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14th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Xu, Xiaokang Yang, Yi Wang, Jiangfeng Lou, Juwei Chen, Liangqi State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University Xi'an China Laboratory of Science and Technology on Integrated Logistics Support College of Intelligence Science and Technology National University of Defense Technology Changsha China

ISBN: (纸本)9798350301359

The rotor system plays a very important role in supercritical carbon dioxide Brayton cycle system, and its dynamic problem will directly affect the motion stability and safety of the whole unit. In this paper, the rotor dynamic model of supercritical CO2 coaxial unit is established by finite element method, and the critical speed, modal shape and unbalance response of the rotor are studied. The first seven critical speed of the rotor and the first seven natural frequency of the rotor at the working speed are calculated. The bending modal of the rotor and the position where the rotor amplitude is the largest are analyzed, which can provide reference for the optimization design of the rotor stability. The influences of mass unbalances at the operational speed of rotor are analyzed. The research can provide some suggestions for the optimal design and actual operation of the supercritical CO2 coaxial integrated unit. © 2023 IEEE.

关键词： critical speed unbalance response vibration analysis

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Rhizoma paridis saponins protected against liver injury in diethylnitrosamine-induced mice

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Traditional Medicine Research 2023年第2期8卷 7-12页

作者： Chen Luo Jing-Wen Yao Shu-Li Man Wen-Yuan Gao Key Laboratory of Industrial Microbiology Ministry of Education/Tianjin Key Laboratory of Industry Microbiology/National and Local United Engineering Lab of Metabolic Control Fermentation Technology/College of BiotechnologyTianjin University of Science&TechnologyTianjin 300457China Tianjin Key Laboratory for Modern Drug Delivery and High Efficiency School of Pharmaceutical Science and TechnologyTianjin UniversityTianjin 300072China

Background:Diethylnitrosamine,one of food additives,possessed a strong carcinogenic effect in *** paridis saponins,as the main active components of Paris polyphylla,have a good anti-cancer effect in our previous *** verify their inhibitory effect on diethylnitrosamine-induced liver cancer,we carried out this ***:We established diethylnitrosamine-induced mouse hepatocarcinoma models to evaluate antitumor of Rhizoma paridis ***,gas chromatography-mass spectrometry was applied to analyze the metabolites in the urine and serum ***:Rhizoma paridis saponins alleviated diethylnitrosamine-induced *** the one hand,Rhizoma paridis saponins down-regulated the levels of liver function markers,such as alanine aminotransferase,aspartate transaminase and alpha *** the other hand,Rhizoma paridis saponins reduced metabolic disorders by increasing fructose and mannose metabolism,and decreasing pentose and glucuronate interconversion,inositol phosphate metabolism,and the process of saturated fatty acids transforming to unsaturated fatty acids,which based on the regulating mRNA expression of glucose transporter type 4,lactate dehydrogenase A,fatty acid synthetas,acetyl-CoA carboxylase and apolipoprotein ***:Rhizoma paridis saponins has the potential application to inhibit chemical-induced hepatocarcinogenesis in the future.

关键词： Rhizoma paridis saponins liver injury diethylnitrosamine metabolites

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Semi-custom methodology to fabricate transmission electron microscopy chip for in situ characterization of nanodevices and nanomaterials

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science China(Technological sciences) 2022年第4期65卷 817-825页

作者： YU BoCheng SUN Mei PAN RuHao TIAN JiaMin ZHENG FengYi HUANG Dong LYU FengJiao ZHANG ZhiTong LI JunJie CHEN Qing LI ZhiHong National Key Laboratory of Nano/Micro Fabrication Technology School of Integrated CircuitsPeking UniversityBeijing 100871China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory for Physics and Chemistry of Nanodevices and Department of Electronics Peking UniversityBeijing 100871China

The fabrication of nanodevices on the delicate membrane window of the TEM(transmission electron microscopy)chip has the risk of breakage failure,limiting in-depth research in this *** work proposed a methodology to address this issue,enabling secure in-situ transmission electron microscopic observation of many devices and materials that would otherwise be difficult to *** semi-custom TEM chip design and front-side protected release technology,a variety of nanodevices were successfully fabricated onto the window membrane of the TEM chip and studied in ***,the pressure tolerance of window membrane was investigated and enhanced with a reinforcing *** an example of typical applications,MoS;devices on the TEM chip have been fabricated and electron beam-induced gate modulation and irradiation damage effects,have been demonstrated.

