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不同干燥温度对蝉花孢梗束品质的影响

阜阳师范学院学报（自然科学版） 2018年第4期35卷 43-48页

作者：于士军万国平何玲艳李向东王伟滁州学院生物与食品工程学院食品检验检测中心安徽滁州239000 宣城市农产品质量安全监管局安徽宣城242000

本文研究了不同干燥温度,即50℃、80℃、105℃热风干燥和室温自然干燥对蝉花孢梗束粉的外观、营养成分、功能成分和蛋白质营养价值的影响。运用聚类分析对不同方式干燥得到的蝉花孢梗束数据进行综合分析。结果表明80℃干燥蝉花孢梗束颜... 详细信息

本文研究了不同干燥温度,即50℃、80℃、105℃热风干燥和室温自然干燥对蝉花孢梗束粉的外观、营养成分、功能成分和蛋白质营养价值的影响。运用聚类分析对不同方式干燥得到的蝉花孢梗束数据进行综合分析。结果表明80℃干燥蝉花孢梗束颜色呈现亮黄色,其次是50℃干燥蝉花孢梗束为黄色,自然干燥蝉花孢梗束为淡黄色,105℃干燥蝉花孢梗束为黄略带红色;自然干燥蝉花孢梗束中总氨基酸、必需氨基酸、天冬氨酸、苏氨酸、甘氨酸、半胱氨酸、甲硫氨酸、异亮氨酸、组氨酸和精氨酸含量较高,50℃干燥的蝉花孢梗束含有较高的甘露醇、蛋白质、脂肪、丝氨酸、丙谷氨酸、半胱氨酸、亮氨酸和苯丙氨酸,80℃干燥的蝉花孢梗束含有较高的总糖、麦角甾醇、氨酸、酪氨酸、赖氨酸和脯氨酸,105℃干燥的蝉花孢梗束含有较高的腺苷和灰分;随着干燥温度升高蝉花孢梗束蛋白质营养价值呈现降低的变化。

关键词：蝉花孢梗束干燥营养成分聚类分析

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不同干燥方式对培养蝉花孢梗束品质的影响

基因组学与应用生物学 2020年第6期39卷 2712-2721页

作者：于士军何玲艳万国平王伟李向东吴宗庆曾婷婷王维坤滁州学院生物与食品工程学院食品检验检测中心滁州239000 宣城市农产品质量安全监管局宣城242000 通用生物系统(安徽)有限公司滁州239000

本研究为探究不同干燥方式对蝉花孢梗束品质的影响和为生产中蝉花孢梗束选择合适的干燥方式提供理论依据,研究了自然干燥、热风干燥、微波干燥、热泵干燥和冷冻干燥对蝉花孢梗束粉的外观、粒度、主要营养和功能成分的影响。运用主成分... 详细信息

本研究为探究不同干燥方式对蝉花孢梗束品质的影响和为生产中蝉花孢梗束选择合适的干燥方式提供理论依据,研究了自然干燥、热风干燥、微波干燥、热泵干燥和冷冻干燥对蝉花孢梗束粉的外观、粒度、主要营养和功能成分的影响。运用主成分和聚类分析对不同干燥处理得到的样品的数据进行综合分析。研究表明热泵干燥能最好地保持样品的亮黄色色泽,蓝黄度b*为36.74,显著高于其他方式干燥样品,其次是微波干燥;但是这两种方式干燥的蝉花孢梗束总氨基酸和必需氨基酸含量均较低。自然干燥和冷冻干燥的样品感观较差,蓝黄度b*均小于28且二者差异不显著。热风干燥样品色泽仅次于微波干燥,含有较高蛋白质、总氨基酸和总糖,且其脂肪、麦角甾醇和甘露醇的含量最高,分别为4.15 g/100 g、8.65 mg/g和59.20 mg/g。总体考虑,热风干燥能较好地保持蝉花孢梗束的色泽、营养和功能成分,且技术成熟度高,适用于工业化大生产。

