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Journal of Iron and Steel Research International 2024年第9期31卷 2255-2270页

作者： Meng-wei Lu Xin Chen Wen-xi Liu Yu-ru Chen Qi Li Kai wang zu-min wang Yuan Huang Institute of Advanced Metallic Materials School of Materials Science and EngineeringTianjin UniversityTianjin300350China

A medium-carbon low-alloy steel with designed chemical composition was *** steel exhibits an excellent product of strength and elongation value of 31,832 MPa%through quenching and partitioning treatment,with a tensile strength of 1413 MPa and elongation of 22%.X-ray diffraction analysis and transmission electron microscopy characterizations confirm that the retained austenite in the specimens undergoes stress-induced phase transformation to the martensite and hexagonal phases,namely the transformation-induced plasticity(TRIP)effect is *** TRIP effect,triggered by the stress-induced phase transition of retained austenite,is responsible for the excellent mechanical properties obtained in the *** further investigating the stress-induced phase transition mechanism,thermodynamic methods are *** free energy of face-centered cubic-Fe,ε-Fe,ω-Fe and body-centered cubic-Fe associated with the stress-induced phase transition was calculated using molecular dynamics simulations,and a calculation method of strain energy in thermodynamic units for the stress-induced martensitic transformation is *** final results reveal the process and thermodynamic mechanism of stress-induced martensitic transformation in medium-carbon steels,in which the hexagonal phase can participate in the process as an intermediate product.

关键词： Medium-carbon low-alloy steel Product of strength and elongation Stress-induced martensitic transformation Transformation-induced plasticity effect ω-Fe phase

Study on Interaction Between Two Parallel Plates with Iteration Method in Functional Theory

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Chinese Journal of Chemical Physics 2008年第2期21卷 131-135页

作者： ming Zhou Zheng-wu wang zu-min Xu Department of Food Science and Technology School of Agriculture and Biology Shanghai Jiao Tong University Shanghai 200240 China School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China

By introducing the functional theory into the calculation of electric double layer （EDL） interaction, the interaction energies of two parallel plates were calculated respectively at low, moderate, and high potentials. Compared with the results of two existing methods, Debye-Hückel and Langmuir methods, which are applicable just to the critical potentials and perform poorly in the intermediate potential, the functional approach not only has much simpler expression of the EDL interaction energy, but also performs well in the entire range of potentials.

关键词： Interaction energy Functional theory Electric double layer Parallel plate

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甲基磺酸铅连续电积精铅研究

有色金属（冶炼部分） 2025年第1期 7-15页

作者：张壮谢锋王伟祖壮志东北大学冶金学院沈阳110819

开发了以甲基磺酸铅为电解质的连续旋转电积精铅工艺及装备。通过系统考察电流密度、刮取时间、极间距、蠕动泵流速、甲基磺酸浓度、复溶、Pb^(2+)浓度和温度等因素对电积过程电流效率、平均槽电压及能耗的影响规律,得到了连续电积精铅... 详细信息

开发了以甲基磺酸铅为电解质的连续旋转电积精铅工艺及装备。通过系统考察电流密度、刮取时间、极间距、蠕动泵流速、甲基磺酸浓度、复溶、Pb^(2+)浓度和温度等因素对电积过程电流效率、平均槽电压及能耗的影响规律,得到了连续电积精铅的优化条件,验证了新型连续电积精铅装备的应用可行性和有效性。结果表明,在电流密度200 A/m^(2)、刮取时间2 h、极距40 mm、蠕动泵流速300 mL/min、甲基磺酸浓度1 mol/L、Pb^(2+)浓度1 mol/L、温度40℃的条件下,可以获得纯度为99.996%、结构紧密且较易刮取的精铅产品,电解过程的电流效率大于97%,平均能耗为659.74 kWh/t。

关键词：甲基磺酸铅连续旋转电积精铅

Very Large Eddy Simulation of Cavitation from Inception to Sheet/Cloud Regimes by A Multiscale Model

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China Ocean Engineering 2021年第3期35卷 361-371页

作者： LI Lin-min wang Zheng-dong LI Xiao-jun wang Yan-ping ZHU zu-chao National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology Zhejiang Sci-Tech UniversityHangzhou 310018China

The cavitating flow in different regimes has the intricate flow structure with multiple time and space *** present work develops a multiscale model by coupling the volume of fluid(VOF)method and a discrete bubble model(DBM),to simulate the cavitating flow in a convergent-divergent test *** Schnerr-Sauer cavitation model is used to calculate the mass transfer rate to obtain the macroscale phase structure,and the simplified Rayleigh-Plesset equation is applied to simulate the growing and collapsing of discrete *** algorithm for bridging between the macroscale cavities and microscale bubbles is also developed to achieve the multiscale *** the flow field,the very large eddy simulation(VLES)approach is *** from inception to sheet/cloud cavitation regimes are taken into account and simulations are *** with the experimental observations,it is shown that the cavitation inception,bubble clouds formation and glass cavity generation are all well represented,indicating that the proposed VOF-DBM model is a promising approach to accurately and comprehensively reveal the multiscale phase field induced by cavitation.

