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Chinese Physics B 2021年第6期30卷 588-593页

作者： riya Sebastian m S Swapna Vimal Raj S Sankararaman Department of Optoelectronics University of KeralaTrivandrum 695581KeralaIndia

The paper explores the evolution of thermal behavior of the material by studying the variations in thermal diffusivity using the single beam thermal lens(TL) technique. For this purpose, the decomposition of Cu(OH)_(2) into CuO is studied in a time range up to 120 h, by subjecting the sample to morphological, structural, and spectroscopic characterizations. The time evolution of thermal diffusivity can be divided into three regions for demonstrating the dynamics of the reaction. When the reaction is complete, the thermal diffusivity is also found to be saturated. In addition to the morphological modifications,from rods to flakes, the variations in the amount of hydroxyl group are attributed to be responsible for the enhancement of base fluid's thermal diffusivity by 165%. Thus the study unveils the role of hydroxyl groups in the thermal behavior of CuO.

关键词： thermal diffusivity CuO thermal lens morphology hydroxyl group

Short-Term Responses of Nitrous Oxide Emissions and Concentration Profiles to Fertilization and Irrigation in Greenhouse Vegetable Cultivation

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Pedosphere 2012年第6期22卷 764-775页

作者： S. riya mIN Ju ZHOU Sheng SHI Wei-ming m. HOSOmI Graduate School of Engineering Tokyo University of Agriculture and Technology Tokyo 184-8588 (Japan) State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China) InstitUte of Engineering Tokyo University of Agriculture and Technology Tokyo 184-8588 (Japan)

In vegetable cultivation, the majority of N2O emissions occur after fertilization; it is therefore important to understand any factors contributing to this process. An experiment was conducted to investigate short-term N2O dynamics following topdressing in a greenhouse vegetable field in South China. During two topdressing processes, three different urea-N treatments with irrigation were conducted in may and June in a tomato （Lycopersicum esculentum） cultivation. The N2O fluxes, soil concentration profiles and soil environments at the 0-60 cm depths at 10 cm intervals were measured both immediately prior to and 5 days after topdressing. The N2O fluxes before topdressing ranged from 6.7=1=2.1 to 55.0-4-28.8 μg N m-2 h-1; even higher numbers were recorded in highly fertilized plots. The NO3-N accumulation in the soil caused by vegetable cultivation during the 5 years prior to the start of the experiment, resulted in high background N2O fluxes. One day after topdressing （1 DAT） in may and June, N2O fluxes increased, which coincided with sharp increases in soil N2O concentrations at depths of 2.5 and 15 cm and in NOa-N and NH4＋-N contents at depths of 0-20 cm. From 1 to 5 DAT, fluctuations in the N2O fluxes did not harmonize with the N2O concentrations at a depth of 2.5 cm, which was attributed to different gas diffusion rates at depths of 0-10cm. These results suggested that surface soil N and environmental conditions were crucial for determining the short-term N2O ebullitions during topdressing in greenhouse vegetable cultivation.

关键词： nitrogen application N2O soil profile topdressing vegetable field

Focal mechanism and seismogenic structure of the Shiqu mS4.4 earthquake

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Earthquake Research Advances 2021年第4期1卷 28-37页

作者： Yanming Yang Shubo Wang riya Su Earthquake Agency of Inner mongolia Autonomous Region Hohhot010010China

The focal mechanism solution of the Shiqu mS 4.4 earthquake occurred on may 16th,2017 in Sichuan Province is studied by the gCAP method using the waveform data from the regional seismic networks in Sichuan,Qinghai,Tibet and Gansu *** strike/dip/dipping angle of the first nodal plane are 214/80/167and those of the second nodal plane are 306/77/10,the optimal centroid depth is 7.30.6 km and the moment magnitude is mW ***,the study investigates the robustness of the results against the error of crustal velocity structure,location,data quality and difference of seismic parameters,subsequently obtaining a stable resolved focal *** to the geological structure in the seismogenic area,spatial distribution of aftershock sequenceof the regional tectonic stress field,and the focal mechanism of the main shock,we suggest that the Shiqu earthquake is induced by a left-lateral strike-slip mechanism and the second nodal plane is inferred to be the seismogenic fault,consistent with the geometry of the Changshagongma fault which is the secondary fault of the northwest part of the Xianshuihe fault zone.

