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| 1 | Early warning for geo-hazards based on the weather condition in China显示文摘According to national early warning practice for geo-hazards from 2003 to 2005,it is systematically concluded that the basic characteristics of geo-hazards,early warning method and forecast result based on the geological maps of China in a scale 1∶6 000 000.With the contrast of different characters between sustained rainfall and typhoon rainfall inducing geo-hazards,the disaster reduction result and some problems are preliminarily analyzed.Some basic recognition is that early warning to geo-hazards is feasible,national scale forecast is only to call attention,but can't immediately be used to disaster reduction decision-making.And,the future direction is to build a united disaster reduction framework of early warning system including national,provincial and county levels based on weather factors in different scale of area. | Chuanzheng LIU Yanhui LIU Mingsheng WEN Can TANG Tiefeng LI Jianfa LIAN | 2006 | Global Geology2006，9，2： | 9 |
| 2 | Electro-mechanically controlled assembly of reconfigurable 3D mesostructures and electronic devices based on dielectric elastomer platforms显示文摘The manufacture of 3D mesostructures is receiving rapidly increasing attention,because of the fundamental significance and practical applications across wide-ranging areas.The recently developed approach of buckling-guided assembly allows deterministic formation of complex 3D mesostructures in a broad set of functional materials;with feature sizes spanning nanoscale to centimeter-scale.Previous studies mostly exploited mechanically controlled assembly platforms using elastomer substrates;which limits the capabilities to achieve on-demand local assembly;and to reshape assembled mesostructures into distinct 3D configurations.This work introduces a set of design concepts and assembly strategies to utilize dielectric elastomer actuators as powerful platforms for the electro-mechanically controlled 3D assembly.Capabilities of sequential-local loading with desired strain distributions allow access to precisely tailored 3D mesostructures that can be reshaped into distinct geometries,as demonstrated by experimental and theoretical studies of?30 examples.A reconfigurable inductive-capacitive radio-frequency circuit consisting of morphable 3D capacitors serves as an application example. | Wenbo Pang Xu Cheng Haojie Zhao Xiaogang Guo Ziyao Ji Guorui Li Yiming Liang Zhaoguo Xue Honglie Song Fan Zhang Zheng Xu Lei Sang Wen Huang Tiefeng Li Yihui Zhang | 2020 | National Science Review2020，7，2： | 8 |
| 3 | Highly stable lead-free Cs3Bi2I9 perovskite nanoplates for photodetection applications显示文摘Lead halide perovskites have received tremendous attentions recently for their excellent properties such as high light absorption coefficient and long charge carrier diffusion length. However, the stability issues and the existence of toxic lead cations have largely limited their applications in optoelectronic area. Herein, we report the synthesis and investigation of highly stable and lead-free Cs3Bi2I9 perovskite nanoplates for visible light photodetection applications. The Cs3Bi2I9 nanoplates were synthesized through a facile solution-processed method, which is also applicable to various substrates. The achieved nanoplates present very good crystal quality and exhibit excellent long-term stability even exposed in moist air for several months. Photodetectors were constructed based on these high-quality perovskite nanoplates for the first time, and display a maximum photoresponsivity of 33.1 mA/W under the illumination of 450 nm laser, which is six times higher than the solution-synthesized CH3NH3PbI3 nanowire photodetectors. The specific detectivity of these devices can reach up to 10^10 Jones. Additionally, the devices exhibit fast rise and decay time of 10.2 and 37.2 ms, respectively, and highly stable photoswitching behavior with their photoresponse well retaining under alternating light and darkness. This work opens up a new opportunity for stable and low-toxic perovskite-based optoelectronic applications. | Zhaoyang Qi Xianwei Fu Tiefeng Yang Dong Li Peng Fan Honglai Li Feng Jiang Lihui Li Ziyu Luo Xiujuan Zhuang Anlian Pan | 2019 | Nano Research2019，12，8： | 7 |
