Flexible Layout Research Articles

PI CONTROLLER BASED OF MULTI-LEVEL UPQC USING DQ0 TRANSFORMATION TO IMPROVE POWER QUALITY IN DISTRBUTION SYSTEM

The aim of this paper is to improve power quality in the source side of distribution system using unified power quality conditioner (UPQC) by realization of cascaded multilevel inverter (MLI). The UPQC is an integration of series and shunt active power filters via common dc link which can mitigates various power quality issues like voltage sag, swell, harmonics, interruptions etc. The cascaded MLI offers low THD in the output waveform and flexible circuit layout. The sinusoidal pulse width modulation (SPWM) switching scheme is employed for better operation of MLI. The control mechanism of UPQC is derived from dq0 transformation which is simple in its design and gives better control characteristics. The PI controller can efficiently reduce the steady state error and this can be used in UPQC controller for better response. The regulation of source voltage in the distribution system using multilevel UPQC under nonlinear load condition is analyzed in MATLAB/SIMULINK environment.

업무생산성 영향요인의 남녀직원 간 차이에 관한 연구 - 교류 및 복지개념을 적용한 업무시설을 대상으로 -

This research investigated the factor influencing work productivity on each gender of employees in business facilities improved as a composite of cultural exchanges and welfare convenience. It was conducted to measure an user satisfaction in improved detail space of research area which was drawn as independent variables, individual job performance rate in efficiency and effectiveness as a dependent variables. The study by pls-regression showed that it was important for male employees to have spacial structure with flexible layouts, office equipments environment focusing on work itself, optimized space for collecting work-related information. On the other hand, for female employees it was having space where communicate freely and improving office environment more comfortable. However, The cafeteria, which provides meal and communication and day care center policy, which reduces burden of infant care, are appeared as common factors. This research has proved that male and female employees have different demands in space affecting work productivity. And it provide the foundation for new office design strategy.

Mechanical Performance of Mega Steel Frame-Prestressed Composite Bracing Structure

The mega structure has been widely studied and applied due to the clear force transferring way, good structural integrity and flexible layout of diverse building functions. Based on the structure of mega truss or mega frame, the research and application of the mega structure with many kinds of bracing structures become a hot topic in recent years. Mega steel frame-prestressed composite bracing structure with a rigid-flexible composite bracing system composed of rigid Λ-shape steel brace and inverted Λ-shape flexible cable is a new kind of mega structure and this composite bracing system is set up in the mega steel frame. By establishing the three-dimensional finite element model and considering the material and geometric nonlinearity, the structural performance under static load in whole process was analyzed and the energy dissipation as well as failure mode under earthquake is also investigated for this new system in this paper. The results indicate that the lateral deformation is mainly decided by horizontal load and the corresponding curve of lateral displacement has the characteristic of flexure mode as a whole, whereas the deflection of mega beam is mainly governed by vertical load and pretension of cables. The internal force equilibrium of composite brace is decided by vertical load and the degree of force unbalance is about 15% when the fluctuation of vertical load is 20%, but the change of anti-symmetric horizontal load has no effect on the internal force equilibrium. The composite braces not only help the mega beam to bear the vertical load but also greatly enhance the lateral stiffness of main structure and so the lateral stiffness of whole system is relatively uniform. Due to the TMD effects of substructure and additional dampers, the seismic energy is mainly dissipated by dampers and substructure and then the main structure is able to maintain elastic. The desired failure mode of MFPCBS under lateral loads is as follows: the web members of mega beam appear to yield at first, and then the braces between mega column limbs, Λ-shape rigid bracing truss, floor beams between mega column limbs and mega column limbs in order.

Experimental investigation of passive micromixers conceptual design using the layout optimization method

This paper presents an experimental investigation of the novel efficient passive micromixers conceptual design using the flexible layout optimization method. Utilizing the layout optimization method when designing passive micromixers results in decreased reliance on the experience and intuition of designers. The detailed layout of passive micromixers is obtained by solving a variational optimization problem, in which the manufacturability and periodicity of passive micromixers can be considered by adding the corresponding design constraints. The obtained micromixers are fabricated by using polydimethylsiloxane soft photolithography techniques. The mixing performance is evaluated by stereoscopic and confocal microscopes. The effectiveness of the layout optimization method is confirmed by a comparison of the numerical and experimental results.

