Miracle-dz/UniFAR-FTUs huggingface dataset:
3-(2-Hydro­xy­phenyl)-4-phenyl-1H-1,2,4-triazole-5(4H)-thione

The title mol­ecule, C14H11N3OS, is non-planar. The phenyl and hydroxy­phenyl rings form dihedral angles of 69.08 (9) and 24.57 (9)°, respectively, with the five-membered 2,4-di­hydro-1,2,4-triazole ring. The mol­ecules form centrosymmetric dimers through N—H⋯S hydrogen bonds, with an N⋯S distance of 3.279 (2) A. In addition, the mol­ecule contains one O—H⋯N and one C—H⋯π(phenyl) intramolecular interactions. The dimers are connected through weak intermolecular C—H⋯π(hydroxy­phenyl) interactions into chains in the a direction.
(E)-1,3-Di(2-fur­yl)-2-propen-1-one

The structure of the title compound, C11H8O3, contains two crystallographically independent mol­ecules in the asymmetric unit, both of them located in general positions. Both mol­ecules are non-planar; the dihedral angles between the fur­yl rings are 10.43 (6) and 11.59 (7)°. The crystal structure is stabilized by weak intra- and inter­molecular C—H⋯O and C—H⋯π inter­actions.
Investigation on the Characteristic Components of Dahuang Zhechong Pill Based on High-Performance Liquid Chromatography (HPLC) Fingerprint

Dahuang Zhechong Pill (DHZCP) has been widely used in the treatment of hepatocarcinoma in China. The aim of our study was to identify the characteristic components of DHZCP. First, HPLC fingerprint of DHZCP was established to analyze the common components of 14 batches of DHZCP samples, which were purchased from different manufacturers. The results of HPLC fingerprint detected 164 peaks in these 14 batches of DHZCP. Through similarity analysis, cluster analysis, and principal component analysis, we identified 20 common components upon which to conduct quantitative analysis conducted by an HPLC method. After that, a cytotoxicity test was carried out to screen the active components in DHZCP. The results showed that hypoxanthine, rhein, emodin, aloe emodin, and wogonin are the active components of DHZCP for the treatment of hepatocarcinoma, as they have significant inhibitory effect against the activity of drug-resistant hepatocarcinoma cells (SMMC-7721/DOX) than others.
Outcomes of the Active in My Home (AiMH) intervention for people with psychiatric disabilities in supported housing: A longitudinal pilot and feasibility study

Introduction Facilitating occupational engagement in residents with psychiatric disabilities living in supported housing is important, because meaningful occupation is closely related to wellbeing. The aim was to explore whether residents taking part in the intervention Active in My Home (AiMH) made any changes in activity and recovery from baseline to completed AiMH; whether satisfaction with AiMH was related to any changes; and if changes between baseline and completed AiMH were stable at follow-up. Method AiMH consists of eight sessions for residents and includes workshops for staff. This no-control study involved seven supported housing units and 29 residents who took part in data collection at the start and completion of AiMH and at follow-up after 6–9 months. Outcomes concerned occupational engagement, the unit’s provision of meaningful activity, personal recovery, psychosocial functioning and symptom severity. Findings Improvements occurred in the AiMH participants’ occupational engagement (Z = −2.63, p = 0.008) and personal recovery (Z = −1.98, p = 0.048) from start to completion of AiMH. The improvement on occupational engagement was stable at follow-up (Z = −3.01, p = 0.005), when also psychosocial functioning (Z = −2.39, p = 0.017) and psychiatric symptoms (Z = −2.42, p = 0.016) had improved. Conclusion This study could not show whether the improvements were due to AiMH or other factors. The findings are still promising, however, and encourage further development and testing of AiMH.
Space debris positioning technology based on observation by multiple optical platforms

In this paper, a multi-optical platform target recognition theory based on geocentric observation is proposed by studying the space debris observation model based on multiple optical platforms, and the recognition rate is over 85%. The Gaussian minimum mean square error differential correction algorithm is used to realize the target location by multiple optical observations, and the positioning accuracy reaches 14m, and the positioning accuracy tends to the accuracy of the satellite itself. It can get rid of the disadvantage that the space debris cannot be located by single optical platform, and retain its important advantages such as high accuracy and low power consumption. which lays a solid foundation for the later debris orbit determination.
Research on particle swarm optimization algorithm for space optical-fiber coupling auto-alignment platform

