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Harmful evaluation of heavy metals from soil layer to the groundwater: Take the Jilin Hunchun Basin as an example

china Geology 2024年第1期7卷 116-124页

作者： Xiao-Dong Guo Qiang liu hui-Rong Zhang Xu-Fei Shi Chuan-Yu Qin Zhi-Qiang Zhang Shenyang Geological Survey center China Geological SurveyMinistry of Natural ResourcesShenyang 110034China Key Laboratory of Black Land Evolution and Ecological Effects Shenyang 110034China New Energy and Environment College Jilin UniversityChangchun 130026China Jilin Hydrogeological Survey Institute Changchun 130026China

The continuous enrichment of heavy metals in soils has caused potential harm to *** methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous *** on the theory of groundwater circulation and solid-liquid equilibrium,a simple and easy-touse flux model of soil heavy metals migrating to groundwater is *** on groundwater environmental capacity,an innovative method for evaluating the harm of heavy metals in soil to groundwater is proposed,which has been applied in Hunchun Basin,Jilin Province,*** results show that the fluxes of soil heavy metals into groundwater in the study area are Zn,Cu,As,Pb,Cd,Ni,and Hg in descending *** content of heavy metals in groundwater(As,Hg,Cu,Pb,Zn,Ni,and Cd)in most areas has not risen to the threshold of environmental capacity within 10 *** harm levels of soil heavy metals to groundwater in the most townships soils are at the moderate level or *** evaluation method can quantify the flux of soil heavy metals into groundwater simply and quickly,determine the residual capacity of groundwater to heavy metals,evaluate the harm level of soil heavy metals to groundwater,provide support for relevant departments to carry out environmental protection of soil and groundwater,and provide a reference to carry out similar studies for related scholars.

关键词： Soil heavy metals As+Hg+Cu+Pb+Zn+Ni+Cd Environmental capacity Groundwater Hazard degree Migration flux model Agricultural geological survey engineering Hunchun Basin Jilin Province

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Heat treatment of novel low-carbon multi-alloyed anti-wear marine steel

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Progress in Natural Science:Materials International 2011年第3期21卷 254-261页

作者： Jing-hua JIANG~(1,2.,Qiu-yue WANG~1,Ai-bin MA~(1,2.,Jun SHI~1,liu-yan ZHANG~1, hui-dong YANG~(2.3),Fu-min LU~2.Qi ZHOU~2.1.National Engineering Research {2. of Water Resources Efficient Utilization and Engineering Safety, Hohai University,Nanjing 2.0098,china 2.College of Mechanics and Materials,Hohai University,Nanjing 2.0098,china 3.Department of Mechanical and Aerospace Engineering,North Carolina State University, Raleigh,North Carolina 2.695-7919,USA [a] National Engineering Research center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 China [b] College of Mechanics and Materials Hohai University Nanjing 210098 China [c] Department of Mechanical and Aerospace Engineering North Carolina State University Raleigh North Carolina 27695-7919 USA

A low-carbon anti-wear steel,multi-alloyed with Si-Cr-Mn-Al-Ni-Mo-（Nb,RE）,was designed for vane pumps of ships. The novel cast steel after various heat treatments was characterized by microstructure observations and mechanical properties measurement in order to achieve an optimal process correlated with good abrasive resistance for a long marine *** scanning calorimetry and hardness analyses deduced a complete austenitizing temperature of 1 000℃,based on the alloying element homogenization and defective structure elimination without grain *** optimal austempering process（austenitized at 1 000℃,quick cooled for holding at 350℃for 1.5 h and then air-cooled to room temperature） produced a uniform mixture structure of fine carbide-free aciculate bainites and few lath martensites,resulting in the tensile strength increase of 34%and impact toughness increase of 50%compared with that of the as-cast *** abrasive wheel tests show that the austempered steel has good wear resistance with a mass-loss rate of 170 mg/（km·cm2. under applied load of 70 N in acidic *** new grade steel （containing anti-corrosion elements of Cr and rare earth） can find wide application in marine engineering,with further enhanced comprehensive properties via melting process improvement.

