搜索结果: 1-15 共查到“工学 longitudinal”相关记录31条 . 查询时间(0.105 秒)
Quantifying the mediating effect of body mass index on the relation between a Mediterranean diet and development of maternal pregnancy complications: the Australian Longitudinal Study on Women’s Health
Mediterranean diet body mass index gestational diabetes gestational hypertension mediation
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2018/12/13
Background: The contribution of body mass index (BMI) to the observed associations between dietary patterns and risk of gestational diabetes mellitus (GDM) and hypertensive disorders of pregnancy (HDP...
Greater diet quality is associated with more optimal glycemic control in a longitudinal study of youth with type 1 diabetes
continuous glucose monitoring diet quality glycemic control type 1 diabetes youth
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2018/12/3
Background: Despite the centrality of nutrition in the management of type 1 diabetes, the association of diet quality and macronutrient distribution with glycemic control is ambiguous.
Driver Dynamics and the Longitudinal Control Model
Driver Dynamics Longitudinal Control Model
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2014/10/22
Driver psychology is one of the most difficult phenomena to model in the realm of traffic flow theory because mathematics often cannot capture the human factors involved with driving a car. Over the p...
Longitudinal and transverse velocity scaling exponents from merging of the Vortex filament and Multifractal models
Longitudinal and transverse velocity scaling exponents merging of the Vortex filament Multifractal models Fluid Dynamics
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2012/4/20
We suggest a simple explanation of the difference between transverse and longitudinal scaling exponents observed in experiments and simulations. Based on the Vortex filament model and Multifractal con...
Widely-Tunable Continuous-Wave Single-Longitudinal- Mode Fiber Optical Parametric Oscillator
Nonlinear Optics fibers Nonlinear optics four-wave mixing
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2015/5/26
A continuous-wave fiber optical parametric oscillator with a tunability of 114 nm, a wavelength span of 143 nm and single-longitudinal-mode oscillation is demonstrated. The short-term linewidth of the...
Temperature Dependence of Ultrasonic Longitudinal Guided Wave Propagation in Long Range Steel Strands
steel strand ultrasonic guided waves mode temperature coefficient
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2011/8/4
Ultrasonic guided wave inspection is an effective non-destructive testing method which can be used for stress level evaluation in steel strands. Unfortunately the propagation velocity of ultrasonic gu...
车辆智能巡航控制纵向动力学参数快速辨识方法（A Fast Identification Method of Vehicle Longitudinal Dynamic Parameters for Intelligent Cruise Control）
车辆 智能巡航控制系统 纵向动力学参数 实验辨识
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2010/12/29
为快速、低成本地获取用于智能巡航控制（ICC）的车辆纵向动力学参数，提出了一种基于车辆纵向动力学模型的参数实验辨识方法。设计了车辆静止、空挡滑行、带挡滑行、稳态行车和空挡制动5种工况的道路实验以采集数据，设计卡尔曼滤波器对实验数据进行预处理，基于最小二乘方法辨识车辆纵向动力学参数：滚动阻力因数、风阻因数、节气门制动切换曲线、制动增益和发动机速度特性。使用由该方法辨识出的参数标定车辆纵向动力学模型，...
纵向表面粗糙度对滚子副乏油润滑性能的影响（Effects of Longitudinal Surface Roughness on the Lubricating Performance of Starved Roller EHL Contacts）
滚子副 粗糙度 乏油 润滑性能
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2010/12/28
对全膜及乏油条件下纵向粗糙度滚子副弹流润滑问题进行了求解。结果表明，滚子接触副中部与端部的润滑特性不同，由于端部效应的存在，其端部油膜厚度远低于中部。表面粗糙度会引起油膜厚度及压力的波动，在纯滚动条件下，油膜波动的波长等于粗糙度的波长，而幅值大于粗糙度的幅值。表面粗糙度会降低油膜厚度，尤其在乏油润滑条件下。供油膜厚越小，滚子接触副越容易乏油。在一定供油量下，表面粗糙度的幅值越大，波长越小，对滚子副...
Adomian decomposition method for dispersion phenomena arising in longitudinal dispersion of miscible fluid flow through porous media
Adomian Decomposition method Miscible fluid
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2010/11/25
In this paper a theoretical model is developed for the dispersion problem in porous media in which the flow is one dimensional and the average flow is unsteady. The Numerical Solution and graphical il...
Tunable Single-Longitudinal-Mode Fiber Optical Parametric Oscillator with Saturable-Absorber-Based Auto-Tracking Filter
Nonlinear optics fibers Parametric oscillators amplifiers
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2015/6/4
A tunable single-longitudinal-mode (SLM) fiber optical parametric oscillator is demonstrated by using a subring cavity and a fiber loop mirror incorporated with a saturable absorber. It can provide du...
纵轴流脱粒分离-清选试验台设计（Development on Test-bed of Longitudinal Axial Threshing-separating-cleaning Unit）
纵轴流 脱粒装置 清选装置 试验台
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2009/12/28
设计的纵轴流式脱粒分离〖CD*2〗清选试验台以切流与纵轴流组合式脱粒分离装置、风筛式清选装置为核心，采用可组合的模块化结构，工作部件结构和运动参数的调整简单、方便，可获得多个工况下脱粒分离、清选性能指标以及脱出物的分布规律。试验台以工控机和信号采集卡作为硬件控制系统的核心，采用VC++编写的测控软件系统可以对试验过程中工作部件的转速、频率、扭矩和功率等参数进行实时采集、显示、处理与分析，为纵轴流联...
Stable tunable single-longitudinal-mode semiconductor optical amplifier erbium-doped fiber ring lasers for 10 Gbps transmission over 50 km single-mode fiber
optical fiber transmission tunable fiber ring lasers erbium-doped fiber semiconductor optical amplifier single-longitudinal-mode saturable absorber
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2011/5/9
We demonstrate a stable and tunable single-longitudinal-mode SOA-EDF ring laser for high-speed
data transmission systems. The laser is constructed by incorporating an SOA into the EDF ring
cavity. T...
Longitudinal vibrations of mechanical systems with the transportation effect
Applied mechanics Longitudinal vibrations Multibody systems
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2009/12/14
Purpose: this thesis purpose is a new way of modelling systems working with high speeds of mechanisms. Systems are analyzed with taking into consideration the rotational movement and with criterions o...
The Evolution of an Information System for Managerial Use: a longitudinal study
Information System Managerial Use longitudinal study
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2009/12/7
The failure of many Information Systems (IS) designed for use by managers may be due to the fact that traditional IS methodologies were used in their development. In this paper we describe an organisa...
直流线路纵差保护算法的改进及仿真验证（Improvement and SimulationValidation of DC Line Longitudinal Differential Protection ）
直流输电 直流线路故障 纵差保护
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2010/8/17
介绍了天广、高肇、兴安直流输电系统所采用的直流线路纵差保护原理，并对上述工程中直流线路纵差保护逻辑的异同及与其他保护的协调配合关系进行了对比分析；通过对天广直流2005年发生的一例故障案例进行分析，对目前3回直流线路纵差保护存在的不足进行了研究，并提出了改进方案，仿真验证表明所提出的改进方案是有效的、可行的。