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Solid-state corrosion of lithium for prelithiation of SiO_(x)-C composite anode with carbon-incorporated lithium phosphorus oxynitride

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Nano Research 2023年第6期16卷 8394-8404页

作者： Yan Qiao siyu yang Ziqiang Ma yangyuchen yang Xiang Hong Zhengwen Fu Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Department of ChemistryFudan UniversityShanghai 200433China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China Central Research Institute Huawei Technologies Co.Ltd.Shenzhen 518129China

In order to address the issues of low initial Coulombic efficiency of SiO_(x)-C composite anode due to the formation of solid electrolyte interphase,irreversible conversion reaction,and large volume change,the prelithiation method using metal lithium has been employed as one of effective ***,violent side reactions with liquid electrolyte for prelithiation lead to low prelithiation efficiency and induce poor interface between the SiO_(x)-C electrode and liquid ***,a new prelithiation method with so called solid-state corrosion of lithium is *** replacing liquid electrolyte with solid-state electrolyte of carbon-incorporated lithium phosphorus oxynitride(LiCPON),not only various side reactions associated with metal lithium are avoided,but also the perfect interface is achieved from the decomposition products of *** successful implementation of solid-state corrosion prelithiation can be confirmed by changes in optical image,scanning electron microscopy,and X-ray *** with pristine electrode,the initial Coulombic efficiency of the prelithiated electrode using solid electrolyte can be increased by about 10%,reaching 98.6%in half cell and 88.9%in full *** with prelithiated electrode using liquid electrolyte,the prelithiation efficiency of the prelithiated anode with solid-state corrosion can be increased from 25.7%to 82.8%.Solid-state corrosion of lithium is expected to become a useful method for prelithiation of SiO_(x)-C composite electrode with high initial Coulombic efficiency and large prelithiation efficiency.

关键词： carbon-incorporated lithium phosphorus oxynitride SiO_(x)-C composite anode prelithiation efficiency interface

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Anti-cracking Property of EVA-modified Polypropylene Fiber-reinforced Concrete Under Thermal-cooling Cycling Curing

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Journal of Wuhan University of Technology(Materials Science) 2019年第5期34卷 1109-1118页

作者： LIU Sifeng[[ yang siyu KONG Yaning WAN Tingting ZHAO Guorong School of Materials Science and Engineering Tongji UniversityShanghai 201804China Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education Tongji UniversityShanghai 200092China Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji UniversityShanghai 200092China

In order to investigate the synergistic effect of re-dispersible powder-ethylene-vinyl acetate copolymer(EVA) and polypropylene fiber on the crack resistance of concrete under thermal fatigue loading, the compressive strength, ultimate tensile strength, ultimate tensile strain and tensile modulus of elasticity were tested. In addition, ultrasonic method and scanning electron microscope analysis were used to explain the microstructure mechanism. The results show that polypropylene fiberreinforced concrete presents a better performance on crack resistance than ordinary concrete, and the synergism of EVA and polypropylene fiber can improve the anti-cracking ability of concrete further.

关键词： anti-cracking property EVA-modified polypropylene fiber-reinforced concrete thermal-cooling cycling curing

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Structural and functional analyses of microcystinase A:optimized heterologous expression,stability,and degradability

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Journal of Oceanology and Limnology 2024年第6期42卷 1805-1816页

作者： siyu yang Jun ZUO Licheng HUANG Jin LIU Nanqin GAN Institute of Hydrobiology Chinese Academy of SciencesWuhan 430072China National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources ProtectionInstitute for Eco-Environmental Research of Sanyang WetlandWenzhou UniversityWenzhou 325035China University of Chinese Academy of Sciences Beijing 100190China Kunming Dianchi and Plateau Lakes Institute Kunming 650228China

