Daily increasing underwater visual data makes automatic object detection and recognition a great demand challenging task. In this paper, we adopt region proposal network to accelerate from Faster R-CNN. This process implement acceleration by using convolutional networks generate high-quality candidates, sharing these with original networks. Applied real-world fish dataset, which includes 24,277 ImageCLEF images belonging 12 classes, system has nearly real-time frame rate of 9.8 ftps, while...

Purpose Slim and dexterous manipulators with long reaches can perform various exploration inspection tasks in confined spaces. This paper aims to present the development of such a continuum manipulator for potential applications aviation industry. Design/methodology/approach Benefiting from newly conceived dual mechanism improved actuation scheme, this proposes design slim manipulator. Kinematics modeling, simulation-based dimension synthesis, structural constructions system descriptions are...

Continuum robots and manipulators attracted lots of attention in the past decade owing to their dexterity, intrinsic compliance design compactness. A widely accepted approach formulating kinematics a multi-segment continuum robot is assume shapes as serially connected arcs with constant curvature at different values for each segment. In spite simplification kinematics, complete analytic solutions inverse (IK) problem such may not exist. Instead, generalized Jacobian method often used IK...

Researches on continuum robots thrive due to many advantages such as design compactness and motion dexterity. Among the recent advances, it is well noted proposal of Parallel Continuum Robot (PCR) whose legs are made from elastic rods. The undergo deformations along their entire lengths sophisticated mechanics used describe shapes kinematics. Following a different approach, this paper proposes parallel with joints. joints would assume constant curvature bending hence produce relatively...

During industrial operations and in confined places, carbon monoxide (CO) may collect harmful proportions if ventilation is insufficient or appliances are not properly maintained. When the concentration of CO too high, it might result suffocation, coma, even death. The detection tiny concentrations plays an important role safe production. Due to selective absorption specific wavelengths light by gas molecules, lasers have a wide range applications field detection. In this paper, tunable...

Environmental monitoring, public safety, safe production, and other areas all benefit greatly from the use of gas detection technologies. The infrared image a could be used to determine its type long distance in detection. can show spatial distribution cloud background, allowing for long-distance non-contact during safety production hazardous chemical accident rescue. In this study, system based on multispectral imaging is devised, which detect variety gases types by separating radiation. It...

Underwater images are degraded mainly by light scattering and color distortion. Light occurs because the is reflected deflected multiple times suspended particles in water before reaching camera. Color distortion caused due to absorption degrees vary according wavelength. At last, underwater dominated a bluish tone. In this paper, we propose novel image enhancement approach based on dark channel prior luminance adjustment. The dehazed obtained characterizes with low brightness. Then, utilize...

Many industrial gases and aerosols have rich spectral characteristics in the long-wave infrared band, which can play an important role gas detection chemical protection. In this paper, principle of Gaussian filtering establishment process operator are introduced, a noise suppression method Fourier spectrometer at various piecewise is proposed. The amplitude interference signal mapped into estimation weight, then size weight filter window selected to realize adaptive weight. Compared with...

Aiming at the static economical dispatch for microgrid ignoring inherent link between lack of each time interval, considering wind turbines, photovoltaic cells and sodium sulfur battery uncertainty factors on economic dispatch, taking minimum micro power output grid operation cost as objective function, establishment a dynamic model. Using VC + +, program is developed by using improved differential evolution algorithm. By changing crossover factor, convergence speed algorithm ability to...

The principle of Gas Identification Method for Long-Wave Infrared Hyperspectral Imaging based FTIR was described in detail. method spectral data preprocessing and calibration,radiation transfer mode, algorithm identifying concentration retrieving chemical gas,the detection limit distance were analyzed. development situation passive IR remote sensing gas cloud technique investigated,as well as the key parameters them.

It is aimed at environment pollution gases remote sensing in wide infrared spectrum, using the technique of long wavelength Fourier transform spectrometer, by extended detector responsive spectral range, to detect 'fingerprint' characteristic under certain condition. The paper specifically described experiments range 7.0 cm-1~14.5μm (700-1450 cm^-1). application example used instrument PARES100 showed, with both radiance difference and brightness temperature, 11 kinds industry...

