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Microstructure Analysis of TC4/Al 6063/Al 7075 Explosive Welded Composite Plate via Multi-scale Simulation and Experiment

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稀有金属材料与工程 2025年第1期54卷 27-38页

作者： zhou Jianan Luo Ning Liang Hanliang Chen Jinhua Liu Zhibing zhou xiaohong National Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China China Coal Technology Engineering Group Huaibei Blasting Technology Research Institute Limited Company Huaibei 235000China

Because of the challenge of compounding lightweight,high-strength Ti/Al alloys due to their considerable disparity in properties,Al 6063 as intermediate layer was proposed to fabricate TC4/Al 6063/Al 7075 three-layer composite plate by explosive *** microscopic properties of each bonding interface were elucidated through field emission scanning electron microscope and electron backscattered diffraction(EBSD).A methodology combining finite element method-smoothed particle hydrodynamics(FEM-SPH)and molecular dynamics(MD)was proposed for the analysis of the forming and evolution characteristics of explosive welding interfaces at *** results demonstrate that the bonding interface morphologies of TC4/Al 6063 and Al 6063/Al 7075 exhibit a flat and wavy configuration,without discernible defects or *** phenomenon of grain refinement is observed in the vicinity of the two bonding ***,the degree of plastic deformation of TC4 and Al 7075 is more pronounced than that of Al 6063 in the intermediate *** interface morphology characteristics obtained by FEM-SPH simulation exhibit a high degree of similarity to the experimental *** simulations reveal that the diffusion of interfacial elements predominantly occurs during the unloading phase,and the simulated thickness of interfacial diffusion aligns well with experimental *** introduction of intermediate layer in the explosive welding process can effectively produce high-quality titanium/aluminum alloy composite ***,this approach offers a multi-scale simulation strategy for the study of explosive welding bonding interfaces.

关键词： TC4/Al 6063/Al 7075 composite plate explosive welding microstructure analysis multi-scale simulation

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学术期刊对社会科学学科发展的意义——以社会学学科为例

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浙江社会科学 2025年第1期 11-27,155,156页

作者：周晓虹南京大学学术委员会南京210023

学术期刊和图书是自然科学和人文社会科学发布和传播科学发现或学术见解的两种主要途径。同人文学科相比,除了社会科学更依赖学术期刊发布自己的知识成果外,期刊对学科发展还具有一系列鲜明的意义:它表征了一学科的存在理由,也体现了学... 详细信息

学术期刊和图书是自然科学和人文社会科学发布和传播科学发现或学术见解的两种主要途径。同人文学科相比,除了社会科学更依赖学术期刊发布自己的知识成果外,期刊对学科发展还具有一系列鲜明的意义:它表征了一学科的存在理由,也体现了学科内部的分歧;它展示了某一学科内部的学术精进过程,不仅学者常常借用工作论文到期刊论文再到学术专著的形式提升自己的话语复杂性,而且在较长时段上也能体现出学术精进的发展轨迹;它孵化了科学家共同体或学术共同体,一方面共同体的形成会表现出地域性特征,另一方面不同的亚学术共同体也会相互影响;它培育了民族精神和自主知识体系的建构,社会学学科有关“社会学中国化”的百年讨论历程就是最好的例证。最后,文章以社会学学科为例,讨论了学术期刊如何通过关注总体性引领学术发展,以及网络化时代传统学术期刊所遭遇的机遇与挑战。

关键词：社会科学学术期刊学科表征学术精进学术共同体话语体系

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社会科学主体性的理论建构——中国式现代化的精神叙事

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浙江学刊 2025年第1期 24-34+239页

作者：周晓虹彭圣钦南京大学南京大学社会学院

对中国社会科学主体性的呼唤意味着将作为研究客体的中国转化为研究主体，是破除西方社会科学知识霸权和发展中国特色哲学社会科学的必由之路。本文从基本动因和理论资源的角度，梳理并整合了既有的主体性论述，将其概括为历史主体性和... 详细信息

