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番茄果实热导率测试装置参数实验（Optimization of the Parameters of Designed Apparatus for Determination of Thermal Conductivity of Tomato Fruits）
番茄 热导率 测试装置 操作参数
2009/11/3
微热探针法测试热导率系统已被广泛应用于食品材料热导率的测试中。但是，由于实验条件或实验设备的限制，基于理想的线热源瞬态模型测量原理得到的结果会产生某些测试误差。针对测试误差，从探针输入电压、加热时间和样品的径向尺寸等装置操作参数的选择着手，通过实验，得到装置系统测定中输入电压的最佳值为2.5～6.5V、加热时间最佳值为20～50s。最后通过实际测试，得到了番茄果实在不同成熟阶段的热导率变化规律。
基于加权模糊聚类的农田养分管理区划分（Determination of the Soil Nutrient Management Zones Based on Weighted Fuzzy Clustering）
精细农业 农田养分 加权模糊聚类
2009/11/3
将加权模糊聚类算法应用于管理区划分，权值的确定分别采用主成分分析法和变异系数法。在吉林省榆树市精细农业试验田获取土壤氮、磷、钾数据，应用本文提出的加权模糊聚类算法进行管理区划分,确定了试验区的管理分区数目,并与传统的模糊聚类方法进行了比较。结果表明，基于加权模糊聚类的管理分区更合理、更符合实际情况，该方法可用于指导精准施肥。
以稳定指标灵敏度确定发电机有功功率输出极限（Determination of Generator Active Power Output Limit by Stability Index Sensitivity）
暂态稳定性 轨迹分析法 稳定指标 轨迹灵敏度 有功功率输出极限
2010/8/17
轨迹灵敏度提供了将轨迹变化定量化的方法，可揭示由参数或初始条件的微小改变所导致的动态轨迹的变化程度，并能用来探究参数空间的轨迹特征。轨迹分析法是电力系统暂态稳定分析的有效方法，能定量给出反映稳定程度的稳定指标和不稳定指标。文章基于轨迹分析法和轨迹灵敏度提出了一种稳定指标灵敏度计算方法用于估计发电机有功功率输出极限。应用此方法进行了案例研究，把稳定指标灵敏度应用到IEEE-39母线系统，与相应的仿真...
DETERMINATION OF THERMAL CONDUCTIVITY IN FOUNDRY MOULD MIXTURES
thermal conductivity granularity of sand foundry sand
2009/10/23
For a thorough understanding of the behaviour of foundry mould mixtures, a good knowledge of thermal properties
of mould materials is needed. Laboratory determination of thermal conductivity of mould...
DETERMINATION OF DIAMETRAL ERROR USING FINITE ELEMENTS AND EXPERIMENTAL METHOD
turning diametral error laser distance sensor
2009/10/23
This study concerns experimental and numerical analysis on a one-sided bound workpiece on the lathe machine.
Cutting force creates deflection on workpiece while turning process is on. Deflection quan...
Determination of Spatial Variability of Monthly Rainfall in the Eastern Mediterranean Region Using Geostatistical Techniques
Geostatistics Monthly Rainfall Semivariogram Parameters Kriging Areal Rainfall
2009/10/14
The aim of this study was to determine the spatial variability of monthly rainfall and generate monthly point and areal rainfall series for the Eastern Mediterranean Region using geostatistical method...
RESEARCH NOTE ON A PARABOLIC HEAT-BALANCE INTEGRAL METHOD WITH UNSPECIFIED EXPONENT: AN ENTROPY GENERATION APPROACH IN OPTIMAL PROFILE DETERMINATION
heat-balance integral method parabolic profile unspecified exponent
2009/10/14
The heat-balance integral method of Goodman is studied with two simple 1-D heat conduction problems with prescribed temperature and flux boundary conditions. These classical problems with well known e...
A Mathematics Model For Determination of Heater and Cooler Dimensions of A Stirling Engine
Stirling Engine Heater and Cooler Finite Di erence Method
2009/10/14
In this study the dimensions of the heater and cooler of a Stirling engine are estimated by simulating the velocity and temperature fields in the heater and cooler using nite difference method. For a...
DETERMINATION OF THERMAL CONDUCTIVITY OF ROCKS SAMPLES USING FABRICATED EQUIPMENT
thermal conductivity thermal diffusivity specific heat
2009/10/14
The aim of the paper is to describe how inexpensive/simple physics equipment was fabricated and used in the determination of thermal conductivity of rock samples. We used the experimental techniques k...
Parameters Affecting the Determination of the Tunnel Threshold-Zone Luminance
Threshold-zone luminance Visual ability Duration time Perception probability Safe stopping
2009/10/14
In order to determine the level of the tunnel threshold-zone luminance, as series of visual experiments were conducted using a tunnel entrance simulator. For the experiments 110 observers were used. T...
Use of Stable Isotopes in the Determination of Groundwater Flow Direction and Case Studies
Groundwater Flow Direction Groundwater Oxygen-18 Deuterium
2009/10/14
Groundwater in the hydrological cycle, a valuable resource, is the main source of water for domestic consumption, agriculture and industry in many parts of the world. In this study, di erent from the ...
Experimental Determination of Thermal Condutivity of Various Milk and Vegetable Oil Products
Thermal Conductivity Value Milk Vegetable Oil
2009/10/13
Thermal conductivity values of various milk and vegetable oil products were determined over a temperature range of 25-75C. Thermal conductivity of milk samples having higher solid content were found...
One-Sided Single-Cell Technique for the Determination of Henry's Constant
Henry's constant solubility olive oil one-sided single-cell technique
2009/10/13
In this work it was shown that it is possible to determine Henry's constant for gases in non-volatile liquids by using the one-sided single-cell technique used in analysing di usion and adsorption in ...
Determination of Flood Inundated Areas Using RS Techniques in the Western Black Sea Region of Turkey
RS/GIS Flood NOAA/AVHRR Image Classification
2009/10/13
The remote sensing and geographic information systems are supplying new tools for flood inundation studies. RS/GIS techniques are used for the determination of the flood extent in the 20-21 May 1998 f...
THE VEINING STRUCTURE METHOD, THE FINITE ELEMENT METHOD IN THERMAL DEFORMATION DETERMINATION FOR THE MAIN SPINDLE AT NUMERICHAL CONTROL LATHES
finite element thermal deformation main spindle
2009/10/13
In the determination of the process accuracy on CNC lathe it is very important to know the thermal deformations. This article presents a new solution to obtain the thermal deformations at the principa...