CosmicAI: 素早い検索・画像合成と作品共有による効率的な空の画像生成

We propose a novel system, called CosmicAI, for providing an intuitive and efficient way to synthesize 2D sky images. The system utilizes a collection of high-quality proprietary sky part images for backgrounds, clouds, and the moon, and allows the users to generate their own sky images effectively through attribute-based retrieval of these sky parts images and their flexible layout and natural composition based on a new cloud extraction algorithm and an original filter for partly-overlapping pixels. Its one click search and active composition play an important role for realizing rapid image synthesis. Moreover, CosmicAI is capable of collecting via the Internet and searching for composite works. This function promotes group works by giving incentives to users with unclear design motives for generating a wide variety of sky images.

ZigBee技术无线瓦斯报警系统的设计与实现

瓦斯泄露的检测与报警是煤矿开采安全生产中的重点监控对象。本文使用ZigBee无线通信模块组网技术和MQ-5的瓦斯浓度探测传感器与温湿度传感器设计并实现了无线瓦斯浓度报警系统。本无线瓦斯报警器系统，能够起到多节点瓦斯浓度采集、自动组网、远距离报警的作用。与传统的单点矿井瓦斯报警器相比，本报警系统使用电池供电具有布置灵活、低功耗、测量采集精度高、容灾性高等特点，可应用于煤炭井下开采的瓦斯浓度监控，可大大降低煤矿瓦斯爆炸的安全隐患。 The gas leak detection and alarm is the most important coal mining safety production supervision and control object. This article uses the ZigBee wireless networking technology of communication module and MQ-5 gas concentration detection sensor with temperature and humidity sensors, designs and implements the wireless gas concentration alarm system. The wireless gas concentration alarm system can play multi-node capture, automatic networking and remote alarm roles. Compared with the traditional single-point mine gas alarm, the alarm system has the characteristics such as flexible layout, low power consumption, high accuracy measurement acquisition, disaster tolerance and so on. It can be applied to the gas concentration monitoring in the coal mine and can greatly reduce the gas explosion.

A distributed multi-agent production planning and scheduling framework for mobile robots

Inspired by the new achievements in mobile robotics having as a result mobile robots able to execute different production tasks, we consider a factory producing a set of distinct products via or with the additional help of mobile robots. This particularly flexible layout requires the definition and the solution of a complex planning and scheduling problem. In order to minimize production costs, dynamic determination of the number of robots for each production task and the individual robot allocation are needed. We propose a solution in terms of a two-level decentralized Multi-Agent System (MAS) framework: at the first, production planning level, agents are tasks which compete for robots (resources at this level); at the second, scheduling level, agents are robots which reallocate themselves among different tasks to satisfy the requests coming from the first level. An iterative auction based negotiation protocol is used at the first level while the second level solves a Multi-Robot Task Allocation (MRTA) problem through a distributed version of the Hungarian Method. A comparison of the results with a centralized approach is presented.

A flexible layout design method for passive micromixers

This paper discusses a flexible layout design method of passive micromixers based on the topology optimization of fluidic flows. Being different from the trial and error method, this method obtains the detailed layout of a passive micromixer according to the desired mixing performance by solving a topology optimization problem. Therefore, the dependence on the experience of the designer is weaken, when this method is used to design a passive micromixer with acceptable mixing performance. Several design disciplines for the passive micromixers are considered to demonstrate the flexibility of the layout design method for passive micromixers. These design disciplines include the approximation of the real 3D micromixer, the manufacturing feasibility, the spacial periodic design, and effects of the Péclet number and Reynolds number on the designs obtained by this layout design method. The capability of this design method is validated by several comparisons performed between the obtained layouts and the optimized designs in the recently published literatures, where the values of the mixing measurement is improved up to 40.4% for one cycle of the micromixer.

Optimal Design of Steel Structure Residential Buildings in Xinjiang Region

There are a long winter and a short outdoor construction period in Xinjiang, being an earthquake-prone area. Therefore, it is particularly suitable for the development of steel structure residential buildings. This article explains the current problems in the design of steel structure residential buildings in Xinjiang region. For example, the backward concept of design, the random design of kitchen and bathroom, which leads to too many specifications, being not conducive to industrial production and large amount of steel using , etc. The optimal design ideas were put forward, which included architectural specialty to be dominant, standardized and conventionalized design, serialized, modular and flexible layout. Finally, an example of optimal design was given.

커피전문점의 실내디자인 요소 변화에 따른 공간 만족도 분석

This study investigates the effects of interior design elements on the satisfaction and preference for space. Field measurements and surveys were conducted in three coffeeshops where various interior design elements were applied. Results indicate that movable tables and chairs for two people were preferred in the space. They need to be placed flexibly according to the visitors' needs to improve satisfaction for convenience. To improve spatial satisfaction, the brightness of color applied to wall surfaces was recommended to be lower than that of color used for floor surfaces. The surfaces of space and interior design elements such as furniture also need to be kept clean. Lamps with lower color temperature were effective to enhance spatial satisfaction. Light sources should be shielded when a pendant lighting system with general diffuse type was used in space. Natural daylight through window was also required for better satisfaction level. Multiple linear regression implied that the cozy feeling by electric light, existence of daylight, flexible layouts for tables and chairs, color and quality of material for tables and floor were significant contributors to overall spatial satisfaction.

