检索结果-内蒙古大学图书馆

Influence of coded mask rotation speed and central detector to imaging performance for time-encoded imager

RADIATION PHYSICS AND CHEMISTRY 2023年第1期209卷

作者： Zhao, Dong Jia, Wenbao Hei, Daqian Liang, xuwen Cheng, Wei Cai, Pingkun zhang, Ronghua Shan, Qing Ling, Yongsheng Nanjing Univ Aeronaut & Astronaut Dept Nucl Sci & Technol Nanjing 211106 Peoples R China Lanzhou Univ Sch Nucl Sci & Technol Lanzhou 730000 Peoples R China Jiangsu Higher Educ Inst Collaborat Innovat Ctr Radiat Med Suzhou 215000 Peoples R China

Time-encoded imaging could be useful for searching potential radioactive sources for preventing illicit trans-portation and trafficking of nuclear materials. A 2-D, dual-particle, time-encoded imager was developed for gamma-ray and neutron source imaging. The influence of central detector and coded mask rotation speed to imaging performance, such as angular resolution, signal-to-noise ratio and detection time, was investigated by Am-Be neutron source imaging experiments. The EJ276 plastic scintillator (Size: phi 5.08 cm x 5.08 cm) and CLYC scintillator (Size: phi 2.54 cm x 2.54 cm) couple to photomultiplier tubes was set as the central detector, respectively. Under the experiment conditions (Am-Be neutron source;300 mCi;1.8 m), for the neutron and gamma-ray images with EJ276 detector, the best horizontal and vertical angular resolution was (3.7 degrees, 4.8 degrees) and (5.9 degrees, 6.6 degrees), minimum detection time was 100 s and 600 s, respectively;for the neutron and gamma-ray images with CLYC detector, the best horizontal, vertical angular resolution was (3.1 degrees, 3.1 degrees) and (3.5 degrees, 3.3 degrees), minimum detection time was 2200 s and 1600 s, respectively. For different central detector, the results showed that the smaller volume of detector, the better angular resolution;the lower detection efficiency, the longer detection time. For different rotation speed, too fast rotation speed can lead to failure to locate the source.

关键词： Time-encoded imager Dual-particle imaging Imaging performance

来源：评论

学校读者我要写书评

暂无评论

Regulation from gradient to near periodic sequence during anionic copolymerization of styrene and dimethyl-[4-(1-phenyl-vinyl)phenyl]silane (DPE-SiH)

引用

POLYMER 2022年 244卷 124663-124663页

作者： Li, xuwen Han, Li zhang, Ruixue Li, Chao zhang, Songbo Bai, Hongyuan Wang, Xuefei Wang, Bo Ma, Hongwei Dalian Univ Technol Sch Chem Engn Dept Polymer Sci & Engn State Key Lab Fine Chem Dalian 116024 Peoples R China

A facile strategy for achieving sequence-controlled polymers with a sufficient molecular diversity is of great importance. The periodic and gradient copolymers of styrene (St) and dimethyl-[4-(1-phenylvinyl)phenyl]silane (DPE-SiH) obtained through the living anionic copolymerization (LACOP) under the variable feed ratios (St:DPE-SiH = 0.5-4) in a nonpolar solvent without additives were well studied in our prior work (zhang et al., 2019) [34]. Herein, a further study on the critical feed ratio of St (S) and DPE-SiH (D) at 3:1 is performed during the LACOP, where a peculiar interest lies whether a novel sequence will emerge between the periodic and gradient sequence with the additives of t-BuOK and THF. As the whole chain propagation process is monitored using in situ H-1 NMR spectroscopy, the copolymerization kinetics, i.e., the reactivity ratio (r), apparent rate parameters (K-app.), and the copolymer microstructures are investigated. Both t-BuOK and THF favors the incorporation of St into LACOP, as the trends r(St) = 0.1 (gradient sequence without additives) < r(St) = 0.22-0.29 (near periodic sequence for t-BuOK) < r(St) = 0.7-0.76 (near periodic sequence for THF). The near periodic sequences exhibit different periodicities distributed as "DSSDSS " for the t-BuOK and "DSSSDSSS " for the THF in the major. The strategy achieves the sequence regulation from statistically gradient to near periodic copolymers. Furthermore, we observe that the near periodic copolymers exhibit the similar T-g values but over the gradient copolymers.

