检索结果-南通市图书馆

Journal of Thermal Science 2019年第2期28卷 283-293页

作者： ZHANG Hongsheng zhao hongbin LI Zhenlin HU Eric College of Machinery and Transportation Engineering China University of Petroleum School of Mechanical Engineering the University of Adelaide Beijing Key Laboratory of Process Fluid Filtration and Separation

A new waste heat recovery system is presented to recover exhausted steam waste heat from the steam turbine by absorption heat pump(AHP) in a gas-steam combined cycle(GSCC) power plant. The system can decrease energy consumption and further improve the energy utilization. The performance evaluation criteria are calculated, and exergy analysis for key components are implemented in terms of the energy and exergy analysis theory. Besides, the change of these criteria is also revealed before and after modification. The net power output approximately increases by 21738 kW, and equivalent coal consumption decreases by 5.58 g/kWh. A 1.81% and 1.92% increase in the thermal and exergy efficiency is respectively obtained in the new integrated system as the heating load is 401095 kJ at 100% condition. Meanwhile, the appropriate extraction parameters for heating have been also analyzed in the two systems. The proposed scheme can not only save energy consumption but also reduce emission and gain great economic benefit, which is proven to be a huge potential for practical application.

关键词： combined cycle power plant absorption heat pump waste heat recovery evaluation criteria exergy analysis

Controlling the size of fragrance microcapsules using designed agitator paddles: Experiment and CFD simulation

在线全文

学校读者我要写书评

暂无评论

Particuology 2019年第2期17卷 38-45页

作者： hongbin zhao Xuening Fei Baolian Zhang Shuxing zhao Guangmin Li Lingyun Cao School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China School of Science Tianjin Chengjian University Tianjin 300384 China School of Materials Science and Engineering Tianjin Chengjian University Tianjin 300384 China School of Energy and Safety Engineering Tianjin Chengjian University Tianjin 300384 China

Controlling the size of fragranee microcapsules using designed agitator paddles was investigated and studied by CFD simulation. First, different fluid flows were established by varying stirring speeds, reactor scales, and agitator paddle design, and the effects of each on particle size and distribution of prepared microcapsules were determined. The experimental results showed that the pattern design of orifices in the plate paddles control the flow field well. Narrow particle-size distributio ns of the microcapsules were obtained. The fluid flow characteristics including fluid velocity field, turbulent kinetic energy field, and shear stress distribution for thedifferent agitator paddle types in different reaction kettles were simulated using CFD tech no logy. The correlations between simulated data and experime ntal results were an alyzed. Significantly, the simulated average flow velocity was found to show good negative linear correlation w让h the average particle size of prepared microcapsules, with a correlation of y =-2.166x + 42.626.

关键词： Fragrance microcapsule Melamine-formaldehyde Particle size Orifice stirring paddle CFD simulation

Synergistic interaction of three-dimensional ZnCdS@MoS2 heterostructures for high-efficiency visible-light photocatalytic degradation of dyes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2023年第4期33卷 442-449页

作者： Yingjiao Zhai Haowen He Mingze Xu hongbin zhao Jinhua Li Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing Nanophotonics and Biophotonics Key Laboratory of Jilin Province State Key Laboratory of High Power Semiconductor Lasers Changchun University of Science and Technology State Key Laboratory of Advanced Materials for Smart Sensing General Research Institute for Nonferrous Metals

High-performance photocatalysts should urgently be developed to efficiently solve serious environmental problems. Herein, we successfully synthesized a novel, visible-light activated, three-dimensional ZnCdS@MoS2photocatalyst using a simple, two-step hydrothermal process. Based on reaction time-dependence, the growth mechanism of “oriented attachment” of the ZnCdS@MoS2heterostructure is described in detail. The photodegradation of methylene blue(MB) indicated that the prepared sample has an outstanding photocatalytic activity owing to the accelerated photogenerated electron production rate, inhibited electron–hole pair recombination,improved visible light–utilization rate, and increased specific surface area. According to our experimental results,the degradation rate of MB using the ZnCdS@MoS2nanocomposite was as high as 99.3% after 100 min of visible-light irradiation. The photocatalyst remained stable without any obvious decrease in activity even after three cycles of use. This study provides a strong support for the design of high-performance photocatalysts and their application in optoelectronic devices.

