|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Quasi-real-time simulation of rotating drum using discrete element method with parallel GPU computing显示文摘Real-time simulation of industrial equipment is a huge challenge nowadays. The high performance and fine-grained parallel computing provided by graphics processing units (GPUs) bring us closer to our goals. In this article, an industrial-scale rotating drum is simulated using simplified discrete element method (DEM) without consideration of the tangential components of contact force and particle rotation. A single GPU is used first to simulate a small model system with about 8000 particles in realtime, and the simulation is then scaled up to industrial scale using more than 200 GPUs in a 1D domain-decomposition parallelization mode. The overall speed is about 1/11 of the real-time. Optimization of the communication part of the parallel GPU codes can speed up the simulation further, indicating that such real-time simulations have not only methodological but also industrial implications in the near future. | Ji Xu Huabiao Oi Xiaojian Fang Liqiang Lu Wei Ge Xiaowei Wang Ming xu Feiguo Chen xianfeng He Jinghai Li | 2011 | Particuology2011，9，4： | 16 |
| 2 | LA-ICP-MS Zircon U-Pb Dating of Intermediate-Acidic Intrusive Rocks and Molybdenite Re-Os Dating from the Bangpu Mo (Cu) Deposit, Tibet and its Geological Implication显示文摘The multi-stage intrusions of intermediate-acid magma occur in the Bangpu mining district, the petrogenic ages of which have been identified. The times and sequences of their emplacement have been collated and stipulated in detail in this paper by using the laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U-Pb dating method. The ages of biotite monzogranite that were formed before mineralization in the southwest of this mining district are 70±1 Ma (mean square of weighted deviates (MSWD) =9.5, n=8) and 60.60±0.31 Ma (MSWD=3.8, n=16), which belong to the late Cretaceous-early Paleocene in age. That means, they are products of an early tectonicmagmatic event of the collision between the Indian and Asian continentals. The ages of ore-bearing monzogranite porphyry and ore-bearing diorite porphyrite are 16.23±0.19 Ma (MSWD=2.0, n=26) and 15.16±0.09 Ma (MSWD=3.9, n=5) separately, which belong to the middle Miocene in age; namely, they are products of the Gangdese post-collision extensional stage when crust-mantle materials melted and mixed as well as magmatic intrusion simultaneously occurred. Some zircons with ages of 203.6±2.2 Ma (MSWD=1.18, n=7) were captured in the ore-bearing diorite porphyrite, which shows that there had been tectono-magmatic events in the late Triassic-early Jurassic. Molybdenum (copper) ore-bodies produced in the monzogranite porphyry and copper (molybdenum) ore-bodies produced in the diorite porphyrite are the main ore types in this ore deposit. The model ages of Re-Os isotopic dating for the 11 molybdenite are 13.97-15.84 Ma, while isochron ages are 14.09±0.49 Ma (MSWD=26). The isochron ages of seven molybdenite from molybdenum (copper) ore with monzogranite porphyry type are 14.11±0.31 Ma (MSWD=5.2). There is great error in the isochron ages of four molybdenite from copper (molybdenum) ore with diorite porphyrite type, and their weighted average model ages of 14.6±1.2 Ma (MSWD=41), which generally represent the mineralization age. The results about the Re-Os isotopic dating of molybdenite in the ore of different types have limited exactly that, the minerlazation age of this ore deposits is about 14.09 Ma, which belongs to the middle Miocene mineralization. The Bangpu deposit has a uniform metallogenic dynamics background with the porphyry type and skarn-type deposits such as Jiama, Qulong and others. | WANG Liqiang CHEN Yuchuan TANG Juxing LU Pengrui LUO Maocheng WANG Huan CHEN Wei LENG Qiufeng | 2012 | Acta Geologica Sinica(English Edition)2012，86，5： | 13 |
