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| 1 | Analysis of PM2.5 concentrations in Heilongjiang Province associated with forest cover and other factors显示文摘Atmospheric particulate matter(PM2.5) seriously influences air quality. It is considered one of the main environmental triggers for lung and heart diseases. Air pollutants can be adsorbed by forest. In this study we investigated the effect of forest cover on urban PM2.5 concentrations in 12 cities in Heilongjiang Province,China. The forest cover in each city was constant throughout the study period. The average daily concentration of PM2.5 in 12 cities was below 75 lg/m^3 during the non-heating period but exceeded this level during heating period. Furthermore, there were more moderate pollution days in six cities. This indicated that forests had the ability to reduce the concentration of PM2.5 but the main cause of air pollution was excessive human interference and artificial heating in winter. We classified the 12 cities according to the average PM2.5 concentrations. The relationship between PM2.5 concentrations and forest cover was obtained by integrating forest cover, land area,heated areas and number of vehicles in cities. Finally,considering the complexity of PM2.5 formation and based on the theory of random forestry, we selected six cities and analyzed their meteorological and air pollutant data. The main factors affecting PM2.5 concentrations were PM10,NO_2, CO and SO_2 in air pollutants while meteorological factors were secondary. | Yu Zheng San Li Chuanshan Zou Xiaojian Ma Guocai Zhang | 2019 | Journal of Forestry Research2019，30，1： | 6 |
| 2 | Active spintronic-metasurface terahertz emitters with tunable chirality显示文摘The ability to generate and manipulate broadband chiral terahertz waves is essential for applications in material imaging,terahertz sensing,and diagnosis.It can also open up new possibilities for nonlinear terahertz spectroscopy and coherent control of chiral molecules and magnetic materials.The existing methods,however,often suffer from low efficiency,narrow bandwidth,or poor flexibility.Here,we propose a novel type of laser-driven terahertz emitters,consisting of metasurface-patterned magnetic multilayer heterostructures,that can overcome the shortcomings of the conventional approaches.Such hybrid terahertz emitters combine the advantages of spintronic emitters for being ultrabroadband,efficient,and highly flexible,as well as those of metasurfaces for the powerful control capabilities over the polarization state of emitted terahertz waves on an ultracompact platform.Taking a stripe-patterned metasurface as an example,we demonstrate the efficient generation and manipulation of broadband chiral terahertz waves.The ellipticity can reach>0.75 over a broad terahertz bandwidth(1 to 5 THz),representing a high-quality and efficient source for few-cycle circularly polarized terahertz pulses with stable carrier waveforms.Flexible control of ellipticity and helicity is also demonstrated with our systematic experiments and numerical simulations.We show that the terahertz polarization state is dictated by the interplay between laser-induced spintronic-origin currents and the screening charges/currents in the metasurfaces,which exhibits tailored anisotropic properties due to the predesigned geometric confinement effects.Our work opens a new pathway to metasurface-tailored spintronic emitters for efficient vector-control of electromagnetic waves in the terahertz regime. | Changqin Liu Shunjia Wang Sheng Zhang Qingnan Cai Peng Wang Chuanshan Tian Lei Zhou Yizheng Wu Zhensheng Tao | 2021 | Advanced Photonics2021，3，5： | 4 |