关键词： in situ TEM TEM chip nanodevice membrane window nanomaterial

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Effect of microstructure on lipolysis behavior of milk fat globules during gastrointestinal digestion

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Food science and Human Wellness 2025年第5期 1947-1957页

作者： Xinyun Zhou Ting Guo Chen Chen Hadiatullah Hadiatullah Yunping Yao Changmo Li Xingguo Wang State Key Laboratory of Food Nutrition and Safety Key Laboratory of Food Nutrition and Safety Ministry of Education College of Food Science and Engineering Tianjin University of Science & Technology Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency Collaborative Innovation Center of Chemical Science and Engineering School of Pharmaceutical Science and Technology Tianjin University Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province National Engineering Research Center for Functional Food School of Food Science and Technology Jiangnan University

Milk fat globules(MFG) are the primary source of energy and functional factor in dairy-based *** evaluate the suitability of commercial MFG substitutes for infant and adult consumers,the lipolysis properties and regulatory factors in digesting bovine,caprine,and human MFG were *** lipolysis kinetic models of bovine and caprine MFG are comparable,with bovine MFG displaying the highest degree of lipolysis(50.21%) during gastric digestion in infants,resulting in the production short-chain saturated fatty *** MFG has a high rate of lipolysis due to its weak phospholipid-glycoprotein layer,which is prominent in both infants' and adults' *** effects of consuming bovine and caprine MFG for adults are comparable in terms of lipolysis properties and nutritional value of fatty *** gastrointestinal digestion,human MFG has the highest digestibility(93.98%).The advantages of human MFG include its phospholipid structure,exogenous lipase,and lipolysis-regulating *** study provides recommendation for the selection of milk fat substitutes and improvements in commercial dairy.

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Balancing the piezoelectric coefficient and carrier concentration of Bi_(2)WO_(6−x) for ultrahigh piezocatalysis

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Journal of Advanced Ceramics 2024年第11期13卷 1737-1747页

作者： Ying Wang Xiaoli Xu Lingbo Xiao Lutao Li Qiuhua Xu Zhenhai Wen Laishun Qin Yanmin Jia Dong-Liang Peng Wanping Chen Da Chen College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China Key Laboratory of Jiangxi Province for Persistent Pollutants Control National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization and Resources RecycleNanchang Hangkong UniversityNanchang 330063China Department of Physics Zhejiang University of Science and TechnologyHangzhou 310008China Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics Southeast UniversityNanjing 211189China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province College of EnergySoochow UniversitySuzhou 215006China State Key Laboratory of Structural Chemistry and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen EnergyFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710121China State Key Laboratory of Physical Chemistry of Solid Surface Fujian Key Laboratory of Surface and Interface Engineering for High Performance MaterialsCollege of MaterialsXiamen UniversityXiamen 361005China School of Physics and Technology Wuhan UniversityWuhan 430072China

Balancing the piezoelectric coefficient and carrier concentration of materials is key in the field of *** this work,Bi_(2)WO_(6) material with both piezoelectric and semiconductor properties was chosen as a model material.A one-step ethylene glycol(EG)-assisted solvothermal method was used to synthesize Bi2WO6 with oxygen *** controlling the solvothermal time and temperature,the oxygen vacancy concentration(COV)was *** COV increases,the piezoelectric coefficient decreases,the carrier concentration increases,and the hydrogen production rate first increases but then *** COV reaches 1.45×10^(12) spins·mg^(−1),the corresponding piezoelectric coefficient and carrier concentration are 13.9 pm·V^(−1) and 2.90×10^(20) cm^(−3),*** optimal hydrogen production rate per power of 2.21μmol·g^(−1)·h^(−1)·W^(−1) is equivalent to or even better than that of most reported *** piezoelectric coefficient and carrier concentration,as two factors,jointly determine the piezocatalytic *** findings of this research can provide important and deep-seated insights for better piezocatalysts in the future.

