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Genesis and Quality of Groundwater in the Southeastern Region of Southern Vietnam

Journal of Environmental Science and Engineering(A) 2017年第6期6卷 277-292页

作者： Chau Tran Vinh Tran Hong Thai Doan Van Canh Dang Due Nhan nguyen cao huan nguyen Van Nghia nguyen Hong Hieu Trinh Thi Thu Van Department of Water Resources Management Ministry of Natural Resources and Environment Hanoi 100000 Vietnam National Meteorological and Hydrological Center Hanoi 100000 Viemam Hydrogeology Assoeiation of Vietnam Hanoi 100000 Vietnam Department of Geology Hanoi University of Natural Sciences Hanoi 100000 Vietnam

The origin and quality of groundwater in the Southeastern region （belongs to Southern Plain） were identified by using isotopic techniques and geochemical analysis. Groundwater samples were collected from 7 aquifers： the Holocene, upper Pleistocene, middle Pleistocene, lower Pleistocene, upper Pliocene, middle Pliocene and Miocene aquifers. The water isotopic compositions （82H and 8180） were determined to elucidate the origin and the interaction between surface water and groundwater studies. Transit time （age） of the groundwater samples was determined to explain the direction of groundwater flow. The dating techniques included 3H and ^14C isotopes measurement, followed by a correction for the initial ^14C-activity by the ^13C-composition （^13C） in TDIC （Total Dissolved Inorganic Carbon）. Geochemical parameters of the groundwater samples were measured either directly in the field or in the laboratory. The results showed that the groundwater from the Holocene and upper Pleistocene aquifers was most recharged from the local meteorological and hydrological systems, including local precipitation, fiver and reservoirs. Thus, it has short transit time and its stable isotopic composition is spread around the local meteoric waterline and lines for rivers or reservoirs water. The groundwater in the deeper aquifers： middle and lower Pleistocene, and Neogene aquifers has old age up to 22.5 ka BP. Its water seems to be recharged from the areas with an altitude from 600 to 700 m higher to the Neogene deposit layer altitude. The groundwater in the SE SP （South-Eastern Southern Plain） region has a high quality. The water type is Na-Ca-Mg-HCO3 with low content of chloride and TDS （Total Dissolved Solids）. Calcite/dolomite and gypsum dissolution, organic matter decomposition and sequence of red-ox reactions proceeding through different electron acceptors sediment were controlled the chemistry of the groundwater in the study region.

关键词： Water isotopic composition ^14C-dating groundwater South-Eastern Southern Plain region Vietnam.

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Condition monitoring and fault diagnosis of industrial robots: A review

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Science China Technological Sciences 2025年第1期 121-145页

作者： Yaguo LEI huan LIU Naipeng LI Junyi cao Yuting QIAO Hongbo WANG Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi'an Jiaotong University

Health management of industrial robots is paramount for maintaining effective operations, ensuring consistent performance, minimizing downtime, and ultimately enhancing the safety and productivity of robotic systems. Since the invention of industrial robots, significant efforts have been dedicated to their health management. In recent years, thanks to advances in condition monitoring and fault diagnosis technologies of industrial robots, robot health management has shifted from scheduled maintenance to condition-based maintenance. This paper aims to comprehensively review the evolution of condition monitoring and fault diagnosis technologies that are critical for implementing condition-based maintenance of industrial robots. A brief introduction to robotic systems is given first to analyze the robot failure modes and their corresponding root causes. Next, the data acquisition strategies and commonly used sensors of industrial robots are ***, the development of robot condition monitoring and fault diagnosis technologies are reviewed, with an emphasis on the remarkable achievements and challenges in model-based and data-driven methods. Finally, the paper summarizes the challenges facing this research field and provides potential avenues for future advancements.

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太湖底泥磷释放量及释放规律的研究综述

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湖泊科学 2025年第1期37卷 14-35页

作者：朱伟侯豪刘环许小格朱瑜星陈诺曹俊林乃喜河海大学环境学院南京210098 河海大学土木与交通学院南京210098 河海大学水科学研究院南京210098

太湖是我国最为重要的湖泊之一,是国家湖泊治理的重点。自2007年水危机以来,太湖治理累计投入超2620亿元,是世界上治理力度最大的湖泊。2016年以来太湖出现磷反弹,2020年开始显著好转,2023年水华减少。太湖蓝藻水华与磷的响应相对显著,... 详细信息

