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Effects of salt and rice flour concentration on microbial diversity and the quality of sour meat,a Chinese traditional meat

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Food Science and Human Wellness 2024年第5期13卷 2790-2798页

作者： Mengyang Liu xinping lin Jing Yang Xu Yan Chaofan Ji Huipeng Liang Sufang Zhang Liang Dong SKL of Marine Food Processing&Safety Control National Engineering Research Center of SeafoodCollaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep ProcessingLiaoning Province Collaborative Innovation Center for Marine Food Deep ProcessingSchool of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China Department of Agricultural Forest and Food SciencesUniversity of TorinoTurin 10095Italy Institute of Technology China Resources Beer(Holdings)Company LimitedBeijing 100005China

This study investigated the effects of salt(3%and 6%,m/m)and rice flour(10%and 20%,m/m)addition in sour meat,a traditional Chinese fermented *** was found that salt has greater effect than rice flour addition in spontaneous ***-salt groups had lower pH and higher titratable total *** the low-salt groups,the dominant genera were Lactobacillus and Lactococcus,whereas Staphylococcus,Weissella,and Tetragenococcus were dominant in the high-salt *** total free amino acids and essential amino acids,organic acids,hexanoic acid ethyl ester and octanoic acid ethyl ester were found in the low-salt *** RDA analysis revealed that Lactococcus was closely related to product quality,with the S3F10(3%salt and 10%rice f lour)group outperforming the others in the sensory ***,3%salt and 10%rice flour were considered more appropriate for the production of healthy and tasty fermented sour meats.

关键词： Low salt Fermented meat Bacterial community Amino acid content Volatile compounds Ester Sour meat

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微冻贮藏臭鳜鱼品质、蛋白质组成和挥发性风味物质的变化

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中国食品学报 2024年第4期24卷 294-303页

作者：周迎芹黄晶晶杨明柳林心萍鄢嫣杨立谢宁宁安徽省农业科学院农产品加工研究所合肥230031 安徽省食品微生物发酵与功能应用工程实验室合肥230031 安徽富煌三珍食品集团有限公司安徽巢湖238000 大连工业大学国家海洋食品工程技术研究中心辽宁大连116034

以-2℃贮藏的臭鳜鱼为对象,研究其在贮藏过程中蒜瓣肉品质、蛋白质组成以及挥发性风味物质的变化规律。结果表明:贮藏15 d后,鱼体蒜瓣肉出现明显发红现象,色泽a*值由负值(绿色)变为正值(红色),白度明显下降,硬度不断增加,弹性和凝聚性... 详细信息

以-2℃贮藏的臭鳜鱼为对象,研究其在贮藏过程中蒜瓣肉品质、蛋白质组成以及挥发性风味物质的变化规律。结果表明:贮藏15 d后,鱼体蒜瓣肉出现明显发红现象,色泽a*值由负值(绿色)变为正值(红色),白度明显下降,硬度不断增加,弹性和凝聚性不断下降,整体感官品质明显下降。十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)结果显示,在微冻贮藏过程中,鱼肉肌浆蛋白、肌原纤维蛋白在不断降解。气相色谱-离子迁移谱(GC-IMS)结果表明,臭鳜鱼贮藏过程中被检出31种挥发性风味物质,其中辛醛、丙酸、3-羟基-2-丁酮、乙酸己酯、丁酸戊酯随着贮藏时间的延长不断积累,具有刺激性臭味的丙酸含量较高,且贮藏15 d后明显增加,不利于臭鳜鱼正常风味的保持。结论:在-2℃微冻贮藏条件下,15 d内臭鳜鱼的感官及风味品质能较好地保持,15 d后开始劣变。研究结果为臭鳜鱼在微冻贮藏过程中的品质调控提供一定的理论依据。

关键词：臭鳜鱼微冻蒜瓣肉蛋白质组成挥发性风味物质

Nb_(2)O_(5)对3Y-TZP陶瓷性能影响的研究

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中国锰业 2024年第2期42卷 47-49,61页

作者：林信平李和祯陈戈比亚迪股份有限公司广东深圳518118 惠州比亚迪电子有限公司广东惠州516083

研究了Nb_(2)O_(5)的加入对3Y-TZP陶瓷性能的影响,主要包括对硬度、韧性、冲击性的影响,并且结合显微形貌以及XRD物相图谱分析出的晶轴比进行分析。结果表明,随着Nb_(2)O_(5)添加量的增加,陶瓷的韧性呈现提升趋势,硬度呈现降低趋势,强... 详细信息

