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A low-resistance elbow with a bionic sawtooth guide vane in ventilation and air conditioning systems

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Building Simulation 2022年第1期15卷 117-128页

作者： Chi Zhang Angui Li Jigang Che Yue Li Qi Liu yuhang zhao School of Building Services Science and Engineering Xi'an University of Architecture and Technology(XAUAT)Xi'an 710055China The Artificial Environment Control Technology Achievement Innovation Center of XAUAT and Yantai Yantai 264006China

Elbow resistance is an important part of energy consumption in ventilation and air conditioning(VAC)*** considering the structural characteristics of bat wings and humpback whale pectoral fins,a simplified leading edge for sawtooth guide vanes is *** on the theory of fluid mechanics,the resistance reduction mechanism of the sawtooth guide vane is *** numerical calculation results show that proper sawtooth groove parameters for the guide vane can effectively reduce the elbow *** with that for a normal guide vane,the maximum resistance can be reduced by approximately 9%with the new *** addition,we analyze the influence of the sawtooth guide vane on the entropy production of the duct elbow and the relationship between entropy production and the resistance of the duct ***,the resistance reduction performance of the sawtooth guide vane is verified through full-scale tests.

关键词： bionic sawtooth grooves guide vane resistance entropy production

Structure design and coordinated motion analysis of bionic crocodile robot

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Biomimetic Intelligence & Robotics 2024年第2期4卷 50-62页

作者： Jun Wang Jingya Zheng yuhang zhao Kai Yang School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China

Crocodiles,one of the oldest and most resilient species on Earth,have demonstrated remarkable locomotor abilities both on land and in water,evolving over millennia to adapt to diverse *** this study,we draw inspiration from crocodiles and design a highly biomimetic crocodile robot equipped with multiple degrees of freedom and articulated trunk *** design is based on comprehensive analysis of the structural and motion characteristics of real *** bionic crocodile robot has a problem of limb-torso incoordination during *** solve this problem,we used the D-H method for both forward and inverse kinematics analysis of the robot's legs and *** a series of simulation experiments,we investigated the robot's motion stability,fault tolerance,and adaptability to environments in two motor patterns:with and without spine and tail *** experimental results show that the bionic crocodile robot exhibits superior motion performance when the spine and tail cooperate with the *** study not only demonstrates the potential of biomimicry in robotics but also underscores the significance of understanding how nature's designs can inform and enhance technological innovations.

关键词： Bionic crocodile robot Kinematic modeling Motion simulation Multipart coordination

A statistical analysis of the freshness of postharvest leafy vegetables with application of water based on chlorophyll fluorescence measurement

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Information Processing in Agriculture 2017年第4期4卷 269-274页

作者： Yichen Qiu yuhang zhao Juan Liu Ya Guo School of IoT Engineering Jiangnan UniversityWuxi 214122China Wuxi Big Bridge Academy WuxiChina Wuxi Institute of Technology Wuxi 214121China

Vegetable freshness is very important for both restaurant and home *** market,sellers frequently apply water to leafy vegetables to make them not lose weight and look fresh;however,these vegetables may not be stored for a long time as they *** a time limit,they may be quickly *** is thus meaningful to investigate early and simple detection tools to measure leafy vegetable freshness while they are frequently applied water in *** this work,three types of newly harvested leafy vegetables were bought from a local farmer market and stored in the air with room temperature and roots submerging in *** a fluorescence(ChlF)from the vegetables was measured each half a day for three *** obtained ChlF data were analyzed statistically and the correlation of ChlF parameters and vegetable freshness/storage time was *** k-mean classification was also *** is found that Fo,Fj,Fm/Fo,and Fv/Fm can be used as an early detection tool to differentiate the freshness of leafy vegetables on which water is constantly applied in storage without visible difference.

