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How topography and neighbor shape the fate of trees in subtropical forest restoration:environmental filtering and resource competition drive natural regeneration

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Forest Ecosystems 2024年第1期11卷 73-86页

作者： Haonan Zhang Xingshuo Zhang Yingying Lv Yanyan Ni Baokun Xu Xiangnan Han Xiao Cao Qingpei Yang Wanggu Xu Zhedong Qian Innovative Research Team for Forest Restoration Mechanisms Nanjing Institute of Environmental SciencesMinistry of Ecology and Environment(MEE)Nanjing 210042China College of Forestry Jiangxi Agricultural UniversityNanchang 330045China

The structure of plant communities at local scales depends on both the spatial heterogeneity of abiotic environmental factors and the biotic interactions within the ***,although environmental filtering due to microtopographic heterogeneity and resource competition among plants caused by spatial variation in tree density and size are considered to be very important in explaining the mechanisms of community assembly,their effects on the processes of individual mortality and recruitment in natural forest regeneration,as well as their relative contributions,are still poorly *** address this,we established a 12-ha permanent plot in a subtropical evergreen broad-leaved forest area and measured microtopographic variables such as elevation,slope,aspect,and terrain position index(TPI)using a total *** monitored the individual mortality and recruitment in forest natural regeneration through repeated surveys at 5-year *** fitted spatial covariance models to jointly use multiple factors from three groups of variables(microtopographic effect,neighborhood density effects,neighborhood size effects)as explanatory variables to analyze their roles in driving the mortality and recruitment of all individual and 12 dominant species in forest natural regeneration at the neighborhood *** results show that:(1)In the crucial early stages of secondary forest restoration,natural regeneration is influenced by a synergy of environmental filtering,due to microtopographic heterogeneity,and resource competition among plants.(2)For distinct species responses,evergreen dominant species'mortality is largely explained by neighborhood effects,while deciduous species are more affected by topographic ***,the adverse effects of larger conspecific trees on younger trees indicate a pattern of competitive pressure leading to mortality among regenerating trees,such pattern emphasis the influence of parent trees on natural regeneration.(3)As trees g

关键词： Natural regeneration Microtopography Neighborhood effects Mortality and recruitment

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基于利益相关者理论的元江县原生稻保护案例分析

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Journal of Resources and Ecology 2024年第2期15卷 258-266页

作者：闻艺刘莹徐继伟孙蓉王华斌刘青松王海徐锐鲁艺云南师范大学昆明650500 峨山彝族自治县化念镇规划建设和环境保护中心云南玉溪653200

能在较高海拔生长的原生稻蕴藏优质基因和遗传特性,但近年来受到杂交稻和普通水稻普遍推广的挤压,其分布状况堪忧,因此无论从种质资源保护角度还是从经济价值角度对原生稻开展保护均具有重要意义。文章引入利益相关者理论,借助包含地方... 详细信息

能在较高海拔生长的原生稻蕴藏优质基因和遗传特性,但近年来受到杂交稻和普通水稻普遍推广的挤压,其分布状况堪忧,因此无论从种质资源保护角度还是从经济价值角度对原生稻开展保护均具有重要意义。文章引入利益相关者理论,借助包含地方政府、企业或合作社、农户的三方演化博弈模型开展分析,对元江县开展原生稻保护工作提出建议,并为其他地区农作物品种生物多样性和粮农遗传资源保护与可持续利用提供参考。研究结果表明,短期内原生稻的保护亟需地方政府的鼓励支持、宣传引导。政府对企业和农户的补贴力度和收购、种植原生稻的积极性之间有密切关系。政府对企业补贴系数较小时,企业存在趋向“不收购”;政府对企业的补贴系数越高,企业达到演化稳定状态的速度越快,而政府与农户达到演化稳定状态的速度反而减慢。政府对农户的补贴系数越大,农户、企业与合作社达到演化稳定状态的速度越快,政府达到演化稳定状态的速度反而减慢;政府对农户的补贴系数较大时可能会产生农户趋向“不种植”、政府趋向“不鼓励”的情况。因此,政府在决策过程中要仔细权衡给予企业、合作社和农户的补贴,并结合地方财政状况和原生稻恢复种植、原位保护的现状。

关键词：原生稻品种保护利益相关者理论可持续农业乡村振兴

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Wireless Positioning:Technologies,Applications,Challenges,and Future Development Trends

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 1135-1166页

作者： Xingwang Li Hua Pang Geng Li Junjie Jiang Hui Zhang Changfei Gu Dong Yuan School of Physics and Electronic Information Engineering University of Henan PolytechnicJiaozuo454000China Jiaozuo Key Laboratory of Crow-Sensing Network Jiaozuo454000China Institute of Mining Engineering Guizhou Institute of TechnologyGuiyang550003China Coal Supervision Department Panzhou Energy BureauPanzhou553599China

