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    Analysis of Distribution and Influencing Factors of Three-Nitrogen in Groundwater of the Liuxi River Basin by PANG Yuan, ZENG Hui, ZHANG Mingzhu, ZHUO Quanlong, GUO Zhengguo

    Published 2021-01-01
    “…Based on the monitoring data of 28 sampling points in the study area from 2012 to 2018,the distribution characteristics and influencing factors of groundwater three nitrogen in Liuxi River Basin were analyzed.The results showed that the mass concentrations of ammonia nitrogen,nitrate nitrogen and nitrite nitrogen in groundwater in the study area showed a downward trend with time,and the annual decreasing ranges were 0.220,0.120 and 0.001 mg/L,respectively;the mass concentrations of ammonia nitrogen and nitrate nitrogen in the middle reaches were 1.1 and 1.6 times higher than those in the lower reaches,respectively;the average mass concentrations of ammonia nitrogen,nitrate nitrogen and nitrite nitrogen in bedrock fissure water were 3.2,0.1 and 0.7 times of that in loose rock pore water,respectively;the correlation degree of ammonia nitrogen and pesticide and fertilizer application was greater,the correlation degree of nitrate nitrogen and nitrite nitrogen and waste water discharge was greater;and three-nitrogen was affected by rainfall to a certain extent,but the correlation was poor;ammonia nitrogen and nitrate nitrogen were closely related to the redox condition and runoff condition of groundwater.…”
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    Effects of Operating Conditions during Three-Layered Polymeric Balloon Catheter Extrusion by G. B. Jin, K. S. Wang, W. J. Hua, Y. F. Jin, P. Qin, J. Y. Bian, G. H. Dai, Q. Q. Zhang

    Published 2022-01-01
    “…The optimal combination of these three operating conditions has been achieved. It is found that pulling speed can significantly affect the diameters of the extruded balloon catheters. …”
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    Dynamics of groundwater drought in the Yellow River source area and its surface influences by Huiwu Zhang, Gang Liu, Jing He, Yue Hu

    Published 2025-08-01
    “…Unlike prior studies that mainly emphasized macro-level drivers, this research places greater focus on surface conditions influencing groundwater drought. These findings enhance understanding of hydrological mechanisms in fragile plateau regions and help identify high drought-risk areas for targeted management.…”
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    Analysis of Atmospheric Environment Characteristics and Radar Characteristics of Three Short-time Heavy Precipitation Cases under Different Influence Systems in Central Yunnan by Hong ZHOU, Ying MIN, Yanyan XU, Lijia NA, Hongwei YE

    Published 2024-02-01
    “…Based on conventional observation data, NCEP 1°×1° reanalysis data, hourly and 5min automatic station precipitation data, and CINRAD/CC Doppler radar data in Kunming, three short-time heavy precipitation cases under different influence systems during the main flood season of 2021 in central Yunnan are studied.The characteristics of precipitation, circulation pattern, atmospheric environment and structure, shape and evolution of radar echoes are compared and analyzed.The results show that the difference of the three short-time heavy precipitation cases is mainly due to the difference weather systems on 500 hPa.There are shear lines at 700 hPa, but the formation seasons are different.There are convergence lines or weak cold fronts on the ground.The environmental conditions of the three cases are consistent with those of other regions of China in terms of unstable stratification, water vapor near the ground and vertical wind shear, however, there are significant differences in the total precipitable water, CAPE, SWEAT index.The shape of convective echo includes dot echo, block echo, strip echo, flocculent echo and so on.Convective storm type can be divided into high-echo-centriod convective storm, low-echo-centriod convective storm and mixed-echo-centriod convective storm.Short-time heavy precipitation has a single stage of some convective storm type, also has several convective storm types appearing at the same time.CAPE and SWEAT index have a certain correlation with convective storm types.Strong echo profile is columnar structure or tower structure.35 dBz strong echo is grounded without overhang characteristics.Short-time heavy precipitation is mostly generated by long- time stagnant or slow-moving convective echo, some short-time heavy precipitation is also generated in the "train effect" of radar echoes.The duration of short-term heavy precipitation formed by monomer with short life cycle is mostly within 1h, but the duration of short-term heavy precipitation formed by monomer combination and repeated generation and extinction or "train effect" is usually 1~3 h.The instantaneous rain intensity produced by high-echo-centriod convective storm can reach more than 10 mm·(5min)-1, while the rainfall intensity produced by low-echo-centriod convective storm and mixed-echo-centriod convective storm can range from 3~10 mm·(5min)-1, and a few can reach more than 10 mm·(5min)-1.…”
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    Dynamic Modeling and Safety Analysis of Whole Three-Winch Traction System of Shipboard Aircraft by Guofang Nan, Ying Wang, Yihui Zhou, Haoyu Wang, Yao Li

