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Effect of non-uniform swelling on coal multiphysics during gas injection: The triangle approach

Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1362-1372页

作者： Yifan Huang Jishan liu Yaoyao Zhao Derek Elsworth Yee-Kwong Leong Department of Chemical Engineering School of EngineeringThe University of Western Australia35 Stirling HighwayWA 6009Australia State Key Laboratory of Coal Resources & Safe Mining China University of Mining& TechnologyBeijing100803China Department of Energy and Mineral Engineering G3 Centre and Energy InstituteThe Pennsylvania State UniversityUniversity ParkPA16802USA

In current dual porosity/permeability models,there exists a fundamental assumption that the adsorption-induced swelling is distributed uniformly within the representative elementary volume (REV),irrespective of its internal structures and transient ***,both internal structures and transient processes can lead to the non-uniform *** this study,we hypothesize that the non-uniform swelling is responsible for why coal permeability in experimental measurements is not only controlled by the effective stress but also is affected by the adsorption-induced *** propose a concept of the swelling triangle composed of swelling paths to characterize the evolution of the non-uniform swelling and serve as a core link in coupled multiphysics.A swelling path is determined by a dimensionless volumetric ratio and a dimensionless swelling *** swelling paths have the same start and end point,and each swelling path represents a unique swelling *** swelling path as the diagonal of the triangle represents the case of the uniform swelling while that as the two perpendicular boundaries represents the case of the localized *** paths of all intermediate cases populate inside the *** corresponding relations between the swelling path and the response of coal multiphysics are established by a non-uniform swelling *** define this method as the triangle approach and corresponding models as swelling path-based *** proposed concept and models are verified against a long-term experimental measurement of permeability and strains under constant effective *** results demonstrate that during gas injection,coal multiphysics responses have a close dependence on the swelling path,and that in both future experiments and field predictions,this dependence must be considered.

关键词： Transient process Heterogeneity Swelling triangle Swelling path Non-uniform swelling coefficient

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Efficient piezo-assisted near-infrared-light-driven Cr(Ⅵ)reduction over Bi_(2)S_(3) nanowires transformed from ultrathin Bi_(2)WO_(6) nanosheets

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Rare Metals 2024年第9期43卷 4333-4343页

作者： Qiang Zhang Yuan-Hao Cheng Wei liu Hui-Nan Che Yan-Hui Ao Key Laboratory of Integrated Regulation and Resource Development On Shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNanjing 210098China

The utilization of piezo-photocatalytic technol ogy for environmental remediation under full spectrum solar light is promising but still ***,one dimensional Bi_(2)S_(3)nanowires,which can utilize both mechanical energy and near-infrared(NIR)light to remov hexavalent chromium(Cr(Ⅵ))efficiently,were synthe sized by a restrained growth *** reaction rat constants of Cr(Ⅵ)reduction in piezo-photocatalyti process under NIR(800–2500 nm)reached 0.334 min^(-1)which were 3.2 and 12.4 times as that of single piezo and photocatalytic *** formation of polarized electri fields and one-dimensional structure allow ultrafast sepa ration of charge carriers,thereby promoting the catalyti ***,due to the strong penetrability o NIR light,the piezo-photocatalysis performance in turbid solutions under NIR light(0.188 min^(-1))was even com parable to that under visible light(0.186 min^(-1)).Thi study provides a new concept on the development of piezo photocatalytic technology for environmental remediation by utilization of NIR light and natural mechanical energy.

关键词： Piezo-photocatalysis NIR light Bi_(2)S_(3)nanowires Cr(Ⅵ)

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Dietary supplementation with succinic acid improves growth performance and flesh quality of adult Nile tilapia(Oreochromis niloticus)fed a high-carbohydrate diet

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Animal Nutrition 2024年第3期18卷 390-407页

作者： Manxia Cao Ningning Xie Jianmin Zhang Ming Jiang Feng Huang Lixue dong Xing Lu Hua Wen Juan Tian Key Laboratory of Freshwater Biodiversity Conservation Ministry of AgricultureYangtze River Fisheries Research InstituteChinese Academy of Fishery SciencesWuhan 430223China Key Laboratory for Animal Nutrition and Feed Science of Hubei Province Wuhan Polytechnic UniversityWuhan 430023China

