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Nano Research 2024年第6期17卷 5604-5613页

作者： Huijun kong Zhongqian Song Meichun Ding Changxiang Shao Jiahui Yu Baolei Wang Weiyan Li Chenwei Li Li Niu School of Chemistry and Pharmaceutical Engineering Shandong First Medical University and Shandong Academy of Medical SciencesJinan 250117China College of Artificial Intelligence and Big Data for Medical Sciences Shandong First Medical University and Shandong Academy of Medical SciencesJinan 250117China School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

The issue of sensitivity attenuation in high-pressure region has been a persistent concern for pressure-sensitive electronic *** order to tackle such trade-off between sensitivity and linear range,herein,a hybrid piezoresistive-supercapacitive(HRSC)strategy is proposed via introducing a piezoresistive porous aerogel layer between the charge collecting electrodes and iontronic films of the pressure ***,the HRSC-induced impedance regulation and supercapacitive behavior contribute to significant mitigation in sensitivity attenuation,achieving high sensitivity across wide linear range(44.58 kPa^(−1)from 0 to 3 kPa and 23.6 kPa^(−1)from 3 to 12 kPa).The HRSC pressure sensor exhibits a low detection limit of 1 Pa,fast responsiveness(~130 ms),and excellent cycling stability,allowing to detect tiny pressure of air flow,finger bending,and human ***,the HRSC sensor exhibits exceptional perception capabilities for proximity and temperature,broadening its application scenarios in prosthetic perception and electronic *** proposed HRSC strategy may boost the ongoing research on structural design of high-performance and multimodal electronic sensors.

关键词： multimodal sensor pressure sensor high sensitivity MXene/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)aerogel structural design

Some results on resolvable incomplete block designs

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Science china Mathematics 2005年第4期48卷 503-512页

作者： LIU Minqian & FANG Kaitai department of Statistics, Nankai university, Tianjin 300071, china department of Mathematics, hong kong Baptist university, hong kong, china department of Statistics Nankai University Tianjin China department of Mathematics Hong Kong Baptist University Hong Kong China

This paper is concerned with the uniformity of a certain kind of resolvable incomplete block (RIB for simplicity) design which is called the PRIB design here. A sufficient and necessary condition is obtained, under which a PRIB design is the most uniform in the sense of a discrete discrepancy measure, and the uniform PRIB design is shown to be connected. A construction method for such designs via a kind of U-type designs is proposed, and an existence result of these designs is given. This method sets up an important bridge between PRIB designs and U-type designs.

关键词： block design, discrepancy, orthogonal array, supersaturated design, U-type design.

Enhancing multifunctional photocatalysis with acetate-assisted cesium doping and unlocking the potential of Z-scheme solar water splitting

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Carbon Energy 2024年第3期6卷 178-195页

作者： Mengmeng Ma Jingzhen Li Xiaogang Zhu kong Liu Kaige Huang Guodong Yuan Shizhong Yue Zhijie Wang Shengchun Qu Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina department of Physics College of Physical Science and TechnologyXiamen UniversityXiamenChina State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijingChina

Graphitic carbon nitride(g-C_(3)N_(4))has been extensively doped with alkali metals to enlarge photocatalytic output,in which cesium(Cs)doping is predicted to be the most ***,the sluggish diffusion and doping kinetics of precursors with high melting points,along with imprecise regulation,have raised the debate on whether Cs doping could make *** this matter,we attempt to confirm the positive effects of Cs doping on multifunctional photocatalysis by first using cesium acetate with the character of easy *** optimized Csdoped g-C_(3)N_(4)(CCN)shows a 41.6-fold increase in visible-light-driven hydrogen evolution reaction(HER)compared to pure g-C_(3)N_(4) and impressive degradation capability,especially with 77%refractory tetracycline and almost 100%rhodamine B degradedwithin an *** penetration ofCs+is demonstrated to be a mode of interlayer doping,and Cs–N bonds(especially with sp^(2) pyridine N in C═N–C),along with robust chemical interaction and electron exchange,are *** atomic configuration triggers the broadened spectral response,the improved charge migration,and the activated photocatalytic ***,we evaluate the CCN/cadmium sulfide hybrid as a Z-scheme configuration,promoting the visible HER yield to 9.02 mmol g^(−1) h^(−1),which is the highest ever reported among all CCN *** work adds to the rapidly expanding field of manipulation strategies and supports further development of mediating served for photocatalysis.

