检索结果-内蒙古大学图书馆

Enhanced Ablation Resistance of Carbon Fiber Reinforced Phenolic Composites Through Designing In-Plane Heat Conduction And Out-of-Plane Heat Insulation Channels

SSRN

引用

SSRN 2024年

作者： Chen, Xiang Shi, Kui Gu, Ziwen Quan, Huafeng Huang, Dong Zhang, Yuefeng Li, Tongqi Ye, Chong Fan, Zhen Zhu, Shipeng Liu, Jinshui Peng, Chaoyi Tao, Lei College of Materials Science and Engineering Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Changsha410082 China Hunan Province Engineering Research Center for High Performance Pitch-based Carbon Materials Hunan Toyi Carbon Material Technology Co. Ltd. Changsha410000 China Key Laboratory of Advanced Functional Composite Materials Aerospace Research Institute of Materials and Processing Technology Beijing100076 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China Zhuzhou Times New Material Technology Co. Ltd. Zhuzhou412007 China China Academy of Launch Vehicle Technology China

With the development of near-space vehicles toward higher Mach speeds, the aerodynamic heating problem poses an increasingly serious challenge to thermal protection system, and thus it is urgent to further improve the ablation resistance of carbon fiber reinforced phenolic resin (CF/PR). To achieve this, an innovative composite was prepared using mesophase-pitch-based carbon fiber as a reinforcement to construct the in-plane heat transfer channels. The thermal conductivities of composite in in-plane (λi) and out-of-plane (λo) directions were 24.37 W·m-1·K-1 and 0.96 W·m-1·K-1, respectively, and the ratio(λi/λo) is up to 25.39, which plays a positive role in enhancing the heat dissipation of ablation center while maintaining effective interlayer insulation. During ablation, the composite exhibits a 159 °C lower stagnation-point temperature compared to the control group, and the maximum and average temperature on its backside decrease 196 °C and 201 °C, respectively. Consequently, the mass ablation rate and the line ablation rate of composite are reduced by 72.5% and 87.6%, respectively. The anisotropic thermal behavior and higher λi/λo value contribute to the decrease of the stagnation-point temperature, the maximum temperature and the average temperature on the backside, thereby improving the ablation resistance of composite. © 2024, The Authors. All rights reserved.

关键词： Ablation

来源：评论

学校读者我要写书评

暂无评论

On the electrochemical CO2 reduction by Bi-based catalysts: single crystals or mixture phases

arXiv

引用

arXiv 2024年

作者： Zhou, Mengting Liu, Hongxia Yan, Juntao Chen, Qingjun Chen, Rong Liu, Lei School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan430205 China Center for Computational Chemistry School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan430200 China College of Chemistry and Environmental Engineering Wuhan Polytechnic University Wuhan430023 China Key Laboratory of Rare Earths Chinese Academy of Sciences Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341000 China State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University 430200Wuhan China

Metallic bismuth is both non-toxic and cost-effective. Bi-based catalysts have demonstrated the ability to efficiently produce HCOOH through CO2RR while effectively inhibiting the HER. Although many experiments have been reported concerning its performance towards CO2 reduction, the impact its valence states and crystal faces on CO2RR selectivity (e.g. HCOOH versus CO) it still under debate. Here, we performed a comprehensive study via density functional theory, by including three typical valence states of Bi, such as 0 (Bi), +3 (Bi2O3) and +5 (Bi2O5), as well as their often-studied crystal facets. The results show that metallic Bi demonstrates a poor selectivity for HCOOH, but boasts a higher conversion rate for CO2. While Bi2O3 exhibits a good selectivity for HCOOH production, yet it displays a lower conversion rate for CO2. For Bi2O5, all studied surfaces show high energy barriers in both cases of HCOOH and CO production, and lower energy barriers for HER reactions, indicating that Bi at +5 valence state is not the good choice for 2e transfer reactions. Subsequently, we further examined the effects of oxygen contents on the selectivity of HCOOH and the conversion rate for CO2. Interestingly, we found that partial oxidization of Bi benefits both the selectivity and the conversion rate. With these observations, we suggest that a mixture of Bi (0) and Bi2O3 (+3) phases would be a better choice than single crystals for future experiments. © 2024, CC BY.

