The role of HMGB1 in inflammation and autophagy has garnered increasing attention; however, its impact on the activation dendritic cells (DCs) remains unclear. This study aims to explore effects DC activation, autophagy, influence CD4+ T cell responses a bleomycin-induced pulmonary fibrosis (PF) mouse model. Thirty mice were randomly divided into control model groups. group was established by intratracheal injection bleomycin induce PF. Flow cytometry used detect surface markers, western...

In the high-resolution, wide-swath imaging application of spaceborne synthetic aperture radar (SAR), Digital Beam-Forming (DBF) technique can be employed to receive and handle echo data with multiple channels in elevation, for purpose increasing gain Signal-to-Noise Ratio (SNR). According geometric relationship among these channels, this paper analyzes impulse response function arbitrary elevation channel, derives its explicit expression. Based upon this, an improved DBF processing scheme,...

A synthetic aperture radar (SAR) raw data simulator of distributed target scenes is an important tool for testing the system parameters, imaging algorithms, and so on, particularly these recently proposed novel modes. The Terrain Observation by Progressive Scans (TOPS) mode achieves wide-swath coverage overcomes major drawbacks in ScanSAR electronically steering azimuth beam along track during whole acquisition time. In this letter, a TOPS generation approach from conventional wide-beam SAR...

Accurate prediction of the remaining useful lifetime power transformers plays a crucial role in effective operation and health maintenance entire grid. Machine-learning based data-driven solution is on mitigating high financial time costs induced by traditional schemes, however, this limited data distribution, volume, quality, variations scenarios, making it difficult to achieve good performance. To address concern, self-adjusting domain adversarial transfer learning (SDATL) algorithm for...

The trajectory for the geosynchronous synthetic aperture radar (GEO SAR) is complicated and ship target moving combines not only translational motion but also 3-D rotate with different state of sea, echo simulation in unified coordinate system become a vital problem. A new method presented. This can simulate real geometry satellite earth; moving, as well (yaw, pitch, roll) dif-ferent sea. effectiveness verified through theoretical ISAR imaging. It foundation following imaging GEO SAR.

This paper discusses in detail the development of several research hotspots Low-Density Parity Check (LDPC) codes and their joint optimization design with other communication technologies, points out that LDPC have broad application space future field.

We propose a Non-Local despeckling approach by using the new pixel-relativity measure, based on ratio distance, and thresholding pixel-similarity. Firstly, model distance is obtained transforming joint probability density function of two pixels having same reflectivity. Then table pixel-similarity threshold, as SAR image look number neighboring reflectivity ratio, trained according to minimum error criterion. Finally, threshold used select similar from searching window for real estimation....

For the multi-channel receive system integrated by hundreds of TR microchips, it is difficult to measure noise figure one single branch using a universal two-port analyzer, because from all branches mixes with each other while amplifiers power up simultaneously. This paper presents novel measurement approach tackle this problem, which features appending divider at input ports and changing attenuator two times obtain branch. With advantages such as high efficiency, small test errors...

By comparing the research status of BCH codec based on DVB-S2 standard at home and abroad, it is pointed out that important to realize high-speed small size parallel circuit improve system performance. Finally, two kinds data synchronization techniques using unified time reference between receiver transmitter are introduced, which symbol frame synchronization.

In this paper, basing on the region character presented by width of road in SAR image, a new extraction frame, combing image dynamics with watershed transformation, is constructed. Firstly, calculation researched, and fast ridge dynamics, which performed uniting one dimension different directions, proposed. Then, used to extract seeds. Finally, regions, belong results transformation contain seeds, are merged for extraction. Both bright lines dark images extracted constitute comparatively...

The imaging time of the Geosynchronous Synthetic Aperture Radar (GEOSAR) system is up to thousands seconds. long-term operation multiple devices during process GEOSAR can easily cause phase each device change with temperature. This leads deterioration azimuth correlation and affects performance system. In order solve this problem, thesis designs implements an on-orbit temperature compensation method for uses a combination software hardware, adds three FLASH memory chips hardware circuit...

Spaceborne SAR payload test on the ground is an important method to evaluate On-orbit performance of satellite, with massive increase sampling data geosynchronous orbit SAR, demand for efficiency and simplify system gradually growing. In this paper, a novel echo simulation imaging fixed delay signal proposed, which can greatly shorten time improve efficiency. The experimental results show that realize evaluation point target real GEO system. It has high practical value test.

Interpolation of point target and profile extraction side lobe direction are the key steps SAR image evaluation. Based on correspondence between time domain frequency features targets, this paper proposes an interpolation method based spectral targets. Firstly, a complete spectrum is obtained by segmentation extended spectrum, then corner detection performed extracted spectrum. Finally, zeros added to achieve time-domain interpolation, angle sidelobe expansion calculated according results...