检索结果-南通市图书馆

Transient breathing dynamics during extinction of dissipative solitons in mode‑locked fiber lasers

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2024年第1期17卷 9-19页

作者： Zichuan Yuan Si Luo Ke Dai xiankun yao Chenning Tao Qiang Ling Yusheng Zhang Zuguang Guan Daru Chen Yudong Cui Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Optical Information Detection and Display Technology of Zhejiang Zhejiang Normal UniversityJinhua 321004China School of Physics Northwest UniversityXi’an 710127China

The utilization of the dispersive Fourier transformation approach has enabled comprehensive observation of the birth process of dissipative solitons in fiber ***,there is still a dearth of deep understanding regarding the extinction process of dissipative *** this study,we have utilized a combination of experimental and numerical techniques to thoroughly examine the breathing dynamics of dissipative solitons during the extinction process in an Er-doped mode-locked fiber *** results demonstrate that the transient breathing dynamics have a substantial impact on the extinction stage of both steady-state and breathing-state dissipative *** duration of transient breathing exhibits a high degree of sensitivity to variations in pump *** simulations are utilized to produce analogous breathing dynamics within the framework of a model that integrates equations characterizing the population inversion in a mode-locked *** results corroborate the role of Q-switching instability in the onset of breathing ***,these findings offer new possibilities for the advancement of various operational frameworks for ultrafast lasers.

关键词： Breathing soliton Fiber laser Dispersive Fourier transform Q-switched instability

Solitons in the fractional Schr?dinger equation with parity-time-symmetric lattice potential

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2018年第9期6卷 875-879页

作者： xiankun yao XUEMING LIu State Key Laboratory of Modern Optical Instrumentation Department of Optical EngineeringZhejiang UniversityHangzhou 310027China

We investigate the properties of spatial solitons in the fractional Schr?dinger equation(FSE) with parity-time(PT)-symmetric lattice potential supported by the focusing of Kerr nonlinearity. Both one-and two-dimensional solitons can stably propagate in PT-symmetric lattices under noise perturbations. The domains of stability for both one-and two-dimensional solitons strongly depend on the gain/loss strength of the lattice. In the spatial domain, the solitons are rigidly modulated by the lattice potential for the weak diffraction in FSE systems. In the inverse space, due to the periodicity of lattices, the spectra of solitons experience sharp peaks when the values of wavenumbers are even. The transverse power flows induced by the imaginary part of the lattice are also investigated, which can preserve the internal energy balances within the solitons.

关键词：奇偶时间等离子体通讯技术发展现状

Cauliflower-like Ni_(3)S_(2)foam for ultrastable oxygen evolution electrocatalysis in alkaline seawater

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第8期17卷 6820-6825页

作者： Qiuying Dai Xun He Yongchao yao Kai Dong Xuwei Liu xiankun Guo Jie Chen Xiaoya Fan Dongdong Zheng Yongsong Luo Shengjun Sun Luming Li Wei Chu Asmaa Farouk Mohamed SHamdy Xuping Sun Bo Tang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute for Advanced Study Chengdu UniversityChengdu 610106China Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Center for High Altitude Medicine West China HospitalSichuan UniversityChengdu 610041China Laoshan Laboratory Qingdao 266237China

It is of great importance to design and develop electrocatalysts that are both long-lasting and efficient for seawater ***,a three-dimensional porous cauliflower-like Ni_(3)S_(2)foam on Ni foam(Ni_(3)S_(2)foam/NF)is proposed as a high-performance electrocatalyst for the oxygen evolution reaction in alkaline *** as-synthesis Ni_(3)S_(2)foam/NF achieves exceptional efficacy,achieving a current density of 100 mA·cm^(−2)at mere overpotential of 369 ***,its electrocatalytic stability extends up to 1000 h at 500 mA·cm^(−2).

