The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The performances of several signal-to-noise ratio (SNR) estimation techniques reported in the literature are compared to identify the "best" estimator. The SNR estimators are investigated by the computer simulation of quartenary phase-shift keying (QPSK) signals in complex additive white Gaussian noise (AWGN).The mean square error is used as a measure of performance. In addition to comparing...
The Internet of Things is a paradigm of the interconnection of heterogeneous equipment, will be part of the future of the Internet. Wireless sensor networks is a major component of the Internet of Things. Large-scale heterogeneous network integration and management is one of the major challenges of the Internet of Things. This requires building automation or intelligent network management system to...
With the development of information technology, electronic handbook is used commonly. The important of electronic handbook materials is growing, so that a model of word resource management system based on Open XML is submitted in order to realize materials' collection and sharing. And introduce the application of Open XML in Word resource management system.
The aim of software safety certification is to determine whether software has achieved the safety that system requests. This paper advances a software safety certification framework based on safety case from the view of product, providing software safety evidence which can be applied independently of software development process. First the conception, structure, significance and presentation method...
As popular web applications, web services can provide very flexible application integration taking advantage of existing Internet protocols and open standards. However, there are a few stubborn problems which exist in its architectures, for example, security. Especially in distributed services environment, trust which is a proved way to resolve security problem of web service is crucial to service...
Based on the Coordinated Universal Time (NTSC) from National Time Service Center, remote time calibrations center provides local time calibration for remote laboratory using Satellite common-view technique. The local time of long-distance workstations can be compared via this system and the time difference can be got in real-time. In accordance with ex post ephemeris, the time difference also can...
The technology of IOT (Internet of things) receives widespread attention in recent years. To better understand the IOT technology, a detailed introduction is made on the development and application of the IOT as well as one of its key technologies "RFID technology". To better understand and grasp the IOT operation principle and working mechanism, combined with the EPC global standards, an...
Push-to-Talk over Cellular (PoC) system is ideal for group communication in many cooperative work environments because of its wider coverage and more flexibility than traditional trunk communication systems. The long session-setup-delay is an important problem that must be solved before the commercial application of PoC system. Many research works have been done to solve it in some mobile networks,...
As the core technology of Web 2.0, Ajax has caught more and more attention. Xml, as the traditional data load format, needs to be resolved by DOM (Document Object Model ) both in client-side and server-side, which wastes system resource and makes a great reduction of user-friendliness. In this paper, a light-weightdata-interchanging format --JSON (Java Script Object Notation) will be introduced, which...
Periodically inserted I-Frames will introduce periodical flickering artifact. For suppressing the flickering, a PI-method is proposed in this paper, in which the GOP length is enlarged and PI-frames are periodically inserted in each GOP. The PI-frames in PI-method are coded as both P-frames and I-frames, namely RP-frames and RI-frames respectively. The RP-frames will be decoded if there is no transmission...
after analysis and comparison of different matching algorithms, a kind of real-time image splicing algorithm is proposed basic on the combination of gray level and characteristic points. Firstly, the algorithm performs self-adaptive adjustment to gain required size, secondly, determines matching direction and general position with characteristic marginal points and then optimal matching points with...
With the development of the transport sector maritime industry, in data integration, especially the import and export of data, lack an efficient and quick method. In this paper, we make a research on the XML technical features and design a new data integration structure, including modules for data import and export. Finally we use the new integration structure into practice. On the basis of the XML...
In recent years, monolingual or multilingual (primarily bilingual) corpora are viewed as key resources in language information processing and language engineering projects. A Chinese English parallel corpus is being set up. This paper gives a brief discussion on construction, annotation, and alignment of the parallel corpus. And how it is used in Chinese English Machine translation.
Self/Non-self discrimination is the basic mission of the artificial immune systems (AIS). In traditional AIS, detectors discriminate non-self elements based on the Minkowski distance between detectors and antigens. However, in high dimensional feature space the distances between elements converge to a similar value, so the data discrimination will become much difficult. In this article, the relationship...
The meta-model via metadata construct language is the key to heterogeneous metadata. This article analyzes the application of meta-model to the metadata heterogeneous problem, and builds a system of Military Training Data Meta-model (MTDM) framework based on the criterion of MOF meta-modeling so as to realize integration and sharing of military training data.
Incremental learning algorithms of the Gaussian Mixture Model can find applications in various scenarios. This paper proposes a CUDA-based method to accelerate incremental learning of GMM. Different from existing methods towards GMM on GPU, our method aims to hide data transfer latency instead of accelerating the algorithm itself. Due to the inherent characteristic of memory-critical incremental learning...
Sentiment (or opinionated) lexicon plays an important part in sentiment analysis (or opinion mining) tasks. With the popularity of Social Network platforms such as tweeter and microblog, net neologisms welcome the spring of development and popularity. With the blooming of net neologisms, it is quite necessary to identify new sentiment words and improve current sentiment lexicon. This paper proposes...
This paper presents an improved region growing method. Firstly, the automatic seed region growing method is used in this paper to overcome the blindness for selecting the seed pixels. Secondly, the Normalized Cut (N-cut) method is used between the regions to overcome the disadvantage of the region growing without meaningful regions. Finally, the final image segmentation is obtained. The experimental...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.