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Genesis of Silica-phosphatic Nodules with Small Shelly Fossils Preserved in the Lowermost Cambrian of South China

Acta Geologica Sinica(English Edition) 2022年第4期96卷 1294-1307页

作者： QIU hao FENG lianjun CHU Xuelei li Luoyang ZHANG Xingliang li Jinhua Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationCollege of Marine GeosciencesOcean University of ChinaQingdaoShandong 266100China State Key Laboratory of Continental Dynamics and Shaanxi Key Laboratory of Early life and Environments Department of GeologyNorthwest UniversityXi’an 710069China

Silica-phosphatic nodules are abundant in black shales of the Yanjiahe Formation in the Three Gorges Area of South China,which is correlated to the Fortunian Stage,Terreneuvian Series,Cambrian *** nodules are rich in small shelly fossils and hence attract the attention of numerous paleontologists and sedimentary ***,the genesis of the nodules and the preservation of the small shelly fossils are poorly *** we analyze morphological,structural,mineralogical and chemical features of the nodules in multiscale using a combination of micro-X-ray fluorescence spectroscopy,X-ray diffraction,scanning electron microscopy and confocal laser Raman *** reveal that nodules are concentric in chemical and mineralogical compositions,comprising a silica-phosphatic core encrusted sequentially by a phosphatic zone,a siliceous zone and a very thin pyrite outer *** black shales hosting the nodules demonstrate a laminated texture of alternating clayey and silty laminae,which were respectively deposited in sulfidic/less sulfidic,high/low production,intense/weak chemical weathering *** phosphogenesis of the nodules resulted in the phosphatization of small shelly fossils,which prevented the fossils from being dissolved during diagenesis,whereas the silica encrustation sealed the fossils within the nodules and thus protected the fossils from alteration by deep burial and surface weathering.

关键词： silica-phosphatic nodule small shelly fossils Yanjiahe Formation taphonomy Cambrian

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Effect of reduced graphene oxide-supported copper addition on electrochemical properties of La0.7Mg0.3Ni2.8Co0.5 electrodes

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Journal of Rare Earths 2019年第12期37卷 1312-1319页

作者： Xiantun Huang Zhiqiang Lan Jiacheng li hao Zhang Jin Guo Department of Materials Science and Engineering Baise CollegeBaise 533000China Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology College of Physics Science and TechnologyGuangxi UniversityNanning 530004China

The reduced graphene oxide-supported copper(Cu@rGO)nanocomposite was introduced to improve the electrochemical properties of La0.7Mg0.3Ni2.8Co0.5alloy *** results show that adding Cu@rGO nanocomposite with mass fractions of x wt%(x=0,3,6 and 9)to the alloy electrodes provides electrodes with maximum discharge capacities of 368.9 mAh/g(x=0),373.2 mAh/g(x=3),407.3 mAh/g(x=6)and 398.6 mAh/g(x=9),and high-rate dischargeabilities at a discharge current density of1200 mA/g of 40.5%(x=0),64.0%(x=3),82.0%(x=6)and 76.0%(x=9).The addition of Cu@rGO nanocomposite also provides alloy electrodes with hydrogen diffusion coefficients of 3.7×10-10 cm2/s(x=0),4.1×10-10 cm2/s(x=3),4.2×10-10 cm2/s(x=6)and 4.0×10-10 cm2/s(x=9).Clearly,the addition of 6 wt%Cu@rGO nanocomposite not only increases the electrochemical capacity of La0.7Mg0.3Ni2.8Co0.5 alloy electrodes,but also improves their electrochemical kinetic properties.

关键词： Kinetic properties Alloy electrode Electrochemical properties Graphene Rare earths

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Multi-aiming Strategy Design for Quadruple Prism Shaped Central Receiver in Solar Power Tower System

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 223-230页

作者： Wenjun Huang Yingmei Qi Fuxing Yi Dewen li hao Wang Department of Control Science and Engineering Zhejiang University Zhejiang Supcon Solar Technology CO. Ltd.

For solar power tower technology, the improvement of interception efficiency of heliostat field and the extension of central receiver U+02BC s life time are two technical difficulties. To the receiver, higher interception efficiency means more thermal shocks and stronger stresses of high temperatures mainly contribute to the reduction of receiver's life time. To address these problems, a semi-random distribution strategy is proposed to select the best aiming point of the heliostat, and the distribution of onedimensional array arranged on the centerline of the receiver is carried out for further optimization. It is shown by simulation that through our optimization the temperature distribution on the receiver surface becomes much more uniform while maintaining acceptable interception efficiency. © 2017 Chinese Association of Automation.

