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| 1 | Synthesis and antitumor and antibacterial evaluation of fluoroquinolone derivatives(Ⅲ):Mono- and bis-Schiff-bases显示文摘To further explore an efficient modified route for the shift from an antibacterial fluoroquinolone to an antitumor one,mono-Schiff bases 6a-6h related to ciprofloxacin C3 carbonylhydrazone and bis-Schiff bases 4a-4h corresponding to C3/C7 carbonylhydrazone/hydrazone attached on a skeleton of ciprofloquinolone were designed and synthesized,and their in vitro antitumor activity against CHO,HL60,L1210 cells and antibacterial activity against Staphylococcus aureus and Escherichia coli were also reported. | Guo Qiang Hu Xiao Kui Wu Guo Qiang Wang Nan Nan Duan Xiao Yi Wen Tie Yao Cao Yin Jun Wang Wei Song Qiang Xie Wen Long Huang | 2012 | Chinese Chemical Letters2012，23，5： | 8 |
| 2 | Information theory of metasurfaces显示文摘We propose a theory to characterize the information and information processing abilities of metasurfaces,and demonstrate the relation between the information of the metasurface and its radiation pattern in the far-field region.By incorporating a general aperturemodel with uncertainty relation in L2-space,we propose a theory to predict the upper bound of information contained in the radiation pattern of a metasurface,and reveal the theoretical upper limit of orthogonal radiation states.Theproposed theory also provides guidance for inverse design of the metasurface with respect to given functionalities.Through investigation of the information of disordered-phase modulated metasurfaces,we find the information invariance(1?γ,whereγis Euler’s constant)of chaotic radiation patterns.That is to say,the information of the disordered-phase modulated radiation patterns is always equal to 1?γ,regardless of variations in size,the number of elements and the phase pattern of metasurface.This value might be the lower bound of radiation-pattern information of the metasurface,which can provide a theoretical limit for information modulation applications,including computational imaging,stealth technologies and wireless communications. | Haotian Wu Guo Dong Bai Shuo Liu Lianlin Li Xiang Wan Qiang Cheng Tie Jun Cui | 2020 | National Science Review2020，7，3： | 5 |
| 3 | A versatile photodetector assisted by photovoltaic and bolometric effects显示文摘The advent of low-dimensional materials with peculiar structure and superb band properties provides a new canonical form for the development of photodetectors.However,the limited exploitation of basic properties makes it difficult for devices to stand out.Here,we demonstrate a hybrid heterostructure with ultrathin vanadium dioxide film and molybdenum ditelluride nanoflake.Vanadium dioxide is a classical semiconductor with a narrow bandgap,a high temperature coefficient of resistance,and phase transformation.Molybdenum ditelluride,a typical two-dimensional material,is often used to construct optoelectronic devices.The heterostructure can realize three different functional modes:(i)the p-n junction exhibits ultrasensitive detection(450 nm-2μm)with a dark current down to 0.2 pA and a response time of 17μs,(ii)the Schottky junction works stably under extreme conditions such as a high temperature of 400 K,and(iii)the bolometer shows ultrabroad spectrum detection exceeding 10μm.The flexible switching between the three modes makes the heterostructure a potential candidate for next-generation photodetectors from visible to longwave infrared radiation(LWIR).This type of photodetector combines versatile detection modes,shedding light on the hybrid application of novel and traditional materials,and is a prototype of advanced optoelectronic devices. | Wei Jiang Tan Zheng Binmin Wu Hanxue Jiao Xudong Wang Yan Chen Xiaoyu Zhang Meng Peng Hailu Wang Tie Lin Hong Shen Jun Ge Weida Hu Xiaofeng Xu Xiangjian Meng Junhao Chu Jianlu Wang | 2020 | Light(Science & Applications)2020，9，1： | 3 |
| 4 | Oxidation of CO on Nanometer Metal Oxides at Low Temperatures显示文摘OxidationofCOonNanometerMetalOxidesatLowTemperatures*ZHANGWen-xiang**,JIAMing-jun,ZHAOJing-zhe,ZHANGChun-lei,WUTong-hao(Depar... | ZHANG Wen xiang ** , JIA Ming jun, ZHAO Jing zhe, ZHANG Chun lei, WU Tong hao (Department of Chemistry, Jilin University, Changchun, 130023) WANG Xue guang (Fushun Research Institute of Petroleum and Petrochemicals, Fushun, 113001) SUN Tie | 1997 | Chemical Research in Chinese Universities1997，13，4： | 3 |
