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| 1 | High-temperature oxidation behavior of modified 4Al alumina-forming austenitic steel: Effect of cold rolling显示文摘The oxidation behavior and mechanism of as-received and 30 % cold-rolled alumina-forming austenitic(AFA) steel were investigated in dry air at 700℃.The results show that the mass gain per unit area curves of as-received and 30 % cold-rolled steels subject to near-parabolic law before 100 h oxidation time.Two samples both show higher high-temperature oxidation resistance due to the formation of dense Al_(2)O_(3) oxide scale.Gradual spallation of outer scale results in the formation of continuous and dense alumina scale.Dislocations can act as short-circuit diffusion channel for the diffusion of Al from alloy matrix to surface,and also provide nucleation sites for B2-NiAl phase,which ensure the continuous formation of Al_(2)O_(3) scale. | Qiuzhi Gao Ziyun Liu Huijun Li Hailian Zhang Chenchen Jiang Aimin Hao Fu Qu Xiaoping Lin | 2021 | Journal of Materials Science & Technology2021，，9： | 5 |
| 2 | Multipoint observations of Pi2 pulsations and correlation with dynamic processes in the near-Earth magnetotail on March 18,2009显示文摘Simultaneous measurements from THEMIS spacecraft,GOES-11 and ground stations(Canadian Array for Realtime Investigations of Magnetic Activity or CARISMA,and 210°magnetic meridian or MM)on March 18,2009 allow the study of dynamic processes in the near-Earth magnetotail and corresponding Pi2 pulsations on the ground in great detail.Fast earthward flows along with traveling Alfvén waves and fast mode waves in the Pi2 band were observed by three Time History of Events and Macroscale Interactions during Substorms(THEMIS)probes(P3,P4 and P5)in the near-Earth plasmasheet.At the mid-to high-latitude nightside,the CARISMA stations located near the foot points of the three probes recorded Pi2s with two periods,about 80 s after the earthward fast flows observed by the P4 probe.The long-period Pi2(140–150 s)belongs to the transient response Pi2(TR Pi2),since the travel time of the Alfvén waves between the plasma sheet and CARISMA stations is very close to half the period of the long-period Pi2.The short-period Pi2(60–80 s)has the same period band as the perpendicular velocity of the fast flows,which indicates that it may relate to the inertial current caused by periodic braking of the earthward fast flows.The 210°MM stations located at the low-latitude duskside also observed Pi2s with the same start time,waveform and frequency,about^120 s after the earthward fast flows.Strong poloidal oscillations are shown by GOES-11(~23 MLT)and the compressional component(Bb)is highly correlated with H components of the 210°MM stations,whereas the other two components(Br and Be)are not.These results confirm that the low-latitude Pi2s are generated by cavity mode resonance,which is driven by an impulsive broadband source in the near-Earth magnetotail. | LUO Hao CHEN GengXiong DU AiMin | 2014 | Science China Earth Sciences2014，57，2： | 5 |
| 3 | Nightside field-aligned current during the April 6,2000 superstorm显示文摘Using the east-west geomagnetic disturbance fields observed from stations at mid-latitudes,we investigate the characteristics of field-aligned currents on the nightside during the April 6,2000 superstorm.The results indicate that there is an eastward disturbance on the nightside of Northern Hemisphere during the main phase of magnetic storm,while the interplanetary magnetic field(IMF)is continued southward.The positive disturbances in the postmidnight are larger than that in the premidnight.This suggests that upward field-aligned currents develop on the nightside,when the IMF is directed southward.The peak of upward fieldaligned currents is located in postmidnight,and it will be more obvious at substorm expansion.We get the conclusion that both partial ring current and region-2 field-aligned current shift to dusk sector.The upward region-2 current is decreased at substorm onset,and intensified after it.We also investigate the relationship between the upward field-aligned currents on the nightside and the auroral electrojets at high latitudes.It shows a good correspondence between region-2 current and the westward electrojet in the postmidnight.We suppose that they are both associated with the convection electric field. | WANG Yuan HONG MingHua CHEN GengXiong XU WenYao DU AiMin ZHAO XuDong LIU XiaoCan LUO Hao | 2010 | Chinese Science Bulletin2010，55，20： | 3 |
