The coherent jamming is a considerable threat to radar. Its salient characteristic, phase distortion, causes degradation on monopulse angle measurement. radar may neither have the target echo and separated by beamforming for they are both in main lobe, nor pulse compressing when generated digital radio frequency memory. To cope with that, an identification algorithm aimed at based secondary phase-weight proposed. known mapping relation of error-signal voltage error has been used example....

Image contrast enhancement uses the object intensity transformation function to maximize amount of information enhance an image. In this paper, image problem is regarded as optimization problem, and particle swarm algorithm used obtain optimal solution. First, improved proposed. algorithm, individual optimization, local global are adjust particle’s flight direction. topology induce comparison communication between particles. The sparse penalty term in speed update formula added sparsity size...

We provide a sweep coverage algorithm for routing mobile sensors that communicate with central data sink. This improves on its predecessors by reducing the number of unnecessary scans when different points interest (POIs) have requirements time interval within which they must be scanned (sweep period). Most algorithms seek to minimize required cover given collection POIs. When POIs period requirements, existing will produce solutions in visit some much more frequently than is necessary....

For meeting the requirements of tactical missiles seeking miniaturized launch devices for storage, transportation, and launch, a tube-launched missile wing is adopted, which folds before quickly unfolds after launch. As structure installed on body to generate required aerodynamic force manipulating missile, can effectively stabilize missile’s flight attitude. At present, most research unfolding mechanism folding wings focused one-time folding. When wingspan large, multiple meet modern...

In this study, the authors consider problem of joint transmit waveform and receive filter design for cognitive radar. The is analysed in signal-dependent interference, as well additive channel noise an extended target with unknown impulse response (TIR). To address problem, iterative algorithm employed detection by maximising average signal-to-interference-plus-noise ratio received echo on premise ensuring TIR estimation precision. method, are optimally determined at each step based previous...

This article focuses on the employment of an inertial measurement unit (IMU) and a radar altimeter velocimeter as navigation sensors for Mars landing navigation. At beginning parachute descent phase, high dynamic oscillatory motion may saturate gyroscope produce large attitude estimation errors, thereby producing risk. To address this problem, online initialization algorithm is presented by combining data from IMU radar. By defining new frame, attitude, Mars-related velocity are conveniently...

Unsupervised domain adaptation aims at transferring knowledge from the labeled source to unlabeled target domain. Previous adversarial methods mostly adopt discriminator with binary or $K$-dimensional output perform marginal conditional alignment independently. Recent experiments have shown that when is provided information in both domains and label domain, it able preserve complex multimodal high semantic domains. Following this idea, we a $2K$-dimensional domain-level class-level...

In this paper, the problem of optimal waveform design for target tracking and estimation in cognitive radar (CR) is investigated. This analyzed signal-dependent interference, as well additive channel noise extended with unknown impulse response (TIR). An improved online optimization method proposed. method, Kalman filter used to accurately estimate TIR. At each filtering (KF) iteration, spectrum based on mutual information (MI) criterion modeled Fourier domain. Unlike most existing CR...

The diversity and variation of total active ammonia-oxidizing bacteria in a full-scale aerated submerged biofilm reactor for drinking water pretreatment were characterized by clone libraries denaturing gradient gel electrophoresis (DGGE) analysis 16S rRNA its gene during whole year. Sequences obtained from affiliated with the Nitrosomonas oligotropha lineage communis lineage. An uncultured subgroup was also detected. Seasonal variations both communities observed DGGE profiles, but an...

Processing conformal array signal is sensitive to antenna patterns on horizontal ( H ) and vertical V planes while mutual coupling (MC) impacts distinctly them. Many existing MC calibration algorithms ignore that thus lose their efficacy. In this study, modelled as distortions of patterns. The direction‐dependent slowly varied properties indicate can be estimated via sampling in the interested spatial range calibrated. A novel estimation algorithm for all kinds arrays proposed based it....

In this paper the problem of waveform design using Fractional Fourier Transform (FRFT) in signal-dependent interference, as well additive channel noise for stochastic extended target is investigated. Within constraints on energy and duration, optimum fractional domain based signal to interference plus ratio (SINR) criterion modeled. Simulations conducted illustrate that by changing angle variable, optimal designed can be distributed some narrow bands where power large small. addition, proved...

Although achieving remarkable progress, it is very difficult to induce a supervised classifier without any labeled data. Unsupervised domain adaptation able overcome this challenge by transferring knowledge from source an unlabeled target domain. Transferability and discriminability are two key criteria for characterizing the superiority of feature representations enable successful adaptation. In paper, novel method called learning TransFerable Discriminative Features unsupervised (TFDF)...

Based on local invariant feature points and cross ratio principle, this paper presents a feature-point-based image watermarking scheme. It is robust to geometric attacks some signal processes. extracts from the using improved scale transform algorithm. Utilizing these as vertexes it constructs quadrilaterals be regions. Watermark inserted regions repeatedly. In order get stable adjusts number distribution of extracted points. every chosen region decides locations embed watermark bits based...

In order to build a domain-specific knowledge hub for learning on the web, web resources crawled by generic search engines will need be sifted and sorted before use. We propose re-ranking algorithm that recognizes highly domain relevant data feed in hub. The studies structure semantics of ontology (graph) constructs computational relations among nodes. Through mining matching terms between dictionary textual content (text, metadata) retrieved documents some credited engines, we calculate...

For the coexistent radar and communications system, can receive communications-path signal, i.e., target return due to transmission from communications. The signal be exploited improve detection performance when it has high noise ratio (SNR). To show this, statistical model at receiver is developed, then generalized likelihood test (GLRT) for system derived in this paper. GLRT constant false alarm rate (CFAR). Finally, several numerical examples are presented verify gain by exploiting with SNR.

Data sharing and privacy protection of mobile users have always been a challenge to research development, as well commercial enterprise deployment the Global Positioning System (GPS) location-based applications. The concepts k-anonymity, two spatial cloaking algorithms - Nearest Neighbor Cloak (NNC) Hilbert (HC) that utilize user density's impacts on performance are discussed in this paper. proposed seeks examine adopt an adaptive scheme utilizes these improve security, system, using...

Abstract In order to study and analyze the operating characteristics NOx emission of typical non-road diesel machinery under actual conditions, this paper takes Excavators, Loader s Forklifts at construction sites as objects, On-board Emission Test Device (OETD in short) integrating Temperature Sensors, sensors, GPS GPRS is conducted carry out experimental tests, a Monitoring Platform Communicating with OETD by uesd collect real-time data machinery’s geographical location, exhaust...