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| 1 | A new criterion of coal burst proneness based on the residual elastic energy index显示文摘To evaluate the coal burst proneness more precisely,a new energy criterion namely the residual elastic energy index was proposed.This study begins by performing the single-cyclic loading-unloading uniaxial compression tests with five pre-peak unloading stress levels to explore the energy storage characteristics of coal.Five types of coals from different mines were tested,and the instantaneous destruction process of the coal specimens under compression loading was recorded using a high speed camera.The results showed a linear relationship between the elastic strain energy density and input energy density,which confirms the linear energy storage law of coal.Based on this linear energy storage law,the peak elastic strain energy density of each coal specimen was obtained precisely.Subsequently,a new energy criterion of coal burst proneness was established,which was called the residual elastic energy index(defined as the difference between the peak elastic strain energy density and post peak failure energy density).Considering the destruction process and actual failure characteristics of coal specimens,the accuracy of evaluating coal burst proneness based on the residual elastic energy index was examined.The results indicated that the residual elastic energy index enables reliable and precise evaluations of the coal burst proneness. | Fengqiang Gong Yunliang Wang Zhiguo Wang Junfeng Pan Song Luo | 2021 | International Journal of Mining Science and Technology2021，31，4： | 16 |
| 2 | Grain-size characteristics of linear dunes on the northern margin of Qarhan Salt Lake, northwestern China显示文摘In order to clarify the formation mechanism of linear dunes on the northern margin of Qarhan Salt Lake, northwestern China, we analyzed the grain-size and sorting parameters of the dune and interdune sands. The surface sands(0–30 mm) from the dune base to the crest of both flanks and interdune corridors were sampled along transects from upwind to downwind through the dune field. The results indicated that the grain-size distribution differed at different positions between and within the dunes. The frequency curve for dune sands mainly showed a bimodal distribution, while the interdune sediments showed a trimodal distribution. The grain size distribution of the linear dunes showed a finer crest pattern, i.e. the crests were composed of sands that were generally finer, better sorted than those of base sands. In addition, at the dune field scale, the dune crest sands were tending to become much finer but sorting became worse along the downwind transects. However, the grain-size parameters of sediments in the interdune corridors showed no clear pattern. The results demonstrated that the grain size and sorting parameters exhibited a systematic change not only at the individual scale but also at the dune field scale. Our results quantitatively estimate the limited role of cohesive sediments on the formation of linear dune under unidirectional wind regime. More attention should be paid to a long-term wind regime observation, internal sedimentary structures and their formation ages. | LI Jiyan DONG Zhibao ZHANG Zhengcai QIAN Guangqiang LUO Wanyin LU Junfeng | 2015 | Journal of Arid Land2015，7，4： | 13 |
| 3 | Silicon photonic platforms for mid-infrared applications [Invited]显示文摘Silicon photonic integrated circuits for telecommunication and data centers have been well studied in the past decade, and now most related efforts have been progressing toward commercialization. Scaling up the silicon-oninsulator(SOI)-based device dimensions in order to extend the operation wavelength to the short mid-infrared(MIR) range(2–4 μm) is attracting research interest, owing to the host of potential applications in lab-on-chip sensors, free space communications, and much more. Other material systems and technology platforms, including silicon-on-silicon nitride, germanium-on-silicon, germanium-on-SOI, germanium-on-silicon nitride, sapphireon-silicon, Si Ge alloy-on-silicon, and aluminum nitride-on-insulator are explored as well in order to realize low-loss waveguide devices for different MIR wavelengths. In this paper, we will comprehensively review silicon photonics for MIR applications, with regard to the state-of-the-art achievements from various device demonstrations in different material platforms by various groups. We will then introduce in detail of our institute's research and development efforts on the MIR photonic platforms as one case study. Meanwhile, we will discuss the integration schemes along with remaining challenges in devices(e.g., light source) and integration. A few application-oriented examples will be examined to illustrate the issues needing a critical solution toward the final production path(e.g., gas sensors). Finally, we will provide our assessment of the outlook of potential futureresearch topics and engineering challenges along with opportunities. | TING HU BOWEI DONG XIANSHU LUO TSUNG-YANG LIOW JUNFENG SONG CHENGKUO LEE GUO-QIANG LO | 2017 | Photonics Research2017，5，5： | 13 |