To evaluate the effects of dietary supplementation with succinic acid on growth performance,flesh quality,glucose,and lipid metabolism of Nile tilapia(Oreochromis niloticus)fed a high-carbohydrate diet(HCD),five iso-nitrogenous and iso-lipidic diets were prepared as follows:HCD(control group)consisting of 55%corn starch and HCD supplemented with 0.5%,1.0%,2.0%,and 4.0%succinic acid,*** with an initial body weight of 204.90±1.23 g randomly assigned to 15 tanks with 3 replicates per group and 10 fish per tank fed for 8 *** dietary succinic acid supplementation resulted in significant second-order polynomial relationship in the weight gain rate(WGR),specific growth rate(SGR),feed conversion ratio(FCR),protein efficiency rate(PER),viscerosomatic index,condition factor,and contents of muscular crude lipid and glycogen(P<0.05).The hepatosomatic index,mesenteric fat index,liver glycogen content and crude lipid contents of the whole-body and liver demonstrated significantly linear and second-order polynomial relationship(P<0.05).Quadratic curve model analysis based on WGR,SGR,PER,and FCR demonstrated that optimal supplementation with succinic acid in the HCD of Nile tilapia ranged from 1.83%to 2.43%.Fish fed with 1.0%succinic acid had higher muscular hardness,increased the contents of alkali-soluble hydroxyproline in collagen,docosahexaenoic acid(DHA)and n-3 polyunsaturated fatty acid(n-3PUFA)in muscle,and lower total fatty acid content in muscle(P<0.05)compared with the control *** to the control group,dietary supplementation with 1.0%succinic acid significantly increased the contents of total bounding amino acid(arginine,histidine,isoleucine,lysine,methionine,alanine,proline),total flavor amino acid(free aspartic acid),the catalase(CAT)activity and total antioxidant capacity,and the mRNA relative expression levels of CAT,superoxide dismutase(SOD),and nuclearfactor erythroidderived 2-like 2(Nrf2)in muscle(P<0.05).Furthermore,succini

关键词： Oreochromis niloticus High-carbohydrate diet Succinic acid Antioxidant capacity Muscular nutritional value Muscle growth

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Multivariate modular metabolic engineering and medium optimization for vitamin B_(12)production by Escherichia coli

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Synthetic and Systems Biotechnology 2024年第3期9卷 453-461页

作者： Feitao Chen Huan Fang Jianghua Zhao Pingtao Jiang Huina dong Ying Zhao Huiying Wang Tongcun Zhang Dawei Zhang College of Biotechnology Tianjin University of Science&TechnologyTianjin300457China Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin300308China University of Chinese Academy of Science Beijing100049China Key Laboratory of Engineering Biology for Low-Carbon Manufacturing Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin 300308China National Center of Technology Innovation for Synthetic Biology Tianjin300308China

Vitamin B_(12)is a complex compound synthesized by *** industrial production of vitamin B_(12)relies on specific microbial fermentation *** has been utilized as a host for the de novo biosynthesis of vitamin B_(12),incorporating approximately 30 heterologous ***,a metabolic imbalance in the intricate pathway significantly limits vitamin B_(12)*** this study,we employed multivariate modular metabolic engineering to enhance vitamin B_(12)production in *** by manipulating two modules comprising a total of 10 genes within the vitamin B_(12)biosynthetic *** two modules were integrated into the chromosome of a chassis cell,regulated by T7,J23119,and J23106 promoters to achieve combinatorial pathway *** highest vitamin B_(12)titer was attained by engineering the two modules controlled by J23119 and T7 *** inclusion of yeast powder to the fermentation medium increased the vitamin B_(12)titer to 1.52 mg/*** enhancement was attributed to the effect of yeast powder on elevating the oxygen transfer rate and augmenting the strain’s isopropyl-β-D-1-thiogalactopyranoside(IPTG)***,vitamin B_(12)titer of 2.89 mg/L was achieved through scaled-up fermentation in a 5-liter *** strategies reported herein will expedite the development of industry-scale vitamin B_(12)production utilizing ***.