关键词： Ni_(3)S_(2)foam oxygen evolution reaction seawater electrolysis electrocatalyst

Modulation Instability and Non-Degenerate Akhmediev Breathers of Manakov Equations

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 Physics Letters 2022年第9期39卷 28-32页

作者：刘冲陈少春姚献坤 Nail Akhmediev School of Physics Northwest UniversityXi’an 710127China Optical Sciences Group Department of Fundamental and Theoretical PhysicsResearch School of PhysicsThe Australian National UniversityCanberra ACT 2600Australia Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an 710127China NSFC-SPTP Peng Huanwu Center for Fundamental Theory Xi’an 710127China

We reveal a special subset of non-degenerate Akhmediev breather(AB)solutions of Manakov equations that only exist in the focusing *** on exact solutions,we present the existence diagram of such excitations on the frequency-wavenumber *** single-frequency modulation instability leads to simultaneous excitation of three ABs with two of them being non-degenerate.

关键词： excitation degenerate subset

在线全文

学校读者我要写书评

暂无评论

无人机自适应变极化抗干扰天线研究

现代雷达 2024年第6期46卷 61-66页

作者：孟琦章保姚卫雷殷浩周永军葛贤坤南京华雷电子工程研究所有限公司江苏南京211100 南京工业大学电气工程与控制科学学院江苏南京211816

现代信息化战场上,无人机以其独特的优势,得到了广泛的应用,然而日趋复杂的电磁环境对无人机通信造成了严重的影响。文中针对无人机通信数据链的抗干扰需求,利用微波铁氧体双折射效应和自适应快速变极化控制,设计了一种无人机自适应变... 详细信息

现代信息化战场上,无人机以其独特的优势,得到了广泛的应用,然而日趋复杂的电磁环境对无人机通信造成了严重的影响。文中针对无人机通信数据链的抗干扰需求,利用微波铁氧体双折射效应和自适应快速变极化控制,设计了一种无人机自适应变极化抗干扰天线。无人机自适应变极化抗干扰天线是利用微波铁氧体双折射效应快速产生垂直极化波、水平极化波、左圆极化波、右圆极化波、椭圆极化波等任意极化波辐射空间与干扰波形成极化正交压制干扰,当无人机受到自然或人为有源同频干扰时,天线能够快速改变极化状态抑制干扰,保持无人机通信畅通。重点从工程应用角度分析了无人机自适应变极化抗干扰天线的原理和技术要点,并针对天线在2.4 GHz~2.5 GHz工作频段的抗干扰效果进行了抗干扰试验。

关键词：无人机抗干扰变极化自适应铁氧体

鄂尔多斯盆地西北缘奥陶系克里摩里组等深流沉积

在线全文

学校读者我要写书评

暂无评论

古地理学报 2024年第4期26卷 962-971页

作者：李华何幼斌姚凤南何一鸣姜纯伟张显坤吴吉泽徐艳霞梁建设长江大学地球科学学院湖北武汉430100 中海油石油国际有限公司北京100028

等深流沉积是深水沉积中的常见类型之一。古代地层记录中等深流沉积的鉴别及形成机理研究相对薄弱。在鄂尔多斯盆地西缘奥陶系克里摩里组发现了一种新的等深流沉积类型,即透镜状等深流沉积。研究表明:(1)研究区发育4种岩相及组合。岩相... 详细信息

等深流沉积是深水沉积中的常见类型之一。古代地层记录中等深流沉积的鉴别及形成机理研究相对薄弱。在鄂尔多斯盆地西缘奥陶系克里摩里组发现了一种新的等深流沉积类型,即透镜状等深流沉积。研究表明:(1)研究区发育4种岩相及组合。岩相1为透镜状泥晶灰岩,岩相2以透镜状粉晶灰岩为主,岩相3为透镜状泥晶及亮晶方解石胶结砾屑-砂屑灰岩,岩相4以层状砾屑灰岩最为常见。(2)透镜状泥晶、粉晶及砾屑-砂屑灰岩相单层厚度相对较小,波状界面,呈透镜状,局部见泥质纹层、条带及斑点,粉晶方解石多呈斑块状,整体呈细—粗—细沉积序列,为等深流持续作用而成;层状砾屑灰岩相中砾屑见叠瓦状构造,局部见倒“小”字排列,可能与风暴相关。(3)碳氧同位素反映相对海平面及古温度具有2个升高—降低旋回及1个持续上升半旋回。(4)研究区等深流为相对低能的温盐环流。等深流活动强度与海平面升降、盐度变化呈正相关。(5)从下至上,等深流活动逐渐加强,局部存在短暂极强现象,并可能受风暴影响。