| 5 | Greenhouse gas emissions from a constructed wetland for municipal sewage treatment显示文摘The fluxes of greenhouse gases (methane and nitrous oxide) emission from a constructed wetland in the Eastern China as municipal sewage treatment were measured from June 1999 to August 2000 by the closed chamber method. The constructed wetland for municipal sewage treatment is a significant source of methane, up to 976 6×10 6 g CH 4/a, which was emitted from the constructed wetland with the area of 495000 m 2 and wastewater loading rate of 12000 m 3/d. Its daily mean methane flux reached 5 22 g CH 4/(m 2·d), 250 times as much as that in natural wetland in the same latitude region. 227 8 mg CH 4 was produced from the treatment of 1 liter wastewater, up to 700—1000 times as much as that in the secondary treatment. The emission of nitrous oxide from the constructed wetland is not higher than that from secondary treatment of wastewater, only 0 07 mgN 2O/L. | TAI Pei dong 1, LI Pei jun 1 , SUN Tie heng 1, HE Yao wu 1, ZHOU Qi xing 1 GONG Zong qiang 1, Motoyuki Mizuochi 2, Yuhei Inamori 2 (1 Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015, China. 2 National Insti | 2002 | Journal of Environmental Sciences2002，14，1： | 3 |
| 6 | Control of the harmonic near-field distributions by an active metasurface loaded with pin diodes显示文摘Recent advances of space-time-coding digital metasurfaces demonstrate powerful capabilities in the generation of nonlinear harmonics and the accurate control of the corresponding wavefronts. However, to date the near field manipulation and the experiment characterization are still not explored. In this paper, we propose a space-timedigital coding metasurface to realize accurate manipulation of the near fields at the fundamental and +1 st(-1 st)harmonics simultaneously, by properly controlling the initial phase and time delay of the time varying reflectivity.A novel mapping system is established to measure the nonlinear near field distributions of multiharmonics. Both the simulation and experimental results demonstrate the validity of the proposed method. | Jin Yang Jun Chen KE Mao CHEN Ming Zheng Chen Jun Yan Dai Jian Feng Chen Rui Yang Jun Wei Wu Qiang Cheng Tie Jun Cui | 2021 | Photonics Research2021，9，3： | 3 |
| 7 | Space-frequency-polarization-division multiplexed wireless communication system using anisotropic space-time-coding digital metasurface显示文摘In the past few years,wireless communications based on digital coding metasurfaces have gained research interest owing to their simplified architectures and low cost.However,in most of the metasurface-based wireless systems,a single-polarization scenario is used,limiting the channel capacities.To solve the problem,multiplexing methods have been adopted,but the system complexity is inevitably increased.Here,a space-frequency-polarization-division multiplexed wireless communication system is proposed using an anisotropic space-time-coding digital metasurface.By separately designing time-varying control voltage sequences for differently oriented varactor diodes integrated on the metasurface,we achieve frequency-polarization-division multiplexed modulations.By further introducing different time-delay gradients to the control voltage sequences in two polarization directions,we successfully obtain space-frequency-polarization-division multiplexed modulations to realize a wireless communication system with a new architecture.The new communication system is designed with compact dual-polarized meta-elements,and can improve channel capacity and space utilization.Experimental results demonstrate the high-performance and real-time transmission capability of the proposed communication system,confirming its potential application in multiple-user collaborative wireless communications. | Jun Chen Ke Xiangyu Chen Wankai Tang Ming Zheng Chen Lei Zhang Li Wang Jun Yan Dai Jin Yang Jun Wei Zhang Lijie Wu Qiang Cheng Shi Jin Tie Jun Cui | 2022 | National Science Review2022，9，11： | 2 |
