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Dynamic changes of rumen microbiota and serum metabolome revealed increases in meat quality and growth performances of sheep fed bio‑fermented rice straw

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Journal of Animal Science and Biotechnology 2024年第3期15卷 1207-1226页

作者： Yin Yin Kyawt min aung Yao Xu Zhanying Sun Yaqi Zhou Weiyun Zhu Varijakshapanicker Padmakumar Zhankun Tan Yanfen Cheng Laboratory of Gastrointestinal Microbiology National Center for International Research on Animal Gut NutritionNanjing Agricultural UniversityNanjing 210095China Department of Animal Nutrition University of Veterinary ScienceNay Pyi Taw 15013Myanmar International Livestock Research Institute Nairobi 00100Kenya College of Animal Science Tibet Academy of Agricultural and Animal Husbandry SciencesLhasa 850000China State Key Laboratory of Grassland Agro‑Ecosystems Center for Grassland MicrobiomeCollege of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730000China

Background Providing high-quality roughage is crucial for improvement of ruminant production because it is an essential component of their *** previous study showed that feeding bio-fermented rice straw(BF)improved the feed intake and weight gain of ***,it remains unclear why feeding BF to sheep increased their feed intake and weight ***,the purposes of this research were to investigate how the rumen micro-biota and serum metabolome are dynamically changing after feeding BF,as well as how their changes influence the feed intake,digestibility,nutrient transport,meat quality and growth performances of *** growing Hu sheep were allocated into 3 groups:alfalfa hay fed group(AH:positive control),rice straw fed group(RS:negative control)and BF fed group(BF:treatment).Samples of rumen content,blood,rumen epithelium,muscle,feed offered and refusals were collected for the subsequent *** Feeding BF changed the microbial community and rumen fermentation,particularly increasing(P<0.05)relative abundance of Prevotella and propionate production,and decreasing(P<0.05)enteric methane *** histomorphology(height,width,area and thickness)of rumen papillae and gene expression for carbohydrate trans-port(MCT1),tight junction(claudin-1,claudin-4),and cell proliferation(CDK4,Cyclin A2,Cyclin E1)were improved(P<0.05)in sheep fed ***,serum metabolome was also dynamically changed,which led to up-regulating(P<0.05)the primary bile acid biosynthesis and biosynthesis of unsaturated fatty acid in sheep fed *** a result,the higher(P<0.05)feed intake,digestibility,growth rate,feed efficiency,meat quality and mono-unsaturated fatty acid concentration in muscle,and the lower(P<0.05)feed cost per kg of live weight were achieved by feeding *** Feeding BF improved the growth performances and meat quality of sheep and reduced their feed ***,bio-fermentation of rice straw could be an innovative way for improving rum

关键词： Bio-fermentation Growth rate Meat quality Metabolome Microbiota Rice straw

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改进遗传算法嵌入经典分类算法实现润滑油添加剂微小量多种类同步识别

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光谱学与光谱分析 2024年第3期44卷 744-750页

作者：夏延秋谢培元 NAY min aung 张涛冯欣华北电力大学能源动力与机械工程学院北京102206 中国科学院兰州化学物理研究所固体润滑国家重点实验室甘肃兰州730000

在润滑油中加入微少量添加剂就能使润滑油获得某种新的特性或改善润滑油中已有的某些特性的性质。针对机械设备润滑油中微小量添加剂多种类识别问题,基于python语言进行模型建立,采用基础油PAO-10和三种商用润滑油添加剂T321、 T534、 T... 详细信息

