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| 1 | Structural deformation, metallogenic epoch and genetic mechanism of the Woxi Au-Sb-W deposit, Western Hunan Province, South China显示文摘The remobilization,migration,precipitation,and enrichment of ore-forming elements are closely related to structures.Therefore,detailed regional and ore-field structural analyses are critical for determining the genesis of a mineral deposit.The Jiangnan Orogenic Belt(JOB)is an important gold polymetallic metallogenic belt in South China,which is characterized by multiple periods of gold mineralization in the Paleozoic and Mesozoic.However,the genesis of these gold polymetallic deposits is still not well understood due to a lack of systematic research on the regional geology,ore-controlling structures and metallogenic mechanism.In this study,a detailed structural survey at the surface and in the subsurface tunnels was conducted on the Woxi Au-Sb-W deposit,the genesis of which is relatively controversial among the gold polymetallic deposits in the JOB due to poor structural constraints.In addition,a wolframite U-Pb dating was carried out to further constrain the relationship between structures and mineralization.Based on the results of these studies,together with those from previous studies,it is proposed that the Woxi deposit and surrounding areas likely underwent six periods of regional deformation,which are constrained in time and geodynamic setting.Furthermore,we present a systematic discussion on the roles of ore-controlling structures in the transportation,distribution,and deposition of ore-forming elements and localization of orebodies.According to the wolframite dating results,structural analyses,and previous data,we propose that the Woxi Au-Sb-W deposit was formed in two stages during the Yanshanian:a W(wolframite)-Au mineralization stage at ca.140 Ma and an Au-Sb-W(scheelite)mineralization stage at<130 Ma.These mineralizing events are interpreted to have a tight relationship with tectonic reactivation,and the ore-forming fluids were derived from deep sources,including those of magmatic or metamorphic origins.The Woxi deposit can therefore be classified as an“intracontinental reactivation-type”,and the mineralization is related to lithospheric extension caused by plate retreat,retention,and delamination following the cessation of westward subduction of the Paleo-Pacific Plate beneath the East Asian continent. | Bin LI Deru XU Daoyuan BAI Guoxiang CHI Junfeng DAI Cheng GAO Teng DENG Shaohao ZOU Wen MA Guojian WANG Yuexin LING Guangqian ZENG Yinmin LI | 2022 | Science China Earth Sciences2022，65，12： | 2 |
| 2 | Reactive sintering of B4C-TaB2 ceramics via carbide boronizing:Reaction process, microstructure and mechanical properties显示文摘Carbide boronizing is a promising approach to obtain fine grained boron carbide based ceramics with improved mechanical properties. In this work, reaction process, microstructural characteristics and mechanical properties of BxC-TaB2(x = 3.7, 4.9, 7.1) ceramics were comprehensively investigated via this method. Dense BxC-TaB2 ceramics with refined microstructure were obtained from submicro tantalum carbide and boron powder mixtures at 1800℃/50 MPa/5 min by spark plasma sintering. The stoichiometry of boron carbide was determined from lattice parameters and Raman shift. It was found that uniformly distributed TaB2 grains in the BxC matrix is favor of the densification process and restricting grain growth.Besides, planar defects with high density were observed from the as-formed B7.1 C grains and transient stress was considered to contribute to the densification involved with plastic deformation. Microstructural observations indicate the dissolution of oxygen in the TaB2 lattice and most of the B7.1 C/TaB2 phase boundaries were clean. Owing to the highly faulted structure and finer grain size, as-obtained BxC-TaB2 ceramics exhibit high Vickers hardness(33.3–34.4 GPa at 9.8 N) and relatively high flexural strength ranging from 440 to 502 MPa. | Junfeng Gu Ji Zou Peiyan Ma Hao Wang Jinyong Zhang Weimin Wang Zhengyi Fu | 2019 | Journal of Materials Science & Technology2019，35，12： | 2 |
| 3 | 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 |
| 4 | mtDNA data indicates a single origin for dogs south of Yangtze Rive, less than 16,300 years age, from numerous wplves显示文摘 | Pang Junfeng Kluetsch C Zou Xiaoju | 2009 | Molecular Biology and Evolution2009，26，12： | 1 |
| 5 | Conductive mechanism of polymer/graphite conducting composites显示文摘 | Zou Junfeng Yu Zhongzhen Pan Yuxun | 2002 | Journal of Polymer Science Part B : Polymer Physics2002，40，10： | 1 |