| 8 | Non-Hermitian Skin Effect in a Non-Hermitian Electrical Circuit显示文摘The conventional bulk-boundary correspondence directly connects the number of topological edge states in a finite system with the topological invariant in the bulk band structure with periodic boundary condition(PBC).However,recent studies show that this principle fails in certain non-Hermitian systems with broken reciprocity,which stems from the non-Hermitian skin effect(NHSE)in the finite system where most of the eigenstates decay exponentially from the system boundary.In this work,we experimentally demonstrate a 1D non-Hermitian topological circuit with broken reciprocity by utilizing the unidirectional coupling feature of the voltage follower module.The topological edge state is observed at the boundary of an open circuit through an impedance spectra measurement between adjacent circuit nodes.We confirm the inapplicability of the conventional bulk-boundary correspondence by comparing the circuit Laplacian between the periodic boundary condition(PBC)and open boundary condition(OBC).Instead,a recently proposed non-Bloch bulk-boundary condition based on a non-Bloch winding number faithfully predicts the number of topological edge states. | Shuo Liu Ruiwen Shao Shaojie Ma Lei Zhang Oubo You Haotian Wu Yuan Jiang Xiang Tie Jun Cui Shuang Zhang | 2021 | Research2021，，1： | 2 |
| 9 | Weighted support vector machines forregression and its application 显示文摘 | DU Shu xin WU Tie jun | 2004 | Journal of Zhejiang University2004，138，3： | 1 |
| 10 | Liquid state dependent solidification of a Co-B eutectic alloy under a high magnetic field显示文摘The structure transition inside the Co-81.5at.%B alloy liquid has been studied by an in-situ magnetization measurement.A crossover was observed on the 1/M-T curve during the overheating process,indicating that a liquid-liquid structure transition(LLST)took place in the melt.Based on this information,the effects of LLST on the solidification behavior,microstructure and tribology property were investigated experimentally.The sample solidified with the LLST exhibits significantly different solidification behaviors,i.e.,the nucleation undercooling and the recalescence extent are conspicuously enlarged,and the solidification time is shortened.As a result,the microstructure is effectively refined and homogenized,and the hardness and wear resistance are significantly enhanced.The present work might be helpful for not only theoretically understanding the influence of LLST on the solidification behavior but also providing an alternative approach to tailor the microstructure and properties. | Yixuan He Fan Bu Yuhao Wu Jianbao Zhang Dawei Luo Zhangchi Bian Qing Zhou Tie Liu Qiang Wang Jun Wang Haifeng Wang Jinshan Li Eric Beaugnon | 2022 | Journal of Materials Science & Technology2022，，21： | 1 |
| 11 | Harmonic information transitions of spatiotemporal metasurfaces显示文摘Facilitated by ultrafast dynamic modulations,spatiotemporal metasurfaces have been identified as a pivotal platform for manipulating electromagnetic waves and creating exotic physical phenomena,such as dispersion cancellation,Lorentz reciprocity breakage,and Doppler illusions.Motivated by emerging information-oriented technologies,we hereby probe the information transition mechanisms induced by spatiotemporal variations and present a general model to characterize the information processing capabilities of the spatiotemporal metasurface.Group theory and abstract number theory are adopted through this investigation,by which the group extension and independent controls of multiple harmonics are proposed and demonstrated as two major tools for information transitions from the spatiotemporal domain to the spectra-wavevector domain.By incorporating Shannon’s entropy theory into the proposed model,we further discover the corresponding information transition efficiencies and the upper bound of the channel capacity of the spatiotemporal metasurface.The results of harmonic information transitions show great potential in achieving high-capacity versatile information processing systems with spatiotemporal metasurfaces. | Haotian Wu Xin Xin Gao Lei Zhang Guo Dong Bai Qiang Cheng Lianlin Li Tie Jun Cui | 2020 | Light(Science & Applications)2020，9，1： | 1 |
