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Journal of Thermal Science 2023年第6期32卷 2048-2064页

作者： YAO Shouguang ZUO Min huang xinyu School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang212100China

Adding fins to a shell-and-tube phase change thermal storage is a simple and effective way to enhance the performance of the phase change heat storage unit,and the proper arrangement of the fins is essential to enhance the performance of the storage *** enhance the performance of the triplex-tube thermal storage unit,a novel V-shaped fin structure is presented in this *** the heat storage performance of the thermal storage system is studied by numerical ***,the performance of the triplex-tube thermal energy storage unit with different arrangements of V-shaped fins is investigated by a two-dimensional model and compared with the use of the traditional rectangular fin structure,and the optimal fin arrangement is *** results show that the V-shaped fins with the optimal arrangement can decrease the time for the PCM melting in the heat storage unit by 31.92%compared to the conventional rectangular *** this basis,the influence of fin angle and thickness on the heat storage unit was ***,a three-dimensional model of the thermal storage unit was *** the effect of the flow parameters(inlet temperature,inlet flow rate)of the heat transfer fluid(HTF)on its performance was discussed in ***,the stored energy analysis of the whole thermal storage unit is carried out.

关键词： triplex-tube thermal energy storage V-shaped fin latent heat storage melting heat transfer enhancement

Global cooling in the immediate future?

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Chinese Science Bulletin 2010年第33期55卷 3847-3852页

作者： WANG ShaoWu WEN xinyu huang JianBin Department of Atmospheric and Oceanic Sciences School of Physics Peking University Beijing 100871 China

New perspectives regarding the possible cooling of the Earth's climate as a result of solar changes are reviewed in this *** major findings include:(1)solar activity is weakening to its very low level,which is comparable with the level in the early 20th century;(2)the current grand solar maximum has already lasted for eight 11-year solar cycles and might end in the coming one/two 11-year cycles;(3)a grand solar minimum might prevail in the next 100-200 years;and(4)the number of sunspots in the coming solar maximum(M)-year,around 2013,is an important indicator that needs to be closely monitored.

关键词：全球变冷地球气候变化太阳活动太阳能太阳周期太阳黑子年周期

Engineering porous organic polymers for carbon dioxide capture

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Science China Chemistry 2017年第8期60卷 1007-1014页

作者： Ning huang Gregory Day xinyu Yang Hannah Drake Hong-Cai Zhou Department of Chemistry Texas A＆M University College Station TX 77843 US

As atmospheric CO_2 levels rise, the development of physical or chemical adsorbents for CO_2 capture and separation is of great importance on the way towards a sustainable low-carbon future. Porous organic polymers are promising candidates for CO_2 capture materials owing to their structural flexibility, high surface area, and high stability. In this review, we highlight high-performance porous organic polymers for CO_2 capture and summarize the strategies to enhance CO_2 uptake and selectivity, such as increasing surface area, increasing interaction between porous organic polymers and CO_2, and pore surface functionalization.

关键词： porous organic polymers C02 capture nanomaterials post-synthesis polymer

High-performance formaldehyde prediction for indoor air quality assessment using time series deep learning

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Building Simulation 2024年第3期17卷 415-429页

作者： Liu Lu xinyu huang Xiaojun Zhou Junfei Guo Xiaohu Yang Jinyue Yan School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’anChina Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina Future Energy Profile School of BusinessSocietyand EngineeringMälardalen UniversityVästeråsSweden

Indoor air pollution resulting from volatile organic compounds(VOCs),especially formaldehyde,is a significant health concern needed to predict indoor formaldehyde concentration(Cf)in green intelligent building *** study develops a thermal and wet coupling calculation model of porous fabric to account for the migration of formaldehyde molecules in indoor air and cotton,silk,and polyester fabric with heat flux in Harbin,Beijing,Xi’an,Shanghai,Guangzhou,and Kunming,*** time-by-time indoor dry-bulb temperature(T),relative humidity(RH),and Cf,obtained from verified simulations,were collated and used as input data for the long short-term memory(LSTM)of the deep learning model that predicts indoor multivariate time series Cf from the secondary source effects of indoor fabrics(adsorption and release of formaldehyde).The trained LSTM model can be used to predict multivariate time series Cf at other emission times and *** LSTM-based model also predicted Cf with mean absolute percentage error(MAPE),symmetric mean absolute percentage error(SMAPE),mean absolute error(MAE),mean square error(MSE),and root mean square error(RMSE)that fell within 10%,10%,0.5,0.5,and 0.8,*** addition,the characteristics of the input dataset,model parameters,the prediction accuracy of different indoor fabrics,and the uncertainty of the data set are *** results show that the prediction accuracy of single data set input is higher than that of temperature and humidity input,and the prediction accuracy of LSTM is better than recurrent neural network(RNN).The method’s feasibility was established,and the study provides theoretical support for guiding indoor air pollution control measures and ensuring human health and safety.

