摘要：The present paper has disseminated the design approach, project implementation, and economics of a nano-grid system. The deployment of the system is envisioned to acculturate the renewable technology into Indian society by field-on-laboratory demonstration (FOLD) and ''bridge the gaps between research, develop-ment, and *** system consists of a solar photovoltaic (PV)(2.4 kWp), a wind turbine (3.2 kWp), and a battery bank (400 Ah). Initially, a prefeasibility study is conducted using the well-established HOMER (hybrid optimization model for electric renewable) software developed by the National Renewable Energy Laboratory (NREL), USA. The feasibility study indicates that the optimal capacity for the nano-grid system consists of a 2.16 kWp solar PV, a 3 kWp wind turbine, a 1.44 kW inverter, and a 24 kWh battery bank. The total net present cost (TNPC) and cost of energy (COE) of the system are US$20789.85 and US$0.673/kWh,respectively. However, the hybrid system consisting of a 2.4 kWp of solar PV,a 3.2 kWp of wind turbine, a 3 kVA of inverter, and a 400 Ah of battery bank has been installed due to unavailability of system components of desired values and to enhance the reliability of the *** TNPC and COE of the system installed are found to be US$20073.63 and US$0,635/kWh, respectively and both costs are largely influenced by battery cost. Besides, this paper has illustrated the installation details of each component as well as of the system. Moreover, it has discussed the detailed cost breakup of the system. Furthermore, the performance of the system has been investigated and validated with the simulation results. It is observed that the power generated from the PV system is quite significant and is almost uniform over the year. Contrary to this, a trivial wind velocity prevails over the year apart from the month of April,May,and June,so does the power yield. This research demonstration provides a pathway for future planning of scaled-up hybrid

摘要：wind power is one of the most reliable renewable energy sources and internationally installed capacity is increasing radically every *** wind power has been favored by the public in general,the problem with the impact of wind turbine noise on people living in the vicinity of the turbines has been *** noise wind turbine design is becoming more and more important as noise is spreading more adverse effect of wind turbine to *** paper demonstrates the design of 10 kW class wind turbines,each of three blades,a rotor diameter 6.4 m,a rated rotating speed 200 r/min and a rated wind speed 10 m/*** optimized airfoil is dedicated for the 75% spanwise position because the dominant source of a wind turbine blade is trailing edge noise from the outer 25% of the *** computations are performed for incompressible flow and for Mach number at 0.145 and for Reynolds numbers at 1.02×106 with a lift performance,which is resistant to surface contamination and turbulence *** objectives in the design process are to reduce noise emission,while sustaining high aerodynamic *** broadband noise sources are predicted by semi-empirical formulas composed of the groundwork by Brooks et *** Lowson associated with typical wind turbine operation *** the airfoil redesign process,the aerodynamic performance is analyzed to reduce the wind turbine power *** results obtained from the design process show that the design method is capable of designing airfoils with reduced noise using a commercial 10 kW class wind turbine blade airfoil as a ***,the new optimized airfoil showing 2.9 dB reductions of total sound pressure level(SPL) and higher aerodynamic performance are achieved.

摘要：针对小型风力机叶片强度分析的特点,提出了一种梁单元与实体单元相结合的高效率的有限元建模方法。叶片工作部分具有相同的翼型,故按照各叶素截面定义相应梁截面,采用变截面梁单元建模;而叶根部分截面形状急剧变化,采用实体单元建模。分析计算结果与试验数据的比较,取得了较一致的结果,说明了该建模方法的合理性。自行设计了应用于风光互补路灯的小型风力机叶片,并分析其在额定风速下的受力与变形,验证了叶片在该工况下的安全性。

摘要：空间态势信息系统作为对空间信息的综合描述和表达显示,为各类空间活动的展开提供了基础的信息保障。根据面向服务体系架构的理念,采用面向对象和模块化的设计思想,设计并实现一种面向服务的空间态势信息系统。重点讨论了系统中涉及到的服务设计、数据管理与分发、场景显示与切换、目标添加与显示、场景加载与保存、二次开发预留接口等关键技术。实验表明,该系统满足面向服务体系架构的要求,实现了无缝集成和信息共享,同时其跨平台的特性,使系统具有一定的灵活性、适用性和易操作性。

