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Advances in Atmospheric Sciences 2020年第7期37卷 735-750页

作者： peipei yu Chunxiang SHI Ling YANG Shuai SHAN College of Electronic Engineering Chengdu University of Information TechnologyChengdu 610225China CMA Key Laboratory of Atmospheric Sounding Chengdu 610225China National Meteorological Information Center Beijing 100081China College of Geographic Sciences Nanjing University of Information Science and TechnologyNanjing 210044China

Hyperspectral data have important research and application value in the fields of meteorology and remote *** the goal of improving retrievals of atmospheric temperature profiles,this paper outlines a novel temperature channel selection method based on singular spectrum analysis(SSA)for the Geostationary Interferometric Infrared Sounder(GIIRS),which is the first infrared sounder operating in geostationary *** method possesses not only the simplicity and rapidity of the principal component analysis method,but also the interpretability of the conventional channel selection *** novel SSA method is used to decompose the GIIRS observed infrared brightness temperature spectrum(700-1130 cm-1),and the reconstructed grouped components can be obtained to reflect the energy variations in the temperature-sensitive waveband of the respective *** 700-780 cm-1,the channels selected using our method perform better than IASI(Infrared Atmospheric Sounding Interferometer)and Cr IS(Cross-track Infrared Sounder)temperature channels when used as inputs to the neural network retrieval model.

关键词： meteorology Infrared spectrum

Analysis of pesticide residues in commercially available chenpi using a modified QuEChERS method and GC-MS/MS determination

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Journal of Pharmaceutical Analysis 2020年第1期10卷 60-69页

作者： Shuang Li peipei yu Ceng Zhou Ling Tong Dongxiang Li Zhiguo yu yunli Zhao School of Pharmacy Shenyang Pharmaceutical UniversityShenyang110016China Baoding No.1 Central Hospital BaodingHebei Province 071000China State Key Laboratory of Core Technology in Innovative Chinese Medicine Tasly Pharmaceutical Analysis InstituteTasly AcademyTianjin 300402China

To ensure the safety of the commercially available chenpi,a convenient and fast analytical method was developed for the determination of 133 pesticide residues in chenpi using gas chromatography-tandem mass spectrometry(GC-MS/MS).In this study,different extraction solvents,redissolution solvents and adsorbents were tested according to the recovery and purification effect to obtain a modified QuEChERS *** samples were extracted with *** the clean-up step,octadecyl-modified silica(C18)and graphitized carbon black(GCB)were selected,and aminopropyl(NH2)was used instead of primary secondary amine(PSA)because of its weaker ion exchange capacity which had little effect on the recovery of *** were quantified by matrix-matched calibration with internal *** pesticides showed good linearity in the respective range,both with values of r2>*** average recoveries of the pesticides spiked samples ranged from 70.0% to 112.2% with the RSDs of 0.2%–14.4%.The modified QuEChERS method was validated and applied to twenty real *** pesticides were found in eight batches,but no pesticide exceeded the maximum residue limits(MRL,MRL reference to European commission).

关键词： Pesticide residues Chenpi GC-MS/MS QuEChERS

Preparation and Performance of Chitosan/Citric Acid Modified Magnesium Oxychloride Cement

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1326-1334页

作者： SONG Zijian LIU Lang yu peipei ZHANG yunsheng LI Xincheng CHU Hongqiang JIANG Linhua College of Mechanics and Materials Hohai UniversityNanjing 2100China School of Civil Engineering Lanzhou University of TechnologyLanzhou 730050China yunnan Institute of Building Research Co. LtdKunming 650223China

Citric acid(CA)and chitosan(CS)were employed to modify magnesium oxychloride cement(MOC).Multiscale measurements were implemented to study the properties of the modified MOC *** show that the addition of CA/CS significantly changes the content of each phase and the microstructure of phase *** single addition of CA can effectively increase the compressive strength of MOC after 7 d curing,while CS exerts no obvious effect on the compressive *** to the simultaneous addition of CA and CS,the compressive strength of MOC gradually decreases with the increasing content of ***,mixing CA and CS significantly enhances the water resistance of MOC and decreases the degradation rate of MOC in phosphate buffered solution,which can be ascribed to the low specific surface area of the plate-like crystals in the modified MOC and the reduction of pores in the structure.

