programming demands a high level of intellectual work and also cognitive skills of high level order. To learn programming is not an easy task, neither to teach nor train those skills. In this paper we present, as a se...
ISBN:
(数字)9781728125244
ISBN:
(纸本)9781728125251
programming demands a high level of intellectual work and also cognitive skills of high level order. To learn programming is not an easy task, neither to teach nor train those skills. In this paper we present, as a second part of our research, the foundations of the cognitive skills extracted from classic and specialized literature, in order to set a basis for new studies addressed on how to train cognitive skills and how to assess them. We present a survey to investigate if students and professional software developers have awareness about the implication of cognitive skills in the programming process. the survey has encouraging results.
Deployable Space Systems, Inc., (DSS) Roll-Out Solar Array (ROSA) is a new flexible-blanket technology that achieves ultra-high performance and affordability for end-users. Recently, in June 2017, a spaceflight demons...
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ISBN:
(纸本)9781538685297
Deployable Space Systems, Inc., (DSS) Roll-Out Solar Array (ROSA) is a new flexible-blanket technology that achieves ultra-high performance and affordability for end-users. Recently, in June 2017, a spaceflight demonstration mission of the ROSA solar array funded by the U.S. Air Force was conducted on the international Space Station (ISS). the 7-day long mission was specifically structured to validate functional deployment, deployed dynamics behavior and deployed stiffness, deployed thermal / dimensional stability, stowed vibration survivability, retraction and re-deployment, photovoltaic power production and on-orbit operating temperature. Results from the highly successful spaceflight mission confirmed all key performance metrics for validating functional deployment, deployed dynamics, vibration survivability, retraction and redeployment, dimensional stability, and power production. the mission also validated many detailed analytical models that are being applied towards future mission applications. the mission success has resulted in a flight ready status of the ROSA technology and has enabled many commercial infusion implementations.
Due to the increasing competitiveness of businesses, project planning and scheduling have become a challenging theme in the last years. In this paper, we propose a two-stage stochastic programming model for the resour...
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ISBN:
(纸本)9789897582851
Due to the increasing competitiveness of businesses, project planning and scheduling have become a challenging theme in the last years. In this paper, we propose a two-stage stochastic programming model for the resource constrained project scheduling problem, taking into account the stochasticity of activity durations. In this formulation, assuming that some activity duration scenarios are known, resource allocations are taken in the first stage, while scheduling decisions are postponed in the second stage. the resulting problem is a mixed integer problem with recourse, where binary variables appear in the first stage. In order to efficiently solve the problem, a decomposition algorithm is developed, based on the well-known integer L-shaped method. Detailed computational results are presented for a set of benchmark instances taken from the literature. Copyright 2018 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved
the main difference between conventional automation and current approaches of digitized industrial processes is the use of the Internet. the Internet enables the development of distributed systems consisting of loosel...
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ISBN:
(纸本)9781728137889
the main difference between conventional automation and current approaches of digitized industrial processes is the use of the Internet. the Internet enables the development of distributed systems consisting of loosely coupled and interacting components such as robots, plants and control software. the components are not permanently tied to each other, but rather dynamically combined according to the specific requirements of the target system. this results in highly flexible systems that are distributed globally and across company boundaries. the development, maintenance and modification of various components is decentralized and can therefore lead to incompatibilities that can impair their interoperability. this paper describes an approach for the interaction of control software, which ensures interoperability of components in distributed systems. the underlying principles of REST are used to automatically identify properties in the structural models of OPC UA and use them to determine the required processes for further invocation. this enables extensive modifications of the individual components without creating incompatibilities.
In order to support community-based tourism, the Ministry of BUMN launches the Balkondes program or Balai Ekonomi Desa in 2017. the manifestation of the program is tourism in each village in the Borobudur District. At...
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In order to support community-based tourism, the Ministry of BUMN launches the Balkondes program or Balai Ekonomi Desa in 2017. the manifestation of the program is tourism in each village in the Borobudur District. At present, there are 20 Balkondes in Borobudur which are ready to be visited besides the Borobudur Temple. Each Balkondes has characteristics and characteristics that differ according to the potential of the Village. So tourists will not feel disadvantaged visiting some or all of the Balkondes. However, often tourists do not have enough time to visit all of the Balkondes. the problem that is often faced by tourists is the limited time of visit. therefore, to help tourists determine tourist attractions and routes that must be passed to get maximum results an application needs to be made. To determine the route applied Greedy algorithm, then the results are processed to calculate the estimated visit time and travel time. the results of this calculation are then applied to an application called TurBo. this application is designed based on Android to determine several destinations based on the allocation of time owned by tourists. Making it easier for tourists to set more goals with more efficient time.
this control system is implemented to coordinate multiple robots in cooperative exploration tasks, in which a task assignment algorithm is used for calculating the expectation cost to achieve the required tasks and th...
