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Nano Research 2024年第9期17卷 8200-8208页

作者： Xiang cheng teng chen De Gong Pengcheng Ma Bo chen Jun Cai Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100190China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Beijing U-Precision Tech Co. Ltd.Beijing 100176China University of Chinese Academy of Sciences Beijing 100049China

Fabric-based composites with superior mechanical properties and excellent perceptive function are highly ***,it remains a huge challenge to attain structure-function integration,especially for hybrid fabric ***,a skin-inspired interface modification strategy is proposed toward this target by constructing a hybrid smart fabric system consisting of two types of smart fabrics:carbon nanotube(CNT)/MXene-modified aramid fabrics and zinc oxide nanorod(ZnO NR)-modified carbon *** on that,flexible piezoelectric pressure sensors with skin-like hierarchical perception interfaces are fabricated,which demonstrate superb sensitivity of 2.39 V·kPa^(-1)and are capable of various wearable monitoring ***,the interface-modified hybrid fabric reinforced plastics can also be fabricated,which are proven to possess 13.6%higher tensile strength,10.1%elastic *** impressively,their average energy absorption can be improved by 111.9%,accompanied with inherent damage alert *** offers a paradigm to fabricate structure-function integrated hybrid smart fabric composites for the smart clothing and intelligent aerial vehicles.

关键词： hybrid fabrics interface modification piezoelectric pressure sensors self-diagnostic composites structure-function integration

Recent progress on transition metal oxides and carbon-supported transition metal oxides as catalysts for thermal decomposition of ammonium perchlorate

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Defence Technology（防务技术） 2021年第4期17卷 1471-1485页

作者： teng chen Yi-wen Hu Cai Zhang Zhao-jian Gao School of Material and Chemical Engineering Xuzhou University of TechnologyXuzhouJiangsuPR China Xi’an Modern Chemistry Research Institute Xi’anShaanxiPR China Xuzhou University of Technology XuzhouJiangsuPR China

As a main oxidizer in solid composite propellants,ammonium perchlorate(AP)plays an important role because its thermal decomposition behavior has a direct influence on the characteristic of solid composite *** improve the performance of solid composite propellant,it is necessary to take measures to modify the thermal decomposition behavior of *** recent years,transition metal oxides and carbon-supported transition metal oxides have drawn considerable attention due to their extraordinary catalytic *** this review,we highlight strategies to enhance the thermal decomposition of AP by tuning morphology,varying the types of metal ion,and coupling with carbon *** enhanced catalytic performance can be ascribed to synergistic effect,increased surface area,more exposed active sites,and accelerated electron transportation and so *** mechanism of AP decomposition mixed with catalyst has also been briefly ***,a conclusive outlook and possible research directions are suggested to address challenges such as lacking practical application in actual formulation of solid composite propellant and batch manufacturing.

关键词： Transition metal oxides Carbon-supported transition metal oxides Catalyst Ammonium perchlorate Thermal decomposition

Electrochemical deposition of Nd and Nd-Fe alloy from Cu6Nd alloy in a NaCl-KCl-NdCl3 melt

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1650-1656页

作者： chen-teng Sun Qian Xu Yan-ping Xiao Yong-xiang Yang State Key Laboratory of Advanced Special Steel School of Material Science and EngineeringShanghai UniversityShanghai 200072China Department of Materials Science and Engineering Delft University of TechnologyDelft 2628 CDThe Netherlands Department of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243002China

Electrorefining effectively separates metals from their corresponding *** obtain Nd from Cu6 Nd alloy,cyclic voltammetry and square wave voltammetry were used to investigate the reduction behavior of Nd^(3+) and the anode dissolution behavior of Cu6 Nd in the Na Cl-KCl-0.5 mol%Nd Cl3 melt at 1023 *** to the analysis of the electrochemical behavior,the cell voltage was determined to be between 0.3 and 1.2 V for separating Nd from Cu6 *** electrolysis at 0.6 V for 4 h,the Nd was found at the surface of the Mo cathode without any *** the Fe cathode,a deposition with an atom ratio of Nd:Fe=1:1 was formed on the ***,the low current density of separation remains a great experimental challenge that must be solved.

关键词： Cu6Nd alloy molten salt electrochemical separation NaCl-KCl-NdCl3

A Trot and Flying Trot Control Method for Quadruped Robot Based on Optimal Foot Force Distribution

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Journal of Bionic Engineering 2019年第4期16卷 621-632页

作者： teng chen Xiaobo Sun Ze Xu Yibin Li Xuewen Rong Lelai Zhou Center for Robotics School of Control Science and EngineeringShandong UniversityJinan 250061China

In order to enhance the dynamic motion capability of the bionic quadruped robot,a flying trot gait control method based on full-scale virtual model and optimal plantar force distribution is proposed.A stable flying trot gait is accomplished by mapping the robot torso motion to the foot *** force distribution calculated by the torso virtual model is converted into a quadratic optimization problem and solved in real time by the open source library *** transition between the trot gait and the flying trot gait is achieved by coordinating leg motion *** results of the dynamic simulation verify that the proposed method can realize the 3D stable flying trot *** against the trot gait,the flying trot gait can improve the speed of the quadruped *** the trot gait and the flying trot gait,the quadruped robot can move efficiently and adapt to complex terrains.

