Centralized control of steam-electric generators

1950 ◽  
Vol 69 (11) ◽  
pp. 966-966
Author(s):  
J. A. Lind ◽  
J. M. Geiger
Keyword(s):  
Centralized Control ◽  
Electric Generators

The Kelsenian Model of Constitutional Review in Times of European Integration – Reconsidering the Basic Features

2019 ◽  
Vol 19 (1) ◽  
pp. 7-37
Author(s):  
Aleksandra Kustra-Rogatka
Keyword(s):  
European Integration ◽  
Legal System ◽  
Constitutional Court ◽  
Centralized Control ◽  
Constitutional Treaty ◽  
Constitutional Courts ◽  
Constitutional Review ◽  
Legal Norms ◽  
Basic Features ◽  
The Eu

Summary The paper deals with the changes in the centralized (Kelsenian) model of constitutional review resulting from a state’s membership of the EU, which unequivocally demonstrates the decomposition of the classic paradigm of constitutional judiciary. The main point raised in the paper is that European integration has fundamentally influenced on the four above-mentioned basic elements of the Kelsenian model of constitutional review of legislation, which are the following: the assumption of the hierarchical construction of a legal system; the assumption of the supreme legal force of the constitution as the primary normative act of a given system; a centralised model of reviewing hierarchical conformity of legal norms; coherence of the system guaranteed by a constitutional court’s power to declare defectiveness of a norm and the latter’s derogation. All its fundamental elements have evolved, i.e. the hierarchy of the legal system, the overriding power of the constitution, centralized control of constitutionality, and the erga omnes effect of the ruling on the hierarchical non-conformity of the norms. It should be noted that over the last decade the dynamics of these changes have definitely gained momentum. This has been influenced by several factors, including the “great accession” of 2004, the pursuit of formal constitutionalization of the EU through the Constitutional Treaty, the compromise solutions adopted in the Treaty of Lisbon, the entry into force of the Charter, and the prospect of EU accession to the ECHR. The CJEU has used these factors to deepen the tendencies towards decentralization of constitutional control, by atomising national judicial systems and relativizing the effects of constitutional court rulings within national legal systems. The end result is the observed phenomenon, if not of marginalisation, then at least of a systemic shift in the position of constitutional courts, which have lost their uniqueness and have become “only ones of many” national courts.

An Efficient Cluster-Based Flooding Using Fuzzy Logic Scheme (CBF2S) In Mobile Adhoc Networks

2020 ◽  
Vol 14 ◽  
Author(s):  
S. Mahima ◽  
N. Rajendran
Keyword(s):  
Fuzzy Logic ◽  
Ad Hoc ◽  
Link Quality ◽  
Traffic Load ◽  
Node Degree ◽  
Communication Overhead ◽  
Delivery Ratio ◽  
Node Mobility ◽  
Centralized Control ◽  
Hop Count

: Mobile ad hoc networks (MANET) hold a set of numerous mobile computing devices useful for communication with one another with no centralized control. Due to the inherent features of MANET such as dynamic topology, constrained on bandwidth, energy and computing resources, there is a need to design the routing protocols efficiently. Flooding is a directive for managing traffic since it makes use of only chosen nodes for transmitting data from one node to another. This paper intends to develop a new Cluster-Based Flooding using Fuzzy Logic Scheme (CBF2S). To construct clusters and choose proper cluster heads (CHs), thefuzzy logic approach is applied with the use of three parameters namely link quality, node mobility and node degree. The presented model considerably minimizes the number of retransmissions in the network. The presented model instructs the cluster members (CM) floods the packets inside a cluster called intra-cluster flooding and CHs floods the packets among the clusters called inter-cluster flooding. In addition, the gateway sends a packet to another gateway for minimizing unwanted data retransmissions when it comes under different CH. The presented CBF2S is simulated using NS2 tool under the presence of varying hop count. The CBF2S model exhibits maximum results over the other methods interms of overhead, communication overhead, traffic load, packet delivery ratio and the end to end delay.

Usurpers of Technology: Train Robbery and Theft in Egypt, 1876–1904

2021 ◽  
pp. 1-18
Author(s):  
Xiaoyue Li
Keyword(s):  
Negative Impact ◽  
Centralized Control ◽  
Informal Networks ◽  
Grassroots Activism ◽  
Late 19Th Century ◽  
State Regulations ◽  
Colonial State ◽  
The Social ◽  
Social Wealth ◽  
Everyday Knowledge

Abstract This article examines banditry, embezzlement, and other insider crimes along Egyptian railway lines during a period when British officials exerted centralized control over the Egyptian railway and financial austerity had a negative impact on the rail sector. By exploring the motives and tactics of railway crimes, I posit that criminals, by making claims on and use of the technology outside the purview of state regulations, expressed their heterogeneous desires to redistribute social wealth, repurpose the technological promise of modern railways, and confound intentions of colonial governance. Using new archival materials, this article utilizes a bottom-up approach to examine grassroots activism, everyday knowledge, informal networks, and the social mores and norms that criminals harnessed to discern infrastructural vulnerabilities and elude surveillance from the colonial state. Ultimately, I contend that criminal acts uncovered social crises otherwise hidden under the shadow of the exterior prosperity and stability of late 19th-century Egypt.