摘要：Gone With the wind is a historical fiction novel with vivid descriptions of the Old South,the Civil War and the Recon *** is an incredibly well written book about the death of old civilization and the struggles to survive in the new *** is ultimately the story of one person,Scarlet O'*** is keeping on changing during the three periods of the novel—her girlhood,the period of the Civil War and the *** the analysis of the formation and changing of Scarlet’s characters,this paper will make a further elaboration on the Darwinian concept of"survival of the fittest"and feminism.

摘要：This study presents a decision-support tool for preliminary design of a horizontal wind turbine system. The function of this tool is to assist the various actors in making decisions about choices inherent to their activities in the field of wind energy. wind turbine cost and site characteristics are taken into account in the used models which are mainly based on the engineering knowledge. The present tool uses a constraint-modelling technique in combination with a CSP solver (numerical CSPs which are based on an arithmetic interval). In this way, it generates solutions and automatically performs the concept selection and costing of a given wind turbine. The data generated by the tool and required for decision making are: the quality index of solution (wind turbine), the amount of energy produced, the total cost of the wind turbine and the design variables which define the architecture of the wind turbine system. When applied to redesign a standard wind turbine in adequacy with a given site, the present tool proved both its ability to implement constraint modelling and its usefulness in conducting an appraisal.

摘要：wind power control technology is an important part of intelligent control in wind farms. By the automatic calculation and implementation of control strategy, problems such as imprecise of manual control scheduling, slow adjust rate, heavy workload, etc. have been solved. It can improve the capacity of wind power grid, and it also has the important meaning to the safe and stable operation of power grid. This paper introduces wind power control system from certain aspects such as control mode, control principle, and so on.

摘要：针对所需导航性能(RNP)飞行程序的虚拟现实验证问题,结合RNP飞行程序的特点重点解析了航线及RNP隧道的结构和计算方法。利用World wind三维地理信息系统的二次开发功能,提出了一种RNP飞行程序三维可视化及模拟飞行的方法,实现了高分辨率地理环境下飞行航迹、包容区隧道的三维可视化及动态的模拟飞行。最后利用该方法对典型的RNP飞行程序进行了仿真,结果表明该方法能够方便快速地完成RNP飞行程序三维仿真,可用于RNP飞行程序的设计及验证。

摘要：In the context of industrial competitiveness, taking into account the process design throughout the product life cycle is inevitable, from the expression of the need to recycle, the capitalization and knowledge management increasingly a target much sought after companies because of increased knowledge. Indeed, during the approval phase and use studies and scientific researches make have generated knowledge especially that concerning the reliability of system components. In this context, the capitalization and reuse of knowledge are necessary and have a particular interest in design and particularly in the preliminary design phase. Studies are already completed suggest a design process ranging from the need to solve the problem. At each phase of the process, structural characteristics are defined by the designer through the available knowledge already capitalized to make choice of component and their arrangement. This article proposes integrating the analysis of system reliability in this process. The objective is the use of knowledge in the vision safety and hazards of operating through the study of reliability and decision making for the selection of solution.

摘要：Over the course of the past decade, power generation based on wind energy has become a significant component in modern power systems, which has caused substantial increase in the wind power based research. As it is complicated to use a real wind turbine for laboratory purposes, development of a replica of a real wind turbine that can be connected and used indoors is imperative. This paper presents the design and development of a wind turbine simulator that operates on the typical power-speed characteristics of a wind turbine. First, the mathematical model of the wind turbine simulator is developed and the corresponding CAD simulations are carried out. Proposed hardware implementations involve a DC motor-DC generator set, a variable load and a control system based on PI controllers. It is a simple, low power and low cost design that can be easily connected to an AC system through an inverter.