关键词：蝉花孢梗束干燥营养成分聚类分析

秸秆燃烧排放PM_(2.5)特征及影响因素研究

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化学学报 2016年第4期74卷 356-362页

作者：王玉珏胡敏王渝秦艳红陈红阳曾立民雷建容黄晓锋何凌燕张瑞芹吴志军环境模拟与污染控制国家重点联合实验室北京大学环境科学与工程学院北京100871 郑州大学化学系郑州450001 城市人居环境科学与技术重点实验室北京大学深圳研究生院环境与能源学院深圳518055

生物质燃烧向大气中排放大量颗粒污染物,在中国,收获季节大量秸秆被直接露天燃烧处理,对区域环境质量和人体健康造成严重影响.对我国最主要的两种粮食作物玉米和小麦秸秆的露天燃烧进行模拟,分析颗粒物排放水平,特征及影响因素.玉米和... 详细信息

生物质燃烧向大气中排放大量颗粒污染物,在中国,收获季节大量秸秆被直接露天燃烧处理,对区域环境质量和人体健康造成严重影响.对我国最主要的两种粮食作物玉米和小麦秸秆的露天燃烧进行模拟,分析颗粒物排放水平,特征及影响因素.玉米和小麦秸秆燃烧PM_(2.5)排放因子分别为1082.8和835.7~897.3 mg/kg.有机物是颗粒物最主要组分,总量占PM_(2.5)质量的42%~66%.Cl^-和K^+分别占PM_(2.5)总质量的4%~15%和2%~14%,K^+/EC值为0.5~3.8.各物种在颗粒物中所占比例与之前研究结果一致.秸秆含水量和燃烧温度影响PM_(2.5)排放水平和组成特征.随秸秆含水量增加,PM_(2.5)和OC的排放因子增加;秸秆含水量增加,燃烧温度逐渐降低,由生物质燃料释放进入烟气中的K^+和Cl^-比例逐渐减小导致二者在颗粒物中的比例降低.我国每年由玉米和小麦秸秆露天燃烧排放的PM_(2.5)和OC分别为92.7 Gg和47.5 Gg,在总量中占重要比例.

关键词：生物质燃烧秸秆 PM2.5 排放因子特征影响因素

Overview of Submicron Aerosol Characterization in China Using an Aerodyne High-resolution Aerosol Mass Spectrometer

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Overview of Submicron Aerosol Characterization in China Usin...

An Underwater Target Detection Algorithm Based on Attention Mechanism and Improved YOLOv7

第七届亚洲气溶胶会议

作者： Xiaofeng Huang1 lingyan he1 Lian Xue1 Min Hu2 and Yuanhang Zhang2 1 Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen China 2 State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China

China is one of the most rapidly developing countries in the world, but in the meantime it is suffering from severe air pollution due to heavy industrial/metropolitan emissions. Most previous aerosol studies in China were based on filter sampling followed by laboratory analysis, which provided datasets at a coarse time resolution like a day. The coarse time resolution of the aerosol datasets cannot match the actual faster variation of aerosol properties in the real atmosphere, which strongly favors highly time-resolved on-line measurement techniques. In recent years, our group deployed an Aerodyne high-resolution aerosol mass spectrometer （AMS） in different ambient atmospheres in China. In this presentation, we will overview these on-line AMS measurement results to characterize the properties of submicron particles in China atmosphere, with an emphasis for the Pearl River Delta region.

关键词： AMS aerosol characterization

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Computers, Materials & Continua 2024年第2期78卷 2829-2845页

作者： Liqiu Ren Zhanying Li Xueyu he lingyan Kong Yinghao Zhang College of Information Science and Engineering Dalian Polytechnic UniversityDalian116034China