| 6 | A method of estimating the Martian neutral atmospheric density at 130 km, and comparison of its results with Mars Global Surveyor and Mars Odyssey aerobraking observations based on the Mars Climate Database outputs显示文摘Profiles of the Martian dayside ionosphere can be used to derive the neutral atmospheric densities at 130 km,which can also be obtained from the Mars Climate Database(MCD)and spacecraft aerobraking observations.In this research,we explain the method used to calculate neutral densities at 130 km via ionosphere observations and three long-period 130-km neutral density data sets at northern high latitudes(latitudes>60°)acquired through ionospheric data measured by the Mars Global Surveyor(MGS)Radio Occultation Experiment.The calculated 130-km neutral density data,along with 130-km density data from the aerobraking observations of the MGS and Mars Odyssey(ODY)in the northern high latitudes,were compared with MCD outputs at the same latitude,longitude,altitude,solar latitude,and local time.The 130-km density data derived from both the ionospheric profiles and aerobraking observations were found to show seasonal variations similar to those in the MCD data.With a negative shift of about 2×10^10 cm^−3,the corrected 130-km neutral densities derived from MCD v4.3 were consistent with those obtained from the two different observations.This result means that(1)the method used to derive the 130-km neutral densities with ionospheric profiles was effective,(2)the MCD v4.3 data sets generally overestimated the 130-km neutral densities at high latitudes,and(3)the neutral density observations from the MGS Radio Science Experiment could be used to calibrate a new atmospheric model of Mars. | JunFeng Qin Hong Zou YuGuang Ye YongQiang Hao JinSong Wang Erling Nielsen | 2020 | Earth and Planetary Physics2020，4，4： | 1 |
| 7 | A cross-layer adaptive transmission scheme combined with SR-ARQ over correlated fading channels 显示文摘 | XIAO Junfeng ZOU Shihong QIU Jing | 2008 | Computers and Electrical Engineering2008，34，4： | 1 |
| 8 | Structural basis of nucleosome deacetylation and DNA linker tightening by Rpd3S histone deacetylase complex显示文摘In Saccharomyces cerevisiae,cryptic transcription at the coding region is prevented by the activity of Sin3 histone deacetylase(HDAC)complex Rpd3S,which is carried by the transcribing RNA polymerase Ⅱ(RNAPⅡ)to deacetylate and stabilize chromatin.Despite its fundamental importance,the mechanisms by which Rpd3S deacetylates nucleosomes and regulates chromatin dynamics remain elusive.Here,we determined several cryo-EM structures of Rpd3S in complex with nucleosome core particles(NCPs),including the H3/H4 deacetylation states,the alternative deacetylation state,the linker tightening state,and a state in which Rpd3S co-exists with the Hho1 linker histone on NCP.These structures suggest that Rpd3S utilizes a conserved Sin3 basic surface to navigate through the nucleosomal DNA,guided by its interactions with H3K36 methylation and the extra-nucleosomal DNA linkers,to target acetylated H3K9 and sample other histone tails.Furthermore,our structures illustrate that Rpd3S reconfigures the DNA linkers and acts in concert with Hho1 to engage the NCP,potentially unraveling how Rpd3S and Hho1 work in tandem for gene silencing. | Shuqi Dong Huadong Li Meilin Wang Nadia Rasheed Binqian Zou Xijie Gao Jiali Guan Weijie Li Jiale Zhang Chi Wang Ningkun Zhou Xue Shi Mei Li Min Zhou Junfeng Huang He Li Ying Zhang Koon Ho Wong Xiaofei Zhang William Chong Hang Chao Jun He | 2023 | Cell Research2023，33，10： | 1 |
| 9 | Toward accurate link between code and software documentation显示文摘Recovering traceability links between source code and software documentation is an important research topic in software maintenance and software reuse. There have been a lot of research efforts in recovering traceability between documentation and code elements(class, interface, method, etc.), mostly based on program analysis. However, there are still a lot of noise links being established in existing work. In this paper, we propose a novel approach to classifying code elements, occurring in a document, into contextual code elements and salient code elements. As a result, we can filter the noise traceability links between a software document and its contextual code elements and get a higher quality link set. Our classifier is trained based on open source project Lucene's source code and 1899 Stack Overflow answer documents about Lucene.We extract code elements from these documents and represent each of these code elements with a 7-dimension feature vector, then we use a decision-tree-based learning model to classify them as salient or not. In the experiments, we get a precision of 70.7% in recognizing the salient code elements of these documents and get12% improvement compared with Rigby's work. We can filter out 56.5%~69.3% noise traceability links with different thresholds in our classifier. It can improve the quality of traceability links between source code and their related software documents in application. | Yingkui CAO Yanzhen ZOU Yuxiang LUO Bing XIE Junfeng ZHAO | 2018 | Science China(Information Sciences)2018，61，5： | 0 |
