|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Enhanced magnetic properties in chemically inhomogeneous Nd-Dy-Fe-B sintered magnets by multi-main-phase process显示文摘Homogeneous substitution of Dy for Nd in the hard magnetic 2:14:1 phase can effectively enhance coercivity to ensure the high temperature operation,however,inevitably deteriorate remanence at expense.In this work,we performed a comparative investigation of the two magnets prepared by multimain-phase(co-sintering Nd_(2)Fe_(14)B and(Nd,Dy)_(2)Fe_(14)B powders)and single-main-phase(sintering(Nd,Dy)_(2)Fe_(14)B powders)approaches.The comparative investigation reveals that at the same Dy substitution level(2.16 wt%),such chemically inhomogeneous multi-main-phase magnet possesses better roomtemperature magnetic properties as well as thermal stability than those of the single-main-phase one with homogenous Dy distribution in the matrix grains.Room-temperature magnetic properties H_(Cj)=1664 kA/m,B_(r)=1.33 T and(BH)_(max)=350.4 kJ/m^(3)for the multi-main-phase magnet are all better than those for the single-main-phase magnet with H_(Cj)=1536 kA/m,B_(r)=1.29 T and(BH)_(max)=318.4 kj/m^(3).In addition,over the temperature range from 295 to 423 K,both the temperature coefficients of coercivity and remanence for the multi-main-phase magnet are also lower than that for the single-main-phase magnet.Such superior magnetic performance is attributed to the short-range magnetic interactions inside individual 2:14:1 phase grains and the long-range magnetostatic interactions between adjacent grains with inhomogeneous Dy distribution.Our work provides a feasible approach of enhancing coercivity and retaining energy product simultaneously in the Nd-Dy-Fe-B permanent magnets. | Xiaolian Liu Mengjie Pan Pei Zhang Tianyu Ma Lizhong Zhao Lingwei Li | 2021 | Journal of Rare Earths2021，39，5： | 5 |
| 2 | Numerical Simulation of Characteristics of CEX Ions in Ion Thruster Optical System显示文摘Charge exchange(CEX) ions could inflict severe damages on the ion thruster optical system.This article is aimed at investigating the characteristics of the CEX ions and their influences upon the optical system by means of particle-incell(PIC) ion simulation and Monte Carlo collision(MCC) methods.The results from numerical simulation indicate that despite the fact that CEX ions appear in the entire beamlet region near the ion optical system,the ones that present themselves downstream of the accelerator grid have good reason for attracting more attention.As their trajectories are significantly affected by the local electric field,a great number of CEX ions are accelerated toward grids resulting in sputtering erosion.When the influences of the CEX ions are considered in the numerical simulation,there could hardly be observed augments in the screen grid current,but the accelerator grid current increases from zero to 1.4% of the beamlet current.It can be understood from the numerical simulation that the CEX ions formed in the region far downstream of the accelerator grid should be blamed for the erosion on the downstream surface of the accelerator grid. | Zhong Lingwei Liu Yu Li Juan Gu Zuo Jiang Haocheng Wang Haixing Tang Haibin | 2010 | Chinese Journal of Aeronautics2010，23，1： | 5 |
| 3 | Amoxicillin effects on functional microbial community and spread of antibiotic resistance genes in amoxicillin manufacture wastewater treatment system显示文摘This study aimed to reveal how amoxicillin(AMX) affected the microbial community and the spread mechanism of antibiotic resistance genes(ARGs) in the AMX manufacture wastewater treatment system. For this purpose, a 1.47 L expanded granular sludge bed(EGSB) reactor was designed and run for 241 days treating artificial AMX manufacture wastewater. 454 pyrosequencing was applied to analyze functional microorganisms in the system. The antibiotic genes OXA_(-1), OXA_(-2), OXA_(-10), TEM_(-1), CTX-M_(-1), class I integrons(intI1) and 16 SrRNA genes were also examined in sludge samples. The results showed that the genera Ignavibacterium, Phocoenobacter,Spirochaeta, Aminobacterium and Cloacibacillus contributed to the degradation of different organic compounds(such as various sugars and amines). And the relative quantification of eachβ-lactam resistance gene in the study was changed with the increasing of AMX concentration.Furthermore the vertical gene transfer was the main driver for the spread of ARGs rather than horizontal transfer pathways in the system. | Lingwei Meng Xiangkun Li Xinran Wang Kaili Ma Gaige Liu Jie Zhang | 2017 | Journal of Environmental Sciences2017，29，11： | 5 |