| 3 | Hydrochemical characteristics and recharge sources of Lake Nuoertu in the Badain Jaran Desert显示文摘We present a case study of physical and chemical indicators and isotope characteristics of Lake Nuoertu,one of the largest and deepest lakes of the Badain Jaran Desert.We analyze the concentrations of eight ions,total dissolved solids,and stable isotope composition of the lake and groundwater,as well as radioactive isotope tritium concentration in groundwater.The results show that annual and seasonal variations of the physical and chemical characteristics of Lake Nuoertu water are significantly greater than those of groundwater.The lake is uniformly mixed in the horizontal and vertical directions,and the hydrochemical types of the lake at different depths are consistent for Na–Cl–CO3–(SO4).Stable isotope composition of the lake and groundwater at Nuoertu is distributed along the local evaporation line(EL)slope,which is less than the slope of the global meteoric water line.The comparatively small slope shows the characteristic strong evaporation in the study area.Lake water isotopes are mostly in the upper right corner of the EL,whereas groundwater is mostly in the lower left corner.The main recharge source of Nuoertu lake water is groundwater,in combination with lake water and groundwater level change.The age of tufa springs around Nuoertu is about75–80 a,which shows that the initial recharge source of the lake is a mix between modern and 1952 or older;however,further research is required. | Yue Wu Naiang Wang Liqiang Zhao Zhenyu Zhang Li Chen Ying Lu Xiaonan L Jinlong Chang | 2014 | Chinese Science Bulletin2014，59，9： | 12 |
| 4 | The fluctuating environment associated with the episodic biotic crisis during the Permo/Triassic transition:Evidence from microbial biomarkers in Changxing,Zhejiang Province显示文摘The environmental conditions and the biotic crisis during the Permo-Triassic (Tr/P) transition received increasing attention in the past decades. Presented herein are the molecular fossil records of cyano-bacteria and green sulfur bacteria,the base of the marine ecosystem,to highlight the episodic nature of both the environment and the biotic crisis during this critical period. At least two episodes of cyano-bacterial expansion are documented by 2-methylhopanes ranging from C28 to C32 in carbon number,indicative of the instable marine ecosystem and the fluctuant aquatic nutrients. Meanwhile,the index of 2-alkyl-1,3,4-trimethylbenzenes (biomarkers of green sulfur bacteria) and the ratio of pristane to phy-tane (Pr/Ph) witness the fluctuation of sedimentary environmental redox conditions. The above mo-lecular evidence suggests the occurrence of highly fluctuating environmental conditions during the Tr/P transition,which is consistent with,and probably the cause of,the multi-phased biotic crisis and the prolonged faunal recovery. | HUANG XianYu JIAO Dan LU LiQiang XIE ShuCheng HUANG JunHua WANG YongBiao YIN HongFu WANG HongMei ZHANG KeXin LAI XuLong | 2007 | Science China Earth Sciences2007，50，7： | 10 |
| 5 | Titanium nitride hollow nanospheres with strong lithium polysulfide chemisorption as sulfur hosts for advanced lithium-sulfur batteries显示文摘因为他们的高理论的特定的能力和精力密度,锂硫电池正在答应电气化学的精力存储设备。一位理想的硫主人应该拥有高电导率并且拥抱物理监禁或强壮的化学吸着戏剧性地压制 polysulfide 溶解。此处,有 ~ 的一条平均直径的一致的听空 nanospheres 160 nm 为高效的锂硫电池作为高度有效的锂 polysulfide 水库被报导了。联合锂 polysulfides 套住的高传导性和化学药品, 70 wt.% 硫内容在的获得的 S/TiN 阴极合成在 0.5C 和 1.0C 交付了优秀长寿骑车表演超过 300 个周期。更重要地, 710.4 mAh | Chuanchuan Li Jingjing Shi Lin Zhu Yingyue Zhao Jun Lu Liqiang Xu | 2018 | Nano Research2018，11，8： | 9 |
| 6 | Fabrication and characterization of laminated Ti-(TiB + La_2O_3)/Ti composite显示文摘The incorporation of ceramic particulate reinforcements into titanium alloys can improve the specific strength and specific stiffness,while inevitably reduce the plasticity and ductility.In this study,in situ synthesized multilayer Ti-(TiB +La_2O_3)/Ti composite was designed by learning from the microstructure of nature biological materials with excellent mechanical properties.The Ti-(TiB + La_2O_3)/Ti composite with unique characteristic of laminated structure was prepared by combined powder metallurgy and hot rolling.The method has the synthesize advantages with in-situ reaction of Ti and LaB_6 at high temperature and controllability of reinforcements size and constituent phases in composites.The result shows that the pores in the as sintered laminated structure composite completely disappeared after hot rolling at 1050℃.The agglomerated reinforcement particles were well dispersed and distributed uniformly along the rolling direction.The thickness of pure Ti layer and(TiB+La_2O_3)/Ti composite layer decreased from 1 mm to about 200 μm.Meanwhile,the grains size was refined obviously after rolling deformation.The room temperature tensile test indicates that the elongation of the laminated Ti-(TiB + La_2O_3)/Ti composite improved from 13%to 17%in comparison with the uniform(TiB + La_2O_3)/Ti composite,while the tensile strength had little change.It provides theoretical and experimental basis for fabricating the novel high performance laminated Ti-(TiB + La_2O_3)/Ti composites. | Yuanfei Han Hongqiang Duan Weijie Lu Liqiang Wang Di Zhang | 2015 | Progress in Natural Science:Materials International2015，25，5： | 8 |
