Platform oscillation is a crucial error source that undermines the geometric performance of satellite imagery. In this paper, an approach for detection utilizes parallax observation between multispectral bands proposed. Due to configuration sensors, attitude ZY-3 can be detected and estimated by disparities adjacent band images. The are obtained through high-accuracy image matching method based on phase correlation at subpixel level. pixel displacements caused then retrieved from use two...

Abstract We present a non-return-to-zero (NRZ) superconductive voltage driver (SVD) for interfacing single flux quantum (SFQ) circuits with semiconductor circuits. The NRZ SVD design consists an encoding module, splitter networks, sixteen RS flip-flops (RSFFs), and sixteen-stage DC SQUID array (DSA). By employing asymmetric structure, the achieved simulated output swing of 4.3 mV. impedance quality factor formulas DSA were provided. solved issue slower fall time caused by inserting...

Abstract Deep learning is a new field in machine learning, which based on the neural network model to extract features by simulating human brain cognition. Image recognition an essential subject of deep and has made significant progress recent years. In training process, only computer needs cooperate, no personnel need participate process get good image effect. This paper makes in-depth analysis application recognition, discusses necessary steps trial basic principle network, puts forward...

In this article, a novel digital dual-loop interleaving control algorithm is proposed for an asymmetric multiphase buck converter to further enhance the transient response under large load step and ultrafast slew rate. The dual loop consists of nonlinear average current integration constant <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</small> -time (DICOT) controlled voltage loop, which are connected. normal phases with aim deliver majority...

Summary In this paper, a multiphase digital control called integration constant on‐time (DICOT) is proposed, which applies the concept of signal accumulation, solves drawbacks ripple‐based COT that switching frequency and transient performance are affected by A/D sample delay sampling noise. Besides, interleaving approach proposed DICOT well‐suitable for no higher calculation required compared to single‐phase. aspect current balance, almost all existing researches work on analog balance...

A novel broadband compact lumped-element balun with a tail inductor is proposed in this letter. The employment of improves amplitude and phase balances for better performance. Furthermore, compared baluns utilizing conventional micro-strip approaches or second-order lattice topology, topology offers significant circuit size reduction. Theoretical analysis the optimized value presented to improve operation bandwidth. concept realized validated by 2.45 GHz surface mounted devices (SMD)....

With the improvement of data center processing performance, voltage regulator module (VRM) structure 48-V bus is being proposed more and to improve system efficiency reduce cost center. For a 48–1.8-V VRM, quasi-parallel configuration, sigma converter, shown have peak 95.2% power density 700 W/in3 <xref ref-type="bibr" rid="ref16" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[16]</xref> . In order accurately compensate design converter meet VRM...

With the demand for fast transient response of voltage regulator module (VRM), current mode controls are used to achieve high bandwidth control, which brings need inductor feedback. The sampling is one major issues in digital because complex sensing circuit and noise, as well increasing design complexity cost multiphase applications. In this paper, a high-resolution estimation algorithm proposed, samples input output calculates by filter. makes it possible avoid using high-speed Analog...

High electron mobility transistors (HEMTs) and cryogenic cooling are widely employed in high gain low noise millimeter-wave amplifiers. By using the temperature dependant model of HEMT, this paper further investigated optimum impedance matching for amplifiers (LNAs) to exhibit a significant improvement performance under temperatures. One MMIC LNA covering 26-40 GHz frequency band has been developed on GaAs substrate with 0.15 ¿m pHEMT devices, it was measured on-wafer in-module at operating...

RF signals are vulnerable to multipath, noise and interference. Most localization algorithms trying create a similarity based relationship between signal measurements propagation distance or tag location. So it's huge challenge realize precise for real applications. In this paper, we propose novel passive UHF RFID algorithm on fluctuation, FBL algorithm. Not considering similarity, use fluctuation as the neighboring criteria. According our experimental results, with metal shelf covered...

The continuous improvement of processor performance has promoted the development 48V voltage regulator modules (VRMs), making it more and popular in data center applications. sigma converter is a quasi-parallel structure, which composed an unregulated LLC regulated Buck connected series from input side parallel output side. Reference [1] shows that peak efficiency reaches 95.2%, power density $700\mathrm{W}/\mathrm{in}^{\wedge}3$, obvious advantages compared to similar single-stage...

Abstract Renewable energy with high resource potential and less environmental pollution are receiving more attention. Wind power is a relatively mature source in renewable energy. As the internal external uncertainty of wind industry chain various complex, it urgent to clarify relationship. Through big data technique, main impacted on development identified. And an interpretative structural model established analyze hierarchy structure uncertainty. The results can provide valuable reference...

With the development of processor performance data center serves, power supply requirements have become more and restrict. The 48V input system is proposed to reduce impedance losses entire system. quasi-parallel architecture one typical single-stage VRMs designed for One biggest challenges converter design that a novel its structure relatively distinctive, so there limited number modelling research makes it difficult realize accurate close-loop control design. Some existing researches give...

In order to achieve fast transient response without secondary overshoot, this paper purposes a digital control algorithm of Single-cycle Charge Regulator (SCCR) control. The SCCR has three paths, namely the path, neutralization and slow path. first cycle switching, path with multiple sampling per is used perform rapid energy changes make output voltage return reference value; in next cycle, term single offset excessive change so that inductor current can quickly reach new balance avoid...

To meet the requirements of faster transient response in multiprocessor power supplies, this paper proposes a new auxiliary circuit that can be shared between several loads. The connect to any load during by reconfiguring energy path. Costs and space are further saved since only one is needed, no matter how many processors system has. design explained implemented as two-phase interleaved buck converter with switches. Simulation results for 250A step current slew rate ±1200A/μs experimental...

A compact quadrature hybrid coupler with harmonic suppression using lumped-element band-stop resonator is proposed for bandwidth improvement. Conventionally, rejection realized by three resonators in lumped hybrids. The of realizes better while exhibiting narrower frequency response. So as to improve operation behavior, the number applied topology minimized one. Trading ofi acceptable reduction rejection, enlarges working fewer numbers devices. Detailed design and theoretical analysis are...

In this paper, a fully integrated monocycle pulse based impulse radio ultra-wideband (IR-UWB) transmitter designed and fabricated with SMIC 0.13-μm RF CMOS technology is reported for UWB application specified in China. The generated binary phase modulated by all-digital generator modulator low power consumption. A driver amplifier followed to filter further shape the pulses. Measured circuit performance achieves frequency band 4.2-6 GHz, amplitude of about 270 mV at 100 MHz repeating frequency.