在润滑油中加入微少量添加剂就能使润滑油获得某种新的特性或改善润滑油中已有的某些特性的性质。针对机械设备润滑油中微小量添加剂多种类识别问题,基于python语言进行模型建立,采用基础油PAO-10和三种商用润滑油添加剂T321、 T534、 T307按照不同比例配制了8种不同样本。采用Thermo Scientific Nicolet iS5型傅里叶变换红外光谱仪采集了样本4 000~400 cm^(-1)范围附近的中红外光谱信息,并对样本中红外光谱数据采用min-Max归一化进行预处理。使用两种经典分类算法,包括一对多支持向量机(OVR SVMs)、随机森林(RF),嵌入遗传算法(GA)实现中红外光谱特征波段筛选。为避免GA收敛过快和易陷入局部最优解,对GA的选择算子进行了改进,形成基于局部搜索算子的遗传算法(LGA),从而建立多类别分类模型的构建方法。结果显示:嵌入GA筛选波段后的新模型的种类识别准确率从利用经典分类算法对原始波长数据的OVR SVMs(83.33%)、 RF(87.50%)提升至OVR SVMs+GA(100%)、 RF+GA(100%);而嵌入LGA的新模型在保持原模型高准确率的情况下,RF+LGA筛选得到的特征区间长度为原光谱数据长度的36.7%,并且与添加剂物质的红外吸收峰有很好的对应情况。新模型不仅适用于只含单一添加剂的情况,对含有两种及两种以上添加剂的同步识别仍然具有近100%的较高识别率。表明所构建模型可以有效实现微小量润滑油添加剂的快速、准确、多种类同步识别。

关键词：润滑油添加剂中红外光谱经典分类算法改进遗传算法特征波段筛选

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轴承电腐蚀对风电功率的影响研究

轴承电腐蚀对风电功率的影响研究

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作者： NAY min aung 华北电力大学(北京)

学位级别：硕士

风力发电已成为最有前途的可再生能源之一,风力发电装机和发电量越来越大。在风力发电机传动系统中,发电机轴承在电力传输和负载支撑中起着至关重要的作用,其中发电机轴承因轴电流引起轴承电腐蚀,导致轴承失效。因此,了解电腐蚀对发电... 详细信息

风力发电已成为最有前途的可再生能源之一,风力发电装机和发电量越来越大。在风力发电机传动系统中,发电机轴承在电力传输和负载支撑中起着至关重要的作用,其中发电机轴承因轴电流引起轴承电腐蚀,导致轴承失效。因此,了解电腐蚀对发电机轴的影响对保证风力发电的可靠性至关重要。主要工作内容和结果如下:1、对因轴电流导致的发电机轴承电蚀损伤的SCADA数据进行分析,发现轴承温度异常变化是电蚀发生的前兆。使用三种算法从高维信息中提取有用的特征信息,并引入发电量预测模型。在现有数据下,风力发电机轴承温度达到100度以上,将导致轴承发生电腐蚀故障。2、采用载流试验机模拟了轴电流轴承表面电腐蚀的发生条件,研究了轴电流对摩擦副的影响。发现当电压为1V时接触电阻达到40mΩ,并且在30分钟后发生电腐蚀。3、基于轴电流损伤和正常风机SCADA数据,采用SVM回归(SVM-reg)、LSTM和ARIMA模型,对比了两类风机的发电量,发现正常的风力发电机在6个月内平均可发电1.68MW,而电蚀导致停机风机的发电不足正常风机的50%。

关键词：电蚀腐蚀轴承磨损和接触电阻算法风功率

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Multiple Uplift and Exhumation of the Southeastern Tibetan Plateau:Evidence from Low-Temperature Thermochronology

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 569-584页

作者： WU Limin PENG Touping FAN Weiming ZHAO Guochun GAO Jianfeng DONG Xiaohan PENG Shili min Kang Tin aung MYINT State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Chinese Academy of Sciences Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Department of Earth Sciences The University of Hong KongHong Kong 999077China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiGuangdong 519085China Department of Geology University of MandalayMandalay 05011Myanmar

Since the Cenozoic,the Tibetan Plateau has experienced large-scale uplift and outgrowth due to the India-Asia ***,the mechanism and timing of these tectonic processes still remain ***,using apatite fission track dating and inverse thermal modeling,we explore the mechanism of different phases of rapid cooling for different batholiths and intrusions in the southeastern Tibetan *** contrast to previous views,we find that the coeval granitic batholith exposed in the same tectonic zone experienced differential fast uplift in different sites,indicating that the present Tibetan Plateau was the result of differential uplift rather than the entire lithosphere uplift related to lithospheric collapse during Cenozoic *** addition,we also suggest that the 5-2 Ma mantle-related magmatism should be regarded as the critical trigger for the widely coeval cooling event in the southeastern Tibetan Plateau,because it led to the increase in atmospheric CO_(2)level and a hotter upper crust than before,which are efficient for suddenly fast rock weathering and ***,we propose that the current landform of the southeastern Tibetan Plateau was the combined influences of tectonic and climate.

