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Chinese Journal of Polymer Science 2017年第12期35卷 1572-1586页

作者： Houluo Cong sen Xu 郑思珣 Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University

A series of mixed, random cylindrical brush copolymers bearing polystyrene（PS） and poly（ε-caprolactone）（PCL） side chains were synthesized via the combination of ring-opening polymerization（ROP） and atom transfer radical polymerization（ATRP）. These novel cylindrical brush copolymers have been characterized by means of nuclear magnetic resonance（NMR） spectroscopy, gel permeation chromatography（GPC） and differential scanning calorimetry（DSC）. It was found that the mikto-armed cylindrical brush copolymers were microphase-separated in bulks and that the morphologies were dependent on the mass ratios of PS to PCL side chains. One of the cylindrical brush copolymers was employed to incorporate into epoxy thermoset to investigate effect of the mikto-armed cylindrical brush architecture on the reaction-induced microphase separation behavior. Depending on the concentration of the cylindrical brush in epoxy, the thermosets can display the morphologies with the spherical, worm-like and lamellar PS microdomains dispersing in continuous thermosetting matrices.

关键词： Cylindrical brush copolymers Block copolyrner Epoxy Reaction-induced microphase separation

CAVITATION BEHAVIOR OF A NACA16-012 HYDROFOIL

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Journal of Hydrodynamics 1993年第2期5卷 87-93页

作者： Huang, Jian-bo Pen, sen-sen Pong, Xiao-xin Chen, Bin East China Inst of Metallurgy Maanshan China

Numerical and experimental study is carried to investigate the cavitation behavior in the turbulent flow around a NACA16-012 hydrofoil. The Navier-Stokes Equations for compressible fluid are adopted to simulate the overall motion and dynamical characteristics of the cavity flow, while the bubble dynamics is used to calculate the motion and growth of nuclei inside the cavity. Cavitation experiment for the hydrofoil is carried out in a water tunnel of CSS-RC, the phenomenon in the experiment is recorded and analyzed with high speed photographic technique.

关键词： Bubble formation Cavitation Compressible flow Mathematical models Turbulent flow Water supply tunnels

Effect of Heat Treatment on Structure and Magnetic Performance of Ni-Fe-P Alloy Obtained by Electroless Plating

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Chemical Research in Chinese Universities 2005年第6期21卷 718-722页

作者： WANG sen-lin ZHANG Yong College of Materials Science and Engineering ChinaCollege of Information Science and Engineering Huaqiao University Quanzhou 362021 P. R.China

The electroless deposition of Ni68-Fe10.5-P21.5 alloy has been investigated. The crystallization behavior of the deposit was comparatively studied by using differential scanning calorimetry and X-ray diffractometry. The deposit transforms into a square Ni3P phase at 380. 0 ℃, then changes into a cubic FeNi3 phase at 490. 0 ℃. The microhardness, the size of the formed grains and the magnetic performance of the deposit increase with the increase of the heat treatment temperature below 500 ℃, then they decrease after this temperature. The effect of heat treatment time at 500 ℃ on the surface micromorphology, the structure and the magnetic performance of the deposit were also studied. The resuits show that with the increase of heat treatment time, the extent of crystallization of the deposit increases and the size of the formed grains becomes uniform. The results also show that the magnetic performance of the deposit under heat treatment for 40 min is maximal and then decreases with the increase of heat treatment time. The property change of the deposit is related to the crystal structure and the size of the formed grains of the deposit.

关键词： Electroless plating Ni-Fe-P alloy Heat treatment Magnetic performance

Optimal Noise Suppression of Phase Damping Quantum Systems via Weak Measurement

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Journal of Systems Science & Complexity 2019年第5期32卷 1264-1279页

作者： HARRAZ Sajede CONG Shuang KUANG sen Department of Automation University of Science and Technology of China

One qubit subjected to the effect of phase damping in a two-level quantum system with arbitrary pure initial state is studied in this paper. The aim of this paper is to find the optimal control scheme to correct the qubit back as close as possible to its initial state. The strength-dependent measurements and control correction rotation in different bases are designed to protect the arbitrary pure state of qubit. The authors design the optimal weak measurement strength to achieve the best trade-off between gaining the information of the system and the disturbance through *** authors study the suppression of phase damping in two cases: There is and isn’t the y component in initial state. The authors deduce the optimal parameters and performances of the control schemes for the various initial state situations. Simulation results demonstrate the effectiveness of the proposed control schemes.

