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Springback Prediction and Optimization of Variable Stretch Force Trajectory in Three-dimensional Stretch Bending Process

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Chinese Journal of Mechanical Engineering 2015年第6期28卷 1132-1140页

作者： TENG Fei ZHANG Wanxi liang Jicai GAO song State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology School of Automotive Engineering Dalian University of Technology

Most of the existing studies use constant force to reduce springback while researching stretch force. However, variable stretch force can reduce springback more efficiently. The current research on springback prediction in stretch bending forming mainly focuses on artificial neural networks combined with the finite element simulation. There is a lack of springback prediction by support vector regression（SVR）. In this paper, SVR is applied to predict springback in the three-dimensional stretch bending forming process, and variable stretch force trajectory is optimized. Six parameters of variable stretch force trajectory are chosen as the input parameters of the SVR model. Sixty experiments generated by design of experiments（DOE） are carried out to train and test the SVR model. The experimental results confirm that the accuracy of the SVR model is higher than that of artificial neural networks. Based on this model, an optimization algorithm of variable stretch force trajectory using particle swarm optimization（PSO） is proposed. The springback amount is used as the objective function. Changes of local thickness are applied as the criterion of forming constraints. The objection and constraints are formulated by response surface models. The precision of response surface models is examined. Six different stretch force trajectories are employed to certify springback reduction in the optimum stretch force trajectory, which can efficiently reduce springback. This research proposes a new method of springback prediction using SVR and optimizes variable stretch force trajectory to reduce springback.

关键词： springback prediction support vector regression(SVR) response surface particle swarm optimization(PSO)

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SPECTROPHOTOMETRIC　DETERMINATION　OF　CATIONIC　SURFACTANTS　BASED　ON　IRON（III）－CHROME　AZUROL　S　COMPLEX

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Chinese Chemical Letters 1995年第11期6卷 979-982页

作者： song, M liang, SQ Chinese Acad Sci Inst Chem Beijing 100080 Peoples R China

An extraction-free spectrophotometric method for the determination of cationic surfactants is proposed,which is based on the formation of ternary complexes with Fe(III) and chrome azurol *** method gives an apparent molar absorptivity of 6.5×104 L mol-1 cm-1 and linear range of (0.1 -6.0)×10-6 mol/L cationic surfactants, and has been successfully applied to determining cationic surfactants in water.

关键词： III IRON CHROME AZUROL BASED

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Drilling Combined with Adipose-derived Stem Cells and Bone Morphogenetic Protein-2 to Treat Femoral Head Epiphyseal Necrosis in Juvenile Rabbits

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Current Medical Science 2018年第2期38卷 277-288页

作者： zi-li WANG Rong-zhen HE Bin TU Jin-shen HE Xu CAO Han-song XIA Hong-liang BA song WU Cheng PENG Kun XIONG Department of Orthopedic Surgery Third Xiangya Hospital of Central South University Changsha 410013 China Department of Orthopaedics Leping City People's Hospital Leping 333399 China Department of Plastic Surgery Third Xiangya Hospital of Central South University Changsha 410013 China Department of Anatomy and Neurobiology School of Basic Medical Sciences Central South University Changsha 410013 China

This study was designed to evaluate the effects of drilling through the growth plate and using adipose-derived stem cells （ADSCs） and bone morphogenetic protein-2 （BMP-2） to treat femoral head epiphyseal ischemic necrosis, which can be done in juvenile rabbits. Passagefour bromodeoxyuridine （BrdU）-labeled ADSCs were cultured, assayed with MTT to determine their viability and stained with alizarin red dye to determine their osteogenic ability. Twomonth-old, healthy male rabbits （1.2 to 1.4 kg, n=45） underwent ischemic induction and were randomly divided into five groups （group A： animal model control; group B： drilling; group C： drilling ＆ ADSCs; group D： drilling ＆ BMP-2; and group E： drilling ＆ ADSCs ＆ BMP-2）. Magnetic resonance imaging （MRI）, X-ray imaging, hematoxylin and eosin staining and BrdU immunofluorescence detection were applied 4, 6 and 10 weeks after treatment. Approximately 90% of the ADSCs were labeled with BrdU and showed good viability and osteogenic ability. Similar results were observed in the rabbits in groups C and E at weeks 6 and 10. The animals of groups C and E demonstrated normal hip structure and improved femoral epiphyseal quotients and trabecular areas compared with those of the groups A and B （P〈0.01）. Group D demonstrated improved femoral epiphyseal quotients and trabecular areas compared with those of groups A and B （P〈0.05）. In summary, drilling through the growth plate combined with ADSC and BMP-2 treatments induced new bone formation and protected the femoral head epiphysis from collapsing in a juvenile rabbit model of femoral head epiphyseal ischemic necrosis.