关键词： magnesium oxychloride cement modifier citric acid chitosan

Non-enzymatic browning path analysis of ready-to-eat crayfish(Promcambarus clarkii)tails during thermal treatment and storage

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Food Bioscience 2023年第1期51卷 1100-1108页

作者： Qixing Jiang Huimin Shen Pei Gao peipei yu Fang Yang Yanshun Xu Dawei yu Wenshui Xia Lishi Wang State Key Laboratory of Food Science and Technology School of Food Science and TechnologyJiangnan UniversityWuxiJiangsu214122China Collaborative Innovation Center of Food Safety and Quality Control of Jiangsu Province Jiangnan UniversityWuxiJiangsu214122China

This study was carried out to reveal the browning path of ready-to-eat(RTE)crayfish tails during thermal treatment and storage using path *** reactions,lipid oxidation,and phenol oxidation were evaluated in combination with free radical content and FTIR analysis,and direct path coefficients as well as determination coefficients were obtained based on these parameters,such as the absorbance at 294 nm(A294),5-hydroxymethylfurfural(5-HMF),thiobarbituric acid-reactive substances(TBARS),and total phenols(TP).The result showed that the browning of seasoned RTE crayfish tails was ascribe to the synergistic effect of Maillard reaction and lipid oxidation by the order of determination *** the crayfish hepatopancreas were removed,the content of A294,5-HMF,TBARS,and TP declined more than 30%,specifically affecting the direct pathway from lipid oxidation to Maillard reaction and alleviating the ***,no significant change of color was observed in the group without thirteen-spices,while TBARS and free radical content increased by at least 16.7%.The removal of hepatopancreas and the control of Maillard reaction were deemed to be a good measure for inhibiting the non-enzymatic browning of RTE crayfish tails.

关键词： RTE crayfish Tails Non-enzymatic browning Path analysis Maillard reaction Lipid oxidation

Effect of proteins,polysaccharides,and particle sizes on sludge dewaterability

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Journal of Environmental Sciences 2009年第1期21卷 83-88页

作者： SHAO Liming,HE peipei,yu Guanghui,HE Pinjing State Key Laboratory of Pollution Control and Resources Reuse,Key Laboratory of Yangtze River Water Environment,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China. E-mail: solidwaste@***

Four batch experiments of hydrolysis and acidification were carried out to investigate the distributions of proteins （PN） and polysaccharides （PS） in the sludge, the PN/PS ratio, the particle sizes, and their relationship with sludge dewaterability （as determined by capillary suction time, CST）. The sludge flocs were stratified through centrifugation- and ultrasound-based method into four fractions：（1） slime, （2） loosely bound extracellular polymeric substances （LB-EPS）, （3） tightly bound EPS （TB-EPS）, and （4） pellet. The results showed that PN was mainly partitioned in the pellet （80.7%） and TB-EPS （9.6%） fractions, while PS distributed evenly in the four fractions. During hydrolysis and acidification, PN was transferred from the pellet and TB-EPS fractions to the slime fraction, but PS had no significant transfer trends. The mean particle sizes of the sludge flocs decreased with hydrolysis and acidification. The pH had a more significant influence on the dewaterability of sludge flocs than temperature. Sludge dewaterability during hydrolysis and acidification processes greatly deteriorated from 9.7 s at raw sludge to 340-450 s under alkaline conditions. However, it was just slightly increased under acidic conditions. Further investigation suggested that CST was affected by soluble PN, soluble PN/PS, and particle sizes of sludge flocs, but was affected slightly by total PN, PS, or PN/PS in the whole sludge flocs and other fractions （except slime）.

