A5100370060- Titanium Alloys Microstructure and Properties
- Cyclopropane Reaction Mechanisms
- Advanced Wireless Communication Technologies
- Metal and Thin Film Mechanics
- Microstructure and mechanical properties
- Synthesis and Catalytic Reactions
- Hydrocarbon exploration and reservoir analysis
- Advanced MIMO Systems Optimization
- Catalytic C–H Functionalization Methods
- Hydrogen embrittlement and corrosion behaviors in metals
- Intermetallics and Advanced Alloy Properties
- Metallurgy and Material Forming
- Optical Wireless Communication Technologies
- Satellite Communication Systems
- Geological and Geophysical Studies
- Drilling and Well Engineering
- Welding Techniques and Residual Stresses
- Aluminum Alloy Microstructure Properties
- Advanced Welding Techniques Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Analytical chemistry methods development
- Oil and Gas Production Techniques
- Semiconductor materials and devices
- Methane Hydrates and Related Phenomena
- Magnesium Alloys: Properties and Applications
Chinese Academy of Sciences
2005-2023
Dalian University of Technology
2023
Suzhou University of Science and Technology
2021
University of Science and Technology of China
2014-2021
Shenzhen Institutes of Advanced Technology
2021
Research Institute of Petroleum Exploration and Development
2015-2020
The University of Texas at Austin
2018
University of Michigan
2018
Imperial College London
2018
Oakland University
2018
Existing work regarding the performance comparison between nonorthogonal multiple access (NOMA) and orthogonal (OMA) can be generally divided into two categories. The in first category aims to develop analytical results for comparison, often with fixed system parameters. second propose efficient algorithms optimizing these parameters, compares NOMA OMA by computer simulations. However, when parameters are optimized, theoretical superiority of over is still not clear. Therefore, this paper,...
In this paper, the design of non-orthogonal multiple access (NOMA) in a multiple-input-single-output (MISO) downlink scenario is investigated. The impact recently developed concept, quasi-degradation, on NOMA transmission first studied. Then, Hybrid (H-NOMA) precoding algorithm, based proposed. By exploiting properties H-NOMA precoding, low-complexity sequential user pairing algorithm consequently developed, to further improve overall system performance. Both analytical and numerical results...
In this letter, based on the non-orthogonal multiple access (NOMA) concept, a quality-of-service optimization problem for two-user multiple-input-single-output broadcast systems is considered, given pair of target interference levels. The minimal power and optimal precoding vectors are obtained by considering its Lagrange dual via Newton's iterative algorithm, respectively. Moreover, closed-form expressions transmission some special cases also derived. One these termed quasi-degraded, which...
In this paper, downlink beamforming (BF) for hybrid non-orthogonal multiple access (NOMA) systems is considered, in order to combat inter and intra cluster interference. First, minimize the inter- intra-cluster interference, projection NOMA (PH-NOMA) BF algorithm introduced, by combining conventional zero-forcing (ZFBF) (H-NOMA) precoding. Second, further reduce overall two user pairing algorithms, termed projection-based (PBPA) inversion-based (IBPA), are also proposed, adopting properties...
The Rh(II)-catalyzed three-component reaction of aryl diazoacetates, alcohols and aldehydes was explored, which provided evidence alcoholic oxonium ylide formation for O−H insertion. A new C−C bond where ylides were trapped by electron-deficient (or imines) realized.
A practical highly diastereoselective synthesis of 1,2-diamines through carbon−carbon bond formation involving an ammonium ylide intermediate is reported for the first time. By treating methyl phenyldiazoacetate with arylamine and imine in presence dirhodium acetate, erythro diastereomer 1,2-diaryl-1,2-diaminopropanoate formed stereochemical preferences greater than 10:1.
The Upper Paleozoic strata of the Tarim Basin have abundant resources marine oil and gas. In Tahe area, Halahatang Tazhong area basin, many large-scale oilfields been found. These a confirmed gas reserves worth more than 2.5 billion tons completed annual output 14 million equivalent. belief that only main hydrocarbon source rocks are Cambrian or Ordovician is still controversial. Chemists made significant progress effectively lead exploration in Basin. Due to complexity basin limitation...
The microstructure/texture evolution (MTE, for short) map and processing of a new near α titanium alloy Ti65 were constructed in order to investigate the workability microstructure hot deformation. illustrated four domains, two summit domains instability domains. morphologies phase changed from spheroidization (α+β region) deformed elongated β grains (near transus temperature Tβ), then obvious dynamic recrystallization (DRX) (β with rising 930 °C 1140 °C. Deformation α+β field mainly...
To cope with the urgent demands of aerospace industry for lightweight and excellent high-temperature performance titanium alloy components, microstructure evolution, silicide precipitation mechanical behaviour a novel Ti65 ultrathin sheet different heat treatments were systematically investigated. Submicron (Ti,Zr)6Si3 silicides are observed after solution followed by air cooling, leading to decline significant fluctuations in tensile properties. For furnace cooling samples, (Ti,Zr)5Si3...
Rhodium(II) acetate catalyzed 1,3-dipolar cycloaddition of methyl phenyldiazoacetate with a mixture electron-rich and electron-deficient aryl aldehydes gave 1,3-dioxolanes in high yield excellent chemoselectivity.
Ammonium ylides generated in situ from α-diazo esters and amines the presence of catalytic Rh2(OAc)4, undergo an aldol-type reaction with aldehydes affording highly substituted amino acid frameworks a convergent, three-component reaction.
In this paper, the design of minimum Euclidean distance (MED) precoders is developed for multiple-input multiple-output nonorthogonal multiple access (MIMO-NOMA) downlink. First, we propose MED precoding algorithm two-user 2 × MIMO-NOMA downlink by combining methodology previously unicast MIMO and multicast scenarios. Then, to extend general multiuser scenarios, two algorithms user pairing, based on condition number orthogonality defect, respectively. Finally, computer simulations validate...
The rhodium(II)-catalyzed three-component reaction of diazoacetates, titanium alkoxides and aldehydes is shown to give α-alkoxyl-β-hydroxyl acid derivatives; the novel C–C bond formation proposed occur through oxonium ylides derived from diazo compounds alkoxides, followed by intermolecular trapping aldehydes.