| 4 | Processes of dike-break induced flows:A combined experimental and numerical model study显示文摘Dike breaking is a disaster that could cause extensive damage. It could lead to flood flows outside the dike and induce water level fluctuations in the main channel. Numerical models are increasingly used to simulate flood flows due to dike-break, because direct observations from field surveys and physical models are rather limited. Existing knowledge concerning dam-break flows cannot be applied directly to dike-break flows because the effect of channel discharge cannot be neglected in the latter. In this study,physical experiments are done in a large laboratory flume to simulate the process of dike-break induced flood wave propagation in the floodplain and flow fluctuations in the main channel. The variations of water levels and velocities are measured and recorded using an array of pressure sensors and two acoustic Doppler velocimetry devices. A numerical model has been set up according to the experimental layout. The experiments have high repeatability and the numerical model predictions agree closely with the physical model data. The experimental results provide reliable information for improving the understanding of dike-break flow dynamics and for the verification of numerical models. | Jian Sun Lingwei Lu Binliang Lin Lu Liu | 2017 | International Journal of Sediment Research2017，32，4： | 4 |
| 5 | Predicament and Countermeasure Analysis of Intellectual Property Management for Strategic Emerging Industry显示文摘Intellectual property is the core support and important driving force for the sound development of strategic emerging industry. This paper makes an analysis on the current predicament of intellectual property management for strategic emerging industry from the four stages of the process,including creation and development management,business management,revenue management and disposal management on intellectual property,and finally explores the solutions and gives some countermeasures. | Zhang Lingwei Liu Dunhu | 2014 | 学术界2014，，7： | 2 |
| 6 | Photothermal and pH dual-responsive self-healing coating for smart corrosion protection显示文摘A novel self-healing coating with photothermal and pH dual-responsive properties has been designed to protect carbon steel against corrosion by loading the stimuli-responsive microcapsules into a shape memory epoxy coating. The sandwich-like microcapsules were based on reduced graphene oxide/mesoporous silica(r GO@MS) assembled with a p H-responsive poly(N,N-dimethylaminoethyl methacrylate)(PDMAEMA) layer, and were loaded with benzotriazole(BTA) inhibitors(abbreviated as rGO@MS-P-BTA). Under near-infrared(NIR) light irradiation, the prominent photothermal effect of rGO could not only elevate the coating temperature to activate the shape memory effect and close the coating scratch, but also facilitate the release of corrosion inhibitors to suppress the corrosion activity. Moreover,the PDMAEMA as a p H-driven “gatekeeper” realized the controlled release of BTA from microcapsules at acid conditions. The surface morphology analysis, electrochemical impedance spectroscopy(EIS), and scanning electrochemical microscopy(SECM) were performed to evaluate the self-healing performance of the composite coatings. The results showed that the combination of NIR light and p H-responsive selfhealing effects endowed the coating with short healing time and prominent healing efficiency. | Yao Huang Panjun Wang Weimin Tan Wenkui Hao Lingwei Ma Jinke Wang Tong Liu Fan Zhang Chenhao Ren Wei Liu Dawei Zhang | 2022 | Journal of Materials Science & Technology2022，，12： | 2 |
| 7 | Recent Developments of FNET/GridEye—A Situational Awareness Tool for Smart Grid显示文摘Wide-area monitoring systems(WAMS)are becoming increasingly vital for enhancing power grid operators’situational awareness capabilities.As a pilot WAMS that was initially deployed in 2003,the frequency monitoring network FNET/GridEye uses GPS-time-synchronized monitors called frequency disturbance recorders(FDRs)to capture dynamic grid behaviors.Over the past ten years,a large number of publications related to FNET/GridEye have been reported.In this paper,the most recent developments of FNET/GridEye sensors,data centers,and data analytics applications are reviewed.These works demonstrate that FNET/GridEye will become a costeffective situational awareness tool for the future smart grid. | Yong Liu Wenxuan Yao Dao Zhou Ling Wu Shutang You Hesen Liu Lingwei Zhan Jiecheng Zhao Haoyang Lu Wei Gao Yilu Liu | 2016 | CSEE Journal of Power and Energy Systems2016，2，3： | 2 |