关键词： Bismuth compounds

来源：评论

学校读者我要写书评

暂无评论

Efficient Promotion of Cr(Vi) Removal Over Bi2s3 Nanostructure Assisted with Cupric Ions: Potential Applications in Electroplating Wastewater and Contaminated Groundwater

SSRN

引用

SSRN 2022年

作者： Tao, Xiong Chen, Fengxi Li, Jun Liu, Yun-Ling Hu, Xiaowu Chen, Rong State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan430205 China Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450002 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Jilin130012 China

Emerging Bi2S3 -based nanotechnology has great potential in Cr(VI)-contaminated wastewater treatment. In this work, it was found for the first time that Bi2S3 nanostructure (BS-D) prepared from dual sulfur sources of L-cysteine and ammonium sulfide efficiently promoted Cr(VI) removal with excellent selectivity for simultaneous removal of Cr(VI) and Cu2+ from aqueous solutions containing various co-existing ions (including Na+, K+, Ca2+, Zn2+, Ni2+, Cd2+, NO3-, SO42- and Cl- ) at pH > 3, preferably at pH = 4.5. Besides, BS-D exhibited stable performance for the co-removal of Cr(VI) and Cu2+ in five recycling tests. Kinetic and thermodynamic studies indicated that the adsorption of Cr(VI) or Cu2+ by BS-D was a spontaneous endothermic process and conformed to pseudo-second-order kinetic model. The adsorbed Cr(VI) ions were partially reduced to Cr(III), which were leached into the solution at pH ≤ 3, inhibiting the adsorption of Cu2+ on BS-D and its promotional effect on Cr(VI) removal by BS-D. The mutual promotional effects of Cu2+ and Cr(VI) could be attributed to electrostatic attraction between HCrO4- and Cu2+ and smaller pH variation of Cr(VI)-Cu2+ mixed solution during their co-removal by BS-D. Finally, potential applications of BS-D were demonstrated by co-removal of Cr(VI) and Cu2+ from two real water matrixes (electroplating wastewater and contaminated groundwater). This work provided a promising BS-D adsorbent for Cr(VI)-contaminated wastewater treatment, and shed insight on the influence of Cu2+ on the Cr(VI) removal by BS-D. © 2022, The Authors. All rights reserved.

关键词： Adsorption

来源：评论

学校读者我要写书评

暂无评论

Aligned fibrin/functionalized self-assembling peptide interpenetrating nanofiber hydrogel presenting multi-cues promotes peripheral nerve functional recovery

引用

Bioactive materials 2022年第2期7卷 529-544页

作者： Shuhui Yang Jinjin Zhu Changfeng Lu Yi Chai Zheng Cao Jiaju Lu Zhe Zhang He Zhao Yin-Yuan Huang Shenglian Yao Xiangdong Kong Peixun Zhang Xiumei Wang State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084PR China Key Laboratory of Trauma and Neural Regeneration Peking UniversityMinistry of EducationDepartment of Trauma and OrthopedicsPeking University People’s HospitalBeijing100044PR China Department of Orthopaedic Surgery Sir Run Run Shaw HospitalZhejiang University School of Medicine&Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of ZhejiangHangzhou310016PR China School of Clinical Medicine Tsinghua UniversityBeijing100084PR China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083PR China School of Materials Science and Engineering Zhejiang-Mauritius Joint Research Center for Biomaterials and Tissue EngineeringZhejiang Sci-Tech UniversityHangzhou310018PR China

Nerve guidance conduits with hollow lumen fail to regenerate critical-sized peripheral nerve defects(15 mm in rats and 25 mm in humans),which can be improved by a beneficial intraluminal ***,individual cues provided by intraluminal filling materials are inadequate to eliminate the functional gap between regenerated nerves and normal ***,an aligned fibrin/functionalized self-assembling peptide(AFG/fSAP)interpenetrating nanofiber hydrogel that exerting synergistic topographical and biochemical cues for peripheral nerve regeneration is constructed via electrospinning and molecular *** hydrogel possesses an aligned structure,high water content,appropriate mechanical properties and suitable biodegradation capabilities for nerve repair,which enhances the alignment and neurotrophin secretion of primary Schwann cells(SCs)in vitro,and successfully bridges a 15-mm sciatic nerve gap in rats in *** rats transplanted with the AFG/fSAP hydrogel exhibit satisfactory morphological and functional recovery in myelinated nerve fibers and innervated *** motor function recovery facilitated by the AFG/fSAP hydrogel is comparable with that of ***,the AFG/fSAP hydrogel upregulates the regeneration-associated gene expression and activates the PI3K/Akt and MAPK signaling pathways in the regenerated ***,the AFG/fSAP hydrogel represents a promising approach for peripheral nerve repair through an integration of structural guidance and biochemical stimulation.

