Comparison of Two Simulation Software for Modeling a Construction Process

2011 ◽  
Author(s):  
Amin Nikakhtar ◽  
Kuan Yew Wong ◽  
Mohammad Hossein Zarei ◽  
Ashkan Memari
Keyword(s):  
Simulation Software ◽  
Construction Process

The Applicable Development of Steel-Construction Process Dynamic Visual Simulation Software

2014 ◽  
Vol 501-504 ◽  
pp. 2567-2570
Author(s):  
Hua Jiang ◽  
Liang Tong ◽  
Yang Qiuye Gao
Keyword(s):  
Three Dimensional ◽  
Simulation Software ◽  
Visual Simulation ◽  
Construction Project Management ◽  
Construction Process ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Whole Process ◽  
Rapid Construction ◽  
Management Project

In this paper, steel-trussed bridging method is combined with the whole process of the construction-management project with an aim to develop a visual simulation software, whose database requires a three-dimensional model of dynamic visual simulation. This application can quickly realize the rapid construction of various types of data and retrieval data-management digitization. The software system achieves the management visualization of various types of integrated data, which are easy to use, intuitive to understand. The system is suitable for all types of steel works automation and some refinement of modern construction project management.

scholarly journals Optimization Analysis of Construction Scheme for Large-Span Highway Tunnel Under Complex Conditions

2018 ◽  
Vol 64 (4) ◽  
pp. 55-68
Author(s):  
Jiao Pengfei ◽  
Xiao Zhang ◽  
Xinzhi Li ◽  
Bei Jiang ◽  
Bohong Liu ◽  
...  
Keyword(s):  
Ground Deformation ◽  
Three Dimensional ◽  
Simulation Software ◽  
Construction Process ◽  
Diagram Method ◽  
Deformation Control ◽  
Large Span ◽  
Construction Methods ◽  
Rock Stability ◽  
Construction Scheme

AbstractThe construction process of the tunnel ground deformation regularity of surrounding rock, stability, deformation control of tunnel surface based on the requirements, combined with the characteristics of shallow tunnel with large-span. Used three-dimensional numerical simulation software, established a dynamic tunnel analysis program to simulate the construction process of center cross-diagram method and double sidewall drift method. Based on the stratum deformation, supporting force and analysis of plastic zone distribution, comparative analysis of engineering adaptability of different construction methods from the construction process and construction mechanics, get optimization tunnel construction scheme.

Could biomass-fueled boilers be operated at higher steam temperatures? Part 3: Initial analysis of costs and benefits

TAPPI Journal ◽  
2014 ◽  
Vol 13 (8) ◽  
pp. 65-78 ◽  
Author(s):  
W.B.A. (SANDY) SHARP ◽  
W.J. JIM FREDERICK ◽  
JAMES R. KEISER ◽  
DOUGLAS L. SINGBEIL
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Superheated Steam ◽  
Black Liquor ◽  
Simulation Software ◽  
Operating Conditions ◽  
Costs And Benefits ◽  
Steam Generation ◽  
Fireside Corrosion ◽  
Corrosion Resistant

The efficiencies of biomass-fueled power plants are much lower than those of coal-fueled plants because they restrict their exit steam temperatures to inhibit fireside corrosion of superheater tubes. However, restricting the temperature of a given mass of steam produced by a biomass boiler decreases the amount of power that can be generated from this steam in the turbine generator. This paper examines the relationship between the temperature of superheated steam produced by a boiler and the quantity of power that it can generate. The thermodynamic basis for this relationship is presented, and the value of the additional power that could be generated by operating with higher superheated steam temperatures is estimated. Calculations are presented for five plants that produce both steam and power. Two are powered by black liquor recovery boilers and three by wood-fired boilers. Steam generation parameters for these plants were supplied by industrial partners. Calculations using thermodynamics-based plant simulation software show that the value of the increased power that could be generated in these units by increasing superheated steam temperatures 100°C above current operating conditions ranges between US$2,410,000 and US$11,180,000 per year. The costs and benefits of achieving higher superheated steam conditions in an individual boiler depend on local plant conditions and the price of power. However, the magnitude of the increased power that can be generated by increasing superheated steam temperatures is so great that it appears to justify the cost of corrosion-mitigation methods such as installing corrosion-resistant materials costing far more than current superheater alloys; redesigning biomassfueled boilers to remove the superheater from the flue gas path; or adding chemicals to remove corrosive constituents from the flue gas. The most economic pathways to higher steam temperatures will very likely involve combinations of these methods. Particularly attractive approaches include installing more corrosion-resistant alloys in the hottest superheater locations, and relocating the superheater from the flue gas path to an externally-fired location or to the loop seal of a circulating fluidized bed boiler.