| 3 | Monte carlo study on 6 MV photon beams of a CyberKnife stereotactic radiosurgery system显示文摘In this paper,the beam quality and percent depth dose curves for different field sizes of CyberKnife? system were investigated by Monte Carlo simulations using the PENELOPE code,which has been used to simulate 6 MV photon beam.In water phantom,the absolute doses were calculated for Φ10–60 mm collimators,and percent depth dose curves were evaluated for Φ30–60 mm collimators.The agreement of dose distributions of the calculation with measurement was within 3.0%.The mean energy of photon spectrum was 1.46 MeV,and the beam quality index was 0.632,which was slightly smaller than that of measurement. | DONG Xiaoqing LUO Wenyun YUE Kun WANG Chuanshan ZHOU Shiqing PAN Fuxing WANG Enmin WANG Chaozhuang | 2010 | Nuclear Science and Techniques2010，21，1： | 4 |
| 4 | Solitary beam propagation in periodic layered Kerr media enables high-efficiency pulse compression and mode self-cleaning显示文摘Generating intense ultrashort pulses with high-quality spatial modes is crucial for ultrafast and strong-field science and can be achieved by nonlinear supercontinuum generation(SCG)and pulse compression.In this work,we propose that the generation of quasi-stationary solitons in periodic layered Kerr media can greatly enhance the nonlinear lightmatter interaction and fundamentally improve the performance of SCG and pulse compression in condensed media.With both experimental and theoretical studies,we successfully identify these solitary modes and reveal their unified condition for stability.Space-time coupling is shown to strongly influence the stability of solitons,leading to variations in the spectral,spatial and temporal profiles of femtosecond pulses.Taking advantage of the unique characteristics of these solitary modes,we first demonstrate single-stage SCG and the compression of femtosecond pulses from 170 to 22 fs with an efficiency>85%.The high spatiotemporal quality of the compressed pulses is further confirmed by highharmonic generation.We also provide evidence of efficient mode self-cleaning,which suggests rich spatiotemporal self-organization of the laser beams in a nonlinear resonator This work offers a route towards highly efficient,simple,stable and highly flexible SCG and pulse compression solutions for state-of-the-art ytterbium laser technology. | Sheng Zhang Zongyuan Fu Bingbing Zhu Guangyu Fan Yudong Chen Shunjia Wang Yaxin Liu Andrius Baltuska Cheng Jin Chuanshan Tian Zhensheng Tao | 2021 | Light(Science & Applications)2021，10，4： | 3 |
| 5 | Removal of aflatoxin B 1 in edible plant oils by oscillating treatment with alkaline electrolysed water显示文摘 | Sufang Fan Fengzu Zhang Shaowen Liu Chuanshan Yu Di Guan Canping Pan | 2013 | Food Chemistry2013，，3： | 2 |
| 6 | A novel scheme for ultrashort terahertz pulse generation over a gapless wide spectral range:Raman-resonance-enhanced four-wave mixing显示文摘Ultrashort energetic terahertz(THz)pulses have created an exciting new area of research on light interactions with matter.For material studies in small laboratories,widely tunable femtosecond THz pulses with peak field strength close to MV cm-1 are desired.Currently,they can be largely acquired by optical rectification and difference frequency generation in crystals without inversion symmetry.We describe in this paper a novel scheme of THz pulse generation with no frequency tuning gap based on Raman-resonance-enhanced four-wave mixing in centrosymmetric media,particularly diamond.We show that we could generate highly stable,few-cycle pulses with near-Gaussian spatial and temporal profiles and carrier frequency tunable from 5 to>2o THz.They had a stable and controllable carrier-envelop phase and carried~15 nJ energy per pulse at 10 THz(with a peak field strength of~1 MV cm^(-1)at focus)from a O.5-mm-thick diamond.The measured THz pulse characteristics agreed well with theoretical predictions.Other merits of the scheme are discussed,including the possibility of improving the THz output energy to a much higher level. | Jiaming Le Yudan Su Chuanshan Tian A.H.Kung Y.Ron Shen | 2023 | Light(Science & Applications)2023，12，2： | 2 |