关键词： Living anionic copolymerization Near periodic sequence Additives

来源：评论

学校读者我要写书评

暂无评论

Nitrite accumulation stability evaluation for low-strength ammonium wastewater by adsorption and biological desorption of zeolite under different operational temperature

引用

SCIENCE OF THE TOTAL ENVIRONMENT 2020年 704卷 135260-135260页

作者： Chen, Zhenguo Zheng, xuwen Chen, Yongxing Wang, Xiaojun zhang, Lijuan Chen, Haochuan South China Univ Technol Sch Chem & Chem Engn Guangzhou 510641 Guangdong Peoples R China South China Univ Technol Sch Environm & Energy Guangzhou 510006 Guangdong Peoples R China Hua An Biotech Co Ltd Foshan 528300 Peoples R China Minist Educ Key Lab Pollut Control & Ecosyst Restorat Ind Clu Guangzhou Guangdong Peoples R China

How to achieve stable nitrite accumulation was still a huge challenge for low-carbon and energy-saving biological nitrogen removal of low-strength ammonium wastewater. This study proposed a new way to solve this problem with zeolite biological fixed bed (ZBFB) by cycle operation of adsorption and biological desorption. In order to evaluate nitritation performance of this reactor, the influence of operational temperature on nitrite accumulation stability was investigated by 126 cycles operation in four parallel ZBFB reactors for low-strength ammonium wastewater (50 mg/L NH4+-N). It was found that higher operational temperature (i.e., 36.0 degrees C), rather than other temperature (i.e., 27.0 degrees C, 30.0 degrees C, 33.0 degrees C), could maintain stable nitrite accumulation with nitrite production rate of 0.312 kg NO2--N.m(-3) ***(-1) and nitrite accumulation ratio higher than 95.0% after biological desorption. High-throughput sequencing analysis results showed that bacterial structure significantly changed in ZBFB under different operational temperature, and obvious enrichment of genus Nitrosomonas (AOB) and gradually enhanced free ammonia (FA) inhibition on genus Nitrospira and Nitrobacter (NOB) were found by elevation of operational temperature, leading to different nitrite accumulation performance in ZBFB reactors. The mechanism for stable nitrite accumulation performance by ZBFB might be attributed to overwhelming growth rate of AOB than NOB, faster ammonium desorption and enhanced FA inhibition on NOB under operational temperature (i.e., 36.0 degrees C). All in all, keeping high temperature for biological desorption step should be extremely crucial for stable nitrite accumulation by ZBFB, which could facilitate further low-carbon and energy-saving biological nitrogen removal for low-strength ammonium wastewater treatment. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Low-strength ammonium Nitritation Zeolite Biofilm Temperature Stability

来源：评论

学校读者我要写书评

暂无评论

Danshensu inhibits SARS-CoV-2 by targeting its main protease as a specific covalent inhibitor and discovery of bifunctional compounds eliciting antiviral and anti-inflammatory activity

引用

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 2024年第Part2期257卷 128623页

作者： Wang, Ruyu Chen, xuwen Li, Hongtao Chen, Xixiang Sun, Donghui Yu, Danmei Lu, Jiani Xie, Yuanyuan zhang, Qian Xu, Jianrong zhang, Weidong Chen, Hongzhuan Liu, Shunying Chen, Lili Shanghai Univ Tradit Chinese Med Inst Interdisciplinary Integrat Med Res Shanghai Frontiers Sci Ctr TCM Chem Biol Shanghai Peoples R China East China Normal Univ Shanghai Engn Res Ctr Mol Therapeut & New Drug Dev Sch Chem & Mol Engn Shanghai 200062 Peoples R China Shanghai Univ Tradit Chinese Med Acad Integrat Med 1200 Cailun Rd Shanghai 201203 Peoples R China Fudan Univ Sch Pharm Dept Med Chem Shanghai 201203 Peoples R China Shanghai Univ Tradit Chinese Med Shanghai Inst Infect Dis & Biosafety Inst Interdisciplinary Integrat Med Res Shanghai 201203 Peoples R China Shanghai Univ Tradit Chinese Med Inst Interdisciplinary Integrat Med Res Shanghai 201203 Peoples R China

The coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has posed a serious threat to human. Since there are still no effective treatment options against the new emerging variants of SARS-CoV-2, it is necessary to devote a continuous endeavor for more targeted drugs and the preparation for the next pandemic. Salvia miltiorrhiza and its active ingredients possess wide antiviral ac-tivities, including against SARS-CoV-2. Danshensu, as one of the most important active ingredients in Salvia miltiorrhiza, has been reported to inhibit the entry of SARS-CoV-2 into ACE2 (angiotensin-converting enzyme 2)-overexpressed HEK-293T cells and Vero-E6 cells. However, there is a paucity of information regarding its detailed target and mechanism against SARS-CoV-2. Here, we present Danshensu as a covalent inhibitor of 3-chymotrypsin-like protease (3CLpro) against SARS-CoV-2 by the time-dependent inhibition assay (TDI) and mass spectrometry analysis. Further molecular docking, site-directed mutagenesis, circular dichroism (CD) and fluorescence spectra revealed that Danshensu covalently binds to C145 of SARS-CoV-2 3CLpro, meanwhile forming the hydrogen bonds with S144, H163 and E166 in the S1 site. Structure-based optimization of Danshensu led to the discovery of the promising compounds with good inhibitory activity and microsomal stability in vitro. Due to Danshensu inhibiting lung inflammation in the mouse model, we found that Danshensu derivatives also showed better anti-inflammatory activity than Danshensu in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophage cells. Thus, our study provides not only the clue of the efficacy of Salvia miltiorrhiza against SARS-CoV-2, but also a detailed mechanistic insight into the covalent mode of action of Danshensu for design of co-valent inhibitors against SARS-CoV-2 3CLpro, highlighting its potential as a bifunctional molecule with antivirus and anti-inflammation.

关键词： Danshensu SARS-CoV-23CLpro Covalent inhibitor Anti-inflammation Bifunctional molecule

来源：评论

学校读者我要写书评

暂无评论

Characteristics and Sources of Organic Aerosol in PM 2.5 at Yangbajing in Tibetan Plateau

引用

ATMOSPHERIC ENVIRONMENT 2024年 333卷

作者： Xiang, Yaxin Li, xuwen zhang, Tianle Cheng, Qian Yan, Caiqing Liu, Xiaomeng Liu, Yue Wang, Yinan Kang, Shichang Ding, Xiang Zheng, Mei Peking Univ Coll Environm Sci & Engn SKL ESPC Beijing 100871 Peoples R China Peking Univ Ctr Environm & Hlth Beijing 100871 Peoples R China Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Organ Geochem Guangzhou 510640 Peoples R China Chinese Acad Sci Guangzhou Inst Geochem Guangdong Prov Key Lab Environm Protect & Resource Guangzhou 510640 Peoples R China Chinese Acad Sci Guangzhou Inst Geochem Guangdong Hong Kong Macao Joint Lab Environm Pollu Guangzhou 510640 Peoples R China Shandong Univ Environm Res Inst Qingdao 266237 Peoples R China Natl Inst Metrol China Ctr Environm Metrol Beijing 100029 Peoples R China Chinese Acad Sci Inst Atmospher Phys Key Lab Middle Atmosphere & Global Environm Observ Beijing 100029 Peoples R China Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Peoples R China Peking Univ Coll Environm Sci & Engn Beijing 100871 Peoples R China Chinese Acad Sci Guangzhou Inst Geochem Guangzhou 510640 Peoples R China