关键词： Shiqu Focal mechanism Seismogenic structure Qinghai-Tibetan plateau Xianshuihe fault zone

In Situ Dissimilatory Nitrate Reduction to Ammonium in a Paddy Soil Fertilized with Liquid Cattle Waste

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Pedosphere 2012年第3期22卷 314-321页

作者： LU Wei-Wei S.riya ZHOU Sheng m.HOSOmI ZHANG Hai-Lin SHI Wei-ming State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) Graduate University of Chinese Academy of Sciences Beijing 100049(China) Graduate School of Engineering Tokyo University of Agriculture and TechnologyTokyo 184-8588(Japan) Institute of Engineering Tokyo University of Agriculture and TechnologyTokyo 184-8588(Japan) Department of Plant and Soil Sciences Oklahoma State UniversityStillwaterOK 74078(USA)

most studies on dissimilatory nitrate reduction to ammonium （DNRA） in paddy soils were conducted in the laboratory and in situ studies are in need for better understanding of the DNRA process. In this study, in situ incubations of soil DNRA using ^15N tracer were carried out in paddy fields under conventional water （CW） and low water （LW） managements to explore the potential of soil DNRA after liquid cattle waste （LCW） application and to investigate the impacts of soil redox potential （Eh） and labile carbon on DNRA. DNRA rates ranged from 3.06 to 10.40 mg N kg 1 dry soil d-1, which accounted for 8.55%-12.36% and 3.88% 25.44% of consumption of added NO3-^15N when Eh at 5 cm soil depth ranged from 230 to 414 mV and -225 to -65 mV, respectively. DNRA rates showed no significant difference in paddy soils under two water managements although soil Eh and/or dissolved organic carbon （DOC） were more favorable for DNRA in the paddy soil under CW management 1 d before, or 5 and 7 d after LCW application. Soil DNRA rates were negatively correlated with soil Eh （P 〈 0.05, n = 5） but positively correlated with soil DOC （P 〈 0.05, n - 5） in the paddy soil under LW management, while no significant correlations were shown in the paddy soil under CW management. The potential of DNRA measured in situ was consistent with previous laboratory studies; and the controlling factors of DNRA in paddy soils might be different under different water managements, probably due to the presence of different microfioras of DNRA.

关键词： labile soil carbon livestock waste ^15N labeling soil redox potential

Encryption with User Authentication model for Internet of medical Things Environment

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Intelligent Automation & Soft Computing 2023年第1期35卷 507-520页

作者： K.S.riya R.Surendran Carlos Andrés Tavera Romero m.Sadish Sendil Department of Information Technology Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Center for Artificial Intelligence and Research(CAIR) Chennai Institute of TechnologyChennai600069India COmBA R&D Laboratory Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Department of Emerging Technologies Guru Nanak Institute of TechnologyIbrahipatnam501506TelanganaIndia

Internet of medical Things(IomT)enabled e-healthcare has the potential to greately improve conventional healthcare services ***,security and privacy become major issues of IomT because of the restricted processing abilities,storage,and energy constraints of the ***,it leads to infeasibility of developing traditional cryptographic solutions to the IomT *** order to ensure security on sensitive medical data,effective encryption and authentication techniques need to be designed to assure security of the patients and healthcare service *** this view,this study designs an effective metaheuristic optimization based encryption with user authentication(EmOE-UA)technique for IomT *** work proposes an EmOE-UA technique aims to accomplish mutual authentication for addressing the security issues and reducing the computational ***,the EmOE-UA technique employs optimal multikey homomorphic encryption(OmKHE)technique to encrypt the IomT ***,the improved social spider optimization algorithm(ISSOA)was employed for the optimal multikey generation of the mKHE *** experimental result analysis of the EmOE-UA technique takes place using benchmark data and the results are examined under various *** simulation results reported the considerably better performance of the EmOE-UA technique over the existing techniques.