关键词： acetate-assisted cesium doping multifunctional photocatalysis Z-scheme

On comparison of jump point detection for an exchange rate series

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Science china Mathematics 2004年第1期47卷 52-64页

作者： IP Wai-Cheung, WONG Heung, XIE Zhongjie & LUAN Yihuidepartment of Applied Mathematics, hong kong polytechnic university, hong kong, china department of Probability and Statistics, Peking university, Beijing 100871, china department of Applied Mathematics Hong Kong Polytechnic University Hong Kong China department of Probability and Statistics Peking University Beijing China

The main purpose of this paper is to investigate the detection of jump points of a discontinuous function in the presence of a noise by the wavelet approach. A computing algorithm of our method is proposed and then applied to the daily exchange rate of US Dollar against Deutsche Mark. All the points detected by our method reflect very strong economic and political impacts. Other statistical methods to detect jump points have also been applied to the same exchange rate data. Our proposed method has produced more convincing empirical results than others.

关键词： exchange rate, jump points, threshold, wavelets.

A path planning algorithm for a crop monitoring fixed-wing unmanned aerial system

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Science china(Information Sciences) 2024年第8期67卷 5-23页

作者： Longhao QIAN Yi Lok LO Hugh hong-tao LIU Institute of Aerospace Studies University of Toronto department of Mechanical Engineering The University of Hong Kong

With the growing demand for automation in agriculture, industries increasingly rely on drones to perform crop monitoring and surveillance. In this regard, fixed-wing unmanned aerial systems(UASs)are viable platforms for scanning a large crop field, given their payload capacity and range. To achieve maximum coverage without landing for battery replacement, an algorithm for producing a minimal required energy survey path is essential. Hence, an energy-aware coverage path planning algorithm is proposed *** constraints for a fixed-wing UAS to fly at low altitudes while achieving full coverage of the crop field are first analyzed. Then, the full path is decomposed into straight-line and U-turn primitives. Finally, an algorithm to calculate a combination of straight-line segments and U-turns is proposed to obtain the path with minimum required energy consumption. The genetic algorithm is used to efficiently determine the order of the straight-line paths to traverse. Case studies show that the proposed algorithm can produce planning results for a convex-polygon-shaped crop field.

关键词： path planning genetic algorithm energy minimization fixed-wing UAS aerial survey

A polynomial algorithm for finding (g,f)-colorings orthogonal to stars in bipartite graphs

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Science china Mathematics 2005年第3期48卷 322-332页

作者： LIU Guizhen & DENG Xiaotie department of Mathematics, Shandong university, Jinan 250100, china department of Computer Science, The City university of hong kong, hong kong, china department of Mathematics Shandong University Jinan China department of Computer Science The City University of Hong Kong Hong Kong China

Let G be a bipartite graph with vertex set V(G) and edge set E(G), and let g and f be two nonnegative integer-valued functions defined on V(G) such that g(x) ≤f(x)for every vertex x of V(G). A(g,f)-coloring of G is a generalized edge-coloring in which each color appears at each vertex x at least g(x) and at most f(x) times. In this paper a polynomial algorithm to find a(g, f)-coloring of a bipartite graph with some constraints using the minimum number of colors is given. Furthermore, we show that the results in this paper are best possible.

关键词： bipartite graph, (g, f)-coloring, (g, f)-factor, orthogonal coloring.