| 4 | Fractal desulfurization kinetics of high-sulfur coal显示文摘The pore structure characteristics of high-sulfur coal from Wansheng in Chongqing have been studied by a nitrogen adsorption method (BET). The effects of grinding and pre-treating with nitric acid on the inorganic sulfur content of coal have been investigated. Organic sulfur in coal pretreated with nitric acid was desulfurized by using propylene-glycol-KOH (PG-KOH). Fractal kinetic properties of these two desulfurization procedures were investigated by using fractal geometric theory. The results show that both the specific surface area and pore volume increased with the decrease in particle diameter. The microspore surface of coal had fractal characteristics; the fractal dimension was 2.48. The sulfur content decreased with the decrease in particle diameter by grinding. After pretreatment with nitric acid, the desulfurization ratio (DFR) of inorganic sulfur increased to over 99% and the DFR of total sulfur to over 70%. The desulfurization procedure of inorganic sulfur had fractal kinetic characteristics; its reactive fractal dimension was 2.94. The organic sulfur desulfurization procedure by PG-KOH was also tallied with fractal kinetic properties; the reactive fractal dimension was 2.57. The effect of temperature on the desulfurization ratio of organic sulfur can be described with an Arrhenius empirical equation. The rate constant, pre-exponential factor and the activation energy of the reaction increased with the decrease in particle diameter. | Xu Longjun Peng Tiefeng Zhang Dingyue Zhang Fukaia | 2012 | International Journal of Mining Science and Technology2012，22，1： | 7 |
| 5 | X-Mechanics——An endless frontier显示文摘In contrast to the conventional wisdom that mechanics is a relatively mature subject, the new manifestation of mechanics in an extended or crossed form is unfolding. Mechanics is now powering all subjects, from physical sciences, life sciences to social sciences. We name this new phase for the development of mechanics X-Mechanics. The present article outlines the contents of X-Mechanics from four aspects: cross media, cross scales, cross compliances, and cross cyber/physical spaces. X-Mechanics constitutes an endless frontier of science and technology. | Wei Yang HongTao Wang TieFeng Li ShaoXing Qu | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，1： | 6 |
| 6 | RATE DEPENDENT STRESS-STRETCH RELATION OF DIELECTRIC ELASTOMERS SUBJECTED TO PURE SHEAR LIKE LOADING AND ELECTRIC FIELD显示文摘The performance of dielectric elastomer(DE) transducers is significantly affected by viscoelastic relaxation-induced electromechanical dissipations.This paper presents an experimental study to obtain the rate dependent stress-stretch relation of DE membranes(VHB TM 9473) subjected to pure shear like loading and electric loading simultaneously.Stretching rate dependent behavior is observed.The results also show that the tensile force decreases as the voltage increases.The observations are compared with predictions by a viscoelastic model of DE.This experiment may be used for further studies of dynamic electromechanical coupling properties of DEs. | Shaoxing Qu Ke Li Tiefeng Li Hanqing Jiang Miao Wang Zhenhua Li | 2012 | Acta Mechanica Solida Sinica2012，25，5： | 5 |
| 7 | Leaching process and kinetics of manganese in low-grade manganese ore显示文摘Manganese was extracted from leaching low-grade manganese ore in sulfuric acid medium. The effects of granule diameter, leaching time, liquid/solid ratio (V/W) and the concentration of sulfuric acid were investigated through orthogonal and single factor experiments. The experimental results showed that the optimal leaching conditions are, size of 0.054mm, 120 minutes of reaction time, 3(V/W) of liquid/solid ratio and 30% of the concentration of sulfuric acid (g/g). Under those conditions, the leaching efficiency is 96.73%. The kinetics of the leaching process is in accordance with the characteristics of fractal reaction. | XIE Chao XU Longjun PENG Tiefeng CHEN Kun ZHAO Jing | 2013 | Chinese Journal Of Geochemistry2013，32，2： | 5 |
