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Effect of Processing on the Oxalate and Calcium Concentrations of Two Local Dishes, Cơm hến and Canh Chua Bạc hà, Prepared from Taro Stems

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Food and Nutrition Sciences 2017年第6期8卷 624-632页

作者： Du tha.h hang tha. Thi tha.h tra le Minh Tuan geoffrey Peter Savage Faculty of Animal husbandry and Veterinary Medicine Hu&#7871 University of Agriculture and Forestry Hu&#7871 Vietnam Faculty of hospitality & Tourism Hu&#7871 University Hu&#7871 Vietnam Food group Department of Wine Food and Molecular Biosciences Faculty of Agriculture and Life Sciences Lincoln Univer-sity Canterbury New Zealand

Stems of sweet taro (Colocasia esculenta) grown in Thua Thien huếProvince in Vietnam and were used as an ingredient to prepare two local dishes, Cơm hến and Canh Chua Bạc hà. This study investigated the effect of simple processing treatments used to prepare these popular dishes on the total, soluble and insoluble oxalate and calcium contents of the taro stems. Raw stems were used to prepare Cơm hến. Three treatments, removing the skin then washing and slicing, slicing and washing, or slicing and then allowing the stems to wilt overnight were compared to the whole raw stems with the skin retained. Overall, processing the stems reduced the soluble oxalate contents by a mean of 8% when compared with the original raw stems. The mean total calcium bound in the insoluble oxalate fraction of the three processing treatments was 43.3% ± 2.0%. Canh Chua Bạc hà was prepared by boiling peeled taro stems. In this experiment the peeled stems were boiled for 10, 15 and 20 min and this resulted in 63.4%, 74.5% and 76.6% reductions in soluble oxalate content, respectively, when compared to the original peeled stems. Boiling for 20 min was the most effective way to reduce both the total and soluble oxalate contents of the stems. 39% of the total calcium in the raw taro stems was bound to the insoluble oxalate fraction and this was reduced to a mean of 17.2% ± 2.6% by the three cooking treatments.

关键词： Washing Slicing Wilting Boiling Taro Petioles Total Soluble Insoluble Oxalates

Emotion Recognition with Capsule Neural Network

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Computer Systems Science & Engineering 2022年第6期41卷 1083-1098页

作者： Loan Trinh Van Quang h.Nguyen Thuy Dao Thi le School of Information and Communication Technology Hanoi University of Science and TechnologyHanoi10000Vietnam Faculty of Information Technology University of Transport and CommunicationsHanoi10000Vietnam

For human-machine communication to be as effective as human-tohuman communication, research on speech emotion recognition is *** the models and the classifiers used to recognize emotions, neural networks appear to be promising due to the network’s ability to learn and the diversity in configuration. Following the convolutional neural network, a capsuleneural network (CapsNet) with inputs and outputs tha. are not scalar quantitiesbut vectors allows the network to determine the part-whole relationships tha.are specific 6 for an object. This paper performs speech emotion recognition basedon CapsNet. The corpora for speech emotion recognition have been augmented byadding white noise and changing voices. The feature parameters of the recognition system input are mel spectrum images along with the characteristics of thesound source, vocal tract and prosody. For the german emotional corpus EMODB, the average accuracy score for 4 emotions, neutral, boredom, anger and happiness, is 99.69%. For Vietnamese emotional corpus BKEmo, this score is94.23% for 4 emotions, neutral, sadness, anger and happiness. The accuracy scoreis highest when combining all the above feature parameters, and this scoreincreases significantly when combining mel spectrum images with the featuresdirectly related to the fundamental frequency.

关键词： Emotion recognition CapsNet data augmentation mel spectrum image fundamental frequency

Finite Morse Index Solutions of a Nonlinear Schr?dinger Equation

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Acta Mathematica Sinica,English Series 2023年第3期39卷 513-522页

作者： Phuong le Faculty of Economic Mathematics University of Economics and LawHo Chi Minh CityVietnam Vietnam National University Ho Chi Minh CityVietnam

We prove Liouville type theorems for stable and finite Morse index h_(loc)^(1)∩L_(loc)^(∞)solutions of the nonlinear Schrodinger equation -Δu+λ|x|^(a)u=|x|b|^(u)|^(p-1)u in R^(N),where N≥2,λ>0,a,b>-2 and p>1,Our analysis reveals tha. all stable solutions of the equation must be zero for all p>1,Furthermore,finite Morse index solutions must be zero if N≥3 an p≥(N+2+2b)/(N-2).The main tools we use are integral estimates,a Pohozaev type identity and a monotonicity formula.

