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Engineering the grain boundary:a promising strategy to configure NiCoP_(4)O_(12)/NiCoP nanowire arrays for ultra-stable supercapacitor

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Frontiers of Chemical Science and Engineering 2022年第8期16卷 1259-1267页

作者： Mengqi cui Zining Wang Yuanye Jiang hui Wang State Key Laboratory Base for Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Guangdong Provincial Key Laboratory for Electronic Functional Materials and Devices Huizhou UniversityHuizhou 516001China

NiCoP_(4)O_(12)/NiCoP nanorod-like arrays with tunable grain boundary density and pores were synthesized by the processes composed of hydrothermal and pyrolysis,in which,the electron structure of Ni and Co atoms characterized by X-ray photoelectron spectroscopy was contemporaneous inverse *** optimized NiCoP_(4)O_(12)/NiCoP arrays have a high specific capacitance of 507.8μAh∙cm^(–2)at 1 mA∙cm^(–2),and good rate ability of 64.7%retention at 30-folds increased current ***,an ultra-stable ability,88.5%of retention after 10000 cycles,was achieved in an asymmetric cell assembled of the NiCoP_(4)O_(12)/NiCoP arrays with activated *** addition,the energy and power densities of an asymmetric cell were higher than those of other work,demonstrating as-prepared NiCoP_(4)O_(12)/NiCoP arrays are promising electrodes for supercapacitors.

关键词： NiCo array electrode grain boundary stability supercapacitor

Synthesis and Resolution of 10,11-Dihydro-10-hydroxycyproheptadine

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Chinese Chemical Letters 2006年第4期17卷 444-446页

作者： Jian Mei cui Da Li yin Institute of Materia Medica Peking Union Medical College ＆ Chinese Academy of Medical Sciences Beijing 100050

10, 11-Dihydro-10-hydroxycyproheptadine was synthesized in a new and facile synthetic route and resolved by L-（-）-2-（1, 3）-dioxo-1, 3-dihydroisoindol-2-yl）-propionic acid and D-（＋）-tartaric acid, respectively.... 详细信息

关键词： H1 receptor antagonist, chiral center, racemate resolution, specific rotation.

Quench sensitivity of Al-Cu-Mg alloy thick plate

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Rare Metals 2023年第9期42卷 3161-3169页

作者： Yuan yin Bing-hui Luo Zhen-Hai Bai hui-Bo Jing School of Materials Science and Engineering Central South UniversityChangsha410083China

The quench sensitivity of Al-Cu-Mg alloy was investigated at different thicknesses of the thick *** quenching process was simulated via finite element analysis(FEA);time-temperature-property(TTP)curves and time-temperature-transformation(TTT)curves were obtained through hardness test and differential scanning calorimetry(DSC)test;and the microstructural observation was carried out by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).Experimental results exhibit that the quench cooling rate decreases dramatically from the surface to the center of the plate,and the inhomogeneous quenching causes the difference in *** the decrease in quench cooling rate,constituent particles are coarsening gradually;the quantity of T-phase(Al_(20)Cu_(2)Mn_(3))increases and the S-phase(Al_(2)Cu Mg)*** to the precipitation kinetics analysis,the decrease in S-phase is caused by the increase in precipitate activation *** that the center of the plate shows the highest quenching sensitivity,which is consistent with the analysis of time-temperature-property curves and time-temperature-transformation curves.

关键词： Al-Cu-Mg alloy Quench sensitivity Precipitation kinetics Time-temperature-property curves Microstructure

A SET OF SYMMETRIC QUADRATURE RULES ON TRIANGLES AND TETRAHEDRA

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Journal of Computational Mathematics 2009年第1期27卷 89-96页

作者： Linbo Zhang Tao cui hui Liu LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

We present a program for computing symmetric quadrature rules on triangles and tetrahedra. A set of rules are obtained by using this program. Quadrature rules up to order 21 on triangles and up to order 14 on tetrahedra have been obtained which are useful for use in finite element computations. All rules presented here have positive weights with points lying within the integration domain.

关键词： Finite element Numerical integration Quadrature Cubature Triangle Tetrahedron.

Photoelectron momentum distributions of single-photon ionization under a pair of elliptically polarized attosecond laser pulses

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Chinese Physics B 2020年第7期29卷 313-320页

作者： hui-Fang cui Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal UniversityLinfen 041004China Key Laboratory of Spectral Measurement and Analysis of Shanxi Province Shanxi Normal UniversityLinfen 041004China

The attosecond ionization dynamics of atoms has attracted extensive attention in these ***,the role of the initial state is not clearly *** address this question,we perform simulations on the neon atom and its model atom with different initial states by numerically solving the corresponding two-dimensional time-dependent Schrodinger¨*** theoretically investigate atomic photoelectron momentum distributions(PMDs)by a pair of elliptically polarized attosecond laser *** find that the PMD is sensitive not only to the ellipticities of the pulses,the relative helicity,and time delay of the pulses,but also to the symmetry of the initial electronic *** are analyzed by the first-order time-dependent perturbation theory(TDPT)and offer a new tool for detecting the rotation direction of the ring currents.