关键词： piezocatalysis oxygen vacancy carrier concentration piezoelectric coefficient hydrogen evolution

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Mechanical and electrical properties of two-dimensional BN doped with carbon group elements: first-principles calculations

Mechanical and electrical properties of two-dimensional BN d...

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2024 International Conference on Materials Physics and Composites, ICMPC 2024

作者： Liu, Heng Xing, Mengjiang Fan, Qingyang School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China College of Information and Control Engineering Xi’an University of Architecture and Technology Shaanxi Xi’an710055 China

Research of low-dimensional nanomaterials provides a direction for solving the problems of energy and environmental pollution. In this work, the regulation mechanism of doping carbon group elements X (X = C, Si, Ge, Pb, Sn) on mechanical and electrical properties of 2D monolayer BN are investigated by first-principles calculations. Two doping sites were selected, replace B atoms (B15N16X) or N atoms (B16N15X). Lower relative enthalpies and the elastic constants, which conforming to the mechanical stability standard, fully prove the stability of the doping system. Compared with B15N16X, B16N15X has larger structural distortion, smaller elastic constants and modulus, and is more inclined to ductility. With the increase of atomic radius, the deformation degree increases and the elastic parameters decrease. C-doped by replacing B atoms improves the elastic mechanical properties of monolayer BN. Sn-doped and Pb-doped modulate the monolayer BN into ductility. More importantly, all doped configurations exhibit magnetism. The indirect band gap of the undoped system can also be modulated into a direct band gap, B15N16C, B16N15Si and B16N15Ge all have direct band gaps in the spin-down direction. Asymmetric impurity energy levels DOS further verify the magnetism of the reference system. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Monolayers

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Punicalagin alleviates hypercholesterolemia in mice through modulating farnesoid X receptor signaling and modulating gut microbiota

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Food science and Human Wellness 2025年第1期14卷 175-189页

作者： Huanhuan Liu Hongli Liu Chunhong Yan Jiaxiu Liu Yu Cao Guopeng Li Xiaodong Xia State Key Laboratory of Marine Food Processing and Safety Control National Engineering Research Center of SeafoodSchool of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China Beijing Advanced Innovation Center for Food Nutrition and Human Health College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

Punicalagin has been demonstrated to exhibit anti-oxidant and anti-inflammatory properties,but whether and how it could impact hypercholesterolemia remains not fully *** aim of this study was to investigate the influence of punicalagin on hypercholesterolemia in mice and its related *** 6 weeks'intervention,punicalagin significantly reduced serum total cholesterol and low-density lipoprotein cholesterol(LDL-C)levels in mice fed a high-fat high-cholesterol(HFHC)***,punicalagin supplementation lowered hepatic cholesterol level,which corresponded to the down-regulation of cholesterol synthesis genes(Fdps,Cyp51)and up-regulated bile acid synthesis genes(Cyp7a1,Cyp27a1).In addition,bile acid reabsorption was retarded in punicalagin-fed mice through down-regulating ileal apical sodium-dependent BA transporter(ASBT).Furthermore,intestinal farnesoid X receptor(FXR)-fibroblast growth factor 15(Fgf15)pathway was inhibited while hepatic FXR-small heterodimeric partner(SHP)pathway was activated in punicalagin *** analysis and targeted metabolomics showed that punicalagin decreased the abundance of bile-salt hydrolase(BSH)-producing bacteria(Clostridiaceae and Bifidobacteriaceae)and the ratio of primary BAs to secondary *** conclusion,the cholesterol-lowering effect of punicalagin partly through down-regulating cholesterol synthesis and increasing cholesterol catabolism,which could be achieved by regulating gut microbiota,altering bile acid composition and modulating FXR signaling *** findings indicate the potential application of punicalagin-related products as an alternative strategy for hypercholesterolemia prevention and mitigation.

