Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Many cloud services are running on geographically distributed datacenters for better reliability and performance. We consider the emerging problem of joint request mapping and response routing with distributed datacenters in this paper. We formulate the problem as a general workload management optimization. A utility function is used to capture various performance goals, and the location diversity...
With the growing popularity of intelligent terminals, as well as the increasing demand for location-based service, a design and implementation of WiFi network based mobile location service system and a location algorithm based on GMM (Gauss Mixture Model) introduced in this paper. The algorithm consists of an offline training phase and a real time localization phase, and RSSI is modeled by GMM. This...
In order to minimize user perceived latency while ensuring high data availability, cloud applications desire to select servers from one of the multiple data centers (i.e., server clusters) in different geographical locations, which are able to provide desired services with low latency and low cost. This paper presents CloudGPS, a new server selection scheme of the cloud computing environment that...
According to the characters of openness, modularization and interface of the NC control SINUMERIK 840D on machine tools, we use MPI, DDE to communicate/data-exchange with SINUMERIK 840D. And a data acquisition system for circular tests on NC machine tools is designed and developed. Based on ISO 230-4-2005 standard for circular tests, some evaluation parameters of circular tests is introduced. And...
Location based services (LBS) is one of the fastest growing areas in recent years. Location update of mobile clients is fundamental in all types of LBS. But algorithms proposed in this field generally didn't concern the restricted context of road network and caused some unnecessary update. This paper proposed a revised vector-based update algorithm which taking characteristics of road network into...
In this paper, we propose a hybrid cargo-level tracking system for logistics. We highlight the special system requirements, discuss the design issues and identify the design principles. Then we propose an innovative hybrid system. As far as we know, this is the first system that exploits both infrastructure-based and infrastructure-less positioning schemes for practical cargo-level tracking. Compared...
In the anti-spam field, raw reputation is the current mailing behavior of one email server. Meanwhile, it is the foundation of the distributed spam processing technology based on reputation mechanism. In this paper, the advantages and disadvantages of the existing several raw reputation generating approaches are analyzed, and a new method: MSGuard is proposed. MSGuard is a weighted raw reputation...
Detecting bots is becoming increasingly challenging with the sophistication of current bot technology. Most research has focused on identifying infected host machines but is unable to identify the specific bot processes on the host. This research analyzes active bot processes with emphasis on a newly identified vector of detection based on DNS activities occurring throughout the bot life cycle with...
In the anti-spam area, distributed spam processing technology that based on reputation mechanism is a currently main focus in research. The raw reputation plays an important role in computing the finial reputation of the target node. In this paper, we analyze the ratio-based raw reputation generation approach in detail, point out its problems, and propose an aggregation-based raw reputation generation...
Network time server and PCI timing card are two important devices of computer time synchronization. So it is necessary to research the features of them. In this paper, the two methods which synchronize accurate time to the computer based on the two devices were described. An effective PPS measurement method which shows synchronization accuracy and delay of each was made by using the computer parallel...
The recent three years have witnessed an explosion of networked video sharing, represented by YouTube, as a new killer Internet application. Their sustainable development however is severely hindered by the intrinsic limit of their client/server architecture. A shift to the peer-to-peer paradigm has been widely suggested with success already shown in live video streaming and movie-on-demand. Unfortunately,...
Biometric-based authentication can provide strong safety guarantee of user identity, but creates other concerns pertaining to template security. How to prevent the templates from being abused, and how to protect the users' privacy well are important problems. This paper proposes an approach based on knowledge signatures to solve these problems, which provides a cancelable template. Only a non-invertible...
Ontologies are increasingly used in many domains, such as knowledge management, information extraction, the semantic Web and so on. More and more ontologies have been published on the Web, with different scope and quality. Ontology evaluation has been proposed as one strategy for quality assurance of ontologies. In this paper, we propose a democratic ranking system analogous to that used by Amazon...
Understanding server capacity is crucial for system capacity planning, configuration, and QoS-aware resource management. Conventional stress testing approaches measure the server capacity in terms of application-level performance metrics like response time and throughput. They are limited in measurement accuracy and timeliness. In a multitier website, resource bottleneck often shifts between tiers...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.