关键词： quadruped robot flying trot virtual model control quadratic optimization

Recent Progresses in the Investigation of Rare-earth Boron Inverse Sandwich Clusters

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Chinese Journal of Structural Chemistry 2020年第6期39卷 1009-1018页

作者： LI Wan-Lu chen teng-teng JIANG Zhi-Yu WANG Lai-Sheng LI Jun Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing 100084China Department of Chemistry Brown UniversityProvidenceRhode Island 02912US Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

While rare-earth borides represent a class of important materials in modern industries,there are few fundamental researches on their electronic structures and physicochemical ***,we have performed combined experimental and theoretical studies on rare-earth boron clusters and their cluster-assembled complexes,revealing a series of rare-earth inverse sandwich clusters with fascinating electronic structures and chemical bonding *** this overview article,we summarize recent progresses in this area and provide a perspective view on the future development of rare-earth boride *** the electronic structures of these clusters helps to design materials of f-element(lanthanide and actinide)borides with critical physiochemical properties.

关键词： rare-earth boron clusters inverse sandwich cluster compounds f-element boride bonding of rare-earth compounds

Can canines alone be used for age estimation in Chinese individuals when applying the Kvaal method?

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Forensic Sciences Research 2022年第2期7卷 132-137页

作者： Mujia Li Jiamin Zhao Wenjie chen Xin chen Guang Chu teng chen Yucheng Guo Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’anChina Department of Orthodontics Stomatological Hospital of Xi’an Jiaotong UniversityXi’anChina College of Medicine and Forensics Xi’an Jiaotong University Health Science CenterXi’anChina

Due to the secondary dentin formation,the dental pulp undergoes changes in shape throughout *** on this phenomenon,the Kvaal method has been applied to various populations for age estimation,and its usefulness has been *** applying the Kvaal method to Chinese subjects,we observed a relatively strong correlation between mandibular canines and *** study notes the correlation between canines and chronological age and is the first to identify which canine is most closely related to chronological *** addition,a new,simpler formula is determined based on canines according to Kvaal’s *** radiographs of 360 individuals from northern China were selected,from which the widths and lengths of the pulp from four canines were measured according to the Kvaal ***,inter-and intra-observer reliabilities were analyzed in order to assess the repeatability of these *** correlation between measurements and age was examined,and Chinese-specific age estimation formulae were *** results revealed that the ratios from the left maxillary canine exhibited the strongest correlation with age compared to the other canines,whereas the left mandibular canine showed the weakest correlation,which may contribute to the overall poor correlation of mandibular canines with ***’s more,the formula derived from the left maxillary canine in this study displayed the highest coefficients of determination,and the formula derived from all canines showed the lowest *** of these formulae performed better than the Chinese-specific formula derived from six different types of teeth in our previous study,which had formerly possessed the highest coefficients of determination and the lowest ***,we concluded that canines do play an important role in age estimation in the Chinese population,and the correlation between maxillary canines and chronological age is stronger than that of mandibular canines,although no distinct trend as t

关键词： Forensic sciences forensic odontology age estimation canine secondary dentine Kvaal method Chinese subjects

Efficient Dynamic Locomotion of Quadruped Robot via Adaptive Diagonal Gait

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Journal of Bionic Engineering 2024年第1期21卷 126-136页

作者： Jian Bi teng chen Xuewen Rong Guoteng Zhang Guanglin Lu Jingxuan Cao Han Jiang Yibin Li The Center for Robotics School of Control Science and EngineeringShandong UniversityJi Nan 250000China

Quadruped animals in the nature realize high energy efficiency locomotion by automatically changing their gait at different *** by this character,an efficient adaptive diagonal gait locomotion controller is designed for quadruped robot.A unique gait planning method is proposed in this *** the speed of robot varies,the gait cycle time and the proportion of stance and swing phase of each leg are adjusted to form a variety of *** optimal joint torque is calculated by the controller combined with Virtual Model Control(VMC)and Whole-Body Control(WBC)to realize the desired *** gait and step frequency of the robot can automatically adapt to the change of *** experiments are done with a quadruped robot made by our laboratory to verify that the gait can change automatically from slow-trotting to flying-trot during the period when speed is from 0 to 4 m/*** ratio of swing phase is from less than 0.5 to more than 0.5 to realize the running motion with four feet off the *** have shown that the controller can indeed consume less energy when robot runs at a wide range of speeds comparing to the basic controller.