Space light-fiber coupling technology converts spatially transmitted beams into fiber-optic transmissions, facilitating free-space optical communication, and fiber laser radar systems for signal processing in optical fibers. However, it is very difficult to accomplish precise alignment between the spatial beams and the fiber with micron level. In this paper, particle swarm optimization is applied to achieve two-dimensional auto-alignment between the spatial beams and the fiber. The theory proves that when the dimension takes 2, the number of groups is 10, the inertia weight is 0.4~0.8 and the number of iteration does not exceed 100, the particle swarm optimization can converge to the maximum coupling power, and the greater the weight of the inertia, the slower the convergence speed, the larger the search area. If the inertia weight decreases linearly with the number of iterations, the spatial light-fiber coupling auto-alignment function can be quickly completed while searching the alignment space in a wide range.
Manipulate and detect the rotation speed of particles simultaneously using perfect vortex

Optical vortex is a kind of unique structure light with a helical phase distribution and contains orbital angular momentum. It has been found a myriad of important applications of optical vortex, such as micromanipulation, remote sensing and communication. In recent years, there are many researches on the particle manipulation based on the orbital angular momentum of optical vortex. Especially, there is a new kind of optical vortex which is so-called “perfect” vortex whose ring radius is independent of its topological charge has an outstanding performance on the micromanipulation. However, the exist experiments can only realize manipulation of particle and the rotation speed is difficult to obtain. In this paper, we proposed a new scheme which can manipulate the particle and simultaneously detect its rotation speed. We employ the superposition perfect vortex as the probe beam. It is worth to note that the topological charge of the perfect vortex we used has an opposite sign and different magnitude. Therefore, the probe beam possesses remaining orbital angular momentum and can generate the rotational Doppler effect. The rotational Doppler effect is the basics of rotation speed detection. A corresponding experiment has been conducted to verify our method. The results have confirmed the existence of orbital angular momentum of superposition optical vortex with different topological charge. Our scheme can realize manipulation and detection the rotation speed of the particle simultaneously. It is an important supplement on the micromanipulation and maybe useful in the optical gyroscope technique.
Design of portable resonant photoacoustic cell based on ray-tracing software TracePro

In the photoacoustic spectroscopy detection system, photoacoustic (PA) cell is the most important component of the system. The conventional structure of photoacoustic cell is H-shape and this type of photoacoustic cell is complicate to design. The portable resonant photoacoustic cell structure is proposed in this paper. The buffer chamber is integrated with the resonator and the structure is more simple. The portable photoacoustic cell is a tubular structure with concave mirror at both ends and a small convex mirror on the side away from the incident window. Laser can enter the resonator directly without buffer chamber and reflect more in resonator. By simulation made by TracePro software, the luminous flux of longitudinal and cross section is analysed. The simulation results shows that the sensitivity of this photoacoustic cell has increased by 69.7%.
Profile management of astigmatic energy-carrying collimated beam

The approximating dependencies for the spatial characteristics of the intensity distribution of the wave beam in the registration plane are proposed. Was formulated algorithms for control the rotation of a profile without changing its structure, allowable tensile and compression deformities along selected directions. A three component multiplicative form for the ABCD matrix of the optical system-converter of the wave beam profile is discussed.
Polarimetric underwater image recovery based on circularly polarized illumination and histogram stretching

Due to the backscattered light and signal attenuation, the underwater imaging could be severely degraded by the scattering media, especially in the case of strong scattering for dense turbid medium. Considering the circular polarization light can persist better its polarization property during propagating through turbid media compared with the linear polarization light. In this paper, we two polarimetric recovery methods based on the circularly polarized illumination. The first one is based on the combination of both linearly and circularly polarization information. The second one is an improved method for recovering the underwater image by combining histogram analysis. The real-world experiments shown that, by using circularly polarized illumination, the traditional polarimetric dehazing method is optimized which is suitable for use in the strong scattering environment, especially when the method is combined with histogram stretching.
Study on shortwave infrared multispectral horizontal imgaing performance under haze weather condition

Haze weather has always degraded the visibility and clarity of the distanced targets of image sensing. Short wave infrared (SWIR) spectral region has been a good candidate to extend the imaging distant in hazy days. In this paper, we present a horizontal imaging model of SWIR multispectral imaging in hazy weather and the corresponding dehazing method. We performed SWIR multispectral imaging experiments under the different haze conditions. The optical aerosol properties are retrieved from the pm 2.5 concentration and AERNET data using Mie Theory. Finally, the aerosol optical properties is applied in the dehazing method to improve contrast of the obscured multispectral SWIR images.
Lipid Lowering Potential of Carbohydrates from Marine Algae

Lipid Lowering Potential of Carbohydrates from Marine Algae The current study was designed to evaluate the lipid lowering potential of total extract as well as several fractions from Pseudobryopsis mucronata syn. Trychosolen-mucronatus (Boerg) Taylor belongs to Natural Order Bryopsiales. This alga has been selected for lipid lowering activity because it showed lipid lowering effect in our random screening programme of marine flora.
Research on laser one-dimensional range profile denoising and deconvolution