| 8 | The Overseas Reception of Chinese Science Fiction Works from a Perspective of Western Interpretation Preference——A Case Study of Reader's Reception of Liu Cixin's The Three-Body Problem in the USA显示文摘The Three-Body Problem, written by Liu Cixin, won the 2015 Hugo Award for Best Novel, with over 200,000 copies in English already sold. This gure is hundreds of times the average sales volume of Chinese novels in the USA. Through qualitative and quantitative analyses of overseas readers' comments on The Three-Body Problem posted on the online platforms of Goodreads and Amazon, this paper concludes that the novel's success overseas lies in its catering to the concerns of overseas readers. The ThreeBody Problem is popular among overseas readership thanks to its re ection on the ultimate existence of mankind, science ction vision & imagination, literary familiarity & identi cation, ideological di erence-triggered cultural curiosity, and a good translation. This paper attempts to interpret Liu Cixin's work on the map of world literature from the perspective of overseas readers' preferences to provide references for contemporary Chinese science ction creation and overseas reception. | Liu Ge Li Yun Wu Lingwei | 2018 | Contemporary Social Sciences2018，3，6： | 1 |
| 9 | Erianin suppresses constitutive activation of MAPK signaling pathway by inhibition of CRAF and MEK1/2显示文摘Constitutive activation of RAS-RAF-MEK-ERK signaling pathway(MAPK pathway)frequently occurs in many cancers harboring RAS or RAF oncogenic mutations.Because of the paradoxical activation induced by a single use of BRAF or MEK inhibitors,dual-target RAF and MEK treatment is thought to be a promising strategy.In this work,we evaluated erianin is a novel inhibitor of CRAF and MEK1/2 kinases,thus suppressing constitutive activation of the MAPK signaling pathway induced by BRAF V600E or RAS mutations.KinaseProfiler enzyme profiling,surface plasmon resonance(SPR),isothermal titration calorimetry(ITC),cellular thermal shift assay,computational docking,and molecular dynamics simulations were utilized to screen and identify erianin binding to CRAF and MEK1/2.Kinase assay,luminescent ADP detection assay,and enzyme kinetics assay were investigated to identify the efficiency of erianin in CRAF and MEK1/2 kinase activity.Notably,erianin suppressed BRAF V600E or RAS mutant melanoma and colorectal cancer cell by inhibiting MEK1/2 and CRAF but not BRAF kinase activity.Moreover,erianin attenuated melanoma and colorectal cancer in vivo.Overall,we provide a promising leading compound for BRAF V600E or RAS mutant melanoma and colorectal cancer through dual targeting of CRAF and MEK1/2. | Penglei Wang Xuechao Jia Bingbing Lu Han Huang Jialin Liu Xuejiao Liu Qiong Wu Yamei Hu Pan Li Huifang Wei Tingting Liu Dengyun Zhao Lingwei Zhang Xueli Tian Yanan Jiang Yan Qiao Wenna Nie Xinli Ma Ruihua Bai Cong Peng Zigang Dong Kangdong Liu | 2023 | Signal Transduction and Targeted Therapy2023，8，4： | 1 |
| 10 | Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas显示文摘This work employed an inductively coupled plasma wind tunnel to study the dynamic oxidation mechanisms of carbon fiber reinforced SiC matrix composite(C_(f)/SiC)in high-enthalpy and high-speed plasmas.The results highlighted a transition of passive/active oxidations of SiC at 800–1600℃and 1–5 kPa.Specially,the active oxidation led to the corrosion of the SiC coating and interruption of the SiO_(2) growth.The transition borders of active/passive oxidations were thus defined with respect to oxidation temperature and partial pressure of atomic O in the high-enthalpy and high-speed plasmas.In the transition and passive domains,the SiC dissipation was negligible.By multiple dynamic oxidations of C_(f)/SiC in the domains,the SiO_(2) thickness was not monotonously increased due to the competing mechanisms of passive oxidation of SiC and dissipation of SiO_(2).In addition,the mechanical properties of the SiC coating/matrix and the C_(f)/SiC were maintained after long-term dynamic oxidations,which suggested an excellent thermal stability of C_(f)/SiC serving in thermal protection systems(TPSs)of reusable hypersonic vehicles. | Lingwei YANG Xueren XIAO Liping LIU Jie LUO Kai JIANG Xinxing HAN Changhao ZHAO Jun ZHANG Guolin WANG | 2022 | Journal of Advanced Ceramics2022，11，2： | 1 |
