开放标准LSB3.0的深入剖析

LSB标准是最重要的开放标准之一。文中介绍了LSB3.0标准规范;基于LSB3.0的发行版组件;构建LSB3.0认证的应用程序;LSB3.0的标准认证,并以实际的例子详细讲解了如何使用LSB3.0的开发环境和测试工具。最后对LSB标准的前景作了展望。     

开放标准LSB3.0的深入剖析

LSB标准是最重要的开放标准之一。文中介绍了LSB3．0标准规范；基于LSK3．0的发行版组件；构建LSK3．0认证的应用程序；LSB3．0的标准认证，并以实际的例子详细讲解了如何使用LSK3．0的开发环境和测试工具。最后对LSB标准的前景作了展望。     

High temperature tensile properties of 316LN stainless steel investigated using automated ball indentation technique

Type 316LN stainless steel (SS) is the principal structural material for the components of sodium cooled fast reactors operating under elevated temperature conditions. In order to assess the degradation in strength of service exposed components using a small specimen testing technique such as automated ball indentation (ABI), it is necessary to carry out prior detailed ABI studies on the virgin material. In this investigation, the tensile behaviour of as-received 316LN SS were investigated at several temperatures in the range 298–973 K using ABI technique. The load-depth of indentation data measured from ABI tests was analyzed using semi-empirical relationships to obtain the tensile properties. The yield stress and the flow curves were determined by correlating ABI results with corresponding uniaxial tensile test results. Trend curve for tensile strength with temperature, as estimated from ABI tests, exhibited a plateau region in the temperature around 823 K, similar to uniaxial tensile tests. The variations of strength coefficient, strain hardening exponent, yield ratio, hardness and uniform ductility with temperature were evaluated from ABI tests. The ABI technique was found to estimate the influence of temperature on tensile properties sensitively.     

An investigation of the deformation mechanisms in sn5% sb alloy using tensile, creep and abi tests from ambient to 473k

Tensile, creep, and automated ball indentation (ABI) tests have been conducted to study deformation mechanisms in Sn5%Sb alloy between ambient and 473 K. A power law relationship was obtained between minimum creep rate and applied stress, with stress exponent,n=5 and activation energy,Q=12.6±1.1 kCal/ mole. At 473 K, a transition fromn=5 ton=3 was observed at low stresses. ABI tests showed a power law relationship between strain rate and ultimate tensile stress with values ofn=5 andQ=13.0±1.8 kCal/mole. Tensile results were in broad agreement with the creep and ABI data. A new deformation mechanism is proposed for then=5 region involving viscous glide of dislocations assisted by dislocation core diffusion.     

Comparison between current and future environmental satellite imagers on cloud classification using MODIS

Future Satellite Imagers are expected to improve current ones on environmental and meteorological applications. In this study, an automatic classification scheme using radiance measurements with a clustering method is applied in an attempt to compare the capability on cloud classification by different sensors: AVHRR/3, the current GOES-12 Imager, SEVIRI, VIIRS, and ABI. The MODIS cloud mask is used as the initial classification. The results are analyzed with the help of true color and RGB composite images as well as other information about surface and cloud types. Results indicate that the future sensors (ABI and VIIRS) provide much better overall cloud classification capabilities than their corresponding current sensors (the current GOES-12 Imager and AVHRR/3) from the two chosen demonstration cases. However, for a specific class, it is not always true that more spectral bands result in better classification. In order to optimally use the spectral information, it is necessary to determine which bands are more sensitive for a specific class. Spatial resolution and the signal-to-noise ratio (SNR) of satellite sensors can significantly affect the classification. The 2.13 μm band could be useful for thin low cloud detection and the 3.7 μm band is useful for fresh snow detection.     

解析开放标准LSB3.0

介绍了LSB3．0标准规范、基于LSB3．0的发行版组件，构建LSB3．0认证的应用程序．LSB3．0的标准认证、LSB3．0的开发环境和测试工具．最后阐述了LSB标准的意义并对其前景作了展望。     

Automated purification of dye terminator sequencing reactions: an approach to high-throughput capillary electrophoresis sequencing of large templates

Demands for higher quantity and quality of sequence data during genome sequencing projects have led to a need for completely automated reagent systems designed to isolate, process, and analyze DNA samples. While much attention has been given to methodologies aimed at increasing the throughput of sample preparation and reaction setup, purification of the products of sequencing reactions has received less scrutiny despite the profound influence that purification has on sequence quality. Commonly used and commercially available sequencing reaction cleanup methods are not optimal for purifying sequencing reactions generated from larger templates, including bacterial artificial chromosomes (BACs) and those generated by rolling circle amplification. Theoretically, these methods would not remove the original template since they only exclude small molecules and retain large molecules in the sample. If the large template remains in the purified sample, it could understandably interfere with electrokinetic injection and capillary performance. We demonstrate that the use of MagneSil^® paramagnetic particles (PMPs) to purify ABI PRISM^® BigDye^® sequencing reactions increases the quality and read length of sequences from large templates. The high-quality sequence data obtained by our procedure is independent of the size of template DNA used and can be completely automated on a variety of automated platforms.     

基于MTSAT卫星数据的云掩膜阈值算法

使用ABI Cloud Mask算法,结合多种基础的表数据,对MTSAT-1R卫星图像进行了云掩膜分类。将卫星图像中的像素成功分为了4类:"晴空""似晴空""似云""云"。实验结果表明,本掩膜计算方便,达到了进一步计算下一步数据的要求。     

ABA信号元件ABI1和AtGluRS间相互作用分析

利用酵母双杂交体系,研究拟南芥脱落酸(ABA)信号传导元件———蛋白磷酸酶ABI1与谷氨酸-tRNA合成酶AtGluRS间的相互作用.结果表明,在与AtGluRS发生相互作用时,ABI1C-端的第262-434位氨基酸是极为关键的接触位点,包含蛋白磷酸酶PP2C特征信号(FFGVYDGHG)的区域(122-262位氨基酸)可显著强化其相互作用.     

Anticipatory assistance-as-needed control algorithm for a multijoint upper limb robotic orthosis in physical neurorehabilitation

Robotic devices are becoming a popular alternative to the traditional physical therapy as a mean to enhance functional recovery after stroke; they offer more intensive practice opportunities without increasing time spent on supervision by the treating therapist. An ideal behavior for these systems would consist in emulating real therapists by providing anticipated force feedback to the patients in order to encourage and modulate neural plasticity. However, nowadays there are no systems able to work in an anticipatory fashion. For this reason, the authors propose an anticipatory assistance-as-needed control algorithm for a multijoint robotic orthosis to be used in physical ABI neurorehabilitation. This control algorithm, based on a dysfunctional-adapted biomechanical prediction subsystem, is able to avoid patient trajectory deviations by providing them with anticipatory force-feedback. The system has been validated by means of a robotic simulator.Obtained results demonstrate through simulations that the proposed assistance-as-needed control algorithm is able to provide anticipatory actuation to the patients, avoiding trajectory deviations and tending to minimize the degree of actuation. Thus, the main novelty and contribution of this work is the anticipatory nature of the proposed assistance-as-needed control algorithm, that breaks with the current robotic control strategies by not waiting for the trajectory deviations to take place. This new actuation paradigm avoids patient slacking and increases both participation and muscle activity in such a way that neural plasticity is encouraged and modulated to reinforce motor recovery.