关键词： Schrodinger equation Liouville type theorems stable solutions finite Morse index solutions monotonicity formula

A Statistical Study on Seismo-Ionospheric Anomalies of the Total Electron Content for the Period of 56 M≥6.0 Earthquakes Occurring in China During 1998—2012

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空间科学学报 2013年第3期33卷 258-269页

作者： Liu J Y Chen C h Tsai h F le h Institute of Space Science National Central University Center for Space and Remote Sensing Research National Central University Department of Earth Science National Cheng Kung University gPS Science and Application Research Center National Central University Key Laboratory of Ionospheric Environment Institute of Geology and GeophysicsChinese Academy of Sciences

This paper reports statistical results of Seismo-Ionospheric Anomalies(SIAs) of the Total Electron Content(TEC) in the global Ionosphere Map(gIM) associated with 56 M≥6.0 earthquakes in China during 1998—*** detect SIA,a quartile-based(***-based) process is *** anomalies for the period of earthquakes without being led by magnetic storms about 10 days are further isolated and examined to confirm the SIP *** show tha. SIA is the TEC significantly decrease in the afternoon period 2—9 days before the earthquakes in China,which is in a good agreement with the SIA appearing before the 12 May 2008 M 8.0 Wenchuan earthquake.

关键词：电离层异常地震发生总电子含量中国统计 SIAS TEC gIM

不同比例全株油菜青贮替代全株玉米青贮对体外模拟瘤胃发酵参数的影响

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动物营养学报 2024年第5期36卷 3363-3372页

作者：王乐高帅张秀敏王敏郑琛王荣甘肃农业大学动物科学技术学院兰州730070 中国科学院亚热带农业生态研究所长沙410125 湖南省畜牧兽医研究所长沙410131

本试验旨在探究不同比例全株油菜青贮替代全株玉米青贮对体外模拟瘤胃发酵总产气、氢气、甲烷和挥发性脂肪酸生成的影响。试验采用单因素试验设计,全株油菜青贮分别以0(对照)、25%、50%、75%和100%的比例替代全株玉米青贮,并选择3只装... 详细信息

本试验旨在探究不同比例全株油菜青贮替代全株玉米青贮对体外模拟瘤胃发酵总产气、氢气、甲烷和挥发性脂肪酸生成的影响。试验采用单因素试验设计,全株油菜青贮分别以0(对照)、25%、50%、75%和100%的比例替代全株玉米青贮,并选择3只装有永久性瘤胃瘘管的湘东黑山羊作为瘤胃液供体,开展72 h体外模拟瘤胃发酵试验。结果表明:1)有机物降解率、每克底物的产气量、降解每克底物的产气量、潜在最大产气量、产气速率和起始底物降解速率,甲烷的每克底物的产气量、降解每克底物的产气量、潜在最大产气量和产气速率,以及氢气的消耗速率、总挥发性脂肪酸含量和丙酸比例均随全株油菜青贮替代比例的提高呈线性降低(Ph、氨态氮含量以及乙酸、异丁酸、戊酸、异戊酸比例和乙酸/丙酸比值均随全株油菜青贮替代比例的提高呈线性提高(Ph、氨态氮含量以及乙酸、异丁酸、戊酸、异戊酸比例和乙酸/丙酸比值均显著升高(P<0.05)。综上所述,全株油菜青贮替代玉米青贮虽然会对体外模拟瘤胃发酵甲烷生成产生抑制作用,但是当替代比例为50%时,发酵底物的有机物降解率显著降低,这说明全株油菜青贮替代玉米青贮的比例不宜超过50%。

关键词：体外模拟瘤胃发酵全株油菜青贮全株玉米青贮甲烷挥发性脂肪酸

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页岩气藏中硫化氢成因研究进展

石油学报 2024年第2期45卷 461-476页

作者：李乐胡远清彭小桂王伟余浩宇崔亚圣湖北省地质科学研究院湖北武汉430034 资源与生态环境地质湖北省重点实验室湖北武汉430034

传统观点认为页岩气藏中不含硫化氢或含有微量的硫化氢,然而在近10年的勘探开发实践中,已有9个页岩气藏发现了低—特高含量硫化氢,其中,高—特高含量的硫化氢多出现于钙质页岩气藏中。根据硫化氢形成时间的先后顺序,通常将"地质天然"和... 详细信息