太湖是我国最为重要的湖泊之一,是国家湖泊治理的重点。自2007年水危机以来,太湖治理累计投入超2620亿元,是世界上治理力度最大的湖泊。2016年以来太湖出现磷反弹,2020年开始显著好转,2023年水华减少。太湖蓝藻水华与磷的响应相对显著,回顾太湖磷十余年来的研究,关于底泥内源释放对水体总磷贡献的说法不一,这对于太湖整体磷负荷的认识及内源治理措施的制定产生了重要影响。针对太湖底泥磷的源汇、释放量以及释放规律,本文对国内外关于湖泊底泥磷释放的监测、实验、计算等研究进行系统回顾,对关于太湖底泥释放方面的研究进行梳理。通过比较和分析,尝试形成对太湖底泥磷释放规律和范围的一些基本认识。通过综述总结提出了“总源”“总汇”“净源”“净汇”的概念,并对可能成为“净源”的5个过程的发生条件和释放强度进行分析。认为Fick扩散释放是可以恒常性发生的过程,而在具备条件才发生的过程中,DO<2 mg/L后出现的磷还原释放是比较主要的过程,需要重点关注。“净源”是否发生应该依据实际湖泊的环境条件开展动态释放实验来判断。太湖目前虽然处于“总汇”状态,但“净源”是显著存在的,明确“净源”存在的位置和发生的时段对于太湖内源治理非常重要。

关键词：太湖底泥磷释放源汇质量平衡释放实验

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Investigations on the Interactions between Li-TFSI and Glass Fibers in the Ternary PP/GF/Li-TFSI Composites

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Chinese Journal of Polymer Science 2018年第1期36卷 113-118页

作者： Sen-Lin Gu huan-huan Liu huan cao Claude Mercier Yong-Jin Li College of Material Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 310036China Solvay Co.Ltd shanghai 201100China

The polypropylene/glass fiber（PP/GF） composites with excellent antistatic performance and improved mechanical properties have been reported by incorporation of a very small amount of the organic salt, lithium bis（trifluoromethanesulfonyl）imide（Li-TFSI）, into the PP/GF composites. It was considered that GF could play the role as the pathways for the movements of ions in the ternary composites. In this work, the interactions between Li-TFSI and glass fiber and the effects of such interactions on the physical properties of the composites have been systematically investigated. Three types of glass fibers with different ―OH group concentrations have been prepared in order to compare the interactions between GF and Li-TFSI. It was found that the ―OH group concentrations on the surface of glass fiber have significant effects on interactions between glass fibers and Li-TFSI. Such interactions are crucial for both the antistatic and mechanical performances of the final PP/GF/Li-TFSI composites. The investigation indicated that the GF with high ―OH group concentrations confined the movement of TFSI-, which decreased the antistatic properties of PP/GF/Li-TFSI composites. On the other hand, the GF with low ―OH group concentrations inhibited the absorption of Li-TFSI onto the GF, which also hindered the formation of Li-TFSI conductive pathway. The best antistatic performance of the ternary composites can be achieved at the intermediate ―OH concentrations on the GF.

关键词： Polypropylene Glass fiber Li-TFSI Antistatic performance

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Forecasting measured responses of structures using temporal deep learning and dual attention

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 832-850页

作者： Viet-Hung DANG Trong-Phu nguyen Thi-Lien PHAM huan X.nguyen Department of Structural Mechanics Hanoi University of Civil EngineeringHanoi 11600Vietnam Faculty of Applied Science University of Economics-Technology for IndustriesHanoi 11600Vietnam London Digital Twin Research Centre Faculty of Science and TechnologyMiddlesex UniversityLondon NW44BTUK International School Vietnam National UniversityHanoi 11600Vietnam

The objective of this study is to develop a novel and efficient model for forecasting the nonlinear behavior of structures in response to time-varying random *** key idea is to design a deep learning architecture to leverage the relationships,between external excitations and structure's vibration signals,and between historical values and future values,within multiple time-series *** proposed method consists of two main steps:the first step applies a global attention mechanism to combine multiple-measured time series and time-varying excitation into a weighted time series before feeding it to a temporal architecture;the second step utilizes a self-attention mechanism followed by a fully connected layer to predict multi-step future *** viability of the proposed method is demonstrated via two case studies involving synthetic data from a three-dimensional(3D)reinforced concrete structure and experimental data from an 18-story steel ***,comparison and robustness studies are carried out,showing that the proposed method outperforms conventional methods and maintains high performance in the presence of noise with an amplitude of less than 10%.

