检索结果-南通市图书馆

Numerical study of a 20W class QCW pulsed sodium guide star laser's performances at five sites in China

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2021年第9期21卷 44-52页

作者： Hong-Yang Li Lu Feng jun-wei zuo Qi Bian Bo-Tian Sun Sui-Jian Xue Zhi-Xia Shen Yang-Peng Li Yong Bo CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Physics University of CaliforniaSanta BarbaraCA 93106USA

In the past few years,Chinese astronomical community is actively testing astronomical sites for several new optical/infrared ground-based *** site testing campaigns conducted were mainly focused on fundamental performances of the sites,such as cloud coverage,seeing,temperature,*** increasing interests in sodium laser guide star adaptive optics for these new telescopes in the Chinese astronomical community,it is interesting to investigate the performance of the laser guide star at these sites,especially considering that the sodium laser guide star’s on-sky performance is significantly influenced by sites’local performances,such as geomagnetic field,sodium layer dynamics,density of air molecule,*** this paper,we studied sodium laser guide star’s performance of a 20 W class Quasi Continuous Wave(QCW)pulsed laser developed by TIPC with numerical simulation for five selected sites in China.

关键词： instrumentation:adaptive optics methods:numerical site testing

High-power wavelength-tunable and power-ratio-controllable dual-wavelength operation at 1319 nm and 1338 nm in a Q-switched Nd:YAG laser

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2022年第10期10卷 2287-2292页

作者： QI BIAN YONG BO jun-wei zuo LEI YUAN HONG-wei GAO QIN-jun PENG Key Laboratory of Solid State Laser Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Functional Crystal and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Optical Physics and Engineering Technology Qilu ZhongkeJinan 250000China

We report the first demonstration on three types of 1.3 μm spectral region in a Q-switched Nd:YAG laser. In order to dissipate the heat deposition effectively to obtain good beam quality, the Nd:YAG rod crystal with 1° cut-angle on end faces is side-pumped by the quasi-continuous-wave pulsed laser diode. A Suprasil etalon is well designed as the intracavity mode-selector to obtain wavelength-tunable single line or power-ratio-controllable dual line operation at1319 nm and 1338 nm. With the pump pulse width of 200 μs and pump power of 410 W, the acousto-optic Q-switched laser delivered a pulse width of 117 ns at 400 Hz repetition rate, and the M2factor was measured to be about 1.87. 1319 nm together with 1338 nm single-wavelength laser achieved an average output power of 47.6 W and 39.9 W with a linewidth of 0.48 nm and 0.32 nm, and a tunable range of 111.2 pm and108.6 pm, respectively. Among dual-wavelength oscillation, both lines can be tuned at almost equal intensity level with 45.7 W total output power, which is input into an LBO crystal to generate red light of 11.4 W for 659 nm,6.7 W for 664 nm, and 7.5 W for 669 nm. The 1.3 μm wavelength-selectable operation realized by using the same laser configuration may enhance the application in the fields of tunable lasers and THz frequency generation.

关键词： Nd:YAG switched tunable

First light for the sodium laser guide star adaptive optics system on the Lijiang 1.8 m telescope

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2016年第12期16卷 41-45页

作者： Kai wei Min Li Shan-Qiu Chen Yong Bo Feng Chen jun-wei zuo Qi Bian Ji Yao Lu-Chun Zhou Lin wei Dong-Hong Chen Yang Gao KaiJin Xiao-Lin Dai Han-Chu Fu Chang Xu Zhi-Chao Wang Xiang-Hui Xue Xue-Wu Chen Xian-Mei Qian Yu Zhou Hao Xian Qin-jun Peng Chang-Hui Rao Zu-Yan Xu Yu-Dong Zhang Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China Research Center for Laser Physics and Technique Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of-Science and Technology of China Hefei 230036China Wuhan Institute of Physics and Mathematics Chinese Academy of SciencesWuhan 430071China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei 230031China Yunnan Observatories Chinese Academy of SciencesKunming 650200China University of Chinese Academy of Sciences Beijing 100049China

A first generation sodium Laser Guide Star Adaptive Optics System （LGS-AOS） was developed and integrated into the Lijiang 1.8 m telescope in 2013. The LGS-AOS has three sub-systems：（1） a 20W long pulsed sodium laser, （2） a 300-millimeter-diameter laser launch telescope, and （3） a 37-element com- pact adaptive optics system. On 2014 January 25, we obtained high resolution images of an my 8.18 star, HIP 43963, during the first light of the LGS-AOS. In this paper, the sodium laser, the laser launch telescope, the compact adaptive optics system and the first light results will be presented.

