Results 91 to 100 of about 1,487,802 (240)

Data ambiguity in passive radar tracking

, 2022
S.349-354A multistatic passive radar system exploits third party transmitters like radio or television transmitters for target surveillance. Signals of non-cooperative illuminators are generally not designed for radar purposes resulting in possibly low ...
Brotje, M., Nickel, U.
core   +1 more source

Observability-Based Gaussian Sum Cubature Kalman Filter for Three-Dimensional Target Tracking Using a Single Two-Dimensional Radar

Remote Sensing
This paper considers the problem of tracking a three-dimensional target under the condition that only a single two-dimensional radar is available. Since a two-dimensional radar can only measure the slant range and azimuth information relative to the ...
Haonan Jiang, Yingjie Zhang, Xiaotong Wang, Yuanli Cai   +3 more
doaj   +1 more source

Electron‐Rich Nickel Enabled by Charge Transfer in Multimetal Nanostructures for Efficient Ammonia‐to‐Hydrogen Conversion

Advanced Science, EarlyView.
A charge‐transfer‐engineered Ni catalyst derived from an atomically mixed layered precursor enables efficient ammonia‐to‐hydrogen conversion. Cr‐to‐Ni electron transfer creates electron‐rich Ni active sites that favor NH3 adsorption, modify the dehydrogenation energetics, and weaken N2 binding to facilitate product desorption. This electronically tuned
Donghyeok Kim, Su‐Jin Kim, Gayeong Kim, Hyoseok Kim, Jongkyoung Kim, Myeung‐Jin Lee, Bora Jeong, Minkyu Kim, Hong‐Dae Kim, Seungho Cho   +9 more
wiley   +1 more source

Multi-Radar Bias Estimation Without a Priori Association

IEEE Access, 2018
A solution for multi-radar bias estimation without a priori association is provided for a decentralized multi-radar tracking system. We describe the systematic bias of radar with random finite sets by a pseudo-measurement of bias, which is derived at the
Tao Zhang, Hai Li, Lei Yang, Weijian Liu, Renbiao Wu   +4 more
doaj   +1 more source

A Compact and Fast Single‐Spike TTFS Encoder With Ultralow Operating Voltage for Efficient Neuromorphic Fourier Transform

Advanced Science, EarlyView.
A Pt/TaOx/V single‐spike TTFS encoder achieves ultralow‐voltage (∼0.35 V), high‐speed (∼100 ns) operation with simplified circuitry. Integrating bipolar nonuniform temporal encoding with a spiking‐DFT neuron model enables a neuromorphic FFT framework. Device‐calibrated simulations demonstrate high spectral fidelity across multitone, speech, and chirp ...
Yang Wu, Qi Wei, Junfeng Zhang, Lirou Su, Ning Mao, Beibei Huang, Jiaying Chen, Dian Huang, Shengzhong Feng, Yishu Zhang, Shuai Zhong   +10 more
wiley   +1 more source

Enhancing radar tracking accuracy using combined Hilbert transform and proximal gradient methods

Results in Engineering
Accurate radar tracking is crucial in defense, navigation, and surveillance applications, where high precision and resilience to noise are essential. Traditional radar tracking techniques, such as Kalman Filters and Particle Filters, often struggle with ...
Ayesha Jabbar, Muhammad Kashif Jabbar, Asif Jabbar, Ahmed S. Almasoud, Faijan Akhtar, Maryam Zulfiqar, Tariq Mahmood, Amjad Rehman   +7 more
doaj   +1 more source

Ionically Counter‐Programmable Phase‐Separation of Superstable Star‐Biopolyamide Coacervates for Electrothermally‐Responsive Pseudosolid Smart Windows

Advanced Science, EarlyView.
We develop bio‐based, star‐branched polyamides from itaconic acid and cadaverine with tunable lower critical solution temperature (LCST) transitions for dynamic solar modulation. Specific metal ion coordination with pyrrolidone moieties drives precise phase transitions via calcium‐induced salting‐in and sodium‐induced salting‐out mechanisms. Formulated
Jie Liu, Xiaotian Zhu, Jinjian Hou, Jinze Du, Mohammad Asif Ali, Maiko K. Okajima, Tatsuo Kaneko   +6 more
wiley   +1 more source

A Networked Radar Beam Allocation Method for Multi‐Target Tracking in Multi‐Jammer Scenario

IET Radar, Sonar & Navigation
This paper focuses on the problem of mainlobe interference suppression in radar networks tracking multi‐target scenarios with multiple jammers. A beam allocation method is proposed based on stepwise suppression of mainlobe and sidelobe interference ...
Lei Zhang, Linghua Su, Ying Luo, Jianfei Ren, Qun Zhang   +4 more
doaj   +1 more source

Toward Rational Design of Aqueous Battery Membranes Beyond the Selectivity‐Conductivity Trade‐Off

Advanced Science, EarlyView.
This review examines sulfonated membranes for redox flow batteries. It focuses on proton transport mechanism, membrane design, performance limits, optimization strategies, and the pathway from molecular design to membrane manufacturing. ABSTRACT Electrochemical energy‐storage systems increasingly require membranes that can simultaneously deliver fast ...
Jinkang Liu, Mingbo Xie, Zhenghao Wang, Huacun Li, Jun Xie, Pan Liu, Qingwei Wang, Xu Yan, Meiqing Shi, Liyuan Chai, Yue Luo, Zining Tang, Rui Tan, Liyuan Zhang   +13 more
wiley   +1 more source

RCS–Doppler-Assisted MM-GM-PHD Filter for Passive Radar in Non-Uniform Clutter

Sensors
In passive radar, the multiple model probability hypothesis density (MM-PHD) filter has demonstrated robust capability in tracking multi-maneuvering targets.
Jia Wang, Baoxiong Xu, Zhenkai Zhang, Biao Jin   +3 more
doaj   +1 more source