| 4 | Metal oxide and hydroxide nanoarrays: Hydrothermal synthesis and applications as supercapacitors and nanocatalysts显示文摘The development of nanotechnology in recent decades has brought new opportunities in the exploration of new materials for solving the issues of fossil fuel consumption and environment pollution.Materials with nano-array architecture are emerging as the key due to their structure advantages,which offer the possibility to fabricate high-performance electrochemical electrodes and catalysts for both energy storage and effcient use of energy.The main challenges in this feld remain as rational structure design and corresponding controllable synthesis.This article reviews recent progress in our laboratory related to the hydrothermal synthesis of metal oxide and hydroxide nanoarrays,whose structures are designed aiming to the application on supercapacitors and catalysts.The strategies for developing advanced materials of metal oxide and hydroxide nanoarrays,including NiO,Ni(OH)2,Co3O4,Co3O4@Ni–Co–O,cobalt carbonate hydroxide array,and mixed metal oxide arrays like Co3 xFex O4and Znx Co3 xO4,are discussed.The different kinds of structure designs such as 1D nanorod,2D nanowall and hierarchical arrays were involved to meet the needs of the high performance materials.Finally,the future trends and perspectives in the development of advanced nanoarrays materials are highlighted. | Qiu Yang Zhiyi Lu Junfeng Liu Xiaodong Lei Zheng Chang Liang Luo Xiaoming Sun | 2013 | Progress in Natural Science:Materials International2013，23，4： | 9 |
| 5 | Wide-steering-angle high-resolution optical phased array显示文摘Optical phased array(OPA)technology is considered a promising solution for solid-state beam steering to supersede the traditional mechanical beam steering.As a key component of the LIDAR system for long-range detection,OPAs featuring a wide steering angle and high resolution without beam aliasing are highly desired.However,a wide steering range requires a waveguide pitch less than half of the wavelength,which is easily subjected to cross talk.Besides,high resolution requires a large aperture,and it is normally achieved by a high count number of waveguides,which complicates the control system.To solve the mentioned issues,we design two high-performance 128-channel OPAs fabricated on a multilayered SiN-on-SOI platform.Attributed to the nonuniform antenna pitch,only 128 waveguides are used to achieve a 4 mm wide aperture.Besides,by virtue of innovative dual-level silicon nitride(Si_(3)N_(4))waveguide grating antennas,the fishbone antenna OPA achieves a 100°×19.4°field of view(FOV)with divergence of 0.021°×0.029°,and the chain antenna OPA realizes a 140°×19.23°FOV with divergence of 0.021°×0.1°.To our best knowledge,140°is the widest lateral steering range in two-dimensional OPA,and 0.029°is the smallest longitudinal divergence.Finally,we embed the OPA into a frequency-modulated continuous-wave system to achieve 100 m distance measurement.The reflected signal from 100 m distance is well detected with 26 dBm input transmitter power,which proves that OPA serves as a promising candidate for transceiving optical signal in a LIDAR system. | YINGZHI LI BAISONG CHEN QUANXIN NA QIJIE XIE MIN TAO LANXUAN ZHANG ZIHAO ZHI YUXUAN LI XIAOBIN LIU XIANSHU LUO GUOQIANG LO FENGLI GAO XUEYAN LI JUNFENG SONG | 2021 | Photonics Research2021，9，12： | 7 |
| 6 | Pattern analysis of a linear dune field on the northern margin of Qarhan Salt Lake,northwestern China显示文摘In terms of formation mechanisms of linear dunes,there are open arguments for their widespread distribution and multi-morphological diversities.In order to clarify the formation mechanism of linear dunes of Qarhan Salt Lake,we used pattern analysis method to analyze the statistical characteristics and spatial variation of their pattern parameters.Except at the west-northwest margin,the pattern parameters showed regular spatial variation from the up-middle part towards the downwind end of the dune field.Based on the cumulative probability plots for inter-crest spacing and crest length,we divided the linear