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this control system is implemented to coordinate multiple robots in cooperative exploration tasks, in which a task assignment algorithm is used for calculating the expectation cost to achieve the required tasks and then allocate necessary tasks to specific robots. Robot control systems are used to gather crucial information about a disaster environment, such as a victim's position or changes in an indoor environment before a human is able to enter that environment. there are practical problems in using previous systems because these systems need professionals to operate these multi-robots. the proposed system automatically distributes tasks to each robot based on target positions that are selected by the person who does not possess any prior knowledge about robot operation. therefore, the operator needs only to determine the target position of interest and not be concerned about controlling the robot. Moreover, the system is implemented using ROS in order to add functions and apply this system to various types of robots. this system has been verified and evaluated by Turtlebot 3 in the Gazebo simulator, as well as in a real setting by conducting the system usability scale (SUS) with 23 firefighters.
A discrete glowworm swarm optimization algorithm with key strategy adjustment (KSA-DGSO) is proposed to solve the problems that the current discrete glowworm swarm optimization algorithm (DGSO) is lack of application ...
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A discrete glowworm swarm optimization algorithm with key strategy adjustment (KSA-DGSO) is proposed to solve the problems that the current discrete glowworm swarm optimization algorithm (DGSO) is lack of application features combined with practical problem, rigorous and accurate scientific basis, which is caused by updating the position of the individual glowworm according as the random probability. the KSA-DGSO algorithm is applied to search for the optimal control strategy of complex network security risk. the position update mechanism of the algorithm is reset according to the change case of the objective function withthe key strategy, which prevent the algorithm into the local stalemate or cause a poor accuracy. the experiment results show that the optimal objective function is average reduced by about 2.55%-4.83% withthe KSA-DGSO algorithm than the DGSO algorithm, and the optimal iteration number is average reduced by about 9.85%-12.80%. the superiority of the KSA-DGSO algorithm is validated by simulations, and the effect of the change for the control parameters to the complex network security risk optimal control is further analyzed from the simulated results.
As a new type of vehicle, electric vehicles can improve energy efficiency and reduce environmental pollution. However, as a special load, the charging behavior of electric vehicles is random and intermittent. In this ...
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As a new type of vehicle, electric vehicles can improve energy efficiency and reduce environmental pollution. However, as a special load, the charging behavior of electric vehicles is random and intermittent. In this paper, the genetic algorithm is used to solve the charging and discharging constraints of electric vehicles. Taking the lowest cost as the objective function, a combined start and stop model oflarge-scale electric vehicle charging and discharging considering multiple constraints is established, and the optimal combination and minimum power generation cost are obtained. the common algorithms of unit commitment are also introduced. Genetic algorithm is used to solve complex nonlinear optimization problems. Multiple constraints and special requirements for objective functions can be considered. With Matlab and finite iteration, the optimal solution and generating unit output are solved for a specific example, and a set of optimal start - stop combinations in a group of 24 hours is obtained.
For remote island communities, the hybrid wind-diesel generation system is a very common solution to provide electricity. Nowadays, the energy storage systems have become increasingly viable. the energy storage system...
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Business process management systems (BPMS) are vital complex information systems to compete in the global market and to increase economic productivity. Workload balancing of resources in BPMS is one of the challenges ...
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ISBN:
(纸本)9781450354141
Business process management systems (BPMS) are vital complex information systems to compete in the global market and to increase economic productivity. Workload balancing of resources in BPMS is one of the challenges that researchers have studied for a long time. Workload balancing of resources increases the system stability, improves the efficiency of the resources and enhances the quality of their products. In this paper, tuning concurrency of the business process is introduced as a problem in BPMS. It focuses on application issues in improvement of workload balance of resources and uniformity in the workload of each resource. thus, a delay vector is defined where each element of the delay vector makes a synthetic delay at the beginning of each business process. A dynamic optimization algorithm is proposed to calculate the delay vector. the comparison of the state-space search algorithm to proposed algorithm shows improving speed of 5.8 years to 37 hours.
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