Abstract: This disclosure discloses signal configuration methods and apparatuses. In an implementation, a method comprises: generating at least two reference signals of a same type corresponding to at least two antenna ports indicated to a terminal device, wherein the at least two reference signals comprise a first reference signal and a second reference signal, wherein a first sequence of the first reference signal is obtained based on a first initialization factor determined based on an index of a first code division multiplexing (CDM) group, and wherein a second sequence of the second reference signal different from the first sequence is obtained based on a second initialization factor determined based on an index of a second CDM group; and transmitting the at least two reference signals.

Abstract: An epitaxial structure and a manufacturing method thereof, and a light-emitting diode (LED) device are provided. The epitaxial structure includes an N-type semiconductor layer, a multiple quantum well (MQW) active layer, and a P-type semiconductor layer sequentially stacked in a growth direction. The MQW active layer includes a front MQW active layer and a back MQW active layer sequentially stacked in the growth direction. The front MQW active layer includes at least two groups of first quantum barrier layers and first quantum well layers alternately stacked. The back MQW active layer includes at least two groups of second quantum barrier layers and second quantum well layers alternately stacked. A content of an aluminum (Al) component in each second quantum well layer is gradually increased in the growth direction, and a content of a gallium (Ga) component in each second quantum well layer is gradually decreased in the growth direction.

Abstract: An epitaxial wafer of a light-emitting chip, a method for manufacturing an epitaxial wafer, and a light-emitting chip are provided. A light-emitting layer (5) of an active region of the epitaxial wafer of the light-emitting chip includes at least one superlattice (51), and each superlattice includes: a quantum well sub-layer (511) and a stress conversion sub-layer (512) which is formed on the quantum well sub-layer (511) and enables the quantum well sub-layer (511) to be converted from compressive strain to tensile strain, and the stress conversion sub-layer (512) and the quantum well sub-layer (511) form a two-dimensional electron gas.

Abstract: A method for preparing all-solid-state photonic crystal fiber preform by extrusion by aligning the center of the first jacking end of the first jacking rod with the center of the core outlet mold. The adverse effect on this part of extruded core glass by oxygen or other impurities in air during the extrusion out of the core outlets can be avoided. The defects on the core glass surface and the cladding glass surface can be effectively removed, and the purity and quality of the core component in the obtained fiber preform can be improved.

Abstract: Wire grid polarizer and manufacturing method thereof are provided, the wire grid polarizer includes: substrate; first wire grid formed on substrate, including first wire grid reflection strips arranged parallel to each other and at equal intervals; second wire grid formed at a side of first wire grid away from substrate, including second wire grid reflection strips arranged in parallel to each other and at equal intervals; second wire grid reflection strips are in one-to-one correspondence with first wire grid reflection strips; orthographic projections of second wire grid reflection strip onto substrate falls within orthographic projections of corresponding first wire grid reflection strip onto substrate; wire width of second wire grid reflection strip is less than that of first wire grid reflection strip; and wire spacing of second wire grid reflection strip is greater than that of the first wire grid reflection strip.

Abstract: The present invention discloses a method for preparing all-solid-state photonic crystal fiber preform by extrusion. Firstly, aligning the center of the first jacking end of the first jacking rod with the center of the core outlet mold. The adverse effect on this part of extruded core glass by oxygen or other impurities in air during the extrusion out of the core outlets can be avoided. The defects on the core glass surface and the cladding glass surface can be effectively removed, and the purity and quality of the core component in the obtained fiber preform can be improved.

Abstract: A system and computer-implemented method to manage alerts, wherein the method includes receiving anomaly triggers associated with detected anomalies, associating an anomaly trigger of the received anomaly triggers with an alert, tracking the alert using a state machine, determining whether to change a state of the state machine if a subsequent anomaly trigger associated with the alert is received or if a predetermined amount of time passes without receiving trigger information, and generating an alarm based on the state of the state machine.

Abstract: A system and computer-implemented method to manage alerts, wherein the method includes receiving anomaly triggers associated with detected anomalies, associating an anomaly trigger of the received anomaly triggers with an alert, tracking the alert using a state machine, determining whether to change a state of the state machine if a subsequent anomaly trigger associated with the alert is received or if a predetermined amount of time passes without receiving trigger information, and generating an alarm based on the state of the state machine.

Abstract: A bioactive glass scaffold treated to modify the surface of the bioactive glass scaffold for regenerating new bone tissue is disclosed. In some embodiments, the bioactive glass scaffold may include pores in a grid-like structure to promote the ingrowth of bone tissue, and the modified surface layer may include a hydroxyapatite-like surface. The bioactive glass scaffold is inexpensive and easy to fabricate and regenerates new bone faster than the existing synthetic implants. The bioactive glass scaffold may be loaded with a biomolecule, such as BMP-2, for delivery to the implantation site.

Abstract: Ceramic porous and non-porous articles are made by a process that includes a hardening step in which a fluid-containing ceramic composition is exposed to a solvent in which the fluid in the composition is soluble before the ceramic composition is solidified into the final ceramic article.

Abstract: Ceramic articles as functional biodegradable scaffolds with graded porosity are made by a process that includes a hardening step in which the liquid of a liquid-containing ceramic composition is extracted from the ceramic composition by exposing the ceramic composition to a solvent in which the liquid in the composition is soluble before the ceramic composition is solidified into the final ceramic article. An exemplary calcium phosphate porous ceramic article constructed in accordance with the process is useful as an implant to repair a bone defect.

Abstract: Ceramic porous and non-porous articles are made by a process that includes a hardening step in which a fluid-containing ceramic composition is exposed to a solvent in which the fluid in the composition is soluble before the ceramic composition is solidified into the final ceramic article.