A5000421606- Inertial Sensor and Navigation
- Geophysical and Geoelectrical Methods
- Magnetic Field Sensors Techniques
- Geophysics and Gravity Measurements
- Characterization and Applications of Magnetic Nanoparticles
- Physics of Superconductivity and Magnetism
- Traditional and Medicinal Uses of Annonaceae
- Nuclear Physics and Applications
- Chemical Synthesis and Analysis
- Marine Sponges and Natural Products
- Carbohydrate Chemistry and Synthesis
- Robotics and Sensor-Based Localization
- Electromagnetic Scattering and Analysis
- Geomagnetism and Paleomagnetism Studies
- Geophysical Methods and Applications
- Microbial Natural Products and Biosynthesis
Jilin University
2020-2024
Ocean University of China
2023-2024
Five new heronamides (1–5) with two unreported 6/6/6/5/5-pentacyclic and 6/9/6/5-tetracyclic skeletons were isolated from deep-sea-derived Streptomyces .
In order to calibrate the zero offset error and triaxial non-orthogonal of full tensor magnetic gradiometer (FTMG) probe composed superconducting quantum interference device (SQUID) magnetometers, we propose a new calibration method in this article. With help Helmholtz coil, can generate field with known parameters. By establishing objective functions containing parameters for outputs SQUIDs solving them least-squares fitting algorithm, included angle between SQUID sensor coil be obtained,...
The integration of NMR-metabolomic and genomic analyses can provide enhanced identification structural properties as well key biosynthetic information, thus achieving the targeted discovery new natural products. For this purpose, NMR-based metabolomic profiling marine-derived Streptomyces sp. S063 (CGMCC 14582) was performed, by which N-methylated peptides possessing unusual negative 1H NMR chemical shift values were tracked. Meanwhile, genome mining strain revealed presence an unknown NRPS...
In order to overcome the limitations of traditional error calibration method for three-axis superconducting quantum interference device (SQUID) magnetometers, this article presents a fast SQUID magnetometers. proposed method, full-space rotational and frequency-controllable magnetic field with constant total intensity can be generated by triaxial Helmholtz coil. Meanwhile, nonorthogonal error, zero offset proportional coefficient which measure relative value rather than absolute value,...
Considering that diurnal variation interferes with three-component magnetic surveys, which inevitably affects survey accuracy, exploring an interference compensation method of high-precision is particularly desirable. In this paper, a for proposed, the procedure involves calibrating magnetometer error and misalignment between non-magnetic theodolite. Meanwhile, theodolite used to adjust attitude unify observed into geographic coordinate system. Thereafter, feasibility validity proposed were...
In order to calibrate the misalignment error of a triaxial magnetometer and an inertial navigation system in three-component magnetic survey system, improved method with easy realization is proposed this paper. We establish model based on Euler’s theorem. transform calibration into estimating parameters minimize value objective function. Then, nonlinear least squares used estimate parameters. simulation experiment, deviation between preset within 1 nT. field fluctuation x, y, z components...
Abstract The improving quality of ultra-sensitive superconducting quantum interference devices has led to the construction advanced full-tensor magnetic gradiometers (FTMGs) integrated on mobile carriers such as aircraft, vehicles and ships. FTMGs measure smallest spatial gradients, possessing many practical advantages compared conventional scalar surveys three-component surveys. However, field caused by sources associated with carrier significantly decreases precision measurement. In this...
In order to calibrate crosstalk error between superconducting quantum interference device (SQUID) magnetometers in a multichannel SQUID system, we propose an innovative calibration method for of based on the Moore–Penrose inverse and Helmholtz coil this article successfully apply it eight-channel full tensor magnetic gradiometer (FTMG). We first analyze causes through working principle readout circuit build model FTMG. Then, introduce solution 56 coefficients construction matrix needed coil....
In order to calibrate the non-orthogonal error and scale factor of triaxial Helmholtz coil, a comprehensive calibration method is proposed in this paper. The model established first, then generate frequency-controllable spatial rotating magnetic field whose intensity constant based on coil introduced. Based fact that generated by current through constant, objective function constructed parameters are solved using least-squares fitting method. Simulation experiments tests prove effectiveness...