| 11 | Anti-PD-L1 antibody enhances curative effect of cryoablation via antibody-dependent cell-mediated cytotoxicity mediating PD-L1^(high)CD11b^(+)cells elimination in hepatocellular carcinoma显示文摘Cryoablation(CRA)and microwave ablation(MWA)are two main local treatments for hepatocellular carcinoma(HCC).However,which one is more curative and suitable for combining with immunotherapy is still controversial.Herein,CRA induced higher tumoral PD-L1 expression and more T cells infiltration,but less PD-L1^(high)CD11b^(+)myeloid cells infiltration than MWA in HCC.Furthermore,CRA had better curative effect than MWA for anti-PD-L1 combination therapy in mouse models.Mechanistically,anti-PD-L1 antibody facilitated infiltration of CD8^(+)T cells by enhancing the secretion of CXCL9 from cDC1 cells after CRA therapy.On the other hand,anti-PD-L1 antibody promoted the infiltration of NK cells to eliminate PD-L1^(high)CD11b^(+)myeloid cells by antibody-dependent cell-mediated cytotoxicity(ADCC)effect after CRA therapy.Both aspects relieved the immunosuppressive microenvironment after CRA therapy.Notably,the wild-type PD-L1 Avelumab(Bavencio),compared to the mutant PD-L1 atezolizumab(Tecentriq),was better at inducing the ADCC effect to target PD-L1^(high)CD11b^(+)myeloid cells.Collectively,our study uncovered the novel insights that CRA showed superior curative effect than MWA in combining with anti-PD-L1 antibody by strengthening CTL/NK cell immune responses,which provided a strong rationale for combining CRA and PD-L1 blockade in the clinical treatment for HCC. | Jizhou Tan Ting Liu Wenzhe Fan Jialiang Wei Bowen Zhu Yafang Liu Lingwei Liu Xiaokai Zhang Songling Chen Haibiao Lin Yuanqing Zhang Jiaping Li | 2023 | Acta Pharmaceutica Sinica B2023，13，2： | 0 |
| 12 | Quantitative reorientation behaviors of macro-twin interfaces in shape-memory alloy under compression stimulus in situ TEM显示文摘Twinning stress is known to be a critical factor for the actuating performance of magnetic shape memory alloys because of the harmful deterioration of their magnetic field-induced strain effect.However,the intrinsic origin of the high twinning stress is still in debate.In this work,we firstly fill this gap by precisely probing the reorientation behaviors of A-C and A-B two common macro-twin interfaces under the stimulus of uniaxial compression in-situ transmission electron microscope.The grain boundary is proved to be the main reason for large twinning stress.The twinning stress of the A-C and A-B type interfaces quantitatively are~0.69 and 1.27 MPa within the plate respectively.The A-C type interface evidently has smaller twinning stress and larger deformation variable than the A-B interface.Under the action of compression,not only the orientations of the crystals have changed,but also the roles of the major and minor lamellae have changed for both interfaces due to the movements of twinning dislocations.Combining insitu and quasi in-situ electron diffraction data,the reorientation process is clearly and intuitively shown by the stereographic projection.Atomic models and the theory of dislocation motion are proposed to phenomenologically clarify the intrinsic mechanism.This work is believed to not only provide a deeper understanding of the deformation mechanism of magnetic shape memory alloys under uniaxial compression testing,but also discover that compression training is not the mechanical training way to decrease the twinning stress of non-modulated martensite in single crystal shape memory alloys. | Bin Chen Chaoshuai Guan Yong Li Chong Yang Junwei Zhang Gang Liu Lingwei Li Yong Peng | 2022 | Journal of Materials Science & Technology2022，，12： | 0 |
| 13 | Chinese Experience in Industrial Development During the Forty Years of reform and opening-up显示文摘Over the past forty years of reform and opening-up,China's industry has sustained rapid and sound development and generated impressive achievements.Industrialization has entered the second half of its final stage.This experience of successful industrialization with Chinese characteristics constitutes an important component Chinese wisdom and Chinese approaches,and serves as a reference for other developing countries and countries in transition.The Chinese experience in industrial development during this period includes: progressively promoting industrial and economic system reform adapted to local circumstances; seizing the right moment to firmly integrate into the global system of labor division; pursuing the new path of industrialization featuring coordinated development of the 'Five Pillars' in keeping up with the times; and developing an industrialization model with Chinese characteristics with concerted efforts of effective market and enabling government. | Liu Yanhong Guo Chaoxian Cui Min Wu Lingwei | 2018 | Contemporary Social Sciences2018，3，5： | 0 |