For underwater robots in the process of performing target detection tasks,the color distortion and the uneven quality of underwater images lead to great difficulties in the feature extraction process of the model,which is prone to issues like error detection,omission detection,and poor ***,this paper proposed the CER-YOLOv7(CBAM-EIOU-RepVGG-YOLOv7)underwater target detection *** improve the algorithm’s capability to retain valid features from both spatial and channel perspectives during the feature extraction phase,we have added a Convolutional Block Attention Module(CBAM)to the backbone *** Reparameterization Visual Geometry Group(RepVGG)module is inserted into the backbone to improve the training and inference *** Efficient Intersection over Union(EIoU)loss is also used as the localization loss function,which reduces the error detection rate and missed detection rate of the *** experimental results of the CER-YOLOv7 algorithm on the UPRC(Underwater Robot Prototype Competition)dataset show that the mAP(mean Average Precision)score of the algorithm is 86.1%,which is a 2.2%improvement compared to the *** feasibility and validity of the CER-YOLOv7 are proved through ablation and comparison experiments,and it is more suitable for underwater target detection.

关键词： Deep learning underwater object detection improved YOLOv7 attention mechanism

Gibberellin promotes cambium reestablishment during secondary vascular tissue regeneration after girdling in an auxin-dependent manner in Populus

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Journal of Integrative Plant Biology 2024年第1期66卷 86-102页

作者： Yufei Zhang lingyan Wang Yuexin Wu Donghui Wang Xin‐Qiang he State Key Laboratory of Protein and Plant Gene Research School of Life SciencesPeking UniversityBeijing 100871China

Secondary vascular tissue(SVT)development and regeneration are regulated by *** this study,we used an in vitro SVT regeneration system to demonstrate that gibberellin(GA)treatment significantly promotes auxin-induced cambium *** GA content by overexpressing or knocking down ent-kaurene synthase(KS)affected secondary growth and SVT regeneration in *** poplar DELLA gene GIBBERELLIC ACID INSENSITIVE(PtoGAI)is expressed in a specific pattern during secondary growth and cambium regeneration after *** of PtoGAI disrupted poplar growth and inhibited cambium regeneration,and the inhibition of cambium regeneration could be partially restored by GA *** analysis of the PtaDR5:GUS transgenic plants,the localization of PIN-FORMED 1(PIN1)and the expression of auxin-related genes found that an additional GA treatment could enhance the auxin response as well as the expression of PIN1,which mediates auxin transport during SVT *** together,these findings suggest that GA promotes cambium regeneration by stimulating auxin signal transduction.

关键词： auxin cambium gibberellin Populus secondary vascular tissue regeneration

Morphology,Nanostructure,and Oxidation Reactivity of Particulate Matter Emitted by Diesel Blending with Various Aromatics

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China Petroleum Processing & Petrochemical Technology 2023年第1期25卷 1-9页

作者： Yang he Li Bo Liu Shuntao Wang Yajun Zhang Ran Guo lingyan SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083 State Key Lab of Engine Reliability WEICHAI Company

This study aims to analyze the influence of the polycyclic aromatic hydrocarbon(PAH)content in diesel on the physical and chemical properties of diesel soot *** diesel fuels with different PAH content were tested on a 11.6 L direct-injection diesel *** raw particulate matter(PM)before the after-treatment devices was collected using the thermophoresis sampling system and the filter sampling system.A transmission electron microscope and Raman spectrometer are used to analyze the physical properties of the soot particles,including morphology,primary particle size distribution,and graphitization degree.A Fourier transform infrared spectrometer and thermogravimetric analyzer are used to characterize the surface chemical composition and oxidation reactivity of soot particles,*** results show that as the PAH content in the fuel decreases,the size of the primary soot particles decreases from 29.58 to 26.70 *** graphitization degree of soot particles first increases and then decreases,and the relative content of the aliphatic hydrocarbon functional groups of soot particles first decreases and then *** T_(10),T_(50),and T_(90) of soot from high-PAH fuel are 505.3,589.3,and 623.5℃,while those from low-PAH fuel are 480.1,557.5,and 599.2℃,*** indicates that exhaust PM generated by the low-PAH fuel has poor oxidation ***,as the PAH content in fuel is further decreased,the excessively high cetane number may cause uneven mixing and incomplete combustion,leading to enhanced oxidation reactivity.

