959 resultados para Lw CCM


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软件通信体系结构(SoftwareCommunicationsArchitecture,简称SCA)已被软件无线电(SoftwareDefinedRadio,简称SDR)论坛采纳为嵌入式系统的标准通信软件结构。SCA提供了一种支持通信软件和硬件可移植、可配置、可扩充和可重用的软件平台,但作为构件框架时仍显不足,主要是缺乏明确的构件模型。在研究CORBA构件模型(CORBAComponentModel,简称CCM)基础上,提出了适用于SCA的轻量级(Lightweight,简称Lw)CORBA构件模型———LwCCM

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为了探讨蓝藻Anabaenasp .strainPCC71 2 0在外源无机碳浓度变化时 ,其光合作用对CO2 和HCO-3 的利用特性 ,制备了高CO2 适应细胞 (High CO2 growingcells ,HCG细胞 ) .Anabaenasp .strainPCC71 2 0HCG细胞的生长速率高于LCG细胞 (Low CO2 GrowingCells) ,即在空气中生长的细胞 .当HCG细胞从 5 %CO2 转移到空气中时 ,其碳酸酐酶活性升高 ;它对外源无机碳的表观光合作用亲合力明显提高 ,

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本文介绍了一种非接触式(LW-1型)机器人重复位姿精度检测系统.该系统采用电涡流传感器作为位置信息传感器.以这种传感器的检测性能为基础,研究设计了相应的传感器测量结构、数学模型和坐标变换求解方法,使系统技术指标及使用性能达到了检测机器人重复位姿精度的实用要求.该系统具有鲁棒性强、设计合理、结构简单、造价低廉等特点,可以满足我国现阶段在机器人学研究和机器人开发应用方面的需求

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This paper develops some theoretical and methodological considerations for the development of a critical competence model (CCM). The model is defined as a set of skills and knowledge functionally organized allowing measurable results with positive consequences for the strategic business objectives. The theoretical approaches of classical model of competences, the contemporary model of competencies and human competencies model were revised for the proposal development. implementation of the model includes 5 steps: 1) conducting a job analysis considering which dimensions or facets are subject to revision, 2) identify people with the opposite performance (the higher performance and lower performance); 3) identify critical incidents most relevant to the job position, 4) develop behavioral expectation scales (bes) and 5) validate BES obtained for experts in the field. As a final consideration, is determined that the competence models require accurate measurement. Approaches considering excessive theoreticism may cause the issue of competence become a fashion business with low or minimal impact, affecting its validity, reliability and deployment in organizations.

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Variations in lake area and depth reflect climatically induced changes in the water balance of overflowing as well as closed lakes. A new global data base of lake status has been assembled, and is used to compare two simulations for 6 ka (6000 yr ago) made with successive R15 versions of the NCAR Community Climate Model (CCM). Simulated water balance was expressed as anomalies of annual precipitation minus evaporation (P-E); observed water balance as anomalies of lake status. Comparisons were made visually, by comparing regional averages, and by a statistic that compares the signs of simulated P-E anomalies (smoothly interpolated to the lake sites) with the status anomalies. Both CCM0 and CCM1 showed enhanced Northern-Hemisphere monsoons at 6 ka. Both underestimated the effect, but CCM1 fitted the spatial patterns better. In the northern mid- and high-latitudes the two versions differed more, and fitted the data less satisfactorily. CCM1 performed better than CCM0 in North America and central Eurasia, but not in Europe. Both models (especially CCM0) simulated excessive aridity in interior Eurasia. The models were systematically wrong in the southern mid-latitudes. Problems may have been caused by inadequate treatment of changes in sea-surface conditions in both models. Palaeolake status data will continue to provide a benchmark for the evaluation of modelling improvements.

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In this paper, Bond Graphs are employed to develop a novel mathematical model of conventional switched-mode DC-DC converters valid for both continuous and discontinuous conduction modes. A unique causality bond graph model of hybrid models is suggested with the operation of the switch and the diode to be represented by a Modulated Transformer with a binary input and a resistor with fixed conductance causality. The operation of the diode is controlled using an if-then function within the model. The extracted hybrid model is implemented on a Boost and Buck converter with their operations to change from CCM to DCM and to return to CCM. The vector fields of the models show validity in a wide operation area and comparison with the simulation of the converters using PSPICE reveals high accuracy of the proposed model, with the Normalised Root Means Square Error and the Maximum Absolute Error remaining adequately low. The model is also experimentally tested on a Buck topology.

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zsgest. von I. Münz

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von Julius David am 21. November 1875

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gewürdigt von Abraham Hochmuth