关键词： Vegetable freshness Chlorophyll fluorescence Food measurement

Research progress on hybrid organic-inorganic perovskites for photo-applications

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Chinese Chemical Letters 2020年第12期31卷 3055-3064页

作者： Zengxi Wei yuhang zhao Jie Jiang Weibo Yan Yuezhan Feng Jianmin Ma Advanced Catalytic Engineering Research Center of the Ministry of Education School of Physics and ElectronicsHunan UniversityChangsha 410082China Hunan Key Laboratory of Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410082China Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(1AM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Key Lxiboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China

Hybrid organic-inorganic perovskite materials have attracted significant atte ntion of most re searchers in recently years,which is ascribed to the superior photoelectric properties,such as the suitable band gaps for harvesting sunlight,and exhibit high optical adsorption,high charge-carrier lifetimes and long diffusion *** photodetectors,light-emitting diodes,solar cells and photocatalysts represent the remarkable applications for the hybrid organic-inorganic perovskite ***,we review the recent progress of hybrid organic-inorganic perovskite-based photodetectors,light-emitting diodes,solar cells and *** challenges and outlook for the hybrid organic-inorganic perovskitebased photodetectors,light-emitting diodes,solar cells and photocatalysts are considered.

关键词： Hybrid organic-inorganic perovskite Photodetectors Light-emitting diodes Solar cells Photocatalysts

Polymer-Decorated 2D MoS2 Synaptic Transistors for Biological Bipolar Metaplasticities Emulation

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Chinese Physics Letters 2020年第8期37卷 177-188页

作者： yuhang zhao Biao Liu Junliang Yang Jun He Jie Jiang Hunan Key Laboratory of Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China

Biological bipolar metaplasticities were successfully mimicked in two-dimensional(2D)MoS2 transistors via the implementation of two different MoS2 surface decorations,poly(vinyl alcohol)(PVA)and chitosan ***,the depressing metaplasticity was successfully mimicked when the PVA bio-polymer was used as the surface decoration layer,whereas the metaplasticity of long-term potentiation was realized when the chitosan bio-polymer was taken as the surface decoration ***,the electronic band structures of the 2D MoS2 devices with different surface decorations were further investigated using first-principles calculations for understanding the underlying mechanisms of such bipolar *** results will deepen our understanding of metaplasticity,and have great potential in neuromorphic computing applications.

关键词： MoS2 poly(vinyl plasticity

AN EFFICIENT APPROACH TO COMMENT SPAM IDENTIFICATION

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Journal of Electronics(China) 2009年第5期26卷 644-650页

作者： Yang yuhang zhao Tiejun Zheng Dequan Yu Hao MOE-MS Key Laboratory of Natural Language Processing and Speech Harbin Institute of Technology Harbin 150001 China

This paper proposes a novel approach to comment spam identification based on content analysis. Three main features including the number of links, content repetitiveness, and text similarity are used for comment spam identification. In practice, content repetitiveness is determined by the length and frequency of the longest common substring. Furthermore, text similarity is calculated using vector space model. The precisions of preliminary experiments on comment spam identification conducted on Chinese and English are as high as 93% and 82% respectively. The results show the validity and language independency of this approach. Compared with conventional spam filtering approaches, our method requires no training, no rule sets and no link relationships. The proposed approach can also deal with new comments as well as existing comments.

关键词： Comment spam Automatic identification Content analysis Blog

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基于CEEMDAN与自相关函数的心音去噪

软件工程 2025年第1期28卷 14-18页

作者：唐瑭卢官明戚继荣王洋赵宇航南京邮电大学通信与信息工程学院江苏南京210003 南京医科大学儿科学院江苏南京210008

为有效去除心音信号中的噪声,提出基于CEEMDAN(Complete Ensemble Empirical Mode Decomposition with Adaptive Noise)与自相关函数的心音去噪算法。首先,通过CEEMDAN将含噪的心音信号分解为具有不同尺度特征的IMF(Intrinsic Mode Function)分量;其次,根据噪声与心音的自相关函数性质不同,界定IMF分量的信噪分界点;最后,对以噪声为主的IMF分量进行均值滤波,并将其与以心音为主的IMF分量重构得到去噪后信号。实验表明,在不同的噪声水平下,与小波软阈值去噪算法、小波硬阈值去噪算法、CEEMDAN去噪算法相比,所提算法的信噪比最高,均方根误差最小,在去除噪声的同时,可以较好地保留心音信号中的有效信息。