| 7 | Extraction optimization of insecticidal compounds from Lysurus mokusin by response surface methodology显示文摘We optimized the extraction process of Lysurus mokusin(L.)Fr.insecticidal compound(LMIC)using response surface methodology with ultrasonic extraction(UE).The surface morphologies of maceration extract(ME)and UE residues were compared by scanning electron microscopy,and then the activity of LMIC on Lymantria dispar(Asian gypsy moths)larvae was determined.Results showed that the optimal condition of UE was followed by 80 min of extraction time,60%of ethanol concentration and 80 mL g^-1 of liquid–solid ratio.The surface morphologies of UE residue were looser and rougher than ME residue.The corrected mortalities of LMIC on L.dispar larvae was 59.77%.This result indicated that L.mokusin was a good candidate as pesticide for pest management. | Liannan Lin Jing Yang Guocai Zhang Xiaobo Zhang Chuanshan Zou Tingyu Wang Jianyong Zeng | 2020 | Journal of Forestry Research2020，31，5： | 2 |
| 8 | Theoretical analysis of a thermoelectric generator using exhaust gas of vehicles as heat source显示文摘 | Yuchao Wang Chuanshan Dai Shixue Wang | 2013 | Applied Energy2013，，： | 1 |
| 9 | CHEMAS: Identify suspect nodes in selective forwarding attacks 显示文摘 | XIAO BIN YU BO GAO CHUANSHAN | 2007 | Journal of Parallel and Dis- tributed Computing2007，67，11： | 1 |
| 10 | Simultaneous deter- ruination of 36 pesticide sidues in spinach and cauliflower by LC- MS/MS using muhi-walled carbon nanotubes-based dispersive solid- phase clean-up显示文摘 | Fan Sufang Zhao Pengyue Yu Chuanshan | 2014 | blood Additives & Contaminants Part A: Chem- istry Analysis Control Exposure & Risk Assessment2014，31，1： | 1 |
| 11 | Monte carlo study on 6MV photon beam of a CyberKnife stereotactic radiosurgery system显示文摘 | DONG Xiaoqing LUO Wenyun YUE Kun WANG Chuanshan ZHOU Shiqing PAN Fuxing WANG Enmin WANG Chaozhuang | | 0，，： | 1 |
| 12 | CHEMAS: Identify Suspect Nodes in Selective Forwarding Attacks显示文摘 | Xiao Bin Yu Bo Gao Chuanshan | 2007 | Journal of Parallel and Distributed Computing2007，67，11： | 1 |
| 13 | CHEMAS: indentify suspect nodes in selective forwarding attacks显示文摘 | Xiao Bin Yu Bo Gao Chuanshan | 2007 | Journal of Parallel and Distributed Computing2007，67，11： | 1 |
| 14 | Energy loss caused by shielding effect of steel cage outside source tube显示文摘The energy loss, produced by shielding effect of steel cage outside the source tube, is quite considerable. With PENELOPE software package, MC results have been obtained based on the simulation of different source con- formations. The result illustrates that the naked source tubes can improve the utilization ratio of the cobalt facilities. It demonstrates the applied value of the naked source tube in engineering. | LI Da WANG Chuanshan LUO Wenyun WEI Zhongyuan | 2007 | Nuclear Science and Techniques2007，18，2： | 1 |
| 15 | CHEMAS:Identify suspect nodes in selective forwarding attacks显示文摘 | Xiao ain Yu Bo Gao Chuanshan | 2007 | Journal of Parallel and Distributed Computing2007，67，11： | 1 |
| 16 | Gate- Variable Optical Transitions in Graphene 显示文摘 | Wang Feng Zhang Yuanbo Tian Chuanshan | 2008 | Science2008，320，5873： | 1 |
| 17 | Gate-variable optical transitions in graphene 显示文摘 | WANG Feng ZHANG Yuanbo TIAN Chuanshan | 2008 | Science (S0036-8075)2008，320，5873： | 1 |
| 18 | M-C simulation of shielding effects of PE,LiH and graphite fibers under 1 MeV electrons and 20 MeV protons显示文摘Shielding effects of different materials under 1 MeV electron and 20 MeV proton beams were simulated with Geant4 code. It was found that shielding effects of polyethylene and graphite fibers are much better than aluminum. Energy depositions in the phantom shielded by the materials are calculated, with the least energy deposition by graphite fiber shielding. The results show that graphite fibers are good radiation shielding material in space programs. | YUE Kun LUO Wenyun ZHA Yuanzi DONG Xiaoqing WANG Chuanshan | 2008 | Nuclear Science and Techniques2008，19，6： | 1 |
| 19 | CHEMAS: Identify suspect nodes in selective forwarding attacks 显示文摘 | Bin X Bo Y Chuanshan G | 2007 | Academic Press Inc2007，67，： | 1 |
| 20 | 1 Kunlun earthquake显示文摘 | LIAO CHUNTING ZHANG CHUANSHAN WU MANLU Stress change near the Kunlun fault before and after Ms 8 | 2003 | Geo- physical Research Letters2003，30，20： | 1 |
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