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Thiophene-based conjugated microporous polymers:synthesis,characterization and efficient gas storage

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Science China Chemistry 2017年第8期60卷 1067-1074页

作者： Chao-Jing Sun Xue-qian Zhao Peng-Fei wang Hua wang Bao-hang han CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoseience and Technology Beijing 100190 China

A series of thiophene-based conjugated microporous polymers （ThPOPs） have been synthesized on the basis of ferric chloride-catalyzed oxidative coupling polymerization of muRi-thienyl monomers. The structures of ThPOPs were confirmed via solid-state t3C CP/MAS NMR spectroscopy and Fourier-transform infrared spectroscopy. The ThPOPs possess high porosities and their high Brunauer-Emmett-Teller specific surface area results vary between 350 and 1320mZg . The presence of abundant ultra-micronores at 0.50-0.63 nm allows ThPOPs efficient gas （carbon dioxide, methane, and hydrogen） adsorption.

关键词： conjugated porous organic polymers thiophene gas adsorption oxidative polymerization

Application of dynamic sensor activation on operating automated headlights

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Control Theory and Technology 2020年第3期18卷 246-256页

作者： han DING Yishan qian Chaohui GONG Yunfeng HOu Weilin wang School of Optical-Electrical and computer Engineering University for Shanghai Science and TechnologySshanghai200093China Zhejiang ResearchCenter on Smart Rail Transportation PowerChina Huadong Engineering Corporation LimitedHangzhou Zhejiang 311225China

The controller in an automated vehicle relies on sensors to collect the information needed for handling traffic situations,and reducing the frequency of using sensors could prolong *** present in this paper the application of dynamic sensor activation algorithms in discrete event systems to activate/deactivate sensors for colecting information when it is only necessary to automatically operate headlights based on trafic *** framework developed in this paper forms a basis for automatically activating/deactivating sensors for other components in an automated vehicle in the future.

关键词： Discrete event systems automata supervisory control sensor activation automated headlights

The Unique Strategies of Flight Initiation Adopted by Butterflies on Vertical Surfaces

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Journal of Bionic Engineering 2021年第4期18卷 840-856页

作者： Huan Shen Aihong Ji qian Li Wei wang Guodong Qin Qingfei han Institute of Bio-inspired Structure and Surface Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016China

As the basis of flight behavior,the initiation process of insect flight is accompanied by a transition from crawling mode to flight mode,and is clearly important and *** take flight from a vertical surface,which is more difficult than takeoff from a horizontal plane,but greatly expands the space of activity and provides us with an excellent bionic *** this study,the entire process of a butterfly alighting from a vertical surface was captured by a high-speed camera system,and the movements of its body and wings were accurately measured for the first *** analyzing the movement of the center of mass,it was found that before initiation,the acceleration perpendicular to the wall was much greater than the acceleration parallel to the wall,reflecting the positive effects of the legs during the initiation ***,the angular velocity of the body showed that this process was unstable,and was further destabilized as the flight speed *** the angles between the body and the vertical direction before and after leaving the wall,a significant change in body posture was found,evidencing the action of aerodynamic forces on the *** movement of the wings was further analyzed to obtain the laws of the three Euler angles,thus revealing the locomotory mechanism of the butterfly taking off from the vertical surface.

关键词： flight initiation butterfly vertical surface body and wing kinematics speed and stability strategies

Leaky Interface Wave Measurement at a Solid-Solid Interface with Laser Ultrasonics

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Chinese Physics Letters 2012年第10期29卷 93-96页

作者： wang Hao han Qing-Bang qian Meng-Lu Institute of Acoustics Tongji UniversityShanghai 200092 Changzhou Key Laboratory of Sensor Networks and Environmental Sensing Hohai UniversityChangzhou 213022

The experimental investigation on transparent solid/solid(aluminum and plexiglas)interface leaky waves generated by a pulse laser and detected with a photoelastic effect technique is *** waves,i.e.,longitudinal head wave,leaky Rayleigh wave and leaky interface wave,are detected *** leaky waves propagating along the'weak bonding'interface are also *** is found that with the continuing epoxy solidification,the wave amplitude gradually decreases and the two leaky waves are more difficult to *** velocities of the detected interface wave are in good agreement with the theoretical calculation and the attenuation characteristics of the two leaky waves are also in accordance with the theoretical prediction.

关键词： solidification interface Solid

Performance of the Full-scale Loop Hybrid Reactor Treating Coal Gasification Wastewater under Different Recirculation Modes

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Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 31-37页

作者： qian Zhao Hongjun han Fang Fang wang Bing State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology School of Municipal and Environmental Engineering Shenyang Jianzhu University

This paper aims to investigate the simultaneous removal efficiencies of both COD and nitrogen in a single reactor treating coal gasification wastewater( CGW). A novel loop hybrid reactor was developed and operated under different recirculation modes in order to achieve simultaneous removal of refractory compounds and total nitrogen( TN) in a full-scale CGW treatment plant. Mid-ditch recirculation was superior to other operational modes in terms of the NH3-N and TN removal,resulting in a TN removal efficiency of 52. 3%.Although the system achieved equal COD removal rates under different recirculation modes,hydrophobic acid( HPO-A) fraction of effluent dissolved organic matter( DOMef) in mid-ditch recirculation mode accounted for35.7%,compared to the proportions of 59. 2%,45. 3% and 39. 4% for the other modes. The ultraviolet absorbance to dissolved organic carbon ratio test revealed that effluent under mid-ditch recirculation mode contained more non-aromatic hydrophilic components. Furthermore,appropriate recirculation and anoxic / oxic( A/O) partitions were also demonstrated to remove some refractory metabolites( phenols,alkanes,aniline,etc.),which reduced the chromaticity and improved the biodegradability.

