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Improving landscape connectivity through habitat restoration:application for Asian elephant conservation in Xishuangbanna Prefecture,China

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Integrative Zoology 2024年第2期19卷 319-335页

作者： Bin WAN Wenwen LI Peng LIU Nian YANG shang chen Xianming GUO Bin WANG Li ZHANG Key Laboratory for Biodiversity Science and Ecological Engineering Ministry of EducationCollege of Life SciencesBeijing Normal UniversityBeijingChina Research Center for Coastal Zone Science and Marine Development Strategy First Institute of OceanographyMinistry of Natural ResourcesQingdaoChina School of Biological Sciences The University of Hong KongPokfulamHong KongChina Research Institute of Xishuangbanna National Nature Reserve JinghongChina Xishuangbanna Asian Elephant Conservation and Management Center JinghongChina

Habitat restoration is an effective method for improving landscape connectivity,which can reduce habitat fragmentation.Maintaining landscape connectivity could promote connections between habitat,which is extremely essential to preserve gene flow and population viability.This study proposes a methodological framework to analyze landscape connectivity for Asian elephant habitat conservation,aiming to provide practical options for reducing habitat fragmentation and improving habitat connectivity.Our approach involved combining a species distribution model using MaxEnt and landscape functional connectivity models using graph theory to assess the impact on connectivity improvement via farmland/plantation restoration as habitat.The results showed that:(1)there were 119 suitable habitat patches of Asian elephant covering a total area of 1952.41 km^(2).(2)The connectivity between habitats improved significantly after vegetation restoration and the gain first decreased and then increased with the increase of dispersal distance.(3)The first few new habitat patches that were identified played an important role in improving connectivity,and the variation rate of connectivity gradually leveled off as the number of new habitats increased.(4)Prioritization of the 25 best new habitat patches increased connectivity from 0.54%to 5.59%as the dispersal distance increased and mainly was located between two Asian elephant distribution regions and two components.Establishment of new habitat patches was effective for improving or restoring connectivity.Our findings can be used as guidance for improving the studied fragmented Asian elephant habitats,and they can also be used as a reference for the habitat restoration of other endangered species heavily affected by habitat fragmentation.

关键词： Asian elephant connectivity habitat restoration habitat suitability landscape graphs

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Atomistic study on the microscopic mechanism of grain boundary embrittlement induced by small dense helium bubbles in iron

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Nuclear Science and Techniques 2024年第3期35卷 84-95页

作者： Lei Peng Yong-Jie Sun Jing-Yi Shi Yi-Fei Liu shang-Ming chen Liu-Liu Li State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic steel,which is a candidate structural material for fusion reactors.In order to elucidate the susceptibility of different grain boundaries(GBs)to helium-induced embrittlement,the tensile fracture processes of 10 types of GBs with and without helium bubbles in body-centered cubic(bcc)iron at the relevant service temperature of 600 K were investigated via molecular dynamics methods.The results indicate that in the absence of helium bubbles,the GBs studied here can be classified into two distinct categories:brittle GBs and ductile GBs.The atomic scale analysis shows that the plastic deformation of ductile GB at high temperatures originates from complex plastic deformation mechanisms,including the Bain/Burgers path phase transition and deformation twinning,in which the Bain path phase transition is the most dominant plastic deformation mechanism.However,the presence of helium bubbles severely inhibits the plastic deformation channels of the GBs,resulting in a significant decrease in elongation at fractures.For bubble-decorated GBs,the ultimate tensile strength increases with the increase in the misorientation angle.Interestingly,the coherent twin boundary∑3{112}was found to maintain relatively high fracture strength and maximum failure strain under the influence of helium bubbles.

关键词： Helium bubble Grain boundary Embrittlement Reduced activation ferritic martensitic steel Molecular dynamics Bain path

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A potential giant gallium deposit hosted in the tailing dam of the Fankou Zn-Pb deposit in northern Guangdong Province, South China

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China Geology 2024年第1期7卷 157-160页

作者： Peng-peng Yu Zhao-bin Hu Yi Zheng Lan-xuan Guo Shi-yuan Ouyang Gui-qiang Yuan shang-zhou chen cheng-ming Wang Xi chen School of Earth Sciences and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Lab of Geological Process and Mineral Resources Survey Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China Zhongjin Lingnan Nonfemet Co. LtdShenzhen 518000China