关键词： multivariate time series formaldehyde concentration deep learning heat-humidity coupling mass transfer secondary source effect

Evidence and modeling study of droughts in China during 4―2 ka BP

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Chinese Science Bulletin 2008年第14期53卷 2215-2221页

作者： WANG ShaoWu huang JianBin WEN xinyu ZHU JinHong Department of Atmospheric Sciences School of Physics Peking University Beijing 100871 China

Four periods with predominated droughts are identified in 4―2 ka BP according to documentary data, namely 3.6―3.5, 3.1―3.0, 2.8―2.7, and 2.45―2.35 ka BP. Palaeo-environmental data indicated that droughts were predominated in 4―2 ka BP in the south of Northeast China, Inner-Mongolia, east of Qinghai-Tibetan Plateau, and South China. Modeling study shows that precession may be responsible for the occurrence of droughts in 4―2 ka BP, integrating the GCM with forcing of insolation.

关键词：中国干旱地区模式研究环境监测

Room-temperature infrared photodetectors with hybrid structure based on two-dimensional materials

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Chinese Physics B 2019年第1期28卷 82-100页

作者： Tiande Liu Lei Tong xinyu huang Lei Ye School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Two-dimensional(2D) materials, such as graphene, transition metal dichalcogenides(TMDs), black phosphorus(BP),and related derivatives, have attracted great attention due to their advantages of flexibility, strong light–matter interaction,broadband absorption, and high carrier mobility, and have become a powerful contender for next-generation infrared photodetectors. However, since the thickness of 2D materials is on the order of nanometers, the absorption of 2D materials is very weak, which limits the detection performance of 2D materials-based infrared photodetectors. In order to solve this problem, scientific researchers have tried to use optimized device structures to combine with 2D materials for improving the performance of infrared photodetectors. In this review, we review the progress of room-temperature infrared photodetectors with hybrid structure based on 2D materials in recent years, focusing mainly on 2D–nD(n = 0, 1, 2) heterostructures, the integration between 2D materials and on-chip or plasmonic structure. Finally, we summarize the current challenges and point out the future development direction.

关键词： two-dimensional materials heterostructure infrared photodetectors

Analysis and Control of Modular Multi-terminal DC Power Flow Controller with Fault Current Limiting Function

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Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1375-1385页

作者： Qianming Xu xinyu huang Xu Chu Mingshen Li Zhikang Shuai Chunming Tu Josep M.Guerrero College of Electrical and Information Engineering Hunan University Department of Energy Technology Aalborg University

In order to overcome the problems of power flow control and fault current limiting in multi-terminal high voltage direct current(MTDC)grids,this paper proposes a modular multi-terminal DC power flow controller(MM-DCPFC)with fault current limiting *** topology structure,operation principle,and equivalent circuit of MM-DCPFC are introduced,and such a structure has the advantages of modularity and *** power balance mechanism is studied and a hierarchical power balance control strategy is *** results show that MM-DCPFC can achieve internal power exchange,which avoids the use of external power *** fault characteristics of MM-DCPFC are analyzed,fault current limiting and self-protection methods are proposed,and the factors affecting the current limiting capability are *** simulation models are established in PLECS,and the simulation results verify the effectiveness of MM-DCPFC in power flow control,fault current limiting,and *** addition,a prototype is developed to validate the function and control method of MM-DCPFC.

