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Manipulating vector solitons with super-sech pulse shapes
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作者 Yan Zhou Keyun Zhang +4 位作者 Chun Luo Xiaoyan Lin Meisong Liao guoying zhao Yongzheng Fang 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第5期317-324,共8页
Theoretical simulations about manipulating vector solitons with super-sech pulse shapes are conducted based on an optical fiber system.By changing the temporal pulses’parameters when the orthogonally polarized pulses... Theoretical simulations about manipulating vector solitons with super-sech pulse shapes are conducted based on an optical fiber system.By changing the temporal pulses’parameters when the orthogonally polarized pulses have the same or different input central wavelengths,the output modes in orthogonal directions will demonstrate different properties.When the input orthogonal modes have the same central wavelength,the“2+2”pseudo-high-order vector soliton can be generated when the time delay is changed.While under the condition of different central wavelengths,orthogonal pulses with multiple peaks accompanied with two wavelengths can be achieved through varying the projection angle,time delay or phase difference.Our simulations are helpful to the study of optical soliton dynamics in optical fiber systems. 展开更多
关键词 vector soliton super-sech central wavelength MANIPULATION optical fiber
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Polarization manipulation of bright-dark vector bisolitons
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作者 Yan Zhou Xiaoyan Lin +2 位作者 Meisong Liao guoying zhao Yongzheng Fang 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第3期306-313,共8页
We simulate the polarization manipulation of bright-dark vector bisolitons at 1-µm wavelength regime.Through changing the pulse parameters,different kinds of pulse shapes and optical spectra are generated in outp... We simulate the polarization manipulation of bright-dark vector bisolitons at 1-µm wavelength regime.Through changing the pulse parameters,different kinds of pulse shapes and optical spectra are generated in output orthogonal polarization directions.When the input vector bisoliton is polarization-locked with 1064 nm central wavelength,“1+1”fundamental dark-dark and“2+1”pseudo-high-order bright-dark group-velocity-locked vector solitons can be achieved through changing the projection angle.When the input vector bisoliton is group-velocity-locked with 1063 nm and 1065 nm central wavelengths,“2+1”and“2+2”pseudo-high-order bright-dark group-velocity-locked vector solitons,bright-dark group-velocity-locked vector solitons with chirp-like temporal oscillations are generated.Our simulation results can provide beneficial conduct for polarization manipulation of vector multi-solitons,and have promising applications in quantum information register,optical communications,nanophotonics,and all-optical switching. 展开更多
关键词 polarization manipulation vector bisoliton polarization-locking group-velocity-locking linear birefringence
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Effect of nonlinear translations on the pulsation of cavitation bubbles
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作者 Lingling Zhang Weizhong Chen +3 位作者 Yang Shen Yaorong Wu guoying zhao Shaoyang Kou 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第4期381-384,共4页
