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71.
分析了H.26L中熵编码的原理和特点,比较了两种不同熵编码方法的优缺点、性能差异和发展方向,提出了一种基于量化参数QP的熵编码改进方法。实验证明这种方法能在信道传输率变化到一定程度时,动态调整熵编码的方法,使H.26L熵编码器在复杂度和编码效率两方面作出合理的权衡。 相似文献
72.
73.
S. Los 《Renewable Energy》1998,15(1-4)
The paper deals with a problem that has been crucial in teaching and practising architectural design since the XVIII century, when the separation between the Academies and the Polytechnics denied the integration between art and science in architectural design. The question becomes more crucial today with the demands arising from the energy saving, environmental awareness and sustainability achievements. An analysis is proposed for focusing the reasons of such a separation and some interventions are suggested in order to improve the efficiency of a design process that composes architectures by means of architectures. 相似文献
74.
Alexey N. Semenov Daniil A. Gvozdev Anastasia M. Moysenovich Dmitry V. Zlenko Evgenia Yu. Parshina Adil A. Baizhumanov Gleb S. Budylin Eugene G. Maksimov 《International journal of molecular sciences》2022,23(24)
Red blood cell (RBC) aggregation and deformation are governed by the molecular processes occurring on the membrane. Since several social important diseases are accompanied by alterations in RBC aggregation and deformability, it is important to develop a diagnostic parameter of RBC membrane structural integrity and stability. In this work, we propose membrane microviscosity assessed by time-resolved fluorescence anisotropy of the lipophilic PKH26 fluorescent probe as a diagnostic parameter. We measured the fluorescence decay curves of the PKH26 probe in the RBC membrane to establish the optimal parameters of the developed fluorescence assay. We observed a complex biphasic profile of the fluorescence anisotropy decay characterized by two correlation times corresponding to the rotational diffusion of free PKH26, and membrane-bounded molecules of the probe. The developed assay allowed us to estimate membrane microviscosity in the range of 100–500 cP depending on the temperature, which paves the way for assessing RBC membrane properties in clinical applications as predictors of blood microrheological abnormalities. 相似文献
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76.
Jan Louzil Jana Stikarova Dana Provaznikova Ingrid Hrachovinova Tereza Fenclova Jan Musil Martin Radek Jirina Kaufmanova Vera Geierova Eliska Ceznerova Peter Salaj Roman Kotlin 《International journal of molecular sciences》2022,23(22)
A single-center study was conducted on 120 patients with inherited disorders of primary hemostasis followed at our hematological center. These patients presented a variety of bleeding symptoms; however, they had no definitive diagnosis. Establishing a diagnosis has consequences for the investigation of probands in families and for treatment management; therefore, we aimed to improve the diagnosis rate in these patients by implementing advanced diagnostic methods. According to the accepted international guidelines at the time of study, we investigated platelet morphology, platelet function assay, light-transmission aggregometry, and flow cytometry. Using only these methods, we were unable to make a definitive diagnosis for most of our patients. However, next-generation sequencing (NGS), which was applied in 31 patients, allowed us to establish definitive diagnoses in six cases (variants in ANKRD26, ITGA2B, and F8) and helped us to identify suspected variants (NBEAL2, F2, BLOC1S6, AP3D1, GP1BB, ANO6, CD36, and ITGB3) and new suspected variants (GFI1B, FGA, GP1BA, and ITGA2B) in 11 patients. The role of NGS in patients with suspicious bleeding symptoms is growing and it changes the diagnostic algorithm. The greatest disadvantage of NGS, aside from the cost, is the occurrence of gene variants of uncertain significance. 相似文献
77.
采用树脂分离富集金矿和铜阳极泥中的Pd、Pt、Au,结合薄样技术,利用自制X射线荧光(XRF)能谱仪同时测定这3种元素。对3种型号树脂进行了选择,确定了Amberlyst A26树脂为分离树脂,并采用单因素法对Amberlyst A26树脂柱高、流速和盐酸浓度进行了优化,确定了最佳实验条件分别为柱高10 cm、流速3 mL/min和盐酸浓度0.2 mol/L。同时对XRF分析方法进行了方法学验证。XRF能谱仪采用Mo靶激发,新型SDD探测器,结合优化的薄样技术,基本消除基体效应,可用内标法定量;仪器检出限(LLD)Pd、Pt、Au分别为0.021、0.019、0.015 μg/mL,方法检出限(LDM)分别为 0.066、0.062、0.050 μg/mL;采用11种元素的混合标准测得RSD在1.6%~7.5%之间。所测金矿样品的结果与国标法结果一致,铜阳极泥的测定结果与ICP-MS法结果基本一致。 相似文献
78.
79.
Stabilization of -alumina phase by silica was studied in nanocomposite (diphasic) alumina-silica gels by XRD and BET surface areas measurements. Five wt.% of silica (22 nm particles) increased the crystallization temperature of to -alumina by about 100°C from boehmite (10 nm particles) derived alumina. Stabilization of -alumina was caused by the formation of intimate contact (Al-O-Si) between components by diffusion of silica into the defect alumina structure.Also with the Department of Agronomy. 相似文献
80.
Building and maintaining high quality knowledge based systems is not a trivial task. Decision tables have sometimes been recommended in this process, mainly in verification and validation. In this paper, however, it is shown how decision tables can also be used to generate, and not just to validate, knowledge bases and how the transformation process from decision tables to knowledge bases can be organized. Several options to generate rules or other knowledge representation from decision tables are described and evauluated.
The proposed generation strategy enables the knowledge engineer to concentrate on the acquisition and modelling issues and allows him to isolate the knowledge body from its implementation. The generation process has been implemented for two commercial tools, AionDS and KBMS and has been applied to real world applications. 相似文献