| 7 | Changes in energy metabolism in the quadriceps femoris after a single bout of acute exhaustive swimming in rats: a 31p-magnetic resonance spectroscopy study显示文摘 | Sun Yingwei Pan Shinong Chen Zhian Zhao Heng Ma Ying Zheng Liqiang Li Qi Deng Chunbo Fu Xihu Lu Zaiming Guo Qiyong | 2014 | Chinese Medical Journal2014，，5： | 5 |
| 8 | Overview on Reliability of Modular Multilevel Cascade Converters显示文摘Multi-level converters have been used extensively in modern industry which calls for energy conversion with high-power and high-or medium-voltage.Because of its modularity and scalability,the multi-level converter with modular structure can be extended to different voltage levels and has a variety of forms in practical applications.It has attracted much attention from academia in the past decade,however,as a result of the numerous vulnerable power electronics sub-modules,significant challenges remain with regards to reliability.After summarizing the current research status of modular multilevel cascade converters,the main issues of reliability are reviewed in the paper.Firstly,the failure cases are thoroughly surveyed and classified,and the main failure causes are analyzed.Secondly,the reliability evaluation methods are reviewed and applied to the modular multilevel cascade converters.Thirdly,some promising measures to improve the reliability are presented and discussed,including parameter selection,redundancy design,fault-tolerant control and so on.Then,a complete reliability-oriented design procedure for the modular multilevel cascade converters is proposed.Finally,the challenges and opportunities to improve the reliability are concluded. | Zhengming Zhao Kai Li Ye Jiang Sizhao Lu Liqiang Yuan | 2015 | Chinese Journal of Electrical Engineering2015，1，1： | 4 |
| 9 | Isolation and phylogenetic study of Rift Valley fever virus from the first imported case to China显示文摘Dear Editor,Rift Valley fever(RVF)is an anthropozoonosis caused by Rift Valley fever virus(RVFV).RVFV belongs to the Phlebovirus genus in the family Bunyaviridae,which is circulating among ruminants.Human infection with RVFV is generally asymptomatic,however,minority of patients develop severe RVF diseases like encephalitis | Yongxia Shi Kui Zheng Xiaobo Li Liqiang Li Shufen Li Jinmin Ma Jun Dai Jingkai Ji Shuai Yuan Haorong Lu Jiandong Li Fangfang Sun Xun Xu Jicheng Huang | 2017 | Virologica Sinica2017，32，3： | 4 |
| 10 | Effect of B_4C on the Microstructure and Mechanical Properties of As-Cast TiB+TiC/TC4 Composites显示文摘Different additions of B4C were introduced into TC4 to alter the microstructure and mechanical properties.The morphologies of reinforcements are related to the solidification paths.The refinement of lamellar spacing k is based on the precipitation pattern of b-phases.Microhardness,compression elastic modulus(Ec),and elastic modulus of the matrix(Em)appear non-linear relationships with B4C additions.Due to the refinement of lamellar spacing with Hall–Petch-type relationships,and the solution strengthening of C on the a + b matrix,the effect of reinforcements on the mechanical properties will be more efficient when the additions of B4C are no more than 0.19 wt%.When the additions of B4C are more than 0.19 wt%,the efficiency will decrease. | Jiheng Wang Xianglong Guo Lv Xiao Liqiang Wang Weijie Lu Baohui Li Zhongquan Li Di Zhang | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，2： | 4 |