关键词： apatite fission track rapid cooling differential uplift magmatism southeastern Tibetan Plateau

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Shearing Characteristics of Jurassic Silty Mudstone Slip Zone under Different Water Contents and Normal Stresses Based on Ring Shear Tests

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Journal of Earth Science 2022年

作者： Nang Mon Mon Thaw Changdong Li Zongxing Zou Wenqiang Chen Jingjing Long aung min Oo Dafalla Wadi Faculty of Engineering China University of Geosciences Badong National Observation and Research Station of Geohazards China University of Geosciences Department of Geology Hpa-An University 4. Department of Hydrogeology and Engineering Geology College of Petroleum Geology and Minerals University of Bahri

Landslides frequently occurred in Jurassic red strata in the Three Gorges Reservoir(TGR) region in China. The Jurassic strata consist of low mechanical strength and poor permeability of weak silty mudstone layer, which may cause slope instability during rainfall. In order to understand the strength behavior of Jurassic silty mudstone shear zone, the so-called Shizibao landslide located in Guojiaba Town, Zigui County, Three Gorges Reservoir(TGR) in China is selected as a case study. The shear strength of the silty mudstone shear zone is strongly influenced by the water content and normal stress. Therefore, a series of drained ring shear tests were carried out by changing the water contents(7%, 12%, 17%, and 20%, respectively) and normal stresses(200, 300, 400, and 500 k Pa, respectively).The result revealed that the residual friction coefficient and residual friction angle were power function relationships with water content and normal stress. The peak cohesion of the silty mudstone slip zone increased with water content to a certain limit, above which the cohesion decreased. In contrast, the residual cohesion showed the opposite trend, indicating the cohesion recovery above a certain limit of water content. However, both the peak and residual friction angle of the silty mudstone slip zone were observed to decrease steadily with increased water content. Furthermore, the macroscopic morphological features of the shear surface showed that the sliding failure was developed under high normal stress at low water content, while discontinuous sliding surface and soil extrusion were occurred when the water content increased to a saturated degree. The localized liquefaction developed by excess pore water pressure reduced the frictional force within the shear zone. Finally, the combined effects of the slope excavation and precipitation ultimately lead to the failure of the silty mudstone slope; however, continuous rainfall is the main factor triggering sliding.

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东喜马拉雅构造结快速隆升时期:来自缅甸中央盆地沉积学证据

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地球科学 2022年第7期47卷 2573-2585页

作者：鲁毅崔宇驰 Si Si Thu Kyaw Kyaw Khing Myo min aung 朱伟林邵磊同济大学海洋地质国家重点实验室上海200092

东喜马拉雅构造结快速隆升时间以及雅鲁藏布江和伊洛瓦底江是否曾经相连已经争论了超过半个世纪.采用锆石U-Pb年代学等方法,对缅甸中央盆地新生代地层的“源-汇”路径开展研究.缅甸中央盆地始新统发育大量铬尖晶石、各坳陷的锆石年龄谱... 详细信息

东喜马拉雅构造结快速隆升时间以及雅鲁藏布江和伊洛瓦底江是否曾经相连已经争论了超过半个世纪.采用锆石U-Pb年代学等方法,对缅甸中央盆地新生代地层的“源-汇”路径开展研究.缅甸中央盆地始新统发育大量铬尖晶石、各坳陷的锆石年龄谱各不相同,表明该时期沉积物以盆地周边隆起为主要物源,不存在统一的源区;渐新世之后,源自区域变质岩的重矿物组合比例逐渐增加,盆地各坳陷碎屑锆石年龄谱特征趋于一致,均以40~70 Ma的主峰以及80~110 Ma次峰为特征,表明沉积物源区进入抹谷变质带,伊洛瓦底江雏形已经形成;由于缅甸中央盆地渐新统至下中新统完全没有喜马拉雅造山带信息,认为该时期雅鲁藏布江-伊洛瓦底江并未相连.晚中新世-更新世,喜马拉雅造山带特征组合十字石和蓝晶石以及110~130 Ma年龄峰的出现,表明伊洛瓦底江已经侵蚀到东喜马拉雅构造结,达到现今流域规模.因此,东喜马拉雅构造结快速隆升的时间大约在晚中新世.