Slim and strong hyper-redundant manipulators with long reaches can perform a variety of intra-cavity tasks in confined spaces. Benefiting from newly developed continuum mechanism its actuation scheme, this paper proposes the design manipulator 12 DoFs (Degrees Freedom). With structure synthesized an enumerative manner, is expected to navigate through arrays holes inspections or manipulations at remote locations deep cavity. Kinematics modeling, simulations, system descriptions are...

The new progress of ground-based long-wave infrared remote sensing is presented, which describes the windowing spatial and temporal modulation Fourier spectroscopy imaging in details. prototype forms interference fringes based on corner-cube Michelson interferometer, using cooled photovoltaic staring FPA (focal plane array) detector. LWIR hyperspectral achieved by process collection, reorganization, correction, apodization, FFT etc. from data cube. Noise equivalent sensor response (NESR),...

Aiming to the application of DFIG connected DC-Microgrids, an improved topology for DC-Microgrids is taken into account in this thesis. The stator side loses support voltage and frequency AC point common coupling bus. A novel control method suitable converter (SSC) rotor (RSC) proposed. independent frequency, decoupled power variable speed constant are achieved doubly-fed induction generator DC-Microgrids. which can enhance capacity active transmission during variation.

Graph neural networks (GNNs) have been widely used in graph-structured data computation, showing promising performance various applications such as node classification, link prediction, and network recommendation. Existing works mainly focus on node-wise correlation when doing weighted aggregation of neighboring nodes based attention, dot product by the dense vectors two nodes. This may cause conflicting noise to be propagated information propagation. To solve this problem, we propose a...

It is important to obtain information on an instantaneous target. A high-speed camera can capture a picture of immediate scene, but spectral about the object cannot be retrieved. Spectrographic analysis key tool for identifying chemicals. Detecting dangerous gas quickly help ensure personal safety. In this paper, temporally and spatially modulated long-wave infrared (LWIR)-imaging Fourier transform spectrometer was used realize hyperspectral imaging. The range 700~1450 cm−1 (7~14.5 μm)....

Large-scale distributed generation connecting to the distribution network will cause problem of voltage overshoot, which requires additional configuration reactive power compensation equipment. Meanwhile, different permeability supply access and photovoltaic-wind ratio also affect overshoot degree network. Considering regulation capability photovoltaic source, this paper proposes a new optimal allocation model for network, uses as equipment participate in so reduce Firstly, PV under normal...

Raman lidar is an active remote sensing technology that has been widely applied in fields such as laser atmospheric transmission, global climate prediction, aerosol radiation effects, and environment. the ability to measure target distances provide spatial depth resolution. It offers high sensitivity a long detection range without need for cooperative targets. In this study, pulsed with wavelength of 355 nm single-pulse energy 350mJ was used light source. The spectrometer system employed...

High-risk liquid chemicals inadvertently enter the surrounding environment during production, storage, transportation, and use, posing a serious threat to ecosystems human health. How quickly detect chemical contaminants has become an urgent problem be solved. In this paper, new method of short-wave infrared 0.9-1.7 μm hyperspectral imaging telemetry based on crystal tunable filter (LCTF) is proposed replace traditional contact non-imaging sampling analysis method. The dichloromethane...

Infrared hyperspectral imaging passive telemetry system is applied to chemical gas monitoring. Noise equivalent radiation brightness (NESR) an important index characterize the sensitivity of system. Firstly, theory Equivalent Spectral Radiance infrared introduced. Based on transmission and simple three-layer model, noise under area array detector deduced. Three calculation methods NESR are The principle experimental device long-wave spectrometer (CHIPED-1) developed by ourselves used...

Aiming to the voltage of stator side is generated by modulation SSC in improved topology, especially under circumstance with asymmTeric fault side, DFIG's electromagnTeic torque, amplifies ripple grid-connected power for grid side. The novel control mTehod suitable converter and rotor based on reduced-order resonant controller (RORC) proposed this thesis, torque output performance are improved. Under RORC conditions transfer functions current system established, amplitude characteristic...

The Combination of large power grid and distributed supply is recognized by electric experts as the development direction industry, which can save energy consumption, improve reliability flexibility system. Therefore, it great value to study supply. According shortcomings PI control gain at fundamental frequency small, poor effect, introducing band-pass quasi PR controller, algorithm in order finally through MATLAB simulation software test improved algorithm, verify feasibility accuracy.