关键词： User authentication security privacy internet of medical things homomorphic encryption optimal key generation

The Conversion Relationship between the Local Earthquake magnitude and Surface Wave magnitude in the Inner mongolia Digital Seismic Network

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Earthquake Research in China 2019年第1期33卷 86-96页

作者： LIU Fang SU riya XU Xiquan LI Hui NA Re Earthquake Agency of Inner mongolia Autonomous Region

Using 116 earthquakes over m_L3.8 in the Inner mongolia region from 2008 to 2015, the local earthquake magnitude m_L and surface wave magnitude m_S are remeasured. Based on norm linear regression(SR1 and SR2) and norm(OR) orthogonal regression method, we established the conversion relationship between m_L and m_S. The results were tested with Gaussian disturbance. The result shows that the orthogonal regression method(OR) result has the best fitting curve, and the conversion relation is m_S=0.96 m_L-0.10. The difference between our result and Guo Lücan's(m_S=1.13 m_L-1.08) may be caused by regional tectonic characteristics. m_(S Inner mongolia) value is significantly higher than the m_(S empirical) value, with an average difference of 0.23, the difference distribution of empirical relation and the rectified relation is in the range of 0.2-0.3.

关键词： Local earthquake magnitude mL Surface wave magnitude mS Gauss perturbation magnitude conversion

Accretion properties of mAXI J1813-095 during its failed outburst in 2018

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Research in Astronomy and Astrophysics 2021年第5期21卷 235-246页

作者： Arghajit Jana Gaurava K.Jaisawal Sachindra Naik Neeraj Kumari Debjit Chatterjee KaushikChatterjee riya Bhowmick Sandip KChakrabarti Hsiang-Kuang Chang Dipak Debnath Astronomy&Astrophysics Division Physical Research LaboratoryNavrangpuraAhmedabad 380009India National Space Institute Technical University of DenmarkElektrovej327-328DK-2800 LyngbyDenmark High Energy Astrophysics Indian Centre for Space PhysicsGaria St RoadKolkata 700084India Department of Physics Indian Institute of TechnologyGandhinagar 382355GujaratIndia Indian Institute of Astrophysics KoramangalaBangalore 560034India Department of Physics “National Tsing Hua University”Hsinchu 30013China

We present the results obtained from detailed timing and spectral studies of a black hole candidate mAXI J1813-095 using Swift,NICER,and NuSTAR observations during its 2018 *** timing behavior of the source is mainly studied by examining NICER light curves in the 0.5−10 keV *** did not find any signature of quasi-periodic oscillations in the power density spectra of the *** carry out spectral analysis with a combined disk blackbody&power law model,and physical two-component advective flow(TCAF)*** the combined disk blackbody&power-law model,we extracted thermal and non-thermal fluxes,photon index and inner disk *** also find evidence for weak reflection in the *** have tested the physical TCAF model on a broadband spectrum from NuSTAR and Swift/*** parameters like mass accretion rates,the size of Compton clouds and the shock strength are *** result affirms that the source remained in the hard state during the entire outburst which indicates a‘failed’*** estimate the mass of the black hole as 7.4±1.5m⊙from the spectral study with the TCAF *** apply the LAOR model for the Fe K line *** this,the spin parameter of the black hole is ascertained as a^(∗)>*** inclination angle of the system is estimated to be in the range of 28°−45°from the reflection *** find the source distance to be∼6 kpc.

关键词： X-Rays:binaries stars individual:(mAXI J1813-095) stars:black holes accretion,accretion disks–shock waves radiation:dynamics

地面不平条件下考虑滑动转向特性的履带车辆路径跟踪控制

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中南大学学报（自然科学版） 2022年第2期53卷 491-501页

作者：康翌婷张煜曾日芽北京科技大学机械工程学院北京100083 比亚迪汽车工业有限公司产品规划及汽车新技术研究院广东深圳518118

针对履带式车辆自主行驶控制中滑动参数难以精确估计和在复杂地面条件下难以稳定跟踪目标路径的问题,提出一种考虑履带车辆滑动转向特性的改进模型,并以此为被控对象设计基于深度强化学习方法的路径跟踪控制器。首先,基于球-面接触原理... 详细信息