对中国社会科学主体性的呼唤意味着将作为研究客体的中国转化为研究主体，是破除西方社会科学知识霸权和发展中国特色哲学社会科学的必由之路。本文从基本动因和理论资源的角度，梳理并整合了既有的主体性论述，将其概括为历史主体性和文化主体性两种策略。前者不满于诸如传统/现代二分法等西方理论框架对纷繁复杂的中国历史和现实经验的切割，后者则不满于西方理论背后的文化预设对中国社会和文化传统的曲解。在此基础上，本文试图超越二者，提出另一种以中华文明为基础、以提供中国式现代化的理论叙事为目标的文明主体性策略。

关键词：社会科学主体性历史主体性文化主体性文明主体性

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Nutrient concentration variations during Oenanthe javanica growth and decay in the ecological floating bed system

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Journal of Environmental Sciences 2010年第11期22卷 1710-1717页

作者： xiaohong zhou Guoxiang Wang School of the Environment Jiangsu University Zhenjiang 212013 China. Jiangsu Key Laboratory of Environmental Change and Ecological Construction College of Geographical Science Nanjing Normal University Nanjing 210046 China

The ecological floating bed system is a natural alternative to technical methods of wastewater treatment and involves complex processes induced by plants or microorganisms in the wastewater. This study aimed to identify nutrient concentration variations during Oenanthe javanica （Blume） DC growth and decay in the ecological floating bed system. Results showed that the third-order polynomial equation was suitable to describe pollutant concentration changes, showing that the effect of O. javanica ecological floating bed system on polluted water could be divided into the purification phase and decay phase. During the purification phase, nutrient concentrations rapidly decreased because O. javanica influenced water microbial communities and water physical parameters （i.e., dissolved oxygen, pH, and temperature）, and had a direct uptake of nutrients. However, during the decay phase, nitrogen and phosphorus concentrations in the plant tissues decreased, and these lost nutrients ultimately transferred to water and led to water quality deterioration. Results also showed that the uptake and storage of O. javanica in nutrients were temporary and the plant served only as media of the nutrients removed from the water. Under these circumstances, harvesting was an appropriate intervention to improve the treatment efficiency of O. javanica ecological floating bed system.

关键词： Oenanthe javanica ecological floating bed purification decay polluted water

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Inhibitory effect of nitrobenzene on oxygen demand in lake sediments

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Journal of Environmental Sciences 2012年第5期24卷 934-939页

作者： xiaohong zhou Xuying Wang Hanchang Shi School of Environment Tsinghua University Beijing 100084 China

Nitrobenzene is an important raw material and product, which presents a heavy threat to the ecosystem. The potential impacts of nitrobenzene on sediment oxygen demand （SOD） were studied in lake sediment simulating reactors receiving relatively low inputs of nitrobenzene. Oxygen microprofiles were measured in these sediment reactors using microelectrodes. After an initial microprofile measurement as a control, nitrobenzene was added to the overlying water resulting in concentrations of 0, 50, 100, and 150 μg/L. Microprofiles were measured on day 1, 2, 4 and 7 following the addition of nitrobenzene. SODs were determined from the microprofiles using a reaction-diffusion model. Results showed that the SODs increased relative to the initial values measured in the pre-treatment period in reactors exposed to all nitrobenzene concentrations on day 1. However, the values decreased gradually on the following days, which eventually resulted in a 50% loss in SODs after 7 days of exposure to nitrobenzene in all reactors. In addition, the inhibition effect of nitrobenzene on SOD exhibited a weak relationship with its concentration. The microscopic observation and count of algae in the sediment showed that the exposure to nitrobenzene did not change the composition of algae greatly, however, it decreased the number of dominant algae species sharply after 7 days of exposure. These results suggested that nitrobenzene could significantly alter SOD in lakes, which could ultimately affect the pollutant recovery in aquatic-sediment systems.