关键词： structural dynamic time-varying excitation deep learning signal processing response forecasting

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双组分调控系统对革兰氏阴性菌抗生素耐药性的调控研究进展

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食品与发酵工业 2025年第1期51卷 381-389页

作者：刘欢刘畅雷化雨曹娟娟王英英赵燕妮陕西科技大学食品科学与工程学院陕西西安710021 陕西农产品加工技术研究院陕西西安710021

抗生素的滥用导致细菌的耐药性不断增强,其中多重耐药革兰氏阴性菌的检出率不断上升,不仅严重威胁人类健康,还对食品生产和加工环节构成了巨大风险。双组分调控系统(two-component regulatory systems,TCSs)广泛存在于革兰氏阴性菌中,... 详细信息

抗生素的滥用导致细菌的耐药性不断增强,其中多重耐药革兰氏阴性菌的检出率不断上升,不仅严重威胁人类健康,还对食品生产和加工环节构成了巨大风险。双组分调控系统(two-component regulatory systems,TCSs)广泛存在于革兰氏阴性菌中,由感受信号的组氨酸激酶和相应的响应调节蛋白组成,是细菌体内重要的信号转导系统,广泛参与细菌不同生理进程,并对细菌耐药性具有重要调控作用,因此,针对TCSs的靶向干预被视为潜在的抗耐药策略。该综述从TCSs及其在革兰氏阴性菌不同抗生素耐药性机制中的调控作用(调控抗生素灭活酶合成,调控细胞表面的修饰,药物流入或流出调节和其他调控机制)出发,阐述TCSs在革兰氏阴性菌对抗生素耐药性的调控作用研究进展,旨在为预防和控制食源性耐药病原菌提供理论依据和参考。

关键词：双组分调控系统革兰氏阴性菌耐药性抗生素机制

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Current hydrogel advances in physicochemical and biological response-driven biomedical application diversity

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Signal Transduction and Targeted Therapy 2022年第1期7卷 64-94页

作者： huan cao Lixia Duan Yan Zhang Jun cao Kun Zhang Department of Nuclear Medicine West China Hospitaland National Engineering Research Center for BiomaterialsSichuan University610064 ChengduP.R.China Department of Medical Ultrasound and Central Laboratory Shanghai Tenth People's HospitalTongji University School of MedicineNo.301 Yan-chang-zhong Road200072 ShanghaiPeople's Republic of China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

Hydrogel is a type of versatile platform with various biomedical applications after rational structure and functional design that leverages on material engineering to modulate its physicochemical properties(e.g.,stiffness,pore size,viscoelasticity,microarchitecture,degradability,liga nd prese ntation,stimulus-resp on sive properties,etc.)and in flue nee cell signaling cascades and *** the past few decades,a plethora of pioneering studies have been implemented to explore the cell-hydrogel matrix interactions and figure out the underlying mechanisms,paving the way to the lab-to-clinic translation of hydrogel-based *** this review,we first introduced the physicochemical properties of hydrogels and their fabrication approaches ***,the comprehensive description and deep discussion were elucidated,wherein the influences of different hydrogels properties on cell behaviors and cellular signaling eve nts were *** behaviors or events in eluded integrin clustering,focal adhesion(FA)complex accumulation and activation,cytoskeleton rearrangement,protein cyto-nuelei shuttling and activation(e.g.,Yes-associated protein(YAP),catenin,etc.),cellular compartment reorganization,gene expression,and further cell biology modulation(e.g.,spreading,migration,proliferation,lineage commitment,etc.).Based on them,current in vitro and in vivo hydrogel applications that mainly covered diseases models,various cell delivery protocols for tissue regeneration and disease therapy,smart drug carrier,bioimaging,biosensor,and conductive wearable/implantable biodevices,*** further summarized and *** significantly,the dinical translation potential and trials of hydrogels were presented,accompanied with which the remaining challenges and future perspectives in this field were ***,the comprehe nsive and deep in sights in this review will shed light on the design principles of new biomedical hydrogels to understand and modulate

