A5114860215- NMR spectroscopy and applications
- Boron and Carbon Nanomaterials Research
- Boron Compounds in Chemistry
- Advanced NMR Techniques and Applications
- Geophysical and Geoelectrical Methods
- Radiopharmaceutical Chemistry and Applications
- Probiotics and Fermented Foods
- Geophysical Methods and Applications
- Rough Sets and Fuzzy Logic
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Microbial Metabolites in Food Biotechnology
- Reproductive Biology and Fertility
- Semantic Web and Ontologies
- Radioactive element chemistry and processing
- Sperm and Testicular Function
- Seismic Imaging and Inversion Techniques
- Gut microbiota and health
- Manufacturing Process and Optimization
Jilin University
2005-2020
Ministry of Education of the People's Republic of China
2017-2019
Jilin Province Science and Technology Department
2005
Magnetic resonance sounding (MRS) is a novel geophysical method to detect groundwater directly. By applying this underground projects in mines and tunnels, warning information can be provided on water bodies that are hidden front prior excavation thus reduce the risk of casualties accidents. However, unlike its application ground surfaces, MRS environments constrained by narrow space, quite weak signal, complex electromagnetic interferences with high intensities mines. Focusing special...
Magnetic resonance sounding (MRS) using the Earth's magnetic field is a noninvasive and on-site geophysical technique providing quantitative characteristics of aquifers in subsurface. When MRS technology applied mine or tunnel for advance detecting source water that may cause disastrous accident, spatial constraints limit size coil sensor thus lower detection capability. In this paper, weak signal designed to noise (SNR) analyzed optimized. The has rigid structure square 1 m deploying narrow...
Various isomers of macropolyhedral borane ions [B20H18]n (n = 0, -2, -4) are investigated by using the density functional theory methods at RB3LYP/6-31+G* and RB3LYP/6-31G* levels to obtain optimized geometries, harmonic vibrational frequencies, electron structures, stability order. The calculated results show that bond lengths consistent with available experimental values natural populations, taking [a2 -B20H18]4- (4) as an example, also in agreement NMR spectra. frequencies all real, so...
Surface and underground nuclear magnetic resonance (UNMR) method has the advantage of direct quantitative detection groundwater been widely used in water resource survey advance sources causing disaster space. However, UNMR signal is extremely weak tunnels or mines. The signal-to-noise ratio (SNR) received data at one single record even less than −20 dB because strong environmental noise. A nearby reference noise cancellation (NRNC) proposed this study to improve SNR. calculates transfer...
The configuration problem in manufacture is more complicated than most other fields. Therefore, the design of modeling and reasoning module for product manager very important complex. It just what mainly discussed this paper. A framework PCM put forward according to expert system theories, a series formalized knowledge representations data-driven graph control strategy are provided. In representations, weight constraint defined distinguish origins parameter value. can be used simplify...