研究了Nb_(2)O_(5)的加入对3Y-TZP陶瓷性能的影响,主要包括对硬度、韧性、冲击性的影响,并且结合显微形貌以及XRD物相图谱分析出的晶轴比进行分析。结果表明,随着Nb_(2)O_(5)添加量的增加,陶瓷的韧性呈现提升趋势,硬度呈现降低趋势,强度呈现先上升后下降趋势。这一现象的产生,一方面归因于Nb_(2)O_(5)的加入让陶瓷生成异相小晶粒,进而提供异相颗粒增韧阻碍裂纹扩展;另一方面,由于Nb^(5+)的引入提高了晶轴比,从而让相变更容易发生。综上所述,Nb_(2)O_(5)的最佳添加质量分数为0.5%。

关键词： 3Y-TZP Nb_(2)O_(5) 异相颗粒增韧晶轴比

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ARTP和NTG诱变选育的解脂耶氏酵母对酸肉风味的影响

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中国食品学报 2024年第5期24卷 190-201页

作者：郭冰蕊蒋翠翠张素芳梁会朋纪超凡陈映羲董亮林心萍大连工业大学食品学院国家海洋食品工程技术研究中心辽宁大连116034 华润雪花啤酒(中国)有限公司北京100000

采用常压室温等离子体(ARTP)和亚硝基胍(NTG)诱变技术处理解脂耶氏酵母C11,研究诱变前、后菌株的酶学性质。最终筛选出4株突变菌A6、A13、A14、N12,酶活分别为1.007,1.554,1.139,1.021 U/mL,是起始菌株的1.41,2.17,1.59,1.43倍。4株突... 详细信息

采用常压室温等离子体(ARTP)和亚硝基胍(NTG)诱变技术处理解脂耶氏酵母C11,研究诱变前、后菌株的酶学性质。最终筛选出4株突变菌A6、A13、A14、N12,酶活分别为1.007,1.554,1.139,1.021 U/mL,是起始菌株的1.41,2.17,1.59,1.43倍。4株突变株的最适温度为50℃、最适pH值为8.0。乙醇对脂肪酶酶活有抑制作用,最适底物由C8酯变化为C4酯。将A13、N12接种到酸肉发酵中,采用固相微萃取结合气相色谱-质谱法测定样品中挥发性物质,结果表明接种突变株能很好地改善酸肉的感官品质,促进酯类、醛类、醇类等挥发性风味物质的产生,显著提高丁酸乙酯、己酸乙酯、辛酸乙酯、癸酸乙酯、庚醛、壬醛、(E,E)-2,4-癸二烯醛和1-辛烯-3-醇的气味活性值(OAV),赋予酸肉玫瑰香味、蘑菇味、焦香味、水果味等风味。

关键词：脂肪酶解脂耶氏酵母常压室温等离子体亚硝基胍诱变酸肉挥发性风味物质

Generalized Parallel Coprime Array for Two-Dimensional DOA Estimation:A Perspective from Maximizing Degree of Freedom

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China Communications 2021年第4期18卷 14-26页

作者： Luo Chen xinping lin Beizuo Zhu Xiaofei Zhang College of Electronic Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211106China The 28th Research Institute of China Electronics Technology Group Corporation Nanjing 210007China

Parallel arrays with coprime subarrays have shown its potential advantages for two dimensional direction of arrival(DOA)*** this paper,by introducing two flexible coprime factors to enlarge the inter-element spacing of parallel uniform subarrays,we propose a generalized parallel coprime array(GPCA)*** proposed geometry enjoys flexible array layouts by the coprime factors and enables to extend the array aperture to achieve great improvement of estimation ***,we verify that GPCA always can obtain M2 degrees of freedom(DOFs)in co-array domain via 2M sensors after optimization,which outperforms sparse parallel array geometries,such as parallel coprime array(PCA)and parallel augmented coprime array(PACA),and is the same as parallel nested array(PNA)with extended *** superiority of GPCA geometry has been proved by numerical simulations with sparse representation methods.

