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This paper investigates the use of the Taguchi method based regression rate optimization method for the design of line-start permanent magnet motors. A weighted factor multi-objective (MO) technique is used to take into account both steady-state and transient performance objectives. To validate the proposed method a prototype machine has been designed, constructed and experimentally evaluated. It...
This paper proposes the algorithms for optimization of Remote Core Locking (RCL) synchronization method in multithreaded programs. The algorithm of initialization of RCL-locks and the algorithms for threads affinity optimization are developed. The algorithms consider the structures of hierarchical computer systems and non-uniform memory access (NUMA) to minimize execution time of RCL-programs. The...
ForkJoin framework is a widely used parallel programming framework upon which both core concurrency libraries and real-world applications are built. Beneath its simple and user-friendly APIs, ForkJoin is a sophisticated managed parallel runtime unfamiliar to many application programmers: the framework core is a work-stealing scheduler, handles fine-grained tasks, and sustains the pressure from automatic...
Large scale distributed simulation should be well planned before the execution, since applying unnecessary hardware only wastes our time and money. On the other side, we need enough hardware to achieve an acceptable performance. Thus, it is considerable to estimate the performance of a large scale distributed simulation before the execution. Such an estimation also improves the efficiency of the applied...
SDH and SONET networks are still widely used in metro network data infrastructure. However, over the next decade, they will be replaced by new infrastructures, e.g., IPcentric and SDN-enabled networks, throughout network migration that can take several months to a couple of years, in order to minimize the number of network disruptions. Consequently, telecommunication companies are looking for optimization...
This paper considers the optimal energy generation problem for hierarchical system, which consists of multi-cluster power system. In particular, consensus-based distributed hierarchical coordination algorithm is proposed to meet the power generation/demand balance. By using Lagrangian-based approach, we show that the optimization problem for the hierarchical system can be separated into each layer's...
In modern conditions, effective provision of advanced services to consumers is researched in the context of the concept of a global infrastructure for IoT, is possible through the creation of Unified National Synchro-Information System of Ukraine (UNSIS). Synchro-information for geographically distributed objects of various consumer kinds is formed by terminal devices (terminals) of the UNSIS, which...
In the modern LTE systems the Zadoff-Chu sequences are being used to transmit the synchronization signal. The complex sequence is transmitted both in the in-phase (I) and quadrature (Q) channels, the precision of which depends on the technological mismatch of the devices' parameters. The used sequences set a series of limitations on the existed communication systems. The development of new and prospective...
The problems of pinning synchronization and optimization for complex dynamical networks with sign inner-coupling configurations are investigated in this paper. Due to the negative interactions between the node variables, some new ragged synchronized regions are discovered for the chaotic Chen system. A modified optimization algorithm of weight assignment in arbitrary networks subjected to pinning...
In this paper, we present an optimized framework that can efficiently perform massive spatial queries on the current GPUs. To benefit the widely adopted filter-and-verify paradigm from GPUs, the skewed workloads are first associated with certain cells in a scaled spatial grid, such that the following range verification cost against the massive spatial objects can be significantly reduced. Particularly...
In distributed transmit beamforming, two, or more, spatially separated communications nodes act as elements of an antenna array to beamform common data to a destination node. Spatially separated cooperating nodes synchronize their carrier frequencies and control their transmission phases so that at the destination node the received signals combine constructively. An important example is cooperative...
In this paper we present methods to reach 10-years of battery life for Industrial Internet of Things (IIoT) wireless sensor network (WSN) using a platform called the I3Mote. I3Mote provides connected sensor nodes for tough industrial environment and a number of I3Motes can form a large-scale coverage of data collectors or actuators. The goal is to achieve 10-years network life time for all the connected...
We present a single-node, multi-GPU programmable graph processing library that allows programmers to easily extend single-GPU graph algorithms to achieve scalable performance on large graphs with billions of edges. Directly using the single-GPU implementations, our design only requires programmers to specify a few algorithm-dependent concerns, hiding most multi-GPU related implementation details....
Data movement is increasingly becoming the bottleneck of both performance and energy efficiency in modern computation. Until recently, it was the case that there is limited freedom for communication optimization on GPUs, as conventional GPUs only provide two types of methods for inter-thread communication: using shared memory or global memory. However, a new warp shuffle instruction has been introduced...
In this paper, robustness of PD-like distributive consensus of multiple agents with double-integrator dynamics communicating over a network prone to link failures is discussed. This paper proposes a novel Lyapunov function for stability analysis of double-integrator distributive consensus for a connected topology. In case of non-connected topology the growth of disagreement vector is analyzed using...
While tapping onto the mobile device capabilities for execution of resource intensive tasks, it has been proven by many studies that the local device resources are unable to completely perform the task execution. Therefore, it becomes imperative that the intra-device resources are put to productive use by offloading the jobs to a remote location for execution. However, in those settings where the...
It is well known that the TLB performance impacts the memory system performance, which is critical for overall system performance. Similar to multi-level caches, multilevel TLBs have become an important leverage for boosting data access performance. Applications have increasingly large working sets. Servers targeting such applications have thus been built with ever larger main memory capacities, but...
To solve the problems of poor smoothness and big frictional work in start-up of automated mechanical transmission with wet clutch. The start-up fuzzy control strategies is proposed. The precise control of clutch pressure is obtained by using optimization of fuzzy control parameter based on ant colony algorithm. The simulation and experiment results showed that the control strategy reduces the driveline...
This paper aims at finding a minimal placement technique for placing Phasor measuring units for reducing the cost of state estimate. The method used in this technique is binary integer linear programming. The results shows that the method adopted can be effectively used in practical. This paper suggests the use of phasor measurement units for improving power system state estimation and observebility...
Ease of programming is one of the main impediments for the broad acceptance of multi-core systems with no hardware support for transparent data transfer between local and global memories. Software cache is a robust approach to provide the user with a transparent view of the memory architecture; but this software approach can suffer from poor performance. In this paper, we propose a hierarchical, hybrid...
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