关键词： Open quantum system optimal noise suppression phase damping quantum system control weak measurement

Critical damage value of AZ31B magnesium alloy with different temperatures and strain rates

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Rare Metals 2021年第1期40卷 137-142页

作者： Jing-Ren Dong Ding-Fei Zhang Yu-Feng Dong Fu-Sheng Pan sen-sen Chai College of Materials Science and Engineering Chongqing UniversityChongqing 400045China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400045China

The uniaxial tensile tests were carried out at temperature ranging from room temperature(RT)to 523 K under strain rates of 0.001,0.010 and 0.100 s^(-1) to obtain the flow stress of AZ31 B magnesium *** tensile tests were simulated by the finite element method(FEM)to calculate the critical damage values(Dc)of the CockcroftLatham criterion to predict the occurrence of fracture ***,the effects of temperature and strain rate on Dc were analyzed to predict the critical damage value’s *** results demonstrate that the critical damage value changes in the range of *** increases as strain rate decreases at constant temperature,and increases with the increase of temperature under certain strain rate,but is more sensitive to the temperature.

关键词： AZ31 magnesium alloy Cockcroft-Latham Critical damage value Strain rates

Event-triggered robust guaranteed cost control for two-dimensional nonlinear discrete-time systems

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Journal of Systems Engineering and Electronics 2019年第6期30卷 1243-1251页

作者： WANG sen BU Xuhui LIANG Jiaqi School of Electrical Engineering and Automation Henan Polytechnic University

An event-triggered scheme is proposed to solve the problems of robust guaranteed cost control for a class of two-dimensional(2-D)discrete-time ***,an eventtriggered scheme is proposed for 2-D discrete-time systems with parameter uncertainties and sector ***,according to the Lyapunov functional method,the sufficient conditions for the existence of event-triggered robust guaranteed cost controller for 2-D discrete-time systems with parameter uncertainties and sector nonlinearities are ***,based on the sufficient conditions and the linear matrix inequality(LMI)technique,the problem of designing event-triggered robust guaranteed cost controller is transformed into a feasible solution problem of ***,a numerical example is given to demonstrate that,under the proposed event-triggered robust guaranteed cost control,the closed-loop system is asymptotically stable and fewer communication resources are occupied.

关键词： event-triggered robust guaranteed cost control two dimensional(2-D)nonlinear system networked control system.

Bell State Preparation Based on Switching Between Quantum System Models

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Journal of Systems Science & Complexity 2017年第2期30卷 347-356页

作者： ZHOU Juan KUANG sen CONG Shuang Department of Automation University of Science and Technology of ChinaHefei 230027China CAS Key Laboratory of Technology in Geo-spatial Information Processing and Application System University of Science

For the preparation of any target Bell state under continuous quantum measurement, this paper proposes a method which achieves the control objective by switching between two different models or by switching between two control channels under one model. Proper control Hamiltonians are selected for the two system models, a switching strategy between the two models is designed, and the stability of the whole switching system is proved in theory. For a given target Bell state, the effectiveness of the proposed switching control strategy between different models is illustrated through simulation experiments.

关键词： Bell state model switching quantum systems switching strategy.

A robust extraction algorithm for biomedical signals from noisy mixtures

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Frontiers of Computer Science 2011年第4期5卷 387-394页

作者： Yongjian ZHAO Boqiang LIU sen WANG School of Control Science and Engineering Shandong University Jinan 250061 China School of Information Engineering Shandong University at Weihai Weihai 264209 China Kodak Research Laboratories Eastman Kodak Company Rochester NY 14620 USA

Blind source extraction （BSE） is widely used to solve signal mixture problems where there are only a few desired signals. To improve signal extraction performance and expand its application, we develop an adaptive BSE algorithm with an additive noise model. We first present an improved normalized kurtosis as an objective function, which caters for the effect of noise. By combining the objective function and Lagrange multiplier method, we further propose a robust algorithm that can extract the desired signal as the first output signal. Simulations on both synthetic and real biomedical signals demonstrate that such combination improves the extrac- tion performance and has better robustness to the estimation error of normalized kurtosis value in the presence of noise.