关键词： Fault current limiting multi-terminal high volt-age direct current(MTDC)grid power balance DC power flow controller

Total process of fault diagnosis for wind turbine gearbox,from the perspective of combination with feature extraction and machine learning:A review

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Energy and AI 2024年第1期15卷 356-373页

作者： Xinhua Xu xinyu huang Haibin Bian Jiani Wu Chen Liang Feiyun Cong Huadian(Ningxia)Energy Co.Ltd.New Energy Branch No.55Xihu StreetNingchuan 750016China State Key Laboratory of Fluid Power&Mechatronic System Zhejiang UniversityZhejiangHangzhou 310027China Huadian Zhengzhou Machinery Design&Research Institute Co.Ltd. No.28Huxinhuandao RdZhengzhou 450046China

With the increasing of the installed capacity of wind power,the condition monitoring and maintains technique is becoming more *** Turbines(WT)gearbox is one of the key wind power components as it plays the role of power transmission and speed *** this,a number of scholars have pay attention to the fault diagnosis of WT *** efficiency of Machine Learning(ML)algorithms is highly correlated with signal type,data quality,and extracted features *** implementation of ML techniques has proven to be advantageous in simplifying the comprehension prerequisites for fault diagnosis technology concerning fault *** and more current studies predominantly concentrate on the utilization and fine-tuning of ML algorithms,while providing limited insights into the features of the acquired ***,it is necessary to review the research in recent years from the perspective of the combination of feature extraction and ML algorithms,and provide a detailed direction for future WT gearbox fault diagnosis technology *** this paper,data processing algorithms and typical fault diagnosis methods based on ML methods for WT gearbox are *** the using of ML method in WT gearbox fault diagnosis,the data prepared for training is very *** paper firstly reviewed the data analysing method which will support the ML *** data analysing methods include data acquisition,data preprocessing and feature extraction *** extraction plays a pivotal role in the realm of gearbox fault diagnosis,as it serves as the essence of effective *** review will primarily focus on exploring methods that enable the utilization of efficient features in combination with ML techniques to achieve accurate gearbox fault *** typical ML method for WT gearbox fault diagnosis are carefully ***,some prospects for future research directions are discussed in the end.

关键词： Wind turbine gearbox Machine learning Fault diagnosis Artificial neural network

Research on the Teaching Design of Advanced Mathematics Courses Based on Outcome-Based Education Concept

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Journal of Contemporary Educational Research 2024年第6期8卷 148-154页

作者： xinyu huang School of Finance and Mathematics West Anhui UniversityLu’an 237000Anhui ProvinceChina

This paper first analyzes the characteristics and current situation of the Advanced Mathematics course;secondly,it proposes a teaching model that integrates the outcome-based education(OBE)philosophy and blended teaching method,reorganizing the teaching objectives,teaching content,and assessment evaluation process of the Advanced Mathematics course;lastly,through practice,it is proved that this approach can effectively improve students’mastery of course content,enhance students’ability to apply mathematical knowledge,and strengthen teaching effectiveness.

关键词： Advanced Mathematics Outcome-based education concept Blended teaching method Online publication:July 3,2024

Heat and Humidity Transport Analysis Inside a Special Underground Building

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Frontiers in Heat and Mass Transfer 2023年第1期21卷 47-63页

作者： Jian Ai Jie Xue Jiabang Yu xinyu huang Pan Wei Xiaohu Yang Bengt Sundén China Northwest Architecture Design and Research Institute Co.Ltd.Xi’an710018China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an710049China Lund University Lund22100Sweden

The calculation of heat and humidity load serves as the cornerstone of Heating,Ventilation,and Air Conditioning(HVAC)***,as the heat and humidity load characteristics of underground structures differ substantially from those of above-ground structures,it is a challenge to derive their accurate calculation procedure through engineering ***,it is particularly important to carry out quantitative research on heat and humidity *** study used Design Builder software to study the influence of the design state point of air conditioning in underground buildings on energy *** study showed that compared with the single design temperature of 18℃,setting the temperature of 16℃ in winter and 22℃ in summer could reduce energy consumption by about 59%.And the hourly heat load,cooling load and humidity load in one year are simulated and calculated so as to quantitatively analyze the characteristics of the *** provides a database for selecting suitable HVAC *** is further emphasized that dehumidification is the key to HVAC design of underground structures,which provides a reference for similar engineering designs.

关键词： Heat and humidity load Design Builder simulation energy consumption