| 14 | The Protocol of Ultrasonic Backscatter Measurements of Musculoskeletal Properties显示文摘This study aims to introduce the protocol for ultrasonic backscatter measurements of musculoskeletal properties based on a novel ultrasonic backscatter bone diagnostic(UBBD)instrument.Dual-energy X-ray absorptiometry(DXA)can be adopted to measure bone mineral density(BMD)in the hip,spine,legs and the whole body.The muscle and fat mass in the legs and the whole body can be also calculated by DXA body composition analysis.Based on the proposed protocol for backscatter measurements by UBBD,ultrasonic backscatter signals can be measured in vivo,deriving three backscatter parameters[apparent integral backscatter(AIB),backscatter signal peak amplitude(BSPA)and the corresponding arrival time(BSPT)].AIB may provide important diagnostic information about bone properties.BSPA and BSPT may be important indicators of muscle and fat properties.The standardized backscatter measurement protocol of the UBBD instrument may have the potential to evaluate musculoskeletal characteristics,providing help for promoting the application of the backscatter technique in the clinical diagnosis of musculoskeletal disorders(MSDs),such as osteoporosis and muscular atrophy. | Dongsheng Bi Lingwei Shi Boyi Li Ying Li Chengcheng Liu Lawrence HLe Jingchun Luo Sijia Wang Dean Ta | 2024 | Phenomics2024，4，1： | 0 |
| 15 | Realize Facilitated Targeted Poverty Elimination with Targeted Poverty——Alleviation: A New Anti-Poverty Approach for Rural China显示文摘Since the Reform and Opening-up, remarkable achievements in poverty alleviation have been made in China. China's success in mass poverty reduction can be attributed to its rapid economic growth, large-scale regional poverty alleviation and development, sound social security policies, widereaching farmer-benefiting policies and the equal land allotment system. However, with income inequality on the rise, poverty reduction effect made by the economic growth is declining: More targeted poverty alleviation policies are needed by China. Targeted poverty alleviation aims to improve the effect and efficiency of poverty alleviation through precise identification of poverty-stricken populations and comprehensive supportive measures. To tackle a variety of challenges such as the poor cultivation among povertystricken populations, the complex causes for poverty, and inflexible capital management, China should improve its poverty alleviation mechanism by innovating poverty identification methods, support approaches, capital management and performance assessment. | Wang Sangui Liu Wei Wu Lingwei | 2017 | Contemporary Social Sciences2017，2，5： | 0 |
| 16 | Interpreting the Origin and Development of Sichuan Silk from a Cultural Perspective显示文摘Sichuan Silk has a unique historic origin, and a special process of forming and development. It possesses strong vitality and cultural dynamics that keep renewing with new elements. The development of Sichuan Silk has its own cultural features; originating in several places during ancient times and developing at the same pace, being a key support for the economy of Sichuan(known as Tianfu meaning the Land of Abundance) in the Qin(221 BC–206 BC) and Han(206 BC– 220) dynasties, being a vital source of the Silk Road in the Tang(618–907) and Song(960–1279) dynasties, and being known as the Silk City which was dissolved in the Ming(1368–1644) and Qing(1644–1911) dynasties. | Tan Jihe Liu Pingzhong Wu Lingwei | 2017 | Contemporary Social Sciences2017，2，5： | 0 |
| 17 | The Development of China's Intellectual Property Law over the Past Forty Years of Reform and Opening Up显示文摘Over the past forty years of reform and opening-up,China has experienced vigorous development of Intellectual Property Law.During this period,it has successively enacted and promulgated a range of basic laws,among which are the Trademark Law of the PRC,the Patent Law of the PRC,the Copyright Law of the PRC and the AntiUnfair Competition Law of the PRC; and many other related laws and regulations,such as the Regulations of the PRC on the Protection of New Varieties of Plants,Regulations on Protection of Integrated Circuit Layout Design and Provisions on the Protection of Geographical Indication Products.In this way,China has gradually established a relatively sound and complete intellectual property law system.Since the beginning of reform and opening-up,China's practice of intellectual property legislation