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Journal of Ocean University of China 2016年第4期15卷 711-718页

作者： CHEN Tiejun hou Hu LU Jiaohan ZHANG kai LI Bafang College of Food Science and Engineering Ocean University of China

The objective of this study was to investigate the effect of gelatin(SG) isolated from salmon skin and its hydrolysate(SGH) on photoaging skin, and the mechanism responsible for anti-photoaging. The average molecular weights of SG and SGH were 65 k Da and 873 Da, respectively. The amino acid compositions of SG and SGH were similar. Both of them were abundant in hydrophobic amino acids. Twenty-five peptides were identified from SGH. SG and SGH could improve UV irradiation-induced pathological changes of macroscopical tissue texture and skin morphology. Hydroxyproline content is an indicator of matrix collagen content, SG and SGH could inhibit the decrease of hydroxyproline content in photoaging skin in a dose dependent manner. In addition, SG and SGH could alleviate UV irradiation-induced oxidative damages to skin by increasing the activities of total superoxide dismutase(T-SOD), glutathione peroxidase(GSH-Px) and catalase(CAT), increasing the content of glutathione(GSH) and decreasing the content of malonaldehyde(MDA). Moreover, SG and SGH could enhance immune regulation system by increasing the thymus index. Thus, the anti-photoaging mechanisms of SG and SGH were by inhibiting the depletion of antioxidant defense components, involving in the synthesis of collagen and enhancing the function of immune system. Besides, SGH showed a better result in protecting skin from photoaging than SG.

关键词： glutathione collagen superoxide hydroxyproline inhibiting irradiation thymus peroxidase antioxidant gelatin

Strategies for flame-retardant polymer electrolytes for safe lithiumbased batteries

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Nano Research 2024年第10期17卷 8754-8771页

作者： Xiao Ma Yang Lu Yu Ou Shuaishuai Yan Wenhui hou Pan Zhou kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

The advancement of lithium-based batteries has spurred anticipation for enhanced energy density,extended cycle life and reduced capacity ***,these benefits are accompanied by potential risks,such as thermal runaway and explosions due to higher energy ***,liquid organic electrolytes are the predominant choice for lithium batteries,despite their limitations in terms of mechanical strength and vulnerability to *** development of polymer electrolytes,with their high Young’s modulus and enhanced safety features,offers a potential solution to the drawbacks of traditional liquid *** these advantages,polymer electrolytes are still susceptible to burning and *** address this issue,researchers have conducted extensive studies to improve their flame-retardant properties from various *** review provides a concise overview of the thermal runaway mechanisms,flame-retardant mechanisms and electrochemical performance of polymer *** also outlines the advancements in flame-retardant polymer electrolytes through the incorporation of various additives and the selection of inherently flame-retardant *** review aims to offer a comprehensive understanding of flame-retardant polymer electrolytes and serve as a guide for future research in this field.

关键词： lithium batteries polymer electrolyte thermal runaway flame-retardant additives energy storage materials

Economic Scheduling of Gaseous-liquid Hydrogen Generation and Storage Plants Considering Complementarity of Multiple Products

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Journal of Modern Power Systems and Clean Energy 2023年第1期11卷 223-233页

作者： Jiamei Zhang kai Sun Canbing Li Hui Liu Wentao Huang Bin Zhou Xiaochao hou College of Electrical and Information Engineering Hunan UniversityChangsha 410082China Hunan Key Laboratory of Intelligent Information Analysis Integrated Optimization for Energy Internet Hunan UniversityChangsha 410082China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of electrical Engineering Guangxi UniversityNanning 530004China IEEE

The accessible and convenient hydrogen supply is the foundation of successful materialization for hydrogen-powered vehicles(HVs).This paper proposes a novel optimal scheduling model for gaseous-liquid hydrogen generation and storage plants powered by renewable energy to enhance the economic feasibility of *** gaseous-liquid hydrogen generation and storage plant can be regarded as an energy hub to supply concurrent service to both the transportation sector and ancillary *** the proposed model,the power to multi-state hydrogen(P2MH)process is analyzed in detail to model the branched hydrogen flow constraints and the corresponding energy conversion relationship during hydrogen generation,processing,and *** model the coupling and interaction of diverse modules in the system,the multi-energy coupling matrix is developed,which can exhibit the mapping of power from the input to the *** on this,a multi-product optimal scheduling(MPOS)algorithm considering complementarity of different hydrogen products is further formulated to optimize dispatch factors of the energy hub system to maximize the profit within limited *** demand response signals are incorporated in the algorithm to further enhance the operation revenue and the scenario-based method is deployed to consider the *** proposed methodology has been fully tested and the results demonstrate that the proposed MPOS can lead to a higher rate of return for the gaseous-liquid hydrogen generation and storage plant.

