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Numerical Simulation of Soil Water and Salt Transport Based on Hydrus Model in the Storage Condition

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Numerical Simulation of Soil Water and Salt Transport Based ...

A QoE-based cell range expansion scheme in heterogeneous cellular networks

2011 International Symposium on Water Resource and Environmental Protection(ISWREP 2011)

作者： Chen Feng Jiancang Xie Bo Sun ni wang Institute of Water Conservancy and Hydroelectric Power Xi’an University of Technology

ISBN: (纸本)9781612843377

In order to reveal the discipline of water and salt transport in storage condition,Hydrus model is used to analyze numerical simulation of water and salt transport in storage condition,studied soil salinity migration of the arable layer in storage condition,compared the simulation results with the *** the cyclic pressure salt mechanism in storage condition,it related to water level and *** results showed that the water level raising,salinity concentration lowering,reduced the salt of soil surface,maked the soil salinity downward pressure salt from top to bottom;and the water level lowering,concentration increasing,salt transport to the soil saturated layer,while the salt of non-saturated layer desalinated *** the plough horizon to the good development.

关键词： hydrus model numerical simulation storage condition water and salt transport water-soil

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Science China(Information Sciences) 2015年第8期58卷 157-167页

作者： YUAN TingTing FEI Ze Song LI Na wang ni Wei XING Cheng Wen LIU Jia Kang School of Information Science and Engineering Beijing Institute of Technology The Research Institution of China Mobile

Deploying low-power nodes(LPNs) overlaid with Macro cells is a promising strategy to improve the coverage and capacity of cellular systems. Meanwhile, cell range expansion(CRE) scheme is proposed to select a proper serving base station(BS) for users between Macro e Node Bs and LPNs, and then offloading of traffic from Macro cell is made. In this paper, first, we introduce the LPNs deployment strategy and its activation criteria in the heterogeneous system. Then, a quality of experience(Qo E)-based CRE scheme to adjust the coverage area of LPNs adaptively is proposed. Different from the existing CRE schemes, the Qo E values for different users with different services are considered when the users try to select an appropriate serving BS. Finally, simulation results demonstrate that the proposed scheme can improve cell edge user experience for various services as well as overall system performance.

关键词： low power nodes heterogeneous networks cell range expansion quality of experience LTEadvanced

Randomized controlled study of the safety and efficacy of nitrous oxide-sedated endoscopic ultrasound-guided fine needle aspiration for digestive tract diseases

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World Journal of Gastroenterology 2016年第46期22卷 10242-10248页

作者： Cai-Xia wang Jian wang Yuan-Yuan Chen Jia-ni wang Xin Yu Feng Yang Si-Yu Sun Endoscopy Center Shengjing Hospital of China Medical University Endoscopic Center Liao Dongwan Branch Courts Shengjing Hospital of China Medical University

AIM To evaluate the efficacy and safety of nitrous oxidesedated endoscopic ultrasound-guided fine needle aspiration. METHODS Enrolled patients were divided randomly into an experimental group(inhalation of nitrous oxide) and a control group(inhalation of pure oxygen) and heart rate, blood oxygen saturation, blood pressure, electrocardiogram(ECG) changes, and the occurrence of complications were monitored and recorded. All patients and physicians completed satisfaction questionnaires about the examination and scored the process using a visual analog scale. RESULTS There was no significant difference in heart rate, blood oxygen saturation, blood pressure, ECG changes, or complication rate between the two groups of patients(P > 0.05). However, patient and physician satisfaction were both significantly higher in the nitrous oxide compared with the control group(P nitrous oxide-sedation is a safe and effective option for patients undergoing endoscopic ultrasound-guided fine needle aspiration.

关键词： Endoscopic ultrasonography nitrous oxide Sedation Fine needle aspiration

Theoretical Modeling and Surface Roughness Prediction of Microtextured Surfaces in Ultrasonic Vibration-Assisted Milling

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 163-183页

作者： Chenbing ni Junjie Zhu Youqiang wang Dejian Liu Xuezhao wang Lida Zhu School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266525China School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China

Textured surfaces with certain micro/nano structures have been proven to possess some advanced functions,such as reducing friction,improving wear and increasing *** prediction of micro/nano surface textures is of great significance for the design,fabrication and application of functional textured *** this paper,based on the kinematic analysis of cutter teeth,the discretization of ultrasonic machining process,transformation method of coordinate systems and the cubic spline data interpolation,an integrated theoretical model was established to characterize the distribution and geometric features of micro textures on the surfaces machined by different types of ultrasonic vibration-assisted milling(UVAM).Based on the theoretical model,the effect of key process parameters(vibration directions,vibration dimensions,cutting parameters and vibration parameters)on tool trajectories and microtextured surface morphology in UVAM is ***,the effect of phase difference on the elliptical shape in 2D/3D ultrasonic elliptical vibration-assisted milling(UEVAM)was *** to conventional numerical models,the method of the cubic spline data interpolation is applied to the simulation of microtextured surface morphology in UVAM,which is more suitable for characterizing the morphological features of microtextured surfaces than traditional methods due to the presence of numerous micro *** prediction of surface roughness indicates that the magnitude of ultrasonic amplitude in z-direction should be strictly limited in 1D rotary UVAM,2D and 3D UEVAM due to the unfavorable effect of axial ultrasonic vibration on the surface *** study can provide theoretical guidance for the design and fabrication of microtextured surfaces in UVAM.