dunes into three groups,which corresponding to the three evolution stages of these dunes.The first group comprises erosional relics,with shorter crests,smaller inter-crest spacing and more random dune orientation.The second group comprises dunes whose sand supply is just sufficient to maintain stability and these dunes are approaching the net erosion stage.The crest length and inter-crest spacing of these dunes are much larger than those of the first group,and dune orientation is closer to the resultant drift direction (RDD) .The last group comprises linear dunes that are still undergoing vertical accretion and longitudinal elongation,which follows the RDD of the modern wind regime.The presence of regular spatial variation of pattern parameters and a similar geometry with the vegetated linear dunes suggest that deposition and erosion coexist in the development and evolution of linear dunes of Qarhan Salt Lake,i.e.deposition predominates at the downwind end of linear dunes in the vertical accretion and longitudinal elongation stage,whereas erosion mainly occurs at the upwind end of linear dunes in the degradation stage.Therefore,the formation mechanism of linear dunes in Qarhan Salt Lake can be reasonably explained by the combination of depositional and erosional theories. | LI Jiyan DONG Zhibao QIAN Guangqiang ZHANG Zhengcai LUO Wanyin LU Junfeng WANG Meng | 2016 | Journal of Arid Land2016，8，5： | 6 |
| 7 | Oxidation of NO over cobalt oxide supported on mesoporous silica显示文摘Cobalt oxide catalysts supported on mesoporous silica(Co3O4 /MPS) were prepared,characterized and applied for catalytic oxidation of NO. Effects of catalyst supports,calcination temperatures,H2O and SO2 on NO conversion were investigated. The samples were also characterized by BET,XRD,FTIR and TG/DTG. The results suggested that Co3O4 /MPS catalyst calcined at 573 K had the smallest crystal particles and the best surface dispersion. This catalyst had the highest activity and yielded 82% NO conversion at 573 K,at a space velocity of 12000 h 1 . Although the conversion of NO decreased with the introduction of H2O,it could be restored completely after removing residual H2O from Co3O4 /MPS catalyst by heating at 573 K. In the presence of SO2,the oxidation activity decreased and CoSO 4 was detected on the catalyst. The NO conversion decreased to 30.2% in the presence of SO2 and H2O. It could not be restored completely after cutting off H2O and SO2 . The deactivation of the catalyst in the presence of SO2 and H2O was attributed to the formation of cobalt sulfate species. | Yan Huang Dongmei Gao Zhiquan Tong Junfeng Zhang He Luo | 2009 | Journal of Natural Gas Chemistry2009，18，4： | 5 |
| 8 | NUMERICAL SIMULATION OF CHARGED GAS-LIQUID TWO PHASE JET FLOW IN ELECTROSTATIC SPRAYING显示文摘Multi-fluid k-e-kp, two phase turbulence model is used to simulate charged gas-liquid two phase coaxial jet, which is the transorting flow field in electrostatic spraying. Compared with the results of experiment, charged gas-liquid two-phase turbulence can be well predicted by this model. | Wang Ze,Jin Hanhui,Wang Junfeng,Luo Tiqian (School of Energy and Power,Jiangsu University of Science and Technology) | 2001 | Chinese Journal of Mechanical Engineering2001，14，3： | 5 |
| 9 | A Real-Time System for Monitoring Distant Dynamic Displacement of Structures显示文摘把技术基于数字图象处理,一个即时系统被开发监视并且检测设计结构的动态排水量。由用一个自我规划的软件处理图画,在某个坐标系统的一个目标的即时坐标能也被获得,并且推进动态排水量数据和目标罐头的曲线被完成。数据的也就是说自动的聚会并且即时处理能被这个系统同时执行。首先,为这个系统,一种未触动过的监视技术被采用,罐头它监视或检测目标几到几百米分开;第二,它有灵活安装状况和亚毫米度的好监视精确;第三,它是合适的为动态、伪动态、静态大工程结构监视。通过大桥的几测试和应用程序,系统的好可靠性和优势被证明。 | CHEN Junfeng ZHAO Wenguang LUO Hongbin LI Penghui WEN Yinping | 2008 | Geo-Spatial Information Science2008，11，1： | 4 |
| 10 | Land use and land cover change and its driving forces in Maqu County, China in the past 25 years显示文摘LUCC;;driving forces;;Maqu County;;source region of the Yellow | JunFeng Lu ZhiBao Dong GuangYin Hu WenJin Li WanYin Luo MingLiang Tan | 2016 | Research in Cold and Arid Regions2016，8，5： | 4 |
| 11 | Tuning PID Parameters Based on a Combination of the Expert System and the Improved Genetic Algorithms显示文摘联合一个专家系统和改进基因算法的新策略为调节 proportional-integral-derivative (PID ) 被介绍为石油化学的进程的参数。这保留全球最佳的基因算法,也就是快速的集中和成就的优点。一个直角的实验方法的利用解决基因因素的决心。有一个专家系统的联合能做植物操作员的实际经验的最好的使用。典型进程系统例子的模拟结果显示出好控制表演和坚韧性。 | Zuo Xin Zhang Junfeng Luo Xionglin | 2005 | Petroleum Science2005，2，4： | 3 |