| 12 | Simulation and Experiment on SIW Slot Array Antennas 显示文摘 | Li Yah Wei Hong Guang Hua Jixin Chert Ke Wu Tie Jun Cui | 2004 | IEEE Microwave and Wireless Components Letters (S1531-1309)2004，14，9： | 1 |
| 13 | Macroscopic model and statistical model to characterize electromagnetic information of a digital coding metasurface显示文摘A digital coding metasurface is a platform connecting the digital space and electromagnetic wave space,and has therefore gained much attention due to its intriguing value in reshaping wireless channels and realizing new communication architectures.Correspondingly,there is an urgent need for electromagnetic information theory that reveals the upper limit of communication capacity and supports the accurate design of metasurface-based communication systems.To this end,we propose a macroscopic model and a statistical model of the digital coding metasurface.The macroscopic model uniformly accommodates both digital and electromagnetic aspects of the meta-atoms and predicts all possible scattered fields of the digital coding metasurface based on a small number of simulations or measurements.Full-wave simulations and experimental results show that the macroscopic model is feasible and accurate.A statistical model is further proposed to correlate the mutual coupling between meta-atoms with covariance and to calculate the entropy of the equivalent currents of digital coding metasurface.These two models can help reconfigurable intelligent surfaces achieve more accurate beamforming and channel estimation,and thus improve signal power and coverage.Moreover,the models wi l l encourage the creation of a precoding codebook in metasurface-based direct digital modulation systems,with the aim of approaching the upper limit of channel capacity.With these two models,the concepts of current space and current entropy,as well as the analysis of information loss from the coding space to wave space,is established for the first time,helping to bridge the gap between the digital world and the physical world,and advancing developments of electromagnetic information theory and new-architecture wireless systems. | Rui Wen Shao Jun Wei Wu Zheng Xing Wang Hui Xu Han Qing Yang Qiang Cheng Tie Jun Cui | 2024 | National Science Review2024，11，3： | 0 |
| 14 | A Planar 4-Bit Reconfigurable Antenna Array Based on the Design Philosophy of Information Metasurfaces显示文摘Inspired by the design philosophy of information metasurfaces based on the digital coding concept,a planar 4-bit reconfigurable antenna array with low profile of 0.15λ0(whereλ0is the free-space wavelength)is presented.The array is based on a digital coding radiation element consisting of a 1-bit magnetoelectric(ME)dipole and a miniaturized reflection-type phase shifter(RTPS).The proposed 1-bit ME dipole can provide two digital states of'0'and'1'(with 0°and 180°phase responses)over a wide frequency band by individually exciting its two symmetrical feeding ports.The designed RTPS is able to realize a relative phase shift of 173°.By digitally quantizing its phase in the range of 157.5°,additional eight digital states at intervals of 22.5°are obtained.To achieve low sidelobe levels,a 1:16 power divider based on the Taylor line source method is employed to feed the array,A prototype of the proposed 4-bit antenna array has been fabricated and tested,and the experimental results are in good agreement with the simulations.Scanning beams within a±45°range were measured with a maximum realized gain of 13.4 dBi at12 GHz.The sidelobe and cross-polarization levels are below-14.3 and-23.0 dB,respectively.Furthermore,the beam pointing error is within 0.8°,and the 3 dB gain bandwidth of the broadside beam is 25%.Due to its outstanding performance,the array holds potential for significant applications in radar and wireless communication systems. | Zheng Xing Wang Hanqing Yang Ruiwen Shao Jun Wei Wu Guobiao Liu Feng Zhai Qiang Cheng Tie Jun Cui | 2022 | Engineering2022，，10： | 0 |