| 11 | Status and perspectives of hierarchical porous carbon materials in terms of high-performance lithium-sulfur batteries显示文摘Lithium-sulfur(Li-S)batteries,although a promising candidate of next-generation energy storage devices,are hindered by some bottlenecks in their roadmap toward commercialization.The key challenges include solving the issues such as low utilization of active materials,poor cyclic stability,poor rate performance,and unsatisfactory Coulombic efficiency due to the inherent poor electrical and ionic conductivity of sulfur and its discharged products(e.g.,Li2S2 and Li_(2)S),dissolution and migration of polysulfide ions in the electrolyte,unstable solid electrolyte interphase and dendritic growth on an odes,and volume change in both cathodes and anodes.Owing to the high specific surface area,pore volume,low density,good chemical stability,and particularly multimodal pore sizes,hierarchical porous carbon(HPC)mate rials have received considerable attention for circumventing the above pro blems in Li-S batteries.Herein,recent progress made in the synthetic methods and deployment of HPC materials for various components including sulfur cathodes,separators and interlayers,and lithium anodes in Li-S batteries is presented and summarized.More importantly,the correlation between the structures(pore volume,specific surface area,degree of pores,and heteroatom-doping)of HPC and the electrochemical performances of Li-S batteries is elaborated.Finally,a discussion on the challenges and future perspectives associated with HPCs for Li-S batteries is provided. | Yinyu Xiang Liqiang Lu Ajay Giri Prakash Kottapalli Yutao Pei | 2022 | Carbon Energy2022，4，3： | 3 |
| 12 | A COMPARATIVE STUDY ON SHILLING DETECTION METHODS FOR TRUSTWORTHY RECOMMENDATIONS显示文摘 | Youquan Wang Liqiang Qian Fanzhang Li Lu Zhang | 2018 | Journal of Systems Science and Systems Engineering2018，27，4： | 3 |
| 13 | A Peer-to-Peer Resource Sharing Scheme Using Trusted Computing Technology显示文摘Facing the increasing security issues in P2P networks,a scheme for resource sharing using trusted computing technolo-gies is proposed in this paper. We advance a RS-UCON model with decision continuity and attribute mutability to control the usage process and an architecture to illustrate how TC technolo-gies support policy enforcement with bidirectional attestation. The properties required for attestation should include not only integrity measurement value of platform and related application,but also reputation of users and access history,in order to avoid the limita-tion of the existing approaches. To make a permission,it is re-quired to evaluate both the authorization and conditions of the subject and the object in resource usage to ensure trustable re-sources to be transferred to trusted users and platform. | CHEN Lu ZHANG Huanguo ZHANG Liqiang LI Song CAI Liang | 2008 | Wuhan University Journal of Natural Sciences2008，13，5： | 2 |
| 14 | Whole-process design and experimental validation of landing gear lower drag stay with global/local linked driven optimization strategy显示文摘Landing gear lower drag stay is a key component which connects fuselage and landing gear and directly effects the safety and performance of aircraft takeoff and landing. To effectively design the lower drag stay and reduce the weight of landing gear, Global/local Linked Driven Optimization Strategy(GLDOS) was developed to conduct the overall process design of lower drag stay in respect of optimization thought. The whole-process optimization involves two stages of structural conceptual design and detailed design. In the structural conceptual design, the landing gear lower drag stay was globally topologically optimized by adopting multiple starting points algorithm. In the detailed design, the local size and shape of landing gear lower drag stay were globally optimized by the gradient optimization strategy. The GLDOS method adopts different optimization strategies for different optimization stages to acquire the optimum design effect. Through the experimental validation, the weight of the optimized lower dray stay with the developed GLDOS is reduced by 16.79% while keeping enough strength and stiffness, which satisfies the requirements of engineering design under the typical loading conditions. The proposed GLDOS is validated to be accurate and efficient in optimization scheme and design cycles. The efforts of this paper provide a whole-process optimization approach regarding different optimization technologies in different design phases, which is significant in reducing structural weight and enhance design tp wid 1 precision for complex structures in aircrafts. | Chengwei FEI Haotian LIU Zhengzheng ZHU Liqiang AN Shaolin LI Cheng LU | 2021 | Chinese Journal of Aeronautics2021，34，2： | 2 |