| 4 | On the source of the quasi-Carrington Rotation periodic magnetic variations on the Martian surface: InSight observations and modeling显示文摘In a recent paper(Luo H et al.,2022),we found that the peak amplitudes of diurnal magnetic variations,measured during martian days(sols)at the InSight landing site,exhibited quasi Carrington-Rotation(qCR)periods at higher eigenmodes of the natural orthogonal components(NOC);these results were based on~664 sols of magnetic field measurements.However,the source of these periodic variations is still unknown.In this paper we introduce the neutral-wind driven ionospheric dynamo current model(e.g.,Lillis et al.,2019)to investigate the source.Four candidates-the draped IMF,electron density/plasma density,the neutral densities,and the electron temperature in the ionosphere with artificial qCR periodicity,are applied in the modeling to find the main factor likely to be causing the observed surface magnetic field variations that exhibit the same qCR periods.Results show that the electron density/plasma density,which controls the total conductivity in the dynamo region,appears to account for the greatest part of the surface qCR variations;its contribution reaches about 67.6%.The draped IMF,the neutral densities,and the electron temperature account,respectively,for only about 12.9%,10.3%,and 9.2%of the variations.Our study implies that the qCR magnetic variations on the Martian surface are due primarily to variations of the dynamo currents caused by the electron density variations.We suggest also that the timevarying fields with the qCR period could be used to probe the Martian interior's electrical conductivity structure to a depth of at least 700 km. | Hao Luo AiMin Du ShaoHua Zhang YaSong Ge Ying Zhang ShuQuan Sun Lin Zhao Lin Tian SongYan Li | 2022 | Earth and Planetary Physics2022，6，3： | 2 |
| 5 | A CADe system for nodule detection in thoracic CT images based on artificial neural network显示文摘Lung cancer has been the leading cause of cancer-related deaths in 2015 in United States. Early detection of lung nodules will undoubtedly increase the five-year survival rate for lung cancer according to prior studies. In this paper, we propose a novel rating method based on geometrical and statistical features to extract initial nodule candidates and an artificial neural network approach to the detection of lung nodules. The novel method is solely based on 3D distribution of neighboring voxels instead of user-specified features. During initial candidates detection, we combine organized region properties calculated from connected component analysis with corresponding voxel value distributions from statistical analysis to reduce false positives while retaining true nodules. Then we devise multiple artificial neural networks(ANNs) trained from massive voxel neighbor sampling of different types of nodules and organize the outputs using a 3D scoring method to identify final nodules. The experiments on 107 CT cases with 252 nodules in LIDC-IDRI data sets have shown that our new method achieves sensitivity of 89.4% while reducing the false positives to 2.0 per case. Our comprehensive experiments have demonstrated our system would be of great assistance for diagnosis of lung nodules in clinical treatments. | Xinglong LIU Fei HOU Hong QIN Aimin HAO | 2017 | Science China(Information Sciences)2017，60，7： | 2 |
| 6 | Orthodontic simulation system with force feedback for training complete bracket placement procedures显示文摘Background A virtual system that simulates the complete process of orthodontic bracket placement can be used for pre-clinical skill training to help students gain confidence by performing the required tasks on a virtual patient.Methods The hardware for the virtual simulation system is built using two force feedback devices to support bi-manual force feedback operation.A 3D mouse is used to adjust the position of the virtual patient.A multi-threaded computational methodology is adopted to satisfy the requirements of the frame rate.The computation threads mainly consist of the haptic thread running at a frequency of>1000Hz and the graphic thread at>30Hz.The graphic thread allows the graphics engine to effectively display the visual effects of biofilm removal and acid erosion through texture mapping.Using the haptic thread,the physics engine adopts the hierarchy octree collision-detection algorithm to simulate the multi-point and multi-region interaction between the tools and the virtual environment.Its high efficiency guarantees that the time cost can be controlled within 1 ms.The physics engine also performs collision detection between the tools and particles,making it possible to simulate paint and removal of colloids.The surface-contact constraints are defined in the system;this ensures that the bracket will not divorce from or embed into the tooth during the adjustment of the bracket.Therefore,the simulated adjustment is more realistic and natural.Results A virtual system to simulate the complete process of orthodontic bracket bonding was developed.In addition to bracket bonding and adjustment,the system simulates the necessary auxiliary steps such as smearing,acid etching,and washing.Furthermore,the system supports personalized case training.Conclusions The system provides a new method for students to practice orthodontic skills. | Fan YE Luwei LIU Bin YAN Xiaohan ZHAO Aimin HAO | 2021 | Virtual Reality & Intelligent Hardware2021，3，4： | 2 |