The pulsations and translations of cavitation bubbles obey combined ordinary differential equations,and their nonlinearities are studied by the bifurcation diagram and the phase diagram in a strong ultrasonic field.Bu... The pulsations and translations of cavitation bubbles obey combined ordinary differential equations,and their nonlinearities are studied by the bifurcation diagram and the phase diagram in a strong ultrasonic field.Bubble pulsation can change regularly or irregularly with changing driving pressure in the time domain.The bifurcation diagrams of the pulsation versus driving pressure show that the pulsations and translations of bubbles have nonlinear characteristics,and the nonlinear translations of bubbles can disorder the pulsations for certain parameters.Disorder of the pulsation can also be caused by nonlinear pulsation itself.In addition,the phase diagrams also show that the nonlinear translations make a large contribution to the pulsations.The same result can also be obtained when the ambient radii of two bubbles are different. 展开更多
关键词 bubble pulsation bubble translation nonlinear characteristics
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The Design of GECAM Scientific Ground Segment
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作者 Shijie Zheng Liming Song +39 位作者 Xiang Ma Ping Wang Rui Qiao Yue Huang Xiaoyun zhao Hongmei Zhang Xiaobo Li Mingyu Ge Gang Chen Gongxing Sun Wenxi Peng Ce Cai Wei Chen Yanqi Du Dongya Guo Bing Li Chaoyang Li Jianhui Li Qingxin Li Jing Liang Jiacong Liu Ge Ou Dongli Shi Jingyan Shi Xinying Song Jin Wang Wenshuai Wang Hong Wu Shuo Xiao Wangchen Xue Min Yao Jianying Ye Kai Zhang Peng Zhang Xiaolu Zhang Yanqiu Zhang guoying zhao Shiyi zhao Chao Zheng Shaolin Xiong 《Research in Astronomy and Astrophysics》 SCIE CAS 2024年第10期1-10,共10页
The Gravitational wave burst high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)is a dedicated mission for monitoring high-energy transients.Here we report the design of the GECAM Scientific Ground Segment(... The Gravitational wave burst high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)is a dedicated mission for monitoring high-energy transients.Here we report the design of the GECAM Scientific Ground Segment(GSGS)in terms of the scientific requirements,including the architecture,the external interfaces,the main function,and workflow.Judging from the analysis and verification results during the commissioning phase,the GSGS functions well and is able to monitor the status of the payloads,adjust the parameters,develop the scientific observation plans,generate the scientific data products,analyze the data,etc.Thus,the on-orbit operation and scientific researches of GECAM are guaranteed. 展开更多
关键词 gravitational waves gamma-rays:general telescopes
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烯烃和CO_(2)直接合成环状碳酸酯的催化剂研究进展 被引量:4
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作者 胡启鲁 赵国英 于彩虹 《过程工程学报》 CAS CSCD 北大核心 2021年第7期762-773,共12页
利用丰富且价廉易得的烯烃和CO_(2)直接反应可提供一种经济安全环保的高附加值环状碳酸酯生产工艺,具有减少CO_(2)排放、缓解温室效应等优点。本工作以一步氧化羧化、顺序氧化羧化以及羟溴化羧化三种方法为主线,综述了近年来烯烃和CO_(2... 利用丰富且价廉易得的烯烃和CO_(2)直接反应可提供一种经济安全环保的高附加值环状碳酸酯生产工艺,具有减少CO_(2)排放、缓解温室效应等优点。本工作以一步氧化羧化、顺序氧化羧化以及羟溴化羧化三种方法为主线,综述了近年来烯烃和CO_(2)直接制备环状碳酸酯相关催化剂的研究进展,包括用于氧化羧化反应的催化剂,主要是同时具有烯烃环氧化催化功能和CO_(2)羧化功能的多组分组合催化剂和多活性位点的单一催化剂,如金属氧化物、金属配合物、离子液体、改性分子筛、金属有机骨架化合物等;以及作用于羟溴化羧化反应的含Br-, I-阴离子的卤代试剂-无机/有机碱脱质子试剂组合催化剂。同时对未来烯烃和CO_(2)制备环状碳酸酯反应的催化剂的设计及工艺开发进行了展望。 展开更多
关键词 烯烃 环氧化 羟溴化 二氧化碳 羧化 环状碳酸酯
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离子液体自模板合成多孔碳氮材料及其对二氧化碳的吸附 被引量:3
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作者 刘佳慧 刘会婷 +1 位作者 赵国英 孙振宇 《过程工程学报》 CAS CSCD 北大核心 2020年第1期108-115,共8页
以多种氰基离子液体为前驱体,采用高温碳化法直接制备多孔碳氮材料,系统考察了离子液体前驱体阳离子结构、阴离子种类及合成条件等因素对碳化材料比表面积、氮元素含量及氮种类的影响,并研究其对CO2的吸附性能。结果表明,阴离子在聚合... 以多种氰基离子液体为前驱体,采用高温碳化法直接制备多孔碳氮材料,系统考察了离子液体前驱体阳离子结构、阴离子种类及合成条件等因素对碳化材料比表面积、氮元素含量及氮种类的影响,并研究其对CO2的吸附性能。结果表明,阴离子在聚合过程中起模板剂的作用。合成材料主要呈介孔结构,比表面积最高达732.6 m^2/g,氮含量最高为9.9wt%,在温度25℃、压力1.8 MPa条件下,CO2的吸附量最高达20.9wt%。多孔碳氮材料经180℃真空加热后可完全脱附再生,再生稳定性良好。 展开更多
关键词 离子液体 前驱体 多孔碳氮材料 CO2 吸附