The laser one-dimensional range profile of a target can be approximated as the convolution of the transmitted laser pulse and the range-resolved laser radar cross section. Therefore, the widening effect caused by the laser pulse is eliminated as much as possible by echo deconvolution, and the resolution of the target laser one-dimensional range profile detection can be improved to some extent. To this end, the Richardson-lucy image iterative deconvolution algorithm is introduced into the laser echo deconvolution. Although the algorithm can eliminate the influence of Poisson noise effectively，In order to further improve the deconvolution effect, wavelet noise reduction is first performed to improve the signal-to-noise ratio of the measured data before using the algorithm. The effectiveness of the proposed algorithm is verified by simulation experiments.
Performance analysis of DDR SDRAM in high speed image data acquisition

High-resolution original video image acquisition has higher and higher requirements for data caching. How to perform real-time, high-speed, complete and effective caching of large-capacity data has become the focus of high-speed image data collection. This article will introduce the FPGA, which is produced by Xilinx, as the main control unit for data storage and processing, supplemented by an experimental platform built by other peripheral circuits. On this experimental platform, the performance of DDR SDRAM in high-speed image data acquisition is studied. Firstly, it introduces the block diagram of the high-speed image data transmission system, the principle of data acquisition subsystem and DDR SDRAM, and the basic principle of high-speed image data read and write control. In addition, the DDR SDRAM read and write data stream speed and bus occupancy rate are simulated and tested during high-speed image data acquisition. Finally, through a lot of experiments, the bandwidth utilization rate of the DDR SDRAM is up to 41.5% when the clock frequency of the DDR SDRAM is 200MHz, which improves the operating speed of the image data acquisition system and reduces the power consumption of the system.
Gas plume detection in infrared image using mask R-CNN with attention mechanism

The detection of chemical plumes is a challenging task in the field of infrared image detection due to the diffusivity of gas plumes. As a general-purpose segmentation architecture, Mask R-CNN can output high-quality instance segmentation masks while efficiently detecting gases. However, Mask R-CNN cannot achieve accurate segmentation of deformable targets. Therefore, in this paper, an infrared image gas plume detection method based on the attention mechanism Mask R-CNN is proposed, which can effectively detect the gas plume in the image and segment the infrared image. First, the preprocessed image is imported into Feature Pyramid Networks (FPN) to obtain the corresponding feature map. Second, the feature map is sent to the regional offer network (RPN) to obtain candidate RoIs. Then, a ROI Align operation is performed on the candidate ROI. Finally, these ROIs are classified, Bounding-box regression, and Mask generation. And we attach the edge attention mechanism to the mask branch of Mask R-CNN to improve the detection accuracy. The experimental results show that the method is validated on the real infrared gas images, and competitive results with the prior art methods.
Resolution analysis of focused plenoptic camera with four types focal lengths

The plenoptic camera is a new camera structure which can record the intensity, color and the direction of the light by adding a microlens array in front of the image sensor. Based on some basic concepts of the focused plenoptic camera, we first analyze the imaging characteristics. Then, the design method was given. Furthermore, we establish the depth resolution model after detailed derivation. The imaging characteristics of the focused plenoptic camera with a novel structure of four types focal lengths microlens array was analyzed. The simulation results show that our designed camera has the advantages of large depth of field and high depth resolution. The method proposed in this paper can provide reference for designing plenoptic cameras for specific application scenarios.
Dynamic holography method for the diagnostics of nanosuspensions

The electrostrictive mechanism of optical nonlinearity in the artificial Kerr-like medium is analyzed. The recording of the dynamic hologram is significantly non-linear process at high intensities of radiation. The model of the nonideal gas of nanoparticles includes the second virial coefficient only and allows the exact solution of the nonlinear equation. The amplitude of phase grating depends exponentially versus intensity but it saturates at the high filling factor due to the repulsion effect.
A new composition in-situ analyzing instrument of planetary rocks and soils