传统观点认为页岩气藏中不含硫化氢或含有微量的硫化氢,然而在近10年的勘探开发实践中,已有9个页岩气藏发现了低—特高含量硫化氢,其中,高—特高含量的硫化氢多出现于钙质页岩气藏中。根据硫化氢形成时间的先后顺序,通常将"地质天然"和"施工人造"视为硫化氢出现在页岩区带中的两大主因,前者侧重于论证地质历史中天然地质作用所生成的原生硫化氢在气藏内的残留或运移过程;后者强调施工作业(钻井、水力压裂)过程中带入的微生物和化学物质在复杂井底环境中发生多类别作用后形成的后生硫化氢在气藏中的新生出现。"施工人造"因素的提出为解读页岩气藏中出现的硫化氢提供了新的思路,但目前尚未得到普遍关注;同时,其与"地质天然"因素间的互斥或互补的关联尚未梳理清晰。未来的工作应进一步开展页岩气藏中硫化氢的原生供给能力评价研究,同时应基于现场生产数据深入发掘及建立系统的后生硫化氢成因判别标志和产出预测,以深化认识页岩气藏中硫化氢的成因机制,为后续的页岩气勘探开发提供理论支撑。

关键词：硫化氢页岩气藏天然地质作用施工人造微生物化学物质原生供给能力

ground-based and additional science support for SMIle

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Earth and Planetary Physics 2024年第1期8卷 275-298页

作者： J.A.Carter M.Dunlop C.Forsyth K.Oksavik E.Donovon A.Kavanagh S.E.Milan T.Sergienko R.C.Fear D.g.Sibeck M.Connors T.Yeoman X.Tan M.g.g.T.Taylor K.McWilliams J.gjerloev R.Barnes D.D.Billet g.Chisham A.Dimmock M.P.Freeman D.-S.han M.D.hartinger S.-Y.W.hsieh Z.-J.hu M.K.James L.Juusola K.Kauristie E.A.Kronberg M.lester J.Manuel J.Matzka I.McCrea Y.Miyoshi J.Rae L.Ren F.Sigernes E.Spanswick K.Sterne A.Steuwer T.Sun M.-T.Walach B.Walsh C.Wang J.Weygand J.Wild J.Yan J.Zhang Q.-h.Zhang Planetary Sciences group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and Environment Beihang UniversityBeijing 100191China Key Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and Climate Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Physics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden West highfield Campus University of SouthamptonUniversity RoadSO171BJUK goddard Space Flight Center NASAGreenbeltMarylandUSA Atha.asca University AthabascaCanada ESTEC European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada The Johns hopkins University Applied Physics Laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden Tongji University Shanghai 200092China Center for Space Plasma Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish Meteorological Institute(FMI) Finland Department of Earth and Environmental Sciences(geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada gFZ german Research Centre for geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic geophysics University Centre in Svalbard

The joint European Space Agency and Chinese Academy of Sciences Solar wind Magnetosphere Ionosphere Link Explorer(SMIle)mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,and simultaneously monitor the auroral response of the Northern hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety of cadences by additional ground-based and space-based instruments will enable a much greater scientific impact beyond the original goals of the SMIle ***,we describe current community efforts to prepare for SMIle,and the benefits and context various experiments tha. have explicitly expressed support for SMIle can offer.A dedicated group of international scientists representing many different experiment types and geographical locations,the ground-based and Additional Science Working group,is facilitating these *** include constructing an online SMIle Data Fusion Facility,the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community engagement with the SMIle mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMIle conjunctions missions

基于rgO/BB水凝胶粒子电极的三维电化学吸附碳酸铀酰离子研究

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核技术 2024年第8期47卷 23-35页

作者：乐冬冬邓启湘杜安松王红强王清良李乐胡鄂明雷治武胡芳南华大学资源环境与安全工程学院衡阳421001 南华大学图书馆衡阳421001 中诚建设有限公司新乡453400 南华大学公共卫生学院衡阳421001