The development of the fifth-generation(5G)mobile communication systems has entered the commercialization stage.5G has a high data rate,low latency,and high reliability that can meet the basic demands of most industries and daily life,such as the Internet of Things(IoT),intelligent transportation systems,positioning,and *** continuous progress and development of society have aroused wide *** accuracy is the core demand for the applications,especially in complex environments such as airports,warehouses,supermarkets,and ***,many factors also affect the accuracy of positioning in those environments,for example,multipath effects,non-line-of-sight,and clock synchronization *** paper provides a comprehensive review of the existing works about positioning for the future wireless network and discusses its key techniques and algorithms,as well as the current development and future *** first outline the current traditional positioning technologies and algorithms,which are discussed and analyzed with the relevant *** addition,we also discuss application scenarios for wireless *** comparing different positioning systems,the challenges and future development directions of existing wireless positioning systems are prospected.

关键词： 5G wireless positioning reconfigurable intelligent surface Internet of Vehicles

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CO_(2)capture costs of chemical looping combustion of biomass:A comparison of natural and synthetic oxygen carrier

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Journal of Energy Chemistry 2024年第5期92卷 296-310页

作者： Benjamin Fleiß Juraj Priscak Martin Hammerschmid Josef Fuchs Stefan Müller Hermann Hofbauer Institute of Chemical Environmental and Bioscience EngineeringTU WienVienna1060 ViennaAustria BEST–Bioenergy and Sustainable Technologies GmbH Graz8010 StyriaAustria

Chemical looping combustion has the potential to be an efficient and low-cost technology capable of contributing to the reduction of the atmospheric concentration of CO_(2) in order to reach the 1.5/2°C goal and mitigate climate *** this process,a metal oxide is used as oxygen carrier in a dual fluidized bed to generate clean CO_(2) via combustion of *** commonly,natural ores or synthetic materials are used as oxygen carrier whereas both must meet special requirements for the conversion of solid *** oxygen carriers are characterized by higher reactivity at the expense of higher costs versus the lower-cost natural *** determine the viability of both possibilities,a techno-economic comparison of a synthetic material based on manganese,iron,and copper to the natural ore ilmenite was *** synthetic oxygen carrier was characterized and tested in a pilot plant,where high combustion efficiencies up to 98.4%and carbon capture rates up to 98.5%were *** techno-economic assessment resulted in CO_(2) capture costs of 75 and 40€/tCO_(2) for the synthetic and natural ore route respectively,whereas a sensitivity analysis showed the high impact of production costs and attrition rates of the synthetic *** synthetic oxygen carrier could break even with the natural ore in case of lower production costs and attrition rates,which could be reached by adapting the production process and recycling *** comparison to state-of-the-art technologies,it is demonstrated that both routes are viable and the capture cost of CO_(2) could be reduced by implementing the chemical looping combustion technology.

关键词： Chemical looping combustion BECCS Techno-economic assessment CO_(2)capture costs Oxygen carrier development Synthetic materials Ilmenite

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Chinese pangolins (Manis pentadactyla) are not functionally extinct in China

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Zoological Research(Diversity and Conservation) 2024年第1期1卷 79-81页

作者： Zhi-Cheng Liu Peng Cen Jian-Kun Sun Fu-Hua Zhang Amna Mahmood Chen Lei Shi-Bao Wu School of Life Sciences South China Normal UniversityGuangzhouGuangdong 510631China

DEAR EDITOR,The key features of functional extinction include continuous reproductive failure,lack of new recruitment,and persistent population decline(Jarićet al.,2016;Roberts et al.,2017).However,the conclusion of functional extinction for the Chinese pangolin(Manis pentadactyla)by the China Biodiversity Conservation and Green Development Foundation(CBC-GDF)based on preliminary field information is unconvincing as they did not assess reproductive function or new individual recruitment of Chinese pangolin populations(Supplementary Materials).

