As an unconventional gas reservoir, bauxite reservoirs have often been studied as weathered crust cover layers rather than in the past. The Taiyuan Formation Longdong area of Ordos Basin has achieved breakthroughs, and some wells obtained industrial airflow. Therefore, it is necessary to conduct basic geological research on reservoir. application casting thin sections, scanning electron microscopy (SEM), X-ray diffraction (XRD), high-pressure mercury injection (HPMI), low-temperature...

A fast multiple correlated sampling technique based on successive approximation register analog-to-digital converter (SAR ADC) for low-noise CMOS image sensors is proposed in this paper. During the whole operation of sampling, m-times samplings and conversions are achieved. The SAR ADC completes a full conversion first only converts lower M bits following to decrease total time. influences three factors, number samplings, converted repeated resolution ADC, analyzed detail. 12-bit with...

In this paper, a digital correlated double sampling (CDS)-based 10-bit Single-Slope Analog-to-Digital Converter (SS ADC) with error quantification and reset technique for CMOS image sensor is proposed. The SS ADC circuit block contains ramp generator, parallel counters comparators. (EQ) adopted to reduce the clock numbers that are counted in counter power consumption during whole digitizing process. To improve speed of ADC, introduced complete CDS (DDS) operation one ramp, 256 clocks saved...

The fluid-thermal coupled problem of underwater Oil-Filled Brushless DC Motors is studied in this paper. influence accurate calculation heat transfer coefficient on the results temperature field fully considered, 3D model motor while actual windings was simplified by equivalent method and fluid internal oil external seawater are established use Finite Volume Method to calculate field. According results, paper proposed that it have an end effect at which make shell surface decrease....

A new readout architecture for single-bit quanta image sensor (QIS) consisting of a capacitive transimpedance amplifier (CTIA) before 1-bit quantizer to improve the threshold uniformity cluster is proposed in this paper. The previous QIS had significant non-uniformity likely caused by fluctuation common-mode voltage jot output. To guarantee stability input signals fed quantizer, CTIA added quantizer. pipeline operation mode also so and ADC can work at same time, thereby reducing power...

The close coupling between cyber and physics makes malicious attacks seriously affect the security of power system. Firstly, this paper analyzes possible attack scenarios, establishes graph model, proposes calculation method probability. On basis, combined with stability control business, impact on primary system is analyzed, risk assessment proposed. Finally, an example illustrates improvement - physical analysis, proves that analysis technology has a good application prospect.

As multi-infeed HVDC systems are fed into the AC grid, problem of insufficient dynamic power reserve and voltage support receiving-end grid is increasingly prominent. Short-circuit capacity short- circuit ratio system, transient level, DC commutation failure probability before after installation synchronous condenser compared by simulation. The results prove application effect in inverter station. Combined with operating characteristics condenser, law system recovery time changing constant...

A 1024 × 896 test chip is presented in this article to explore a low-power readout circuit for multi-bit quanta image sensor (QIS). Five well-known analog-to-digital converter (ADC) approaches [flash, pipeline, successive approximation register (SAR), cyclic, and single-slope (SS)] are studied, two types of ADCs, namely, SAR ADCs SS implemented the sensor. The ADC power dissipations compared under condition constant imaging throughput counting photoelectrons. In QIS devices, one LSB...

We obtain in this paper a precise estimate of upper bound the Hausdorff dimension global attractor for damped semilinear wave equation with critical exponent. The obtained decreases as damping grows and is uniformly bounded large damping, which conforms to physical intuition. results generalize correct corresponding by Zhou recently.

A digital calibration scheme to correct the nonlinearity caused by finite amplifier gain and capacitor mismatch for cyclic analog-to-digital converter (ADC) is presented. The block of correcting weight jumping points implemented in which adders registers are utilized without multipliers reduce silicon area cost. Each shared five ADCs. Ten switches added into 1.5-bit multiplying digital-to-analog choose test input signal set value most significant bit measuring heights points. errors measured...

Developing a facile antisolvent-free method to prepare high-quality perovskite thin films is crucial for their applications in large-area image sensing. Herein, this work adopted methylammonium chloride (MACl) the precursor promote nucleation and growth of FA <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.7</sub> Cs xmlns:xlink="http://www.w3.org/1999/xlink">0.3</sub> PbI xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> without using any...

This paper presents the analysis and implementation of a low-voltage low-power incremental feed-forward modulator for CMOS image sensors, which is realized in standard 65 nm technology. A architecture an integrator based on class-C inverter are employed this modulator. Aiming to increase signal-to-noise ratio (SNR) gain-boost technology applied In order optimize satisfy requirement conversion speed modulator, accurate mathematical expression charge transfer process established. operates 1-V...

In this study, an event-driven detection method based on pseudo-differential self-timed inverter-based incremental sigma-delta analogue-to-digital converter (IDC) is proposed and analysed, which adapted for sparse signal measurement. A judgment module implemented to detect whether the input of measurement system beyond a threshold or not. The will be converted by IDC only when it threshold. also in technique. technique designed simulated with 1.5-V supply voltage. achieves 12.8-bit ENOB at...

The security and stability control system is pivotal in maintaining the secure stable operation of power system. escalating number objects, broadening scope, intensifying coupling, increasing complexity have exposed limitations current simulation verification methods. Moreover, existing digital methods inherent constraints that restrict range scenarios. To mitigate these challenges, this paper introduces a modelling approach for systems integrates twin technology. conceptualization...

SSCS plays the essential role in power grid operation to ensure control reliability and effectivity. Due system becomes more complex, it is inevitable improve simulation technology for SSCS. Thus, a digital-physical hybrid platform required. In this paper, requirements of are analyzed focus on design communication schemes simulation. IEC61850 Aurora based technical roadmaps proposed between RTDS DSSCHP. Also, two options available SSCDs