| 15 | Realizing complex beams via amplitude-phase digital coding metasurfaces and semidefinite relaxation optimization显示文摘Complex beams play important roles in wireless communications,radar,and satellites,and have attracted great interest in recent years.In light of this background,we present a fast and efficient approach to realize complex beams by using semidefinite relaxation(SDR)optimization and amplitude-phase digital coding metasurfaces.As the application examples of this approach,complex beam patterns with cosecant,flat-top,and double shapes are designed and verified using full-wave simulations and experimental measurements.The results show excellent main lobes and low-level side lobes and demonstrate the effectiveness of the approach.Compared with previous works,this approach can solve the complex beam-forming problem more rapidly and effectively.Therefore,the approach will be of great significance in the design of beam-forming systems in wireless applications. | Junwei WU Qiong HUA Hui XU Hanqing YANG Zhengxing WANG Qiang CHENG Tie Jun CUI | 2023 | Frontiers of Information Technology & Electronic Engineering2023，24，12： | 0 |
| 16 | Interface engineering of ferroelectric-gated MoS_(2) phototransistor显示文摘Two-dimensional(2D)layered materials have received significant attention owing to their unique crystal structures as well as outstanding optical and electric properties in photoelectric detection.However,most 2D materials are very sensitive to the environment.Adsorbates and traps introduced during the preparation process have a negative effect on the performance of devices based on these materials.Here,we focus on a molybdenum disulfide(MoS2)phototransistor gated by ferroelectrics,and insert a hexagonal boron nitride(h-BN)layer between MoS2 and the ferroelectric film to improve the interface.To clarify the role of h-BN in this device,two parallel devices are prepared on the same MoS_(2) flake.One device is covered with h-BN,while the other is in direct contact with the ferroelectric film.The electronic and optoelectronic properties of these two devices are then measured and compared.Experimental results reveal that,compared to device without h-BN,the MoS_(2) phototransistor with h-BN exhibits higher carrier mobility(average value:85 cm^(2)·V^(-1)·s^(-1) and highest value:185 cm^(2)·V^(-1)·s^(-1)),larger responsivity(85 A·W-1),and larger detectivity(1.76×10^(13) Jones).Thus,this strategy is significant for the interface engineering and performance improvement of devices based on 2D materials. | Shuaiqin WU Xudong WANG Wei JIANG Luqi TU Yan CHEN Jingjing LIU Tie LIN Hong SHEN Jun GE Weida HU Xiangjian MENG Jianlu WANG Junhao CHU | 2021 | Science China(Information Sciences)2021，64，4： | 0 |
| 17 | Effects of Benzo(a)pyrene on the Contractile Function of the Thoracic Aorta of Sprague-dawley Rats显示文摘Objective To evaluate the possible vascular effects of an environment carcinogen benzo(a)pyrene (BaP). Methods The cytotoxicit of BaP and rat liver S9 (0.25 mg/mL)-activated BaP were examined by MTT assay. Thoracic aortic rings were dissected from Sprague-Dawley rats. Contraction of aortic rings was induced by 60 mmol/L KCl or 10 -6 mol/L phenylephrine (PE) in an ex-vivo perfusion system after BaP (100 μmol/L) incubation for 6 h. [Ca 2+ ] i was measured using Fluo-4/AM. For in-vivo treatment, rats were injected with BaP for 4 weeks (10 mg/kg, weekly, i.p.). Results BaP (1-500 μm) did not significantly affect cell viability; S9-activated BaP stimulated cell proliferation. BaP did not affect the contractile function of endothelium-intact or -denuded aortic rings. BaP did not affect ATP-induced ([Ca 2+ ] i ) increases in human umbilical vein endothelial cells. In BaP-treated rats, heart rate and the number of circulating inflammatory cells were not affected. Body weight decreased while blood pressure increased significantly. The maximum aortic contractile responses to PE and KCl and the maximum aortic relaxation response to acetylcholine were significantly decreased by 25.0%, 34.2%, and 10.4%, respectively. Conclusion These results suggest, in accordance with its DNA-damaging properties, that metabolic activation is a prerequisite for BaP-induced cardiovascular toxicity. | GAN Tie Er XIAO Su Ping JIANG Ying HU Hu WU Yi Hua DUERKSEN-HUGHES Penelope J SHENG Jian Zhong YANG Jun | 2012 | Biomedical and Environmental Sciences2012，25，5： | 0 |
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