| 12 | Novel high voltage RESURF Al GaN/GaN HEMT with charged buffer layer显示文摘A novel reduced surface field (RESURF) Al GaN /GaN high electron mobility transistor(HEMT)with charged buffer layer is proposed. Its breakdown mechanism and on-state characteristics are investigated.The HEMT features buried Fluorine ions in the GaN buffer layer both under the Drift and the Gate region (FDG). The section of FDG under the drift region (FD) not only reduces the electric field (E-field) peak at the gate edge but also enhances the E-field in the drift region by the assisted depletion, leading to a significant improvement in breakdown voltage (BV). Moreover, the section of FDG under the gate (FG) enhances the back barrier and effectively prevents electron injecting from the source to form leakage current, thus a higher BV is achieved. The BV of the proposed HEMT sharply increases to 750 V from 230 V of conventional AlGaN /GaN HEMT with the same dimensional parameters, and the specific on-resistance (Ron,sp) just increases to1.21 m?·cm^2from 1.01 m?·cm^2. | Jiayun XIONG Chao YANG Jie WEI Junfeng WU Bo ZHANG Xiaorong LUO | 2016 | Science China(Information Sciences)2016，59，4： | 2 |
| 13 | Exposure to bifenthrin disrupts the development of testis in male Sebastiscus marmoratus显示文摘Bifenthrin(BF) is a pyrethroid insecticide that is widely used in agriculture, horticulture, and for residential purposes. However, few studies addressing the reproductive toxicity of BF on fishes are available. The present study was conducted to investigate the effects of BF on testicular development in Sebastiscus marmoratus and to gain insight into its mechanism. After exposure to 1, 10 and 100 ng/L BF for 50 days, there was a reduced number of mature sperm and an abundance of the late stages of spermatocysts in the testes. The levels of 17β-estradiol and testosterone were decreased significantly after BF exposure. The activity of caspase-3 was increased in a dosedependent manner after BF exposure, TUNEL assay indicated that BF exposure resulted in the occurrence of apoptosis in the testes, which might be main reason for the inhibition of spermatogenesis. | LI Jinshou LUO Fen LIU Liyue RUAN Junfeng WANG Nannan | 2017 | Acta Oceanologica Sinica2017，36，2： | 2 |
| 14 | Paleogeomorphy evolution of the Ordovician weathering crust and its implication for reservoir development,eastern Ordos Basin显示文摘Gas reservoir development of the Ordovician weathering crust in the Ordos Basin is closely controlled by the pre-Carboniferous paleogeomorphy.Previous studies show that the paleogeomorphy is high in the west and low in the east,and the karst highland,karst slope and karst basin are developed from west to east.With further exploration in recent years,many karst breccia that represent strong karstification,are found in the east area which previously is considered to be the Ordovician karst basin.Thus,it is necessary to revaluate controlling factors of karst paleogeomorphy development from a viewpoint of the dynamic paleogeomorphy evolution,to investigate the paleogeomorphy evolution of the Ordovician weathering crust in geological history and guide further research and prediction of development law of reservoir spaces.In order to reconstruct the paleogeomorphy of the weathering crust in the top of Ordovician in the east Ordos Basin,paleogeography,thickness of residual strata and paleokarst characteristics are well studied.The result shows that a wide range of paleokarst highland occurred in the central to east part of Ordos Basin in the early period,and the karst reservoir spaces were formed;but in the late period,the east part of the basin gradually evolved into the paleokarst basin,the current pre-Carboniferous paleogeomorphy was thus formed,and the dissolution reservoir spaces formed in the early period were mostly filled,accordingly the reservoirs were tight.However fracture networks formed by cave collapse connect intercrystalline pores of dolomite,therefore,the reservoirs can still be well preserved locally and are worthy targets for hydrocarbon exploration. | Xinshan Wei Junfeng Ren Junxing Zhao Daofeng Zhang Shunshe Luo Liubin Wei Juanping Chen | 2018 | Petroleum Research2018，3，1： | 2 |
| 15 | Geomorphology of star dunes in the southern Kumtagh Desert, China: control factors and formation显示文摘 | Zhibao Dong Zhengcai Zhang Guangqiang Qian Wanyin Luo Ping Lv Junfeng Lu | 2013 | Environmental Earth Sciences2013，，1： | 2 |