关键词： abrasive resistance carbide-free bainite marine steel mechanical performance heat treatment

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Transformation of human amniotic epithelial cells into neuron-like cells in the microenvironment of traumatic brain injury in vivo and in vitro

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Neural Regeneration Research 2011年第10期6卷 744-749页

作者： Yi Lu Guozhen hui Zhiyuan Wu tianjin {2. Xunhe Ji Lihe Guo Department of Neurosurgery First Affiliated Hospital of Soochow University Suzhou 215006 Jiangsu Province China Department of Neurosurgery First Hospital of Jiaxing City Jiaxing 314000 Zhejiang Province China Institute of Biochemistry and Cell Biology Shanghai Institute of Life Sciences Chinese Academy of Sciences Shanghai 200031 China

Survival and differentiation of transplanted cells is closely related to the local *** present study cultured human amniotic epithelial cells（HAECs） in a simulated microenvironment in vitro comprising RPMI 1640 culture medium and the solution extracted from injured brain *** HAECs were round,triangular in form or irregularly shaped,with extended neuron-like processes;some of the processes were interconnected,representing neuron-like morphology and some HAECs were microtubule-associated protein *** survived for at least 4 weeks following transplantation into the center and edges of the trauma focus with traumatic brain injury,and were microtubule-associated protein ***,the motor function of rat hind limbs was significantly improved.

关键词： traumatic brain injury microenvironment transplantation human amniotic epithelialcells neural cell differentiation neural regeneration

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Efficacy and safety of Qingfei Huatan formula in the treatment of acute exacerbation of chronic obstructive pulmonary disease:A multi-centre,randomised,double-blind,placebo-controlled trial

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Journal of Integrative Medicine 2024年第5期22卷 561-569页

作者： hui-zhi Zhu Cheng-yi Li Liang-ji liu Jia-bing Tong Zhi-hui Lan Shu-guang Tian Qiao Li Xiang-li Tong Ji-feng Wu Zhen-gang Zhu Su-yun Li Jian-sheng Li Department of Respiratory Medicine the First Affiliated Hospital of Anhui University of Traditional Chinese MedicineHefei 230031Anhui ProvinceChina Graduate School Anhui University of Traditional Chinese MedicineHefei 230012Anhui ProvinceChina Department of Respiratory Medicine Affiliated Hospital of Jiangxi University of Traditional Chinese MedicineNanchang 330006Jiangxi ProvinceChina Department of Respiratory Diseases the First Affiliated Hospital of Henan University of Traditional Chinese MedicineZhengzhou 450000Henan ProvinceChina Department of Pulmonary Diseases Taihe Hospital of Traditional Chinese Medicine Affiliated to Anhui University of Traditional Chinese MedicineFuyang 236600Anhui ProvinceChina Department of Respiratory and Critical Care Medicine Jiangxi Province Hospital of Integrated Chinese and Western MedicineNanchang 330002Jiangxi ProvinceChina Department of Respiratory Medicine the First Affiliated Hospital of Tianjin University of Traditional Chinese MedicineTianjin 300381China Collaborative Innovation center for Respiratory Disease Diagnosis and Treatment and Chinese Medicine Development of Henan Province Zhengzhou 450046Henan ProvinceChina