It might preserve vital clues about the imprints of life and the past livability of the planet, which are important information for studying the origin and the history of the planet, of planetary rocks or soils, so the measurement of planetary rock or soil composition is a basis of planetary exploration. Most of current composition analysis of rocks or soils, based on alpha particle backscattering technique and spectrum measurement of laser excitation, has disadvantages of low measurement accuracy, large resource demand and long measurement time. So it is urgent to seek different methods to measure the rocks or soils of planetary. A few of merits are included in x-ray active excitation mode: firstly, it has good resolution ability for elements above medium quality; secondly, the detection sensitivity of elements can reduce to 10ppm. As long as anode targets are changed, the detection sensitivity of any element can be matched. JPL is developing a prototype of a new rock composition analysis instrument based on x-ray source in order to satisfy the needs of NASA Mars 2020 exploration. It is irreplaceable as the next generation of planetary rocks or soils composition analysis instrument of x-ray active excitation mode. Therefore, the core content of this paper is to develop a composition analysis instrument, which integrates miniature x-ray source with the silicon drift detector (SDD). As the key technology of x-ray active excitation mode, miniature x-ray source must meet the needs of low power consumption, self-sealing, high intensity and micro-focus spot. For this purpose, a design proposal of the miniature x-ray source is proposed and its theoretical model is established. The size of cathode structure greatly impacts on the size of the whole miniature x-ray tube on account of the simplicity structure of x-ray tubes. So compared with the traditional x-ray source, a new cathode structure is used for the sake of reducing the whole size of the miniature x-ray tube. Not only that, but the size of cathode structure has influence on the structure of filaments, the magnitude of current and the size of focal spot of x-rays. At the same time, mini focal spot is needed to enhance the resolution ratio and intensity of rocks or soils composition analysis instruments. Hence, it is indispensable to optimize the cathode structure in order to realize the miniature size and mini focal spot. A simulation model has been set up based on theoretical calculation and simulated using charged particle optics software COMSOL or SIMION. The shape and the size of x-ray tube’s cathode have been optimized so as to attain the mini focal spot. Additionally, the influence of high voltage loaded on the cathode or the filament to focal spot size has been taken fully into account. Moreover, the SDD detector is also integrated with the miniature x-ray source and the whole volume of the composition analysis instrument decreases which is beneficial to the deep space exploration.
Multi-wavelength diffractive lens design for color imaging

The optical properties of conventional optical components vary with wavelength. This leads to chromatic aberrations of optical components, and affects the accuracy and effectiveness of optical systems operating in wideband severely, especially in the visible band. The traditional optical design achieves achromatic result by bonding a plurality of lenses of different dispersion properties. The diffractive optical element (DOE) is characterized by miniaturization and light weight, which can realize functions such as array, integration, and arbitrary wave-front conversion. However, it is difficult to perform in conventional optical devices. In this paper, we can use diffractive lenses to achieve achromatic effects. A method of designing multi-wavelength achromatic lenses by using genetic algorithms combined with scalar diffraction theory is proposed. We use the focusing performance of different light wavelengths in the focal plane as the optimization condition. After several iterations, we finally get the optimal lens structure, and use this lens to do the simulation focusing experiment based on RGB three-color light. The simulation results show that the achromatic lens can focus the red, green and blue light to a point in space. In addition, the achromatic lens can be on the order of microns in diameter. Therefore, such a lens has a smaller volume, which is difficult to achieve with conventional lenses.
Optical system of design for hyperspectral imaging applied in agriculture

This article is devoted to design hyperspectral imaging optical system, which is actively used to solve practical problems in agriculture, such as detection of damage to crops by adverse meteorological phenomena, detection of damage to crops by pests and diseases, monitoring of germination of grain, detection of the situation to which weeds are distributed, etc. These devices of optical system are installed on unmanned aerial vehicles (UAV). A feature of such system is that the camera can take photographs of one area in different spectral ranges, which recognizes spectral signatures from objects and allows more detailed information in a shorter time. This article describes the searching result and the designing process of an optical system which do above characteristics possibility.
Dynamics of nonlinear electrostrictive response in nanosuspension at high intensities of radiation

The electrostrictive mechanism of optical nonlinearity in the artificial Kerr-like medium is analyzed. The recording of the dynamic hologram is significantly non-linear process at high intensities of radiation. It is shown that the nonlinear differential equation for a nanosuspension can be reduced to a Hamiltonian system of equations. The exact solution can be obtained for the nonlinear problem in disregard of the diffusion. The calculation gives expression for the space and time dependence of the concentration profile of the nanosuspension, which is valid at short times.
Effect of lateral index step on the performance of high-power broad-area 970-nm diode lasers based a large-optical-cavity waveguide structure

High brightness broad area lasers with high polarization purity are highly efficient light sources for high brightness fiber coupled and direct semiconductor lasers. Effect of lateral index step on the performance of high-power broad-area 970-nm diode lasers based a large-optical-cavity waveguide structure was studied and presented here. The index step of the 80-μm wide ridge is found a key parameter to control the output power, lateral far-field angle, beam waist and polarization purity. The threshold current decreases with the increase of the etching depth while the slope efficiency increases. When gain guide lateral waveguide by very shallow etching was used, the beam waist expands to a size of more than 200 μm, which was attributed to anti-guiding effect and current spreading. When large index step is introduced by deep etching, enhanced filamentation was observed, which is attributed to an enhanced confinement of the higher order modes. What’s more, the strain introduced by the etching of the ridge can deteriorate the polarization purity. The study in this paper shows that the lateral index step should be optimized to fabricate high brightness high efficiency broad area lasers with high polarization purity.