Abstract: Exemplary methods of manufacturing a semiconductor cover wafer may include sintering aluminum nitride particles into a substrate characterized by a thickness and characterized by a disc shape. The methods may include grinding a surface of the substrate to reduce the thickness to less than or about 2 mm. The methods may include polishing the surface of the substrate to reduce a roughness. The methods may include annealing the substrate at a temperature of greater than or about 800° C. for a time period of greater than or about 60 minutes.

Abstract: Embodiments of this application provide an antenna and an antenna system. As the antenna is functionally equivalent to a plurality of conventional antennas, device costs and base station space occupied by the antenna can be reduced. The antenna includes a first reflective surface and N feeds, where N is an integer greater than 1. The N feeds are disposed on the first reflective surface, the first reflective surface includes N areas, the N areas are in one-to-one correspondence with the N feeds, and each area is used to reflect a beam radiated by a corresponding feed.

Abstract: This application discloses example beam direction adjustment methods, apparatuses, and media. One example method includes obtaining at least one of an azimuth or a pitch angle of a microwave antenna in an antenna system, where the antenna system includes the microwave antenna and a radome installed at an air interface of the microwave antenna, the radome includes a liquid crystal array including M×N liquid crystal cells, and both M and N are integers greater than 0. A target scanning angle of the microwave antenna is determined based on at least one of the azimuth or the pitch angle. A first bias voltage value of the liquid crystal array is determined based on the target scanning angle. A voltage of the liquid crystal array is set to the first bias voltage value.

Abstract: Provided are a marker gene for identifying and classifying dopaminergic precursor cells (DPC), a screening method therefor and use thereof. The marker gene is a combination of 12 genes having specific up-regulation expression in the DPC cells relative to the neural stem cells (NSCs). The screening of the marker gene is based on a high-throughput RNA sequencing technology. In the samples of the NSC cells and the DPC cells, genes of which the specific expression is significantly up-regulated in the DPC cells are detected, and by bioinformatic analysis, a group of candidate genes capable of regulating the differentiation process of neural stem cells to dopaminergic neurons are identified. The marker gene combinations provided can be used to identify and classify DPC cell products for clinical treatment and to control the quality of the DPC cell products for clinical application.

Abstract: Use of a TGF-? small molecule inhibitor in the field of nerve regeneration, for in vitro regeneration and directed differentiation of a variety of nerve cells and brain-like organs. By adding the TGF-? small molecule inhibitor to a set of basal media having clear chemical compositions, pluripotent stem cells can be induced into adult cells derived from a variety of neural stem cells, and the number of induced nerve cells can be greatly increased.

Abstract: Provided is a pure chemical induction method for photoreceptor neuron cells. A group of small molecule inhibitors are added into a serum-free basic culture medium, and pluripotent stem cells are quickly converted into photoreceptor neuron cells. In the present invention, serum is not used, and chemical small molecules are used to replace retinol, eliminating the adverse factors of serum while ensuring the operation of visual circulation required by the development of photoreceptor neurons.

Abstract: A method includes: A first device sends a first signal to a second device, where the first signal includes a first transmit signal and a first pilot signal; the first device obtains a second signal, where the second signal includes a first self-interference signal, a second pilot signal, and a second receive signal from the second device; the first device extracts jitter information of the first self-interference signal based on the first pilot signal and the second pilot signal; the first device reconstructs a self-interference signal based on the first transmit signal and the jitter information of the first self-interference signal, to obtain a cancellation signal of the first self-interference signal; and the first device cancels the first self-interference signal from the second receive signal based on the cancellation signal of the first self-interference signal.

Abstract: A method of cleaning a plasma chamber is disclosed. Periodically, a cleaning process is performed. The cleaning process comprises introducing a mixture of fluoride molecules and argon into the plasma chamber and creating a plasma. The fluoride molecules are ionized and interact with the deposited material on the chamber walls. This causes the fluorine ions to bond to the deposited material, which typically results in a gas that can be exhausted from the plasma chamber. When the deposited material has been removed, the amount of free fluorine within the plasma chamber increases. This increase in fluorine may be used to determine when the plasma chamber is cleaned.

Abstract: A voice generation method and apparatus, an electronic device, and a computer readable storage medium. Said method comprises: performing speaker segmentation on an original voice to determine starting time and ending time of each speaking voice segment in the original voice, so as to obtain segmented voices; determining a voiceprint feature vector corresponding to each speaking voice segment in the original voice; converting a text corresponding to each speaking voice segment in the original voice into a target language text, to obtain a target language text corresponding to each speaking voice segment in the original voice; and generating a target voice on the basis of the starting time and the ending time of each speaking voice segment in the original voice, the voiceprint feature vectors corresponding to the speaking voice segments and the target language texts corresponding to the speaking voice segments.

Abstract: A chemical culture system and use thereof. The chemical culture system comprises a basic culture medium and a small molecule compound, and forms a serum-free culture system having a clear chemical composition. The culture medium does not use substitute serum B27 and GS21 which contain animal-derived components and are widely used currently, but uses a pure chemical molecule activation signal pathway, and uses a non-animal-derived growth factor to replace an animal-derived growth factor, and thus the composition is clear, the potential risks caused by the existence of serum and animal-derived components are avoided, and the clinical prospect of nerve cell transplantation is expanded.

Abstract: A speech processing method is provided. The method includes: receiving a speech block to be identified as a current speech block, where the speech block includes a past frame, a current frame and a future frame; performing a speech identification process based on the current speech block, where the speech identification process includes: performing speech identification based on the current speech block to obtain a speech identification result of the current frame and a speech identification result of the future frame; determining whether a previous speech block for the current speech block exists; in a case that the previous speech block for the current speech block exists, updating a target identification result based on the speech identification result of the current frame of the current speech block; and outputting the speech identification result of the future frame of the current speech block.

