检索结果-南通市图书馆

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

异步测量系统的分布式序贯椭球相交融合估计

电光与控制 2024年第2期31卷 29-34页

作者：周书玉张鹏李孟委中北大学仪器与电子学院太原030000 中北大学仪器科学与动态测试教育部重点实验室太原030000

针对具有测量缺失现象的多源异步测量系统的状态估计,提出一种基于条件Kalman滤波的分布式序贯椭球相交(DSEI)融合算法。对系统测量缺失现象通过一组服从伯努利分布的随机变量进行建模描述;同步化状态空间模块利用状态迭代方法将异步测... 详细信息

针对具有测量缺失现象的多源异步测量系统的状态估计,提出一种基于条件Kalman滤波的分布式序贯椭球相交(DSEI)融合算法。对系统测量缺失现象通过一组服从伯努利分布的随机变量进行建模描述;同步化状态空间模块利用状态迭代方法将异步测量系统在测量更新时刻进行同步;局部滤波模块采用条件Kalman滤波算法实现,保证滤波结果的完整性;融合估计模块在不考虑多传感器间相关性信息的前提下,设计DSEI融合算法对各个传感器提供的滤波结果进行融合。仿真实例验证了所提算法具有精度提高35%、迭代时间小于3 ms的优越性能。

关键词：多传感器系统异步采样椭球相交相关性未知

Sonic horizon dynamics of ultracold Fermi system under elongated harmonic potential

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第10期27卷 227-230页

作者： Ying Wang shuyu zhou School of Science Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine Mechanicsthe Chinese Academy of SciencesShanghai 201800China

We study the phenomena of the sonic horizon in an ultracold atomic Fermi system in an elongated harmonic *** on the one-dimensional Gross–Pitaevskii equation model and variational method combined with exact derivation approach, we derive an analytical formula which describes the occurrence of the sonic horizon and the associated Hawking radiation temperature. Using a pictorial demonstration of the key physical quantities we identify the features reported in prior numerical studies of a three-dimensional（3 D） ultracold atomic system, proving the applicability of the theoretical model presented here.

关键词： sonic horizon ultracold Fermi system Gross-Pitaevskii equation

Fast Li^(+) migration in LiPON electrolytes doped by multi-valent Fe ions

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第12期75卷 349-359,I0009页

作者： shuyu zhou Ruixue Tian Aimin Wu Li Lin Hao Huang Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024LiaoningChina Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055GuangdongChina School of Materials Science and Engineering Dalian University of TechnologyDalian 116024LiaoningChina

Achieving superior ionic conductivity of Li PON solid electrolyte films is critical for the solid-state thinfilm batteries with high energy *** we describe a method of preparing Li PON with promising ionic migration capability and high work function by systematically tailoring the concentration of Fe ions ***-doped LiPON exhibits excellent ionic conductivity(1.08×10^(-5)S cm^(-1),nearly 10 times higher than the pristine LiPON),low ionic activation energy,and moderate equilibrium potential difference(versus LiCoO_(2),0.78 V)at room *** favorable ionic mobility and electrochemical stability of Fedoped Li PON are fully ***-solid-state“Li/LiPON/LiCoO_(2)”TFB has been successfully constructed with a large specific capacity(~36.3μAh cm^(-2)μm^(-1)at 10μA cm^(-2))and good cycle performance(87.8%capacity retention after 40 cycles).Fe with the unique d-orbital electronic structure changes the local electron density of Li PON system with the weakened electrostatic constraint of PO_(3)N^(4-)tetrahedrons to Li^(+).A low Li^(+)migration barrier center is established around the Fe–N bridge bonds.

