Conventional Shack-Hartmann wavefront sensors (SHWFS) struggle to balance reconstruction accuracy and dynamic range under limited sub-aperture pixel arrays. In response this, we innovatively propose a SHWFS based on binary phase grating modulation. The principle is that by mapping the tilt onto phase, amount of information spot image can be effectively increased, thereby enhancing detection accuracy. This method resolves accuracy-dynamic trade-off, enabling high-precision condition low-pixel...

The limited spatial sampling rates of conventional Shack–Hartmann wavefront sensors (SHWFSs) make them unable to sense higher-order distortion. In this study, by etching a known phase on each microlens modulate sub-wavefront, we propose higher-resolution reconstruction method that employs modified modal Zernike algorithm, in which the matrix contains quadratic information is extracted using neural network. We validate through simulations, and results show once network has been trained, for...

A procedure for reanalysis of structures subjected to various layout modifications is presented. The based on exact analysis the initial design. It suitable all types changes, including general case in which some members and joints are added, other deleted, joint coordinates modified. In particular challenging addition joints, where number degrees freedom increased, a simple modified design first carried out Further changes then applied latter shown that, limited truss structure, an solution...

The coupling model of defect and organic contamination was presented to analyze the effects on laser-induced damage understand degradation mechanism optical films in a closed vacuum environment. distributions temperature rise around an absorbing multilayer ZrO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /SiO were computed based finite-element simulation. Laser induced tests made compare with theoretical model. Test results agreement...

The shooting and measurement of high-speed moving objects has always had a lot use in scientific research production, this demand been promoted from the daytime to night, but night vision camera are low frame rate, order existing equipment achieve high-frequency image acquisition, paper adopts combination multi-phase group sequentially triggered shooting, nighttime supplemental light method, frequency doubling technology camera.

As the number of wavefront sensor subapertures and deformable mirror actuators in adaptive optics systems increases, computational time direct gradient control algorithm is excessively long, which a major factor affecting performance systems. The paper combines preprocessing techniques with sparse matrix multiplication to reduce complexity algorithm. And convergence stability iterative are optimized. For an optical system 1201 actuators, efficiency proposed increased by 5 times. larger scale...

Abstract With the increasing exploitation of marine gas, electric submersible pump technology has attracted more and attention. Under influence bad underground environment, insulation performance will gradually deteriorate during its operation, resulting in current leakage, causing phase-to-phase open circuit, fire or leakage to ground other dangerous phenomena, which brings destructive damage equipment. In order solve this problem, paper designs a real-time monitoring system for based on...

Aiming at the main characteristics of high water cut, low liquid production and permeability oilfield wells in my country good development prospects thermal flow monitoring, this paper will establish a theoretical model measurement method for based on method. This analyzes principle constant temperature difference detail, adopts ARM, PT1000 sensor Linux operating system to obtain data analyze process it, so as achieve purpose measurement. It mainly uses heating rod heat fluid. Two platinum...

A procedure for reanalysis of structures subjected to various layout modifications is presented. The based on exact analysis the initial design. It suitable all types changes, including general case in which some members and joints are added, other deleted, joint coordinates modified. In particular challenging addition joints, where number degrees freedom increased, a simple modified design first carried out Further changes then applied latter shown that, limited truss structure, an solution...

This paper describes the overall architecture of speech recognition system and functional design principle each part, including structure module, software development flow chart. is based on STC89C52 single-chip microcomputer LD3320 chip as hardware core, to receive voice signal processing, complete control module. In this system, spoken by people received chip, then analyzed frequency spectrum, eigenvalue are extracted compared with keywords in keyword list, find out highest matching degree...

under the background of flight test data analysis's digital transformation demand, this paper puts forward Model-based flight-test labeling and rapid analysis technology in analysis. On basis standard point library, build model. With key technologies such as time sequence database, feature extraction human-computer interaction analysis, established visual platform that has been verified applied This meet user demand improved efficiency task telemetry monitoring.