Landslide susceptibility evaluation can accurately predict the spatial distribution of potential landslides, which offers great usefulness for disaster prevention, reduction, and land resource management. Aiming at problems insufficient samples landslide compilation, difficulty in expanding samples, expression nonlinear relationships among factors, this paper proposes a new method combining deep autoencoder multi-scale residual network (DAE-MRCNN). In first step, was used to learn feature...

With complex and diverse ecosystem types complete ecological elements such as mountains, rivers, forests, farmlands, lakes, grasslands, sand, glaciers, the Ruoergai Prairie upstream of Yellow River is an integral part Qinghai-Tibet Ecological barrier a critical area for ensuring security China. In Prairie, climate change human activities have led to grassland degradation, water soil loss, shrinking forest area, which has highlighted need restoration. Therefore, comprehensive evaluation great...

Earthquake-induced landslides have always been a hot research topic in the field of geosciences, however, there few bibliometric analyses on this topic. In order to systematically understand status, study is based bibliometrics and extensively uses visualization analysis techniques. It adopts combination quantitative qualitative methods conduct in-depth 5016 papers collected from Web Science (www.webofscience.com). The results revealed that: (1) number earthquake-induced steadily increasing,...

High-resolution seamless remote sensing (HRSRS) images are essential foundational data for natural resource monitoring and land-use assessment, etc. However, high spatial resolution (HR) Earth observation from satellites typically has a long revisit period, optical can be widely obscured by clouds. Furthermore, the geometry radiation issues make generation of HRSRS challenging task. In this letter, to systematically address these issues, we propose robust efficient framework designed...

Deep, unstable slopes are highly developed in mountainous areas, especially the Minjiang River Basin, Sichuan Province, China. In this study, to reveal their deformation evolution characteristics for stability evaluation and disaster prevention, multi-period optical remote sensing images (2010–2019), SBAS-InSAR data (January 2018–December 2019), on-site real-time monitoring (December 2017–September 2020) were utilized monitor of a large deep-seated toppling, named Tizicao (TZC) Toppling. The...

The Daguangbao (DGB) landslide was the largest that triggered by 2008 Wenchuan earthquake with a magnitude of Ms8.0. sliding surface this constrained on bedding fault 400 m below ground surface. Seismic records show suffered not only from strong horizontal but also vertical shaking almost equal to component. In study, reveal triggering mechanism DGB landslide, study ignores steep dipping tension fracture section and leading edge-locking trailing edge geological model large optical package is...

66 samples from the human oral mucosa tissue, including 43 normal and 23 malignant tissue were measured by confocal Raman microspectroscopy. The low signal-to-background ratio spectra tissues obtained this technique without any sample preparation. A preprocessed algorithm based on wavelet analysis was used to reduce noise eliminate background of spectra. Then principal components (PCA) as a classification method in order identify whether is or not. integrated areas four normalized wavenumber...

LiDAR point clouds are rich in spatial information and can effectively express the size, shape, position, direction of objects; thus, they have advantage high utilization. The cloud focuses on describing shape external surface object itself will not store useless redundant to describe occupation. Therefore, become research focus 3D data models widely used large-scale scene reconstruction, virtual reality, digital elevation model production, other fields. Since various characteristics, such...

Acoustic emission and thermal infrared signals are related to the process of rock breaking. In this paper, acoustic obtained during loading indoor granite freeze-thaw cycle test uni-axial compression test. Then sent out breaking analyzed by short-time Fourier transform get peak frequency. radiation thermographic sensor is applied monitor record temperature change on surface so as influence characteristics materials deformation Under same axial stress, samples passing through more cycles have...

High-quality cirrus removal plays a crucial role in remote sensing data analysis. Cirrus parallaxes are commonly observed within the vicinity of clouds visible and near-infrared (VNIR) bands Landsat 8/9 images. have nonnegligible effect on removal, but existing methods do not account for correction parallaxes. Meanwhile, large-scale image processing involves intensive computation that requires extensive computing time. To address low efficiency, we propose fast robust (FRCR) method. FRCR has...

Rydberg atoms are important building blocks for quantum technologies, exploited to new applications in computing, communication and sensing due their unique tunable properties.Besides the widely-used few-photon resonant excitation specific state, multiple states can be populated coherently effciently through frustrated tunneling ionization or Coulomb potential recapture effect strong laser field. The field provides an opportunity realize ultrafast control on atom bridge physics information...

It is important in the petrochemical industry that there are high sensitivity, accuracy, low-power consumption and intrinsically safe methods for detection of propane, butane their gas mixtures, to provide early warning potential explosion hazards during both storage transportation oil gas. This paper proposes a 'proof principle' method propane using Tunable Diode Laser Absorption Spectroscopy (TDLAS) technique over near-infrared wavelength range from 1678nm 1686nm. relatively inexpensive...

The new numerical model for studying the dynamic evolution of soil–rock mixture landslides is presented in this article. based on generalized interpolation material point method analyzes a simplified slope. gravity linearly loaded, and linear elastic used to update stress obtain initial state A small soil cohesion set trigger slope sliding until equilibrium reached again. During period, elastic–plastic Drucker–Prager criterion adopted stones. differences between homogeneous are studied....

In this paper, the material point method (MPM) is used to explore influence of matrix (namely soil) in soil-rock mixture (SRM) on stability SRM slope. Firstly, a typical slope model established, and series circular stone blocks with different sizes are generated inside slope, then established. Next, gravity linearly loaded. When it completed, kinetic damping applied, energy set 0 obtain initial state Then, under soil cohesions internal friction angles simulated by MPM. The simulation results...

There are two main drawbacks seen in the use of multi-gas detection method based on tuneable diode laser absorption spectroscopy (TDLAS). The first is that multiple lasers have traditionally been employed system, which means not only system cost, but also response time increased. second major issue existence a number kinds cross interference, and thus sensitivity accuracy existing multi-component gas approach has greatly restricted, this become technical bottleneck for practical multi...

66 samples from the human oral mucosa tissue were measured by confocal Raman microspectroscopy. A preprocessed algorithm based on wavelet analysis was used to reduce noise and eliminate background of spectra firstly. Then integrated areas four normalised wavenumber regions 1004, 1156, 1360 1587 1660 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> carried out for discrimination normal malignant samples. Lastly, means combining...

In this paper, 66 samples from the human oral mucosa tissue were measured by confocal Raman microspectroscopy. A preprocessed algorithm based on wavelet analysis was used to reduce noise and eliminate background of spectra firstly. Then integrated areas four normalised wavenumber regions 1004, 1156, 1360 1587 1660 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> carried out for discrimination normal malignant samples. Lastly, means...

A low power consumption, quasi-distributed, multi-point laser methane detection system incorporating a Vertical Cavity Surface Emitting Laser (VCSEL) has been designed and its performance discussed. Being based on the features of absorption spectrum adaptive tracking technology, can realize on-line monitoring across 14 channels sensors, with maximum transmission distance for each sensor being 10km. Working temperature range 0°C-40°C, measurement error was determined to be less than ±0.03%...