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12-Tungstophosphoric acid niched in Zr-based metal-organic framework:a stable and efficient catalyst for Friedel-Crafts acylation 被引量:4
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作者 Latif Ullah guoying zhao +3 位作者 Zichen Xu Hongyan He Muhammad Usman Suojiang Zhang 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第4期402-411,共10页
Heteropoly acids(HPA) are well known for their versatile solid acid catalysis in diverse chemical reactions, however they suffer from low surface area(<10 m^2/g) and leaching into the reactions media, which reduce ... Heteropoly acids(HPA) are well known for their versatile solid acid catalysis in diverse chemical reactions, however they suffer from low surface area(<10 m^2/g) and leaching into the reactions media, which reduce their prospects as industrial catalyst.Herein, a novel hybrid material HPW@Zr-BTC,composed of 12-tungstophoric acid(HPW) and Zr^(Ⅳ)-benzene tri-carboxylate(Zr-BTC) metal-organic framework(MOF), was prepared via one-pot solvothermal method. Excellent HPW loading up to 32.3 wt% was achieved, and HPW@Zr-BTC composite proved to be highly stable, besides the crystalline morphology of Zr-BTC was intact. The catalytic activity of the hybrid composite was explored via Friedel-Crafts acylation of anisole with benzoyl chloride.The 28.2 wt% HPW@Zr-BTC showed excellent catalytic performance, with 99.4% anisole conversion and 97.6% yield(pmethoxybenzophenone) under solvent free conditions. Excellent retention of catalytic activity was achieved after at least five consecutive runs due to non-observable HPW leaching. The promising activity and stability of the catalyst forecasted its potential industrial applications. 展开更多
关键词 dodeca-tungstophosphoric acid Zr-BTC metal-organic frameworks one-pot solvothermal synthesis HETEROGENEOUSCATALYSIS anisole acylation high temperature XRD
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低场MRI原位研究离子液体合成及相态变化
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作者 刘亚迪 Niklas Hedin +2 位作者 贾利娜 赵国英 聂毅 《过程工程学报》 CAS CSCD 北大核心 2020年第7期807-821,共15页
离子液体作为一个平台化合物已经在诸多领域得到广泛应用,但离子液体的生产成本仍然是限制其进一步工业化推广的瓶颈之一。深入研究反应动力学、反应传递耦合规律对优化离子液体合成工艺/关键设备,降低大规模离子液体制备成本至关重要... 离子液体作为一个平台化合物已经在诸多领域得到广泛应用,但离子液体的生产成本仍然是限制其进一步工业化推广的瓶颈之一。深入研究反应动力学、反应传递耦合规律对优化离子液体合成工艺/关键设备,降低大规模离子液体制备成本至关重要。本研究用一个原位低场磁共振成像(MRI)设备实时监测ILs合成过程中的反应动力学和相态变化。通过建立双组分分析模型,即1H低场核磁共振(LF-NMR)弛豫法对反应体系中的各个组分进行定量分析,并采集MRI图像记录相位分离和倒置过程,系统考察了卤代烷烃的链长、卤素种类、搅拌速度、反应温度等对咪唑类离子液体反应动力学的影响规律。对溴丁烷、甲基咪唑合成溴代1-丁基-3-甲基咪唑类离子液体合成过程中相态变化进行了实时动态观测。本研究为检测离子液体反应过程及有机溶剂中离子液体的残余量提供一种快速、便利、无损的检测方法,有望利用低场MRI对离子液体系统中传质和反应动力学的结合研究做进一步探索。 展开更多
关键词 离子液体 无溶剂合成 磁共振成像 反应动力学 相态变化
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Teaching and practice of pharmaceutical comprehensive study in China 被引量:4
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作者 Chao Wang Xu Wang +5 位作者 guoying zhao Guiling Wang Jianguo Zhang Xin Hu Min Ye Ping Xu 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2019年第3期209-215,共7页
Pharmaceutical comprehensive study(PCS) is a new system of experimental teaching in China, which integrates multidisciplinary pharmaceutical knowledge and covers the basic process of new drug discovery. To explore the... Pharmaceutical comprehensive study(PCS) is a new system of experimental teaching in China, which integrates multidisciplinary pharmaceutical knowledge and covers the basic process of new drug discovery. To explore the feasibility of this experiment teaching system and mode, we developed PCS as an elective course. The PCS is designed with two sections: pharmaceutical comprehensive design(PCD) and pharmaceutical comprehensive experiment(PCE). The PCD section includes literature review, comprehensive project design and oral examination. PCE can be divided into four parts: synthesis, quantitative determination, pharmacodynamic