| 8 | Pharmacokinetics and radiation dosimetry of ^(99m)Tc-3PRGD_2 in healthy individuals:A pilot study显示文摘99mTc-3PRGD2 is a new SPECT radiotracer for several tumor imaging with high uptake where integrinαvβ3 is highly expressed.This pilot study was to assess the safety,biodistribution and radiation dosimetry of 9,mTc-3PRGD2 in healthy volunteers.The 10 healthy male volunteers were injected with 99mTc-3PRGD2(786.7±55.8 MBq,19.1-24.2 mCi).Baseline measurements of vital signs,laboratory safety tests and 12-lead electrocardiogram were recorded before and after injection.Blood and urine samples were collected and radiation counts were obtained at various time points.Whole-body scans and ROIs of identified organs were used for visual analysis and estimating the radiation dosimetry.No adverse reactions were found during the study.99mTc-3PRGD2 exhibited a rapid clearance from the blood with less than 45%of the initial dosage at 10 min after injection and gradual increasing radioactivity in urine with(52.9±6)%of original dose at 1440 min.The whole-body imaging showed high radioactive accumulation in bladder.And the highest 99mTc-3PRGD2 uptake was found in the kidneys(3.50×10-2 mSv/MBq).The 99mTc-3PRGD2 exhibited good pharmacokinetic properties and little radiation burden.This study showed that 99mTc-3PRGD2 would be a safe and attractive SPECT agent in clinic applications. | CHENG Guanghui GAO Shi JI Tiefeng MA Qingjie JIA Bing CHEN Zuowei WANG Qing | 2012 | Nuclear Science and Techniques2012，23，6： | 5 |
| 9 | Intrinsic Kinetic Modeling of Thermal Dimerization of C5 Fraction显示文摘This work aims to investigate the intrinsic kinetics of thermal dimerization of C_5 fraction in the reactive distillation process. Experiments are conducted in an 1000-m L stainless steel autoclave under some selected design conditions. By means of the weighted least squares method, the intrinsic kinetics of thermal dimerization of C_5 fraction is established, and the corresponding pre-exponential factor as well as the activation energy are determined. For example, the pre-exponential factor A is equal to 4.39×105 and the activation energy E4 a is equal to 6.58×10J/mol for the cyclopentadiene dimerization reaction. The comparison between the experimental and calculated results shows that the kinetics model derived in this work is accurate and reliable, which can be used in the design of reactive distillation columns. | Guo Liang Wang Tiefeng Li Dongfeng Wang Jinfu | 2016 | China Petroleum Processing & Petrochemical Technology2016，18，1： | 4 |
| 10 | Review of Soft Linear Actuator and the Design of a Dielectric Elastomer Linear Actuator显示文摘Natural muscle provides excellent motilities for animals.As the basic unit of the muscle system,the skeletal muscle fibers function as a soft linear actuator.Inspired by the muscle fibers,researchers have developed various soft active devices with linear actuation.This paper reviews several soft linear actu ators,such as the dielec trie elastomer,t hermal responsive hydrogels,pneumatic artificial muscle,and conducting polymers.The actuation mechanisms and performances of these soft linear actuators are summarized.Based on the dielectric elastomer,we propose a design of a hybrid system with linear actuation,driven by both the electric motor and dielectric elasto mer cone.The elec tromechanical behaviors of the dielec trie elastomer cone have been investigated in both experiment and finite element analysis.This work may guide the further design of soft actuators and robots. | Xunuo Cao Mingqi Zhang Zhen Zhang Yi Xu Youhua Xiao Tiefeng Li | 2019 | Acta Mechanica Solida Sinica2019，32，5： | 4 |
| 11 | Flotation mechanism of octylic hydroxamic acid on diaspore显示文摘Bauxite resources are widely spread in the earth. However, the effective utilization of this mineral is still under infant. The conventional collector for diaspore mineral is oleic acid. It has three main drawbacks which are highly insoluble, large dosages in bauxite flotation, and low selectivity, which hinder its application in industry. In this research, octylic hydroxamic acid was synthesized, and its collecting ability toward two major minerals in bauxite-diaspore and kaolinite was investigated. The collecting power of various reagents for diaspore are shown as follows: oleic acid | LIU Sanjun QIN Wenqing PENG Tiefeng HU Yuehua | 2013 | Chinese Journal Of Geochemistry2013，32，2： | 3 |