| 10 | Sulfur vacancies-doped Sb_(2)S_(3) nanorods as high-efficient electrocatalysts for dinitrogen fixation under ambient conditions显示文摘Tuning surface electron transfer process by sulfur(S)-vacancies engineering is an efficient strategy to develop high-efficient catalysts for electroreduction N_(2) reaction(NRR). Herein, the distinct Sb_(2)S_(3) nanorods with S-vacancies(Sv-Sb_(2)S_(3)) have been synthesized by a simple twostep method including hydrothermal and hydrogenation in H_(2)/Ar atmosphere, which shows improved performance for NRR with the NH_(3) yield rate of 10.85 μg h^(-1) mgcat^(-1) at-0.4 V vs. RHE, the faradaic efficiency(FE) of 3.75% at -0.3 V vs. RHE and excellent stability for 24 h, largely outperforming bulk Sb_(2)S_(3). X-ray photoelectron spectroscopy(XPS) and density function theory(DFT) calculations demonstrate that the abundant S-vacancies can create an electron-deficient environment and modulate the electron delocalization in Sv-Sb_(2)S_(3), which can not only facilitate the N_(2) molecule adsorption, but also activate the N≡N, resulting in the enhanced performance for NRR. | Xuyan Wang Jianwei Bai Yantao Wang Xiaoying Lu Zehua Zou Junfeng Huang Cailing Xu | 2022 | Green Energy & Environment2022，7，4： | 0 |
| 11 | A cross-type imaging electron spectrometer显示文摘Energetic electron measurement is of great significance to theoretical space physics research and space weather applications.Current energetic electron detectors must cooperate with a spin-stabilized satellite platform to achieve high angular resolution in pitch angle distribution and three-dimensional(3D)imaging measurement of energetic electrons.This article introduces a cross-type quasi-3D imaging electron spectrometer(IES)based on pinhole imaging technology developed in the laboratory.The imager is composed of five imaging units,including a nine-pixel area array Si-PIN detector imaging unit in the middle and four three-pixel linear array Si-PIN detector imaging units placed in a cross-shape around it.The combination of five imaging units forms two orthogonal nine-pixel linear array detectors(with a common pixel in the middle).There are four pixels with a view angle of 20°×20°in the 45°oblique directions of the cross-type detection array.There are 21 imaging pixels in the entire crosstype sensor head,corresponding to 21 directions.Two multichannel integrated preamplifier ASICs are integrated in the sensor head to realize particle signal readout from 21 pixels.With a back-end electronics system,each pixel can achieve high energy resolution detection of 50–600 keV electrons.Radioactive sources and electron accelerators are used to calibrate the cross-type imaging sensor head,and the results demonstrate its good energy and directional detection characteristics(the energy resolution reaches 6.9 keV for the incident 200 keV electron beam).We performed simulations on the imaging sensor head’s ability to measure the electron pitch angle distribution on the three-axis stabilized platform,and the results show that the sensor head can perform quasi-three-dimensional detection of electrons incident within 2πsolid angles on the three-axis stabilized satellite platform,with an average angular resolution of the electron pitch angle distribution of less than 6°. | YE YuGuang ZOU Hong WANG YongFu QIN JunFeng SHI WeiHong ZOU JiQing ZHONG WeiYing ZONG QiuGang FU SuiYan | 2023 | Science China(Technological Sciences)2023，66，3： | 0 |