1.Objective The Fankou giant zinc(Zn)-lead(Pb)deposit in Guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(Guangdong Fankou Deposit Investigation Group,1980;Zhu XY et al.,2017).After 60 years of exploration and exploitation,the deposit has accumulated millions of tons of tailings.One interesting question is that what components are hosted in these tailings,and whether some key and critical metals such as gallium and germanium are extremely enriched and worth further comprehensive utilization.This motivated us to conduct an integrated set of field investigation,sampling,major-trace element analyses and reserve assessments about the Fankou tailings.In this contribution,we discover that the tailings contain a variety of metal elements such as zinc,lead and gallium with comprehensive utilization potential.These data can act as a scientific guidance for further exploration and utilization of the Fankou tailings,and aid to enhance the utilization efficiency of the key mineral resource in China.Our study also provide demonstration for future green mine construction in China.

关键词： deposit comprehensive Guangdong

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Grain boundary engineering for enhancing intergranular damage resistance of ferritic/martensitic steel P92

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Nuclear Science and Techniques 2024年第5期35卷 186-199页

作者： Lei Peng shang-Ming chen Jing-Yi Shi Yong-Jie Sun Yi-Fei Liu Yin-Zhong Shen Hong-Ya He Hui-Juan Wang Jie Tian State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China School of Materials Engineering Shanghai University of Engineering Science333 Long Teng RoadShanghai 201620China Experimental Center of Engineering and Material Science University of Science and Technology of ChinaHefei 230026China

Ferritic/martensitic(F/M)steel is widely used as a structural material in thermal and nuclear power plants.However,it is susceptible to intergranular damage,which is a critical issue,under service conditions.In this study,to improve the resistance to intergranular damage of F/M steel,a thermomechanical process(TMP)was employed to achieve a grain boundary engineering(GBE)microstructure in F/M steel P92.The TMP,including cold-rolling thickness reduction of 6%,9%,and 12%,followed by austenitization at 1323 K for 40 min and tempering at 1053 K for 45 min,was applied to the as-received(AR)P92 steel.The prior austenite grain(PAG)size,prior austenite grain boundary character distribution(GBCD),and connectivity of prior austenite grain boundaries(PAGBs)were investigated.Compared to the AR specimen,the PAG size did not change significantly.The fraction of coincident site lattice boundaries(CSLBs,3≤Σ≤29)and Σ3^(n) boundaries along PAGBs decreased with increasing reduction ratio because the recrystallization fraction increased with increasing reduction ratio.The PAGB connectivity of the 6%deformed specimen slightly deteriorated compared with that of the AR specimen.Moreover,potentiodynamic polarization studies revealed that the intergranular damage resistance of the studied steel could be improved by increasing the fraction of CSLBs along the PAGBs,indicating that the TMP,which involves low deformation,could enhance the intergranular damage resistance.

关键词： Grain boundary engineering Ferritic/martensitic steel Prior austenite grain boundary character distribution Grain boundary connectivity Intergranular damage resistance

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MOPCS: next-generation nucleic acid molecular biosensor

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National Science Review 2022年第9期9卷 139-141页

作者： Quan Liu shang chen Li Wang Zhaojun Duan Fuquan Xie Guojun Zhao Yunde Hou Dixian Luo Laboratory Medicine Center Huazhong University of Science and Technology Union Shenzhen Hospital(Nanshan Hospital) Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging School of Biomedical Engineering Shenzhen University Health Science Center National Institute for Viral Disease Control and Prevention China Center for Disease Control and Prevention Department of Laboratory Medicine Shenzhen Children's Hospital The Sixth Affiliated Hospital of Guangzhou Medical University Qingyuan City People's Hospital

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has had a huge impact on the world, causing millions of deaths and a serious blow to the global economy. SARS-CoV-2 can aack most body tissues with devastating consequences [1].e current global SARS-CoV-2 outbreak has exposed our shortcomings in the prevention and control of infectious diseases,

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孤网模式下水轮机调速系统广义预测控制应用方法

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水利学报 2024年第5期55卷 619-630页

作者：陈金保刘少华陈上邹屹东郑阳肖志怀武汉大学动力与机械学院湖北武汉430072 武汉大学水力机械过渡过程教育部重点实验室湖北武汉430072 南京南瑞继保电气有限公司江苏南京210000 中国长江电力股份有限公司三峡电厂湖北宜昌443000