关键词： cavitating flow multiscale model volume of fluid discrete bubble model VLES

Subcellular distribution and chemical form of Pb in hyperaccumulator Arenaria orbiculata and response of root exudates to Pb addition

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 250-258页

作者： Yanqun zu Yuan LI Huan min Fangdong ZHAN Li QIN Jixiu wang College of Resources and Environment Yunnan Agricultural University Kunming 650201 China

Solution culture was conducted in order to understand accumulation characteristics and chemical forms of Pb in Arenaria orbiculata （A. orbiculata） and the response of root exudates to Pb addition. The results showed that： 1） Pb contents in the shoot and root of A. orbiculata increased with increasing in Pb concentrations in solution. 2） The contents of Pb chemical forms under Pb addition followed as： HAc extractable fraction＇（FriAC）〉 HC1 extractable fraction （FHcl）〉 NaCl extractable fraction （FNacl）〉 ethanol-extractable fraction （FE）〉 water extractable fraction （Fw）. 3） Increased Pb level in the medium caused increases in Pb contents in the four subcellular fractions of shoots and roots, with most accumulation in FIV （Fraction ＇IV, sbluble fraction） in shoots and FI （Fraction I, cell wall fraction） in roots. 4） Contents of soluble sugar and free amino acid of root exudates increased with increasing Pb concentration in solution. Significantly positive correlations between Pb and contents of soluble sugar and free amino acid were observed. 5） With Pb concentrations in solution, low molecular weight organic acids （LMWOAs） contents followed the tendency： tartaric acid 〉 acetic acid 〉 malic acid 〉 citric acid. Significantly positive correlation was observed between Pb and citric acid contents. The results indicate that soluble sugars, free amino acid and citric acid in root exudates of *** facilitate the absorption and accumulation of Pb, which exist in NaCl-, HCI- and HAc- extractable Pb forms, FI and FIV fractions, resulting in tolerance of *** to Pb.

关键词： Pb Arenaria orbiculat'a chemical forms,subcellular distribution root exudates hydroponic c/ilture

A probabilistic model based on the peak-over-threshold approach for risk assessment of airport controllers’performance

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Journal of Safety Science and Resilience 2024年第1期5卷 110-118页

作者： Lili zu Yijie Lu min Dong College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Engineering and Applied Science George Washington UniversityWashington DC 20052USA College of Civil Aviation Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Airport tower control plays an instrumental role in ensuring airport ***,obtaining objective,quantitative safety evaluations is challenging due to the unavailability of pertinent human operation *** study introduces a probabilistic model that combines aircraft dynamics and the peak-over-threshold(POT)approach to assess the safety performance of airport *** applied the POT approach to model reaction times extracted from a radiotelephony dataset via a voice event detection *** model couples the risks of tower control and aircraft operation to analyze the influence of human *** data from radiotele-phony communications and the Base of Aircraft Data(BADA)database,we compared risk levels across *** findings revealed heightened airport control risks under low demand(0.374)compared to typical conditions(0.197).Furthermore,the risks associated with coupling under low demand exceeded those under typical de-mand,with the final approach stage presenting the highest risk(4.929×107).Our model underscores the significance of human factors and the implications of mental disconnects between pilots and controllers for safety ***,these consistent findings affirm the reliability of our probabilistic model as an evaluative tool for evaluating the safety performance of airport tower *** results also illuminate the path toward quantitative real-time safety evaluations for airport controllers within the *** recommend that airport regulators focus on the performance of airport controllers,particularly during the final approach stage.

关键词： Safety evaluation Performance Probabilistic model Task demand Airport controller

Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第6期14卷 526-532页

作者： Zhen-zhen PENG Xin-min CHEN Jun wang Ai-jie LI zu-jie XU State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan University

Objective:This study investigated the effect of proximal contact strength on the three-dimensional displacements of cantilever fixed partial denture(CFPD) under vertically concentrated loading with digital laser speckle(DLS) ***:Fresh mandible of beagle dog was used to establish the implant-supported CFPD for *** technique was employed for measuring the three-dimensional displacement of the prosthesis under vertically concentrated loading ranging from 200 to 3 000 *** effect of the contact tightness on the displacement of CFPD was investigated by means of changing the contact ***:When an axial concentrated loading was exerted on the pontic of the implant-supported CFPD,the displacement of the CFPD was the *** displacement of the prosthesis decreased with the increase of contact *** the contact strength was 0,0.95,and 3.25 N,the displacement of the buccolingual direction was smaller than that of the mesiodistal direction but greater than that of the occlusogingival *** the force on the contact area was 6.50 N,the mesiodistal displacement of the prosthesis was the biggest while the buccolingual displacement was the ***:The implant supported CFPD is an effective therapy for fully or partially edentulous *** restoration of the contact area and the selection of the appropriate contact strength can reduce the displacement of the CFPD,and get a better stress *** most appropriate force value is 3.25 N in this study.