关键词： direction of arrival estimation generalized parallel coprime array degrees of freedom array aperture coprime factors

Multiple Emitters Localization by UAV with Nested linear Array:System Scheme and 2D-DOA Estimation Algorithm

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China Communications 2020年第3期17卷 117-130页

作者： xinping lin Xiaofei Zhang Lang He Wang Zheng College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211100China Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyChina

Unmanned Aerial Vehicle(UAV)equipped with uniform linear array has been applied to multiple emitters ***,nested linear array enables to enhance localization resolution and achieve under-determined Direction of Arrival(DOA)*** this paper,we propose a new system structure for emitters localization that combines the UAV with nested linear array,which is capable of significantly increasing the positioning accuracy of interested ***,a localization scheme is designed to obtain the paired two-dimensional DOA(2D-DOA,*** and elevation angles)estimates of emitters by nested linear array with ***,we propose an improved DOA estimation algorithm for emitters localization that utilizes Discrete Fourier Transform(DFT)method to obtain coarse DOA estimates,subsequently,achieve the fine DOA estimates by sparse *** proposed algorithm has lower computational complexity because the coarse DOA estimates enable to shrink the range of over-complete dictionary of sparse *** addition,compared to traditional uniform linear array,improved 2D-DOA estimation performance of emitters can be obtained with a nested linear *** simulation results testify the effectiveness of the proposed method.

关键词： computational complexity DOA estimation discrete Fourier transform degrees of freedom nested array sparse representation unmanned aerial vehicle

Computationally Efficient Direction of Arrival Estimation for Improved Nested linear Array

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第6期36卷 1018-1025页

作者： lin xinping ZHOU Mengjie ZHANG Xiaofei LI Jianfeng College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

Nested linear array enables to enhance localization resolution and achieve under-determined direction of arrival(DOA)*** this paper,the traditional two-level nested linear array is improved to achieve more degrees of freedom(DOFs)and better angle estimation ***,a computationally efficient DOA estimation algorithm is *** discrete Fourier transform(DFT)method is utilized to obtain coarse DOA estimates,and subsequently,fine DOA estimates are achieved by spatial smoothing multiple signals classification(SS-MUSIC)*** to SS-MUSIC algorithm,the proposed algorithm has the same estimation accuracy with lower computational complexity because the coarse DOA estimates enable to shrink the range of angle spectral *** addition,the estimation of the number of signals is not required in advance by DFT *** simulation results testify the effectiveness of the proposed algorithm.

关键词： DOA estimation nested linear array DOFs SS-MUSIC algorithm computational complexity

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基于算力消耗与灵敏度的图像相似度算法对比

软件 2024年第5期45卷 46-48页

作者：关达伟林欣平张昊一北京交通大学(威海校区) 山东威海264400

本文致力于研究在工业场景下分析图像相似度算法。考虑灵敏度和算力需求,通过横向比较不同算法的计算时间和灵敏度,在随机和梯度数据集下评估性能,以找出满足实验预期的最优化算法,即为找出不合格产品的最优化算法。

关键词：工业产品相似度检测算法灵敏度分析

喷砂工艺对Y-TZP力学性能和表面粗糙度的影响

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中国锰业 2024年第1期42卷 72-76页

作者：林信平陈戈杨清平李和祯比亚迪股份有限公司广东深圳518118 惠州比亚迪电子有限公司广东惠州516083

为了评估不同喷砂工艺对氧化锆陶瓷力学性能和表面粗糙度的影响,采用不同的喷砂处理工艺对样品进行喷砂处理。研究表明氧化锆陶瓷经过喷砂处理后表层单斜相含量明显增加。喷砂原料的颗粒尺寸越大,相变越多。喷砂后表面粗糙度增加,在相... 详细信息

为了评估不同喷砂工艺对氧化锆陶瓷力学性能和表面粗糙度的影响,采用不同的喷砂处理工艺对样品进行喷砂处理。研究表明氧化锆陶瓷经过喷砂处理后表层单斜相含量明显增加。喷砂原料的颗粒尺寸越大,相变越多。喷砂后表面粗糙度增加,在相同的喷砂条件下,经球形Al_(2)O_(3)处理的样品表面粗糙度Sa远小于经SiC颗粒处理的。在喷砂原料粒径为100μm、喷砂时间为20 s、压力为0.2 MPa的情况下,四点弯曲强度分别提高了27%(SiC)与21%(Al_(2)O_(3))。因此,具有球形颗粒形貌的Al_(2)O_(3)颗粒更适合用作表面喷砂处理。

关键词：四方多晶氧化锆喷砂相转变弯曲强度表面粗糙度