关键词：青藏东南缘缅甸中央盆地河流演化锆石U-Pb定年重矿物物源分析地质年代学

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Vehicle Navigation System using GPS Receiver

Vehicle Navigation System using GPS Receiver

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International Conference on Computational Techniques and Artificial Intelligence(ICCTAI’2011);International Conference on Advances in Electrical and Electronics Engineering(ICAEE’2011);International Conference on Mechanical,Automobile and Robotics Engineering(ICMAR’2011);International Conference on Management,Behavioral Sciences and Economics Issues(ICMBSE’2011);International Conference on Chemical,Environmental and Biological Sciences(ICCEBS’2011);International Conference on Biotechnology and Pharmaceutical Sciences(ICBPS’2011)

作者： Tin Hla Win Zaw min aung the Electronic Engineering Department at Mandalay Technological University

This paper focused on developing an enhancement of the Vehicle Navigation System by using GPS. This system is helped driver navigate by displaying the current position of vehicle on a displayed map. This system is needed to store required map in PC storage. This system has two parts that involve hardware and software parts construction and the integration of both parts to create the system. It typically used GPS receiver to acquire position data of the vehicle. The microcontroller is connected the GPS receiver to extract vehicular data from GPS NMEA message strings. And then Microcontroller sent latitude and longitude data to PC storage to locate on map by using *** language. One part of Mandalay division is used as displayed map for this system. This map is developed from Google Earth. All interfacing is used serial communication. This system is located the vehicle navigation on Mandalay map. It is also approached to advance Navigation System and GPS technology.

关键词： GPS Microcontroller vehicle PC and Map .

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Characterization of Various Microalgae for Biodiesel Fuel Production

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材料科学与工程（中英文A版） 2011年第1X期1卷 80-86页

作者： Ng Ching Yin Zahira Yaakob Ehsan Ali aung min min Ng Sheng Wa Department of Chemical and Process Faculty of Engineering and Environment Built Universiti Kebangsaan Malaysia Bangi 43600Malaysia

Currently, renewable and sustainable energy is a hot issue to meet the predicted future challenges regarding energy and environment because of the fossil fuel depletion and drastic environmental effects. Biodiesel is designated as renewable, biodegradable, less CO2 and NOx emission fuel as compared to petroleum sourced fuel. Biodiesel from microalgae have emerged as one of the promising sources to displace the petrodiesel. This new approach can contribute to solve few major problems. This study was conducted to determine the characteristic of five microalgae species, two were marine type (Nannochloropsis aculata, Dunaliella sp.) while other three were freshwater type (Chlorella vulgaris, Chlamydomonas reinhardtii, Selenastrum capricornutum). Overall growth rate of marine microalgae was higher than freshwater type among the algal strains under investigation. Oil yields of Dunaliella sp. and Nannochloropsis aculata were higher, 34%, 31.4% respectively based dry weight of microalgae. At the other hand, the oil yields of Chlorella vulgaris, Chlamydomonas reinhardtii and Selenastrum capricornutum were 19.5%, 9.4% and 11.2%, respectively. Analysis of free fatty acid (FFA) as acid palmitic and acid oleic has shown that FFA content of marine microalgae were lower than 0.5% but found higher than 0.5% in fresh water microalgae. FTIR analysis showed the absorption spectrum with five important peaks explaining the stretching absorption due to aldehyde (C=O) and esters (C-O), bending absorption methylene (CH2) and methyl (CH3) groups and hydroxyl bond absorption (O-H) were strong in oil for all microalgae species.