| 7 | An efficient resin for solid-phase extraction and determination by UPLCMS/MS of 44 pharmaceutical personal care products in environmental waters显示文摘In this study,a hydrophilic resin named GCHM was fabricated based on poly(N-vinyl pyrrolidone-codivinylbenzene),characterized,and applied as a solid-phase extraction(SPE)material.Up to 44 pharmaceuticals and personal care products(PPCPs)belonging to 10 classes were recovered in environmental water samples.Different variables affecting extraction,such as adsorbent amount,sample pH,and loading speed,were optimized.Under optimal conditions,the average absolute recovgy of 44 PPCPs was 75.6%using GCHM,indicating a better performance than the commercial Oasis^HLB.SPE with home-made hydrophilic polymeric sorbent followed by ultra-performance liquid chromatography and tandem mass spectrometry was validated,and the method achieved good linearity(r2>0.991,for all analytes).In addition,the method detection limits of target compounds ranged from 0.03 to 0.6 ng/L.The developed method was applied to determine PPCPs in 10 environmental water samples taken from the Yangtze River,Huaihe River,and Taihu Lake,1 groundwater sample from Changzhou in Jiangsu Province,1 wastewater sample from Xiamen and 2 seawater samples from the Jiulong River in Fujian Province,China.In these samples,22 compounds were determined at levels ranging from 0.5 to 1590 ng/L. | Feng Zhu Zhijian Yao Wenliang Ji Deye Liu Hao Zhang Aimin Li Zongli Huo Qing Zhou | 2020 | Frontiers of Environmental Science & Engineering2020，14，3： | 1 |
| 8 | Surface modification of steels and magnesium alloy by high current pulsed electron beam显示文摘 | Hao Shengzhi Gao Bo Wu Aimin | 2005 | Nuclear Instruments and Methods in Physics Research B2005，240，： | 1 |
| 9 | Enhancing SAEAs with unevaluated solutions:a case study of relation model for expensive optimization显示文摘Surrogate-assisted evolutionary algorithms(SAEAs)hold significant importance in resolving expensive optimization problems.Extensive efforts have been devoted to improving the efficiency of SAEAs through the development of proficient model-assisted solution selection methods,which,however,first requires generating high-quality solutions.The fundamental paradigm of evaluating a limited number of solutions in each generation within SAEAs reduces the variance of adjacent populations,thereby affecting the quality of offspring solutions.This is a frequently encountered issue yet receives little attention.To address the issue,this paper presents a framework using unevaluated solutions to enhance the efficiency of SAEAs.The surrogate model is employed to identify high-quality solutions for the direct generation of new solutions without evaluation.To ensure dependable selection,we have introduced two tailored relation models to select the optimal solution and the unevaluated population.A comprehensive experimental analysis is performed on two test suites,which showcases the superiority of the relation model over regression and classification models in the solution selection phase.Furthermore,the surrogate-selected unevaluated solutions with high potential have been shown to enhance the efficiency of the algorithm significantly. | Hao HAO Xiaoqun ZHANG Aimin ZHOU | 2024 | Science China(Information Sciences)2024，67，2： | 1 |
| 10 | Influence of the low-frequency source parameters on the plasma characteristics in a dual frequency capacitively coupled plasma reactor:Two dimensional simulations显示文摘A two-dimensional (2D) fluid model is presented to study the discharge of argon in a dual frequency capacitively coupled plasma (CCP) reactor. We are interested in the influence of low-frequency (LF) source parameters such as applied voltage amplitudes and low frequencies on the plasma characteristics. In this paper, the high frequency is set to 60 MHz with voltage 50 V. The simulations were carried out for low frequencies of 1, 2 and 6 MHz with LF voltage 100 V, and for LF voltages of 60, 90 and 120 V with low frequency 2 MHz. The results of 2D distributions of electric field and ion density, the ion flux impinging on the substrate and the ion energy on the powered electrode are shown. As