Microcystinase(MlrA)is a key endopeptidase that catalyzes microcystin degradation without generating harmful ***,the application of MlrA in the field is primarily impeded by its limited productivity and short ***,the MlrA's function was studied by modelling its structure,which subsequently increased its heterologous expression and high-temperature *** demonstrate that after the irregular sequence at the C-terminus of MlrA was removed,enzyme solubility was significantly *** addition,three fusion tags,namely maltose-binding protein,glutathione S-transferase(GST),and N-utilization substance A(NusA)were used to enhance the overexpression of soluble recombinant MlrA,among which NusA-MlrA exhibited the highest ***,NusA-MlrA was active in pH 4-10 at 20-80℃;even at 80℃,approximately 35.8%of fusion protein remained ***-MlrA retained 89%of MlrA's activity even after 7 d of storage at 50℃;and on day 7,the protein retained>90%of its activity at pH ***,a stable,soluble,and long-lasting heterologous MlrA was successfully constructed that could eliminate microcystins in Escherichia coli C43(DE3).This study enriched the comprehension of MlrA's structure and enzymatic properties,by particularly addressing the endopeptidase's low expression and short lifespan,which improved its suitability for future applications.

关键词： microcystinase(MlrA) biodegradation microcystin AlphaFold2 N-utilization substance A(NusA)-MlrA

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DNEF:A New Ensemble Framework Based on Deep Network Structure

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Computers, Materials & Continua 2023年第12期77卷 4055-4072页

作者： siyu yang Ge Song Yuqiao Deng Changyu Liu Zhuoyu Ou College of Mathematics and Informatics South China Agricultural UniversityGuangzhou510642China School of Statistics and Mathematics Guangdong University of Finance and EconomicsGuangzhou510120China

Deep neural networks have achieved tremendous success in various fields,and the structure of these networks is a key factor in their *** this paper,we focus on the research of ensemble learning based on deep network structure and propose a new deep network ensemble framework(DNEF).Unlike other ensemble learning models,DNEF is an ensemble learning architecture of network structures,with serial iteration between the hidden layers,while base classifiers are trained in parallel within these hidden ***,DNEF uses randomly sampled data as input and implements serial iteration based on the weighting strategy between hidden *** the hidden layers,each node represents a base classifier,and multiple nodes generate training data for the next hidden layer according to the transfer *** DNEF operates based on two strategies:(1)The weighting strategy calculates the training instance weights of the nodes according to their weaknesses in the previous layer.(2)The transfer strategy adaptively selects each node’s instances with weights as transfer instances and transfer weights,which are combined with the training data of nodes as input for the next hidden *** two strategies improve the accuracy and generalization of *** research integrates the ensemble of all nodes as the final output of *** experimental results reveal that the DNEF framework surpasses the traditional ensemble models and functions with high accuracy and innovative deep ensemble methods.

关键词： Machine learning ensemble learning deep ensemble deep network structure classification

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Influence of the Electrode Distance on Microstructure and Corrosion Resistance of Ni-Cr Alloyed Layers Deposited by Double Glow Plasma Surface Metallurgy

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Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1204-1215页

作者： HUANG Jun yang siyu CUI Shiyu XU Jilin ZHANG Jianping LUO Junming School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China

Ni-Cr alloyed layers were synthesized on the surface of Q235 mild steel by double-glow plasma surface metallurgy with different electrode *** microstructure and phases of the alloyed layer were characterized by scanning electron microscopy(SEM),energy dispersive X-ray spectrometry(EDS),and X-ray diffraction(XRD).The corrosion behavior of the Ni-Cr alloyed layers both in 3.5%NaCl and 0.5 M H_(2)SO_(4) solution were systematically investigated by open-circuit potential(OCP),potentiodynamic polarization and electrochemical impedance spectroscopy(EIS).The obtained results reveal that the Ni-Cr alloyed layer consists of a deposited layer and an inter-diffusion *** increasing the electrode distance,the relative thickness,microstructure and phase composition of the Ni-Cr alloyed layers vary *** data show the Ni-Cr alloyed layer with the electrode distance of 15 mm has highest corrosion resistance and lowest corrosion rate,while EIS results reveal the same *** highest protective efficiency in 3.5%NaCl and 0.5 M H_(2)SO_(4) solution are 99.23%and 99.92%,respectively,obtained for the Ni-Cr alloyed layer with 15 mm electrode *** the electrode distance is too large,a thin and porosity Ni-Cr alloyed layer,caused by low plasma density and Kirkendall effect,will be obtained,and will decrease the protective efficiency in corrosive medium.