关键词：海洋微藻生物柴油可持续能源游离脂肪酸石油产量表征生产氮氧化物排放

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东喜马拉雅构造结快速隆升时期——来自缅甸中央盆地沉积学证据

东喜马拉雅构造结快速隆升时期——来自缅甸中央盆地沉积学证据

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第十七届全国古地理学及沉积学学术会议

作者：鲁毅崔宇驰 Si Si Thu Kyaw Kyaw Khing Myo min aung 朱伟林邵磊同济大学海洋地质国家重点实验室

(目的)东喜马拉雅构造结快速隆升时间以及雅鲁藏布江和伊洛瓦底江是否曾经相连已经争论了超过半个世纪。(方法)本文采用锆石U-Pb年代学等方法,对缅甸中央盆地新生代地层的"源-汇"路径开展研究,对该问题进行探讨。(结果)缅甸中央盆地始...

(目的)东喜马拉雅构造结快速隆升时间以及雅鲁藏布江和伊洛瓦底江是否曾经相连已经争论了超过半个世纪。(方法)本文采用锆石U-Pb年代学等方法,对缅甸中央盆地新生代地层的"源-汇"路径开展研究,对该问题进行探讨。(结果)缅甸中央盆地始新统发育大量铬尖晶石、各坳陷间锆石年龄谱各不相同,表明该时期沉积物以盆地周边隆起为主要物源,不存在统一的源区;渐新世之后,源自区域变质岩的重矿物组合比例逐渐增加,盆地各坳陷碎屑锆石年龄谱特征趋于一致,均以40-70Ma的主峰以及80-110Ma次峰为特征,表明沉积物源区进入抹谷变质带,伊洛瓦底江雏形已经形成;由于缅甸中央盆地渐新统至下中新统完全没有喜马拉雅造山带信息,可以认为,该时期雅鲁藏布江-伊洛瓦底江并未相连。晚中新世-更新世,喜马拉雅造山带特征组合十字石和蓝晶石以及110-130Ma年龄峰的出现,表明伊洛瓦底江已经侵蚀到东喜马拉雅构造结,达到现今流域规模。(结论)因此,东喜马拉雅构造结快速隆升的时间大约发生在晚中新世。

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Effects of torrefied wood chip and vermicompost application on vegetation growth and nutrient uptake in the Saemangeum reclaimed land

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Ecological Processes 2020年第1期9卷 74-82页

作者： aung aung Jeong min Seo Si Ho Han Ji Young An Huong Thi Thuy Dao Woo Bin Youn Byung Bae Park Department of Environment and Forest Resources College of Agriculture and Life SciencesChungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea Environmental Conservation Department Ministry of Natural Resources and Environmental ConservationNaypyitaw 15011Myanmar Institute of Agricultural Science College of Agriculture and Life SciencesChungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea.

Background:In reclaimed land,the growth environment for plants may be unfavorable and the initial establishment and growth of seedlings could be limited because of low nutrient and water *** and control of understory vegetation that competes with seedlings may be of help in ameliorating soil physical and chemical properties,resulting in better seedling growth and reclamation ***,the amount of nutrients understory vegetation absorbs in this ecological process has been rarely ***,we aimed to investigate the effect of soil amendment on biomass production and nutrient uptake by weeds in the nutrient-poor reclaimed *** applied three levels of torrefied wood chip(TWC;0,2.5,and 5 Mg ha^(−1))and two levels of vermicompost(VC;0 and 2.7 Mg ha^(−1))as soil physical improvements and organic soil amendments in reclaimed land in the Republic of Korea,with Populus euramericana used as the crop ***:TWC did not influence weed biomass,but 2.7 Mg ha^(−1) VC significantly increased weed biomass by 21%compared to 0 Mg ha^(−1) VC ***(N),phosphorus(P),potassium(K),calcium(Ca),magnesium(Mg),and sodium(Na)concentrations in weeds were the highest in control,but there was no statistical difference among ***,VC treatment did marginally increase nutrient uptake in weeds,especially P,K,Ca,and *** treatments influenced crop tree ***:We conclude that VC can be used as an organic source of nutrients in reclaimed soil and that weed management is necessary to increase treatment effects on crop trees in this salt-affected reclaimed land.

关键词： Nutrient content Populus euramericana Saemangeum Soil amendment Weed biomass

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