关键词： particulate matter aromatics morphology nanostructure oxidation reactivity

基于有限字符输入的OFDM VLC-RF聚合系统最优能效研究

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控制与信息技术 2022年第4期 71-79页

作者：鲁姗妹方啸何凌燕李兵马帅李世银中国矿业大学信息与控制工程学院江苏徐州221116 东南大学移动通信国家重点实验室江苏南京210096 西安邮电大学陕西省信息通信网络及安全重点实验室陕西西安710121

在有限字符输入的情况下,正交频分复用(orthogonal frequency division multiplexing,OFDM)可见光通信(visible light communications,VLC)和射频(radio frequency,RF)聚合系统的信息传输速率极限仍然是未知的。文章基于互信息公式推导出OFDM VLC-RF聚合系统信息传输速率的无闭式表达式及其下界闭式表达式,并且基于这两种通信速率表达式研究系统能效最大化问题,具体涉及满足频谱效率(spectrum efficiency,SE)门限、总电功率和平均光功率约束的能效最大化问题;同时,使用Dinkelbach-type算法将能量效率最大化非凸问题转变为一系列凸的子问题,再利用内点法求解凸的子问题。仿真结果表明,在SE门限增加时,系统能效先保持恒定不变然后下降,且基于信息传输速率下界的能效可以作为基于信息传输速率能效的低复杂度近似。该研究为实际通信中的聚合系统研究提供了新的方向。

关键词：可见光通信-射频聚合系统正交频分复用能量效率信息传输速率

Effects of different dietary energy and protein levels and sex on growth performance,carcass characteristics and meat quality of F1 Angus x Chinese Xiangxi yellow cattle

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Journal of Animal Science and Biotechnology 2014年第4期5卷 485-496页

作者： lingyan Li Yuankui Zhu Xianyou Wang Yang he Binghai Cao National Beef Cattle Industry and Technology System College of Animal Science and TechnologyChina Agricultural University Tin Wah Industrial Co.Ltd Shimen Industrial Area of Lian Yuan

Background：The experiment evaluated the effect of nutrition levels and sex on the growth performance,carcass characteristics and meat quality of F1 Angus × Chinese Xiangxi yellow ***：During the background period of 184 d,23 steers and 24 heifers were fed the same ration,then put into a2×2×2 factorial arrangement under two levels of- dietary energy（TON：70/80%DM）,protein（CP：11.9/14.3%DM）and sex（S：male/female） during the finishing phase of 146 *** treatments were-（1） high energy/low protein（heLP）,（2） high energy/high protein（heHP）,（3） low energy/low protein（LELP） and（4） low energy/high protein（LEHP）.Each treatment used 6 steers and 6 heifers,except for heLP- 5 steers and 6 ***：Growth rate and final carcass weight were unaffected by dietary energy and protein levels or by *** with the LE diet group,the he group had significantly lower dry matter intake（DMI,6.76 vs.7.48 kg DM/d）,greater chest girth increments（46.1 vs.36.8 cm）,higher carcass fat（19.9 vs.16.3%） and intramuscular fat content（29.9 vs.22.8%DM）.The he group also had improved yields of top and medium top grade commercial meat cuts（39.9 vs.36.5%）.The dressing percentage was higher for the HP group than the LP group（53.4 vs.54.9%）.Steers had a greater length increment（9.0 vs.8.3 cm）,but lower carcass fat content（16.8 vs.19.4%） than *** meat quality traits（shear force value,drip loss,cooking loss and water holding capacity） were not affected by treatments or sex,averaging 3.14 kg,2.5,31.5 and 52.9%,*** nutritive profiles（both fatty and amino acid composition） were not influenced by the energy or protein levels or by ***：The dietary energy and protein levels and sex significantly influenced the carcass characteristics and chemical composition of meat but not thegrowth performance,meat quality traits and nutritive profiles.

关键词： Carcass characteristics Energy F1 Angus × Chinese Xiangxi yellow cattle Growth performance Meat quality Protein Sex