Current Issue : January - March Volume : 2019 Issue Number : 1 Articles : 5 Articles
To solve the problems of color distortion and structure blurring in images acquired by\nsensors during bad weather, an image dehazing algorithm based on feature learning is put forward\nto improve the quality of sensor images. First, we extracted the multiscale structure features of the\nhaze images by sparse coding and the various haze-related color features simultaneously. Then,\nthe generative adversarial network (GAN) was used for sample training to explore the mapping\nrelationship between different features and the scene transmission. Finally, the final haze-free image\nwas obtained according to the degradation model. Experimental results show that the method has\nobvious advantages in its detail recovery and color retention. In addition, it effectively improves the\nquality of sensor images....
In the majority of applications using lithium-ion batteries, batteries are exposed to some\nharmonic content apart from the main charging/discharging current. The understanding of the effects\nthat alternating currents have on batteries requires specific characterization methods and accurate\nmeasurement equipment. The lack of commercial battery testers with high alternating current\ncapability simultaneously to the ability of operating at frequencies above 200 Hz, led to the design of\nthe presented experimental setup. Additionally, the experimental setup expands the state-of-the-art\nof lithium-ion batteries testers by incorporating relevant lithium-ion battery cell characterization\nroutines, namely hybrid pulse power current, incremental capacity analysis and galvanic intermittent\ntitration technique. In this paper the hardware and the measurement capabilities of the experimental\nsetup are presented. Moreover, the measurements errors due to the setupâ??s instruments were analysed\nto ensure lithium-ion batteries cell characterization quality. Finally, this paper presents preliminary\nresults of capacity fade tests where 28 Ah cells were cycled with and without the injection of 21 A\nalternating at 1 kHz. Up to 300 cycles, no significant fade in cell capacity may be measured, meaning\nthat alternating currents may not be as harmful for lithium-ion batteries as considered so far....
The design of zone plates is an important topic in many areas of physics, such as optics,\nX-rays, microwaves or ultrasonics. In this paper, a zone plate design method, which provides high\nflexibility in the shaping of the focusing profile, is analyzed. This flexibility is achieved through the use\nof binary sequences that produce zone plates with different properties and applications. It is shown\nthat this binary-sequence method works properly at low wavelengths, but requires a modification\nterm to work accurately in high wavelength domains. This additional term extends this powerful\ndesign method to any wavelength. Simulation results show acoustic focusing profiles for Fresnel,\nFibonacci and Cantor zone plates operating at a wavelength of 1.5 mm without any distortion....
Automated attendance management system will reduce complexity by eliminating\nplenty of manual processes involved in attendance system and calculating\nhours attended. This paper presents a simple technique of taking student\nattendance in the form of an Internet of Things (IoT) based system that\nrecords the attendance using fingerprint-based system and stores them securely\nin a database. We use Node MCUV3, RFID Module and Fingerprint\nsensor module in our system. The fingerprint module is responsible for authentication\nof the students. RFID Module is used to scan the RFID tag and\nsends data to the central server. By using this information, the system will\ngenerate an attendance report which can be accessed for further use....
The limited load capacity and power resources of small-scale fixed-wing drones mean\nthat it is difficult to employ internal high-precision inertial navigation devices to assist with the\nlanding procedure. As an alternative, this paper proposes an attitude measurement system based\non a monocular camera. The attitude angles are obtained from a single captured image containing\nfive coded landmark points using the radial constraint method and three-dimensional coordinate\ntransformations. The landing procedure is simulated for pitch angles from.....\nroll angles\nfrom....... and yaw angles from....For roll and pitch angles of approximately.....respectively, the accuracy of the method reaches....This UAV attitude\nmeasurement system obtains an attitude angle by a single captured image, which has great potential\nfor assisting with the landing of small-scale fixed-wing UAVs....
Loading....