    Published 2025-06-01
    “…This research is innovative in systematically exploring the dynamic safety behavior of a three-winch traction system operating under small-deck conditions and complex sea states. …”
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    Influence of Three-Dimensional Stress Field Variation on Fracture Evolution Characteristics of a Roof by Xuyang Shi, Zhaolin Li, Qingxiang Cai, Wei Zhou, Wenshuai Li

    Published 2020-01-01
    “…Excavation disturbance on the dynamic variation of the three-dimensional stress field is the main cause for the dynamic disasters of the surrounding rock mass of the roof. …”
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    A Numerical Investigation for the Effect of Environmental Conditions on the Bending Behaviour of Laminated Composites by Rabi Ezgi Bozkurt, Fatih Darıcık

    Published 2022-04-01
    “…Deformation of the FRCs models was simulated with three-point bending conditions and the effects of material properties varying with environmental conditions on the flexural analysis were investigated according to the Tsai-Wu criterion and the Puck criterion. …”
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    Calibration of force sensor mounted in tire tread block under rolling contact condition by Koga Ishido, Masami Matsubara, Takayuki Toyoshima, Tomonori Sakai, Akira Shibuya, Hiroshi Tachiya, Masahiro Higuchi

    Published 2025-08-01
    “…This study investigates a sensor calibration method for accurately measuring the three-axis contact forces of a single tread block using sensor-equipped tires. …”
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    The Influence of Saliva pH on the Fracture Resistance of Three Complete Denture Base Acrylic Resins by Juliana de Sá, Francisca Vieira, Carlos Manuel Aroso, Mónica Cardoso, José Manuel Mendes, António Sérgio Silva

    Published 2020-01-01
    “…This study aimed to evaluate the influence of oral pH on the fracture resistance of prosthetic bases made of three different heat-polymerizable acrylic resin brands: RS Vertex®, Triplex Hot®, and Megacryl®. …”
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    Effect of digital bite registration condition and scanner type on the accuracy of 3D printed occlusal splints by Amirtaher Mirmortazavi, Azam Sadat Madani, Sajjad Alipour Hedayatabad, Melika Hoseinzadeh

    Published 2025-06-01
    “…Objective: The present study aimed to evaluate the accuracy of occlusal splints created at different bite registration conditions using two intraoral scanners.Methods: Dental arches were mounted in the maximum intercuspation position and scanned using Trios 3 and Medit i700 scanners under three conditions: closed mouth position, and open bite to 4 mm with or without bite registration material. …”
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    Influence of the Upper Limb Motor Deficit on Functional Independence in Patients with Cerebral Palsy by Corina SPOREA, Dumitru FERECHIDE

    Published 2021-03-01
    “…The aim of this study was to identify the way the motor deficit at upper limb level – reflected by coordination disturbances and by the condition of the three fingered (tripod) grasp – influences the CP patient’s functional independence. …”
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    Epidemic status of echinococcosis, brucellosis, and tuberculosis among rural residents in three counties of Wuzhong City, Ningxia, China in 2023 by Yan Huo, Jing Tang, MiXue Guo, SiYu Hou, Wei Zhao

    Published 2025-05-01
    “…In 2023, a cross-sectional study was carried out to gain an in-depth understanding of the infection status and influencing factors of three common zoonoses (echinococcosis, brucellosis and tuberculosis) among rural residents in three counties/districts of Wuzhong City, Ningxia. …”
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