The climate and environment of the Tibetan Plateau (TP) are sensitive to human activities. As a key component highly influencing global climate and environment, organic aerosol over the TP is investigated in this study, especially in organic composition and its sources. This study aims to explore the composition characteristics, seasonal variation, and potential sources of organic aerosol including two episodes through one-year sampling at the Yangbajing (YBJ) site in the TP. A total of 120 primary and secondary organic species as well as organic carbon (OC) and elemental carbon (EC) were measured in PM2.5. The annual average concentrations of OC, EC, and organic species were 3.12 +/- 3.73 mu gC/m3, 0.28 +/- 0.18 mu gC/m3 and 104 +/- 36.6 ng/m3, respectively. High ratio of OC to EC (OC/EC) and low ratio of fatty acids to n-alkanes were found for aerosol in the TP. The OC/EC ratio was 11.8 +/- 10.2 on average at the YBJ site and strongly correlated with levoglucosan, a tracer for biomass burning, but not so with typical secondary species, indicating that the high ratio of OC/EC over the TP was more influenced by biomass burning than secondary formation. The ratio of fatty acids to n-alkanes at YBJ was 1.39 +/- 0.29 on average, lower than those reported over urban areas (3.13 +/- 1.49), probably owing to less residential cooking activities. Seasonally, the non-monsoon season had significant increases in primary organic aerosol (POA) tracers, among which biomass burning tracers had a higher increase percentage than other specific tracers. On the contrary, the levels of secondary organic aerosol (SOA) tracers, especially isoprene- and monoterpenederived SOA tracers were enhanced in the monsoon season (summer time), largely resulting from high emissions of biogenic volatile organic compounds. Two episodes characterized with much higher concentrations of organic species (1215 and 688 ng/m3) were observed in this study. One was characterized by significant enhancement of P

关键词： Organic speciation Tibetan Plateau Sources Primary organic aerosol Secondary organic aerosol

来源：评论

学校读者我要写书评

暂无评论

NIR light-driven photocatalytic NAD(P)H oxidation and H2O2 generation in situ for enhanced chemodynamic therapy and immune response

引用

NANO TODAY 2023年第1期50卷

作者： zhang, Chao Huang, Jia Guo, Xusheng Da, xuwen Dai, Zhifei Hassan, Moustapha Yu, Yingjie Wang, Xuesong Zhou, Qianxiong Chinese Acad Sci Tech Inst Phys & Chem Key Lab Photochem Convers & Optoelect Mat Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China China Japan Friendship Hosp Dept Hepatobiliary Surg Beijing 100029 Peoples R China Peking Univ Coll Future Technol Natl Biomed Imaging Ctr Dept Biomed Engn Beijing Peoples R China Karolinska Inst Dept Lab Med LABMED Div Expt Canc Med SE-14186 Stockholm Sweden Karolinska Univ Hosp Huddinge Clin Res Ctr SE-14186 Stockholm Sweden Karolinska Univ Hosp Huddinge Ctr Allogene Stem Cell Transplantat CAST SE-14186 Stockholm Sweden Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing Lab Biomed Mat Beijing 100029 Peoples R China

Chemodynamic therapy (CDT) is an appealing cancer treatment that converts endogenous H2O2 into highly toxic hydroxyl radicals to kill cancer cells. However, the limited amount of H2O2 in tumor cells constrains the application of CDT. Therefore, the strategy that can increase H2O2 level in situ could broaden its clinical application. Herein, we synthesized a supramolecule [Ru(bpy)2(Nabpy)](PF6)2 (Ru1) which can efficiently photo-catalyze NAD(P)H oxidation with simultaneous generation of H2O2 with a high yield at 76.4 %. The Ru1 and Fe2+ were then loaded on the mesoporous silica-encapsulated rare earth-doped upconversion nanoparticles (UCSRF), the intracellular H2O2 level can be elevated by 2.8 times upon the irradiation of near-infrared (NIR) light irradiation. Then, the intracellular H2O2 was transformed into hydroxyl radicals through Fenton reaction to achieve efficient CDT both in vitro and in vivo. Furthermore, we demonstrated that UCSRF could effectively enhance immunogenic cell death (ICD) effect, resulting in the reprogramming of the immunosuppressive tumor microenvironment to stimulate immune response. This work represents the first proof-of-concept study on photo-catalytically enhancing H2O2 production in situ upon NIR irradiation for spatiotemporal CDT.(c) 2023 Elsevier Ltd. All rights reserved.