关键词： Vitamin B_(12) Multivariate modular metabolic engineering E.coli Organic nitrogen sources Fed-batch fermentation

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Business Principles in Stories

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China Book International 2024年第5期 118-119页

作者： Yang dong Yajie Chamber of Commerce Tsinghua Entrepreneurs Association(TEEC)

In the far ***'er Village,Citrus Village,and Peach Blossom Island are home to many cute little villagers,and as the villagers set up businesses and seek development,the villages are faced with new problems and developments every *** book uses ten major industries in daily life:catering,retail,manufacturing,FMCG,service,agriculture,logistics,finance,media,and public facilities management to show the business logic,development contradictions,and the way of thinking and values that entrepreneurs should have.

关键词： finance contradiction Island

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Understanding the initial use stage of cement mortar lining in drinking water distribution systems:Silicon and aluminum as stability indicators

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Journal of Environmental Sciences 2024年第1期135卷 495-505页

作者： Qiaozhi liu Yuan Zhuang Guiwei Li Yao Zhang Marc A.Edwards Baoyou Shi Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Civil and Environmental Engineering Virginia TechBlacksburgVA 24061USA

The cement mortar lining(CML)of commonly used ductile iron pipes can severely deteriorate the drinking water quality at the initial stage of use,but the behavioral characteristics of different elements release from the CML in this stage is still *** this study,dynamic immersion experiments with new cement mortar lined ductile iron pipe reactors were conducted under different feed water hardness and alkalinity *** results showed that the release of alkaline substances from the CML at the initial stage of use could strongly influence the pH of water,which consequently greatly impacted the release/precipitation behaviors of calcium,aluminum and *** pH and aluminum concentration of the effluent water could reach 11.5 and 700μg/L within 24 hr of hydraulic retention time,respectively,under conditions of relatively lower hardness and *** to the pH elevation,calcium carbonate precipitation could occur even at much lower feed water *** the aluminum and silicon could keep release from the CML in soluble form at different hardness and alkalinity levels,and their release rate depended on the amount of calcium carbonate ***,aluminum and silicon were more suitable as indicators of the corrosion intensity at the initial stage of CML use rather than the traditional calcium carbonate precipitation *** feed water hardness and alkalinity levels for mitigating the initial intense corrosion of CML were proposed:hardness>40 mg/L(CaCO_(3)),alkalinity>100 mg/L(CaCO_(3)).

关键词： Cement mortar lining Hardness Alkalinity Elemental release Drinking water supply

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Constructing oxygen deficiency-rich V_(2)O_(3)@PEDOT cathode for high-performance aqueous zinc-ion batteries

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Rare Metals 2024年第2期43卷 635-646页

作者： dong-Fei Sun Zi-Juan Wang Tian Tian Xin Yu Dan-Dan Yu Xiao-Zhong Zhou Guo-Fu Ma Zi-Qiang Lei Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education Key Laboratory of Eco-environmental Polymer Materials of Gansu ProvinceSchool of College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou730070China

Aqueous zinc-ion batteries(AZIBs)have attracted widespread attention due to the advantages of high safety and environmental *** V_(2)O_(3) is a promising cathode,the strong electrostatic interaction between Zn^(2+) and V_(2)O_(3) crystal,and the sluggish reaction kinetics still limit their application in ***,the oxygen defects rich V_(2)O_(3) with conducive poly(3,4-ethylenedioxythiophene)(PEDOT)shell(V_(2)O_(3)-Od@PEDOT)was fabricated for AZIBs by combining the sulfur-assisted thermal reduction and in-situ polymerization *** introduced oxygen vacancies of V_(2)O_(3)–Od@PEDOT weaken the electrostatic interaction between Zn^(2+) and the host material,improving the interfacial electron transport,while the PEDOT coating enhances the structural stability and conductivity of V_(2)O_(3),thus accelerating the reaction *** on the advantages,V_(2)O_(3)–Od@PEDOT electrode delivers a reversible capacity of 495 mAh·g^(−1) at 0.1 A·g^(−1),good rate capability(189 mAh·g^(−1)at 8.0 A·g^(−1)),and an impressive cycling stability with 90.1%capacity retention over 1000 cycles at 8.0 A·g^(−1).The strategy may provide a path for exploiting the other materials for high performance AZIBs.

