an initial design of our agent and benchmark its performance with several candidate baselines in the retrofitted WebShop. The extensive experimental results further prove the importance of the principles of UA2. Our research sheds light on the next steps of autonomous agent research with improved general problem-solving abilities. Copyright 2024 by the author(s)

关键词： Budget control

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