关键词： Peripheral nerve regeneration Alignment Nanofibers Fibrin Self-assembling peptides

来源：评论

学校读者我要写书评

暂无评论

Microwave-Pulse Sugar-Blowing Assisted Synthesis of 2d Transition Metal Carbides for Sustainable Hydrogen Evolution

SSRN

引用

SSRN 2022年

作者： Hu, Rong Jiang, Huiyu Xian, Jinglin Mi, Shiyun Wei, Liyun Fang, Guangyu Guo, Jiayue Xu, Siqi Liu, Ziyang Jin, Huanyu Xu, Weilin Wan, Jun State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing Wuhan Textile University Wuhan430200 China Institute for Sustainability Energy and Resources The University of Adelaide AdelaideSA5005 Australia

Electrocatalytic hydrogen evolution reaction (HER) is crucial to clean fuel production. Two-dimensional transition metal carbides (2D TMCs) are promising in HER electrocatalysts by their excellent intrinsic catalytic activity. However, the synthesis of 2D TMCs requires long-term high-temperature conditions or rigorous etching processes. Here we achieved an ultra-fast and facile synthesis of ultra-thin carbon-terminated 2D TMCs via a microwave-pulse sugar-blowing method. A series of 2D TMCs are obtained within only 3 minutes. This method leads to the accurate adjustment of carbon-layer thickness and facilitate the formation of 2D structures. Accordingly, the electrocatalytic HER activity and stability of TMCs are significantly improved. The synthesized 2D W2C with 1 nm carbon-layer thickness shows high HER activity and ultra-long durability (100 h) in both acidic and alkaline electrolytes. Furthermore, the microwave-pulse method is a generic synthesis strategy that is demonstrated by the successful preparation of 2D WC, Mo2C and MoC. © 2022, The Authors. All rights reserved.

关键词： Electrocatalysts

来源：评论

学校读者我要写书评

暂无评论

In-Situ Transformation and Synergistic Electrocatalysis of Asymmetric Threefold Hollow Sites in Rosebud-Like Ternary Metal Diselenide

SSRN

引用

SSRN 2024年

作者： Wang, Shihao Liao, Lin Wu, Jinsong Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Guangdong Foshan528200 China International School of Materials Science and Engineering School of Materials and Microelectronics Wuhan University of Technology Hubei Wuhan430070 China Nanostructure Research Centre Wuhan University of Technology Hubei Wuhan430070 China Hubei Key Laboratory of Fuel Cell Wuhan University of Technology Hubei Wuhan430070 China

Electrochemical dynamic reconstruction substantially optimizes the catalytic properties of transition-metal-based precatalysts for the multi-electron oxygen evolution reaction (OER) by altering the surface structure, exposing more active sites, improving electron/ion transport, and enhancing stability. This research provides a comprehensive understanding of the in-situ transformation manner of a rosebud-like ternary metal diselenide precatalyst (Ni0.8Fe0.2Co0.1Se2) and the synergistic electrocatalytic mechanism of catalytic active centers through in-situ and ex-situ characterization along with DFT calculations. Benefiting from the unique morphology and abundant nanoscale planar defects within the conductive Ni0.8Fe0.2Co0.1Se2 core and the in-situ formed catalytically active (Fe, Co)-doped γ-NiOOH shell, the reconstructed catalyst achieves rapid electron/ion transport and copious active site exposure. Accordingly, the Ni0.8Fe0.2Co0.1Se2 catalyst only requires overpotentials of 101 mV and 233 mV to achieve current densities of 10 mA cm−2 and 100 mA cm−2, respectively. The overall water-splitting cell using Ni0.8Fe0.2Co0.1Se2 anode delivers current densities of 10 and 100 mA cm−2 at low cell voltages of 1.41 and 1.56 V, respectively. Furthermore, the cell demonstrates exceptional durability of 400 h at an industrial-level current density. This work sheds light on the development of efficient transition-metal-based precatalysts for OER. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