关键词： Quadruped robot Gait transition Adaptive gait Energy efficiency

Hepatic hemodynamic changes during liver transplantation: A review

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World Journal of Gastroenterology 2014年第32期20卷 11131-11141页

作者： An-Chieh Feng Hsiu-Lung Fan teng-Wei chen Chung-Bao Hsieh Division of General Surgery Department of SurgeryTri-Service General Hospital National Defense Medical Center Neihu

Liver transplantation is performed in the recent decades with great improvements not only technically but also conceptually. However, there is still lack of consensus about the optimal hemodynamic characteristics during liver transplantation. The representative hemodynamic parameters include portal vein pressure, portal vein flow, and hepatic venous pressure gradient; however, there are still others potential valuable parameters, such as total liver inflow and hepatic artery flow. All the parameters are correlated closely and some internal modulating mechanisms, like hepatic arterial buffer response, occur to maintain stable hepatic inflow. To distinguish the unique importance of each hepatic and systemic parameter in different states during liver transplantation, we reviewed the published data and also conducted two transplant cases with different surgical strategies applied to achieve ideal portal inflow and pressure.

关键词： Liver transplantation Hemodynamics Graft inflow modulation Liver circulation Small-for-size syndrome

Nest-type NCM ■ Pt/C with oxygen capture character as advanced electrocatalyst for oxygen reduction reaction

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Journal of Energy Chemistry 2022年第8期31卷 304-312,I0009页

作者： teng chen Yida Xu Deming Meng Xuefeng Guo Yan Zhu Luming Peng Jianqiang Hu Weiping Ding Key Lab of Mesoscopic Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023JiangsuChina Department of Aviation Oil and Material Air Force Logistics AcademyXuzhou 221000Jiangsu.China

A unique nest-type catalyst has been designed with a nest of oxygen capture surrounding catalytic Pt centers, which shows much promoted performance, on the base of Pt/C catalyst, for oxygen reduction reaction(ORR). The nest is constructed with nitrogen-doped carbon matrix(NCM), derived from the controlled carbonization of PANI precursor, to cover Pt/C catalyst. The unique structure of the catalyst(denoted as NCM■ Pt/C) has many merits. Firstly, it can capture oxygen both in air and in acidic electrolyte. Compared with naked Pt/C, it is found that, in air, the oxygen concentration within the porous nest of NCM surrounding Pt/C particles is ~13 times higher than atmospheric oxygen concentration and, in acidic electrolyte, the concentration of activated oxygen over the catalyst NCM■ Pt/C rise to~1.9 times. Secondly, the NCM nest offers a special electronic modulation on Pt centers toward modified ORR kinetics and then catalytic performances. With these merits, compared with Pt/C, the NCM■ Pt/C catalyst shows 3.2 times higher turnover frequency value and 2.9 times enhanced specific activity for ORR with half-wave potential at 0.894 V. After 50,000 sweeping cycles, the NCM■ Pt/C catalyst retains~66% mass activity and still has advantages over the fresh Pt/C catalyst. We envision that the nest-type catalyst provides a new idea for progress of practical Pt/C ORR catalyst.

关键词： Oxygen reduction reaction Surrounding environment Nest-type catalyst Oxygen capture Electronic modulation

Preparation and property of CL-20/BAMO-THF energetic nanocomposites

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Defence Technology（防务技术） 2019年第3期15卷 306-312页

作者： teng chen Yan Zhang Shuang-feng Guo Liu-ming Zhao Wei chen Ga-zi Hao Lei Xiao Xiang Ke Wei Jiang National Special Superfine Powder Engineering Research Center of China School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 PR China Xi'an Modern Chemistry Research Institute Shaanxi 710065 PR China

A sol-gel freezing-drying method was utilized to prepare energetic nanocomposites based on 2, 4, 6, 8,10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane(CL-20) with 3, 3-Bis(azidomethyl) oxetanetetrahydrofuran copolymer(BAMO-THF) as energetic gel matrix. Scanning electron microscopy(SEM),X-ray diffraction(XRD), Raman, Fourier-transform infrared spectroscopy(FT-IR) and differential thermal analyser(DTA) were utilized to characterize the structure and property of the resultant energetic nanocomposites. Compared with raw CL-20, the average particle sizes of CL-20 in CL-20/BAMO-THF energetic nanocomposites were decreased to nano scale and the morphologies of CL-20 were also changed from prismatic to spherical. FT-IR detection revealed that CL-20 particles were recrystallized in BAMO-THF gel matrix during the freezing-drying process. The thermal decomposition behaviors of the energetic nanocomposites were investigated as well. The thermolysis process of CL-20/BAMO-THF nanocomposites was enhanced and the activation energy was lower compared with that of raw CL-20,indicating that CL-20/BAMO-THF nanocomposites showed high thermolysis activity. The impact sensitivity tests indicated that CL-20/BAMO-THF energetic nanocomposites presented low sensitivity performance.

关键词： CL-20/BAMO-THF nanocomposites Kinetic Thermodynamic Impact sensitivity