Abstract: A pressure compensation device with an accumulator group for controlled pressure drilling includes an electrical flat valve, a check valve, an accumulator group, a flanged pup joint and a support base. The electrical flat valve is connected to the check valve and is mounted on a top surface of the support base. The accumulator group mounted on the whole support base is a pre-storage pressure compensation device for controlled pressure drilling, and is located at a downstream position of the check valve. The liquid inlet end of the accumulator group is connected to the check valve, and the liquid discharge end is connected to the flanged pup joint.

Abstract: The present disclosure discloses a voice conversion method. The method includes: obtaining a to-be-converted voice, and extracting acoustic features of the to-be-converted voice; obtaining a source vector corresponding to the to-be-converted voice from a source vector pool, and selecting a target vector corresponding to the target voice from the target vector pool; obtaining acoustic features of the target voice output by the voice conversion model by using the acoustic features of the to-be-converted voice, the source vector corresponding to the to-be-converted voice, and the target vector corresponding to the target voice as an input of the voice conversion model; and obtaining the target voice by converting the acoustic features of the target voice using a vocoder. In addition, a voice conversion apparatus and a storage medium are also provided.

Abstract: This present disclosure discloses a transformer. The transformer comprises a lithium battery pack, a transformer coil and 2N switches. The lithium battery pack comprises N single batteries connected in series. The transformer coil comprises a magnetic core, N first windings and N second windings. The N first windings combined into one strand, the N second windings combined into one strand, are then wound on the magnetic core respectively. The N first windings and the N second windings have same number of coil turns, same homonymous ends and same common ends. Two ends of each single battery are connected with one first of the first windings and one of the second windings in parallel respectively. Each first winding is connected with one switch in series. Each second winding is connected with one switch in series. N is a natural number greater than or equal to 1.

Abstract: Disclosed are basic copper chloride particulate matter and a preparation method therefor. The basic copper chloride particulate matter is mainly composed of basic copper chloride particles, and the basic copper chloride particles, with a particle size of 60-250 ?m, in the basic copper chloride particulate matter comprise 97% or more of the total mass of the basic copper chloride particulate matter.

Abstract: A white light interferometric fiber-optic gyroscope based on a rhombic optical path difference bias structure includes a laser, a rhombic optical path difference bias structure, a fiber coil and a photodetector. The white light interferometric fiber-optic gyroscope adopts an all-fiber structure to simplify the complexity of a gyroscope system and reduce the overall cost. A white light interferometric demodulation algorithm is used to realize linear output of rotation rate signals.

Abstract: A white light interferometric fiber-optic gyroscope based on a rhombic optical path difference bias structure includes a laser, a rhombic optical path difference bias structure, a fiber coil and a photodetector. The white light interferometric fiber-optic gyroscope adopts an all-fiber structure to simplify the complexity of a gyroscope system and reduce the overall cost. A white light interferometric demodulation algorithm is used to realize linear output of rotation rate signals.

Abstract: A medical image processing method and processing apparatus, and a computer readable storage medium. The method includes: obtaining a to-be-processed image; performing a feature extraction on the to-be-processed image to obtain a corresponding feature image; and re-determining a pixel value of each pixel in the to-be-processed image based on first information and second information of a corresponding pixel in the feature image, and processing the to-be-processed image; wherein the first information is information of a pixel adjacent to the corresponding pixel in the features image, and the second information is information of a pixel that is not adjacent to and is similar to the corresponding pixel in the features image.

Abstract: The present disclosure relates to a nanocrystal that includes a nanocrystal core, a first ligand coordinated to a first portion of a surface of the nanocrystal core, and a second ligand coordinated to a second portion of the surface, where the second ligand includes a first functionalized aromatic molecule.

Abstract: A basic zinc chloride particulate matter and a preparation method therefor. The basic zinc chloride particulate matter mainly consists of basic zinc chloride particles. In the basic zinc chloride particulate matter, D10>100 ?m, and D95>450 ?m. The basic zinc chloride particles do not contain adhesives. The basic zinc chloride particles contained in the basic zinc chloride particulate matter are approximately spherical, and the basic zinc chloride particles with the particle diameter>500 ?m in the basic zinc chloride particulate matter accounts for 1% or less of the total mass of the basic zinc chloride particulate matter.

Abstract: Disclosed are basic copper chloride particulate matter and a preparation method therefor. The basic copper chloride particulate matter is mainly composed of basic copper chloride particles, and the basic copper chloride particles, with a particle size of 60-250 ?m, in the basic copper chloride particulate matter comprise 97% or more of the total mass of the basic copper chloride particulate matter.

Abstract: A basic zinc chloride particulate matter and a preparation method therefor. The basic zinc chloride particulate matter mainly consists of basic zinc chloride particles. In the basic zinc chloride particulate matter, D10>100 ?m, and D95>450 ?m. The basic zinc chloride particles do not contain adhesives. The basic zinc chloride particles contained in the basic zinc chloride particulate matter are approximately spherical, and the basic zinc chloride particles with the particle diameter >500 ?m in the basic zinc chloride particulate matter accounts for 1% or less of the total mass of the basic zinc chloride particulate matter.

Abstract: The ability to upconvert two low energy photons into one high energy photon has potential applications in solar cells, photodetectors and data storage. In this disclosure, CdSe and PbSe semiconductor nanocrystals are combined with molecular emitters (diphenylanthracene and rubrene) to upconvert photons in both the visible and near infrared spectral regions. Absorption of low energy photons by the nanocrystals is followed by energy transfer to the molecular triplet states, which then undergo triplet-triplet annihilation to create high energy singlet states that emit upconverted light. By using conjugated organic ligands on the nanocrystals to form an energy cascade, the upconversion process can be enhanced by up to three orders of magnitude. The use of different combinations of nanocrystals and emitters shows that this platform has great flexibility in the choice of both excitation and emission wavelengths.

Abstract: Provided herein are transmitter ligands that improve photon upconversion of near infrared light (NIR) to visible light. The presently provided ligands are complexed to semiconductor nanocrystals and improve triplet energy transfer from semiconductor nanocrystal to annihilator in triplet-triplet annihilation. Suitable applications include bio-imaging.

Abstract: Provided herein are transmitter ligands that improve photon upconversion of near infrared light (NIR) to visible light. The presently provided ligands are complexed to semiconductor nanocrystals and improve triplet energy transfer from semiconductor nanocrystal to annihilator in triplet-triplet annihilation. Suitable applications include bio-imaging.

Abstract: Disclosed is a modified zeolite catalyst for the liquid phase alkylation and transalkylation of benzene comprising 30 to 70% by weight of H-beta zeolite with a silicon to aluminium ratio of 20 to 40; 0.5 to 10% by weight of halogen; and .gamma.-Al.sub.2 O.sub.3 of the balance. Also disclosed a method for preparing the said catalyst comprising adding a halogen-containing compound to a mixture of H-beta zeolite and a precursor of .gamma.-Al.sub.2 O.sub.3, forming followed by calcining.