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基于蓝牙技术的变量施肥机速度采集系统设计（Development of a Ground Speed Collecting System for the Variable Rate Fertilizer Machine Based on Bluetooth）
精确农业 变量施肥 速度采集
2009/12/28
设计了基于蓝牙技术的变量施肥机速度信号采集系统。该系统以光电编码器为测速传感器，ARM微处理器接收测速脉冲并计算出速度值，通过KC111适配器以蓝牙（无线）方式传送，蓝牙USB适配器接收速度信号后传送给变量施肥控制器，完成施肥机速度信号采集。试验结果表明该系统最大误差为2.92%，能够满足变量施肥精度要求，可以应用到变量施肥机测速系统中。
在线混药式变量喷雾系统设计与试验（Key Technology of Variable-rate Spraying System of Online Mixing Pesticide）
精细农业 变量喷雾 在线混药 流量计 流量控制阀
2009/12/28
为实现在线混药式变量喷雾技术，设计了药、水独立存放混药装置，差压式流量计，流量控制阀，以及相应的控制系统。应用该系统对药、水分别进行流量计量和对药流量控制，达到变量喷雾的目标。试验结果表明，流量计误差在±2.0%以内，药流量控制误差在±3.0%以内。
Purpose: In this paper, the effects of various process parameters of WEDM like pulse on time (TON), pulse off
time (TOFF), gap voltage (SV), peak current (IP), wire feed (WF) and wire tension (WT) ha...
Carburization process rate in production of synthetic cast iron
Casting Powder injection Carburizing
2009/12/3
Purpose: The main goal of the paper was to determine the possibility of synthetic cast iron production on base of steel and process scraps as well as the carburization effectiveness, realized with thr...
The effect of cooling rate on microstructure and mechanical properties of AC AlSi9Cu alloy
Aluminum alloys Cooling rate Thermal characteristics Secondary Dendrite Arm Spacing
2009/12/1
Purpose: In this work the effect of cooling rate on the size of the grains, SDAS, size of the β precipitation and
thermal characteristic results of AC AlSi9Cu cast alloy have been described. The soli...
变量穴施水穴播机的变量施水数学模型（Mathematic Models of Water Application for a Variable Rate Irrigating Hill-seeder）
穴施水穴播机 变量施水 数学模型
2009/11/3
根据变量穴施水穴播机使用要求，建立了最小施水量数学模型和电磁阀控制时间数学模型。在自行开发的变量穴施水穴播机上进行静态试验，通过改变水箱水量、施水时间，获得不同的施水量。分别采用回归分析和人工神经网络预测2种方法，研究了水箱水量、施水时间及施水量之间的关系，建立了电磁阀控制时间的数学模型。回归试验表明，在水箱水量处于满箱、半箱和1/8箱容积3种状态时，所对应的电磁阀控制时间线性回归模型的调整判定系...
含水果颗粒胶体溶液通电加热速度建模与工艺优化（Ohmic Heating Rate Model and Process Optimization for Colloidal Solution with Fruit Granules）
水果颗粒 胶体溶液 通电加热
2009/11/3
为研究含水晶梨颗粒亲水性胶体溶液通电加热过程中，颗粒尺寸、颗粒体积分数、CMC-Na体积分数、胶体溶液质量分数和柠檬酸质量分数五因素对通电加热速度的影响，采用五因素二次正交旋转组合设计试验进行回归分析，建立了加热速度数学模型，对影响加热速度的工艺参数进行了优化，得到影响通电加热速度的工艺参数从大到小依次为：胶体溶液质量分数、CMC-Na体积分数、柠檬酸质量分数、颗粒尺寸、颗粒体积分数；影响加热速度...
基于传感器的变量施肥机定位方法（Positioning Method of Variable Rate Fertilizer Applicator Based on Sensors）
变量施肥机 传感器 定位
2009/11/3
简述了一种应用传感器代替GPS的变量施肥机定位方法。控制器读取传感器的脉冲信号，计算施肥机的行走距离，由自动网格识别算法实现施肥机自动网格识别。本文给出了传感器测距累积误差校正方法以提高定位精度。对于垄长为40 m的网格，要使定位误差小于6%，累积误差应小于2.4 m。实验结果表明，经过校正，拖拉机行走距离为250 m的时候，光电编码器和接近开关传感器测距累积误差分别为2.32 m和2.34 m(...
Analysis of a strain rate field in cold formed material using the visioplasticity method
forward extrusion copper alloy visioplasticity strain rate
2009/10/23
In this paper the visioplasticity method is used to find the complete velocity and strain rate distributions from the experimental data, using the finite-difference method. The data about values of st...
THE EFECT OF COOLING RATE ON THE PROPERTIES OF ALLOYED CAST-IRON SIZING ROLL
alloyed grey cast iron sizing roll indefinite chill
2009/10/23
Directional heat transfer was investigated by temperature measurements in the casting and in the mould using
thermocouples. Measurements were performed in operating conditions during pouring, solidif...
Oxidation Rate of Sulphite on Decomposing Leaf Litter
Leaf Litter Scots Pine Sulphite Measurement Sulphite Oxidation
2009/10/14
Sulphite (SO2−3 ), the major solution product of SO2, has been shown to inhibit leaf litter decomposition at concentrations occurring in urban rainfall. The rate of oxidation of SO2−
3 on...
Effect of Material Parameters on Rate-Type Constitutive Equations in Accelerated Flow of Viscoelastic Fluids
Viscoelastic fluids Constitutive equations Accelerated flow Runge-Kutta
2009/10/14
The effect of material parameters on three rate-type constitutive equations (White-Metzner, Oldroyd 3-constant and Kopac-Arkol) used successfully according to the literature was investigated. The fl...
A QUICK, SIMPLIFIED APPROACH TO THE EVALUATION OF COMBUSTION RATE FROM AN INTERNAL COMBUSTION ENGINE INDICATOR DIAGRAM
internal combustion engine indicator diagram rate of heat release
2009/10/14
In this paper a simplified procedure of an internal combustion engine in-cylinder pressure record analysis has been presented. The method is very easy for programming and provides quick evaluation of ...
A NOVEL METHOD FOR ESTIMATING THE ENTROPY GENERATION RATE IN A HUMAN BODY
entropy generation human body surface area heat transfer
2009/10/14
The main objective of this study is to show a method for calculating entropy generation (SBgenB) in a human body under various environmental and physiological conditions. The SBgenB in a human body is...
THE MAIN NATURAL LOWS OF HIGH-RATE COAL PYROLYSIS
coal pyrolysis gasification kinetic constants
2009/10/13
The importance of coal pyrolysis studies for the development of energy technologies is evident, since pyrolysis is the first stage of any process of coal thermal conversion. In combustion, pyrolysis d...