Abstract: Provided is a new use of a TGF-? small molecule inhibitor in the field of neuroregeneration, which can be used for the in vitro regeneration and directed differentiation of various nerve cells and brain-like organs. By adding same to a set of basal media having clear chemical compositions. pluripotent stem cells can be induced into adult cells derived from a variety of neural stem cells, and the number of induced nerve cells and the size of organoids can be greatly increased. The induction system provided in the present invention expands new functions of a single small molecule in the field of ectodermal cell induction and differentiation and at the same time avoids the use of B27 and other serum substitutes, thereby completely avoiding the potential risks caused by the presence of animal-derived components in cell culture processes, and greatly expanding the clinical prospects of a variety of nerve cell transplantations.

Abstract: A voice processing method, comprising: segmenting a voice to be processed into at least one voice segment; generating at least one first voice on the basis of a clustering result of the at least one voice segment; performing feature extraction on each of the at least one first voice, to obtain a voiceprint feature vector corresponding to each first voice; and generating a second voice on the basis of the voiceprint feature vector, the second voice being an unmixed voice of the same sound source. Further disclosed are a voice processing apparatus, an electronic device, and a computer readable medium. By performing feature extraction on the first voice and further performing voice separation on the first voice, a more accurate second voice is obtained, thereby improving the overall voice segmentation effect.

Abstract: The invention provides a method of treating preeclampsia, fetal growth restriction (FGR or IUGR), obesity in pregnancy, post-partum cardiomyopathy (heart failure in mothers), cancer and diabetic retinopathy, cardiomyopathy, myocardial infarction, wet microdegeneration and other disorders where angiogenesis is aberrant either diminished or exacerbated, comprising modulating the activity of micro RNA (miRNA). Also provided are an MiRNA modulator or a combination thereof or functional fragments or homologues thereof for use in the treatment of preeclampsia, fetal growth restriction, obesity in pregnancy, cancer, and diabetic retinopathy, cardiomyocyte infarction, wet microdegeneration as well as other disorder where angiogenesis is aberrant either diminished or exacerbated. Methods of modulating angiogenesis and pharmaceutical compositions using miR-122, miR-374b or inhibitors of miR-152 or miR195 are also provided together with methods of diagnosis using the miRNAs.

Abstract: Provided is a human-derived sensory neuron induction culture system. A combination of a small molecule inhibitor LY2157299 and a growth factor is added into a serum-free basal medium. Compared with an induction method involving serum, not only is the efficiency of inducing pluripotent stem cells into sensory neurons greatly improved, but the expression of a variety of ion channel proteins is also significantly improved, thereby achieving successful induction of multiple induced pluripotent stem cells from different sources into sensory neurons.

Abstract: Exemplary methods of manufacturing a semiconductor cover wafer may include sintering aluminum nitride particles into a substrate characterized by a thickness and characterized by a disc shape. The methods may include grinding a surface of the substrate to reduce the thickness to less than or about 2 mm. The methods may include polishing the surface of the substrate to reduce a roughness. The methods may include annealing the substrate at a temperature of greater than or about 800° C. for a time period of greater than or about 60 minutes.

Abstract: The retrievable packer system includes a packer mandrel, a lock ring, an upper cone, a lower cone, a slip device, a retrieval mandrel, and a plurality of push rods. The lock ring is attached to the packer mandrel, followed by the upper cone, the slip device, the lower cone, and the retrieval mandrel. The lower cone has lower cone rod channels, and the push rods anchored on the retrieval mandrel slide through respective channels toward the upper cone. The packer system is run into the borehole with each rod in the first position relative to a tip end of the lower cone and the slip device in the run-in position. The packer system is set and can be locked at a location in the borehole. Each push rod can push the upper cone to return the slip device to the run-in position for retrieval of the packer system.

Abstract: This application discloses example beam direction adjustment methods, apparatuses, and media. One example method includes obtaining at least one of an azimuth or a pitch angle of a microwave antenna in an antenna system, where the antenna system includes the microwave antenna and a radome installed at an air interface of the microwave antenna, the radome includes a liquid crystal array including M×N liquid crystal cells, and both M and N are integers greater than 0. A target scanning angle of the microwave antenna is determined based on at least one of the azimuth or the pitch angle. A first bias voltage value of the liquid crystal array is determined based on the target scanning angle. A voltage of the liquid crystal array is set to the first bias voltage value.

Abstract: The retrievable packer system includes a packer mandrel, a lock ring, an upper cone, a lower cone, a slip device, a retrieval mandrel, and a plurality of push rods. The lock ring is attached to the packer mandrel, followed by the upper cone, the slip device, the lower cone, and the retrieval mandrel. The lower cone has lower cone rod channels, and the push rods anchored on the retrieval mandrel slide through respective channels toward the upper cone. The packer system is run into the borehole with each rod in the first position relative to a tip end of the lower cone and the slip device in the run-in position. The packer system is set and can be locked at a location in the borehole. Each push rod can push the upper cone to return the slip device to the run-in position for retrieval of the packer system.

Abstract: A method includes: A first device sends a first signal to a second device, where the first signal includes a first transmit signal and a first pilot signal; the first device obtains a second signal, where the second signal includes a first self-interference signal, a second pilot signal, and a second receive signal from the second device; the first device extracts jitter information of the first self-interference signal based on the first pilot signal and the second pilot signal; the first device reconstructs a self-interference signal based on the first transmit signal and the jitter information of the first self-interference signal, to obtain a cancellation signal of the first self-interference signal; and the first device cancels the first self-interference signal from the second receive signal based on the cancellation signal of the first self-interference signal.