关键词： dewaterability extracellular polymeric substances particle size polysaccharides proteins sewage sludge

A validated reversed phase HPLC method for determination of process-related impurities in DHDK-loaded mPEG-PLA micelles

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Asian Journal of Traditional Medicines 2019年第2期14卷 82-91页

作者： peipei yu Jing Hong Ceng Zhou Jingtao Zhao Lin Meng Zhiguo yu yunli Zhao School of Pharmacy Shenyang Pharmaceutical University Shenyang 110016 China School of Environment and Chemical Engineering Shenyang Ligong University Shenyang 110168 China

A new compound named DHDK was isolated from Viscum coloratum and identified as (1E,4E)-1,7-bis(4-hydroxyphenyl)hepta -1,4-dien-3-one. DHDK, a new potential anti-tumor drug, was synthesized and prepared poly(ethylene glycol)-poly(D.L-lactic acid)(mPEG-PLA) micelles due to cytotoxic effects on a range of cancer cells. A revered phase liquid chromatographyic method has been developed and validated for the determination of potential related impurities in DHDK-loaded mPEG-PLA micelles. The micelles was subjected to the stress conditions of acid, base, oxidation, thermal and photolysis. The determination was achieved on Phenomenex SynergiTM 4 μm Fusion-RP 80?(250 mm × 4.6 mm, 4 μm) with a gradient elution and the detection wavelength was set at 220 nm. Regression analysis shows as r value (correlation coefficient) of greater than 0.999 for DHDK and six potential impurities. Recoveries of impurities were found between 90.0% and 108.0%. The developed RP-LC method was validated with respect to linearity, accuracy, precision and robustness, which can be used for determination of related impurities in DHDK-loaded mPEG-PLA micelles.

关键词： DHDK mPEG-PLA RP-LC process-related impurities validation

实时电价机制下基于复合两端采样强化学习的区域供冷系统需求响应运行控制

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中国科学：技术科学 2023年第10期53卷 1699-1712页

作者：宋永华余佩佩张洪财澳门大学智慧城市物联网国家重点实验室中国澳门999078

为推动电力系统实现碳中和,我国近年来风、光等新能源发电装机规模不断增加.由于风、光等新能源具有强间歇性和高度不确定性,电力系统供需实时平衡的难度不断增大.通过分时电价或实时电价政策,引导需求侧灵活负荷与新能源发电协同(即需... 详细信息

为推动电力系统实现碳中和,我国近年来风、光等新能源发电装机规模不断增加.由于风、光等新能源具有强间歇性和高度不确定性,电力系统供需实时平衡的难度不断增大.通过分时电价或实时电价政策,引导需求侧灵活负荷与新能源发电协同(即需求响应)是未来保证高比例新能源有效消纳的重要技术路径.空调负荷是城市用电负荷占比最高的单一类型负荷之一(在我国部分城市夏季高峰负荷中占比超过50%),且可利用建筑热惯性提供较好的调控能力,是近年来需求响应领域研究的热点.针对未来电力市场实时电价机制场景,本文研究大型区域供冷系统中的冰蓄冷需求响应优化控制技术,提出了基于复合两端采样机制的强化学习方法,实现对冰蓄冷系统的优化调度与控制,可以有效应对来自用户用冷需求和市场实时电价的双重不确定性.首先,针对实时电价下区域供冷系统运行控制问题的特性,构建马尔可夫决策过程.其次,采用非模型的强化学习算法对马尔可夫决策过程进行求解,并针对传统强化学习算法中均匀随机采样导致的学习效率低下的问题,利用结合立即回报和时序误差的复合两端采样机制,提高控制器的训练效率和收敛性能.最后,基于真实系统仿真模型开展实验,验证了本文所提需求响应优化控制方法的有效性.