has adhered to its institutional positioning of being subject to its civil law,safeguarding effective market competition and ensuring the implementation of national strategies.It has followed the development rules of relying on scientific & technological progress,targeting economic and social development and adjusting public policies for guiding purposes.Thanks to this,China has formed multiple coordinating mechanisms to settle conflicts of interests between the protection of intellectual property rights(IPR) and the protection of basic human rights,public health,genetic resources,traditional knowledge,etc.In the future development of China's intellectual property law,a trend of codification will emerge,which will primarily 'include intellectual property law in the civil code' or 'enact an intellectual property code.' The modernization of China's Intellectual Property Law will be manifested in the changes of the defining standard of Intellectual Property Rights(IPR)subjects,the utilization patterns of IPR objects and the protection models of intellectual property.This internationalization will center on creating a new order for international IPR protection. | Wu Handong Liu Xin Wu Lingwei | 2018 | Contemporary Social Sciences2018，3，5： | 0 |
| 18 | Regulation of noncoding RNAs in innate lymphoid cells显示文摘Innate lymphoid cells(ILCs)have been defined in recent years and are important effector cells against pathogens and critical regulators in maintaining tissue homeostasis[1].Noncoding RNAs(ncRNAs),such as circular RNAs(circRNAs),long noncoding RNAs(lncRNAs),and microRNAs(miRNAs),in ILCs are emerging and have been described to function in ILC biology.These ncRNAs are distributed with unique patterns in ILCs and function in different molecular mechanisms.Accumulating research evidence demonstrates that ncRNA dysregulation links ILC-mediated immune responses and diseases. | Benyu Liu Lingwei Zhang Pingping Zhu Zusen Fan | 2023 | Cellular & Molecular Immunology2023，20，5： | 0 |
| 19 | Long-term deterioration of lubricant-infused nanoporous anodic aluminium oxide surface immersed in NaCl solution显示文摘This study investigated the deterioration of a lubricant-infused anodic aluminium oxide surface in a 1M NaCl solution for~200 days.Direct observation by cryo-SEM and quantitative analyses by UV spectroscopy and EIS revealed that the long-term deterioration of the lubricant-infused surface was divided into two stages:the surface-adhered lubricant layer gradually dissolved at a constant rate until the substrate was exposed;afterwards the lubricant infused in the nanochannels began to diffuse and was depleted after~200 days.The EIS results also revealed that the defects reduced the corrosion resistance of the lubricant-infused surface considerably. | Dequan Wu Lingwei Ma Bei Liu Dawei Zhang Badar Minhas Hongchang Qian Herman A.Terryn Johannes M.C.Mol | 2021 | Journal of Materials Science & Technology2021，，5： | 0 |
| 20 | International Communication Theories:Main Development Stages and Reflections显示文摘From the Persian Empire in the 5 th Century BC to the age of globalization, the significance of international communication to international studies and related problems has been repeatedly testi ed by history. The theory of international communication originated in the West. In the new era, many of its theoretical perspectives need to be reviewed and re-evaluated. Compared with other communication patterns such as mass communication, international communication is highlighted by notable characteristics such as its concern for core national interests, distinctive strategic objectives and e ective changes. It offers a new approach to showcasing comprehensive strength among countries and regions. The development of international communication theory can be divided into three main stages. One prominent contribution of the established theoretical achievements lies in its re ning of multiple important general laws of international communication based on the actual needs and its forming of a theoretical system. The major limitation is that these theoretical achievements, under the influence of Western centralism, place excessive emphasis on competition while paying scant attention to accommodation and mutual learning. In the face of new characteristics and practical requirements in the new era, international communication theory should be equipped with a broader vision for more breakthroughs and innovations. | Liu Chen Wu Lingwei | 2018 | Contemporary Social Sciences2018，3，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员