针对履带式车辆自主行驶控制中滑动参数难以精确估计和在复杂地面条件下难以稳定跟踪目标路径的问题,提出一种考虑履带车辆滑动转向特性的改进模型,并以此为被控对象设计基于深度强化学习方法的路径跟踪控制器。首先,基于球-面接触原理建立履带车辆的动力学模型。其次,提出基于实车稳态转向实验数据的滑移率估计方法,并结合履带车辆的滑动转向特性,提出改进模型。然后,基于深度确定性策略梯度算法,同时考虑跟踪目标路径时的位置、航向角、速度误差和控制量的平稳性4个控制目标,设计四级奖励函数用于路径跟踪控制器的训练。最后,在平整地面上训练控制器,在不平地面上进行自抗扰性的验证。研究结果表明:在相同的输入下,改进后模型的转向半径和横摆角速度与实车的实验数据吻合。控制器在地面不平条件下仍然能够实现稳定的路径跟踪控制,跟踪正弦曲线的位置绝对误差小于0.06 m,航向角绝对误差小于0.25 rad,控制算法的有效性和自抗扰性得到验证。

关键词：履带车辆球-面接触原理滑移率估计深度确定性策略梯度路径跟踪

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气体二氧化氯对图书馆空间环境的消毒研究

环境污染与防治 2011年第5期33卷 76-78页

作者：奚小艳晋日亚杨鑫霖中北大学化工与环境学院山西太原030051

选用高纯气体二氧化氯作为杀菌消毒剂,以中北大学图书馆阅览室作为研究对象,采用五点梅花法对空气中细菌进行采样,平板涂布法对采集到的细菌进行计数。通过研究不同气体二氧化氯浓度和杀菌时间条件下,气体二氧化氯对图书馆阅览室的杀菌... 详细信息

选用高纯气体二氧化氯作为杀菌消毒剂,以中北大学图书馆阅览室作为研究对象,采用五点梅花法对空气中细菌进行采样,平板涂布法对采集到的细菌进行计数。通过研究不同气体二氧化氯浓度和杀菌时间条件下,气体二氧化氯对图书馆阅览室的杀菌效果,得出气体二氧化氯在低浓度下灭活细菌的最佳条件,即气体二氧化氯质量浓度为0.3 mg/m3、杀菌时间为60 min时,杀菌率达到99.8%。

关键词：气体二氧化氯图书馆消毒

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沙蓬粗寡糖对GK大鼠胰岛素抵抗的影响

中国药理学通报 2016年第3期32卷 403-409页

作者：包书茵韩淑英澈力格尔朝日雅奥.乌力吉内蒙古民族大学内蒙古通辽028000 华北理工大学基础医学院河北唐山063000

目的观察沙蓬粗寡糖(AOS)对糖尿病GK大鼠降血糖、改善胰岛素抵抗作用,探讨可能机制。方法将符合2型糖尿病GK大鼠随机分为模型对照组(mC)、格列苯脲组(GLB)、沙蓬粗寡糖高(AOS-H)、中(AOS-m)、低剂量组(AOS-L),以同源Wistar大鼠为正常对... 详细信息

目的观察沙蓬粗寡糖(AOS)对糖尿病GK大鼠降血糖、改善胰岛素抵抗作用,探讨可能机制。方法将符合2型糖尿病GK大鼠随机分为模型对照组(mC)、格列苯脲组(GLB)、沙蓬粗寡糖高(AOS-H)、中(AOS-m)、低剂量组(AOS-L),以同源Wistar大鼠为正常对照(NC)。各组均灌胃给药8周,测定给药前后空腹血糖(FBG)、随机血糖(RBG)、糖耐量(OGTT);给药8周测定非空腹非糖负荷状态的给药前后血糖及血清胰岛素含量变化;结束时测空腹血清血糖(FPG)、胰岛素(FINS)、OGTT,计算胰岛素抵抗指数(HOmA-IR);取胰腺常规石蜡包埋,HE染色,观察其病理组织形态改变。结果 AOS对GK大鼠空腹血糖影响不明显,但明显降低随机血糖,改善糖耐量,增加胰岛素敏感性,且明显减小AUC(P<0.01),以中剂量效果更好,与格列苯脲相似;AOS能促进胰岛素释放,以AOS中、低剂量促胰岛素释放作用更强,在释放时间和释放量上均早于和强于格列本脲;AOS可抑制GK大鼠胰岛组织病理改变,增加胰岛及胰岛细胞数量,与模型组比较,AOS给药组胰岛组织结构改变明显减轻。结论 AOS具有明显改善胰岛素抵抗和降低血糖作用,其机制可能是与快速促进胰岛素释放,增加胰岛细胞增值,改善胰岛功能有关。

关键词：沙蓬粗寡糖 2型糖尿病 GK大鼠胰岛素抵抗血糖