Determination of solid fat content (SFC) of binary fat blends and use of these data to predict SFC of selected ternary fat blends containing low-erucic rapeseed oil

Several oils and fats often used for the industrial preparation of European shortenings were blended in binary systems. The equilibrium (after 48 h at 15°C) solid fat contents (SFC; determined by pulsed NMR spectroscopy) were measured and plotted against blend composition. SFC of the blends resulted from the SFC of each fat for the considered temperature as well as the type of interaction existing between those fats (namely, ideal behavior, monotectic interaction, eutectic interaction, and so on). The type of relationship fitted was dependent on the kind of interaction: Linear relationships were found for total compatibility between fats, and polynomial-type (order 2) relationships were found for fats exhibiting incompatibility. Some corresponding ternary oils and fats blends were also prepared and analyzed. Selected relationships (regression equations of the fitted curves) obtained for binary blends were combined in order to calculate the SFC of the corresponding ternary blends. Experimental values were generally close to predicted ones. The representation of SFC as a function of composition is interesting as it allows one to determine rapidly and easily the type of molecular interaction between two fats and also to determine equations that can be combined to calculate easily the SFC of corresponding ternary blends crystallized in the same way with a good accuracy. The texture (hardness) of several binary and ternary blends was also measured. The combination of the results obtained for SFC with the results obtained for the hardness of binary blends allows the prediction of the hardness of a corresponding ternary blend under the same conditions.     

材质在室内设计中的情感体现

人们对室内空间的需求除功能需求外,逐渐往精神需求发展。而满足这种需求,关键在于对室内装饰材质的运用。不同的材质具有不同的性格,给予人不同的情感体验。正确的认识二者的关系,才能使材质在室内装饰设计中充分满足人们的情感需求,以便营造出更为舒适的室内环境。     

混合波原子和双边滤波的纹理图像滤波方法

为了更好地去除纹理图像中的噪声, 提出了一种新的混合波原子阈值的振荡纹理图像扩散模型; 利用扩散方程和图像滤波方法的理论联系, 给出了联合双边滤波的图像去噪算法; 最后, 利用峰值信噪比(PSNR)和结构相似度(SSIM)两个客观图像质量评价指标, 与目前流行的图像去噪方法(包括波原子阈值、双边滤波、高斯尺度混合(GSM), 以及非局部滤波(NLM))进行比较。 实验结果验证了新方法的有效性。     

基于形变模型的多视图三维人脸重建

本文提出了基于形变模型的多视图三维人脸重建方法,将人脸形变模型与同一人脸在不同视点下的多幅图像进行匹配,从而重建出具有较强真实感的三维人脸模型。本文将对基于形变模型的多视图三维人脸重建方法进行详细的阐述,并把实验结果与单视图重建出的三维人脸模型进行了对比,从而体现出多视图重建的优势所在。     

Mechanical Properties of Textured Alumina Made by High-Temperature Deformation

The mechanical properties of a textured alumina made by high-temperature deformation of normal-purity sintered alumina have been investigated. The textured alumina shows very high bending strength and extremely high fracture toughness. Fracture toughness of more than 10 MPa·m^1/2 was measured by the single-edge precracked beam method, and even using the single-edge V-notched beam method, toughness of over 8 MPa·m^1/2 was obtained. This high fracture toughness was attributed to a large number of aligned small platelike grains of the textured structure enhancing the grain bridging effect.     

基于概率神经网络的人群密度估计

研究图像在频域中的纹理特性,实现了在频域中的人群密度估计.首先,对视频的每一帧进行离散余弦变换(DCT),将视频图像的空域性质转化到频域中;其次,统计分析视频图像DCT变换矩阵的纹理特性,提取能描述不同密度等级的纹理描述子作为特征向量;最后,用提取出的特征向量训练概率神经网络,并进行人群密度等级估计.实验表明,该方法可以很好地进行密度估计,获得了较高识别效率.     

Hot-compression behavior of Al-1Mn-1Mg alloy

The hot-compression of Al-1Mn-1Mg (mass fraction, %) alloy sample was carried out on a Gleeble-1500 thermo-simulator at deformation temperatures from 320 to 400 ℃ and strain rates from 0.1 to 10 s-1 by total strain of 1.4. Microstructure and texture evolution of the hot-compressed alloy were investigated by optical microscopy and X-ray diffraction analysis, respectively. The results show that the relationship among flow stress σ, deformation temperature T and strain rate ε can be expressed in the form of βσ...     

Mechanical performance and texture characteristic of an IF steel containing Nb and Ti by double cold rolling

Single cold rolling and double cold rolling were applied to hot rolled strips with different reduction ratios. The evolutions of {100},{111} and Goss face texture during double rolling were investigated by comparing the orientation distribution function(ODF) of the double rolled sample with that of the single rolled one. The double cold rolling texture is characterized by a higher γ-texture and a lower α-texture,and the {111}<112> component is improved remarkably. Based on the TEM observation and mechanical...     

Experimental study on Ti+Nb bearing ultra-low carbon bake hardening sheet steel hot-rolled in the ferrite region

A Ti+Nb bearing ultra-low carbon bake hardening sheet steel hot-rolled in the conventional austenite region and in the ferrite region with lubrication was experimentally studied.Subsequent cold rolling and continuous annealing processes were also conducted.The results show that microstructures of ultra-low carbon bake hardening hot strips at room temperature are basically irregular polygonal ferrites.The yield strength,ultimate tensile strength,n value,and r value of the No.2 specimen hot-rolled in the ferr...     

胶结物对东营凹陷储层砂岩弹性特征的影响

储层岩石的地震弹性属性是进行油气储层勘探及动态监测的基础。系统选取东营凹陷古近系各层段砂岩样品250块（以沙河街组为主）,在模拟储层条件下利用脉冲穿透法测试样品的纵、横波速度。样品在纵波速度一泊松比交汇图中表现出两种主要变化趋势,分别对应泥质与钙质胶结物的影响;在每个变化趋势中随泥质含量与钙质胶结物含量的增加,岩石结构从颗粒所构成的骨架支撑逐渐表现为基质支撑,弹性波能量的传播也从通过颗粒接触边界转变为通过岩石基质传播,这是使砂岩样品测试结果表现出两种截然不同变化趋势的主要原因,为利用岩石物理特性从地震资料中提取岩石结构、沉积与成岩特征的信息提供了依据。