关键词：等深流等深流沉积克里摩里组奥陶系鄂尔多斯盆地

同方期刊数据库

Inhibition of furin by bone targeting superparamagnetic iron oxide nanoparticles alleviated breast cancer bone metastasis

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2021年第3期6卷 712-720页

作者： Yichuan Pang Li Su yao Fu Fan Jia Chenxi Zhang xiankun Cao Wenxin He Xueqian Kong Jiake Xu Jie Zhao An Qin Shanghai Key Laboratory of Orthopedic Implants Department of OrthopaedicsShanghai Ninth People's HospitalShanghai Jiaotong University School of MedicineShanghai200011China Department of Nuclear Medicine Shanghai Tenth People's HospitalTongji University School of MedicineShanghai200072China Hongqiao International Institute of Medicine Shanghai Jiaotong University School of Medicine201103China Center for Chemistry of High-Performance&Novel Materials Department of ChemistryZhejiang UniversityHangzhou310027China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China School of Biomedical Sciences The University of Western AustraliaPerthWestern Australia6009Australia

Breast cancer bone metastasis poses significant challenge for therapeutic *** the metastatic environment,osteoclasts and tumor cells interact synergistically to promote cancer *** this study,the proprotein convertase furin is targeted due to its critical roles in both tumor cell invasion and osteoclast ***,the furin inhibitor is specifically delivered by bone targeting superparamagnetic iron oxide(SPIO)*** in vitro and in vivo data demonstrate that this system can effectively inhibit both osteoclastic bone resorption and breast cancer invastion,leading to alleviated ***,the bone targeting&furin inhibition nanoparticle system is a promising therapeutic and diagnostic strategy for breast cancer bone metastasis.

关键词： Breast cancer metastasis Osteoclast Furin Bone targeting Iron oxide nanoparticles

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

盘式制动器摩擦片的温度场研究

武汉理工大学学报 2001年第7期23卷 22-24页

作者：王营曹献坤姚安佑李林子武汉理工大学

从制动过程的能量转换及摩擦生热机理出发 ,建立了制动器的热流密度分配模型 ,并结合有限元法对盘式制动器摩擦片的温度场进行分析 ,揭示出摩擦制动时摩擦片内温度分布规律 ,从而为摩擦制动器的设计提供可靠的依据。

关键词：摩擦片温度场有限元汽车盘式制动器

在线全文

学校读者我要写书评

暂无评论

片状增强制动摩擦材料的研究

兵工学报 2000年第3期21卷 249-252页

作者：曹献坤姚安佑闻荻江武汉工业大学机电学院湖北武汉430070 苏州大学材料学院

作者针对汽车制动材料近年来的发展趋势及要求 ,在摩擦学理论及复合材料理论的指导下 ,选用片状蛭石与 kevlar纤维混杂作为增强体 ,改性树脂为基体 ,在配方及工艺研究的基础上 ,研制出片状增强摩擦材料。研究表明 :此摩擦材料力学性能... 详细信息

作者针对汽车制动材料近年来的发展趋势及要求 ,在摩擦学理论及复合材料理论的指导下 ,选用片状蛭石与 kevlar纤维混杂作为增强体 ,改性树脂为基体 ,在配方及工艺研究的基础上 ,研制出片状增强摩擦材料。研究表明 :此摩擦材料力学性能高 ,摩擦性能稳定 ,特别是高温磨损小 ,噪声低 ,是一种取代石棉摩擦材料的新型制动材料。

关键词：片状增强摩擦材料摩擦磨损