关键词： Theoretical modeling Microtextured surface Ultrasonic vibration-assisted milling Cubic spline interpolation Surface roughness

基于改良版咳嗽评估问卷对慢性咳嗽病因诊断的简单决策树模型研究

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中国呼吸与危重监护杂志 2024年第3期23卷 178-184页

作者：贾林杰柏佳马佳琪倪望余慕清赵建平周敏华中科技大学同济医学院附属同济医院呼吸与危重症医学科湖北武汉430030 重庆市渝中区大坪医院心血管内科重庆400000

目的比较不同病因慢性咳嗽患者的临床表现,建立改良版咳嗽评估问卷和简单决策树模型提高病因诊断效能。方法收集同济医院呼吸与危重症医学科门诊2021年10月—2023年8月期间诊断明确的慢性咳嗽患者的临床资料,依据病因诊断将患者分为激... 详细信息

目的比较不同病因慢性咳嗽患者的临床表现,建立改良版咳嗽评估问卷和简单决策树模型提高病因诊断效能。方法收集同济医院呼吸与危重症医学科门诊2021年10月—2023年8月期间诊断明确的慢性咳嗽患者的临床资料,依据病因诊断将患者分为激素敏感性咳嗽(corticosteroid-responsive cough,CRC)、上气道咳嗽综合征(upper airway cough syndrome,UACS)和胃食管反流性咳嗽(gastroesophageal reflux-related cough,GERC)三组,各组患者均完成咳嗽问卷,探究咳嗽问卷各问题是否为慢性咳嗽病因的危险因素,统计分析后依据结果建立改良版咳嗽评估问卷(modified cough assessment test,MCET),并构建慢性咳嗽病因诊断与鉴别诊断的简单决策树模型。结果共纳入358例单一病因的慢性咳嗽患者,其中CRC组201例(56.1%)、UACS组125例(34.9%)、GERC组32例(8.94%)。问卷中问题“咳嗽伴有喘息或胸闷”[比值比(odds ratio,OR)=3.222,95%置信区间(confidential interval,CI)2.144~4.843,P<0.001]、“咳嗽呈现昼重夜轻”(OR=1.755,95%CI 1.264~2.435,P<0.001)以及“咳嗽伴有反酸烧心或消化不良”(OR=15.580,95%CI 5.894~41.184,P<0.001)分别是各组慢性咳嗽对应病因的独立危险因素。新建立的MCET对各组慢性咳嗽病因诊断的受试者操作特征曲线下面积分别为0.871、0.840和0.988,均优于中文版莱切斯特咳嗽问卷(0.792、0.766和0.913)和简易咳嗽程度评分表(Cough Evaluation Test,CET)(0.649、0.691和0.580),除CET诊断GERC外(P=0.134),均P<0.05。针对慢性咳嗽病因鉴别诊断建立的简单决策树模型的准确率为77.4%。结论基于改良版咳嗽评估问卷建立的简单决策树模型能够简单快速地鉴别慢性咳嗽病因,可作为提高门诊慢性咳嗽临床诊治效能的工具。

关键词：慢性咳嗽咳嗽问卷病因决策树

以学生为考官的教学法在神经查体教学中的应用

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继续医学教育 2024年第3期38卷 87-90页

作者：李宏福刘功禄董毅余昊倪旺浙江大学医学院附属第二医院神经内科浙江杭州310009

目的探讨以学生为考官的教学法在住院医师神经系统体格检查培训中的作用和价值。方法选择2021年2—10月在浙江大学医学院附属第二医院神经内科进行住院医师规范化培训的二年级和三年级住院医师96名,按1︰1比例进行随机分组,试验组采用... 详细信息

目的探讨以学生为考官的教学法在住院医师神经系统体格检查培训中的作用和价值。方法选择2021年2—10月在浙江大学医学院附属第二医院神经内科进行住院医师规范化培训的二年级和三年级住院医师96名,按1︰1比例进行随机分组,试验组采用以学生为考官的教学法,对照组采用传统教学方法。比较2组住培生出科考试神经查体的成绩及对教学方法的评价。结果试验组住培生出科成绩为(90.02±4.18)分,最低分为83.00分,最高分为96.00分;对照组平均为(85.15±5.85)分,其中最低分为68.00分,最高分为93.00分,统计结果显示试验组住培生的成绩高于对照组,差异有统计学意义(t=4.527,P<0.001);且对教学方法的评价优于对照组,尤其是在提高学习趣味性、理解查体重要性、有利于掌握操作要点和希望在其他操作中应用方面,差异均有统计学意义(P<0.05)。结论以学生为考官的教学法可以提高住培生的神经系统体格检查成绩,有利于其临床实践能力的培养。