关键词： double glow plasma surface metallurgy Ni-Cr alloyed layer electrode distance corrosion behavior electrochemical impedance spectroscopy

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近30年宁夏土地利用碳排放风险及影响因素

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国土与自然资源研究 2025年第1期 38-43页

作者：杨思雨贾科利李浩宇宁夏大学地理科学与规划学院宁夏银川750021

本文采用碳排放系数法和LMDI模型分解法,利用1990-2020年宁夏22个县区土地利用和能源消耗数据,分析了土地利用变化与碳排放风险及影响因素。结果表明,(1)1990-2020年宁夏建设用地、林地和水体面积显著增加,以建设用地面积增加最为突出,3... 详细信息

本文采用碳排放系数法和LMDI模型分解法,利用1990-2020年宁夏22个县区土地利用和能源消耗数据,分析了土地利用变化与碳排放风险及影响因素。结果表明,(1)1990-2020年宁夏建设用地、林地和水体面积显著增加,以建设用地面积增加最为突出,30年面积增加了15.77×10^(4)hm^(2);耕地和未利用土地面积先增加后减小、草地和面积不断减小,土地利用开发强度增大。(2)宁夏碳排放量呈显著增加趋势,净碳排放增加了4 669.25×10^(4)t,增幅448.69%。(3)宁夏土地利用碳排放风险逐步升高,空间上形成了沿黄县区碳排放风险高于中、南部县区的分布格局。(4)土地利用结构、土地碳排放强度、人均GDP和人口对碳排放的贡献率较大,促进了碳排放量的增加,而单位GDP用地强度对碳排放的贡献率最小,对碳排放起抑制作用。

关键词：土地利用碳排放风险 LMDI模型宁夏

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Modeling and analysis of oil shale refinery process with the indirectly heated moving bed

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Carbon Resources Conversion 2018年第3期1卷 260-265页

作者： Huairong Zhou Shuai Zeng siyu yang Guangwen Xu Yu Qian School of Chemical Engineering South China University of TechnologyGuangzhou 510640PR China Shenyang University of Chemical Technology Shenyang 110142PR China

China is rich of oil shale as one of alternative fossil energy *** exploitation and utilization of oil shale are strategically important in alleviating the shortage of oil and gas resources in ***,low utilization rate of raw material,low oil yield,and high content of heavy components in the oil are the main problems in current Fushun type oil shale refinery *** indirectly heated moving bed is developed to de-bottleneck Fushun type *** oil shale refinery process with the indirectly heated moving bed is modeled and simulated in this *** on the simulation,a techno-economic analysis is performed and compared with the conventional Fushun oil shale refinery *** show that:for a shale refinery of 3.0 Mt/y scale,375 t/h oil shale retorting requires 149.6 MW of heat,in which 60%of the heat is produced by combustion of the oil shale pyrolysis gas,while remaining 40%from the coal gasified *** consideration of investment and operation,the cost of product shale oil of the new process is 2636 CNY/t,which is 12%lower than that of the conventional Fushun refinery *** benefit comes from higher utilization of raw material and oil yield of the new *** competitive crude oil price of the indirectly heated moving bed refinery process is about 51$/bbl,while that of the Fushun refinery process is 58$/*** 2017 year,the crude oil price fluctuates at around 50$/bbl,thus the new indirectly heated moving bed refinery process shows better economic competitiveness.