关键词： adipose-derived stem cells bone morphogenetic protein-2 bone regeneration drilling Perthes' disease

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Dynamical Interaction Between Information and Disease Spreading in Populations of Moving Agents

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Computers, Materials & Continua 2018年第10期57卷 123-144页

作者： Lingling Xia Bo song Zhengjun Jing Yurong song liang Zhang Department of Computer Information and Cyber Security Jiangsu Police InstituteNanjing210031China College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing210003China Global Big Data Technologies Centre University of Technology SydneySydney2007Australia College of Computer Engineering Jiangsu University of TechnologyChangzhou213001China College of Automation Nanjing University of Posts and TelecommunicationsNanjing210003China

Considering dynamical disease spreading network consisting of moving individuals,a new double-layer network is constructed,one where the information dissemination process takes place and the other where the dynamics of disease spreading *** the basis of Markov chains theory,a new model characterizing the coupled dynamics between information dissemination and disease spreading in populations of moving agents is established and corresponding state probability equations are formulated to describe the probability in each state of every node at each *** Carlo simulations are performed to characterize the interaction process between information and disease spreading and investigate factors that influence spreading *** results show that the increasing of information transmission rate can reduce the scale of disease spreading in some *** infection period and strengthening consciousness for self-protection by decreasing individual’s scope of activity both can effectively reduce the final refractory density for the disease but have less effect on the information *** addition,the increasing of vaccination rate or decreasing of long-range travel can also reduce the scale of disease spreading.

关键词： Complex networks Markov chains theory interaction process spreading dynamics double-layer network

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An Aerial Target Recognition Algorithm Based on Self-Attention and LSTM

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Computers, Materials & Continua 2024年第10期81卷 1101-1121页

作者： Futai liang Xin Chen song He zihao song Hao Lu Department of Intelligence Early Warning AcademyWuhan430019China 31121 PLA Troops Nanjing210000China Information Technology Room Early Warning AcademyWuhan430019China

In the application of aerial target recognition,on the one hand,the recognition error produced by the single measurement of the sensor is relatively large due to the impact of *** the other hand,it is difficult to apply machine learning methods to improve the intelligence and recognition effect due to few or no actual measurement *** at these problems,an aerial target recognition algorithm based on self-attention and Long Short-Term Memory Network(LSTM)is *** can effectively extract temporal *** attention mechanism calculates the weight of each input element and applies the weight to the hidden state of the LSTM,thereby adjusting the LSTM’s attention to the *** combination retains the learning ability of LSTM and introduces the advantages of the attention mechanism,making the model have stronger feature extraction ability and adaptability when processing sequence *** addition,based on the prior information of the multidimensional characteristics of the target,the three-point estimation method is adopted to simulate an aerial target recognition dataset to train the recognition *** experimental results show that the proposed algorithm achieves more than 91%recognition accuracy,lower false alarm rate and higher robustness compared with the multi-attribute decision-making(MADM)based on fuzzy numbers.

关键词： Aerial target recognition long short-term memory network self-attention three-point estimation

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Multilevel analysis of the central-peripheral-target organ pathway:contributing to recovery after peripheral nerve injury

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Neural Regeneration Research 2025年第10期20卷 2807-2822页

作者： Xizi song Ruixin Li Xiaolei Chu Qi Li Ruihua Li Qingwen Li Kai-Yu Tong Xiaosong Gu Dong Ming Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Haihe Laboratory of Brain-Machine Interface and Human-Machine Fusion TianjinChina Department of Rehabilitation Tianjin University Tianjin HospitalTianjinChina Department of Hand Microsurgery Tianjin University Tianjin HospitalTianjinChina School of Exercise and Health Tianjin University of SportTianjinChina Department of Biomedical Engineering the Chinese University of Hong KongHong Kong Special Administrative RegionChina

Peripheral nerve injury is a common neurological condition that often leads to severe functional limitations and *** on the pathogenesis of peripheral nerve injury has focused on pathological changes at individual injury sites,neglecting multilevel pathological analysis of the overall nervous system and target *** has led to restrictions on current therapeutic *** this paper,we first summarize the potential mechanisms of peripheral nerve injury from a holistic perspective,covering the central nervous system,peripheral nervous system,and target *** peripheral nerve injury,the cortical plasticity of the brain is altered due to damage to and regeneration of peripheral nerves;changes such as neuronal apoptosis and axonal demyelination occur in the spinal *** nerve will undergo axonal regeneration,activation of Schwann cells,inflammatory response,and vascular system regeneration at the injury *** damage to target organs can occur,including skeletal muscle atrophy and sensory receptor *** then provide a brief review of the research advances in therapeutic approaches to peripheral nerve *** main current treatments are conducted passively and include physical factor rehabilitation,pharmacological treatments,cell-based therapies,and physical ***,most treatments only partially address the problem and cannot complete the systematic recovery of the entire central nervous system-peripheral nervous system-target organ ***,we should further explore multilevel treatment options that produce effective,long-lasting results,perhaps requiring a combination of passive(traditional)and active(novel)treatment methods to stimulate rehabilitation at the central-peripheral-target organ levels to achieve better functional recovery.