关键词：需求响应控制区域供冷系统冰蓄冷实时电价强化学习复合两端采样机制

Swinging-up and stabilization of the inverted pendulum by energy well and SDRE control

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Swinging-up and stabilization of the inverted pendulum by en...

2009中国控制与决策会议

作者： Cheng Huifeng,Li Hongxing,yu peipei School of Electronic and Information Engineering,Dalian University of Technology,Dalian 116024

＜正＞In this paper,we study the swinging-up and stabilization problem of the single inverted *** concept of energy well function is introduced in order to restrict the displacement and velocity of the cart,which prevents the cart from going outside the limited *** is carried out using the State-Dependent Riccati Equation （SDRE） *** greatest advantage offered by SDRE is the design *** proposed scheme has worked well in simulation for the swinging-up and stabilization of the single inverted pendulum.

关键词： Inverted pendulum Energy control Potential well SDRE

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房柱法矿柱合理尺寸设计及矿块结构参数优选

中南大学学报（自然科学版） 2014年第11期45卷 3943-3948页

作者：赵国彦周礼李金跃余佩佩中南大学资源与安全工程学院湖南长沙410083 长沙矿山研究院有限责任公司湖南长沙410083 国家金属采矿工程技术研究中心湖南长沙410083

为科学设计矿柱,分析矿柱的承载机理,指出矿柱承受的荷载为顶板围岩塑性区内岩体的自身重力。针对矿柱尺寸过大的问题,运用普氏理论并考虑埋深的影响,推导出新的矿柱尺寸计算公式。结合某磷矿工程实例,计算得到2种不同的矿柱尺寸,并得... 详细信息

为科学设计矿柱,分析矿柱的承载机理,指出矿柱承受的荷载为顶板围岩塑性区内岩体的自身重力。针对矿柱尺寸过大的问题,运用普氏理论并考虑埋深的影响,推导出新的矿柱尺寸计算公式。结合某磷矿工程实例,计算得到2种不同的矿柱尺寸,并得到对应的2种矿块结构参数方案:方案A中矿柱长×宽为3.00 m×3.00 m,矿房跨度为12.75 m;方案B中矿柱长×宽为2.50 m×2.50 m,矿房跨度为10.00 m。采用数值模拟方法对包括原设计方案在内的3个方案进行优选,最终确定方案A为最优方案,矿石损失率由5.0%下降到1.8%,具有显著的经济意义。

关键词：采矿工程房柱法矿柱结构参数

Development and Quality Analysis of Protein Enriched Instant Soup Mix

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Food and Nutrition Sciences 2018年第6期9卷 663-675页

作者： Monirul Islam Md Nazirul Islam Sarker Md Shahidul Islam Adhita Sri Prabakusuma Niaz Mahmud Yang Fang peipei yu Wenshui Xia State Key Laboratory of Food Science and Technology School of Food Science and Technology Jiangnan University Wuxi China Rural Development Academy Bogra Bangladesh School of Public Administration Sichuan University Chengdu China Department of Plant Pathology Yunnan Agricultural University Yunnan China Department of Food Technology Universitas Ahmad Dahlan Yogyakarta Indonesia Department of Nutrition and Food Technology Jessore University of Science and Technology Jessore Bangladesh

The aim of the study was to develop protein enriched instant fish soup mix and analysis of the quality of various conditions. The study used a mechanical dryer for maintaining a constant air flow and temperature at its drying and dehydration stage. Powder was made after drying. An appropriate composition was used as an indicator. Various compositions like 75%, 65%, 55% and 45% fish powder were used as formulation 0, formulation 1, formulation 2, and formulation 3 respectively. Then these were reconstituted by boiled water for soup mix preparation. The result indicated that mixer 2 was the best composition. The finding suggested that 55% fish powder mix is the best composition for protein enriched instant soup mix. It will help to produce the instant soup mix and an alternative source of various costly animal and plant protein as a value-added material.

关键词： Instant Soup Fish Powder Value Addition Vegetable Powder Fish Soup