关键词： instrumentation: adaptive optics -- turbulence -- atmospheric effects

高分子有机膜亲水改性及光催化改性的研究进展

在线全文

学校读者我要写书评

暂无评论

环境科学与技术 2017年第6期40卷 114-119页

作者：詹巍张军左薇李宁孙志才田禹哈尔滨工业大学市政环境工程学院城市水资源与水环境国家重点实验室黑龙江哈尔滨150090 大庆市自来水有限公司黑龙江大庆163311

随着高分子有机膜材料在水处理领域中应用的不断加深,膜法水处理技术以其优越的性能,成为中国水质高效处理的主导技术。但膜污染却成为阻碍膜法水处理技术发展的关键性问题,如何有效抑制膜污染的发生关系着膜法水处理技术未来发展的前景... 详细信息

随着高分子有机膜材料在水处理领域中应用的不断加深,膜法水处理技术以其优越的性能,成为中国水质高效处理的主导技术。但膜污染却成为阻碍膜法水处理技术发展的关键性问题,如何有效抑制膜污染的发生关系着膜法水处理技术未来发展的前景,目前已成为众多学者开展研究的核心方向。膜改性技术能够赋予现有膜材料新的功能特性,满足膜材料适用于处理各种复杂水质的同时能够抑制膜污染的发生,成为推动膜法水处理发展的前沿方向。膜亲水改性通过将疏水性的膜材料转变为亲水性,提高其抗污染性能。膜光催化改性通过将光催化剂与膜材料相结合,实现膜分离与污染物光催化降解相耦合,可有效抑制膜污染的发生。文章阐述了目前高分子有机膜材料主要的亲水改性技术,并介绍了膜改性新方向-光催化改性的常用方法。

关键词：高分子有机膜膜污染亲水改性光催化改性

From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 464-475页

作者： Zhonghua Lu jun Shen Xin Zhang Lingcong Chao Liang Chen Ding Zhang Tao wei Shoudong Xu College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely recognized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon materials anode potassium-ion batteries high value-added

Infiltration by monocytes of the central nervous system and its role in multiple sclerosis: reflections on therapeutic strategies

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 779-793页

作者： Guangyong Zhang Qing Yao Chubing Long Pengcheng Yi Jiali Song Luojia Wu wei Wan Xiuqin Rao Yue Lin Gen wei jun Ying Fuzhou Hua Department of Anesthesiology the Second Affiliated Hospital of Nanchang UniversityNanchangJiangxi ProvinceChina Key Laboratory of Anesthesiology of Jiangxi Province NanchangJiangxi ProvinceChina

Mononuclear macrophage infiltration in the central nervous system is a prominent feature of neuroinflammation. Recent studies on the pathogenesis and progression of multiple sclerosis have highlighted the multiple roles of mononuclear macrophages in the neuroinflammatory process. Monocytes play a significant role in neuroinflammation, and managing neuroinflammation by manipulating peripheral monocytes stands out as an effective strategy for the treatment of multiple sclerosis, leading to improved patient outcomes. This review outlines the steps involved in the entry of myeloid monocytes into the central nervous system that are targets for effective intervention: the activation of bone marrow hematopoiesis, migration of monocytes in the blood, and penetration of the blood–brain barrier by monocytes. Finally, we summarize the different monocyte subpopulations and their effects on the central nervous system based on phenotypic differences. As activated microglia resemble monocyte-derived macrophages, it is important to accurately identify the role of monocyte-derived macrophages in disease. Depending on the roles played by monocyte-derived macrophages at different stages of the disease, several of these processes can be interrupted to limit neuroinflammation and improve patient prognosis. Here, we discuss possible strategies to target monocytes in neurological diseases, focusing on three key aspects of monocyte infiltration into the central nervous system, to provide new ideas for the treatment of neurodegenerative diseases.

关键词： blood–brain barrier macrophages monocytes multiple sclerosis neuroinflammation review therapy

Effects of ultrasonic-assisted extraction on bioactive compounds,volatile flavors and antioxidant activities of vine tea water extracts

在线全文

学校读者我要写书评

暂无评论

Traditional Medicine Research 2025年第1期10卷 73-81页

作者： Xiao-Long Zhou wei-Jin Jiang Ji Yu Mao-jun Yao Yun-Tong Li Hunan Provincial Key Laboratory of Research Resource Mining and High-valued Utilization on Edible&Medicinal PlantCollege of Chemistry and Chemical EngineeringJishou UniversityJishou 416000China Hunan Gaoge Dairy Co. Ltd.Changsha 410000China