Development of a Jacobian Module for Advanced Pulp and Paper Simulation and Control

TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 4-11
Author(s):  
MOHAMED CHBEL ◽  
LUC LAPERRIÈRE
Keyword(s):  
Control System ◽  
Nonlinear Behavior ◽  
Simulation Software ◽  
Pulp And Paper ◽  
Pid Controllers ◽  
Tuning Parameters ◽  
Pid Tuning ◽  
Fixed Set ◽  
And Control ◽  
Operating Points

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

Formation Of An Estimate For A State Contract With A Firm Price In The Construction Sector

2020 ◽  
pp. 47-57
Keyword(s):  
Construction Projects ◽  
Cost Of Capital ◽  
Federal Budget ◽  
The State ◽  
Structural Elements ◽  
Construction Sector ◽  
Construction Process ◽  
Practical Application ◽  
Stage Of Development ◽  
Capital Construction

The issues of determining the estimated cost of capital construction projects with the involvement of Federal budget funds at the stage of development of project documentation, during verification of the accuracy of determining the estimated cost and the initial (maximum) contract price are considered. On the basis of the assessment of amendments to urban planning legislation for the purpose of implementing a state contract by the contractor ( based on the results of competitive procedures or without competitive procedures by decision of state authorities), the procedure for forming the estimate as part of a state (municipal) contract, the price of which is firm, is presented. For the purpose of mutual settlements between the customer and the contractor for the work performed, the formation of primary accounting documentation, as well as for checking the work performed by regulatory authorities, an example of drawing up an estimate of the state (municipal) contract on the basis of grouping costs according to structural elements and complexes of work is given. The result of the research conducted was the development of regulations and the formation of criteria for their practical application by state bodies, institutions, organizations and other participants in the investment-construction process, as well as recipients of budget funds, who perform the functions of the state (municipal) customer, developer and technical customer.

A Highly Efficient and Optimised Simulation Based Multi objective Decision-Making for FMS Control

2018 ◽  
Vol 6 (6) ◽  
pp. 98
Author(s):  
Shreyanshu Parhi ◽  
S. C. Srivastava
Keyword(s):  
Decision Making ◽  
Real Time ◽  
Manufacturing Industry ◽  
Simulation Software ◽  
Shop Floor ◽  
Simulation Tool ◽  
Routing Flexibility ◽  
Decision System ◽  
Multi Objective ◽  
Arena Simulation

Optimized and efficient decision-making systems is the burning topic of research in modern manufacturing industry. The aforesaid statement is validated by the fact that the limitations of traditional decision-making system compresses the length and breadth of multi-objective decision-system application in FMS.  The bright area of FMS with more complexity in control and reduced simpler configuration plays a vital role in decision-making domain. The decision-making process consists of various activities such as collection of data from shop floor; appealing the decision-making activity; evaluation of alternatives and finally execution of best decisions. While studying and identifying a suitable decision-making approach the key critical factors such as decision automation levels, routing flexibility levels and control strategies are also considered. This paper investigates the cordial relation between the system ideality and process response time with various prospective of decision-making approaches responsible for shop-floor control of FMS. These cases are implemented to a real-time FMS problem and it is solved using ARENA simulation tool. ARENA is a simulation software that is used to calculate the industrial problems by creating a virtual shop floor environment. This proposed topology is being validated in real time solution of FMS problems with and without implementation of decision system in ARENA simulation tool. The real-time FMS problem is considered under the case of full routing flexibility. Finally, the comparative analysis of the results is done graphically and conclusion is drawn.