Visual aspect in concert hall design - recent trend

The visual aspect has become much more important in concert hall design. The New World Symphony opened a new concert hall in Miami in early 2011, expressing a multimedia visual concept where five large walls of the auditorium are used as screens for a multitude of projectors. A flexible layout for both musicians and the audience is enabled by a movable stage and audience areas. Musicians located away from Miami Beach collaborate with resident musicians through the use of the high-speed Internet2 network. Concerts in the Performance Hall are also served simultaneously to an audience outside the building in the adjacent city park with high-definition audio and video. Experimental collaboration between music and visual images is a key function of the building. The acoustics and acoustical design of this “visual” concert hall are discussed.

Automatic Gas Meter Reading System Based on Wireless Sensor Network

In view of the current status and shortcomings of existing meter reading systems, in this paper, we proposed an automatic gas meter reading system based on the advantages of gas meter directly reading technology, WSN technology and GPRS technology, introduced the whole scheme and the design of hardware and software in detail. The system is consist of three level network. The first level network and the second level network use the different frequency during communication. It decreases the interface of each other during the translation of the data, and increase the lifetime of the smart gas meter. The system has the advantages of easy construct, flexible layout, lower power consumption

Personalized multi-user view and content synchronization and retrieval in real-time mobile social software applications

Past years have witnessed the rapid growth of computer-based social software. Despite the increasing popularity of mobile devices, the choices of social software on these devices are still limited to non-real-time email and social media systems. Real-time social software on mobile devices is virtually non-existent due to the device characteristics such as small screen real estate, limited battery talk time, scarce network resources, and inherent need for personalization, which present challenges to the design and implementation of effective and useful real-time mobile social software. In this article, we present a technical solution to these challenges using a smartphone-based real-time collaborative note-taking system as an example. The solution allows for personalized multi-user view through flexible layout of multiple windows, maximally utilizing the available screen real estate, personalized content synchronization through synchronization protocols and algorithms based on the operational transformation technique and a buffer compression algorithm based on the operational merging technique, maximally utilizing the available battery talk time and network resources, and personalized content retrieval through customizable search methods.

A Study on Spatial Forms Characteristic of the Historic Towns in Yuan River Basin

The historic towns in Yuan River basin, with the same origin in water and mountain, has similar geographical environment, interlinked regional economy and inclusive multi-ethnic culture, all of which have a large contribution to both similarities and differences of the space forming of the historic towns. The space form respects for nature with the flexible layout and embodies the leading role of the water transport economy for space form of ancient town. The towns have Similarity of space form elements, convergence of space combinations, ecological of spatial layout and other features. At the same time, diverse types of spatial forms showed peoples wisdom and courage of adapting to nature and working out measures to suit local conditions in Yuan River basin. All these previous experiences supply valuable experience for construction of the small historic town in the present.

FNV: light-weight flash-based network and pathway viewer

Network diagrams are commonly used to visualize biochemical pathways by displaying the relationships between genes, proteins, mRNAs, microRNAs, metabolites, regulatory DNA elements, diseases, viruses and drugs. While there are several currently available web-based pathway viewers, there is still room for improvement. To this end, we have developed a flash-based network viewer (FNV) for the visualization of small to moderately sized biological networks and pathways. Written in Adobe ActionScript 3.0, the viewer accepts simple Extensible Markup Language (XML) formatted input files to display pathways in vector graphics on any web-page providing flexible layout options, interactivity with the user through tool tips, hyperlinks and the ability to rearrange nodes on the screen. FNV was utilized as a component in several web-based systems, namely Genes2Networks, Lists2Networks, KEA, ChEA and PathwayGenerator. In addition, FVN can be used to embed pathways inside pdf files for the communication of pathways in soft publication materials. FNV is available for use and download along with the supporting documentation and sample networks at http://www.maayanlab.net/FNV. avi.maayan@mssm.edu.

