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Geometric properties are critical for the function of molecules consisting of atoms which are usually modeled as a set of spheres in 3D. We propose "Molecular Geometry" which is a theoretical framework of computational understanding of the geometry of molecules in the claim that most, hopefully all, molecular structure problems can be effectively and efficiently facilitated by the "geometrization"...
The demand for high Internet availability has increased. As routing methods to recover fast from a single network component (link or node) failure, methods using multiple routing tables have been proposed. In the methods, when a component failure occurs, packets which are supposed to pass through the component in the failure-free state are rerouted using a routing table (backup table) which does not...
Modern science presents a number of challenges to the cyber-infrastructure supporting it: heterogeneity of the required computational resources, problems associated with storing, preserving and moving large quantities of information, a collaborative nature of scientific activities requiring shared access to resources, continuously growing requirements for computational power and network bandwidth,...
In this paper, a single-phase rectifier topology based on a five-level four-switch converter is proposed. Such topology will be called as 5L-4S Rectifier, which presents some advantages over the traditional ones, such as lower THD of the grid current due to high number of levels generated at the grid side and lower power switching losses. The complete analysis presented in this paper includes the...
In this paper, we categorized topology of terrorist networks into six because of their ideological, historical and practical similarities by showing them with real terrorist network examples.
In this paper, we propose a control method of ubiquitous computers using the Rete algorithm in grid topology network. The proposed method distributes and reduces the loads for processing rules and collecting data based on the Rete algorithm. We evaluated the proposed method and confirmed that the proposed method reduces the network traffic as loads.
Portability of developed solutions is a huge challenge for both the customers and cloud providers. A typical customer would like to realize a flexible software solution which can be easily deployed on a selected infrastructure or transferred on a cloud environment. Finally, the idea of a software environment independent of a specific cloud provider enables preferable conditions for customers.
The differential-mode Ćuk inverter (DMCI), with outstanding features, has a good chance to replace the conventional topologies in grid connected application for renewable energies. Two modulation schemes have been introduced for the inverter in literature. Discontinuous-modulation scheme (DMS) uses one module in each half line cycle, whereas the continuous-modulation scheme (CMS) continuously uses...
Using one DC source for the dual inverter open-end winding topology can lead to common-mode current circulating through the DC bus connections and, to prevent motor failure, arising of EMI issue and increasing losses in the system this should be avoided. Such common-mode current flow results if there is a common-mode voltage (CMV). Therefore, in this paper, a switching scheme for the dual inverter...
A high step-up converter based on three-stage SCVA is proposed. The operation principle and performance analysis of it is evaluated in continuous conduction mode. It has a high voltage gain with low voltage stress across components of the SCVA, as well as a simple control circuit, which is regulated by the conventional pulse-width modulation technique at a constant frequency and duty cycle, as well...
In this paper, a new single-phase single-stage ZCS PFC boost rectifier with reduced switch count is introduced. The efficiency of the proposed converter is improved by eliminating input stage diode-bridge. Moreover, only two active switches are used to permit bi-directional current flow from high-voltage-rail to low-voltage-rail and vice versa. Hence, no auxiliary switch is needed. A resonant inductor...
A highly reliable and efficient battery management system (BMS) is crucial for applications that are powered by electrochemical power. Cell balancing is one of the most important features of a BMS. Cell balancing techniques help to distribute energy evenly among battery cells. Without cell balancing, a portion of the capacity or energy in the battery bank will be wasted, especially for long battery...
This paper proposes a fully-distributed GMPLS framework through the use of extended RSVP-TE both for signaling and for routing, modulation and spectrum assignment (RMSA). Our proposed solution achieves lower blocking probability and shorter signaling-latency than does the state-of-the-art GMPLS/PCE architecture.
MANETs (Mobile Ad hoc Networks) are self organized networks with mobile and collaborating nodes without any pre-established infrastructure. Because of these characteristics, securing MANETs constitute a hard and challenging task. Consequently, new mechanisms may be of interest to secure such networks. To this end, we have found that trust management can be a support for MANET security. In fact, the...
Gallium Nitride devices are gathering momentum, with a number of recent market introductions for such applications as point of load converters (POL), off-line switching power supplies, battery chargers and motor drives. GaN devices have a much lower gate charge and lower output capacitance and, therefore, are capable of operating at a switching frequency 10 times of that of the silicon MOSFET. This...
This paper has analyzed routing selection errors in the process of two-way redistribution among different routing protocols in the large network architecture. The network device simulation software is used to state routing selection errors in the redistribution process between the protocol of RIP and OSPF. It also predicts the possible problems. Through the access control list, we will obtain the...
Aimed at the uneven energy consumption and data redundancy problem of the long-distance ribbon wireless sensor network, a cluster topology control algorithm is proposed based on the topology of ribbon wireless sensor network. The algorithm optimizes the cluster head selection mechanism and effectively guarantees sensor nodes with more residual energy and less communication cost as a cluster head....
This paper investigates the communication network architectures for power systems between substations using IEC 61850. Optimized Network Engineering Tools (OPNET) is used for the simulations. The simulation results show the performance of individual architectures power system communications (PSC) for substation automation systems (SASs). Nowadays, interoperability among multi-vendor substations automation...
A distributed architecture based on stateful PCE is proposed to realize end-to-end connection provisioning in multi-domain multi-vendor optical networks. We report a successful field trial of end-to-end connection establishment across three domains using commercial devices from three equipment venders.
Integrated-magnetic interleaved boost converters are under development for high-current, high-power applications ranging from automotive to distributed generation. The operating modes of these integrated-magnetic converters are complex and are also a function of the conduction of the lower inverse diode. A reverse-blocking diode or RB IGBT may be preferred for the lower switch, which introduces additional...
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