关键词： Chemodynamic therapy Photocatalytic NAD(P)H oxidation Immunotherapy Upconversion nanoparticle

来源：评论

学校读者我要写书评

暂无评论

Seismic performance of a new type of precast shear walls with non-connected vertical distributed reinforcement

引用

JOURNAL OF BUILDING ENGINEERING 2021年 44卷

作者： Liao, Xiandong zhang, Shiqian Cao, Zhiwei Xiao, xuwen China Construct Eighth Engn Div Co Ltd Shanghai 200112 Peoples R China Tongji Univ Dept Struct Engn Shanghai 200092 Peoples R China China State Construct Engn Corp Beijing 100029 Peoples R China

To eliminate the shortcomings in the grouting sleeve and other connection forms in precast concrete shear wall structure induced by the poor grouting, difficult quality assurance, low construction efficiency, and high cost, a new type of monolithic assembled concrete shear wall structure with non-connected vertical distributed reinforcement was proposed in this paper. The new shear wall structure is composed of middle precast wall panels and cast-in-place boundary members. The vertical distributed reinforcement in the middle precast wall panels is not connected between the upper and lower floors. This technique was based on the normal section bearing capacity of equal strength and inclined section bearing capacity of equal strength compared with the cast-in-place shear wall structure. Three full-scale models of precast shear walls and one cast-in-place contrast specimen were tested for their seismic performance under pseudo-static loading. All precast specimens are cast based on the manufacture specification of the factory. By analysis of test results, including the failure modes, load-lateral drift hysteresis curves, bearing capacity, hysteretic characteristics, deformation components, ductility, rigidity degeneration, energy dissipation, and strain distribution, all the specimens were obtained and compared. Comparisons between test results indicate that the proposed shear walls have a similar bearing capacity as that of the cast-in-place shear wall and improved energy dissipation and ductility. Moreover, the specimen with inclined reinforcement performs better in drift capacity compared to companion specimens. The contribution of flexural deformation to the total displacement of each specimen is the largest, follow by the contribution of shear deformation, and the contribution of slip is the smallest. The strain of non-connected vertical distributed reinforcement of the precast panel did not yield during the loading process. The cross-section of the precast shear

关键词： Precast concrete shear wall Non-connected vertical distributed reinforcement Equal strength Pseudo-static Deformation Strain distribution

来源：评论

学校读者我要写书评

暂无评论

Coacervation-driven instant paintable underwater adhesives with tunable optical and electrochromic properties

引用

JOURNAL OF MATERIALS CHEMISTRY A 2021年第22期9卷 12988-13000页

作者： Peng, Qiongyao Chen, Jingsi Wang, Tao Gong, Lu Peng, xuwen Wu, Meng Ma, Yuhao Wu, Feiyi Yang, Diling zhang, Hao Zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Univ Alberta Dept Biomed Engn Edmonton AB T6G 2V2 Canada

Coacervation generally refers to liquid-liquid phase separation when mixing oppositely charged polyelectrolytes in an aqueous solution, which produces a polyelectrolyte-dense coacervate phase in a dilute solution phase. Coacervation plays a crucial role in many biological processes such as the versatile underwater adhesion of sessile organisms, cellular compartmentalization, and cell replication, which inspires a surge of biomimetic designs of underwater adhesives. However, conventional coacervate-based underwater adhesives are usually weak and lack functionalities, limiting their practical applications in biomedical and engineering fields. Herein, a novel instant underwater adhesive is presented based on coacervation via one-step mixing of aqueous solutions of silicotungstic acid (SiW) and poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) micelles, driven by hydrogen-bonding and hydrophobic interactions. The as-prepared adhesive possesses instant and excellent underwater adhesion (up to 479.6 kPa on poly(methyl methacrylate)) and can be facilely painted underwater on diverse substrates, showing resistance to water flush as well as repeatable stretching and bending of the substrates, superior to many previously reported coacervates. The adhesive also exhibits outstanding stability in high-salt aqueous solutions up to 3 M for at least 1200 h. The introduction of P123 endows the adhesives with thermo-responsive optical properties, while the innate reduction-related color switch of SiW offers electrochromic properties. The functional adhesives hold great promise in bioengineering applications and for the fabrication of novel flexible electronics such as smart aqueous batteries and low-power electrochromic windows.