Using Data Envelopment Analysis and TOPSIS method for solving flexible bay structure layout

Unlike the classic methods for solving the facility layout problem (FLP) as a single objective form, there are some approaches with multiple objectives, for example which is discussed in approaches contain less than 50 percentage of whole operating costs in an organization. During the 4 decades researchers have been proposed different criteria and methods for solving layout problem. Recently one of the approaches for solving FLP was Data Envelopment Analysis (DEA). Proposed approach use2-opt algorithm beside DEA in a iterative Process for finding the most efficient layout, Such that 2-opt algorithm in each stage with using previous stage layout, generate layout alternatives, finally we used TOPSIS method for testing DEA result by ranking the best answer of each DEA iteration answer. The proposed algorithm has been illustration by a numerical example and result show the goodness of the proposed approach.

A Novel Power Divider Design With Enhanced Spurious Suppression and Simple Structure

This paper presents a novel design of a microwave power divider with enhanced spurious suppression. The proposed circuit features simple implementation with moderate line impedance, flexible layout design, and extended stopband bandwidth with three controllable transmission zeros. Moreover, explicit closed-form expressions are available for the evaluation of circuit parameters. For verification, the simulated and measured results of a 1-GHz power divider implemented on microstrip are shown.

RF model of flexible microwave single-crystalline silicon nanomembrane PIN diodes on plastic substrate

This paper reports the realization and RF modeling of flexible microwave P-type-Intrinsic-N-type (PIN) diodes using transferrable single-crystalline Si nanomembranes (SiNMs) that are monolithically integrated on low-cost, flexible plastic substrates. With high-energy, high-dose ion implantation and high-temperature annealing before nanomembrane release and transfer process, the parasitic parameters (i.e. resistance, inductance, etc.) are effectively reduced, and the flexible PIN diodes achieve good high-frequency response. With consideration of the flexible device fabrication, structure and layout configuration, a RF model of the microwave single-crystalline Si nanomembrane PIN diodes on plastic substrate is presented. The RF/microwave equivalent circuit model achieves good agreement with the experimental results of the single-crystalline SiNM PIN diodes with different diode areas, and reveals the most influential factors to flexible diode characteristics. The study provides guidelines for properly designing and using single-crystalline SiNMs for flexible RF/microwave diodes and demonstrates the great possibility of flexible monolithic microwave integrated systems.

A Novel Power-Divider Design With Unequal Power-Dividing Ratio and Simple Layout

This paper presents the design of a novel power-divider circuit with an unequal power-dividing ratio. Unlike the conventional approaches, the characteristic impedance values of all the branch lines involved are independent of the dividing ratio. The electrical lengths of the line sections are the only circuit parameters to be adjusted. Moreover, the proposed structure does not require impedance transformers at the two output ports. By the introduction of a transmission line between one of the output ports and the isolation resistor, a flexible layout design with reduced parasitic coupling is achieved. For verification, the measured results of a 2 : 1 and a 4 : 1 power-divider circuits operating at 1 GHz are given. A relative bandwidth of over 20% is obtained based on a return loss and port isolation requirement of -20 dB.

Hybrid Simulation Facility Based on Commercial 100 kWe Micro Gas Turbine

A new high temperature fuel cell-micro gas turbine physical emulator has been designed and installed in the framework of the European Integrated Project “FELICITAS” at the Thermochemical Power Group (TPG) laboratory located at Savona. The test rig is based on a commercial 100 kWe recuperated micro gas turbine (mGT) (Turbec T100) modified to be connected to a modular volume designed for physical emulation of fuel cell stack influence. The test rig has been developed starting with a complete theoretical analysis of the micro gas turbine design and off-design performance and with the definition of the more flexible layout to be used for different hybrid system (molten carbonate fuel cell or solid oxide fuel cell) emulation. The layout of the system (connecting pipes, valves, and instrumentation, in particular mass flow meter locations) has been carefully designed, and is presented in detail in this paper. Particular attention has been focused on the viscous pressure loss minimization: (i) to reduce the unbalance between compressor and expander, (ii) to maintain a high measurement precision, and (iii) to have an effective plant flexibility. Moreover, the volume used to emulate the cell stack has been designed to be strongly modular (different from a similar system developed by U.S. Department Of Energy-National Energy Technology Laboratory) to allow different volume size influence on the mGT rig to be easily tested. The modular high temperature volume has been designed using a computational fluid dynamics (CFD) commercial tool (FLUENT). The CFD analysis was used (i) to reach a high level of uniformity in the flow distribution inside the volume, (ii) to have a velocity field (m/s) similar to the one existing inside the emulated cell stack, and (iii) to minimize (as possible) the pressure losses. The volume insulation will also allow to consider a strong thermal capacity effect during the tests. This paper reports the experimental results of several tests carried out on the rig (using the mGT at electrical stand-alone conditions with the machine control system operating at constant rotational speed) at different load values and at both steady-state and transient conditions.