关键词：心音去噪 CEEMDAN 自相关函数均值滤波

Predictive Model of Oxaliplatin-induced Liver Injury Based on Artificial Neural Network and Logistic Regression

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Journal of Clinical and Translational Hepatology 2023年第7期11卷 1455-1464页

作者： Rui Huang Yuanxuan Cai Yisheng He Zaoqin Yu Li zhao Tao Wang Xiaofang Shangguan yuhang zhao Zherui Chen Yunzhou Chen Chengliang Zhang School of Pharmacy Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiChina Ciechanover Institute of Precision and Regenerative Medicine School of MedicineThe Chinese University of Hong Kong-ShenzhenShenzhenGuangdongChina Tongji Hospital Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiChina Hubei Center for Adverse Drug Reaction/Adverse Drug Event Monitoring WuhanHubeiChina National Center for Adverse Drug Reaction Monitoring BeijingChina School of Statistics and Mathematics Zhongnan University of Economics and LawWuhanHubeiChina

Background and Aims:Identifying potential high-risk groups of oxaliplatin-induced liver injury(OILI)is valuable,but tools are *** artificial neural network(ANN)and logistic regression(LR)models will be developed to predict the risk of ***:The medical information of patients treated with oxaliplatin between May and November 2016 at 10 hospitals was collected *** used the updated Roussel Uclaf causality assessment method(RUCAM)to identify cases of OILI and summarized the patient and medication ***,the ANN and LR models for predicting the risk of OILI were developed and ***:The incidence of OILI was 3.65%.The median RUCAM score with interquartile range was 6(4,9).The ANN model performed similarly to the LR model in sensitivity,specificity,and *** discrimination,the area under the curve of the ANN model was larger(0.920>0.833,p=0.019).In calibration,the ANN model was slightly *** important predictors of both models overlapped partially,including age,chemotherapy regimens and cycles,single and total dose of OXA,glucocorticoid drugs,and antihistamine ***:When the discriminative and calibration ability was given priority,the ANN model outperformed the LR model in predicting the risk of *** chemotherapy drugs in oxaliplatin-based chemotherapy regimens could have different degrees of impact on *** suspected that OILI may be idiosyncratic,and chemotherapy dose factors may be weakly *** making on prophylactic medications needs to be carefully considered,and the actual preventive effect needed to be supported by more evidence.

关键词： Oxaliplatin Liver injury Adverse drug reaction RUCAM Pharmacovigilance

Machine Learning-Based Intelligent Auscultation Techniques in Congenital Heart Disease:Application and Development

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Congenital Heart Disease 2024年第2期19卷 219-231页

作者： Yang Wang Xun Yang Mingtang Ye yuhang zhao Runsen Chen Min Da Zhiqi Wang Xuming Mo Jirong Qi Department of Cardiothoracic Surgery Children’s Hospital of Nanjing Medical UniversityNanjingChina

Congenital heart disease(CHD),the most prevalent congenital ailment,has seen advancements in the“dual indi-cator”screening *** facilitates the early-stage diagnosis and treatment of children with CHD,subse-quently enhancing their survival *** cardiac auscultation offers an objective reflection of cardiac abnormalities and function,its evaluation is significantly influenced by personal experience and external factors,rendering it susceptible to misdiagnosis and *** recent years,continuous progress in artificial intelli-gence(AI)has enabled the digital acquisition,storage,and analysis of heart sound signals,paving the way for intelligent CHD auscultation-assisted diagnostic *** there has been a surge in studies based on machine learning(ML)within CHD auscultation and diagnostic technology,most remain in the algorithmic research phase,relying on the implementation of specific datasets that still await verification in the clinical *** paper provides an overview of the current stage of AI-assisted cardiac sounds(CS)auscultation technology,outlining the applications and limitations of AI auscultation technology in the CHD *** aim is to foster further development and refinement of AI auscultation technology for enhanced applications in CHD.

关键词： Congenital heart disease heart sound auscultation artificial intelligence machine learning