关键词： extinction Roberts Manis

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Hyphae-mediated bioassembly of carbon fibers derivatives for advanced battery energy storage

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Carbon Energy 2024年第6期6卷 140-150页

作者： Lei Huang Zhong Qiu Ping Liu Xinhui Xia Feng Cao Xinping He Chen Wang Wangjun Wan Yongqi Zhang Yang Xia Wenkui Zhang Minghua Chen Jiancang Zhou Department of Critical Care Medicine Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhouChina State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang ProvinceSchool of Materials Science&EngineeringZhejiang UniversityHangzhouChina College of Materials Science&Engineering Zhejiang University of TechnologyHangzhouChina State Key Laboratory of Photocatalysis on Energy and environment Fuzhou UniversityFuzhouChina Department of Engineering Technology Huzhou CollegeHuzhouChina Zhejiang Academy of Science and Technology for Inspection&Quarantine HangzhouZhejiangChina Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengduChina Key Laboratory of Engineering Dielectric and Applications(ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbinChina

Ingenious design and fabrication of advanced carbon-based sulfur cathodes are extremely important to the development of high-energy lithium-sulfur batteries,which hold promise as the next-generation power ***,for the first time,we report a novel versatile hyphae-mediated biological assembly technology to achieve scale production of hyphae carbon fibers(HCFs)derivatives,in which different components including carbon,metal compounds,and semiconductors can be homogeneously assembled with HCFs to form composite *** mechanism of biological adsorption assembly is also *** a representative,reduced graphene oxides(rGOs)decorated with hollow carbon spheres(HCSs)successfully co-assemble with HCFs to form HCSs@rGOs/HCFs hosts for sulfur *** this unique architecture,not only large accommodation space for sulfur but also restrained volume expansion and fast charge transport paths are ***,multiscale physical barriers plus chemisorption sites are simultaneously established to anchor soluble lithium ***,the designed HCSs@rGOs/HCFs-S cathodes deliver a high capacity(1189 mA h g^(-1)at 0.1 C)and good high-rate capability(686 mA h g^(-1)at 5 C).Our work provides a new approach for the preparation of high-performance carbon-based electrodes for energy storage devices.

关键词： bioassembly carbon fibers energy storage graphene lithium-sulfur batteries

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Size Effect on the Radiation Stability Silicon Dioxide Sphere Particles

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Journal of Harbin Institute of Technology(New Series) 2024年第4期31卷 1-12页

作者： Vitaly Neshchimenko Chundong Li Mikhail Mikhailov Jinpeng Lv Laboratory of Radiation Stability Evaluation of Thermal Control Coatings Amur State UniversityBlagoveshchensk 675000Russia Science and Technology on Material Performance Evaluating in Space environment Laboratory Harbin Institute of TechnologyHarbin 150001China Radiation and Space Materials Laboratory Tomsk State University of Control Systems and Radio-ElectronicsTomsk 634050Russia Department of Material Science and Technology Nanjing University of Aeronautics&AstronauticsNanjing 210016China

The effect of protons(E = 100 keV,F = 5×10^(15) cm^(-2)) exposure on the diffuse reflectance spectra of the SiO_(2 )with different size particles in wavelength range from 250 to 2500 nm have been *** were nanosphere,submicrosphere,microsphere and submacrosphere,as well as solid micro-and *** synthesis of the particles was carried out by the formation of silica shells and dissolution of the polystyrene core *** surface morphology,surface area and crystal structure of the particles have been *** evaluating the changes of the solar absorptance,it was found that the radiation stability of the micro-and submacro-hollow particles is higher than that of the other nanostructured particles,except for solid *** low radiation stability of the hollow microparticles is due to the large void inside the hollow particles where radiation defects are not formed.

关键词： silicon dioxide hollow particles spectral reflectance irradiation

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DTPA络合动力学诱导P507强化分离钇、铒和铥(英文)

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Transactions of Nonferrous Metals Society of China 2024年

作者：隋娜苗书凯沈昊崔凯辉王佳琦黄焜北京科技大学冶金与生态工程学院自然资源部离子型稀土资源与环境重点实验室

基于非平衡动力学萃取技术，研究了不同的二乙三胺五乙酸（DTPA）添加顺序下稀土离子与DTPA的络合动力学。结果表明，在萃取开始时加入DTPA，稀土Tm/Er和Y/Er之间的分离系数均高于萃取前预先加入DTPA时对应的分离系数。稀土Y、Er、Tm离... 详细信息

基于非平衡动力学萃取技术，研究了不同的二乙三胺五乙酸（DTPA）添加顺序下稀土离子与DTPA的络合动力学。结果表明，在萃取开始时加入DTPA，稀土Tm/Er和Y/Er之间的分离系数均高于萃取前预先加入DTPA时对应的分离系数。稀土Y、Er、Tm离子的萃取优先顺序为Tm>Y>Er。通过停留光谱法从正向络合物形成速率和逆向络合物解离速率上查明了络合动力学差异的本质和动力学强化分离机理，用于研究Y、Er、Tm离子与DTPA的络合动力学。研究发现表观络合速率常数随着水溶液pH的增加开始逐渐降低，而随着DTPA浓度的增加而逐渐增加。根据计算得到的Y、Er、Tm在不同pH值下的络合动力学速率常数，验证了萃取优先顺序Tm b> Y>Er的出现。