| 12 | In-situ construction of a Mg-modified interface to guide uniform lithium deposition for stable all-solid-state batteries显示文摘Uniform lithium(Li)deposition in all-solid-state Li metal batteries is greatly influenced by the anode/electrolyte interface.Herein,a Mg-modified interface was constructed via the simple in-situ electrochemical reduction of Mg^(2+)from Mg(TFSI)_(2) in polyethylene oxide(PEO)and a Li bis(trifluoromethane)sulfoni mide(Li TFSI)formulae.As confirmed by cryogenic transmission electron microscopy,the anode/electrolyte interface exhibited hybrids consisting of crystalline Mg,Li_(2)O,and Li dots embedded in an amorphous polymer electrolyte.The crystalline Mg dots guided the uniform Li nucleation and growth,inducing a smoother anode/electrolyte interface compared with the pristine electrolyte.With 1 wt%Mg(TFSI)_(2) in the PEO-Li TFSI electrolyte,the Mg-modified electrolyte enabled the Li/Li symmetric cells with cycling performance of over 1700 and 1400 h at current densities of 0.1 and 0.2 m A cm^(-2),respectively.Moreover,the full LFP/Li cells using the novel Mg-modified electrolyte delivered a cycling lifespan of over 450 cycles with negligible capacity loss. | Tiefeng Liu Jiale Zheng Hualiang Hu Ouwei Sheng Zhijin Ju Gongxun Lu Yujing Liu Jianwei Nai Yao Wang Wenkui Zhang Xinyong Tao | 2021 | Journal of Energy Chemistry2021，30，4： | 3 |
| 13 | Leaching of manganese residue for the preparation of trimanganese tetroxide with a high surface area显示文摘The accumulation of electrolytic manganese residue (EMR) has become a serious problem and its recycling will be of great benefit to protect the environment and assist sustainable development. The reusing method was conducted by leaching EMR with sulfuric acid and the optimal leaching condition was 1:3 (g/g) as the ratio of solid to liquid with 20% (g/g) H2SO4 , heating at 90 ℃ for 3 hours, which aims at extracting Mn in a sulfuric acid medium. The produced MnSO4 solution was precipitated by adding alkali and oxidized in aqueous phase. The oxidized products were characterized by various techniques, including X-ray powder diffraction (XRD), Fourier transform infrared (IR) spectrometry, vibrating sample magnetometry (VSM), with Brunauer-Emmett-Teller (BET) specific surface area instrument and laser particle size analyzer. The final products were confirmed to be a single-phase Mn3O4 . | PENG Tiefeng XU Longjun WANG Xingmin | 2013 | Chinese Journal Of Geochemistry2013，32，3： | 3 |
| 14 | Preparation of AZO Nanoparticles, Ceramic Targets and Thin Films by a Co-precipitaition Method显示文摘We comprehensively study the co-precipitation preparation of aluminum doped zinc oxide(AZO) nanoparticles, ceramic target and thin fi lm deposition. The nanoparticles calcined below 700 ℃ possessed pure wurtzite structure of ZnO. When the calcination temperature exceeded 700 ℃, ZnAl_2O_4 phase appeared. The resistivity and relative density of the AZO target pressed from nanoparticles were 3×10^(-3) Ω?cm and 99.1%, respectively. The minimum resistivity of AZO thin films prepared by DC sputtering of the ceramic target reached 4.1×10^(–4) Ω?cm with the mobility of 33 cm^2/v?s and the carrier concentration of 4.5 ×10^(20) cm^(-3). The average optical transmittance of the AZO thin films in the visible wavelength range(400-800 nm) was more than 80%. | 修三木 WEI Tiefeng YANG Ye ZHANG Ting 李佳 SONG Weijie | 2015 | Journal of Wuhan University of Technology(Materials Science)2015，30，6： | 2 |
| 15 | Optical spectroscopy and crystal-field strength of Cr^(3+) in various solid matrixes显示文摘Cr^(3+): BeAl_2O_4 水晶, Cr^(3+): LiNbO_3 水晶,和 ZnO-Al_2O_3-SiO_2glass-ceramic 被 Czochralski 技术获得,布里奇曼方法,并且融化分别地处理。上述 Cr^(3+)-incorporatedsolid-state 材料的光吸收和排放系列被记录。为种 high-qualityCr^(3+) 的技术参数: BeAl_2O_4 和 Cr^(3+): LINbO_3 晶体被获得。结果显示 Cr^(3+) 的光吸收和荧光系列在各种各样的矩阵显示出许多差别。Thesharp 线排出物在 Cr^(3+) 被观察: BeAl_2O_4 和 Cr^(3+): LiNbO_3 晶体。为在不同矩阵的 Cr^(3+) 的 Thecrystal 地参数(D_q ) 从他们的相应系列被计算。它被显示那 Cr^(3+): BeAl_2O_4 和 Cr^(3+): LiNbO_3 属于 thehigh 地地点水晶,当时 Cr^(3+): ZnO-Al_2O_3-SiO_2 玻璃并且眼镜陶器属于 theweak 地地点水晶。 | XIA Haiping WANG Jinhao WANG Hongyin ZHANG Jianli ZHANG Yuepin XU Tiefeng | 2006 | Rare Metals2006，25，1： | 2 |
| 16 | Engineering of a self-adjuvanted iTEP-delivered CT vaccine显示文摘 | Shuyun DONGI Tiefeng XU Peng WANG Peng ZHAO Mingnan CHEN | 2017 | Acta Pharmacologica Sinica2017，38，6： | 2 |