the low frequency increases, two sources become from uncoupling to coupling. When two sources are uncoupling, the increase in LF has little impact on the plasma characteristics, but when two sources are coupling, the increase in LF decreases the uniformities of ion density and ion flux noticeably. It is also found that with the increase in LF voltage, the uniformities in the radial direction of ion density distribution and ion flux at the powered electrode decreases significantly, and the energy of ions bombarding on the powered electrode increases significantly. | Xiang Xu, Hao Ge, Shuai Wang, Zhongling Dai, Younian Wang , Aimin Zhu State Key Lab of Materials Modification by Electron, Ion and Laser Beams, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023, China | 2009 | Progress in Natural Science:Materials International2009，19，6： | 1 |
| 11 | Modeling of mechanical properties of as-cast Mg-Li-Al alloys based on PSO-BP algorithm显示文摘Artificial neural networks have been widely used to predict the mechanical properties of alloys in material research.This study aims to investigate the implicit relationship between the compositions and mechanical properties of as-cast Mg-Li-Al alloys.Based on the experimental collection of the tensile strength and the elongation of representative Mg-Li-Al alloys,a momentum back-propagation(BP)neural network with a single hidden layer was established.Particle swarm optimization(PSO)was applied to optimize the BP model.In the neural network,the input variables were the contents of Mg,Li and Al,and the output variables were the tensile strength and the elongation. The results show that the proposed PSO-BP model can describe the quantitative relationship between the Mg-Li-Al alloy's composition and its mechanical properties.It is possible that the mechanical properties to be predicted without experiment by inputting the alloy composition into the trained network model.The prediction of the influence of Al addition on the mechanical properties of as-cast Mg-Li-Al alloys is consistent with the related research results. | Li Ming Hao Hai Zhang Aimin Song Yingde Liu Zhao Zhang Xingguo | 2012 | China Foundry2012，9，2： | 1 |
| 12 | Personalized cardiovascular intervention simulation system显示文摘Background This study proposes a series of geometry and physics modeling methods for personalized cardiovascular intervention procedures,which can be applied to a virtual endovascular simulator.Methods Based on personalized clinical computed tomography angiography(CTA)data,mesh models of the cardiovascular system were constructed semi-automatically.By coupling 4 D magnetic resonance imaging(MRI)sequences corresponding to a complete cardiac cycle with related physics models,a hybrid kinetic model of the cardiovascular system was built to drive kinematics and dynamics simulation.On that basis,the surgical procedures related to intervention instruments were simulated using specially-designed physics models.These models can be solved in real-time;therefore,the complex interactions between blood vessels and instruments can be well simulated.Additionally,X-ray imaging simulation algorithms and realistic rendering algorithms for virtual intervention scenes are also proposed.In particular,instrument tracking hardware with haptic feedback was developed to serve as the interaction interface of real instruments and the virtual intervention system.Finally,a personalized cardiovascular intervention simulation system was developed by integrating the techniques mentioned above.Results This system supported instant modeling and simulation of personalized clinical data and significantly improved the visual and haptic immersions of vascular intervention simulation.Conclusions It can be used in teaching basic cardiology and effectively satisfying the demands of intervention training,personalized intervention planning,and rehearsing. | Aimin HAO Jiahao CUI Shuai LI Qinping ZHAO | 2020 | Virtual Reality & Intelligent Hardware2020，2，2： | 1 |
| 13 | Engineered high-strength biohydrogel as a multifunctional platform to deliver nucleic acid for ameliorating intervertebral disc degeneration显示文摘Intervertebral disc degeneration(IVDD)is a leading cause of low back pain.The strategy of using functional materials to deliver nucleic acids provides a powerful tool for ameliorating IVDD.However,the immunogenicity of nucleic acid vectors and the poor mechanical properties of functional materials greatly limit their effects.Herein,antagomir-204-3p(AM)shows low immunogenicity and effectively inhibits the apoptosis of nucleus pulposus cells.Moreover,a high-strength biohydrogel based on zinc-oxidized sodium alginate-gelatin(ZOG)is designed as a multifunctional