关键词： Solid electrolyte Fe-doped LiPON Ionic conductivity Work function Magnetron sputtering

Assembly and packing models of [Ti_(6)Co_(12)] ring based on the titanium-capped cobalt clathrochelates

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第2期32卷 923-925页

作者： Hao Fu shuyu zhou Xi Fan Lei Zhang Jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter.Chinese Academy of SciencesFuzhou 350002China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China

In this work,titanium-capped cobalt clathrochelates have been applied as secondary building units(SBUs) fo r the construction of supramolecular *** heterometallic wheel-like [Ti_(6) Co_(12)] complexes based on cobalt clathrochelates,[C_(6)H_(15)N_(4)]_(2)[TiCo_(2)(μ_(2)-Oipr)(Oipr)_(2)(Dmg)_(3)]_(6)(2,Dmg=dimethy[glyoxime) and H_(6)[TiCo_(2)(μ_(2)-Oipr)(Oipr)_(2)(Dmg)_(3)]_(6)(3),have been successfully synthesized and *** supramolecular stacking modes of these wheels are largely dependent on the applied synthetic conditions,which further impact their gas adsorption properties.

关键词： Titanium-oxo clusters Wheel-like molecule Coordination self-assembly Heterometallic complexes Clathrochelates

在线全文

学校读者我要写书评

暂无评论

血脂异常与胃肠道息肉发生的关系研究进展

中国医药科学 2024年第16期14卷 41-44页

作者：王一朗杨文颖周姝妤长春中医药大学吉林长春130117 吉林省人民医院吉林长春130117

胃肠道息肉是指黏膜上皮或腺体过度增生形成的良性肿瘤,既可单发亦可多发,是胃肠道的癌前病变,也是消化内科的常见病。血脂异常是指人体血液中胆固醇(TC)、甘油三酯(TG)和低密度脂蛋白(LDL)等脂类物质出现的异常状态,是一种与肥胖高度... 详细信息

胃肠道息肉是指黏膜上皮或腺体过度增生形成的良性肿瘤,既可单发亦可多发,是胃肠道的癌前病变,也是消化内科的常见病。血脂异常是指人体血液中胆固醇(TC)、甘油三酯(TG)和低密度脂蛋白(LDL)等脂类物质出现的异常状态,是一种与肥胖高度相关的代谢紊乱。近年来,关于胃肠道息肉受代谢性因素影响的研究较多,根据文献报道,大部分胃肠道息肉患者都存在血脂异常的现象,由此可以推测合理使用降脂药物对于胃肠道息肉患者有一定的预防作用。然而在各种研究中,究竟哪种脂类成分与息肉的发病有关,目前尚无定论。本文拟从血脂异常与胃肠道息肉发病的关系入手,重点探讨血脂异常和胃肠道息肉之间潜在发病机制、与胃肠道息肉的相关性以及降脂药物在胃肠道息肉中的应用等方面的研究进展进行综述。为临床上更早筛选出胃肠道息肉并及时阻断其发展提供参考。

关键词：胃肠道息肉血脂异常降脂药物相关性

TiO_(2)-ZnO复合光催化剂制备与改性研究进展

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

环境化学 2024年第8期43卷 2616-2630页

作者：马沼雁季琳王俊斐任媛媛周书宇梁丽华西北大学城市与环境学院西安710127 陕西省地表系统与环境承载力重点实验室西安710127

光催化作为一种绿色、高效的处理技术,在降解水中有机污染物方面有着巨大的优势.二氧化钛(TiO_(2))是一种典型的光催化材料,与氧化锌(ZnO)复合后可以克服单一TiO_(2)材料电子-空穴复合率高、可见光利用率低等缺点.本文介绍了TiO_(2)-Zn... 详细信息

光催化作为一种绿色、高效的处理技术,在降解水中有机污染物方面有着巨大的优势.二氧化钛(TiO_(2))是一种典型的光催化材料,与氧化锌(ZnO)复合后可以克服单一TiO_(2)材料电子-空穴复合率高、可见光利用率低等缺点.本文介绍了TiO_(2)-ZnO光催化降解水中有机污染物的机理,重点系统综述了TiO_(2)-ZnO复合材料的制备方法和进一步改性的研究,最后对未来TiO_(2)-ZnO光催化技术的发展方向做出了展望.

