A5057614295- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Dielectric properties of ceramics
- Microwave Engineering and Waveguides
- Electrical Fault Detection and Protection
- Graph theory and applications
- Antenna Design and Analysis
- Mobile Ad Hoc Networks
- Integrated Circuits and Semiconductor Failure Analysis
- Power Systems and Technologies
- Smart Grid and Power Systems
- Risk and Safety Analysis
- Matrix Theory and Algorithms
- Opportunistic and Delay-Tolerant Networks
- Advanced Computational Techniques and Applications
- Occupational Health and Safety Research
- Fluid Dynamics and Thin Films
- Wireless Sensor Networks and IoT
- Energy Harvesting in Wireless Networks
- Water resources management and optimization
- Education and Learning Interventions
- Fluid Dynamics and Turbulent Flows
- Ga2O3 and related materials
- Technology-Enhanced Education Studies
Xi'an Jiaotong University
2006-2025
Shandong University of Technology
2011-2024
Ministry of Transportation of Ontario
2011
In developing low-temperature cofired ceramic (LTCC) technology for high-density packaging or advanced packaged electronics, matching the coefficient of thermal expansion (CTE) among components is a critical challenge to improve reliability. The CTEs solders and organic laminates are usually larger than 16.0 ppm °C1-, while most low-permittivity (εr) dielectric ceramics have less 10.0 °C1-. Therefore, good CTE match between required further LTCC applications. this paper, we propose high-CTE...
Abstract The rapidly ever‐growing wireless communication demands development of low loss, ultralow sintering temperature dielectric ceramics with excellent microwave properties. In this work, fabrication and properties novel composite (1 − x )(Na 0.5 Bi )MoO 4 – BaMoO ( = 0.3–0.6), in short as ((1 )NBM– BM), synthesized via solid‐state reaction method an is reported. X‐ray diffraction analysis confirms the coexistence both (Na scheelite phases. Scanning electron microscopy demonstrated dense...
Affected by the downstream load of line, low-voltage ac series arc fault signal presents nonlinear, nonstationary, and random characteristics, which bring great difficulties to extraction features lead low detection accuracy. To solve this problem, a method based on strong discriminative sensitive components is proposed. In work, first, current collected self-built experimental platform, are obtained complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) method. Second,...
The β-Ga 2 O 3 ceramic exhibits excellent dielectric properties with a Q × f of 133 140 GHz and ε r 9.57. A sub-6 patch antenna was designed fabricated using Ga substrate, showing great potential for high-frequency applications.
This paper investigates the problem of computing optimal trajectories multiple data MULEs (e.g., robots, vehicles, etc.) to minimize collection latency in wireless sensor networks. By relying on a slightly different assumption, we define two interesting problems, k-traveling salesperson with neighborhood ( k-TSPN) and k-rooted path cover k-PCPN). Since both problems are NP-hard, propose constant factor approximation algorithms for them along simpler heuristic algorithms. We also conduct...
Abstract (Co x Zn 1– )TiNb 2 O 8 ( = 0.2–0.8) microwave dielectric ceramics were synthesized via the conventional solid‐state reaction route, and correlation of properties on crystal structure was discussed. Crystal structures ceramic samples systematically investigated by X‐ray powder diffraction. Moreover, composition‐induced phase transitions confirmed following sequence: for ≤ 0.2, single‐phase orthorhombic ixiolite (ZnTiNb ) formed, whereas 0.3 <0.8, rutile coexisted. When ≥ 0.8,...
The effects of complex-ion (Zn 1/3 Nb 2/3 ) 4+ substitutions on the crystal structure, microstructure and microwave dielectric properties Ca(Zr 0.95 Ti 0.05 )O 3 were shown.
Abstract Low dielectric constant (ɛ r ), high quality‐factor ( Q × f) , and temperature stable microwave ceramics with ultra‐low sintering are the preferred choice of researchers for development low‐cost high‐performance resonator antenna (DRA), which have wide application prospects wireless communication technology. In this work, wideband DRAs fabricated using temperature, low‐loss, high‐quality Li 6 B 4 O 9 reported. ceramic synthesized via solid‐state reaction at 620 °C demonstrates...
Abstract Ever‐growing wireless communication industry demands low loss dielectric ceramics with exceptional microwave properties and ultra‐low sintering temperatures. In this work, a solid solution (1 − x )Na 0.5 Bi MoO 4 – SrMoO referred as )NBM– SM ( = 0.4–0.9) was prepared through replacing (NaBi) 2+ by Sr . X‐ray diffraction analysis (XRD) revealed characterized tetragonal scheelite structure. Scanning electron microscopy (SEM) relative density further confirmed the formation of porosity...
A graph $G$ is said to be determined by its generalized spectrum (DGS for short) if any $H$, $H$ and are cospectral with complements implies that isomorphic $G$. Wang Xu (2006) gave some methods determining whether a family of graphs DGS. In this paper, we shall review the old results present new ones along line research.More precisely, let $A$ adjacency matrix $G$, $W=[e,Ae,\cdots,A^{n-1}e]$ ($e$ all-one vector) walk-matrix. Denote $\mathcal{G}_n$ set all on $n$ vertices $\det(W)\neq 0$. We...
Mobile technologies are widely used in education, both as standalone tools and conjunction with other applications. The WeChat-based app Rain Classroom is one such application. includes learning activities not only during class but also before after class. Previous research has suggested strong demand for apps that can facilitate learning. However, relevant studies have empirically evaluated the effect of on English performance. This study examined effects using A total 152 students were...
Multi–hop wireless networks have no fixed physical backbone infrastructure, so Connected Dominating Set (CDS) is frequently selected as virtual to improve network efficiency. Interference a big problem which prevents from reaching efficiency; however, previous works construct CDS without consideration of interference. In this paper, we consider the how Minimum (MICDS) in multi–channel multi–radio multi–hop networks. Multi–channel communication helps reduce interference and performance. A...
The next generation wireless networks (NGWNs) of a base station (BS) with ultra-high dense user equipment's deployment are studied. To extend the coverage area and increase spectrum efficiency energy networks, we propose downlink full duplex cooperative non-orthogonal multiple access (NOMA) simultaneous information power transmission (SWIPT) communication (FCNS) mode in millimeter wave (mmWave) network. All users divided into edge group near relay according to mmWave channel state...
ABSTRACT Low‐ε r (the low dielectric constant) microwave ceramics play an important role in sub‐6 GHz band communication by virtue of their small signal delay. In this paper, Ba 2 CoSi O 7 were synthesized the solid‐phase reaction method, and X‐ray diffraction (XRD) confirms that they belong to a new melilite structure, with C 2/ c (No.15) space group, have good properties ε ∼ 7.37, Q × f ( = 1/dielectric loss, resonant frequency) 26,320 TCF temperature coefficient −55 ppm/°C after being...
The employment of ultra-low permittivity materials in the configuration antennas has been demonstrated to augment antenna bandwidth and diminish signal delay effectively. This study presents three metaphosphate microwave dielectric ceramics (MWDCs). ALaP4O12 (A = Li, Na, K) ceramics, which all belong monoclinic crystal system, exhibit extremely low (εr ≈ 5) excellent quality factor (Q·f > 10,000 GHz) at a sintering temperature (T < 950 °C). Terahertz time-domain spectroscopy indicates that...