关键词： ZnCdS@MoS2 Heterostructure Photocatalytic Visible-light Dye

Self-lubricate and anisotropic wear behavior of AZ91D magnesium alloy reinforced with ternary Ti_2AlC MAX phases

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2019年第3期35卷 275-284页

作者： Wenbo Yu Deqiang Chen Liang Tian hongbin zhao Xiaojun Wang Center of Materials Science and Engineering School of Mechanical and Electronic Control Engineering Beijing Jiaotong University National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and Technology Department of Materials Science and Engineering University of Michigan State Key Laboratory of Advanced Materials for Smart Sensing General Research Institute for Nonferrous Metals School of Materials Science and Engineering Harbin Institute of Technology

The dry sliding wear behavior of Ti_2AlC reinforced AZ91 magnesium composites was investigated at sliding velocity of 0.5 m/s under loads of 10, 20, 40 and 80 N using pin-on-disk configuration against a Cr15 steel disc. Wear rates and friction coefficients were registered during wear tests. Worn tracks and wear debris were examined by scanning electron microscopy, energy dispersive X-ray spectrometry and transmission electron microscopy in order to obtain the wear mechanisms of the studied materials. The main mechanisms were characterized as the magnesium matrix oxidation and self-lubrication of Ti_2AlC MAX phase. In all conditions, the composites exhibit superior wear resistance and self-lubricated ability than the AZ91 Mg alloy. In addition, the anisotropic mechanisms in tribological properties of textured Ti_2AlC-Mg composites were confirmed and discussed.

关键词： Ti2AlC Dry sliding wear Magnesium alloy Self-lubricate ability

Optimal Dispatching of Large-scale Water Supply System

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2003年第2期9卷 21-26页

作者：吕谋 SONG Shuang zhao hongbin ZHANG Tuqiao Department of Civil Engineering Zhejiang University Hangzhou 310013 P.R.China Department of Environmental Engineering Zhejiang University of Technology Hangzhou 310032 P.R.China Department of Municipal Engineering Harbin Institute of Technology Harbin 150001 P.R.China

This paper deals with the use of optimal control techniques in large-scale water distribution networks. According to the network characteristics and actual state of the water supply system in China, the implicit model, which may be solved by utilizing the hierarchical optimization method, is established. In special, based on the analyses of the water supply system containing variable-speed pumps, a software tool has been developed successfully. The application of this model to the city of Shenyang (China) is compared to experiential strategy. The results of this study show that the developed model is a very promising optimization method to control the large-scale water supply systems.

关键词： optimal dispatching water supply system water networks implicit model hierarchical optimization

Efficient Polymer Solar Cells Based on Solution-processed Vanadium Oxide as Hole-extracting Layer

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2013年第11期31卷 1423-1427页

作者： Biao Xiao Xiaoping Cheng Baofeng zhao hongbin Wu Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou Guangdong 510640 China

Here we reported the fabrication of efficient polymer solar cells from regioregular poly（3-hexylthiophene）（P3HT）：fullerene derivative [6,6]-phenyl-C61 butyric acid methyl ester （PC6jBM） mixtures, in which solution- processed vanadium oxide （VOx） was used as a hole-extracting layer （HEL）. The obtained devices exhibited a high power conversion efficiency of 3.96%, and can be enhanced to 4.06% and 4.16%, respectively, when two types of PEDOT：PSS with different conductivities were used in conjunction with the VOx layer. All the VOx-based devices showed a high fill factor （FF） over 70%, which was ascribed to efficient hole extracting efficiency associated with the solution-processed VOx hole-extracting layer. The origins of the improvement were also studied by transmission spectra, atomic force microscope （AFM）, and capacitance-voltage characteristics.

关键词： polymer solar cells vanadium oxide hole-extracting layer solution-processed

Study of energy-efficient heat resistance and cooling technology for high temperature working face with multiple heat sources in deep mine

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2023年第3期10卷 92-107页

作者： hongbin zhao Shihao Tu Xun Liu Jieyang Ma Long Tang Key Laboratory of Deep Coal Resource Mining(Ministry of Education of China) School of MinesChina University of Mining and TechnologyXuzhou 221116China

In the present research,we proposed a scheme to address the issues of severe heat damage,high energy consumption,low cooling system efficiency,and wastage of cold capacity in *** elucidate the seasonal variations of environmental temperature through field measurements,we selected a high-temperature working face in a deep mine as our engineering *** enhance the heat damage control cability of the working face and minimize unnecessary cooling capac-ity loss,we introduced the multi-dimensional heat hazard prevention and control method called"Heat source barrier and cooling equipment".First,we utilize shotcrete and liquid nitrogen injection to eliminate the heat source and implemented pressure equalization ventilation to disrupt the heat transfer path,thereby creating a heat ***,we establish divi-sional prediction models for airflow temperature based on the variation patterns obtained through numerical ***,we devise the location and dynamic control strategy for the cooling equipment based on the prediction *** results of field application show that the heat resistance and cooling linkage method comply with the safety requirement throughout the entire mining cycle while effectively reducing energy *** ambient temperature is maintained below 30℃,resulting in the energy saving of 10%during the high-temperature period and over 50%during the low-temperature *** findings serve as a valuable reference for managing heat damage in high-temperature working faces.

