一种高性能图形板的设计与实现

介绍了一种采用高性能嵌入式图形处理器、大容量双端口视频存储器、高性能查色表以及超大规模可编程逻辑器件设计的图形显示控制板的基本组成和工作原理。     

一种基于MPEG-2的立体视频编码中的视差匹配快速算法

高效，快速的视差匹配是立体视频处理中的一项关键技术。本文在分析立体图像序列的视差矢量与运动矢量之间的相关性的基础上，提出一种基于MPEG-2的立体视频编码中的视差匹配快速算法。实验结果表明，与全搜索法相比，在保证重建图像质量的前提下，快速算法能显著降低视差估计的计算复杂度。     

用热失重法确定水合粘土水分含量及存在形式

文章以蒙脱土为例，采用热失重法定性定量确定了水合粘土中结合水类型、界限及其相对含量，并与等温吸附法结果进行了对比。结果表明，用该方法得到的水合蒙脱土中各种水分的相对含量及总含水量与等温吸附实验结果相一致。热失重（25~250 ℃）分析结果表明，水合蒙脱土中水分子主要存在自由水、松散吸附结合水、紧密吸附水（强吸附结合水）3种状态，分别对应于25~75 ℃、75~120 ℃、120~230 ℃区间里的失水。从热失重（25~250 ℃）规律来看，仍存在两个明显的转折点p/ps=0.9、0.98，它们为粘土-水体系的两个特征湿度，前者为粘土表面强结合水与松散结合水（渗透结合水）之间的界限，后者为松散结合水与自由水之间的界限，这验证了等温吸附法确定的两个特征湿度及对粘土表面结合水界限划分的正确性。     

L520型智能中子仪测定农田土壤含水量的标定研究

通过对L520型智能中子仪测定农田土壤含水量的标定研究，在试验区草甸土类型的土壤中，在0～100cm的土层中得到了一条标定土壤含水量的回归直线，用此法测定土壤含水量较重量法快捷方便且误差小。     

Spatiotemporal aspects of jerky flow in Al–Mg alloys, in relation with the Mg content

The spatiotemporal aspects of the Portevin–Le Chatelier effect in Al–Mg alloys are investigated using direct observations of the sample surface with a digital camera. Optical measurements of the surface profile using a white light interferometer allow the estimation of the local strain and strain rate associated with the bands. The effect of Mg content on instability characteristics is analyzed. The reloading time is shown to depend on the Mg content only at the strain and strain rates where type C bands are observed.     

Crack Development in Individually Quick Frozen Cut and Peel Carrots

ABSTRACT:  Crack development during freezing (CDF) is one of the major challenges in individually quick frozen (IQF) cut and peel carrot processing. The effects of processing and freezer storage on crack development were examined on the cut and peel carrot variety, Sugarsnax. Carrot samples were removed from the major processing steps, the trans-slicer, the shaper, the blancher, and the dryer, and examined for crack development by measuring percentage cracked, crack morphology, total soluble solids, moisture levels, and membrane injury index immediately after processing. These parameters were also examined following 20 wk of standard freezer storage for cut and peels. Approximately 2% of nonprocessed carrots were cracked compared to 45% of carrots after the initial trans-slicing stage. As the processing continued, cracking decreased due to the removal of the outer epidermis to 16% of the finished product. This suggests that CDF was initiated at the 1st processing stage. Crack width and depth were 2.3 and 2.6 mm, respectively, at the trans-slicer stage and decreased to 1.1 and 1.8 mm at the end of the line. It was found that CDF was further exacerbated by freezer storage due to inefficient water removal at the dryer stage. Crack width and depth increased to 1.5 and 3.0 mm after 20 wk for freezer storage. Root size also played a role in CDF, suggesting that larger pieces are more susceptible to crack development. Total soluble solid concentrations did not play a role in crack formation during cut and peel processing.     

霍林河一号露天矿煤层灰分变化规律的研究

详细地论述了霍林河一号露天矿各煤层的灰分特征和同一煤层不同地段灰分的变化情况,揭示了各煤层灰分的变化规律,为露天开采提供了可靠的技术保证。     

A kinetic study on isothermal crystallization of palm oil by solid fat content measurements

Isothermal crystallization of plam oil was studied by means of differential scanning calorimetry (DSC) as well as by nuclear magnetic resonance spectrometry to monitor its solid fat content (SFC). The temperature of crystallization (Tc) varied from 0 to 30°C, depending on the method used. The plot of %SFC vs. time at 25°C was sigmoidal in shape. However, at lower temperatures, two consecutive curves were clearly visible. Results from DSC experiments showed the following interesting features. At each Tc, the crystals produced were of different compositions. From 0 to 8°C, the thermogram showed three peaks, with the first two peaks (I and II) sharp, and the third (III) rather broad. At elevated temperatures up to 20°C, peak II disappeared totally while peak III tended to shift toward peak I. Above 20°C, both peaks shifted downward to longer times. Peak I continued to be broadened, and then suddenly disappeared at Tc above 24°C. The melting thermograms of the crystals obtained above and below this cut-off point were distinctly different. Kinetic studies on isothermal crystallization based on the data of SFC measurements showed that the data fit well into the Avrami-Erofeev equation with n=3 over the first 70% of the crystallization.     

基于MPEG-4标准的VOD业务探讨

MPEG-4是动态图像专家组(MPEG)标准家庭中的一员，是国际化标准组织为多媒体通信制定的一种解决方案。介绍了MPEG-4支持的新功能和特点，并阐述了MPEG-4的关键技术，在此基础上对MPEG-4在视频点播业务中的应用问题进行了探讨。     

SDI接口数字监视设备的设计与实现

介绍了一种对SDV(串行数字视频)信号进行解码的设备设计方案，提出了该系统的总体构架，并对该系统的硬件设计、软件设计进行了全面的论述。设计的产品具有较高的性能价格比，已进入了推广阶段。