evaluation, and formulation and quality determination. Course grade was determined by experimental performance, written report, literature review, new project design and oral examination. The learning interest, experimental ability, theoretical level and literature retrieval ability, team spirit and interpersonal skills have been all significantly improved among students taking this course. A survey was administered at the end of the semester to the enrolled students. The responses were reported as percentages, and the feedback was positive. The course was highly recommended by the teaching inspection committee. This new course plays an important role in developing students’ creativity and comprehensive ability. It could help students understand the focus and features of every secondary discipline, as well as establish scientific and reasonable knowledge system. Most students can better understand the process of drug research after this course. 展开更多
关键词 Pharmaceutical comprehensive experiment UNDERGRADUATE MULTIDISCIPLINARY Pharmaceutical sciences Experiment teaching
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Properties and Structures of Bi_2O_3-B_2O_3-TeO_2 Glass 被引量:2
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作者 guoying zhao Ying Tian +2 位作者 Huiyan Fan Junjie Zhang Lili Hu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2013年第3期209-214,共6页
Glass formation range of Bi2O3-B2O3-TeO2 system has been investigated (B2O3 ≤ 40 mol%). Four glasses with compositions xBi2O3-B2O3-(70-x)TeO2 (x = 40, 50, 60 and 70 tool%) have been prepared by using melt quenc... Glass formation range of Bi2O3-B2O3-TeO2 system has been investigated (B2O3 ≤ 40 mol%). Four glasses with compositions xBi2O3-B2O3-(70-x)TeO2 (x = 40, 50, 60 and 70 tool%) have been prepared by using melt quenching technique. The effect of Bi2O3 content on thermal stability, optical properties and structures of these four Bi2O3-B2O3-TeO2 glasses is systematically investigated by inductive coupled plasma emission spectrometer (ICP), differential scanning calorimetry (DSC), Raman spectra and X-ray photoelectron spectroscopy (XPS). It is found that the density, refractive index and optical basicity increase with increasing Bi2O3. The Raman spectra and XPS spectra show that the glass network is mainly constituted by the [BiO6] octahedron, [TeO4] trigonal bipyramidal, [TeO3] trigonal pyramid, [BO3] trigonal pyramid and [B04] tetrahedron structural units. With increasing Bi2O3, the coordination number around B atom changes from 3 to 4 and [TeO4] units are converted to [TeO3] units. Bi5+ ions may exist in Bi2O3-B2O3-TeO2 (BBT) system and their amount grows with increasing Bi2O3 content. 展开更多
关键词 Bismuth glass Glass forming region Raman and X-ray photoelectron spectroscopy (XPS) spectra
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Erratum on “12-tungstophosphoric acid niched in Zr-BTC: a stable and efficient catalyst for Friedel-Crafts acylation” [Sci.China Chem., 2018, 61: 402–411]
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作者 Latif Ullah guoying zhao +3 位作者 Zichen Xu Hongyan He Muhammad Usman Suojiang Zhang 《Science China Chemistry》 SCIE EI CSCD 2021年第8期1434-1434,共1页
Erratum to:Sci China Chem,2018,61:402-411,https://doi.org/10.1007/sll426-017-9182-0 For the above referenced publication[1],there is a correction in the Figure 9.Figure 9 Catalytic activity of pristine Zr-BTC(a),18.6 ... Erratum to:Sci China Chem,2018,61:402-411,https://doi.org/10.1007/sll426-017-9182-0 For the above referenced publication[1],there is a correction in the Figure 9.Figure 9 Catalytic activity of pristine Zr-BTC(a),18.6 wt%HPW@Zr-BTC(b),25.2 wt%HPW@Zr-BTC(c). 展开更多
关键词 FIGURE CATALYST CORRECTION
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