关键词： Indirectly heated moving bed Shale refinery Modeling Analysis

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CRISPR-based genetic screens advance cancer immunology

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Science China Life Sciences 2024年第12期67卷 2554-2562页

作者： Yuanfang Cao Xueting Li Yumu Pan Huahe Wang siyu yang Lingjuan Hong Lupeng Ye Institute of Modern Biology Nanjing University

CRISPR technologies have revolutionized research areas ranging from fundamental science to translational medicine. CRISPR-based genetic screens offer a powerful platform for unbiased screening in various fields, such as cancer immunology. Immune checkpoint blockade(ICB)therapy has been shown to strongly affect cancer treatment. However, the currently available ICBs are limited and do not work in all cancer patients. Pooled CRISPR screens enable the identification of previously unknown immune regulators that can regulate T-cell activation,cytotoxicity, persistence, infiltration into tumors, cytokine secretion, memory formation, T-cell metabolism, and CD4+T-cell *** novel targets can be developed as new immunotherapies or used with the current ICBs as new combination therapies that may yield synergistic efficacy. Here, we review the progress made in the development of CRISPR technologies, particularly technological advances in CRISPR screens and their application in novel target identification for immunotherapy.

关键词： gene editing CRISPR/Cas genetic screening cancer immunotherapy immune cells

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Optimization of capacity configuration and comprehensive evaluation of a renewable energy electrolysis of water for hydrogen production system

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Chinese Journal of Chemical Engineering 2024年第12期76卷 301-317页

作者： Huairong Zhou Xin Wu Chunlei Li siyu yang Zhichen Chen Jun Lu Chen Fang School of Petrochemical Engineering Lanzhou University of TechnologyLanzhou 730050China School of Chemical Engineering South China University of TechnologyGuangzhou 510640China PetroChina Yumen Oilfield Company Yumen 735200China

The global green hydrogen industry is experiencing rapid growth,but the high production costs are hindering its widespread *** address this challenge,it is particularly important to rationally configure a renewable energy hydrogen production *** this purpose,the study proposes a model for capacity optimization configuration of a renewable energy hydrogen production system,which integrates wind power,photovoltaic(PV)power,and concentrating solar power(CSP)with alkaline *** conducts capacity optimization configuration and comprehensive evaluations of the hydrogen production system across various *** minimize the total daily consumption cost,the CPLEX solver is utilized to solve the objective function and determine the capacity configuration of the renewable energy electrolysis of water hydrogen production system generator set under various *** approach achieves a utilization rate of over 99%for renewable *** comprehensive evaluation,research has found that renewable energy-coupled hydrogen production significantly reduces generator capacity and electricity generation costs compared to separate hydrogen production,enhancing the economic efficiency of the *** Wind-PV-CSP coupling hydrogen production system has the smallest generator assembly capacity and the lowest hydrogen production cost,which is 18.84 CNY·kg^(-1),significantly lower than the cost of PV-CSP coupling hydrogen production(25.78 CNY·kg^(-1))and wind-PV coupling hydrogen production(25.86 CNY·kg^(-1)).It has good development prospects and plays an important role in exploring the development path of large-scale on-site consumption of new energy.

关键词： Renewable energy Green hydrogen production Multi-energy coupling Capacity optimization System optimization

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A close look at the competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei

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Chinese Physics C 2019年第7期43卷 70-78页

作者： Feng Pan Dan Zhou siyu yang Yingwen He Department of Physics Liaoning Normal UniversityDalian 116029China Department of Physics and Astronomy Louisiana State UniversityBaton RougeLA 70803-4001USA

The competition of isovector and isoscalar pairing in A=18 and 20 even-even N≈Z nuclei is analyzed in the framework of the mean-field plus the dynamic quadurpole-quadurpole, pairing and particle-hole interactions, whose Hamiltonian is diagonalized in the basis U(24) ?(U(6) ? S U(3) ? S O(3))■(U(4) ? S US(2)■ S UT(2)) in the L = 0 configuration subspace. Besides the pairing interaction, it is observed that the quadurpole-quadurpole and particlehole interactions also play a significant role in determining the relative positions of low-lying excited 0^+ and 1^+ levels and their energy gaps, which can result in the ground state first-order quantum phase transition from J = 0 to J = *** strengths of the isovector and isoscalar pairing interactions in these even-even nuclei are estimated with respect to the energy gap and the total contribution to the binding energy. Most importantly, it is shown that although the mechanism of the particle-hole contribution to the binding energy is different, it is indirectly related to the Wigner term in the binding energy.

关键词： isovector and isoscalar pairing interaction particle-hole interaction light mass N≈Z nuclei

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