With people’s increasing concern about food safety, cold-chain logistics distribution centre is playing an important rolein preventing from going bad. Now centres have the problems of too muchtransportation, low degree automation, unreasonable layout planning, complex process etc. It isimportant to solve these in order achieve efficient distribution. Firstly modeling and simulation for theoperation a fruits vegetables by using Flexsim software isrealized. Then paper analyses preliminary...

A photonic approach to generate triangular waveform signals is proposed and analyzed. With active bias control, two sub-MZMs (MZ-a MZ-b) of a dual-parallel Mach-Zehnder modulator (DP-MZM) operate at minimum transmission point, leaving the main MZM (MZ-c) quadrature point. Triangular can be observed by parameter setting modulation index. The proposal first analyzed then validated simulation. key significance scheme that it capable generating via sinusoid local oscillator.

We theoretically report a novel graphene-based hybrid plasmonic waveguide (GHPW) by integrating GaAs micro-tube on silica spacer that is supported graphene-coated substrate. In comprehensive numerical simulations guiding properties of the GHPW, it was found size mode (TM) can be reduced significantly to ~10-4(λ2/4), in conjunction with long propagation distances up tens micrometers tuning waveguide's key structure parameters and graphene's chemical potential. Moreover, crosstalk between two...

Foreground segmentation is a very difficult task in dynamic background, which common real-world environments, caused by for example waving foliage, rippling water or illumination changes owing to light switching etc. A large number of methods foreground background have been proposed the past decades, but most them can only handle repetitive movements gradual and fail when sudden occur. This study proposes new method, deal with both gradual/sudden changes. The authors use two-layer Gaussian...

A resonant-ring-assisted large mode area segmented cladding fiber (RR-SCF) with a high-index ring in the core is proposed. Numerical investigations of effects on leakage losses guiding modes, area, and electric field distribution FM proposed show not only increases ratio loss between fundamental (FM) higher-order modes (HOMs) but also improves to be flat. By taking these advantages high-index-ring-assisted core, effective single-mode (SM) operation achieved bent any orientation, which makes...

In the actual operation, stator magnetic slot wedge is vibrated by large alternating electromagnetic force, which causes to defect and then affect starting performance efficiency of motor.

A CCD fiber Bragg grating sensor demodulation system based on FPGA is proposed. The divided into three units: spectral imaging unit, signal detection unit and acquisition processing unit. uses reflective system, which has few aberration, small size, simple structure low cost. In the information of spectrum are accessed by detector, measurement line converted pixel position spot, multi point can be simultaneously measured, so system's reusability, stability reliability improved. drive circuit...

For the complex structure of large capacity turbo-generator in end region, accurate calculation leakage magnetic field became key factor generator design. Affected by field, there is a problem that stator ladder packets, copper screen, press plate has local high temperature. The three-dimensional electromagnetic 330 MW water-hydrogen-hydrogen region was investigated, and effect 4 packets considered process. influences extension rotor windings beyond or 10cm on losses were compared analyzed....

Tissue-specific expression quantitative trait loci (eQTLs) are always linked to specific diseases.In this study, we focused on eQTLs common multiple tissues and explored their functional mechanisms in disease for the first time.We found 11 eQTL genes among tissues.Five were validated through a genome-wide association 3 using Online Mendelian Inheritance Man database, others text mining.Most of these disorders related systemic immune system.In analyses Gene Ontology Kyoto Encyclopedia Genes...

As one of the most advanced models in computer vision, model YOLO series has excellent accuracy and efficiency. However, YOLOv5 achieved great success object detection. Even since a function image classification, we can still modify optimize Yolov5 based on structure, data augmentation, loss optimizer, attention mechanism. Based above problems, replaced backbone with RepVGG as network our model. We also used methods such Cutout, HSV, etc., for augmentation. introduced CBAM (Convolutional...

A new method which makes use of the variable accelerated motion servo motor is presented to fabricate triangular fiber Bragg grating. Considering exponential relationship between changes grating refractive index and exposure UV laser, this only requires one exposure, controlled by computer program control increment laser linear change on axial, then edge can be gained. The experiment result shows that has a good linearity, bandwidth 1.6nm, used 1nm, maximum reflectivity 90%. As sensor...

The unified coupled-mode formalism derived from Maxwell's equation is employed to analyze the add/drop filters using a Bragg grating assisted mismatched coupler. An filter grating-assisted coupler fabricated and tested. maximum reflectivity, 3dB bandwidth, insert loss at drop port reflective input of are measured be about 12 dB, 0.2 nm, 3.91 dB - 7.39 respectively.

An add/drop filter using a Bragg grating-assisted mismatched coupler is fabricated. The maximum reflectivity, 3dB bandwidth, insert loss at the drop port and reflective input of are measured to be about 12 dB, 0.2 nm, 3.91 dB -7.39 respectively.

A Broadband add/drop filter using a linearly chirped Bragg grating-assisted mismatched coupler is fabricated. The maximum reflectivity and 3dB bandwidth of the at drop port are measured to be about 20 dB 0.8 nm, respectively.