关键词： photoelectron momentum distributions elliptically polarized attosecond laser pulses magnetic quantum numbers rotation direction of the ring currents

Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice

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Chinese Physics B 2020年第1期29卷 235-240页

作者： Han-Xiao Zhang Chu-hui Fan cui-Li cui Jin-hui Wu Center for Quantum Sciences Northeast Normal UniversityChangchun 130117China College of Physics Jilin UniversityChangchun 130012China

We study the multistability of fixed points for a dimerized system of Rydberg atoms driven by two laser fields and trapped in a two-dimensional(2D)square *** identical driving fields,the fixed points of this system exhibit stable uniform,unstable uniform,stable nonuniform,or oscillating nonuniform phases in the presence of a bistable *** different driving fields,however,all(stable,unstable,or oscillating)phases become nonuniform instead,which then results in two islets isolated from the mainland of Rydberg *** also show that a tristable region may stretch out from the(nonuniform)bistable region near the islets,indicating that a richer phase diagram can be attained by tuning the Rabi frequencies and/or detunings of the driving *** but not least,the fixed points can adiabatically evolve from the islets to the mainland but can not inversely evolve from the mainland to the islets.

关键词： Rydberg atoms dimerized system fixed point nonuniform phase

Fast algorithms of public key cryptosystem based on Chebyshev polynomials over finite field

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The Journal of China Universities of Posts and Telecommunications 2011年第2期18卷 86-93页

作者： LI Zhi-hui cui Yi-dong XU hui-min Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications Beij ing 100876 China School of Information and Communication engineering Beijing University of Posts and Telecommunications Beijing 100876 China

The computation of Chebyshev polynomial over finite field is a dominating operation for a public key *** generic algorithms with running time of have been presented for this computation：the matrix algorithm and the characteristic polynomial algorithm,which are feasible but not *** this paper,these two algorithms are modified in procedure to get faster execution *** complexity of modified algorithms is still,but the number of required operations is reduced,so the execution speed is ***,a new algorithm relevant with eigenvalues of matrix in representation of Chebyshev polynomials is also presented,which can further reduce the running time of that computation if certain conditions are *** implementations of these algorithms are realized,and the running time comparison is *** an efficient scheme for the computation of Chebyshev polynomial over finite field is presented.

关键词： Chebyshev polynomial algorithm running time square root

Design and mechanism of agglomeration of aspirin crystals in pure solvents

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Particuology 2023年第11期82卷 146-156页

作者： Lihong Jia Degui Wu Pingping cui Ling Zhou Qiuxiang yin School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China Tianjin Key Laboratory of Modern Drug Delivery and High Efficiency Tianjin300072China

Agglomeration with improved flowability for platy crystals is desirable in pharmaceutical downstream processing. The formation of agglomerates in pure solvents without the aid of bridging liquids is a convenient and low-cost method compared with complex spherical crystallization. In this work, the adhesion free energies between aspirin crystals in six solvents were calculated using Lifshitz-van der Waals acid-base theory to screen suitable solvents for agglomeration. The maximum stirring rate for agglomeration was determined by adhesion forces and dispersion forces. Then the agglomerates of plate-shaped aspirin were successfully prepared in acetone, methanol, ethanol, 2-propanol, and ethylene glycol without additives by simple cooling crystallization. The interactions between solvent and crystal surfaces were also used to explain the outcomes. A feasible mechanism for the agglomeration process of platy crystals was elucidated, involving the adhesion of dominant crystal facets at the beginning. The effect of stirring rate, cooling rate, and initial supersaturation on agglomeration degree and particle size of aspirin agglomerates were studied. The obtained aspirin agglomerates under the optimal conditions exhibited a uniform particle size distribution, a high agglomeration degree, and superior flowability.

关键词： Agglomeration Platy crystal Aspirin Adhesion force

Specification and Verification of the Zab Protocol with TLA+

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Journal of Computer Science & Technology 2020年第6期35卷 1312-1323页

作者： Jia-Qi yin hui-Biao Zhu Yuan Fei Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062China College of Information Mechanical and Electrical EngineeringShanghai Normal UniversityShanghai 200234China

ZooKeeper Atomic Broadcast (Zab) is an atomic broadcast protocol specially designed for ZooKeeper, which supports additional crash recovery. This protocol actually has been widely adopted by famous Internet companies, but there are few studies on the correctness and credibility of the Zab protocol, and thus we utilize formal methods to study the correctness. In this paper, Zab, Paxos and Raft are all analyzed and compared to help better understand the Zab protocol. Then we model the Zab protocol with TLA+ and verify three properties abstracted from the specification by the model checker TLC, including two liveness properties and one safety property. The final experimental results can prove that the design of the protocol conforms to the original requirements. This paper makes up for the analysis of formal methods in the Zab protocol.

关键词： Zab protocol TLA+ specification verification