针对孤网模式下水电机组PID控制策略鲁棒性差的缺点,提出基于双模型、实时反馈线性化、非线性特性补偿器和广义预测控制器的自适应广义预测控制策略(Adaptive Generalized Predictive Control,AGPC),以实现对水电站全工况实时最优控制... 详细信息

针对孤网模式下水电机组PID控制策略鲁棒性差的缺点,提出基于双模型、实时反馈线性化、非线性特性补偿器和广义预测控制器的自适应广义预测控制策略(Adaptive Generalized Predictive Control,AGPC),以实现对水电站全工况实时最优控制。首先基于BP神经网络和改进樽海鞘算法构建高精度非线性水轮机模型,并结合PID控制器、引水系统、随动系统、发电机等模块搭建非线性水轮机调节系统仿真平台,然后通过定量计算揭示广义预测控制器直接应用于非线性水轮机调节系统的不合理性。进一步,结合实时反馈线性化和基于预估控制信号设计的水轮机非线性特性补偿器,提出孤网模式下广义预测控制器在水电站应用策略。最后,搭建了基于AGPC的非线性水轮机调节系统仿真平台,并以某电站真实数据验证了所提控制策略适用性、可靠性以及优良的鲁棒性。

关键词：广义预测控制水电机组反馈线性化双模型非线性特性补偿器

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Haplotype-resolved and chromosome-scale genomes provide insights into co-adaptation between the Amur tiger and Amur leopard

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Zoological Research 2024年第3期45卷 464-467页

作者： Hai-Meng Li Bo-Yang Liu Min-Hui Shi Le Zhang shang-chen Yang Sunil Kumar Sahu Liang-Yu Cui Shan-Lin Liu Nicolas Dussex Yue Ma Dan Liu Wei-Yao Kong Hao-Rong Lu Yue Zhao Love Dalén Huan Liu Tian-Ming Lan Guang-Shun Jiang Yan-Chun Xu College of Wildlife and Protected Area Northeast Forestry UniversityHarbinHeilongjiang 150040China State Key Laboratory of Agricultural Genomics BGI ResearchShenzhenGuangdong 518083China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China College of Life Sciences Zhejiang UniversityHangzhouZhejiang 310058China BGI Research WuhanHubei 430074China Department of Entomology College of Plant ProtectionChina Agricultural UniversityBeijing 100193China Centre for Palaeogenetics Svante Arrhenius väg 20CStockholm 10691Sweden Department of Zoology Stockholm UniversityStockholm 10691Sweden Department of Bioinformatics and Genetics Swedish Museum of Natural HistoryStockholm 10691Sweden Heilongjiang Siberian Tiger Park HarbinHeilongjiang 150000China Jinlin Provincial Academy of Forestry Science ChangchunJilin 130033China China National GeneBank BGI ResearchShenzhenGuangdong 518120China Guangdong Provincial Key Laboratory of Genome Read and Write BGI ResearchShenzhenGuangdong 518083China BGI Life Science Joint Research Center Northeast Forestry UniversityHarbinHeilongjiang 150040China Feline Research Center of National Forestry and Grassland Administration College of Wildlife and Protected AreaNortheast Forestry UniversityHarbinHeilongjiang 150040China National Forestry and Grassland Administration Research Center of Engineering Technology for Wildlife Conservation and Utilization HarbinHeilongjiang 150040China

DEAR EDITOR,Big cats,such as Amur tigers(Panthera tigris altaica)and Amur leopards(P.pardus orientalis),are apex predator and have evolved specialized traits for hunting and carnivory(Moya et al.,2022),thus playing a crucial role in maintaining biodiversity and ecosystem integrity by regulating prey-predator dynamics.However,human-induced pressures,habitat fragmentation,and environmental alterations have restricted these species in small and isolated populations.Currently,all extant big cats are categorized as endangered or threatened according to their conservation status.Amur tigers and Amur leopards share overlapping geographic ranges,habitats,and certain prey species in the forests of Northeast Asia(Jiang et al.,2015).To reduce interspecies conflict,these carnivores exhibit differentiated dietary and temporal niches.Amur tigers predominantly prey on large ungulates,while Amur leopards hunt small to medium-sized animals(Sugimoto et al.,2016).Additionally,they occupy different temporal niches,with tigers being active at night and leopards more active during the day.Despite spatial and temporal niche partitioning,interspecific competition between these two species is inevitable.Tigers,benefiting from their greater size,have a competitive advantage over leopards,which can manifest in occasional leopard predation by tigers and declines in leopard populations with increasing tiger density(Jiang et al.,2015).Tigers also displace leopards from marginal habitats in nature reserves where they coexist.

