The Application of Communication between SLC500 PLC and Profibus-DP Fieldbus

2014 ◽  
Vol 668-669 ◽  
pp. 1351-1354
Author(s):  
Shou Tao Li ◽  
Wei Jiang ◽  
Hai Ying Qi
Keyword(s):  
Control Systems ◽  
Data Communication ◽  
Response Speed ◽  
Experimental Results ◽  
Practical Application ◽  
Communication Efficiency ◽  
Profibus Dp

SLC500 PLC can not directly communicate with the Profibus device, which limits its practical application. This paper studies the Profibus protocol and proposes a scheme to realize communication between SLC500 PLC and Profibus network through Flex I/O module, which is prepared for applying SLC500 PLC in multi-protocol environments. The proposed solution can improve the communication efficiency and the response speed in control systems. Experimental results have validated the proposed method’s accuracy, reliability and efficiency in data communication.

Accommodation and Convergence in the Human Eye

1969 ◽  
Vol 2 (3) ◽  
pp. T29-T33 ◽  
Author(s):  
F. M. Toates
Keyword(s):  
Control Systems ◽  
Control Model ◽  
Monocular Vision ◽  
Experimental Results ◽  
After Effects ◽  
Human Eye ◽  
Theoretical Predictions ◽  
Accommodative Convergence ◽  
Effect Of Age

The control systems of accommodation and convergence in the human eye are theoretically examined, together with their interactions which represent accommodative convergence and convergence induced accommodation. A control model is proposed in order to help to understand the system, and it is used to make predictions concerning accommodation and convergence placed in conflict, monocular vision, fusional after-effects and the effect of age and drugs on accommodation and accommodative convergence. In each case the theoretical predictions are compared with established experimental results.

Comparison of Times of Synchronization of Chaotic Burke-Shaw Attractor with Active Control and Integer and Optimum Fractional-Order Pecaro Carroll Method

2021 ◽  
Author(s):  
Ali Durdu ◽  
Yılmaz Uyaroğlu
Keyword(s):  
Active Control ◽  
Fractional Order ◽  
Chaotic Attractor ◽  
Secure Communication ◽  
Chaotic Systems ◽  
Control Method ◽  
Initial Conditions ◽  
Data Communication ◽  
Experimental Results ◽  
Active Control Method

Abstract Many studies have been introduced in the literature showing that two identical chaotic systems can be synchronized with different initial conditions. Secure data communication applications have also been made using synchronization methods. In the study, synchronization times of two popular synchronization methods are compared, which is an important issue for communication. Among the synchronization methods, active control, integer, and fractional-order Pecaro Carroll (P-C) method was used to synchronize the Burke-Shaw chaotic attractor. The experimental results showed that the P-C method with optimum fractional-order is synchronized in 2.35 times shorter time than the active control method. This shows that the P-C method using fractional-order creates less delay in synchronization and is more convenient to use in secure communication applications.

The Research on Multi-Axes Automatic Motion Control Systems

2012 ◽  
Vol 459 ◽  
pp. 75-78
Author(s):  
Lian Jun Hu ◽  
Xiao Hui Zeng ◽  
Gui Xu Chen ◽  
Hong Song
Keyword(s):  
Control System ◽  
Embedded Systems ◽  
Automatic Control ◽  
Control Systems ◽  
Motion Control ◽  
Automatic Control System ◽  
Experimental Results

An automatic control system for multi-axes motions based on multi-CPU embedded systems is proposed in the paper, in order to overcome insufficiencies of available multi-axes automatic dispensing control systems. It is shown from experimental results that expected control objectives for multi-axes motions are achieved.

scholarly journals Freezing Technology: Challenges and Prospects for Sustainable Development in Urban Infrastructure

2019 ◽  
Vol 5 (2) ◽  
pp. 169
Author(s):  
Shunji Kanie
Keyword(s):  
Sustainable Development ◽  
Urban Infrastructure ◽  
Experimental Results ◽  
Practical Application ◽  
Environmental Friendliness ◽  
Use Of Space ◽  
Freezing Soil ◽  
The Arts ◽  
Ground Freezing ◽  
Frozen Sand

Ground freezing has been broadly applied to construction and maintenance works of infrastructures because of its environmental friendliness. Since freezing technology represented by ground freezing can improve the strength of soil as well as its water-tightness, it becomes an essential technology for construction and maintenance of urban infrastructures where the use of space in underground has already been highly integrated. In this paper, overview of the freezing technology is introduced with some important characteristics of freezing soil for practical application. In addition, freezing technology is used for interesting works which could not be completed without freezing, and the state of the arts in freezing technology is presented. A pipe-in-pipe, now the authors are developing, is an example to utilize the potential of frozen sand, and the effect of freezing is explained with experimental results.