关键词： Demand response energy hub hydrogen generation and storage plant optimal scheduling renewable energy

An energy conduction model for cell image segmentation

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Chinese Science Bulletin 2011年第10期56卷 1048-1054页

作者： MA JingFeng BU JiaJun hou kai BAO ShangLian CHEN Chun College of Computer Science and Technology Zhejiang University Hangzhou 310027 China Beijing Key Laboratory of Medical Physics and Engineering Peking University Beijing 100871 China Beijing Healthway Technology Limited Company Beijing 100084 China

Cell image segmentation is an essential step in cytopathological *** their execution speed is fast,the results of cell image segmentation by conventional pixel-based,edge-based and continuity-based methods are often *** structures in a cell image can be obtained with a method that quickly adjusts the threshold ***,the processing time of such a method is usually long and the final results may be sensitive to intensity differences and other *** this article,a new energy model is proposed that synthesizes a differential equation from the conventional and level set methods,and utilizes the nonuniformity property of cell images (*** are more uneven than the background).The feasibility and robustness of the proposed model was demonstrated by processing relatively complicated background images of both simulated and real cell images.

关键词：细胞图像图像分割传导模型水平集方法能量执行速度精细结构快速调整

Proteomic analysis reveals molecular biological details in varioliform gastritis without Helicobacter pylori infection

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World Journal of Gastroenterology 2010年第29期16卷 3664-3673页

作者： Lin Zhang Yan-Hong hou kai Wu Jun-Shan Zhai Nan Lin Department of Gastroenterology The 309 Hospital of PLA Beijing 100091China

AIM:To investigate and elucidate the molecular mechanism underlying varioliform gastritis for early detection,prevention and intervention of gastric ***:A combination of two-dimensional gel electrophoresis and mass spectrometry was used to detect the differentially expressed proteins between varioliform gastritis and matched normal *** selected proteins were confirmed by Western blotting and reverse transcription polymerase chain reaction(RT-PCR) in additional samples and the function of some proteins in varioliform gastritis was analyzed by bio-method ***:We identified 21 differentially expressed proteins in varioliform gastritis,and compared them with matched normal *** proteins were upregulated and ten downregulated in varioliform gastritis when compared with the same proteins in individualmatched normal gastric *** proteins are related to metabolism,oxidation,cytoskeleton,apoptosis,signal transduction and other aspects of *** novel proteins,thioredoxin domain-containing protein 5(TXNDC5) upregulated in varioliform gastritis,and neuropolypeptide h3 [phosphatidylethanolamine-binding protein 1(PEBP1)] downregulated in varioliform gastritis,were further *** expressions were validated by Western blotting and RT-PCR in 12 cases of varioliform gastritis which was matched with normal *** expression level of PEBP1 in varioliform gastritis was significantly lower(P<0.05) while that of TXNDC5 was significantly higher than that in matched normal gastric mucosa(P<0.05).CONCLUSION:There are some changes of protein expression in varioliform *** of PEBP1 and upregulation of TXNDC5 are involved in the development of varioliform gastritis.

关键词： Differentially expressed proteins Varioliform gastritis Proteomic study Helicobacter pylori

Design and test of the plant-correcting reel for harvesting lodging garlic plants

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 59-68页

作者： Yuhua Li Chao Li Lupeng Liu kai Zhou Jialin hou College of Mechanical and Electronic Engineering Shandong Agricultural UniversityTai’an 271018ShandongChina College of Biosystems Engineering&Food Science Zhejiang UniversityHangzhou 310058China

Crops are prone to lodging with the decline of stem moisture and the intervention of other factors in the mature harvest period,such as garlic,which is difficult to harvest *** solve this problem,the plant-correcting reel for harvesting lodging garlic plants,bumped and deformed with plants many times to pull and lift them into a conveyor,is proposed in this *** analyzed the motion trajectory equation and key influencing factors of the reel and defined the lifting and plant-correcting stages as three processes of contact,stirring and *** example,the contact deformation model and system energy equations were established in the contact ***,in the stirring process,the garlic plant-correcting conditions were established through the dynamic simulation test analysis of garlic seedling trajectories and the deflection model of garlic stem was ***,in the release process,the expressions of rubber bars rotation and garlic plant offset bending curvature were constructed and the optimal number and distribution form of bars were ***,the mechanism and key operating parameters of the auxiliary lifting mechanism of the divider were *** the single-factor test,the influence of reel speed,forward speed and reel height on the success feeding rate was analyzed under different bars distribution forms;Through multi-factor experiments,the interaction contour map of various factors was *** reel speed,forward speed and reel height were 3 rad/s,3.5 m/s,and 540 mm,the feeding success rate was 98.73%.The optimization factors were tested and verified,which met the operational requirements of a high feeding success rate and low loss rate of garlic *** study combines laboratory virtual as well as field experiments and analyzes of trajectory of bars,contact deformation and deflection model of garlic plant,and reel rotation and garlic plant offset bending curvature to solve the problem of ga

关键词： feeding success rate lodging garlic harvesting reel plant model field test

Investigation of a root zone heating system for greenhouse seedling and its effects on micro-environment

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International Journal of Agricultural and Biological Engineering 2020年第6期13卷 47-52页