关键词： Cantilever fixed partial denture Digital laser speckle technique Contact strength Three-dimensional displacement

Comparison of displacement damage effects on the dark signal in CMOS image sensors induced by CSNS back-n and XAPR neutrons

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Nuclear Science and Techniques 2024年第10期35卷 29-40页

作者： Yuan-Yuan Xue zu-Jun wang Wu-Ying Ma min-Bo Liu Bao-Ping He Shi-Long Gou State Key Laboratory of Intense Pulsed Irradiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi’an 710024China State Key Laboratory of Artificial Microstructure and Microscopic Physics School of Physics Peking UniversityBeijing 100871China

This study investigates the effects of displacement damage on the dark signal of a pinned photodiode CMOS image sensor(CIS)following irradiation with back-streaming white neutrons from white neutron sources at the China spallation neutron source(CSNS)and Xi'an pulsed reactor(XAPR).The mean dark signal,dark signal non-uniformity(DSNU),dark signal distribution,and hot pixels of the CIS were compared between the CSNS back-n and XAPR neutron *** nonionizing energy loss and energy distribution of primary knock-on atoms in silicon,induced by neutrons,were calculated using the open-source package *** analysis combining experimental and simulation results showed a noticeable proportionality between the increase in the mean dark signal and the displacement damage dose(DDD).Additionally,neutron energies influence DSNU,dark signal distribution,and hot *** neutron energies at the same DDD level may lead to pronounced dark signal non-uniformity and elevated hot pixel values.

关键词： Displacement damage effects CMOS image sensor(CIS) CSNS back-n XAPR neutrons Geant4 Dark signal non-uniformity(DSNU)

Endonuclease-rolling circle amplification-based method for sensitive analysis of DNA-binding protein

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Chinese Chemical Letters 2009年第11期20卷 1315-1318页

作者： min Li Li Dong Rui Zhou Hong Zhao Jin Ke wang zu Hong Lu The State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China Key Laboratory of Child Development and Learning Science Ministry of Education Southeast University Nanjing 210096 China

A sensitive approach for the qualitative detection of DNA-binding protein on the microarray was developed. DNA complexes in which a partial duplex region is formed from a biotin-primer and a circle single strand DNA （ssDNA） were spotted on a microarray. The endonuclease recognition site （ERS） and the DNA-binding sites （DBS） were arranged side by side within the duplex region. The working principle of the detection system is described as follows： when the DNA-binding protein capture the DBS, the endonuclease could not attach to the ERS, and the immobilized primer in the DNA complex could be extended along the circle ssDNA by rolling circle amplification （RCA）. When no protein protects the DBS, the ERS could be attacked by the endonuclease and subsequently no rolling circle amplification occurs. Thereby we can detect the sequence specific DNA-binding activity with high-sensitivity due to the signal amplification of RCA.

关键词： Rolling circle amplification DNA-binding protein Microarray

Dauricine can inhibit the activity of proliferation of urinary tract tumor cells

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Asian Pacific Journal of Tropical Medicine 2012年第12期5卷 973-976页

作者： Jun wang Yuan Li Xiong-Bing zu min-Feng Chen Lin Qi Department of Urology Xiangya HospitalCentral South University

Objective:To explore the anti-tumor effects of asiatic moonseed rhizome extraction-dauricine on bladder cancer EJ cell strain,prostate cancer PC-3Mcell strain and primary cell culture ***:The main effective component-phenolic alkaloids of Menispermum dauricum was extracted and separated from asiatic moonseed rhizome by chemical *** method was used to detect dauricine anti-tumor ***:Dauricine had an obvious proliferation inhibition effect on the main tumor cells in urinary *** minimum drug sensitivity concentration was between ***μg/mL,and the inhibition ratio increased with the increase of ***:Dauricine,the main effective component extracted from asiatic moonseed rhizome,had a good inhibition effect on tumor cells in urinary *** the same time,Dauricine has certain inhibition effects on the primary cultured tumor cell.

关键词： PAMD Dauricine Urinary system EJ cell strain PC-3Mcell strain