Background Chronic obstructive pulmonary disease(COPD),a common respiratory disease,can be effectively treated by traditional Chinese medicine(TCM).Qingfei Huatan,a TCM formula,has been reported to effectively alleviate the clinical symptoms of COPD ***,there is a lack of multi-centre,randomised,double-blind,controlled clinical trials documenting the clinical efficacy and safety of this formula in the treatment of acute exacerbation of COPD(AECOPD).Objective This study evaluated the efficacy and safety of Qingfei Huatan formula in the treatment of AECOPD,thereby providing high-quality clinical ***,setting,participants and interventions A total of 2.6 patients with AECOPD were included in this multi-centre,randomised,double-blind,placebo-controlled trial and were randomised into treatment and control groups at a ratio of 1:*** in the treatment and control groups took Qingfei Huatan granules or simulated Qingfei Huatan granules twice a day,for 14 days,in addition to Western medicine *** patients were followed up for 3 *** outcome measures The primary outcome was time taken to symptom *** secondary outcomes included duration of antibiotic use,clinical symptom and sign score,TCM syndrome score,dyspnoea score,and quality of life(QOL)***,the safety of the formula was assessed through routine urine and stool tests,electrocardiograms,liver and kidney function tests,and the observation of adverse events throughout the *** The time taken for effective stabilisation(P2.and 14 of treatment,clinical symptom and sign score decreased in both groups,particularly in the treatment group(P2.and 14 of treatment,the TCM syndrome scores of both groups were reduced(P<0.01),with more significant reductions in the treatm

关键词： Acute exacerbation of chronic obstructive pulmonary disease Clinical trial Syndrome of phlegm-heat congesting lung Qingfei Huatan formula Traditional Chinese medicine

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Targeted inhibition NCOA4-mediated ferritinophagy limits ferroptosis to ameliorate alcohol-induced liver injury in vivo and in vitro

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Food Science and Human Wellness 2024年

作者： Yanan Zhao Bin Li Jiang liu Fei Yu Lei Chen hui Teng College of Food Science and Technology， Guangdong Ocean University Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety Guangdong Province Engineering Laboratory for Marine Biological Products Guangdong Provincial Engineering Technology Research center of Seafood Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution

Alcoholic liver injury (ALD) is a serious liver disease resulting from prolonged and excessive alcohol consumption， with significant morbidity and mortality and closely relate to iron accumulation and ferroptosis. Ferritinophagy is the process of autophagic degradation of ferritin and results in labile iron accumulation and ferroptosis. However， whether ferritinophagy involves in alcohol-induced liver injury and ferroptosis remains unexplored. Here， we demonstrated the involvement of ferroptosis in alcohol-induced liver injury by modulating nuclear receptor coactivator 4 (NCOA4)-mediated ferritinophagy. Utilizing both in vivo and in vitro models， we observed activation of autophagy and ferroptosis following alcohol administration. Intriguingly， we found that alcohol-induced ferroptosis is autophagy-dependent， because autophagy inhibitor 3-MA (30 mg/kg bw. in vivo， 1 mM in vitro， respectively) profoundly mitigated alcohol-induced ferroptosis. We further demonstrated that alcohol-induced ferritinophagy was derived by iron overload， by showing that iron chelator DFO (100 mg/kg bw. in vivo， 10 μM in vitro， respectively) can abolish alcohol-induced ferritinophagy and ferroptosis. Moreover， we observed an upregulation of NCOA4 expression， and knockdown of NCOA4 significantly reversed alcohol-induced disturbances in iron metabolism and subsequently blocking ferroptosis. Our findings suggest a connection between ferritinophagy and alcohol-induced ferroptosis in mouse liver and HepG2.cells， highlighting NCOA4-mediated ferritinophagy as a novel mechanism of alcohol-induced liver injury. This study enhances our understanding of the molecular mechanisms underlying alcohol-induced liver injury， and targeting ferritinophagy may provide new strategies for preventing or treating ALD.