IMAJINASI KE IMAJINASI VISUAL FOTOGRAFI

2017 ◽  
Vol 12 (2) ◽  
pp. 91
Author(s):  
Edial Rusli
Keyword(s):  
Creative Process ◽  
Single Unit ◽  
Digital Images ◽  
Visual Image ◽  
Construction Process ◽  
Multiple Images ◽  
Artistic Process ◽  
Visual Imagination ◽  
Human Thought ◽  
The Media

AbstrakImaji visual fotografi merupakan media rekam visual yang objektif dan representatifkebenarannya dalam merekam suatu realitas. Revolusi teknologi menyebabkan perubahandari teknologi fotografi analog sebagai salah satu media yang menyatakan kebenaran ataubukti dan sebagai media yang representatif kebenarannya ke teknologi digital yang dapatmemungkinkan untuk merekayasa gambar digital melalui perangkat lunak. Teknologi digitaltelah menjadikan kebenaran dalam sebuah foto tidak lagi absolut. Akhirnya fotografi sebagaialat perekam imaji yang representatif kebenarannya semakin diragukan. Karena semakin sulituntuk membedakan foto asli atau palsu, bahkan sebuah foto asli bisa saja dikatakan sebagaihasil manipulasi. Penciptaan imajinasi visual fotografi ini dihasilkan dari suatu olah daya pikirmanusia. Dalam proses tersebut dibutuhkan suatu kreativitas dari penggabungan imaji-imajisebelumnya atau sekarang ini untuk diimajinasikan. Pemaknaan akan bergeser dari imaji visualfotografi menjadi imaji visual fotografi yang baru. Proses artistik imajinasi visual ini diciptakandengan didasarkan pada artistik yang berdasarkan imajinasi, artistik berdasarkan imajinasi danartistik didasarkan pada kombinasi antara kenyataan dan imajinasi. Penciptaan Imajinasi visualfotografi merupakan daya untuk mengonstruksi ataau menggabungkan kembali dari berbagaiimaji-imaji atau foto- secara imajinatif dan kreatif dengan persepsi yang menyertainya untukmenjadi imaji baru yang utuh, logis, dan mungkin terjadi dengan menggunakan teknik danefek fotografi. Proses mengonstruksi membutuhkan suatu kemampuan berimajinasi untukmenggabungkan dan menyatukannya untuk menjadi satu kesatuan (unity) yang utuh dalam satupermukaan gambar/imaji secara ekspresif dan imajinatif melalui proses estetis yang kreatifberdasarkan ciri personal penciptanya. Dengan demikian, hasil dari proses konstruksi tersebutsudah tidak tampak lagi imaji sebelumnya dan pemaknaannya sudah bergeser menjadi karyaimaji dengan pemaknaan baru.AbstractImage to Photography Visual Imagination. Visual image of photography is a visual recordingmedia which is objective and representative in revealing the truth when recording a reality. Thetechnology revolution led to the change in photography, from analog photographic technologyas one of the media for promoting truth or evidence and as media representing truth to thedigital technology which allow people to manipulate digital images through software. Digitaltechnology has made the truth in a photograph is no longer absolute. In the end, photographyas an images recording tool representing truth is doubted. It is getting harder and moredifficult to distinguish the original or fake photo, even an original photo can be said as aresult of manipulation.The creation of visual imagination photography is produced by thepower of human thought. The process requires a creativity of merging the previous or recentimages to imagine. The meanings will be shifted from visual image photography into a newvisual image photography. Visual imagination of the artistic process is created on the basisof artistic imagination, artistic imagination and artistic are based on a combination of realityand imagination.The creation of visual photography imagination is a power to construct orrecombine from multiple images or pictures imaginatively and creatively with the perceptionto be a whole new image, logical, and may occur with the use of techniques and photographiceffects. The process of constructing requires an ability of imagining to combine and unitethem into a single unit as a unity which is intact on s single surface of the picture/image,expressively and imaginatively through an aesthetic creative process based on the personalcharacteristics of the creator. By doing so, the construction process will no longer visible onthe former image and the meaning will shift into an image with a new meaning.

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