关键词： hydrogel summarized rational

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左西孟旦联合膈肌电刺激对困难脱机风险患者的临床疗效

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中国医学创新 2025年第1期22卷 35-38页

作者：关欢曹猛方景云赣州市人民医院急诊科江西赣州341000

目的:观察左西孟旦联合膈肌电刺激对困难脱机风险患者的临床疗效。方法:选择2021年12月—2023年12月于赣州市人民医院就诊的困难脱机风险患者92例,采用随机数字表法将其分成常规组(n=46)与观察组(n=46)。常规组接受膈肌电刺激治疗,观察... 详细信息

目的:观察左西孟旦联合膈肌电刺激对困难脱机风险患者的临床疗效。方法:选择2021年12月—2023年12月于赣州市人民医院就诊的困难脱机风险患者92例,采用随机数字表法将其分成常规组(n=46)与观察组(n=46)。常规组接受膈肌电刺激治疗,观察组在常规组的基础上接受左西孟旦治疗。比较两组ICU住院时间、呼吸机使用时长、脱机相关指标、炎症因子及脱机成功率。结果:观察组ICU住院时间、呼吸机使用时长均短于常规组(P0.05);治疗48 h后,两组N末端B型利钠肽原(NT-proBNP)水平均降低,且观察组较常规组低,氧合指数均升高,且观察组较常规组高,差异均有统计学意义(P0.05);两组治疗48 h后的IL-6、TNF-α均降低,观察组均较常规组低(P<0.05)。观察组脱机成功率高于常规组,差异有统计学意义(P<0.05)。结论:左西孟旦联合膈肌电刺激应用于困难脱机风险患者,可缩短ICU住院时间、呼吸机使用时长,减轻炎症反应,调节氧合指数、NT-proBNP水平,提高脱机成功率。

关键词：膈肌电刺激左西孟旦困难脱机脱机成功率

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3D MXene architectures as sulfur hosts for high-performance lithium-sulfur batteries

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Journal of Energy Chemistry 2022年第3期31卷 429-439,I0012页

作者： Yu-Hong Liu cao-Yu Wang Si-Lin Yang Fei-Fei cao huan Ye College of Science Huazhong Agricultural UniversityWuhan 430070HubeiChina

Lithium-sulfur batteries(LSBs)are one of the most promising energy storage devices because of their high theoretical energy density;however,inherent issues including poor electrical conductivity and severe dissolution of S and its discharged products hinder their practical *** have metallic conductivity,ultra-thin two-dimensional(2D)structures,rich surface functional groups,and macrostructural adjustability and have been widely used to design advanced sulfur hosts.3D network structures assembled by 2D MXene nanosheets have shown superior performance for improving reaction kinetics,accommodating and dispersing sulfur at the micro-/nanoscale,and capturing polysulfides due to their porous interconnected ***,the applications of MXene architectures related to 2D layered structures,3D multilayered structures,and 3D spherical structures as sulfur hosts are *** structure-performance relationship,challenges for current designs,and opportunities for future 3D architectures for LSBs are also analyzed.

关键词： Lithium-sulfur batteries Cathodes Sulfur hosts MXenes 3D architectures

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Joint position optimization,user association,and resource allocation for load balancing in UAV-assisted wireless networks

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Digital Communications and Networks 2024年第1期10卷 25-37页

作者： Daosen Zhai huan Li Xiao Tang Ruonan Zhang Haotong cao School of Electronics and Information Northwestern Polytechnical UniversityXian710072China State Key Laboratory of Integrated Services Networks Xidian UniversityXian710071China Department of Computing Hong Kong Polytechnic UniversityHong Kong SARChina

Unbalanced traffic distribution in cellular networks results in congestion and degrades spectrum *** tackle this problem,we propose an Unmanned Aerial Vehicle(UAV)-assisted wireless network in which the UAV acts as an aerial relay to divert some traffic from the overloaded cell to its adjacent underloaded *** fully exploit its potential,we jointly optimize the UAV position,user association,spectrum allocation,and power allocation to maximize the sum-log-rate of all users in two adjacent *** tackle the complicated joint optimization problem,we first design a genetic-based algorithm to optimize the UAV ***,we simplify the problem by theoretical analysis and devise a low-complexity algorithm according to the branch-and-bound method,so as to obtain the optimal user association and spectrum allocation *** further propose an iterative power allocation algorithm based on the sequential convex approximation *** simulation results indicate that the proposed UAV-assisted wireless network is superior to the terrestrial network in both utility and throughput,and the proposed algorithms can substantially improve the network performance in comparison with the other schemes.

关键词： Load balance Unmanned aerial vehicle Userassociation Resource management

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