关键词：二氧化钛氧化锌光催化制备改性.

维普期刊数据库博看期刊

An efficient physics-guided Bayesian framework for predicting ground settlement profile during excavations in clay

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1411-1424页

作者： Cong Tang shuyu He Wanhuan zhou State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering University of MacaoChina

Recently,the application of Bayesian updating to predict excavation-induced deformation has proven successful and improved prediction accuracy ***,updating the ground settlement profile,which is crucial for determining potential damage to nearby infrastructures,has received limited *** address this,this paper proposes a physics-guided simplified model combined with a Bayesian updating framework to accurately predict the ground settlement *** advantage of this model is that it eliminates the need for complex finite element modeling and makes the updating framework ***,the model is physically interpretable,which can provide valuable references for construction *** effectiveness of the proposed method is demonstrated through two field case studies,showing that it can yield satisfactory predictions for the settlement profile.

关键词： Bayesian updating Excavations Ground settlement profile Simplified model Uncertainty

Hierarchical under frequency load shedding scheme for inter-connected power systems

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

Protection and Control of Modern Power Systems 2023年第2期8卷 292-303页

作者： Guowei Cai shuyu zhou Cheng Liu Yuchi Zhang Shujia Guo Zhichong Cao School of Electrical Engineering Northeast Electrical Power UniversityJilin 132012China

Severe disturbances in a power network can cause the system frequency to exceed the safe operating *** the last defensive line for system emergency control,under frequency load shedding(UFLS)is an important method for preventing a wide range of frequency *** paper proposes a hierarchical UFLS scheme of“centralized real-time decision-making and decentralized real-time control”for inter-connected *** centralized decision-layer of the scheme takes into account the importance of the load based on the equivalent transformation of kinetic energy(KE)and potential energy(PE)in the transient energy function(TEF),while the load PE is used to determine the load shedding amount(LSA)allocation in different loads after faults in *** the same time,the influence of inertia loss is considered in the calculation of unbalanced power,and the decentralized control center is used to implement the one-stage UFLS process to compensate for the unbalanced *** are carried out on the modified New England 10-generator 39-bus system and 197-bus system in China to verify the performance of the proposed *** results show that,compared with other LSA allocation indicators,the proposed alloca-tion indicators can achieve better fnadir and *** the same time,compared with other multi-stage UFLS schemes,the proposed scheme can obtain the maximum fnadir with a smaller LSA in scenarios with high renewable energy sources(RES)penetration.

关键词： Hierarchical under frequency load shedding Centralized real-time decision-making and decentralized real-time control Transient energy function Kinetic energy Potential energy

S-O bond chemically constrained NiS2/rGO nanocomposite with enhanced Na-ion storage capacity

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 Chemical Letters 2020年第9期31卷 2353-2357页

作者： shuyu zhou Xiaozhe Jin Shengming Zhu Qian Luo Zhiwen Qiu Aimin Wu Hao Huang Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China

NiS2 has become a research hotspot of anode materials for Na-ion batteries due to its high theoretical specific ***,the volume effect,the dissolution of polysulfide intermediates and the low conductivity during the charge/discharge process lead to the low specific capacity and poor cycling ***2/rGO nanocomposite was prepared by a facile two-step process:GO was prepared by modified Hummers method,and then NiS2/rGO nanocomposite was synthesized by L-cys assisted hydrothermal ***2/rGO nanocomposite shows excellent cycle performance and rate performance,which could be attributed to the mesoporous structure on the graphene skeleton with high ***,the chemical constraint of a unique S—O bond on NiS2 could inhibit the dissolution of intermediates and the loss of irreversible capacity.

关键词： Na-ion batteries NiS2/rGO nanocomposite Hydrothermal reaction Anode Chemical constraint