We perform simulations of a two-fluid–structure interaction problem involving liquid–gas flow past fully submerged stationary circular cylinder. Interactions between the interface with finite surface tension and disturbances arising from cylinder induce variety interfacial phenomena wake structures. map different regimes in parameter space defined by Bond number $Bo \in [100, 5000]$ submergence depth $h/D [1, 2.5]$ while keeping Reynolds ( Re ) Weber numbers fixed at 150 1000, respectively....

A simple and perfectly current matched charge pump for ultra-low voltage applications in phase-locked loops is presented. The based on a gate switching architecture to ensure the output dynamic range. specially designed dual compensation circuits using high threshold transistors together with regular mismatch below 1.5% while keeping ranging from 0.02 0.76 V 40 nm CMOS Mixed-signal technology at 0.8 supply. And additional body bias circuit reduces negative impact process variation. proposed...

This paper presents a design of 100 kHz 0.54 µW fully integrated current-mode relaxation oscillator. The transistors in the sub-threshold region, comparator, current-starving RS flip-flop are used to reduce power consumption. Meanwhile, employing significantly reduces sensitivity frequency supply voltage fluctuation. temperature coefficient is 51 ppm/°C from −40 85 °C, and line regulation −0.40%/V over range 1.0 2.0 V. oscillator designed SMIC 0.18 µm CMOS technology operates at minimum V...

This brief presents a self-calibration technique for on-chip precise clock generator used in the field of power electronics. In this technique, operating frequency grid is employed as reference to eliminate variation introduced by fabrication process. To demonstrate effectiveness an relaxation oscillator has been designed, analyzed and verified with 0.5-μm standard CMOS technology. Measurement results show operates at about 103.7 kHz draws 90 μA current from 5-V supply. 2.83% (3σ) achieved,...

As parallel and distributed computing gradually becomes the standard for large scale problems, domain decomposition method (DD) has received growing attention since it provides a natural basis splitting problem into many small which can be submitted to individual nodes processed in fashion. This approach not only solve problems that are solvable on single computer by using direct sparse solvers but also gives flexible solution deal with localized non-linearities. When some parts of structure...

We present a software-hardware cooperative method for multi-projector seamless tiled display system, and it mainly consists of two steps. Firstly, an ordinary PC (Personal Computer) is used to preprocess the system with software. Secondly, one or more hardware image processors, which are based on FPGAs (Field Programmable Gate Arrays), process source video without aid computers. And optimized algorithm in method. Experimental results show that proposed effective low cost high performance.

Due to the actual situation, when carrying out research on principle of low-voltage distributed PV power station, we should make process survey and determination measurement program. And working-out connection scheme first station in Liaoning region is stated. After discussing difficult problem development scheme, next phase direction proposed.

An analog integrated maximum power point tracking (MPPT) controller which is suitable for distributed MPPT (DMPPT) topology presented in this paper. Without large numbers of external circuit components, the DC/DC converter together with its can be made small enough to into junction box, practical and cost effective DMPPT topology. Besides a negative feedback loop used proposed system make output voltage PV panel less susceptible fluctuations irradiation intensity interference switching...

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<title>Abstract</title> Minerals are crystalline solids manifesting various symmetries in their ordered structures despite high-energy defects seated atomic templates. Twin boundaries imperfections affording energy reduction through reflection, rotation, or inversion of the crystal lattice, forming symmetrical intergrowths. Quartz is one many minerals that twins as a rule, yet its most common twin rarely seen without destructive analysis. Disguised crystal, this penetrative abides by...

Abstract We consider the performance of sparse linear solvers for problems that arise from thermo‐mechanical applications. Such have been solved using direct schemes enable robust solution at expense memory requirements grow non‐linearly with dimension coefficient matrix. In this paper, we a class preconditioned iterative as limited‐memory alternative to schemes. However, such typically exhibit complex trade‐offs between reliability and performance. therefore characterize systems by...

This paper presents an innovative method to decrease the discreteness of minimum tripping current for type A residual operated circuit breakers (RCCBs). Different but continuous time intervals’ detection is proposed identify current’s and judge whether its root mean square (RMS) value has exceeded rated in one cycle. That is, after timer started, 0–3 ms ±135° leakage detected, 3–7 ±90° 7–12 ±0° 12–16 AC detected. What’s more, fabricated a mixed-signal 0.5 µm CMOS process, test results show...