Understanding the curve-polygon object

In this paper the new method of understanding of the curve-polygon object is presented. The method of understanding of the curve-polygon object is part of the research aimed at developing a shape understanding method able to perform complex visual tasks connected with visual thinking. The shape understanding method is implemented as the shape understanding system (SUS). Understanding includes, among others, obtaining the visual concept in process of the visual reasoning, naming and visual explanation by generation an object from a required class. In this paper generation of the object from the selected well defined class, the curve-polygon class, as well as assigning the visual object into one of the shape classes is presented. The generation of the visual objects is used in SUS during learning of the visual concept, explanatory process and self-correcting process. The visual object is assigned into one of the shape classes during the visual reasoning process. The visual reasoning, presented in this paper, in contrast to other forms of reasoning depends on the type of objects which are analysed. In this paper visual reasoning that assigns an object to the curve-polygon class is presented. The shape understanding system consists of different types of experts that perform different processing and reasoning tasks. The self-correcting expert, that implements the new method of testing and reasoning, is invoked to test ability of the system to understand the concept of the curve-polygon shape.     

Envelope modeling of renewable resource variability and capacity

To unify the analysis of both renewable and conventional fossil-fuel generating resources in electricity systems, we develop an envelope-based modeling method. Built on Network Calculus theory (NetCal) for deterministic queuing systems from the field of telecommunications engineering, this method characterizes the variability of electricity supply and demand by upper and lower envelopes and their respective Legendre conjugates. Differing from all other modeling methods, this method not only quantifies variability across different time scales, but also captures the intrinsic tradeoff between capacity and the corresponding Quality-of-Service (QoS) performance. In particular, the QoS measures represent matching/mismatching patterns between power supply and demand and provide an intuitive interpretation of the role of storage resources. The concept of QoS leads to two QoS-based capacity metrics – guaranteed capacity and best-effort capacity – whose conceptual and numerical properties are analyzed and compared against existing capacity metrics for validation purpose. As illustration, the proposed methods are applied to data from the California Independent System Operator (CAISO), which allows us to explicitly quantify the capacity contribution (via the notion of best-effort capacity) of wind during peak hours and its negative system impact at night, and demonstrates the positive capacity contribution of storage resources even though they are net energy consumer.     

Whole mirror duplication-random loss model and pattern avoiding permutations

In this paper we study the problem of the whole mirror duplication-random loss model in terms of pattern avoiding permutations. We prove that the class of permutations obtained with this model after a given number p of duplications of the identity is the class of permutations avoiding the alternating permutations of length p²+1. We also compute the number of duplications necessary and sufficient to obtain any permutation of length n. We provide two efficient algorithms to reconstitute a possible scenario of whole mirror duplications from identity to any permutation of length n. One of them uses the well-known binary reflected Gray code (Gray, 1953) [10]. Other relative models are also considered.     

低压小功率风力直驱笼型异步发电机的设计

分析应用于无线通信基站的风力发电机性能的特殊要求,结合实例给出异步风力发电机的设计指标;总结异步电机电动和发电2种工作状态下的异同点,对比异步电动机的设计程序,提出低压小功率风力直驱笼型异步发电机的设计方法;并运用电磁设计的计算机辅助软件MathCAD,验证了设计方法的合理性.     

发电系统短期可靠性评估方法

本文在计及发电机组可靠性短期行为的基础上，研究了发电系统短期可靠性的评估方法，并讨论了短期可靠性指标方法在电源运行调度计划中的应用。     

材料生热效应基础研究和作用机理的探讨

根据各种需要,要求材料在各种特定的环境温度下发生变化,产生热效应。根据材料的发热机理和生热条件的不同,经常利用的生热条件是吸收微波生热和在交变磁场作用下的磁致生热。本文综述了两种生热条件下材料热效应的研究现状和发展情况。     

利用绿色能源 推广燃气发电新技术

"济柴"牌190系列燃气发电机组是利用天然气、沼气、瓦斯等各种绿色能源作为燃料的发电机组。该系列发电机组具有技术指标先进、操作容易、维修方便、能适应各种恶劣环境、用途广泛等优点。本文概括介绍了"济柴"牌190系列燃气发电机组的技术特点、主要结构特征以及在燃气机市场的应用。     

风力发电在宝钢的应用探索

能源供应和环境保护是经济可持续发展的基本条件。风力资源是不消耗矿物资源,不产生任何污染的可再生能源。介绍了风力发电系统的简况和发展趋势,并从宝钢实际情况出发,提出了在宝钢厂区江堤一线开发风力发电的方案。     

一种范成加工高速凸轮的新方法

提出了一种用双重曲柄滑块机构范成加工高速凸轮的新方法,它不仅加工精度高、简便,而且具有性能优良的运动规律。这里还详细讨论了砂轮尺寸误差的补偿方法。     

用DELPHI编写基于WORD的工程技术文档自动生成系统

在各类工程设计和制造中,常常要编写各类工程技术文档。如设计说明书、工艺卡片等等,由于它们的格式往往比较单一,这正好非常容易用计算机根据计算结果自动生成。这里讨论用工程计算中常用的计算机语言Delphi编程实现计算机自动生成基于WORD的式各技术文档的方法。