| 16 | Compound Gaoziban tablet(复方高滋斑片) alleviates depression via toll-like receptor 4/myeloid differentiation factor 88/nuclear factor-kappa B pathway显示文摘OBJECTIVE: To evaluate the effect of compound Gaoziban tablet(复方高滋斑片, CGZBT) on depression, and to investigate the underlying mechanism. METHODS: The components of CGZBT were analysed by high-performance liquid chromatography. Then, we assessed the effects of varying doses of CGZBT on an established chronic unpredictable mild stress(CUMS) model in rats. Whether animals were depressed was evaluated by sucrose preference test, open field test and forced swimming test. Neurotransmitters of hippocampus were detected by liquid chromatography-mass spectrometry. Serum levels of tumor necrosis factor-alpha(TNF-α), interleukin(IL)-1β, IL-6, IL-4, and IL-10 were measured by enzyme-linked immunosorbent assay. Expressions of toll-like receptor 4(TLR4), myeloid differentiation factor 88(My D88), phospho-nuclear factorkappa B(p-NF-κB), cyclooxygenase-2(COX-2), ionized calcium binding adapter molecule-1(IBA-1) were assessed by immunohistochemical staining and western blotting. RESULTS: Eight compounds were identified from CGZBT, moreover, our results showed that CGZBT effectively reversed the CUMS-induced decrease in sucrose preference, shortened the movement distance and prolonged immobility time. CGZBT significantly increased levels of 5-hydroxytryptamine, dopamine, norepinephrine, 5-hydroxyindoleacetic acid levels, and reduced the expression of TNF-α, IL-1β, IL-6, yet increased IL-4 and IL-10. Furthermore, the expressions of TLR4, My D88, COX-2, p-NF-κB and IBA-1 in hippocampus were effectively reversed after treatment with CGZBT. CONCLUSIONS: These results indicated that CGZBT could, at least in part, alleviate depression induced by CUMS via the TLR4/My D88/NF-κB pathway, suggesting its potential as an antidepressant drug. | ZOU Xinshuang SHI Lei YIN Hailong LI Haiping WANG Mengheng SONG Wanci LUO Laichun WU Hezhen YANG Yanfang ZAN Junfeng LIU Yanwen DAN Hanxiong YIN Qiang YOU Pengtao | 2022 | Journal of Traditional Chinese Medicine2022，42，6： | 2 |
| 17 | In situ atomic-scale observation of dislocation behaviors in twin-structured Pt nanocrystals显示文摘The deformation mechanisms of twin-structured metallic materials have attracted great interest.Though previous theoretical predictions have suggested that the repulsive force of the twin boundary(TB)can significantly affect the deformation of twinstructured metals,it remains unclear whether this prediction applies to experimental conditions.In this paper,the atomic-scaled deformation process of twin-structured Pt nanocrystals was in situ observed using our home-made device in a high-resolution transmission electron microscope.We have shown that the plastic deformation of the twin-structured Pt nanocrystals was governed by full dislocation generation as well as Lomer dislocation(LD)lock formation and destruction.After LD locks were destructed,these full dislocations tended to move towards the surface of the nanocrystals.The findings revealed that due to the ultra-high repulsive force of TB on dislocation,there was no dislocation-TB reaction during the deformation.These findings can enrich our understanding of the dislocation behaviors of twin-structured nanocrystals. | GUO YiZhong SUN Tao FU LiBo HAO LongHu HUANG Ming WEI RuJian LUO JunFeng HE Xin WANG XingQuan XIONG XiaoDong WANG LiHua HAN XiaoDong | 2021 | Science China(Technological Sciences)2021，64，3： | 2 |
| 18 | Dithiol treatments enhancing the efficiency of hybrid solar cells based on PTB7 and CdSe nanorods显示文摘We report the fabrication of polymer/inorganic hybrid solar cells (HSCs) based on CdSe nanorods (NRs) and the semiconducting polymer PTB7. The power conversion efficiency of HSCs can be significantly enhanced by engineering the polymer/nanocrystal interface with ethanedithiol (EDT) and 1,4-benzenedithiol (1,4-BDT) treatments and reached 2.58% and 2.79%, respectively. These results were preferable to that of a pyridine-coated NR-based device (1.75%). This improvement was attributed to the thiol groups of EDT and 1,4-BDT, which can tightly coordinate the Cd ions to form Cd-thialate on CdSe NR surfaces, thereby effectively passivating the NR surface and reducing the active layer defects. Therefore, the rate of exciton generation and dissociation was enhanced and led to the improvement of the device performance. | Weining Luo Tonggang Jiu Chaoyang Kuang Bairu Li Fushen Lu Junfeng Fang | 2015 | Nano Research2015，8，9： | 2 |
| 19 | Real-time PedestrianDetection and Tracking at Nighttime for Driver-AssistanceSystems显示文摘 | Ge Junfeng Luo Yupin Gyomei T | 2009 | IEEE Transactions on Intelligent TransportationSystems2009，10，2： | 1 |
| 20 | Bletilla striata Polysaccharide Stimulates Inducible Nitric Oxide Synthase and Proinflammatory Cytokine Expression in Macrophages显示文摘 | Huajia Diao Xin Li Jiangning Chen Yi Luo Xi Chen Lei Dong Chunming Wang Chenyu Zhang Junfeng Zhang | 2007 | Journal of Bioscience and Bioengineering2007，，2： | 1 |
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