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Factors attracting Chinese Generation Y in the smartphone application marketplace

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Frontiers of Computer Science 2017年第2期11卷 290-306页

作者： Shijian LUO yi hu Yuxiao ZHOU Department of Industrial Design College of Computer Science and Technology Zhejiang University Hangzhou 310027 China

Smartphone applications （apps） are becoming in- creasingly popular all over the world, particularly in the Chi- nese Generation Y population; however, surprisingly, only a small number of studies on app factors valued by this im- portant group have been conducted. Because the competition among app developers is increasing, app factors that attract users＇ attention are worth studying for sales promotion. This paper examines these factors through two separate studies. In the first study, i.e., Experiment 1, which consists of a survey, perceptual rating and verbal protocol methods are employed, and 90 randomly selected app websites are rated by 169 expe- rienced smartphone users according to app attraction. Twelve of the most rated apps （six highest rated and six lowest rated） are selected for further investigation, and 11 influential fac- tors that Generation Y members value are listed. A second study, i.e., Experiment 2, is conducted using the most and least rated app websites from Experiment 1, and eye tracking and verbal protocol methods are used. The eye movements of 45 participants are tracked while browsing these websites, providing evidence about what attracts these users＇ attention and the order in which the app components are viewed. The results of these two studies suggest that Chinese Generation Y is a content-centric group when they browse the smart- phone app marketplace. Icon, screenshot, price, rating, and name are the dominant and indispensable factors that influ- ence purchase intentions, among which icon and screenshot should be meticulously designed. Price is another key fac- tor that drives Chinese Generation Y＇s attention. The recom- mended apps are the least dominant element. Design sugges- tions for app websites are also proposed. This research has important implications.

关键词： app marketplace design online commerce,Generation Y HCI eye tracking

Influencing factor analysis of interception probability and classification-regression neural network based estimation

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Journal of Systems Engineering and Electronics 2023年第4期34卷 992-1006页

作者： NAN yi yi Guoxing hu Lei WANG Changhong TU Zhenbiao Department of Control Science and Engineering Harbin Institute of TechnologyHarbin 150001China Beijing Electro-mechanical Engineering Institute Beijing 100074China

The interception probability of a single missile is the basis for combat plan design and weapon performance evaluation,while its influencing factors are complex and mutually *** calculation methods have very limited analysis of the influence mechanism of influencing factors,and none of them has analyzed the influence of the guidance *** paper considers the influencing factors of both the interceptor and the target more *** parameters include speed,guidance law,guidance error,fuze error,and fragment killing ability,while target performance includes speed,maneuverability,and *** this paper,an interception model is established,Monte Carlo simulation is carried out,and the influence mechanism of each factor is analyzed based on the model and simulation ***,this paper proposes a classification-regression neural network to quickly estimate the interception probability based on the value of influencing *** proposed method reduces the interference of invalid interception data to valid data,so its prediction accuracy is significantly better than that of pure regression neural networks.

关键词： interception probability simulation modeling analysis of influencing factors probability estimation neural networks

Efficient Pairing Computation on Twisted Weierstrass Curves

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Chinese Journal of Electronics 2018年第4期27卷 739-745页

作者： WANG Bei OUYANG yi hu Honggang School of Mathematical Sciences University of Science and Technology of China School of Information Science and Technology University of Science and Technology of China

In this paper, we construct the twists of twisted Edwards curves in Weierstrass form. Then we define a new twisted Ate pairing on twisted Weierstrass curves named the Tx-Ate pairing. Following Miller’s algorithm, we give a computation of the Tx-Ate pairing on high degree twisted Weierstrass curves, where the point operations are over Edwards form, and the computation of Miller function is over Weierstrass form. Although, in one doubling loop, our method to compute the Tx-Ate pairing is a litter slower than the previously fastest *** twists, the Tx-Ate pairing can be calculated on more twisted Weierstrass curves with short loop length. The TxAte pairing is even competitive with optimal Ate pairing when they have the same short loop length.

关键词： Weierstrass curves Twisted Ate pairing Twisted Edwards curves Miller function

Optimal Combinations and Variable Departure Intervals for Micro Bus System

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Tsinghua Science and Technology 2017年第3期22卷 282-292页

作者： Jiaoyang Li Jianming hu yi Zhang Department of Automation Tsinghua UniversityBeijing 100084China

It is becoming increasingly difficult for Chinese citizens to access traditional public transport because of overcrowded community structures. Therefore, novel ideas are required to improve the transport system. In this respect, this study considers the design of a public transport scheduling model for a micro system. The model aims to minimize passenger waiting time and maximize number of passengers one bus carries, by simultaneously optimizing departure intervals and use of traditional and rapid buses. The model is superior to traditional models, as it analyzes the phenomena of vehicle overtaking, vehicle capacity limit, and passenger determination uncertainty. In addition, the model is a sophisticated nonlinear multi-objective optimization problem and contains more than one type of decision variable, therefore two composite algorithms, HPSO and GAPSO, are proposed, which are improvements of the Genetic Algorithm （GA） and Particle Swarm Optimization （PSO）. These two algorithms are compared to the classical GA with respect to stability and effect, and the results show them to be strong in both respects. In addition, the simultaneous optimization method has evident advantages compared to single-method optimizations.