关键词： Oxygen defects V_(2)O_(3) PEDOT Electrochemical self-optimization Aqueous zinc-ion batteries

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A unified Minorization-Maximization approach for estimation of general mixture models

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 343-362页

作者： HUANG Xi-fen liu Deng-ge ZHOU Yun-peng ZHU Fei School of Mathematics Yunnan Normal UniversityKunming 650092China Department of Statistics and Actuarial Science The University of Hong KongHong KongChina

The mixed distribution model is often used to extract information from heteroge-neous data and perform modeling *** the density function of mixed distribution is complicated or the variable dimension is high,it usually brings challenges to the parameter es-timation of the mixed distribution *** application of MM algorithm can avoid complex expectation calculations,and can also solve the problem of high-dimensional optimization by decomposing the objective *** this paper,MM algorithm is applied to the parameter estimation problem of mixed distribution *** method of assembly and decomposition is used to construct the substitute function with separable parameters,which avoids the problems of complex expectation calculations and the inversion of high-dimensional matrices.

关键词： MM algorithm mixed distribution model parameter estimation assembly decomposition tech-nology parameter separation

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吲哚菁绿荧光成像技术在胆道疾病中的应用

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中华消化外科杂志 2024年第1期23卷 80-84页

作者：刘付宝蒋东耿小平安徽医科大学第一附属医院普通外科合肥230022

近年来,吲哚菁绿荧光成像技术在胆道疾病的诊断和治疗中得到了广泛应用。吲哚菁绿对胆道系统的荧光显影可准确定位病变组织,精确识别胆道结构,有效避免对正常胆道结构的损伤,极大提高了胆道外科手术的精确性及安全性,具有重要临床意义... 详细信息

近年来,吲哚菁绿荧光成像技术在胆道疾病的诊断和治疗中得到了广泛应用。吲哚菁绿对胆道系统的荧光显影可准确定位病变组织,精确识别胆道结构,有效避免对正常胆道结构的损伤,极大提高了胆道外科手术的精确性及安全性,具有重要临床意义。然而,目前该技术在胆道外科领域的应用尚处在探索阶段,表现出巨大应用潜力的同时亦暴露出诸多问题及争议。相信随着技术的不断发展和完善,未来该技术将在胆道疾病的诊断与治疗中发挥更大作用,使患者更多获益。

关键词：胆道疾病吲哚菁绿胆道显影应用现状进展

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Electronic regulation to achieve efficient anaerobic digestion of organic fraction of municipal solid waste(OFMSW):strategies,challenges and potential solutions

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Frontiers of Environmental Science & Engineering 2024年第4期18卷 159-165页

作者： Yongdong Chen Hong Wang Parisa Ghofrani-Isfahani Li Gu Xiaoguang liu Xiaohu Dai State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Tongji UniversityShanghai 200092China Department of Chemical and Biochemical Engineering Technical University of DenmarkKgs Lyngby DK-2800Denmark College of Environment and Ecology Chongqing UniversityChongqing 400045China

Anaerobic digestion(AD)of organic fraction of municipal solid waste(OFMSW)is prone to system breakdown under high organic loading rates(OLRs)condition,which subsequently reduces the efficiency of digestion process and results in substantial economic *** this perspective paper,the substances metabolisms,electrons flow,as well as microbial interaction mechanisms within AD process are comprehensively discussed,and the underlying bottleneck that causes inefficient methane production is identified,which is“electrons surplus”.Systems encountering severe electron surplus are at risk of process failure,making it crucial to proactively prevent this phenomenon through appropriate *** this basis,the present perspective proposes three potential electronic regulation strategies to prevent electrons surplus,namely,electron shunt,accelerating electron transfer and regulating methanogenic metabolism pathway,and presents specific methodologies for each ***,the potential solutions to challenges that may occur during the electronic regulation process are also presented in this *** perspective aims to provide innovative approaches to achieve the efficient and stable operation of OFMSW anaerobic digestion,especially under high OLRs condition.

关键词： Anaerobic digestion Electrons surplus Electronic regulation Electrons shunt Electron transfer Methanogenic metabolism pathway

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