关键词： nitrobenzene sediment inhibitory effect microelectrode sediment oxygen demand

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A potentiometric cobalt-based phosphate sensor based on screen-printing technology

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Frontiers of Environmental Science & Engineering 2014年第6期8卷 945-951页

作者： Lei ZHU xiaohong zhou Hanchang SHI School of Environment Tsinghua University Beijing 100084 China Division of Ecology and Environment Yangtze Delta Region Institute of Tsinghua University Jiaxing 314006 China

A potentiometric cobalt-based screen-pritning sensor was fabricated by electroplating cobalt on the surface of a screen-printing electrode as the sensitive layer for the determination of dihydrogenphosphate （H2PO4） in wastewater samples. The electrochemical performance of this sensor was fully examined to determine its detection calibration, detection limit, response time, selectivity, and interference with pH, various ions, and dissolved oxygen （DO）. The cobalt-based phosphate sensor showed a phosphate-selective potential response in the range of 10 5mol·L^-1 to 10^-1 mol^-1, yielding a detection limit of 3.16 × 10μmol·L^l and a slope of -37.51 mV·decade＇ in an acidic solution （pH 4.0） of H2PO4-. DO and pH were found to interfere with sensor responses to phosphate. Ultimately, the performance of the sensor was validated for detecting wastewater samples from the Xiaojiahe Waste- water Treatment Plant against the standard speetrophotometric methods for HzPO4 analysis. The discrepancy between the two methods was generally ＋5% （relative standard deviation）. Aside from its high selectivity, sensitivity, and stability, which are comparable with conventional bulk Co-wire sensors, the proposed phosphate sensor presents many other advantages, such as low price, compactness, ease of use, and the possibility of integration with other analytical devices, such as flow injectors.

关键词： phosphate cobalt screen-printing technology electroplate wastewater

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Evaluation of oxygen transfer parameters of fine-bubble aeration system in plug flow aeration tank of wastewater treatment plant

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Journal of Environmental Sciences 2013年第2期25卷 295-301页

作者： xiaohong zhou Yuanyuan Wu Hanchang Shi Yanqing Song State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua University

Knowledge of the oxygen mass transfer of aerators under operational conditions in a full-scale wastewater treatment plant （WWTP） is meaningful for the optimization of WWTP, however, scarce to best of our knowledge. Through analyzing a plug flow aeration tank in the Lucun WWTP, in Wuxi, China, the oxygenation capacity of fine-bubble aerators under process conditions have been measured in- situ using the off-gas method and the non-steady-state method. The off-gas method demonstrated that the aerators in different corridors in the aeration tank of WWTP had significantly different oxygen transfer performance; furthermore, the aerators in the same corridor shared almost equal oxygen transfer performance over the course of a day. Results measured by the two methods showed that the oxygen transfer performance of fine-bubble aerators in the aeration tank decreased dramatically compared with that in the clean water. The loss of oxygen transfer coefficient was over 50% under low-aeration conditions （aeration amount 〈 0.67 Nm 3 /hr）. However, as the aeration amount reached 0.96 Nm 3 /hr, the discrepancy of oxygen transfer between the process condition and clean water was negligible. The analysis also indicated that the non-steady-state and off-gas methods resulted in comparable estimates of oxygen transfer parameters for the aerators under process conditions.

关键词： fine-bubble aerator off-gas method non-steady-state method oxygen transfer parameters

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Enhanced production of cytidine 5'-monophosphate using biocatalysis of di-enzymes immobilized on amino-functionalized sepharose

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Chinese Journal of Chemical Engineering 2023年第6期58卷 40-52页

作者： xiaohong zhou Wenfeng zhou Wei Zhuang Chenjie Zhu Hanjie Ying Hongman Zhang School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Materials-Oriented Chemical Engineering College of Biotechnology and Pharmaceutical EngineeringNational Engineering Technique Research Center for BiotechnologyNanjing Tech UniversityNanjing 211816China

Cytidine 5'-monophosphate(5'-CMP)is an essential nucleotide for *** this study,enhanced production of 5'-CMP was realized by the transformation of cytidine using co-immobilized di-enzymes,uridine-cytidine kinase(UCK)and acetate kinase(AcK).The immobilization yield of the enzyme had a clear correlation with the surface charges as zeta potential(ξ).Among them,ε-polylysinefunctionalized sepharose(SA-EPL,ξ=9.31 m V)showed high immobilization yield(78.8%),which was4.9-fold than that of nitrilotriacetic acid functionalized sepharose(SA-NTA,ξ=-12.6 m V).The residual activity of affinity co-immobilized enzyme(EPL-Ni/EPL@Ac K-UCK)was higher than 70.6%after recycled 10 ***,this study provides an effective approach for the production of 5'-CMP with the advantages of low adenosine 5'-triphosphate(ATP)consumption,reduced side reactions,and improved reusability by co-immobilized UCK and Ac K on the functionalized Sepharose.