关键词：稀土萃取络合动力学二乙三胺五乙酸(DTPA) 停留光谱

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比较三种稳定剂对FeS纳米颗粒的稳定效果及对水土中镉的固定与去除性能的影响

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Journal of Central South University 2024年第4期31卷 1064-1075页

作者：田舒婷赵东叶霍丽娟马骏杨睿 Department of environmental Science School of Environment and ResourcesTaiyuan University of Science and TechnologyTaiyuan 030024China environmental Engineering Program Department of Civil&Environmental EngineeringAuburn UniversityAuburnAL 36849USA Department of Civil Constructionand Environmental EngineeringSan Diego State UniversitySan DiegoCA 92182USA

本研究评估了三种多糖稳定剂(羧甲基纤维素钠(CMC)、羧甲基淀粉钠(CMS)和一种水溶性淀粉)用于稳定FeS纳米颗粒的有效性,并测试了相应稳定化纳米颗粒在水和土壤中固定Cd^(2+)的性能。使用0.010 wt%CMC、0.025 wt%CMS或0.065 wt%淀粉可获... 详细信息

本研究评估了三种多糖稳定剂(羧甲基纤维素钠(CMC)、羧甲基淀粉钠(CMS)和一种水溶性淀粉)用于稳定FeS纳米颗粒的有效性,并测试了相应稳定化纳米颗粒在水和土壤中固定Cd^(2+)的性能。使用0.010 wt%CMC、0.025 wt%CMS或0.065 wt%淀粉可获得完全稳定的FeS纳米颗粒(100 mg/L FeS)。CMC-FeS表现出较高的zeta负电位,淀粉-FeS保持中性,而CMS-FeS则表现出中等负电位。CMCFeS对Cd^(2+)的吸附速率最快,吸附容量也最高。当用100 mg/L CMC-FeS或CMS-FeS处理一种含Cd土壤(58.3 mg/kg Cd)后,Cd的TCLP浸出率分别降低了88.4%和68.0%。CMC-FeS和CMS-FeS均可在模型土壤中运移,显示出其在土壤中原位固定Cd^(2+)方面的潜力。土壤穿透曲线实验表明,CMC-FeS在4.5个孔体积,CMS-FeS在约25个孔体积处几乎完全穿透。柱实验结果表明,当用55个孔体积的CMC-FeS或CMS-FeS悬浮液(100 mg/L)处理该含Cd土壤后,Cd的水浸出率分别降低了98.2%和98.0%。根据目标污染物、材料在土壤中的传输特性和材料成本,可找到这三种稳定剂在土壤修复中的最佳应用。

关键词：硫化铁纳米颗粒稳定剂重金属污染物固定土壤修复地下水污染

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Greenhouse gas reduction of co-benefit-type wastewater treatment system for fish-processing industry: A real-scale case study in Indonesia

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Water Science and Engineering 2023年第3期16卷 271-279页

作者： Yoshiteru Hamatani Takahiro Watari Masashi Hatamoto Takashi Yamaguchi Tjandra Setiadi Toshihiko Konda Nihon Suido Consultants Co. LtdTokyo 163-1122Japan Department of Civil and environmental Engineering Nagaoka University of TechnologyNiigata 940-2188Japan Department of Chemical Engineering Hanoi University of Science and TechnologyHanoi 11615Vietnam Department of Science of Technology Innovation Nagaoka University of TechnologyNiigata 940-2188Japan Department of Chemical Engineering Institut Teknologi BandungJl.Ganesa 10Bandung 40132Indonesia

This study examined the application of co-benefit-type wastewater treatment technology in the fish-processing industry. Given that there was a dearth of information on fish-processing industrial wastewater in Indonesia, site surveys were conducted. For the entire fish-processing industry throughout the country, the dissemination rate of wastewater treatment facilities was less than 50%. Using a co-benefit approach, a real-scale swim-bed technology (SBT) and a system combining an anaerobic baffled reactor (ABR) with SBT (ABR–SBT) were installed in a fishmeal processing factory in Bali, Indonesia, and the wastewater system process performance was evaluated. In a business-as-usual scenario, the estimated chemical oxygen demand load and greenhouse gas (GHG) emissions from wastewater from the Indonesian fish-processing industry were 33 000 tons per year and 220 000 tons of equivalent CO_(2) per year, respectively. On the other hand, the GHG emissions in the co-benefit scenarios of the SBT system and ABR–SBT system were 98 149 and 26 720 tons per year, respectively. Therefore, introducing co-benefit-type wastewater treatment to Indonesia’s fish-processing industry would significantly reduce pollution loads and GHG emissions.

关键词： Indonesian fish-processing industry Co-benefit wastewater treatment Greenhouse gas emission mitigation Anaerobic baffled reactor Swim-bed technology

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