| 12 | Comb-based photonic neural population for parallel and nonlinear processing显示文摘It is believed that neural information representation and processing relies on the neural population instead of a single neuron.In neuromorphic photonics,photonic neurons in the form of nonlinear responses have been extensively studied in single devices and temporal nodes.However,to construct a photonic neural population(PNP),the process of scaling up and massive interconnections remain challenging considering the physical complexity and response latency.Here,we propose a comb-based PNP interconnected by carrier coupling with superior scalability.Two unique properties of neural population are theoretically and experimentally demonstrated in the comb-based PNP,including nonlinear response curves and population activities coding.A classification task of three input patterns with dual radio-frequency(RF) tones is successfully implemented in a time-efficient manner,which allows the comb-based PNP to make effective use of the ultra-broad bandwidth of photonics for parallel and nonlinear processing. | BOWEN MA JUNFENG ZHANG WEIWEN ZOU | 2022 | Photonics Research2022，10，1： | 0 |
| 13 | Novel approach to synthesizing poly(propylene)-graft-poly(styrene) (PP-g-PS)显示文摘A novel synthetic route used for preparing PP-g-PS was designed. With this synthetic route, a series of graft copolymers with different contents of PS chain were synthesized successfully, and characterized by 13C-NMR, DSC, GPC. | LI Ze ZOU Junfeng LU Yingying KE Yucai ZHOU Nai HU Youliang | 2003 | Chinese Science Bulletin2003，48，12： | 0 |
| 14 | Bias-Independent Inter-Modulation Method for Simultaneously Measuring Low-Frequency Modulation and Bias Half-Wave Voltages of Mach-Zehnder Modulators显示文摘A bias-independent inter-modulation method is proposed and demonstrated for measuring low-frequency modulation and bias half-wave voltages of Mach-Zehnder modulators(MZMs).The method consists of simultaneous sinusoidal modulation on the modulation and bias ports of the MZM under test.Sinusoidal-modulated sidebands heterodyne with each other and generate the desired inter-modulation products after photodetection,which allows extracting both the modulation depth and half-wave voltage for the modulation and bias ports of the MZM.Our method is independent of bias voltages of the MZM,which can be canceled out by carefully choosing the sinusoidal-modulation frequencies.Moreover,the proposed method enables the low swing voltage for measuring both the modulation depth and half-wave voltage of MZMs.Experiments indicate that the proposed method features the simple setup and high accuracy for low-frequency response measurement ranging from 1 Hz to 1 MHz. | Junfeng ZHU Xinhai ZOU Ying XU Yutong HE Yali ZHANG Zhiyao ZHANG Shangjian ZHANG Yong LIU | 2023 | Photonic Sensors2023，13，2： | 0 |
| 15 | Effects of Long-term K Fertilizer Application on the Crop Yield and K Distribution of Soil Aggregates in a Paddy-Upland Rotation System显示文摘[Objective]A long-term paddy-upland experiment was conducted to evaluate the effects of the recommended amount of potassium( K)fertilizer on crop yield,distribution of soil aggregate,and soil available K content. It was mainly to ascertain the distribution of K in the soil aggregate components in the paddy-upland rotation system,and then to provide theoretical basis for soil structure improvement,K pool management,and reasonable application of K fertilizer. [Method]There were 2 treatments selected,namely,NP(-K) treatment and NPK( + K) treatment in this study. Then the effects of K fertilizer application on the yield,available K content,and aggregate distribution in the middle rice-winter rape rotation system were analyzed. [Result]The results showed that the output of the crop rotation was affected by the year and fertilization. Compared with NP(-K),the average yield increases of rice and winter rape after application of K fertilizer were 0.51 and 0.33 t/hm2,with the increments of 7.5%and 14. 1% respectively. The long-term application of K fertilizer( 7 a) had no significant effects on the distribution of soil aggregates but could significantly increase the water-soluble K content and available K content at depths of 20-30 and 30-40 cm,and available K content of aggregates in each particle size. In addition,the balance of available K at the 10-20 and 30-40 cm of soil layers was the most significant through calculation of surplus-deficit value of available K in agglomerates of different soil layers. [Conclusion]Compared with the initial available K content in the farmland in 2011,the current K fertilizer application could lead to that farmland K content continues to decline. Therefore,we should pay attention to straw returned and supplement of organic K fertilizer,to maintain crop rotation system's productivity and soil K balance. | Song Meifang Hu Yitao Huang Shuai He Junfeng Chen Fowen Zou Jialong Li Jifu | 2019 | Meteorological and Environmental Research2019，10，1： | 0 |
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