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Target identification is a challenging task under land backgrounds for the millimeter wave (MMW) seeker, especially under complex backgrounds. Focusing on the problem, an effective method combining correlation matching and beam pointing is proposed in this paper. In the beginning, seeker scanning for target detection is conducted in two rounds, and target information of the detected targets is stored for correlation matching. Point or body feature judgment is implemented by using high resolution range profile (HRRP). Then, the error distribution zone is constructed with the beam pointing as the origin. In the end, we identify the target by searching the one which lies in the closest error distribution from the beam pointing center. The effectiveness of the proposed method is verified by using mooring test-fly and real flight data.
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http://dx.doi.org/10.3390/s19112530 | DOI Listing |
J Chem Phys
September 2025
Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India.
We introduce a novel method using a kilohertz (kHz) amplified 800 nm laser for the first experimental confinement of microparticles within a single beam. This study demonstrates that high-energy kHz pulses can confine 1-μm-radius polystyrene beads in water within ∼26 μm. This approach utilizes the unique properties of high-energy pulsed lasers, distinct from continuous-wave and megahertz pulsed lasers traditionally used in optical trapping.
View Article and Find Full Text PDFNanoscale Adv
August 2025
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum DresdenRossendorf 01328 Dresden Germany
Ion irradiation has routinely been used to create defects or even pattern two-dimensional (2D) materials. For efficient defect engineering, that is, choosing the proper ion fluence to achieve the desired concentration of defects, it is of paramount importance to know the probability of creating defects as a function of ion energy. Atomistic simulations of ion impacts on 2D targets can provide such information, especially for free-standing systems, but in the case of supported 2D materials, the substrate can strongly affect defect production.
View Article and Find Full Text PDFJ Dent
September 2025
State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.. Electronic address:
Objectives: This retrospective study evaluates alveolar bone remodeling patterns and their association with incisor displacement in adults undergoing clear aligner therapy with premolar extractions for Class II malocclusion correction.
Methods: Cone-beam computed tomography (CBCT) scans of 38 maxillary and 37 mandibular incisors were analyzed. Displacement vectors for four anatomical landmarks (cusp tip [C], root apex [R], root neck midpoint [M], labial cementoenamel junction [L]) were quantified.
J Dent
September 2025
Maxillofacial Prosthodontist, Surgical Prosthodontist Private Practice Fort Lee, NJ, and Manhattan, New York, USA. Electronic address:
Objectives: Precise implant placement in the anterior and posterior maxilla often presents challenges due to variable bone and soft tissue anatomy. Many clinicians elect a freehand surgical approach because conventional surgical guides may not always be easy to design, fabricate, or utilize. Guided surgery has been proven to have advantages over freehand surgical protocols and therefore, the present study proposed utilizing the nasopalatine canal (NPC) as an anatomical reference and point of fixation for a novel rotational path surgical template during computer-aided implant surgery (CAIS).
View Article and Find Full Text PDFPhys Med Biol
September 2025
Nuclear Research and Development Center, TINT, 9/9, Nakhon Nayok, จ.นครนายก, 26120, THAILAND.
Background: Single-isocenter multiple-target (SIMT) treatments are a robust beam delivery technique involving modulated multileaf collimators for off-axis targets. SIMT requires quality assurance (QA) for both dosimetry and geometry to ensure accurate beam delivery according to the treatment plan. A primary challenge in SIMT QA is the need for phantoms capable of evaluating both dosimetric and geometric accuracy.
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