来源：评论

学校读者我要写书评

暂无评论

High-entropy ceramics:Present status,challenges,and a look forward

引用

Journal of advanced Ceramics 2021年第3期10卷 385-441页

作者： Huimin XIANG Yan XING Fu-zhi DAI Hongjie WANG Lei SU Lei MIAO Guojun ZHANG Yiguang WANG Xiwei QI Lei YAO Hailong WANG Biao ZHAO Jianqiang LI Yanchun ZHOU Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Institute of Functional Material College of Material Science and EngineeringDonghua UniversityShanghai 201620China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210China College of Material Science and Engineering Shenzhen UniversityShenzhen 518060China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal *** in the infant stage,the emerging of this new family of materials has brought new opportunities for material design and property *** from metals,the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon *** from strengthening,hardening,and low thermal conductivity that have already been found in high-entropy alloys,new properties like colossal dielectric constant,super ionic conductivity,severe anisotropic thermal expansion coefficient,strong electromagnetic wave absorption,etc.,have been discovered in *** a response to the rapid development in this nascent field,this article gives a comprehensive review on the structure features,theoretical methods for stability and property prediction,processing routes,novel properties,and prospective applications of *** challenges on processing,characterization,and property predictions are also ***,future directions for new material exploration,novel processing,fundamental understanding,in-depth characterization,and database assessments are given.

关键词： high-entropy ceramics(HECs) processing structure properties applications

来源：评论

学校读者我要写书评

暂无评论

Immunocompetent Tissue-Engineered Cartilage Scaffold by 3d Bioprinting Combined with Mechanical Stimulation

SSRN

引用

SSRN 2024年

作者： Huang, Yantong Zhu, Jing Li, Xiaohong Poudel, Abishek Jung Li, Basen Xiao, Lin School of Biomedical Engineering Sun Yat-Sen University Shenzhen Campus Shenzhen518107 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China The University of Queensland Australian Institute for Bioengineering and Nanotechnology Centre for Advanced Imaging AIBN building 75 St LuciaQLD4072 Australia Department of Radiology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China

Tissue engineering based on 3D bioprinting holds great potential in clinical cartilage reconstruction and in vivo graft repair. Recently, numerous studies have shown that mechanical stimulation plays an important role in cartilage formation and functionality maintenance. In addition, the immune mechanism of the body plays an important role in the occurrence, development, and treatment of articular cartilage injuries and diseases. However, the effects of 3D bioprinted hydrogel scaffolds combined with mechanical stimulation and immunomodulation on cartilage repair and regeneration has been scarely reported. In this study, we designed and prepared a Gelatin methacryloyl/hyaluronic acid methacryloyl (GelMA/HAMA-based) hydrogel scaffold incorporating Mn-doped dendritic mesoporous silica nanoparticles (Mn-DMSNs) for cartilage tissue engineering. In vitro experiments showed that constant compression stimulation could significantly upregulate the cartilage gene expression. This effect could be mediated by transforming growth factors- β (TGF-β) and Ca2+, which impacted the cartilage phenotype. Moreover, Mn-DMSNs could promote the transformation of macrophages from M1 to M2, which exhibited an immunomodulatory effect. Animal trials showed that the hydrogel scaffold combined with Mn-DMSNs and constant compression could reduce the levels of inflammatory factors and promote the repair of both bone and cartilage. Overall, the hydrogel scaffold, with its superior biocompatibility and chondrogenesis potential, could serve as a promising material for cartilage defect repair. © 2024, The Authors. All rights reserved.