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干旱和复水对文冠果生长及生理生态特性的影响

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应用生态学报 2018年第6期29卷 1759-1767页

作者：谢志玉张文辉天津市耀华嘉诚国际中学天津300040 西北农林科技大学林学院陕西省林业综合实验室陕西杨凌712100

以文冠果2.生盆栽苗为材料,以2..8%~2..7%土壤含水量为对照,设置轻度干旱(14.3%~16.2.)、中度干旱(10.6%~12.5%)和重度干旱(6.8%~8.7%)3个干旱胁迫,研究干旱和复水对文冠果生长及生理生态特性的影响.结果表明:随着干旱胁迫的加剧,文冠... 详细信息

以文冠果2.生盆栽苗为材料,以2..8%~2..7%土壤含水量为对照,设置轻度干旱(14.3%~16.2.)、中度干旱(10.6%~12.5%)和重度干旱(6.8%~8.7%)3个干旱胁迫,研究干旱和复水对文冠果生长及生理生态特性的影响.结果表明:随着干旱胁迫的加剧,文冠果单株干质量、株高、基径、叶数和叶面积减小,主根和一级侧根长度增加;文冠果叶片气体交换各参数均逐渐降低,在10:00—14:00,净光合速率(P_n)的大小主要受气孔因素影响,14:00以后影响P_n的主要因素是非气孔因素;中度干旱和重度干旱胁迫下,文冠果对CO_2.用效率显著提高.随着干旱胁迫的加剧,PSⅡ潜在活性(F_v/F_o)、PSⅡ最大光化学量子产量(F_v/F_m)、光化学猝灭系数(q_P)、表观电子传递效率(ETR)和实际光化学量子产量(Ф_(PSⅡ ))逐渐减小,非光化学淬灭系数(NPQ)逐渐增大,复水后变化相反.复水后第8天,F_v/F_o、F_v/F_m、q_P、ETR、Ф_(PSⅡ)显著高于各胁迫处理第30天.随着干旱胁迫的加剧,超氧化物歧化酶、过氧化物酶活性升高,过氧化氢酶活性降低,丙二醛含量增加,复水后变化相反.复水后各干旱胁迫处理根系活力明显升高.文冠果有极强的适应极度干旱环境的能力,可以作为能源或园林植物在华北园林绿化中广泛应用.

关键词：文冠果干旱胁迫复水气体交换叶绿素荧光保护酶

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面板堆石坝三维耦合非线性数值计算

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天津大学学报（自然科学与工程技术版） 2004年第10期37卷 886-890页

作者：张社荣何辉天津大学建筑工程学院天津300072

基于发展的堆石料的静动力耦合模型,提出一种可以在加载过程中每一时步进行外荷载和位移的平衡迭代的三维有限元分析方法,一次性完成堆石坝的施工、蓄水、地震等渐近加载过程的数值仿真模拟.应用该方法对公伯峡面板堆石坝进行全过程的... 详细信息

基于发展的堆石料的静动力耦合模型,提出一种可以在加载过程中每一时步进行外荷载和位移的平衡迭代的三维有限元分析方法,一次性完成堆石坝的施工、蓄水、地震等渐近加载过程的数值仿真模拟.应用该方法对公伯峡面板堆石坝进行全过程的数值计算,得到坝体最大沉降为98.7cm,面板峰值动拉应力为5.36MPa;进一步说明计算得到的坝体静动态响应更接近实际情况.

关键词：公伯峡面板堆石坝静动力耦合有限元法

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A simple route for preparation of TRIP-assisted Si-Mn steel with excellent performance using direct strip casting

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2173-2181页

作者： hui Xu Lejun Zhou Wanlin Wang Yang Yi School of Metallurgy and Environment Central South UniversityChangsha 410083China National center for International Research of Clean Metallurgy Central South UniversityChangsha 410083China