关键词： habitat Panthera resolved

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黄河流域生态产品价值实现机制典型试点解析

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生态文明新时代 2024年第1期 52-55页

作者：陈尚自然资源部第一海洋研究所自然资源部、生态环境部、科技部专家库国家林业和草原局全国国家公园和自然保护地标准化技术委员会全国生态旅游标准化技术委员会

生态产品指生态系统提供人类社会和经济系统的最终产品和服务。森林、草地、湿地、冰川、沙漠、海洋、农田以及城市绿地等八类重要生态系统为人类提供物质、调节和文化三类生态产品。物质生态产品包括农产品、林产品、牧产品、水产品、... 详细信息

生态产品指生态系统提供人类社会和经济系统的最终产品和服务。森林、草地、湿地、冰川、沙漠、海洋、农田以及城市绿地等八类重要生态系统为人类提供物质、调节和文化三类生态产品。物质生态产品包括农产品、林产品、牧产品、水产品、生物能源、生物质原材料、氧气产品等。调节生态产品包括固碳、气候调节、空气净化、污水处理、水源涵养、洪水调蓄和海岸防护等。文化生态产品包括休闲娱乐、景观增值、康养、科学技术等知识产品,音乐、舞蹈、绘画、雕刻等艺术作品以及影视诗词等文学作品。

关键词：空气净化生物能源海岸防护气候调节生态系统水源涵养康养林产品

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全人类共同价值对西方现代意识形态的超越

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云南大学学报（社会科学版） 2024年第1期23卷 5-14页

作者：李尚宸张志丹华东政法大学上海201620 上海师范大学上海200234

由资本逻辑主导的西方现代意识形态存在于资本主义社会中。资本逻辑的全球化推动着西方现代意识形态的全球性扩张,西方现代意识形态在促进人类社会进步的同时也逐渐暴露出潜在危机,即主体性原则背后的工具理性畸变、个人主义导致人类生... 详细信息

由资本逻辑主导的西方现代意识形态存在于资本主义社会中。资本逻辑的全球化推动着西方现代意识形态的全球性扩张,西方现代意识形态在促进人类社会进步的同时也逐渐暴露出潜在危机,即主体性原则背后的工具理性畸变、个人主义导致人类生存共同体分离以及现代公共生活伦理规范缺失。基于马克思对资本逻辑的批判来确证西方现代意识形态的悖论,由此凸显人类命运共同体下全人类共同价值对西方现代意识形态超越的必然性与重要性。在当今全球化时代,全人类共同价值不断引领着人类命运共同体的构建、人类总体生存与发展的平等性追求以及全球治理新秩序的构筑,深刻彰显出对马克思主义理论的方法论自觉及人类前途命运的终极关怀。

关键词：全人类共同价值现代意识形态资本逻辑人类命运共同体

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配电网单相接地故障电弧特性分析及真型试验技术研究

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供用电 2024年第4期41卷 45-52页

作者：李辉李航陈尚朱程雯陈程邱进中国电力科学研究院有限公司湖北武汉430074 电网环境保护国家重点实验室湖北武汉430074 国网湖北省电力有限公司武汉供电公司湖北武汉430013

研究电弧故障特性对配电网稳定运行具有意义。通过仿真搭建Cassie和Mayr电弧模型,得出不同电压等级下适合配电网模拟电弧故障的模型,Cassie电弧适合高压配电网模拟电弧接地故障,Mayr电弧适合中压配电网模拟电弧接地故障。此外,在中国电... 详细信息

研究电弧故障特性对配电网稳定运行具有意义。通过仿真搭建Cassie和Mayr电弧模型,得出不同电压等级下适合配电网模拟电弧故障的模型,Cassie电弧适合高压配电网模拟电弧接地故障,Mayr电弧适合中压配电网模拟电弧接地故障。此外,在中国电力科学研究院有限公司特高压交流试验基地搭建10 kV真型配电网试验平台,验证仿真模型的正确性,试验验证与仿真实验结果相一致。结果表明:与中性点不接地方式相比,配电网在中性点消弧线圈接地条件下,对故障过电压抑制效果明显,可提高系统的安全可靠性。

关键词：单相接地故障电弧故障特性 Cassie电弧 Mayr电弧过电压

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