nucleic acid delivery platform.ZOG loaded with AM(ZOGA)exhibits great hygroscopicity,antibacterial activity,biocompatibility,and biodegradability.Moreover,ZOGA can be cross-linked with nucleus pulposus tissue to form a high-strength collagen network that improves the mechanical properties of the intervertebral disc(IVD).In addition,ZOGA provides an advantageous microenvironment for genetic expression in which AM can play an efficient role in maintaining the metabolic balance of the extracellular matrix.The results of the radiological and histological analyses demonstrate that ZOGA restores the height of the IVD,retains moisture in the IVD,and maintains the tissue structure.The ZOGA platform shows the sustained release of nucleic acids and has the potential for application to ameliorate IVDD,opening a path for future studies related to IVD. | Tao Chen Qiuping Qian Pooyan Makvandi Ehsan Nazarzadeh Zare Qizhu Chen Linjie Chen Zhiguang Zhang Hao Zhou Wenxian Zhou Hui Wang Xiangyang Wang Yu Chen Yunlong Zhou Aimin Wu | 2023 | Bioactive Materials2023，，7： | 1 |
| 14 | Hepatoprotective triterpenes from Sedum Sarmentosum 显示文摘 | He Aimin Wang Mingshi Hao Hongyan | 1998 | Phytochemistry1998，49，8： | 1 |
| 15 | Surface modification of steels and magnesium alloy by high current pulsed electron beam显示文摘 | Shengzhi Hao Bo Gao Aimin Wu Jianxin Zou Ying Qin Chuang Dong Jian An Qingfeng Guan | 2005 | Nuclear Inst and Methods in Physics Research B2005，，3： | 1 |
| 16 | Temperature–stress fields and related phenomena induced by a high current pulsed electron beam显示文摘 | Ying Qin Jianxin Zou Chuang Dong Xiaogang Wang Aimin Wu Yue Liu Shengzhi Hao Qingfeng Guan | 2004 | Nuclear Inst and Methods in Physics Research B2004，，4： | 1 |
| 17 | S-O bond chemically constrained NiS2/rGO nanocomposite with enhanced Na-ion storage capacity显示文摘NiS2 has become a research hotspot of anode materials for Na-ion batteries due to its high theoretical specific capacity.However,the volume effect,the dissolution of polysulfide intermediates and the low conductivity during the charge/discharge process lead to the low specific capacity and poor cycling stability.NiS2/rGO nanocomposite was prepared by a facile two-step process:GO was prepared by modified Hummers method,and then NiS2/rGO nanocomposite was synthesized by L-cys assisted hydrothermal method.NiS2/rGO nanocomposite shows excellent cycle performance and rate performance,which could be attributed to the mesoporous structure on the graphene skeleton with high conductivity.Besides,the chemical constraint of a unique S—O bond on NiS2 could inhibit the dissolution of intermediates and the loss of irreversible capacity. | Shuyu Zhou Xiaozhe Jin Shengming Zhu Qian Luo Zhiwen Qiu Aimin Wu Hao Huang | 2020 | Chinese Chemical Letters2020，31，9： | 1 |
| 18 | First-Principle Investigations of Structural Stability of Beryllium under High Pressure显示文摘 | HAO Aimin ZHU Yan | 2012 | J Appl Phys2012，112，02： | 1 |
| 19 | Surface treatment of aluminum by high current pulsed electron beam显示文摘 | Hao Shengzhi Yao Shan Guan Jiong Wu Aimin Zhong Pu Dong Chuang | 2001 | Current Applied Physics2001，1，： | 1 |
| 20 | Haptics-equiped interactive PCI simulation for patient-specific surgery training and rehearsing显示文摘Despite the long history of medical simulations, suffering from the patient-specific heterogeneous heart physiological structure and complex intravascular procedures, it is still challenging for patient-specific percutaneous coronary intervention(PCI) surgery simulation. In this paper, we advocate a haptics-equiped interactive prototype system towards PCI surgeons training and patient-specific surgery rehearsing, which can afford trainees the opportunity to approximately experience the entire PCI procedures and customized emergency cases that might occur in common clinical settings. The full simulation covers tissue deformation, catheter and wire simulation, X-ray simulation, haptic feedback, and 3D realistic rendering, which in all give rise to the integrated physical, visual, haptic, and procedural realism. Our system can accommodate various comprehensive operations involved in PCI-related procedures, including feeding wires, releasing stents, injecting contrast medium, simulating X-ray, bleeding, etc. Moreover, our system framework is fully built upon CUDA, and thus can achieve real-time performance even on a common desktop. The high-fidelity, real-time efficiency and stableness of our system show great potentials for its practical applications in clinical training fields. | Shuai LI Qing XIA Aimin HAO Hong QIN Qinping ZHAO | 2016 | Science China(Information Sciences)2016，59，10： | 1 |
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