The actuality and progress of whole sky infrared cloud remote sensing techniques

Clouds are crucial regulators of both weather and climate. Properties such as the amount,type,height,distribution and movement of them have an impact on the earth's radiation budget and the hydrological cycle,thus cloud observation is very important. The disadvantages of zenith pointing measuring instruments and whole sky visible imagers limit the application of them.A summary of the actuality and application of ground-based whole sky infrared cloud measuring instruments and analyses of the techniques of radiometric calibrations,removal of atmospheric emission and calculation of cloud cover,amount,type are conducted to promote the automatically observation of the whole sky. Fully considering whole sky infrared cloud sounding theories,techniques and applications,there are still a lot of studies on improving the properties of instruments,enhancing the techniques of cloud base height measurements and establishing instrumental cloud classification criterion before actual operations.     

Morphological investigations on the lips and cheeks of the goat (Capra hircus): A scanning electron and light microscopic study

The current study was done to provide comprehensive information on the anatomical features of the lips and cheeks of the goat by gross examination and morphometric analysis in addition to scanning electron microscope (SEM). Samples from 12 normal healthy adult goat's heads of both sexes were collected directly after slaughtering. The lips and cheeks were dissected, and specimens were collected for both light and SEM. The lips of goat were soft and mobile. The free border of both lips was characterized rostrally by the presence of labial projections. The number, size, and arrangement of labial projections differed in the upper and lower lips. On the other hand, the buccal papillae were arranged into 6–8 longitudinal rows parallel to the cheek teeth. The length of these papillae decreased caudally while they were absent on the most caudal part of the cheek. Presence of several types and shapes of labial projections and papillae, and buccal papillae suggest a high degree of mechanical adaptation of the lips and cheeks of the goat. This study provides baseline data for clinical studies. This study is the first report to shed light on the morphology of the lips and cheeks of the goat by gross and scanning electron microscopy.     

Pododermal angioarchitecture of the bovine claw in relation to form and function of the papillary body: a scanning electron microscopic study.

The region-specific angioarchitecture of the bovine pododerma was examined using systematic scanning electron microscopy of micro-corrosion casts of juvenile and adult bovine claws. Particular emphasis was laid on the demonstration of specialised vascular structures such as arteriovenous anastomoses. Comparing the results of main and dew claws, respectively, of juvenile and adult claws, a relation between burdening of the claw and density and differentiation of the pododermal papillary and lamellar blood vessels was detected. The results suggest a possible influence of body weight (or age) and weight-bearing on the formation and vascularisation of the pododermal papillary body. The lamellar and papillary microvascularisation and microcirculation are discussed.     

机械设计制造中机电一体化的应用研究

我国的科学技术飞速发展,在社会各个行业领域中均得到了广泛的普及和运用,机械设计制造业中加大了对机电一体化的探索和研究,提高了机械设计制造的整体水平和生产效率。机电一体化直接影响着机械制设计制造的综合水平和最终效率,实现了信息、机械、电子等技术的有机融合。本文对机械设计制造中运用机电一体化的优势进行了探讨,结合机械设计制造中机电一体化技术分析,提出了机械设计制造中机电一体化技术应用研究。     

基于FPGA的FTIR光谱仪采集系统的设计

为了满足人们对于食品药品安全检测快速便携的需要,团队设计一种高速便携,延时低、精度高的新型FTIR光谱仪。光谱采集系统分为上位机和下位机2部分,系统的上位机软件设计是采用跨平台的C++图形用户界面应用程序,该框架(QT Creator)是由编程实现的,下位机的光电部分采用了MEMS微镜使仪器小型化,而下位机采集部分控制主板使用了ZYBO。使用了DAC驱动动镜移动以及ADC用于参考光和样本光数据的同步采集,进而利用多个串口实现了与上位机的完成指令控制以及采集数据传输。低波特率串口用于接收上位机控制指令。2个高波特率串口发送FIFO缓存的光谱数据。经试验验证采集系统的ADC、DAC及UART的时序控制满足了高速高效的需求。但是在便携上可进一步提高,下一步考虑通过利用Linux将上位机部分移植ZYBO内。采集控制设计完全使用了verilog代码进行了仿真与实测,发挥了FPGA的灵活特性,利用例化法提高了采集速率。     

工业机械手运动学仿真

使用Pro/Engineer建立了工业水平多关节机械手3D模型,并使用Adams作为仿真工具,实际分析了机械手的运动学和动力学特征:介绍了机械手设计的过程与方法,取得了优化的3D设计参数,为3D建模与优化提供了一种实际方法.     

Semiautomated methods for cancellous bone histomorphometry using a general-purpose video image analysis system

Semiautomated methods are used to measure elongated, curved and complex branching profiles and isolated perimeter segments in monochrome video images with a general-purpose analysis system. These methods are used to make the major primary measurements of bone histomorphometry. Accuracy and reproducibility of the image acquisition, processing and measurement system is documented by measuring a semicircular standard of known dimensions. Semiautomated applications of the Ar/Le method for measuring areas and perimeters, and calculating lengths and widths of osteoid seams, lengths of mineralization labels and mineral apposition rate, wall width, indirect measurements of eroded, osteoclastic and osteoblastic perimeters without tracing, and measurement of mineralized or total cancellous bone area and perimeter gave values comparable to measurements of the same parameters by tracing or grid counting techniques with equal or better reproducibility and much greater efficiency. Intraindividual variation in measuring multiple bone biopsies was comparable to that reported with current standard methods. Major sources of variability for semiautomated methods were image magnification and selection of profile edges by thresholding, and sources of variability for manual methods are image magnification, numbers of orthogonal intercepts, tracing speed and accuracy of the algorithm used to measure traced pixels. Semiautomated methods are accurate, reproducible and rapid methods suitable for bone histomorphometry.     

基于毛细力的芯片微操作方法研究

提出一种基于毛细力的芯片微操作方法,可实现微芯片的精准拾取、释放以及与尺寸匹配的基底的高精度自对齐。开发可精确模拟液桥形态的双迭代算法,求解微芯片操作过程中的拾取力与释放力,深入研究基于毛细力的微芯片的拾取以及释放的机理以及必要条件。研究液滴体积、基底接触角对微芯片拾取力和释放力的影响。结果表明,拾取力和释放力均随液滴体积的增大而增大,释放力随基底接触角的减小而增大。进一步通过试验验证基于毛细力的芯片微操作方法的可行性,研究液滴体积对微芯片操作的影响,并统计微芯片操作的成功率。基于毛细力的微操作方法在软体机器人、微机电系统、可穿戴设备的集成等领域具有潜在应用。     

TRIZ在林木生物质粉碎机创新设计中的应用

文中系统全面地应用TR IZ理论进行了林木生物质高效精细粉碎机创新设计。在对实际问题分析的基础上,进行了系统功能分析及根本原因分析,通过技术矛盾定义和创新原理应用、物理矛盾定义和分离方法应用、物场模型建立和标准解法应用确定了粉碎机结构创新设计方案。     

HPLC及LC-MS技术在低聚糖检测中的应用

目的介绍HPLC以及LC-MS技术在低聚糖检测中的应用。方法对近十余年国内外发表的具有代表性的相关文章进行分析、整理和归纳。结果 HPLC可通过选用不同的分离模式、结合多种检测方法满足不同性质低聚糖的分离、分析、检测要求;HPLC和MS联用又将极大地提高分离分析效率。结论 HPLC及LC-MS技术具有灵敏度高、选择性好、应用范围广等优点,是目前低聚糖检测分析的主要方法;随着HPLC和LC-MS技术的日臻完善,它们在低聚糖检测分析中的应用将更为广泛。