Abstract: The present disclosure is applicable to a field of laser radar technology and provides a resonance module, a silicon-based external cavity chip, a laser, and a laser radar. The resonance module includes multiple main resonators and at least one auxiliary resonator, both of the main resonators and the auxiliary resonator are tunable micro-ring resonators; the multiple main resonators are cascaded in sequence through a connecting module to form a cascaded structure, and a vernier effect can be formed between two adjacent main resonators; when an auxiliary resonator is provided for matching the main resonator, coupling of the main resonator and the auxiliary resonator that are provided in a matching manner expands a free spectrum range of the main resonator. The tunable range of lasers applied to the laser radar and improve the scanning angle of the laser radar can be expanded.

Abstract: The present invention discloses a microbially induced carbonate precipitation (MICP)-based vertical barrier, and a preparation method thereof, wherein a raw material of the vertical barrier includes in-situ soil, Ca-bentonite, a bacteria-containing culture medium, and a cementing solution. The bacteria-containing culture medium comprises flocculent ureolytic bacteria flora. The proportions of dry the Ca-bentonite to in-situ soil, the bacterial-containing culture medium to the cementing solution, and the cementing solution to the Ca-bentonite are specified to be 1:2, (2˜5):1, and (1˜2.5):10, respectively, to ensure optimal performance. The present invention addresses challenges related to the insufficient impermeability of Ca-bentonite-based barriers in the application of vertical barrier, and aims to reduce both the cost and carbon emissions associated with their construction.

Abstract: A Fourier ptychography system includes a polarization-sensitive camera positioned for capturing a sequence of polarized images of a sample, an objective lens positioned in a light path between the polarization-sensitive camera and the sample, an array of light sources for directing light to the sample and a generator polarizer positioned between the array of light sources and the sample to polarize light directed to the sample from the array of light sources. A method of creating a tomographic Fourier ptychography image includes receiving, from a polarization-sensitive camera, a sequence of polarized images of a sample, stitching each image of the sequence of images together using a non-linear Fourier transform function to create a composite image, and outputting the composite image as the tomographic Fourier ptychography image. Each polarized image of the sequence of polarized images overlaps another polarized image of the sequence of polarized images.

Abstract: A diffuse optical tomography (DOT) system for generating a functional image of a lesion region of a subject is described. The DOT system includes a source subsystem configured to generate optical waves, a probe coupled to the source subsystem and configured to emit the optical waves generated by the source subsystem toward the lesion region and to detect optical waves reflected by the lesion region, a detection subsystem configured to convert the optical waves detected by the probe to digital signals, and a computing device including a processor and a memory. The memory includes instructions that program the processor to receive the digital signals sent from the detection subsystem and perform reconstruction using a depth-regularized reconstruction algorithm combined with a semi-automated interactive convolutional neural network (CNN) for depth-dependent reconstruction of absorption distribution.

Abstract: Cathode materials comprising composites of vanadium sulfide and sulfur are provided along with methods of making same. Solid-state lithium sulfur batteries comprising such cathode materials are also provided.

Abstract: A microscopy system includes a lens, an image sensor, a planar array of light sources, and a first and second polarizing filter. The lens is disposed between the array and the image sensor. The image sensor has a field of view and is positioned to capture an image of a sample in a target area. Each light source provides light from a different direction to the target area. The first polarizing filter and the second polarizing filter are each positioned at a rotation angle. A method of microscopy imaging includes illuminating a sample positioned in a target area of a lens with a light source from an array of light sources, acquiring a set of images by an image sensor of the illuminated sample, and performing a reconstruction algorithm on the set of images to generate a composite high-resolution image over the field of view of the image sensor.

Abstract: A diffuse optical tomography (DOT) system for generating a functional image of a lesion region of a subject is described. The DOT system includes a source subsystem configured to generate optical waves, a probe coupled to the source subsystem and configured to emit the optical waves generated by the source subsystem toward the lesion region and to detect optical waves reflected by the lesion region, a detection subsystem configured to convert the optical waves detected by the probe to digital signals, and a computing device including a processor and a memory. The memory includes instructions that program the processor to receive the digital signals sent from the detection subsystem and perform reconstruction using a depth-regularized reconstruction algorithm combined with a semi-automated interactive convolutional neural network (CNN) for depth-dependent reconstruction of absorption distribution.

Abstract: A diffuse optical tomography (DOT) system for generating a functional image of a lesion region of a subject includes a source subsystem configured to generate optical waves, a probe coupled to the source subsystem and configured to emit the optical waves generated by the source subsystem toward the lesion region and to detect optical waves reflected by the lesion region, a detection subsystem configured to convert the optical waves detected by the probe to digital signals, and a computing device including a processor and a memory. The memory includes instructions that program the processor to receive the digital signals sent from the detection subsystem, calculate an initial estimate of the functional image by solving an inverse optimization problem with a shape-regularized Fast Iterative Shrinkage-Thresholding algorithm (FISTA), reconstruct the functional image iteratively using a Finite Difference Method (FDM) or a Finite Element Method (FEM), and display the functional image.

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: There are provided a method, apparatus, system and computer readable storage medium of adding an instant message contact. The method includes: receiving a joining-in request for a group from a client where a user locates, the joining-in request comprising a group identifier; acquiring audio and/or video information of other user in the group, based on the group identifier; and transmitting the audio and/or video information of the other user to the client where the user locates, for adding by the client where the user locates the instant message contact based on the audio and/or video information of the other user. Thereby, the mutual trust between unknown users is improved, and the success ratio of adding an unknown user as a contact and the ratio of turning into a contact from an unknown user are increased.

Abstract: A method and device are described for implementing instant communication. Information indicating that a first user is logged into an instant communication interface is obtained. On-line users are displayed to the first user in response to the login of the first user. A first user selects an object to follow from the on-line users and, information about the selected object to follow is received in response to the first user selecting the object to follow from the on-line users. The first user may be set into a first instant communication room in which the selected object to follow resides, for performing instant communication. The device includes: an obtaining module, a displaying module and a processing module. In this manner communication between strangers is facilitated and the efficiency of making friends is enhanced.

Abstract: There are provided a method, apparatus, system and computer readable storage medium of adding an instant message contact. The method includes: receiving a joining-in request for a group from a client where a user locates, the joining-in request comprising a group identifier; acquiring audio and/or video information of other user in the group, based on the group identifier; and transmitting the audio and/or video information of the other user to the client where the user locates, for adding by the client where the user locates the instant message contact based on the audio and/or video information of the other user. Thereby, the mutual trust between unknown users is improved, and the success ratio of adding an unknown user as a contact and the ratio of turning into a contact from an unknown user are increased.