作者： Fen He Yong hou kai Li Xiaoming Wei Yaqing Liu Academy of Agricultural Planning and Engineering Ministry of Agriculture and Rural AffairsBeijing 100125China Key Laboratory of Farm Building in Structure and Construction Ministry of Agriculture and Rural AffairsBeijing 100125China Beijing Research Center of Intelligent Equipment for Agriculture Beijing 100097China

Under the extremely cold climatic condition,crops have to survive severe heat stress conditions,even if they are being kept in *** the winter and spring of North China,the air and soil temperature is low inside the greenhouse,and when using a traditional heating system,the energy consumption is *** paper reports on a study of different design solutions for a root zone heating system based on a kind of low temperature radiation *** zone heating systems offer increasing crop quality and productivity.A novel type of heat preservation and root zone heating system was applied in greenhouse *** through multiple experiments,the effect of the root zone heating system on the ambient environment and seedbed surface was studied,and the heat preservation effect and heating uniformity were *** show that single-layer film covering on the root zone heating system can make the average temperature at night increase 1°*** the average seedbed surface and substrate temperature can increase 11.3°C and 5.2°C,*** conclusion,the root zone heating system can effectively improve the environmental temperature of seedling and the uniformity of heating is high,which provides a strong guarantee for high-quality seedling cultivation.

关键词： greenhouse root zone heating system micro-environment seedling substrate temperature air temperature

Unitary Transformation in kq Representation

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Communications in Theoretical Physics 2009年第7期52卷 103-107页

作者： YANG Zhan-Ying ZHANG kai hou Bo-Yu SHI Kang-Jie Department of Physics Northwest University Xi＇an 710069 China Institute of Modern Physics Northwest University Xi＇an 710069 China

In this paper,we discuss the unitary transformation induced by Z_6 rotations of noncommutative space onthe states |k,q,s〉,which plays a key role in construction for noncommutative solitons T^2/Z_6 by GHS *** aresult,... 详细信息

关键词： unitary transformation kq representation

A novel non-iterative shape method for estimating the decay time constant of the finger photoplethysmographic pulse

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第6期12卷 438-445页

作者： Ling-xiao hou Ming WEI Xuan WANG Xin-zhong CHEN Ying FENG kai JIANG Key Laboratory of Biomedical Engineering of Ministry of Education Department of Biomedical Engineering Zhejiang University'Hangzhou 310027 China Department of Anaesthesia Women "s Hospital Hangzhou 310006 China Institute of Space Medical Engineering Beijing 100094 China

The photoplethysmogram(PPG) of a pulse wave,similar in appearance to the arterial blood pressure(ABP) waveform,contains rich information about the cardiovascular *** decay time constant RC,equal to the product of peripheral resistance R and total arterial compliance C,is a meaningful cardiovascular model parameter in vascular *** or ameliorating the existing ABP methods does not achieve a satisfactory estimation of RC from the PPG volume pulse(VRC).Thus,a novel non-iterative shape method(NSM) of evaluating VRC is introduced in this *** mathematic expression between a novel,readily available morphological parameter called the area difference ratio(ADR) and VRC was *** it was difficult to calculate VRC from the complicated expression analytically,we recommend estimating it using a piecewise linear interpolation ***,since the effect of the PPG magnitude is eliminated in the calculation of ADR,precaliberation or normalization is dispensable in the *** of human experiments indicated that the NSM was computationally efficient,and the simulation experiments confirmed that the NSM was theoretically available for ABP.

关键词： Photoplethysmogram(PPG) Decay time constant Non-iterative shape method(NSM) Area difference ratio(ADR)

Lamellar morphology of directional solidified Ti–45Al–6Nb–xW alloys

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Rare Metals 2016年第1期35卷 65-69页

作者： Zhi-Yuan hou Yong-Sheng Li Hao-Jie Mei kai Hu Guang Chen School of Materials Science and Engineering Nanjing University of Science and Technology Engineering Research Center of Materials Behavior and Design Ministry of Education

Directional solidification of Ti-45Al-6Nb-xW（x=0,0.4,0.8;at%） alloys was performed by Bridgeman method with the stable growth rate of 5,10,and 20 μm·s^（-1）.The differential scanning calorimeter（DSC） results indicate that both the eutectic temperature and the transition temperature of α（Ti_3Al） to γ（TiAl） increase with W content increasing from 0 at%to 0.8 at%.For the stable growth rate of 10 μm·s^（-1）,the orientations of α_2（Ti_3Al）/γ（TiAl）lamellae change from 45°（0 at%W） to 0° and near 0°（0.4at%and 0.8 at%W） to the crystal growth direction,and the spacing of α_2/γ lamellae decreases with W content increasing from 0 at%to 0.4 at%,while it increases when W content is 0.8 at%.With the increase in growth rate from5 to 10 and 20 μm·s^（-1）,the lamellar spacing of α_2/γbecomes smaller,and the lamellar thickness becomes more uniform.

关键词： Ti-Al-Nb--W alloy Directionalsolidification Lamellar morphology Lamellar spacing