Longitudinal and lateral collision avoidance control strategy for intelligent vehicles

2021 ◽  
pp. 095440702110240
Author(s):  
Ziyu Zhang ◽  
Chunyan Wang ◽  
Wanzhong Zhao ◽  
Jian Feng
Keyword(s):  
Real Time ◽  
Collision Avoidance ◽  
Decentralized Control ◽  
Control Strategy ◽  
Centralized Control ◽  
Lateral Control ◽  
Time Performance ◽  
Collision Avoidance Control ◽  
Avoidance Control ◽  
Control Accuracy

In order to solve the problems of longitudinal and lateral control coupling, low accuracy and poor real-time of existing control strategy in the process of active collision avoidance, a longitudinal and lateral collision avoidance control strategy of intelligent vehicle based on model predictive control is proposed in this paper. Firstly, the vehicle nonlinear coupling dynamics model is established. Secondly, considering the accuracy and real-time requirements of intelligent vehicle motion control in pedestrian crossing scene, and combining the advantages of centralized control and decentralized control, an integrated unidirectional decoupling compensation motion control strategy is proposed. The proposed strategy uses two pairs of unidirectional decoupling compensation controllers to realize the mutual integration and decoupling in both longitudinal and lateral directions. Compared with centralized control, it simplifies the design of controller, retains the advantages of centralized control, and improves the real-time performance of control. Compared with the decentralized control, it considers the influence of longitudinal and lateral control, retains the advantages of decentralized control, and improves the control accuracy. Finally, the proposed control strategy is simulated and analyzed in six working conditions, and compared with the existing control strategy. The results show that the proposed control strategy is obviously better than the existing control strategy in terms of control accuracy and real-time performance, and can effectively improve vehicle safety and stability.

scholarly journals Model predictive control for autonomous ground vehicles: a review

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Shuyou Yu ◽  
Matthias Hirche ◽  
Yanjun Huang ◽  
Hong Chen ◽  
Frank Allgöwer
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
High Performance ◽  
Control Method ◽  
Theoretical Background ◽  
Future Research ◽  
Centralized Control ◽  
Ground Vehicles ◽  
Uncertain Environments ◽  
Autonomous Ground Vehicles

AbstractThis paper reviews model predictive control (MPC) and its wide applications to both single and multiple autonomous ground vehicles (AGVs). On one hand, MPC is a well-established optimal control method, which uses the predicted future information to optimize the control actions while explicitly considering constraints. On the other hand, AGVs are able to make forecasts and adapt their decisions in uncertain environments. Therefore, because of the nature of MPC and the requirements of AGVs, it is intuitive to apply MPC algorithms to AGVs. AGVs are interesting not only for considering them alone, which requires centralized control approaches, but also as groups of AGVs that interact and communicate with each other and have their own controller onboard. This calls for distributed control solutions. First, a short introduction into the basic theoretical background of centralized and distributed MPC is given. Then, it comprehensively reviews MPC applications for both single and multiple AGVs. Finally, the paper highlights existing issues and future research directions, which will promote the development of MPC schemes with high performance in AGVs.

Medical Metaphors of Women's Bodies: Menstruation and Menopause

1988 ◽  
Vol 18 (2) ◽  
pp. 237-254 ◽  
Author(s):  
Emily Martin
Keyword(s):  
19Th Century ◽  
Reproductive Organs ◽  
Central Control ◽  
Centralized Control ◽  
Medical Texts ◽  
Women's Bodies ◽  
Waste Products ◽  
Bureaucratic Organization ◽  
Medical Metaphors ◽  
Female Reproductive Organs

Implicit, underlying imagery in medical descriptions of menstruation and menopause is exposed, beginning with 19th century views. Contemporary medical texts and teaching reveal two fundamental assumptions about women's bodies. First, they assume that female reproductive organs are organized as if they form a hierarchical, bureaucratic organization under centralized control. Given this assumption, menopause comes to be described negatively, as a process involving breakdown of central control. Second, they assume that women's bodies are predominantly for the purpose of production of desirable substances, primarily babies. Given this assumption, menstruation comes to be seen negatively, as a process involving failed production, waste products, and debris. Alternative imagery that works from our current understanding of physiology, but avoids denigration of women's bodies, is suggested.

Nonsquare Multivariable Chemical Processes: A Hybrid Centralized Control Proposal

2020 ◽  
Vol 59 (32) ◽  
pp. 14410-14422
Author(s):  
Jefferson Revelo ◽  
Marco Herrera ◽  
Oscar Camacho ◽  
Hernan Alvarez
Keyword(s):  
Chemical Processes ◽  
Centralized Control

Methods of Discontinuous Control for the Autonomous Underwater Vehicles

2013 ◽  
Vol 278-280 ◽  
pp. 1473-1476
Author(s):  
Alexander Lebedev
Keyword(s):  
Reference Model ◽  
Sliding Mode ◽  
Autonomous Underwater Vehicles ◽  
Variable Structure ◽  
Underwater Vehicles ◽  
Adjustment Process ◽  
Centralized Control ◽  
Reciprocal Effect ◽  
Discontinuous Control ◽  
Adjustment System

New methods of the synthesis of multi-dimensional robust and adaptive control systems for the centralized control of the spatial motion of autonomous underwater vehicles (AUV) is developed in this paper, such as variable structure system (VSS) and self-adjustment system with reference model. The conditions of the sliding mode existence and the self-adjustment process stability with the presence of essential dynamic reciprocal effect between all control channels are obtained and strictly proved. The application of synthesized discontinuous control provides the high control quality at any variations of the object parameters within the given ranges.

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