关键词： Sepharose ε-Polylysine Dual-enzyme cascade Cytidine 5'-monophosphate Enzyme immobilization

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Magnetic resonance imaging in personalized medicine

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Science China(Life Sciences) 2017年第1期60卷 1-4页

作者： Xiaoying Wang xiaohong Joe zhou Radiology Department Peking University First Hospital Center for Magnetic Resonance Research and Departments of Radiology Neurosurgery and BioengineeringUniversity of Illinois at Chicago

Continued biomedical advances and increased demands on quality health care have led to a new era of personalized medicine--a concept of medicine that uses specific infor- mation to an individual to help diagnose disease, plan treatment, assess treatment efficacy, and/or predict progno- sis. This concept has evolved from the idea of ＂pa- tient-centered care＂, which intends to shift the focus of health care from diseases to patients （Abujudeh et al., 2016）. Medical imaging is essential in the practice of mod- em medicine, and its role in personalized medicine has nev- er been greater. In particular, magnetic resonance （MR） imaging--a versatile and growing medical imaging modal- ity--is at the forefront leading the transformation from tra- ditional practice to personalized medicine. In 2001, a survey of leading physicians ranked MR imaging as well as CT scan as the most important medical innovations since 1980s （Fuchs et al., 2001）. Over the past four decades, MR imag- ing has shown an explosive growth and become the modal- ity of choice for assessment of the central nervous system,

关键词：个性化医疗磁共振成像生物医学中枢神经系统医学影像学医疗保健现代医学医疗成像

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A colorimetric nanobiosensor with enhanced sensitivity for detection of lead(Ⅱ)in real-water samples via an adeninecytosine mismatched DNAzyme

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Frontiers of Environmental Science & Engineering 2024年第12期18卷 167-177页

作者： Jinchuan Liu Hang Yang Huanxing Li Jiancheng Wang xiaohong zhou College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Key Joint Laboratory of ESPC School of EnvironmentTsinghua UniversityBeijing 100084China

Facile and ultrasensitive detection of Pb^(2+)in water for remote or resource-limited environments remains ***-based colorimetric nanobiosensors have been extensively studied to regulate the assembly of functionalized gold nanoparticles(AuNPs).However,these nanobiosensors have been criticized for their low sensitivity owing to the difficulty of dissociating DNAzyme embedded in AuNP *** address this issue,we rationally designed a DNAzyme by introducing an adenine-cytosine(A-C)mismatch to strengthen the disassembly of DNAzyme-linked *** proof of concept,a“turn on”colorimetric nanobiosensor integrated with mismatched DNAzyme and functionalized AuNPs was first developed for Pb^(2+)*** the optimal detection conditions,the obtained typical calibration curve shows a detection limit of 8.6 nmol/L,with an approximately 11-fold sensitivity improvement in Pb^(2+)detection compared with unmismatched DNAzyme,and a linear response range from 10 to 300 nmol/*** nanobiosensor demonstrated robust selectivity and satisfactory recovery rates between 86.5%and 106.4%for Pb^(2+)in spiked environmental water ***,the detection process is user-friendly and can be completed within 30 min,requiring only a simple water sample addition *** the extensive applications of DNAzyme in conjunction with nanoparticles,this study provides a valuable reference for designing other DNAzyme-powered nanoparticle assemblies in biosensing systems.

关键词： Trace lead(Ⅱ)ions Modified mismatched DNAzyme Gold nanoparticles Colorimetric nanobiosensor Environmental water samples

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