Background:Ampelopsis grossedentata,vine tea,which is the tea alternative beverages in *** vine tea processing,a large amount of broken tea is produced,which has low commercial ***:This study investigates the influence of different extraction methods(room temperature water extraction,boiling water extraction,ultrasonic-assisted room temperature water extraction,and ultrasonic-assisted boiling water extraction,referred to as room temperature water extraction(RE),boiling water extraction(BE),ultrasonic assistance at room temperature water extraction(URE),and ultrasonic assistance in boiling water extraction(UBE))on the yield,dihydromyricetin(DMY)content,free amino acid composition,volatile aroma components,and antioxidant properties of vine tea ***:A notable influence of extraction temperature on the yield of vine tea extracts(P<0.05),with BE yielding the highest at 43.13±0.26%,higher than that of RE(34.29±0.81%).Ultrasound-assisted extraction significantly increased the DMY content of the extracts(P<0.05),whereas DMY content in the RE extracts was 59.94±1.70%,that of URE reached 66.14±2.78%.Analysis revealed 17 amino acids,with L-serine and aspartic acid being the most abundant in the extracts,nevertheless ultrasound-assisted extraction reduced total free amino acid *** chromatography-mass spectrometry analysis demonstrated an increase in the diversity and quantity of compounds in the vine tea water extracts obtained through ultrasonic-assisted ***,69 and 68 volatile compounds were found in URE and UBE extracts,which were higher than the number found in RE and BE *** vitro,antioxidant activity assessments revealed varying antioxidant capacities among different extraction methods,with RE exhibiting the highest DPPH scavenging rate,URE leading in ABTS•+free radical scavenging,and BE demonstrating superior ferric ion reducing antioxidant ***:The findings suggest that extraction methods signi

关键词： vine tea dihydromyricetin ultrasonic-assisted extraction volatile aroma components

Selective adsorption of tetracycline by β-CD-immobilized sodium alginate aerogel coupled with ultrafiltration for reclaimed water

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第4期68卷 27-34页

作者： Xi Quan jun Zhang Linlin Yin wei zuo Yu Tian State Key Laboratory of Urban Water Resource and Environment(SKLUWRE) School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

In this work,a novel composite material based on β-cyclodextrin-immobilized sodium alginate aerogel(β-CD/NaAlg) was developed utilizing cross-linker of epichlorohydrin and applied as an adsorbent to remove tetracycline antibiotics from reclaimed wastewater.A series of characterizations were utilized to confirm the successful synthesis of the adsorbent and this β-CD/NaAlg presented a three-dimensional network at the nanoscale or *** optimal conditions(pH=4,t=8 h,β-CD:NaAlg=9,adsorbent dosage = 1.5 g·L-1),the maximum removal rate of β-CD/NaAlg to tetracycline was 70%.The adsorption behavior of tetracycline on β-CD/NaAlg conformed to the Freundlich isotherm model(R2=0.9977) and the pseudo-second-order kinetic model(R^(2)=0.9993).Moreover,the adsorbent still removed 55.3% of tetracycline after five ***,the adsorbent was integrated with ultrafiltration to adsorb tetracycline antibiotics from simulated reclaimed wastewater,and the removal rate of tetracycline reached 78.9% within 2 *** existence of Cr(Ⅵ) had a negligible impact on tetracycline removal,while the presence of humic acid exhibited a promoting *** possible adsorption mechanisms were also elucidated through X-ray photoelectron spectroscopy and density functional theory *** summary,β-CD/NaAlg represents an environmentally friendly,efficient,and sustainable adsorbent for removing tetracycline antibiotics from reclaimed water.

关键词： b-CD/NaAlg aerogel Covalent grafting Tetracycline antibiotics Ultrafiltration Selective adsorption Reclaimed water

3D FEM SYSTEM FOR ANALYSIS OF NDUSTRIAL METAL FORMING PROCESSES

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第2期9卷 39-44页

作者： zuo, Xu wei, Yuanping Chen, jun Zeng, Lingshou Ruan, Xueyu Shanghai Jiao Tong Univ Shanghai China

１ＩＮＴＲＯＤＵＣＴＩＯＮＤｕｅｔｏｔｈｅｌａｃｋｏｆｓｙｓｔｅｍａｔｉｃａｎａｌｙｓｉｓｔｏｏｌｓ，ｍｅｔａｌｆｏｒｍｉｎｇｄｅｓｉｇｎｉｓｈｉｇｈｌｙｂａｓｅｄｏｎｅｍｐｉｒｉｃａｌｉｄｅａ，ｌｏｔｓｏｆｔｉｍｅ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＤｕｅｔｏｔｈｅｌａｃｋｏｆｓｙｓｔｅｍａｔｉｃａｎａｌｙｓｉｓｔｏｏｌｓ，ｍｅｔａｌｆｏｒｍｉｎｇｄｅｓｉｇｎｉｓｈｉｇｈｌｙｂａｓｅｄｏｎｅｍｐｉｒｉｃａｌｉｄｅａ，ｌｏｔｓｏｆｔｉｍｅｃｏｎｓｕｍｉｎｇａｎｄｅｘｐｅｎ...

关键词： bulk formingrigidviscoplastic finite element methodremeshing