Requirements-document-based prototyping of CARA software

Computer-aided prototyping evaluates and refines software requirements by defining requirements specifications, designing underlying compositional architecture, doing restricted real-time scheduling, and constructing a prototype by using reusable executable software components. This paper presents a case study of the Computer Assisted Resuscitation Algorithm (CARA) software for a casualty intravenous fluid infusion pump and explores the effectiveness of performing rapid prototyping with parallel conceptualization to expose requirements issues. Using a suite of prototyping tools, five different design model alternatives are generated based on the analysis of customer requirements documents. Further comparison is conducted with specific focus on a sample of comparative criteria: simplicity of design, safety aspects, requirements coverage, and enabling architecture. The case study demonstrates the usefulness of comparative rapid prototyping for revealing the omissions and discrepancies in the requirements document. The study also illustrates the efficiency of creating/modifying parallel models and reason for their complexity by using the tool suite. Additional enhancements for the prototyping suite are highlighted.     

Synchronous generator model identification and parameter estimation from operating data

A novel technique to estimate and model parameters of a 460-MVA large steam turbine generator from operating data is presented. First, data from small excitation disturbances are used to estimate linear model armature circuit and field winding parameters of the machine. Subsequently, for each set of steady state operating data, saturable inductances L/sub ds/ and L/sub qs/ are identified and modeled using nonlinear mapping functions-based estimators. Using the estimates of the armature circuit parameters, for each set of disturbance data collected at different operating conditions, the rotor body parameters of the generator are estimated using an output error method (OEM). The developed nonlinear models are validated with measurements not used in the estimation procedure.     

Trade openness and regional income spillovers in Brazil: A spatial econometric approach*

This paper employs a spatial Durbin growth model to estimate the impact of trade openness on regional per capita income in Brazil using a data set of 469 Brazilian micro‐regions over the period 2004–2007. We calculate the direct, indirect and cumulative impact on per capita income of trade openness and human capital in these micro‐regions. Results indicate that greater trade openness in a region promotes economic development locally, while exerting negative influence on per capita income of the neighbouring regions. Our findings also show that human capital has a positive – direct and indirect – impact on the economic development of Brazilian micro‐regions.     

Boron concentrations in selected foods from borate‐producing regions in Turkey

As part of a large‐scale programme to investigate the health effects of exposure to borate minerals in Turkey, boron concentrations in vegetables, fruits and some other foods were determined. From all borate‐producing regions of the country, 22 species of fruit, 17 species of vegetable, 12 species of cereal, legume and oilseed, three species of herbs and six types of other food were collected in 1999 and analysed for boron concentrations using the Azomethine H method. The results were compared with 37 types of food collected from areas well distant from the borate‐producing areas. The total number of samples evaluated was 420. Pistachio (67.0 mg kg^?1) had the highest concentration of boron, followed by grape leaf (60.48 mg kg^?1), sour cherry (57.03 mg kg^?1), quince (38.78 mg kg^?1), peach (34.49 mg kg^?1), grape (20.70 mg kg^?1), green beans (19.49 mg kg^?1), unripe peach (18.92 mg kg^?1) and parsley (10.24 mg kg^?1) from the borate‐producing regions. A large number of foods contained boron at higher concentrations than those reported in the literature, most probably due to the high boron content of these Turkish soils. According to the results of t‐tests, the area itself does not have a significant effect (p > 0.05) on boron concentration in all foods evaluated so far. Copyright © 2003 Society of Chemical Industry     

Methodology development for estimation of armature circuit andfield winding parameters of large utility generators

This paper presents a methodology to estimate armature circuit and field winding parameters of large utility generators using the synthetic data obtained by the machine natural abc frame of reference simulation. First, a one-machine infinite bus system including the machine and its excitation system is simulated in abc frame of reference by using parameters provided by the machine manufacturer. A proper data set required for estimation is collected by perturbing the field side of the machine in small amounts, The recursive maximum likelihood (RML) estimation technique is employed for the identification of armature circuit parameters. Subsequently, based on the estimates of armature circuit parameters, the field winding and some damper parameters are estimated using an output error estimation (OEM) technique. For each estimation case, the estimation performance is also validated with noise corrupted measurements. Even in case of remarkable noise corruption, the agreement between estimated and actual parameters is quite satisfactory     

10G隔板的引进与消化吸收

简述了引进10G隔板的背景及项目内容、技术攻关、产品性能及组装电池的试验结果。