关键词： Punicalagin Hypercholesterolemia Farnesoid X receptor Bile acid metabolism Gut microbiota

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A Neural Approach Towards Real-time Management for integrated Energy System Incorporating Carbon Trading and Electrical Vehicle Scheduling 4th

A Neural Approach Towards Real-time Management for Integrat...

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Proceedings of the 4th International Conference on Neural Computing for Advanced Applications, NCAA 2023

作者： Li, Yiying Wang, Bo Zhang, Lijun Liu, Lei Fan, Huijin School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan430074 China National Key Laboratory of Science and Technology on Multispectral Information Processing Huazhong University of Science and Technology Wuhan430074 China Belt and Road Joint Laboratory on Measurement and Control Technology Huazhong University of Science and Technology Wuhan430074 China

ISBN: (纸本)9789819958467

This paper proposes a real-time integrated energy system (IES) management approach which aims at promoting overall energy efficiency, increasing renewable energy penetration, and smoothing load fluctuation. The electric vehicles (EVs) charging scheduling is incorporated into the IES management, where the uncertain arrivals and departures of multiple EVs are considered as a stochastic but flexible load to the IES. Furthermore, towards the carbon neutralization target, a carbon emissions trading mechanism is introduced into the IES management to incentivize the system to operate in an eco-friendlier manner. To tackle the computational complexity induced by the stochastic and intermittent nature of the renewable energy sources and EVs load, the scheduling of the IES is realized in a neural network based real-time manner, driven by a deep reinforcement learning approach that guarantees safe training and operation. The case study verifies the effectiveness of the proposed approach. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Reinforcement learning

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Time Delay Estimation Method for X-ray Pulsars Based on The Optimal Number of Bispectral Feature Points 3

Time Delay Estimation Method for X-ray Pulsars Based on The ...

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3rd IEEE International Conference on Computer Communication and Artificial Intelligence, CCAI 2023

作者： Huang, Zhiwei Zong, Hua Xie, Yujia Xu, Nuoqi Beijing Aerospace Automatic Control Institute National Key Laboratory of Science and Technology on Aerospace Intelligent Control Beijing China Beijing Electronic Technology Vocational College School of Economics and Management Beijing China

ISBN: (纸本)9798350335262

To enhance the accuracy and efficiency of X-ray pulsars time delay estimation, a novel time delay estimation method for X-ray pulsars based on the optimal number of bispectral feature points is proposed. The approach establishes the relationship between the time delay estimation error and the number of bispectral feature points used under different signalto-noise ratios, and gives a method to determine the optimal number of bispectral feature points involved in the estimation. We conduct simulation experiments for HXMT-Insight satellite observations of the Crab pulsar on Matlab R2017b. Results indicate that the average running time of the proposed algorithm is 50ms and the average error during observation intervals below 50s is 99. 0083us. Compared to the traditional bispectrum method, the proposed algorithm exhibits slightly higher accuracy and significantly improved running time. © 2023 IEEE.

关键词： Timing circuits

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Loading Effects of the Human Body on An Ultrawideband Wearable Textile Antenna 12

Loading Effects of the Human Body on An Ultrawideband Wearab...

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12th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2024

作者： Xu, Ziang Gao, Xiang Mao, Zhuzhang Tang, Wenfei Guo, Kun Beijing Institute of Technology School of Cyberspace Science and Technology Beijing100081 China National Key Laboratory of Science and Technology on Space-Born Intelligent Information Processing Beijing100081 China Beijing Institute of Technology School of Integrated Circuits and Electronics Beijing100081 China Beijing Institute of Technology School of Information and Electronics Beijing100081 China

ISBN: (纸本)9798350351019

This paper presents an ultrawideband wearable textile antenna for emergency communication applications, and investigates the loading effects of the human body on radiation performance of the antenna. The proposed antenna has a measured operating bandwidth from 0.31 to 1.2 GHz and an average realized gain of 3.32 dBi in free space. Furthermore, the results show that the antenna gain can effectively be improved by properly adjusting the distance between the human body and the antenna. © 2024 IEEE.

关键词： Wearable antennas

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