关键词： Substrates

来源：评论

学校读者我要写书评

暂无评论

Effect of planting salt-tolerant legumes on coastal saline soil nutrient availability and microbial communities

引用

JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023年第1期345卷 118574页

作者： Zheng, Yanfen Cao, xuwen Zhou, Yanan Li, Zhe Yang, Yanzhe Zhao, Donglin Li, Yiqiang Xu, Zongchang zhang, Cheng-Sheng Chinese Acad Agr Sci Tobacco Res Inst Marine Agr Res Ctr Qingdao 266101 Peoples R China Shandong Univ Inst Marine Sci & Technol Qingdao 266200 Peoples R China Natl Ctr Technol Innovat Comprehens Utilizat Salin Dongying 257300 Peoples R China

Soil salinization is a serious global environmental problem affecting sustainable development of agriculture. Legumes are excellent candidates for the phytoremediation of saline soils;however, how soil microbes mediate the amelioration of coastal saline ecosystems is unknown. In this study, two salt-tolerant legumes, Glycine soja and Sesbania cannabina were planted in coastal saline soil for three years. Soil nutrient availability and microbiota structure (including bacteria, fungi, and diazotrophs) were compared between the phytoremediated soils and control soil (barren land). Planting legumes reduced soil salinity, and increased total carbon, total nitrogen, and NO3  -N contents. Among the soil microbiota, some nitrogen-fixing bacteria (e.g., Azotobacter) were enriched in legumes, which were probably responsible for soil nitrogen accumulation. The complexity of the bacterial, fungal, and diazotrophic networks increased significantly from the control to the phytoremediated soils, suggesting that the soil microbial community formed closer ecological interactions during remediation. Furthermore, the dominant microbial functions were chemoheterotrophy (24.75%) and aerobic chemoheterotrophy (21.97%) involved in the carbon cycle, followed by nitrification (13.68%) and aerobic ammonia oxidation (13.34%) involved in the nitrogen cycle. Overall, our findings suggested that G. soja and S. cannabina legumes were suitable for ameliorating saline soils as they decreased soil salinity and increased soil nutrient content, with microorganisms especially nitrogen-fixing bacteria, playing an important role in this remediation process.

关键词： Phytoremediation Saline soil Nitrogen Microbial community Salt-tolerant legume

来源：评论

学校读者我要写书评

暂无评论

炙甘草汤的理论梳理及其治疗病毒性心肌炎的研究进展

引用

陕西中医 2018年第5期39卷 678-681页

作者：张序文陈晓上海中医药大学基础医学院上海201203

目的:探讨炙甘草汤对病毒性心肌炎的治疗效果。方法:简要梳理《伤寒论》炙甘草汤方的适应症、组方及煎煮法;并综述近10年来应用炙甘草汤治疗病毒性心肌炎的基础与临床研究文献。结果:炙甘草汤最初的适应症为伤寒后"脉结代,心动悸&q... 详细信息

目的:探讨炙甘草汤对病毒性心肌炎的治疗效果。方法:简要梳理《伤寒论》炙甘草汤方的适应症、组方及煎煮法;并综述近10年来应用炙甘草汤治疗病毒性心肌炎的基础与临床研究文献。结果:炙甘草汤最初的适应症为伤寒后"脉结代,心动悸",与现代医学对病毒性心肌炎的认识较为符合;实验研究证实炙甘草汤具有抗病毒作用、心肌细胞保护作用以及抗心律失常作用;在临床治疗中,炙甘草汤主要用于病毒性心肌炎的恢复期符合气血阴阳俱虚证者,其在与西药联合应用时疗效明显优于单纯西药组,并且安全无不良反应。

关键词：心肌炎/中医药疗法炙甘草汤/治疗应用综述

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：