STUDY ON CONTROLLABILITY AND OBSERVABILITY FOR THIN PLATE SYSTEM WITH PARAMETER UNCERTAINTY

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Chinese Journal of Mechanical Engineering 1998年第3期11卷 60-67页

作者： Li Yiyang Ren Lihong Chen Guodong Liang Tianpei department of Mechanical Engineering, The hong kong polytechnic university, hong kong hong kong polytechnic Univ Hong Kong Hong Kong

The controllability and observability analysis of thin plate system with parameter uncertainty is presented using the degree of controllability/observability and the robustness index. It provides a guidance to the des... 详细信息

关键词： Degree of controllability/observability Robustness index Active vibration control

Theoretical insights into the structures and fundamental properties of pnictogen nitrides

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Chinese Physics B 2024年第9期33卷 474-479页

作者： Jingjing Wang Panlong kong Dingmei Zhang Defang Gao Zaifu Jiang Wei Dai School of Mathematics and Physics Jingchu University of TechnologyJingmen 448000China

Recent experimental advancements reported a chemical reaction between antimony and nitrogen under high temperature and high pressure,yielding crystalline antimony nitride(Sb_(3)N_(5))with an orthorhombic *** by this statement,we calculate the stability,elastic properties,electronic properties and energy density of the Cmc2_(1) structure for pnictogen nitrides X_(3)N_(5)(X=P,As,Sb,and Bi)using first-principles calculations combined with particle swarm optimization *** of formation enthalpies,elastic constants and phonon spectra show that P_(3)N_(5),As_(3)N_(5) and Sb_(3)N_(5) are thermodynamically,mechanically and kinetically stable at 35 GPa,whereas Bi_(3)N_(5) is mechanically and kinetically stable but thermodynamically *** computed electronic density of states shows strong covalent bonding between the N atoms and the phosphorus group atoms in the four compounds,confirmed by the calculated electronic localization *** also calculate the energy densities for Sb_(3)N_(5) and find it to be a potentially high-energy-density material.

关键词： pnictogen nitrides structural stability electronic property energy density

Multiple factors influencing high-purity indium electrolytic refining

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Chinese Journal of Chemical Engineering 2024年第7期71卷 148-160页

作者： hong-Qiang Fan Fei Li hong-Xing Zheng Wu-ji Pan Mei-Zhen Wu Yashar Behnamian Ju-Bo Peng Dong-Hai Lin State Key Laboratory of Advanced Special Steel&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai UniversityShanghai 200444China Research&Development Center Yunnan Tin Group(Holding)Limited CompanyKunming 650032China department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 2V4AlbertaCanada School of Energy and Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China

The effects of various contaminants in the electrolytic refinement of indium were investigated using a glow discharge mass spectrometer(GDMS).The effects of several factors such as the indium ion(In3+)concentration,the sodium chloride(NaCl)concentration,the current density,the gelatin concentration,the pH,and the electrode distance,were *** variations in impurity levels concerning gelatin concentration were *** the gelatin and In3+concentration were moderately positively correlated with the Pb *** Sb concentration was associated positively with the NaCl concentration,while the Ti concentration had an adverse correlation with the NaCl *** Bi element content was positively linked to the electrode *** the current density increased,Cu,Pb,and Bi impurities initially rose and then eventually ***,a critical current density of 45 A·m^(-2) was identified in this behavior.

关键词： High-purity indium Electrolysis Multiple factors Electrochemistry Purification

Research progress in spasmodic torticollis rehabilitation treatment

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World Journal of Clinical Cases 2024年第7期12卷 1205-1214页

作者： Shuang Zhang Ni Zeng Shuang Wu Hui-Hui Wu Mo-Wei kong department of Rehabilitation The Affiliated Hospital of Guizhou Medical UniversityGuiyang 550018Guizhou ProvinceChina department of Cardiology Guiqian International General HospitalGuiyang 550018Guizhou ProvinceChina

Spasmodic torticollis(ST)is a focal dystonia that affects adults,causing limited muscle control and impacting daily activities and quality of *** etiology and curative methods for ST remain *** toxin is widely used as a firstline treatment,but long-term usage can result in reduced tolerance and adverse *** therapy,with its minimal side effects and low potential for harm,holds significant clinical *** article explores the effectiveness of adjunctive therapies,including exercise therapy,transcranial magnetic stimulation,shockwave therapy,neuromuscular electrical stimulation,vibration therapy,electromyographic biofeedback,and acupuncture,in the treatment of *** aim is to provide clinicians with additional treatment options and to discuss the efficacy of rehabilitation therapy for ST.

关键词： Spasmodic torticollis Rehabilitation therapy Botulinum toxin Exercise therapy Adjunctive therapy Effectiveness