关键词： bus scheduling optimization model rapid bus Particle Swarm Optimization (PSO) Genetic Algorithm(GA)

Effective regulation mechanisms of Fe-Ni(oxy)hydroxide:Ni-rich heteroatomic bonding(Ni–O–Fe–O–Ni)is essential

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Nano Research 2023年第10期16卷 12026-12034页

作者： Ruo-Yao Fan hui-ying Zhao Zi-yi Zhao Wen-hui hu Xin Liu Jian-Feng Yu Han hu Yong-ming Chai Bin Dong State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China Stanford PULSE Institute SLAC National Accelerator LaboratoryMenlo ParkCA 95025USA

Although Fe-Ni combination performs well in transition metal-based oxygen evolution reaction(OER)electrocatalysts,there are lack of clear and general regulations mechanism to fully play the synergistic catalytic ***,we made the utmost of the interaction of Fe–Ni heteroatomic pair to obtain a highly active Fe-Ni(oxy)hydroxide catalytic layer on iron foam(IF)and nickel foam(NF)by in-situ electrochemical deposition and rapid surface reconstruction,which only required 327 and 351 mV overpotential to provide a large current of 1,000 mA·cm^(−2),*** results confirm that the moderate Ni-rich heteroatomic bonding(Ni–O–Fe–O–Ni)formed by adjusting the Ni/Fe ratio on the catalyst surface is important to offer predominant OER *** is a key component that enhances OER activity of Ni(O)OH,but Fe-rich structural surface formed by Fe–O–Ni–O–Fe bonding is not ***,the remarkable oxygen evolution performance of the prepared Ni2Fe(O)OH/IF and FeNi2(O)OH/NF can be chalked up to the optimized electronic structure of Fe–Ni heteroatomic bonding,the efficient gas spillover,the fast electron transport,and nanosheet clusters *** summary,our work suggests a comprehensive regulation mechanism for the construction of efficient Fe-Ni(oxy)hydroxide catalytic layer on inexpensive,stable,and self-supporting metallic material surface.

关键词： Fe-Ni(oxy)hydroxide oxygen evolution reaction(OER) heteroatomic bonding Ni-rich structure regulation mechanisms

Predictive control of a direct internal reforming SOFC using a self recurrent wavelet network model

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第1期11卷 61-70页

作者： Jun LI Nan GAO Guang-yi CAO Heng-yong TU ming-ruo hu Xin-jian Zhu Jian LI Institute of Fuel Cell Department of Automation Shanghai Jiao Tong University Shanghai 200240 China Department of Mathematics Shanghai University Shanghai 200444 China College of Materials Science and Engineering Huazhong University of Seience and Technology Wuhan 430074 China

In this paper,an application of a nonlinear predictive controller based on a self recurrent wavelet network (SRWN) model for a direct internal reforming solid oxide fuel cell (DIR-SOFC) is presented. As operating temperature and fuel utilization are two important parameters,the SOFC is identified using an SRWN with inlet fuel flow rate,inlet air flow rate and current as inputs,and temperature and fuel utilization as outputs. To improve the operating performance of the DIR-SOFC and guarantee proper operating conditions,the nonlinear predictive control is implemented using the off-line trained and on-line modified SRWN model,to manipulate the inlet flow rates to keep the temperature and the fuel utilization at desired levels. Simulation results show satisfactory predictive accuracy of the SRWN model,and demonstrate the excellence of the SRWN-based predictive controller for the DIR-SOFC.

关键词： Direct internal reforming (DIR) Solid oxide fuel cell (SOFC) Predictive control Self recurrent wavelet network (SRWN)

A quenched trap model for non-Gaussian diffusion

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Science China(Physics,Mechanics & Astronomy) 2016年第12期59卷 78-79页

作者： Liang Luo ming yi Department of Physics College of Science Huazhong Agricultural University Institute of Applied Physics Huazhong Agricultural University

The experiments usually cannot fully arrive at the self- averaging time scale, even if some of the tracers can leave the initial basins. It is thus important to study the crossover from single basin non-Gaussian behavior to multi-basin Gaussian behavior. The crossover depends on complicated properties of the heterogeneous environment, which are not well under- stood yet. Our simple model focuses on the spatial correla- tion of the environment, which gives a theoretical framework to investigate the anomalous diffusion in heterogeneous envi- ronment. It is still an open question whether the dimension- ality of the environment is crucial to the results. To further compare the model with experiments, more detailed investi- gation is also required.