| 15 | Dandelion-Like Bi_(2)S_(3)/rGO hierarchical microspheres as high-performance anodes for potassium-ion and half/full sodium-ion batteries显示文摘Sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) have been considered as attractive alternatives for next-generation battery systems, which have promising application potential due to their earth abundance of potassium and sodium, high capacity and suitable working potential, however, the design and application of bi-functional high-performance anode still remain a great challenge up to date. Bismuth sulfide is suitable as anode owing to its unique laminar structure with relatively large interlayer distance to accommodate larger radius ions, high theoretical capacity and high volumetric capacity etc. In this study, dandelion-like Bi_(2)S_(3)/rGO hierarchical microspheres as anode material for PIBs displayed reversible capacity, and 206.91 mAh·g^(−1) could be remained after 1,200 cycles at a current density of 100 mA·g^(−1). When applied as anode materials for SIBs, 300 mAh·g^(−1) could be retained after 300 cycles at 2 A·g^(−1) and its initial Coulombic efficiency is as high as 97.43%. Even at high current density of 10 A·g^(−1), 120.3 mAh·g^(−1) could be preserved after 3,400 cycles. The Na_(3)V_(2)(PO_(4))_(3)@rGO//Bi_(2)S_(3)/rGO sodium ion full cells were successfully assembled which displays stable performance after 60 cycles at 100 mA·g^(−1). The above results demonstrate that Bi2S3/rGO has application potential as high performance bi-functional anode for PIBs and SIBs. | Xiuping Sun Lu Wang Chuanchuan Li Debao Wang Iqbal Sikandar Ruxia Man Fang Tian Yitai Qian Liqiang Xu | 2021 | Nano Research2021，14，12： | 2 |
| 16 | Evaluation of the toxicity of fluorine in Antarctic krill on soft tissues of Wistar rats显示文摘Antarctic krill are a potential food source for humans and animals, but krill are known to contain high levels of fluorine (F). In this study, we investigated the toxicity of F in Antarctic krill using Wistar rats. There were three experimental groups: The control group were fed a basal diet, the krill treatment group were fed the same basal diet mixed with krill powder (150 mg·kg-1 F), and the sodium fluoride (NaF) treatment group were fed the basal diet with added NaF (150 mg·kg-1 F). General toxicity indicators including body weight and food intake were measured during the experiment. After three months the rats were dissected and tissue samples were collected from the liver, kidney, spleen, brain, and testis. Morphological changes in the cells of these tissues were assessed using HE staining. There were no significant differences in the body weight, the food intake, or the viscera coefficients among the three groups. In both treatment groups some pathological changes were observed in all soft tissue samples except the testis, although there were fewer and less severe pathological changes in the krill treatment group than in the NaF treatment group. The results showed that the toxicity of F in Antarctic krill was lower than for an equivalent amount of F in NaF, but it was still toxic to rats consuming large quantities of krill. The findings of this study highlight the need for further investigation into potential F toxicity if krill is to be used for human consumption. | ZHANG Ling LU Xiaoqi WANG Zhangmin QIN Liqiang YUAN Linxi YIN Xuebin | 2013 | Advances in Polar Science2013，24，2： | 2 |
| 17 | Dynamic parametric modeling-based model updating strategy of aeroengine casings显示文摘For accurate Finite Element(FE)modeling for the structural dynamics of aeroengine casings,Parametric Modeling-based Model Updating Strategy(PM-MUS)is proposed based on efficient FE parametric modeling and model updating techniques regarding uncorrelated/correlated mode shapes.Casings structure is parametrically modeled by simplifying initial structural FE model and equivalently simulating mechanical characteristics.Uncorrelated modes between FE model and experiment are reasonably handled by adopting an objective function to recognize correct correlated modes pairs.The parametrized FE model is updated to effectively describe structural dynamic characteristics in respect of testing data.The model updating technology is firstly validated by the detailed FE model updating of one fixed–fixed beam structure in light of correlated/uncorrelated mode shapes and measured mode data.The PM-MUS is applied to the FE parametrized model updating of