| 17 | Suggestions for Conducting a Reading Comprehension Lesson显示文摘I. Aims and Content of a Reading Comprehension Lesson As stated in the New English Course curriculum, 'the aim of senior school English teaching is to develop students' overall abilities of listening, speaking, reading and writing, with more emphasis on reading'. The main task of a reading comprehension lesson is to develop students' reading ability and help them form good habit of reading. Enabling | Li Tiefeng | 2006 | 基础教育外语教学研究2006，，5： | 2 |
| 18 | Fruit harvesting continuum manipulator inspired by elephant trunk显示文摘By combining the investigation of the biomechanics and behavior of elephant trunk in the performance of a wide range of dexterous manipulations,a novel approach in the design and kinematics modeling of a fruit harvesting continuum manipulator was proposed.By comparing the structure of two different species of elephant trunk,a new continuum structure which matched the key features of elephant trunk was designed.Based on analysis of the underlying elephant trunk’s grasping mode,a novel kinematics model was proposed.Contrast to traditional robot kinematics which focused on end effector’s position and posture,the proposed continuum manipulator kinematics focus on the center of manipulator’s position and posture,which is more effective when trunk robot realizing grasp and establishes the foundation for its application.Finally,three typical grasping experiments were implemented.The experiment results showed that the manipulator could conduct wrap/pinch manipulations effectively for both small objects and bigger ones. | Shao Tiefeng Zhang Libin Du Mingyu Bao Guanjun Yang Qinghua | 2015 | International Journal of Agricultural and Biological Engineering2015，8，1： | 2 |
| 19 | Recentadvancesincarbon‐basedmaterials for solar‐driven interfacial photothermal conversion water evaporation:Assemblies,structures,applications,and prospective显示文摘The shortage of fresh water in the world has brought upon a serious crisis to human health and economic development.Solar‐driven interfacial photothermal conversion water evaporation including evaporating seawater,lake water,or river water has been recognized as an environmentally friendly process for obtaining clean water in a low‐cost way.However,water transport is restricted by itself by solar energy absorption capacity's limits,especially for finite evaporation rates and insufficient working life.Therefore,it is important to seek photothermal conversion materials that can efficiently absorb solar energy and reasonably design solar‐driven interfacial photothermal conversion water evaporation devices.This paper reviews the research progress of carbon‐based photothermal conversion materials and the mechanism for solar‐driven interfacial photothermal conversion water evaporation,as well as the summary of the design and development of the devices.Based on the research progress and achievements of photothermal conversion materials and devices in the fields of seawater desalination and photothermal electric energy generation in recent years,the challenges and opportunities faced by carbon‐based photothermal conversion materials and devices are discussed.The prospect of the practical application of solar‐driven interfacial photothermal conversion evaporation technology is foreseen,and theoretical guidance is provided for the further development of this technology. | Yanmin Li Yanying Shi Haiwen Wang Tiefeng Liu Xiuwen Zheng Shanmin Gao Jun Lu | 2023 | Carbon Energy2023，5，11： | 2 |
| 20 | FLOW BEHAVIOR AND MASS TRANSFER IN THREE-PHASE EXTERNAL-LOOP AIRLIFT REACTORS WITH LARGE PARTICLES显示文摘The flow behavior and mass transfer in a three-phase external-loop airlift reactor can be improved by adding large particles. The mass transfer and liquid dispersion behavior for a three-phase external-loop reactor with large particles are studied in terms of the effect of the diameter and loading of the large particles on the liquid dispersion coef- ficient and mass transfer coefficient. The results showed that increasing the diameter or loading of the large particles tend to decrease dispersion and intensify mass transfer, and that an increase in the diameter of the large particles remarkably decreases the particle loop rate, while the effect of fine particles is much less notable. | Malin Liu Tongwang Zhang Tiefeng Wang Jinfu Wang Yong Jin | 2006 | China Particuology2006，4，3： | 2 |
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