关键词： central nervous system central peripheral target organ multilevel pathological analysis nerve regeneration peripheral nerve injury peripheral nervous system target organs therapeutic approach

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Carbon-supported CeNCl as an efficient catalyst for CO_(2)cycloaddition

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Nano Research 2025年第1期18卷 157-163页

作者： Li Liu Lingling Zhang Xiang Chu Baokang Geng Huilin Wang Zongxiang Li Xiao Wang Shuyan song Hongjie Zhang School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Sinocare Incorporation Changsha 410221China Department of Chemistry Tsinghua UniversityBeijing 100084China

The cycloaddition reaction of CO_(2)with epoxide not only effectively reduces the concentration of CO_(2)in the atmosphere,but also has excellent industrial application value and up to 100%atom utilization,but there are difficulties in separation and recovery of traditional homogeneous catalysts,harsh reaction conditions of traditional heterogeneous catalysts,and activation of CO_(2)*** this paper,an easily synthesized heterogeneous catalyst CeNCl/C was used to catalyze the cycloaddition reaction of CO_(2)with styrene oxide,with a high yield of 92.7%,a high selectivity of 96.7%,a turnover numbers(TON)value of 349,and a good stability demonstrated in six cycle tests(equivalent to 216 h of testing).Through comprehensive studies,it was shown that CeNCl/C contains Lewis acid-base centers as active centers,which can effectively reduce the energy barrier required for ring opening of the reaction substrate,enhance the adsorption and activation of CO_(2),and promote the formation of intermediates,which led to the acquisition of excellent catalytic activity.

关键词： CO_(2)cycloaddition heterogeneous catalysis CeNCl Lewis acid/base

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Stereotactic multi-target limbic leucotomy for treating intractable psychiatric disease in 30 patients Three-year follow-up of memory, intelligence, and psychiatric symptoms

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Neural Regeneration Research 2008年第1期3卷 104-108页

作者： Jian song Zheng Wang Qiang liang Department of Neurosurgery First Hospital Hebei Medical University Shijiazhuang 050031 Hebei Province China

BACKGROUND： The biochemical hypothesis of dopamine hyperfunction in the brain can explain the pathological mechanisms of schizophrenia. Surgery is performed based on limbic system circuit theory correspondence to above-mentioned hypothesis. Stereotactic surgery for the treatment of mental disorders is related to stereotactic surgery that influences the Papez circuit. OBJECTIVE： To observe the effects of stereotactic multi-target limbic leucotomy on the improvements in memory, intelligence and psychiatric symptoms in the treatment of intractable psychiatric disease. DESIGN： Self-control case analysis and follow-up of therapeutic effects. SETTING： Department of Neurosurgery, First Hospital, Hebei Medical University. PARTICIPANTS： Thirty patients with intractable psychiatric disease, who received stereotactic surgery in the Department of Neurosurgery, First Hospital, Hebei Medical University between July 2002 and August 2005, were included in this study. The patients, 21 males and 9 females, all met the diagnostic criteria of intractable psychiatric disease, determined by the national psychosurgery cooperation team in 1998. Informed consents for surgery and clinical follow-up exams were obtained from patients and/or patients＇ relatives （guardians）. METHODS： In 30 patients with intractable psychiatric disease, limbic leucotomy was performed by stereotactic technique. Multi-target radiofrequency hyperthermia was performed in the intracranial amygdaloid nucleus, anterior limb of internal capsule, callosal gyrus, among other regions. The therapeutic effects of patients were evaluated by Brief Psychiatric Rating Scale （BPRS） before surgery, and 6 months, 1, and 3 years after surgery. The Wechsler Adult Intelligence Scale （WAIS） and Clinical Memory Scale （CMS） were used to assess memory and intelligence before and after surgery. MAIN OUTCOME MEASURES： Memory, intelligence, and psychiatric symptoms of patients before and after operation. RESULTS： Thirty patients were included

关键词： stereotactic surgery limbic leucotomy intractable psychiatric disease

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Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry

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Journal of Energy Chemistry 2025年第1期100卷 192-200页

作者： Hua Gao Yunfeng Zhang Menglei Wang Ruoxuan Yang Shuai Feng Xuan Cao Yaping Zhang Zhongyuan Lu Yingze song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology School of Material Science and Engineering Henan University of Technology College of Chemistry and Chemical Engineering Taishan University

Lithium-sulfur （Li-S） batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy ***,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of Li-S *** rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be ***,a universal synthetic strategy to construct a series of three-dimensional （3D） porous graphene-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating the Li-S redox *** has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical *** Li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,the soft-packaged Li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g-1and guarantees for the continuous 30 min work of fan *** investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable Li-S batteries.

关键词： Lithium-sulfur battery Universal synthesis 3D graphene-iron based promotor Electrocatalysis

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A 10-kHz 12–16-bit reconfigurable zoom ADC with pole optimization technique and floating current-starved amplifier

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Science China(Information Sciences) 2024年第12期67卷 341-342页

作者： Zhangming ZHU Jiajun song Yuhua liang Key Laboratory of Analog Integrated Circuits and Systems (Ministry of Education) School of Integrated CircuitsXidian University

Recently, zoom analog-to-digital converters(ADCs) have been shown to be well-suited for reconfigurable ADCs. They achieve high resolution and high energy efficiency by combining the advantages of the successive approx...

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