关键词： coal gasification wastewater refractory COD total nitrogen recirculation mode DOM fractionation

Bioinspired ionic control for energy and information flow

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International Journal of Smart and Nano Materials 2024年第1期15卷 198-221页

作者： Puguang Peng han qian Jiajin Liu Zhonglin wang Di Wei Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijingChina School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijingChina School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGAUSA

The control of ion transport by responding to stimulus is a necessary condition for the existence of *** iontronics could enable anomalous ion dynamics in the nano-confined spaces,creating many efficient energy systems and neuromorphic in-sensor computing networks:Unlike tradi-tional electronics based on von Neumann computing architec-ture,the Boolean logic computing based on the iontronics could avoid complex wiring with higher energy efficiency and programmable neuromorphic ***,a systematic summary on the state of art in bioinspired iontronics is pre-sented and the stimulus from chemical potentials,electric fields,light,heat,piezo and magnetic fields on ion dynamics are *** and perspectives are also addressed in the aspects of iontronic integrated *** is believed that comprehensive investigations in bioinspired ionic control will accelerate the development on more efficient energy and information flow for the futuristic human-machine interface.

关键词： lontronics nanoconfined ion transport ion dynamics bioinspired iontronics ionic-electronic coupling interface

Estimating up-limits of eccentricities for the binary black holes in the LIGO-Virgo catalog GWTC-1

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Research in Astronomy and Astrophysics 2020年第11期20卷 283-292页

作者： qian-Yun Yun Wen-Biao han Gang wang Shu-Cheng Yang Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

In the first Gravitational-Wave Transient Catalogue of LIGO and Virgo,all events are announced having zero *** the present paper,we investigate the performance of SEOBNRE,which is a spin-aligned eccentric waveform model in *** comparing with all the eccentric waveforms in SXS library,we find that the SEOBNRE coincides perfectly with numerical relativity *** the SEOBNRE,we re-estimate the eccentricities of all black hole merger *** find that most of these events allow a possibility for existence of initial eccentricities at 10 Hz band,but are totally circularized at the observed frequency(≥20 Hz).The upcoming update of LIGO and the next generation detector like Einstein Telescope will observe the gravitational waves starting at 10 Hz or even *** the eccentricity exists at the lower frequency,then it may significantly support the dynamical formation mechanism taking place in globular clusters.

关键词： gravitational waves stars black holes binaries general

In-situ constructed three-dimensional MoS_(2)–MoN heterostructure as the cathode of lithium–sulfur battery

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Rare Metals 2022年第5期41卷 1743-1752页

作者： Jing-han Zuo Peng-Bo Zhai qian-qian He Lei wang qian Chen Xiao-Kang Gu Zhi-Lin Yang Yong-Ji Gong School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Lithium-sulfur batteries are recognized as one of the most promising next-generation high-performance energy storage systems. However, obstacles like the irreversible capacity loss hinder its broad application. Herein,we fabricated an interconnected three-dimensional MoS_(2)-MoN heterostructure(3D-MoS_(2)-MoN) via a facile salttemplate method, overcoming the intrinsic shortcomings such as poor conductivity and compact morphology of traditionally-synthesized transition metal sulfides(TMSs).Furthermore, excellent electrocatalysis ability and hierarchical pore structure effectively accelerate the sluggish lithium polysulfides conversions during cycling. As a result, 3D-MoS_(2)-MoN showed a high initial specific capacity of 1466 mAh·g^(-1)and excellent high-rate capability up to 4℃. A stable cycling performance with a sulfur loading of 2 mg·cm^(-2) was realized with a low decay rate of 0.069% per cycle. This work introduced a rational design route for the appliance of TMSs in the lithiumsulfur batteries.

关键词： Heterostructure Transition metal sulfides Three-dimensional Electrocatalysis

Three-dimensional coordinates test method with uncertain projectile proximity explosion position based on dynamic seven photoelectric detection screen

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Defence Technology（防务技术） 2022年第9期18卷 1643-1652页

作者： han-shan Li Xiao-qian Zhang School of Electronic and Information Engineering Xi'an Technological UniversityXi'an710021China

To objectively obtain the three-dimensional coordinates of the projectile fuze proximity explosion when projectile intersects the head of missile target, we propose a dynamic seven photoelectric detection screen test method, which is made up of six plane detection screens and a flash photoelectric dynamic detection screen. The three-dimensional coordinates calculation model of the projectile proximity explosion position based on seven plane detection screens with dynamic characteristics is *** to the relation of the dynamic seven photoelectric detection screen planes and the time values,the analytical function of the projectile proximity explosion position parameters under non-linear motion is derived. The projectile signal filtering method based on discrete wavelet transform is explored in this work. Additionally, the projectile signal recognition algorithm using an improved particle swarm is proposed. Based on the characteristics of the time duration and the signal peak error for the projectile passing through the detection screen, the signals attribution of the same projectile passing through six detection screens are analyzed for obtaining precise time values of the same projectile passing through the detection screens. On the basis of the projectile fuze proximity explosion test, the linear motion model and the proposed non-linear motion model are used to calculate and compare the same group of projectiles proximity explosion position parameters. The comparison of test results verifies that the proposed test method and calculation model in this work accurately obtain the actual projectile proximity explosion position parameters.

关键词： Dynamic multi-screen array plane Flash photoelectric detection target Projectile signal processing Particle swarm Proximity explosion fuze Three-dimensional coordinate