关键词：以学生为考官传统教学住院医师神经查体教学评价临床实践

Axiomatisations, alternative formulation anddynamic processes for the maximal self-consistentvalue under multicriteria decision situations

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Journal of Control and Decision 2022年第1期9卷 13-22页

作者： Hui-Chuan Wei Ai-Tzu Li Wei-ni wang Yu-Hsien Liao Department of Adult and Continuing Education National Chung Cheng UniversityMinhsiungTaiwanChina Department of Applied Mathematics National Pingtung UniversityPingtungTaiwanChina

By considering multicriteria decision situations, we adopt excess functions to introduce alternativeformulation and related dynamic processes for the maximal self-consistent value. In orderto present the rationality, ... 详细信息

关键词： Excess function the maximal self-consistent value dynamic process

3907例儿童近视早期眼底改变在不同眼轴的分布及其人工智能量化监控指标

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临床眼科杂志 2024年第2期32卷 97-101页

作者：石一宁方严陈卓王妮左浩陕西省人民医院 710000 安徽理工大学第一附属医院淮南232007 西安医学院药学院陕西西安新城石一宁眼科诊所

目的采用人工智能技术对儿童近视早期眼底的微量变化进行定性、定量分析,结合相关眼生物参数,探索近视发展的内在规律,为儿童近视防控工作中的早期发现、及时监测、适时调整提供敏感指标。方法横断面研究。对3907例18岁以下门诊顺序就... 详细信息

目的采用人工智能技术对儿童近视早期眼底的微量变化进行定性、定量分析,结合相关眼生物参数,探索近视发展的内在规律,为儿童近视防控工作中的早期发现、及时监测、适时调整提供敏感指标。方法横断面研究。对3907例18岁以下门诊顺序就诊儿童的眼底及相关生物参数进行采集,并按年龄分为6组,眼轴分为8组。分别采用SW‐9000眼科光学生物测量仪、SW‐8800眼底照相机,OSE‐2800眼科光学相干断层扫描仪和EVisionAI依未眼底智能分析云平台。依据SHI’标准中国眼健康档案及诊断体系,每一位患者每次就诊均按设计流程进行11项+眼生物参数进行完整的数据采集。近视早期眼底指标依次有垂直杯/盘(C/D)比、豹纹状改变和弧形斑。采用SPSS 19.0(SPSS Inc,Chicago,IL,USA)进行统计,包括χ2分析、ANOVA方差分析和多元逐步线性回归分析。结果3907例18岁以下儿童中,男生55.8%,女生44.2%;右眼和左眼分别50%。就诊高峰为6~11岁(64%)。眼轴23.5~25.5 mm占总人数的53.5%。眼轴25.5 mm以上各组占16.9%。垂直C/D比0.4~0.5占77%(χ2检验,P=0.000);眼轴24.5 mm以下各组呈现1级或无豹纹状改变,弧形斑多为生理改变;眼轴24.5~25.5 mm组呈现4级豹纹状改变;眼轴24.5 mm以上各组主要表现为3级弧形斑,26.5 mm以上眼轴为4级弧形斑(P组间=0.000,P总=0.000,P相关性<0.002)。结论24.5 mm眼轴可作为学龄儿童近视防控的监测关键拐点,豹纹状改变0.1、弧形斑1 PD视为诊断指标,豹纹状改变0.04~0.09、弧形斑2/3 PD视为病理性改变前期或高危期诊断指标。

关键词：儿童近视初发近视眼轴眼生物参数人工智能

Resonances Characteristics of Parallel Plate Waveguide Cavities

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Journal of Electronic Science and Technology 2015年第2期13卷 122-129页

作者： Lin Chen Dan-ni wang Yi-Ming Zhu Yan Peng Shanghai Key Lab of Modern Optical System Engineering Research Center of Optical Instrument and SystemMinistry of EducationUniversity of Shanghai for Science and Technology

The influence of air gaps on the response of transmission for a transverse-electric mode parallel-plate waveguide（TE-PPWG） with a single cavity and double cavities has been studied experimentally. As the air gap is larger than the resonant wavelength of high order cavity mode in the single deep grooved waveguide, only the fundamental cavity mode can be excited and single resonance can be observed in the transmission spectrum. Based on above observations, a tunable multiband terahertz（THz）notch filter has been proposed and the variation of air gap has turned out to be an effective method to select the band number. Experimental data and simulated results verify this band number tunability. This mechanical control mechanism for electromagnetic induced transparency（EIT） will open a door to design the tunable THz devices.

关键词： resonant transparency excited waveguide tunable terahertz verify notch realization optics