an aeroengine stator system(casings)which is constructed by the proposed parametric modeling approach.As revealed in this study,(A)the updated models by the proposed updating strategy and dynamic test data is accurate,and(B)the uncorrelated modes like close modes can be effectively handled and precisely identify the FE model mode associated the corresponding experimental mode,and(C)parametric modeling can enhance the dynamic modeling updating of complex structure in the accuracy of mode matching.The efforts of this study provide an efficient dynamic model updating strategy(PM-MUS)for aeroengine casings by parametric modeling and experimental test data regarding uncorrelated modes. | Chengwei FEI Haotian LIU Shaolin LI Huan LI Liqiang AN Cheng LU | 2021 | Chinese Journal of Aeronautics2021，34，12： | 2 |
| 18 | Liquid chromatography–tandem mass spectrometry method for simultaneous determination of valproic acid and its ene-metabolites in epilepsy patient plasma显示文摘A simple and high throughput method was developed and validated for simultaneous determination of valproic acid and its two toxicant ene-metabolites, 2-enevalproic acid and 4-enevalproic acid in epilepsy patient plasma using liquid chromatography–tandem mass spectrometry. Probenecid was used as internal standard and solid-phase extraction was selected for sample preparation. A chromatographic separation was performed on an Agilent Poroshell SB-C_(18) column(50 mm*4.6 mm i.d., 2.7 μm) by an optimized gradient elution at a flow rate of 0.9 mL/min. The total run time was 7 min. Electrospray ionization was used in negative ion mode by multiple reaction monitoring of the precursor-to-product ion transitions at m/z 143.0→143.0 for valproic acid, m/z 140.9→140.9 for 2-enevalproic acid and 4-enevalproic acid for their poor fragments, and m/z 283.9→239.9 for probenecid. The results showed good linearity of valproic acid, 2-enevalproic acid and 4-enevalproic acid in their respective linear ranges.The correlation coef fi cients were more than 0.998. The intra- and inter-day precision of the assay was less than 11.0% and the accuracy ranged from 2% to 12%. This analytical method was successfully applied to assay plasma concentrations of valproic acid and its two ene-metabolites in epilepsy patient plasma and used for therapeutic drug monitoring. | Huan Lu Chong Su Lei Yin Liqiang Gu Jingkai Gu Xiaohui Chen | 2016 | Journal of Pharmaceutical Analysis2016，6，2： | 2 |
| 19 | Rift Valley Fever Virus and Yellow Fever Virus in Urine: A Potential Source of Infection显示文摘Dear Editor,In recent years,the incidence of human infections caused by emerging or re-emerging pathogens has rapidly increased.Diseases that were once regional now have the ability to spread globally in a short amount of time and pose a wider threat to public health(Weaver et al.2018).Yellow fever virus(YFV,family Flaviviridae,genus Flavivirus)is a mosquito-borne flavivirus that causes yellow fever in humans and has been endemic in Africa and Latin America for many years(Domingo et al.2018). | Meng Li Beibei Wang Liqiang Li Gary Wong Yingxia Liu Jinmin Ma Jiandong Li Hongzhou Lu Mifang Liang Ang Li Xiuqing Zhang Yuhai Bi Hui Zeng | 2019 | Virologica Sinica2019，34，3： | 1 |
| 20 | Fermi surface gapping in the hidden order state of PrFe_(4)P_(12);by point-contact spectroscopy显示文摘We have applied point-contact spectroscopy(PCS) to investigate the nonmagnetic hidden order(HO) state of the skutterudite compound PrFe_(4)P_(12) with its transition temperature THO~6.5 K. Its point-contact conductance curves exhibit a reproducible gap structure in the HO state below THOand its temperature dependent gap magnitude follows a BCS-like mean-field behavior.A Fano-like conductance shape is observed to emerge below the coherence temperature of PrFe_(4)P_(12). In a magnetic field, the gap feature is gradually suppressed and evolves into a pronounced Fano peak, signaling the heavy fermion state and vividly demonstrating the competition between HO and the formation of heavy fermion states. Our results strongly suggest the itinerant characteristic of f electrons in PrFe_(4)P_(12), which constrains theoretical models to explain the HO mechanism. | Tian Le LiQiang Che Qi Huang Kevin Huang ZhaoFeng Ding Lei Shu Xin Lu | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，3： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员