关键词： blind source extraction (BSE) normalizedkurtosis objective function biomedical signal Lagrangemultiplier method

Decoding the Moon Phase Display Device over the Front Dial of the Antikythera Mechanism

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Chinese Journal of Mechanical Engineering 2015年第4期28卷 676-683页

作者： LIN Jian Liang YAN Hong sen Department of Mechanical Engineering and University Museum National Cheng Kung University

The Antikythera mechanism is the most famous ancient astronomical calculator. The damaged excavation is a critical constraint for decoding the mechanism completely. By the systematic reconstruction design methodology, all feasible designs of the moon phase display device, which is one of the unclear mechanisms of the Antikythera mechanism, are reconstructed. These designs, including ordinary gear trains and epicyclic gear trains, are the simplest designs and satisfy the surviving evidence. The Antikythera mechanism and its reconstruction designs presented by LIN and YAN are introduced first. Three pointer types of the Antikythera mechanism are concluded based on their display motions and the orientation of the mechanism. In accordance with the analysis of the available interior reconstruction designs and the surviving evidence, four feasible designs of the moon phase display device are generated. All of them utilize the ball pointer with black and white that rotates around the radial axis to show cyclic moon phase. Two of these four feasible reconstruction designs are driven by one input source, and their bronze disks are fixed and rotatable respectively. Both of the remaining reconstruction designs are driven by two input sources, and their bronze disks are rotatable. Therefore, the four reconstruction designs of the moon phase display device reveal all possible display conditions of the moon phase pointers and the possible purposes of the bronze disk.

关键词： Antikythera mechanism moon phase display device reconstruction design gear train

Fluid inclusion studies of the Kenticha rare-element granite-pegmatite,Southern Ethiopia

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Acta Geochimica 2022年第6期41卷 926-946页

作者： Barsisa Bekele Amit Kumar sen Department of Earth Sciences Indian Institute of Technology RoorkeeRoorkeeIndia Department of Earth Sciences Wollega UniversityNekemteEthiopia

In the Kenticha area,a series of barren to rare metal-bearing pegmatites intruded into the Neoproterozoic Adola *** pegmatites host world-class Nb and Ta deposits and significant Li and Be *** this contribution,fluid inclusion data and feldspar geothermometry have been combined to define the crystallization condition of the Kenticha rare-metal *** and complex assemblages of secondary fluid inclusions representing episodic fluid circulations have been identified in quartz and spodumene.A primary aqueous-carbonic fluid of low salinity aqueous solution with liquid and vapour CO_(2) phases,secondary carbonic fluid rich and carboniconly fluids,and multiple generations of secondary aqueous inclusions that represent sub-solidus hydrothermal circulation have been *** aqueous inclusions were homogenized into the liquid phase between 100 and 290℃.Aqueous-carbonic inclusions were homogenized,usually via a critical transition[T_(h)(LV→SCF)]between 241 and 397℃,or less commonly,via a dew-point transition[T_(h)(LV→V)]between 213 and 264℃.Crystallization of the rare-element pegmatite is certainly associated with the late-stage magmatic or early hydrothermal low-salinity aqueous-carbonic fluid that homogenizes to critical conditions.A combination of microthermometric data and existing experimentally determined solidus from flux and volatile bearing haplogranite suggests exsolution of fluids from hydrous silicate melt,perhaps during crystallization of the aplitic *** fluids were then trapped and isobarically cooled along a reasonable geothermal gradient within the pegmatite unit down to a temperature of around 397℃.

关键词： Fluid inclusions Microthermometry Pegmatite Cooling-path Boiling Kenticha