关键词： Cartilage

来源：评论

学校读者我要写书评

暂无评论

Low Viscosity and High Strength Room Temperature Cured Epoxy Structural Adhesive Based on Different Amine Curing Agents

SSRN

引用

SSRN 2022年

作者： Bi, Shuguang Xiao, Ming Huang, Liang Rong, Huaqing Jia, Liping Ran, Jianhua Quan, Heng Zhang, Liying Tang, Jiagong Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Civil Aviation Composites Donghua University Shanghai201620 China Wuhan Rongshengjimei Technology Co. LTD Wuhan430058 China

Epoxy resin has been widely used in the field of bonding owing to its low shrinkage and high adhesive performance, especially room temperature cured epoxy resin has been paid more and more attention in the field of construction engineering. However, it is still a great challenge to ensure that the epoxy adhesive with low viscosity has a high mechanical strength during rapid curing at room temperature in some construction engineering fields, such as filling repair, bonding steel reinforcement, etc. In this work, low viscosity and high strength room temperature cured epoxy structural adhesives were fabricated by using 1,4-butanediol diglycidyl ether (BDE) with difunctional groups as active diluent to reduce the viscosity of bisphenol F epoxy resin (BPF-170) and four kinds of amines, namely 2,4,6-Tris(dimethylamiomethyl)phenol (TAP), Triethylenetetramine (TETA), N-Aminoethylpiperazine (AEP) and Isophorondiamine (IPDA) as curing agents at room temperature, following by the investigation of the effects of the four different chemical structures of curing agents on the gelation time and mechanical properties of epoxy structural adhesive. Among the four kinds of epoxy structural adhesives, the BPF-170/BDE/IPDA system using alicyclic amine has the lowest viscosity of 77 mPa·s and the longest gelation time of 95.9 min. Furthermore, the BPF-170/BDE/AEP system using piperazine amine has the best mechanical properties with the shear strength, tensile strength, compressive strength and impact strength of 23 MPa, 62.5 MPa, 112.9 MPa and 2.82 kJ/m2, respectively. In addition, the four epoxy structural adhesives have great thermal stability. The initial decomposition temperatures are all above 280 ℃ and the maximum decomposition temperatures are all above 360 ℃. These four epoxy structural adhesives with low viscosity and high strength have significant application value in the fields of construction engineering, joint filling and potting repairing, etc. © 2022, The Authors. All righ

关键词： Amines

来源：评论

学校读者我要写书评

暂无评论

Unraveling Photothermal-Enhanced Bulk Charge Transport and Surface Oxygen Reactions in Tio2 Photoanodes for Highly Efficient Photoelectrochemical Water Oxidation

SSRN

引用

SSRN 2022年

作者： Liu, Xueqin Huang, Jing Wang, Jingnan Lin, Kaijie He, Bing Hu, Xiaoqin Yang, Yingkui Wang, Yang Li, Zhen State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education Hubei Key Laboratory of Catalysis and Materials Science South-Central University for Nationalities Wuhan430074 China

Titanium dioxide (TiO2) has been extensively used as an important photoanode material for photoelectrochemical (PEC) water splitting, but its activity is greatly hindered by the low charge transport and sluggish oxygen evolution reaction (OER) kinetics. Herein, we demonstrate spinel oxide NiCo2O4 (NCO) acted as both photothermal material and oxygen evolution cocatalyst could significantly promote the PEC performance of TiO2 photoanodes, and a high photocurrent of 2.34 mA cm-2 at 1.23 V vs. reversible hydrogen electrode has been achieved by NCO/TiO2 photoanodes assisted by photothermal effect. Importantly, a mechanism is proposed to explain the enhanced bulk charge transport and surface OER activity by an integrated various operando characterizations and density functional theory (DFT) study. Intensity modulated photocurrent spectroscopy (IMPS) analysis and DFT calculations imply the relatively high temperature induced by photothermal effect could accelerate small polaron hopping in the bulk of TiO2, which is verified by the electron diffusion coefficient variation of TiO2 with oxygen vacancies at different temperature. Operando cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) reveal that photothermal conversion facilitates the oxidation of Ni2+ at lower potential and promotes the adsorption of *OH and deprotonation of *OOH intermediates. This work provides deep insight into the photothermal-enhanced PEC performance by observing the bulk small polaron hopping and surface dynamic evolution during the PEC process, which may underpin future advances in promoting PEC and photocatalytic performances of small-polaron-type semiconductors. © 2022, The Authors. All rights reserved.

关键词： Charge transfer

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：