关键词： Prisms Solar energy

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A Simple Method for Fabrication of Bionic Superhydrophobic Zinc Coating with Crater-like Structures on Steel Substrate

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Journal of Bionic Engineering 2016年第4期13卷 622-630页

作者： hao li Sirong Yu Xiangxiang Han Shanbao Zhang Yan Zhao College of Mechanical and Electronic Engineering China University of Petroleum (East China) Qingdao 266580 China

Surface modification with superhydrophobicity is a popular and challenging research field on metals. In this work, a simple method was used to fabricate a bionic superhydrophobic zinc coating with crater-like structures on pipeline steel surface. This method involved electrodeposition of zinc coating and chemical reaction in perfluorooctanoic acid ethanol solution. The per- fluorooctanoic acid with low surface free energy was not only used for chemical etching but also used for fluorinated modifi- cation. The contact angle of water on such superhydrophobic zinc coating was up to 154.21°, and the sliding angle was less than 5° due to the micro crater-like structures and the low surface free energy. Moreover, the prepared superhydrophobic zinc coating demonstrated excellent self-cleaning property and great stability at room temperature, and the contact angle of water on this coating remained stable after storage in air for more than 80 days. This superhydrophobic zinc coating will open much wider applications of electrodeposition metal coating, including self-cleaning property, and can be easily extended to other metals.

关键词： bionic surface superhydrophobic coating electrodeposition crater-like structure self-cleaning

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Response of anaerobes to methyl fluoride,2-bromoethanesulfonate and hydrogen during acetate degradation

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Journal of Environmental Sciences 2013年第5期25卷 857-864页

作者： liping hao Fan L Lei li liming Shao Pinjing He State Key Laboratory of Pollution Control and Resource Reuse Tongji University Institute of Waste Treatment and Reclamation Tongji University

To use the selective inhibition method for quantitative analysis of acetate metabolism in methanogenic systems,the responses of microbial communities and metabolic activities,which were involved in anaerobic degradation of acetate,to the addition of methyl fluoride（CH3F）,2-bromoethanesulfonate（BES）and hydrogen were investigated in a thermophilic batch *** the methanogenic inhibitors,i.e.,CH3F and BES,showed their effectiveness on inhibiting CH4 production,whereas acetate metabolism other than acetoclastic methanogenesis was stimulated by BES,as reflected by the fluctuated acetate *** acetate oxidation was thermodynamically blocked by hydrogen（H2）,while H2-utilizing reactions as hydrogenotrophic methanogenesis and homoacetogenesis were correspondingly *** of PCR-DGGE fingerprinting showed that,CH3F did not influence the microbial populations ***,the BES and hydrogen notably altered the bacterial community structures and increased the *** gradually changed the methanogenic community structure by affecting the existence of different populations to different levels,whilst H2 greatly changed the abundance of different methanogenic populations,and induced growth of new species.

关键词： methanogenic inhibitor hydrogen thermophilic anaerobic digestion microbial diversity denaturing gradient gel electrophoresis(DGGE)

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Understanding the Moon's internal structure through moonquake observations and remote sensing technologies

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Science China Earth Sciences 2018年第8期61卷 995-1006页

作者： Weifeng hao Fei li Chi XIAO Jianguo YAN Mao YE Chinese Antarctic Center of Surveying and Mapping Wuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University

Explorations for the interior structure of the Moon mainly involve three technologies: the early gravitational observations via circumlunar satellites, the moonquake observations during the Apollo period, and the recent high-resolution remote sensing observations. Based on these technologies, we divided the development of the moon's interior structure into three stages. The first stage is the discovery of high-density anomalous masses(mascons) on the lunar surface with the low-order gravitational field models, which were obtained by observing perturbations of the early lunar orbital satellites. The second stage is the preliminary understanding of the layer structure with the help of moonquake observations during the Apollo period. The third stage is the deep understanding of the structure of the lunar crust, mantle, and core, with the use of high-resolution remote sensing data and the reassessment of moonquake data from the Apollo's mission. This paper gave detailed introduction and comments on different observation technologies, gathered data, and data processing techniques used at the three stages. In addition, this paper analyzed the current issues in the researches on the Moon's internal structure and discussed the prospects for future explorations.

关键词： Moon Mascon Moonquake Remote sensing Lunar internal structure

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Method for electromagnetic detection satellites scheduling based on genetic algorithm with alterable penalty coefficient

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Journal of Systems Engineering and Electronics 2014年第5期25卷 822-832页

作者： Jun li hao Chen Zhinong Zhong Ning Jing Jiangjiang Wu College of Electronic Science and Engineering National University of Defense Technology

The electromagnetic detection satellite （EDS） is a type of earth observation satellites （EOSs）. The Information collected by EDSs plays an important role in some fields, such as industry, science and military. The scheduling of EDSs is a complex combinatorial optimization problem. Current research mainly focuses on the scheduling of imaging satellites and SAR satellites, but little work has been done on the scheduling of EDSs for its specific characteristics. A multi-satellite scheduling model is established, in which the specific constrains of EDSs are considered, then a scheduling algorithm based on the genetic algorithm （GA） is proposed. To deal with the specific constrains of EDSs, a penalty function method is introduced. However, it is hard to determine the appropriate penalty coefficient in the penalty function. Therefore, an adaptive adjustment mechanism of the penalty coefficient is designed to solve the problem, as well as improve the scheduling results. Experimental results are used to demonstrate the correctness and practicability of the proposed scheduling algorithm.