Analysis and comparison of the two sectoring approaches in elevator traffic systems

2019 ◽  
Vol 40 (5) ◽  
pp. 611-626
Author(s):  
Lutfi Al-Sharif ◽  
Ahmad Hammoudeh ◽  
Jannat Al-Saidi
Keyword(s):  
Control Systems ◽  
Traffic Control ◽  
Control Algorithm ◽  
Dynamic Allocation ◽  
Practical Application ◽  
Round Trip ◽  
Allocation Method ◽  
Group Control ◽  
Static Allocation ◽  
Traffic Systems

Sectoring is a group control algorithm that is used in elevator traffic control systems by grouping passengers that have common destinations or common origins into elevator cars that serve these floors. The building is split into sectors usually comprising contiguous floors. Two different alternative algorithms for sectoring are discussed in this paper. The first approach is based on dynamic allocation with equal sector allocation. The second approach is based on static allocation with unequal sector sizes. Under static allocation, the same elevator car is allocated to the same sector in every round trip. Under dynamic allocation, each elevator car is allocated to a different sector in each round trip. Under the dynamic allocation scheme suggested in this paper, the elevator cars are sequenced to the various sectors in the buildings in a round-robin fashion. It is important to note that under both schemes, the provided (relative) handling capacity of different sectors is equalised. Five different buildings have been analysed using the two suggested sectoring algorithms. The building is first designed by finding the required number and speed of elevators assuming conventional control. Each building is then analysed using one of the two suggested sectoring algorithms. In order to compare the performance of the two sectoring algorithms, the provided (relative) handling capacity is calculated. The provided (relative) handling capacity of the two suggested algorithms is then compared. Very little difference was found between the two algorithms. The dynamic sectoring with equal sector sizes offers the convenience of having equal sector sizes. The static sectoring with unequal sector sizes is more convenient for passengers that are familiar with the building. Practical application: This paper analyses two different options for sectoring the control system of an elevator system in a building. Each of the two sectoring methods is suitable for different situations. The dynamic allocation method is more suitable for destination group control systems and offers the group controller more flexibility. The static allocation method with unequal sector sizes ensures that the passengers remain familiar with the elevators that they use to get to their floors. The programmer of the elevator group controller can programme both methods in the controller and allow it to switch to the most suitable algorithm depending on the prevailing conditions.

scholarly journals FedOpt: Towards Communication Efficiency and Privacy Preservation in Federated Learning

2020 ◽  
Vol 10 (8) ◽  
pp. 2864 ◽  
Author(s):  
Muhammad Asad ◽  
Ahmed Moustafa ◽  
Takayuki Ito
Keyword(s):  
Privacy Preservation ◽  
State Of The Art ◽  
Homomorphic Encryption ◽  
Evaluation Criteria ◽  
The State ◽  
Compression Algorithm ◽  
Experimental Results ◽  
Local Learning ◽  
Learning Models ◽  
Communication Efficiency

Artificial Intelligence (AI) has been applied to solve various challenges of real-world problems in recent years. However, the emergence of new AI technologies has brought several problems, especially with regard to communication efficiency, security threats and privacy violations. Towards this end, Federated Learning (FL) has received widespread attention due to its ability to facilitate the collaborative training of local learning models without compromising the privacy of data. However, recent studies have shown that FL still consumes considerable amounts of communication resources. These communication resources are vital for updating the learning models. In addition, the privacy of data could still be compromised once sharing the parameters of the local learning models in order to update the global model. Towards this end, we propose a new approach, namely, Federated Optimisation (FedOpt) in order to promote communication efficiency and privacy preservation in FL. In order to implement FedOpt, we design a novel compression algorithm, namely, Sparse Compression Algorithm (SCA) for efficient communication, and then integrate the additively homomorphic encryption with differential privacy to prevent data from being leaked. Thus, the proposed FedOpt smoothly trade-offs communication efficiency and privacy preservation in order to adopt the learning task. The experimental results demonstrate that FedOpt outperforms the state-of-the-art FL approaches. In particular, we consider three different evaluation criteria; model accuracy, communication efficiency and computation overhead. Then, we compare the proposed FedOpt with the baseline configurations and the state-of-the-art approaches, i.e., Federated Averaging (FedAvg) and the paillier-encryption based privacy-preserving deep learning (PPDL) on all these three evaluation criteria. The experimental results show that FedOpt is able to converge within fewer training epochs and a smaller privacy budget.

The Preprocessing for Infrared Sea-Surface Target Image

2012 ◽  
Vol 433-440 ◽  
pp. 4512-4515
Author(s):  
Shu Li Lou ◽  
Jian Cun Ren ◽  
Yan Li Han ◽  
Xiao Hu Yuan ◽  
Xiao Dong Zhou
Keyword(s):  
Feature Extraction ◽  
Target Recognition ◽  
Infrared Image ◽  
Automatic Target Recognition ◽  
Experimental Results ◽  
Sea Surface ◽  
Practical Application ◽  
Target Image

The preprocessing for infrared sea-surface target image is very important to automatic target recognition and tracking. The preprocessing can reduce noise and enhance target, and it is the base of feature extraction and target recognition. The scene model of infrared sea-surface target image was established. The characteristics of infrared image are analyzed, and several methods of preprocessing nowadays were analyzed and compared. According to the different characteristic of infrared image, a preprocessing scheme is proposed. The experimental results indicate that in practical application appropriate methods should be chosen for different purpose. In order to get good preprocessing effects, these methods can be assembled into multi- process.

Extracting Images from Chinese PDF Documents

2014 ◽  
Vol 530-531 ◽  
pp. 887-890
Author(s):  
Yong Hua Yin ◽  
Ying Jin ◽  
Quan Yin Zhu ◽  
Yun Yang Yan
Keyword(s):  
Extraction Rate ◽  
Experimental Results ◽  
Practical Application ◽  
Document Structure ◽  
Potential Value

In order to efficient tap the potential value in Chinese PDF documents and use Chinese PDF documents, an unique idea that extracting images from Chinese PDF documents is proposed in this paper. The idea combines PDFs document structure and page tree to extract images. Based on this idea, the experiments in this paper are done with one hundred Chinese PDF documents. And the extraction rate of the experiments obtains 83.56 percent. According to the analysis of experimental results, it is proved that the idea proposed in this paper is applicable to most of Chinese PDF documents and it is able to meet most of the needs of practical application.

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