关键词： exp Figure

High-entropy oxide-supported platinum nanoparticles for efficient hydrogen evolution reaction

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Rare Metals 2024年第4期43卷 1537-1546页

作者： ming-Yu Fan Jia-Jun Wang Jun Zhao Hong Zhang Tian-yi Ma Xiao-Peng Han Wen-Bin hu School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining TechnologyTianjin UniversityTianjin300350China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China School of Science RMIT UniversityMelbourneVIC3000Australia

High-entropy oxides(HEOs)are a new class of single-phase structures with unique electronic and catalytic properties;therefore,it is worthwhile to explore their applications in *** this study,a Pt/(FeCoNiCrAl)_(3)O_(4)nanohybrid using HEO as a support was developed as an efficient catalyst for the hydrogen evolution reaction(HER).Pt/(FeCoNiCrAl)_(3)O_(4)exhibited high HER activity with a low overpotential of 22 mV at10 mA·cm^(-2),outperforming other binary,ternary,and quaternary *** HER activity of Pt/(FeCoNiCrAl)_(3)O_(4)was higher than that of a commercial Pt/C with a significantly lower Pt *** catalyst exhibited good activity and long-term stability(60 h)in an electrolytic water-splitting *** good activity can be attributed to the fact that the introduction of Pt effectively facilitates electronic interactions between Pt and the *** addition,the HEO substrate was more favorable for dispersing Pt particles,optimizing the electrochemical specific surface area,and significantly reducing the charge resistance of the *** study extends the application of HEOs in electrocatalysis and demonstrates the promising prospects of HEOs as supports for electrocatalysts.

关键词： High-entropy oxides Hydrogen evolution reaction Nanohybrid Water electrolysis

非静水压环境对U_(3)O_(8)高压拉曼声子行为的影响

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光谱学与光谱分析 2025年第1期45卷 59-65页

作者：王艺佳吴彬彬刘静仪房雷鸣刘本琼雷力四川大学原子与分子物理研究所四川成都610065 中国工程物理研究院核物理与化学研究所四川绵阳621022

八氧化三铀(U_(3)O_(8))是动力学和热力学最稳定的铀氧化物。研究U_(3)O_(8)的高压相稳定性和高压声子行为对其在核工业、催化剂等领域的应用具有重要参考价值。由于铀原子([Rn]5f^(3)6d^(1)7s^(2))和氧原子([He]2s^(2)2p^(4))核外电子... 详细信息

八氧化三铀(U_(3)O_(8))是动力学和热力学最稳定的铀氧化物。研究U_(3)O_(8)的高压相稳定性和高压声子行为对其在核工业、催化剂等领域的应用具有重要参考价值。由于铀原子([Rn]5f^(3)6d^(1)7s^(2))和氧原子([He]2s^(2)2p^(4))核外电子结构存在显著差异,因此很难通过同步辐射X射线衍射技术探测高压下铀氧化合物中U-O键合的细微变化。然而拉曼光谱对高压下U-O键合变化非常敏感,它能揭示物质在高压下包括键合或者化学计量等方面的重要信息。目前对U_(3)O_(8)高压结构相变的研究通常聚焦于静水压环境,而非静水压环境对U_(3)O_(8)高压相变的影响尚未得到深入研究。该研究基于金刚石对顶砧的高压拉曼散射技术探究了静水压和非静水压环境对正交α-U_(3)O_(8)高压相变与声子行为的影响。研究表明,静水压(8.1 GPa)和非静水压(8.2 GPa)条件下α-U_(3)O_(8)高压相变起始压力很接近。但由于非静水压环境中样品内的微区偏应力较大,因此非静水压环境中U_(3)O_(8)高压相变结束压力(16.4 GPa)比静水压环境中相应压力(18.5 GPa)约低2~3个GPa。同时本文给出了两对比实验中主拉曼模的一阶压力系数与Mode-Grüneisen参数γ。对比分析可知,高压相变前静水压条件下各主模零压下的一阶压力系数绝对值|dω/d P|几乎均大于非静水压条件下的相应值,这表明相变前非静水压环境中各拉曼模对压力响应不明显;一旦高压相变开始,由于较大微区偏应力的存在极大程度增强了铀氧原子外层电子的耦合作用,故相变后非静水压下压力系数绝对值显著增大。零压下B(6)2模的γ值最小,因此对外部扰动有更积极的响应。此外室温加压时A(3)2和A(4)2模(代表沿a轴氧原子的振动)的一阶压力系数通常小于B(4)2和B(6)2模(代表bc面内氧原子的位移),这表明α-U_(3)O_(8)高压相变前a轴比b、c轴更难被压缩。该工作深入探究了静水压和非静水压环境对α-U_(3)O_(8)高压相变的影响,为了解α-U_(3)O_(8)高压相稳定性和晶格动力学行为提供了重要参考。

关键词： U_(3)O_(8) 高压拉曼光谱高压相变非静水压