关键词： electromagnetic detection satellite (EDS) scheduling genetic algorithm (GA) constraint handling penalty function method alterable penalty coefficient.

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Semi-Homogenous Generalization： Improving Homogenous Generalization for Privacy Preservation in Cloud Computing

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Journal of Computer Science & Technology 2016年第6期31卷 1124-1135页

作者： Xian-Mang He Xiaoyang SeanWang Dong li Yan-Ni hao School of Information Science and Engineering Ningbo University Ningbo 315211 China School of Computer Science Fudan University Shanghai 200433 China Information Center National Natural Science Foundation of China Beijing 100085 China

Data security is one of the leading concerns and primary challenges for cloud computing. This issue is getting more and more serious with the development of cloud computing. However, the existing privacy-preserving data sharing techniques either fail to prevent the leakage of privacy or incur huge amounts of information loss. In this paper, we propose a novel technique, termed as linking-based anonymity model, which achieves K-anonymity with quasi-identifiers groups （QI-groups） having a size less than K. In the meanwhile, a semi-homogenous generalization is introduced to be against the attack incurred by homogenous generalization. To implement linking-based anonymization model, we propose a simple yet efficient heuristic local recoding method. Extensive experiments on real datasets are also conducted to show that the utility has been significantly improved by our approach compared with the state-of-the-art methods.

关键词： privacy preservation cloud computing linking-based anonymization semi-homogenous homogenous generalization

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Recent progress in defect engineering for kesterite solar cells

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Science China(Physics,Mechanics & Astronomy) 2023年第1期66卷 18-33页

作者： Kaiwen Sun Jialiang Huang Jianjun li Chang Yan Xiaojing hao Australian Centre for Advanced Photovoltaics School of Photovoltaic and Renewable Energy EngineeringUniversity of New South WalesSydney 2033Australia

Kesterite Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)thin film solar cells have been regarded as one of the most promising thin film photovoltaic technologies,offering a low-cost and environmentally friendly solar energy *** remarkable advances have been achieved in kesterite solar cells,the performance gap relative to mature thin film photovoltaic technologies such as CIGSe and Cd Te remains *** open-circuit voltage(V_(OC))deficit has been recognized as the main limiting factor to performance improvement,with undesirable intrinsic defects being a key culprit contributing to the low V_(OC).To realize the promise inherent in kesterite CZTS to become an earth-abundant alternative to existing thin film photovoltaic technologies with comparable performance,significant research effort has been invested to tackle the challenging defect *** this review,recent progress and achievements relevant to engineering improvements to the defect properties of the semiconductor have been examined and *** strategies include:(i)manipulating the synthesis process to obtain a desirable reaction pathway and chemical environment;(ii)introducing cation substitution to increase the ionic size difference and supress the related band tailing deep-level defects;(iii)applying post deposition treatment(PDT)with alkaline elements to passivate the detrimental *** advances obtained from work on kesterite solar cells may lead to future high performance from this material and may be further extended to other earth-abundant chalcogenide photovoltaic technologies.

关键词： thin film solar cells kesterite solar cells Cu_(2)ZnSn(S,Se)_(4)(CZTSSe,CZTS) defect engineering

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Machine perfusion for liver transplantation:A concise review of clinical trials

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Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 387-391页

作者： Jun-Jun Jia Jian-Hui li hao Yu Yu Nie li Jiang hao-Yu li lin Zhou Shu-Sen Zheng Division of Hepatobiliary and Pancreatic Surgery First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Key Laboratory of Combined Multi-organ Transplantation Ministry of Public HealthHangzhou 310003China Collaborative Innovation Centers for Diagnosis Treatment of Infectious Diseases First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Background: With the increased use of extended-criteria donors, static cold storage has failed to provide optimal preservation of liver grafts, resulting in early allograft dysfunction and long-term complications Machine perfusion(MP) is a beneficial alternative preservation strategy for donor livers, particularly fo those considered to be of suboptimal quality, and could expand the limited donor pool. Data sources: A comprehensive search in Pub Med, EMBASE, Ovid databases and Clinical *** website was conducted using the medical subject heading terms "machine perfusion", "machine preservation""liver transplantation", combined with free text terms such as "hypothermic", "normothermic" and "sub normothermic". The deadline for the search was September 30, 2017. Results: MP can be classified as hypothermic, subnormothermic, and normothermic with the tempera ture maintained at 0–12 °C, 25–34 °C and 35–38 °C, respectively. Twelve clinical trials of MP have been reported in recent years. MP effectively decreased AST/ALT level and the incidence of early allograft dys function. However, the graft and patient survival rate after MP were similar to static cold storage. The detailed clinical characteristics such as liver function, graft survival, patient survival and early allograf dysfunction were ***: Clinical trial results showed that MP improves delayed graft function, primary non-function and biliary strictures. However, MP still requires validation in large clinical trials and the key parameters during MP still require optimization.

关键词： liver transplantation Machine perfusion Donation after circulatory death

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