关键词： High-temperature working face Heat source barrier Multiple heat source effect Airflow temperature prediction Dynamic control strategy

Crop Classification Using MODIS NDVI Data Denoised by Wavelet: A Case Study in Hebei Plain, China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Geographical Science 2011年第3期21卷 322-333页

作者： ZHANG Shengwei LEI Yuping WANG Liping LI Hongjun zhao hongbin Inner Mongolia Agricultural University Hohhot 010018 China Center for Agricultural Resources Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Shijiazhuang 050021 China

Time-series Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) data have been widely used for large area crop ***,the temporal crop signatures generated from these data were always accompanied by *** this study,a denoising method combined with Time series Inverse Distance Weighted (T-IDW) interpolating and Discrete Wavelet Transform (DWT) was *** detail crop planting patterns in Hebei Plain,China were classified using denoised time-series MODIS NDVI data at 250 m *** denoising approach improved original MODIS NDVI product significantly in several periods,which may affect the accuracy of *** MODIS NDVI-derived crop map of the Hebei Plain achieved satisfactory classification accuracies through validation with field observation,statistical data and high resolution *** field investigation accuracy was 85% at pixel *** county-level,for winter wheat,there is relatively more significant correlation between the estimated area derived from satellite data with noise reduction and the statistical area (R2 = 0.814,p < 0.01).Moreover,the MODIS-derived crop patterns were highly consistent with the map generated by high resolution Landsat image in the same *** overall accuracy achieved 91.01%.The results indicate that the method combining T-IDW and DWT can provide a gain in time-series MODIS NDVI data noise reduction and crop classification.

关键词： remote sensing imagery Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Differ- ence Vegetation Index (NDVI) noise reduction crop land classification

Facile one-step synthesis of Cu_2O@Cu sub-microspheres composites as anode materials for lithium ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2018年第7期34卷 1085-1090页

作者： Huijie Zhou hongbin zhao Xuan Zhang Hongwei Cheng Xionggang Lu Qian Xu State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering Shanghai University College of Sciences Shanghai University

Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 nm was successfully fabricated by one-step synthesis through the direct thermal decomposition of copper nitrate （Cu（NO3）2） in octadecylamine （ODA） solvent. As anode materials for lithium ion batteries, the Cu2O@Cu composites obviously possess high specific capacity, excellent cyclic stability and rate capability. The coulombic efficiency is about 84% in the 1 st cycle and increases significantly up to 97.8% during successive cycles at various current densities. Even under a high current density of 500 mA g^-l, the discharge capacity of Cu2O@Cu composites remains up to 200 mAh g^-1. The excellent electrochemical properties are ascribed to the synergistic effect between high electronic conductivity and volume-buffering capacity of metallic copper composited with Cu2O.2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology.

关键词： Cu2O@Cu composites Anode materials Octadecylamine One-step synthesis

INORGANIC MEMBRANE－BASED ROUTE TO THE SYNTHESIS OF NANO－PARTICLE PALLADIUM

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 1996年第4期17卷 2-3页

作者：Ｚｈａｏ　ＨｏｎｇｂｉｎＬｉ　ＡｎｗｕＧｕ　ＪｉｎｇｈｕａＸｉｏｎｇ　ＧｕｏｘｉｎｇＣｈｉｎｅｓｅ　Ａｃａｄｅｍｙ　ｏｆ　ＳｃｉｅｎｃｅｓＤａｌｉａｎ　Ｉｎｓｔｉｔｕｔｅ　ｏｆ　Ｃｈｅｍｉｃａｌ　ＰｈｙｓｉｃｓＳｔａｔｅ　Ｋｅｙ　Ｌａｂｏｒａｔｏｒｙ　ｏｆ　Ｃａｔａｌｙｓｉｓ

ＩＮＯＲＧＡＮＩＣＭＥＭＢＲＡＮＥ┐ＢＡＳＥＤＲＯＵＴＥＴＯＴＨＥＳＹＮＴＨＥＳＩＳＯＦＮＡＮＯ┐ＰＡＲＴＩＣＬＥＰＡＬＬＡＤＩＵＭＺｈａｏＨｏｎｇｂｉｎ，ＬｉＡｎｗｕ，ＧｕＪｉｎｇｈｕａ，ＸｉｏｎｇＧｕｏｘｉｎｇ＊... 详细信息

ＩＮＯＲＧＡＮＩＣＭＥＭＢＲＡＮＥ┐ＢＡＳＥＤＲＯＵＴＥＴＯＴＨＥＳＹＮＴＨＥＳＩＳＯＦＮＡＮＯ┐ＰＡＲＴＩＣＬＥＰＡＬＬＡＤＩＵＭＺｈａｏＨｏｎｇｂｉｎ，ＬｉＡｎｗｕ，ＧｕＪｉｎｇｈｕａ，ＸｉｏｎｇＧｕｏｘｉｎｇ＊（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏ...

关键词： Alumina membrane Nano palladium Catalytic membrane Impregnation