The complex producing procedures and high energy-consuming limit the large-scale production and application of advanced high-strength steels(AHSSs).In this study,the direct strip casting(DSC)technology with unique sub-rapid solidification characteristics and cost advantages was applied to the production of low-alloy Si-Mn steel with the help of quenching&partitioning(Q&P)concept to address these *** this method with the conventional compact strip production(CSP)process,the initial microstructure formed under different solidification conditions and the influence of heat treatment processes on the final mechanical properties were *** results show that the initial structure of the DSC sample is a dual-phase structure composed of fine lath martensite and bainite,while the initial structure of the CSP sample consists of pearlite and *** volume fraction and carbon content of retained austenite(RA)in DSC samples are usually higher than those in CSP samples after the same Q&P *** samples typically demonstrate better comprehensive mechanical properties than the CSP *** DSC sample partitioned at 300℃ for 300 s(DSC-Pt300)achieves the best comprehensive mechanical properties,with yield strength(YS)of 12.2.MPa,ultimate tensile strength(UTS)of 1501 MPa,total elongation(TE)of 2..5%,and product of strength and elongation(PSE)as high as 32.3 GPa·%.These results indicate that the excellent mechanical properties in low-alloy Si-Mn steel can be obtained through a simple process(DSC-Q&P),which also demonstrates the superiority of DSC technology in manufacturing AHSSs.

关键词： direct strip casting sub-rapid solidification quenching and partitioning TRIP-assisted AHSSs microstructure

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Mathematical Model for Electroosmotic Dewatering of Activated Sludge

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Transactions of tianjin University 2011年第1期17卷 39-44页

作者：于晓艳张书廷郑磊刘勇徐晖 School of Environmental Science and Engineering Tianjin University

The mechanical dewatering of activated sludge is difficult due to its high compressibility, which can be improved by electroosmosis. In electroosmosis, direct electric field is applied to sludge cake. Based on the conductivity modes of different sludge beds, a model is presented in which sludge cake consists of two series parts in the circuit: a dewatered bed and an undewatered one. The dewatered bed called solid conductor is mainly made up of immovable water and sludge particles. The undewatered bed includes movable water and solid conductor, which are connected in parallel in the circuit. The model describes the variation of water content with time and electric power consumption as a function of water content in sludge cake, and interprets the reason for the variation of electroosmotic dewatering rate. Comparison with the experimental data for electroosmotic dewatering under constant voltage supports the validity of the model.

关键词： electroosmotic dewatering activated sludge conductivity electric power consumption

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Aircraft parameter estimation using a stacked long short-term memory network and Levenberg-Marquardt method

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Chinese Journal of Aeronautics 2024年第2期37卷 123-136页

作者： Zhe hui Yinan KONG Weigang YAO Gang CHEN School of Aerospace Science and Technology Xidian UniversityXi’an 710071China Computation Aerodynamics Institution China Aerodynamics Research and Development CenterMianyang 621000China Faculty of Computing Engineering and MediaDe Montfort UniversityLeicester LE19BHUnited Kingdom School of Aerospace Engineering Xi’an Jiaotong UniversityXi’an 710049China

To effectively estimate the unknown aerodynamic parameters from the aircraft’s flight data,this paper proposes a novel aerodynamic parameter estimation method incorporating a stacked Long Short-Term Memory(LSTM)network model and the Levenberg-Marquardt(LM)*** stacked LSTM network model was designed to realize the aircraft dynamics modeling by utilizing a frame of nonlinear functional mapping based entirely on the measured input-output data of the aircraft system without requiring explicit postulation of the *** LM method combines the already-trained LSTM network model to optimize the unknown aerodynamic *** proposed method is applied by using the real flight data,generated by ATTAS aircraft and a bio-inspired morphing Unmanned Aerial Vehicle(UAV).The investigation reveals that for the two different flight data,the designed stacked LSTM network structure can maintain the efficacy of the network prediction capability only by appropriately adjusting the dropout rates of its hidden layers without changing other network parameters(i.e.,the initial weights,initial biases,number of hidden cells,time-steps,learning rate,and number of training iterations).Besides,the proposed method’s effectiveness and potential are demonstrated by comparing the estimated results of the ATTAS aircraft or the bio-inspired morphing UAV with the corresponding reference values or wind-tunnel results.

关键词： Parameter estimation LSTM network model LM method Aerodynamic parameters Flight data Aircraft dynamics modeling Network prediction capability Network parameters

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