铀的采冶过程中,会产生大量的含铀废水,容易造成地下水的污染。在受污染的地下水中,铀常与碳酸盐结合形成扩散性更强、迁移性更高的碳酸铀酰络合物,这使得铀的去除变得更加困难。将氧化石墨烯和竹炭共混,通过低温水热还原反应将竹炭组... 详细信息

铀的采冶过程中,会产生大量的含铀废水,容易造成地下水的污染。在受污染的地下水中,铀常与碳酸盐结合形成扩散性更强、迁移性更高的碳酸铀酰络合物,这使得铀的去除变得更加困难。将氧化石墨烯和竹炭共混,通过低温水热还原反应将竹炭组装至还原氧化石墨烯水凝胶的骨架上,制备具有三维多孔结构的rgO/BB水凝胶。将rgO/BB水凝胶作为三维电化学系统中的粒子电极,探究电解质(硝酸钠)浓度、外加电压、极板间距、ph和rgO/BB水凝胶粒子电极用量等因素对三维电化学系统吸附碳酸铀酰离子性能的影响。实验结果表明,在ph4~8、极板间距4cm、电压5 V、rgO/BB水凝胶用量90mg的条件下,对200mL浓度为1~1000 mg·L^(-1)的碳酸铀酰均具有良好的吸附率,即使当碳酸铀酰浓度为1000 mg·L^(-1)时,14 h吸附率依然可以达到87.56%。经过5次吸附解吸循环后,吸附率仍然保持在87%以上,具有较好的循环再生性能。引入和使用rgO/BB水凝胶粒子电极显著提高了电化学系统对铀的吸附能力,其中羧基和羟基对铀吸附发挥着重要作用。这些结果说明,基于rgO/BB水凝胶粒子电极的三维电化学系统对去除碳酸铀酰离子具有很大的应用潜力。

关键词：竹炭 rgO/BB水凝胶粒子电极铀电化学系统

华南燕山期佛冈–南昆山花岗岩石成因:来自锆石微量元素、h_(2)O含量及hf-O同位素的约束

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地球化学 2024年第3期53卷 426-444页

作者：蔡克鸿夏小平丁兴杨晴张乐中国科学院广州地球化学研究所同位素地球化学国家重点实验室广东广州510640 中国科学院深地科学卓越创新中心广东广州510640 中国科学院大学地球与行星科学学院北京100049

华南地区发育大规模与稀有金属成矿相关的燕山期花岗岩,其岩石类型与成因存在诸多争议,厘清这些争议有助于理解华南地区的成矿作用。锆石是花岗岩中常见的副矿物,具有非常稳定的物理化学性质,不容易受后期地质作用影响,可以很好地保存... 详细信息

华南地区发育大规模与稀有金属成矿相关的燕山期花岗岩,其岩石类型与成因存在诸多争议,厘清这些争议有助于理解华南地区的成矿作用。锆石是花岗岩中常见的副矿物,具有非常稳定的物理化学性质,不容易受后期地质作用影响,可以很好地保存其形成时母岩浆的地球化学信息,从而避免全岩地球化学分析的不足。本研究选取华南地区佛冈–南昆山花岗岩中的锆石进行LA-ICP-MS微量元素和hf同位素研究,结合SIMS氧同位素和h_(2)O含量等数据,探讨佛冈岩体和南昆山岩体的岩石类型和成因。两个岩体的锆石都呈现LREE亏损、hREE富集、Eu负异常、Ce正异常,以及Zr/hf>55、Eu/Eu~*>0.005、hf含量低(hf(t)值(-13.6~-5.7)、较低的h_(2)O含量(核密度峰值317~412μg/g)以及较高的锆饱和温度(799~800℃)表明,佛冈花岗岩可能是源区有高比例沉积物加入的A型花岗岩。南昆山岩体也具有类似的、但变化范围更大的锆石δ18O值(6.34‰~11.11‰)、εhf(t)值(-11.1~1.1)和h_(2)O含量(297~1253μg/g)。锆石hf-O同位素和h_(2)O含量分析结果显示,二者均具有壳幔混合的特点,其中南昆山花岗岩源区地幔物质加入比例更大。

关键词：花岗岩锆石微量元素 hf-O同位素 h_(2)O含量壳幔混合