Abstract: Methods, systems and computer devices are provided for adjusting a frame-listening cycle. The method includes: configuring, by a server, a fixed frame-listening cycle of an electronic shelf label according to a time period; and sending, by the server, a second frame-listening cycle modification command through a base station when the server is to issue the fast response service during the low power consumption time period, so that the electronic shelf label modifies the current frame-listening cycle to a fast frame-listening cycle according to the second frame-listening cycle modification command. According to the present disclosure, the electronic shelf label can not only respond to the fast response service in real time, but also keep the low power consumption of a long frame-listening cycle, thereby simultaneously satisfying the requirements of high real-time performance and low power consumption of the electronic shelf label.

Abstract: A shelf label system and a method thereof are provided. The shelf label system includes base stations and at least one server. The at least one server may be configured to: obtain a target network topological structure according to a master base station having a shallowest topological depth and a ranging result between a base station and a superior base station of the base station, where each base station has a single superior base station; generate a transceiving time slot periodic table by allocating a transceiving time slot to each base station according to the target network topological structure; and obtain a synchronous network of the shelf label system by instructing the base stations to transmit and receive synchronous signals according to the transceiving time slot periodic table. The shelf label system further includes electronic shelf labels that receive the synchronous signals from the base stations.

Abstract: A dynamic frequency allocation method for base stations, a shelf label system and a computer device are provided. The method includes: obtaining a current connectivity structure of base stations; obtaining a current weight degree of each base station based on a frequency interval weight between base stations in the current connectivity structure; performing priority classification on all current base stations to obtain a current priority type of each base station; and obtaining a current allocated frequency of each base station based on the current priority type of the base station, the current weight degree of the base station, the frequency interval weight and a current available frequency set.

Abstract: Methods, systems and computer devices are provided for adjusting a frame-listening cycle. The method includes: configuring, by a server, a fixed frame-listening cycle of an electronic shelf label according to a time period; and sending, by the server, a second frame-listening cycle modification command through a base station when the server is to issue the fast response service during the low power consumption time period, so that the electronic shelf label modifies the current frame-listening cycle to a fast frame-listening cycle according to the second frame-listening cycle modification command. According to the present disclosure, the electronic shelf label can not only respond to the fast response service in real time, but also keep the low power consumption of a long frame-listening cycle, thereby simultaneously satisfying the requirements of high real-time performance and low power consumption of the electronic shelf label.

Abstract: A spectrum splitting, transmissive concentrating photovoltaic (tCPV) module is proposed and designed for a hybrid photovoltaic-solar thermal (PV/T) system. The system may be able to fully utilize the full spectrum of incoming sunlight. By utilizing III-V triple junction solar cells with bandgaps of approximately 2.1 eV, 1.7 eV, and 1.4 eV in the module, ultraviolet (UV) and visible light (in-band light) are absorbed and converted to electricity, while infrared (IR) light (out-of-band light) passes through and is captured by a solar thermal receiver and stored as heat. The stored heat energy may be dispatched as electricity or process heat as needed. The tCPV module may have an overall power conversion efficiency exceeding 43.5% for above bandgap (in-band) light under a standard AM1.5D solar spectrum with an average concentration ratio of 400 suns. Passive and/or active cooling methods may be used to keep cells below 110° C.

Abstract: Disclosed are a control method for electronic price tags, an electronic price tag and an electronic price tag system. The control method comprises: receiving at least one first service instruction by a wireless communication module, and receiving at least one second service instruction by a short-distance communication module; and performing, by a fusion processing module, fusion processing on the at least one first service instruction and the at least one second service instruction, which are of a same service type and have an effective duration overlap therebetween, to enable a response module to respond synchronously according to control parameters obtained after fusion processing.

Abstract: Methods, systems and computer devices are provided for adjusting a frame-listening cycle. The method includes: configuring, by a server, a fixed frame-listening cycle of an electronic shelf label according to a time period; and sending, by the server, a second frame-listening cycle modification command through a base station when the server is to issue the fast response service during the low power consumption time period, so that the electronic shelf label modifies the current frame-listening cycle to a fast frame-listening cycle according to the second frame-listening cycle modification command. According to the present disclosure, the electronic shelf label can not only respond to the fast response service in real time, but also keep the low power consumption of a long frame-listening cycle, thereby simultaneously satisfying the requirements of high real-time performance and low power consumption of the electronic shelf label.

Abstract: A dynamic frequency allocation method for base stations, a shelf label system and a computer device are provided. The method includes: obtaining a current connectivity structure of base stations; obtaining a current weight degree of each base station based on a frequency interval weight between base stations in the current connectivity structure; performing priority classification on all current base stations to obtain a current priority type of each base station; and obtaining a current allocated frequency of each base station based on the current priority type of the base station, the current weight degree of the base station, the frequency interval weight and a current available frequency set.

Abstract: A shelf label system and a method thereof are provided. The shelf label system includes base stations and at least one server. The at least one server may be configured to: obtain a target network topological structure according to a master base station having a shallowest topological depth and a ranging result between a base station and a superior base station of the base station, where each base station has a single superior base station; generate a transceiving time slot periodic table by allocating a transceiving time slot to each base station according to the target network topological structure; and obtain a synchronous network of the shelf label system by instructing the base stations to transmit and receive synchronous signals according to the transceiving time slot periodic table. The shelf label system further includes electronic shelf labels that receive the synchronous signals from the base stations.

Abstract: A dynamic frequency allocation method for base stations, a shelf label system and a computer device are provided. The method includes: obtaining a current connectivity structure of base stations; obtaining a current weight degree of each base station based on a frequency interval weight between base stations in the current connectivity structure; performing priority classification on all current base stations to obtain a current priority type of each base station; and obtaining a current allocated frequency of each base station based on the current priority type of the base station, the current weight degree of the base station, the frequency interval weight and a current available frequency set.

Abstract: A shelf label system and a method thereof are provided. The shelf label system includes base stations and at least one server. The at least one server may be configured to: obtain a target network topological structure according to a master base station having a shallowest topological depth and a ranging result between a base station and a superior base station of the base station, where each base station has a single superior base station; generate a transceiving time slot periodic table by allocating a transceiving time slot to each base station according to the target network topological structure; and obtain a synchronous network of the shelf label system by instructing the base stations to transmit and receive synchronous signals according to the transceiving time slot periodic table. The shelf label system further includes electronic shelf labels that receive the synchronous signals from the base stations.

Abstract: A hybrid receiver for a concentrator photovoltaic-thermal power system combines a concentrator photovoltaic (CPV) module and a thermal module that converts concentrated sunlight into electrical energy and thermal heat. Heat transfer fluid flowing through a cooling block removes waste heat generated by photovoltaic cells in the CPV module. The heat transfer fluid then flows through a helical tube illuminated by sunlight that misses the CPV module. Only one fluid system is used to both remove the photovoltaic-cell waste heat and capture high-temperature thermal energy from sunlight. Fluid leaving the hybrid receiver can have a temperature greater than 200° C., and therefore may be used as a source of process heat for a variety of commercial and industrial applications. The hybrid receiver can maintain the photovoltaic cells at temperatures below 110° C. while achieving overall energy conversion efficiencies exceeding 80%.

Abstract: The present disclosure provides a device and method for position detection of electronic shelf labels. The device comprises: a lighting control module configured to send a lighting signal to electronic shelf labels; electronic shelf labels configured to receive the lighting signal and light up according to their respective preset lighting rules; a camera configured to take photos of the electronic shelf labels being lighting up according to a preset photographing rule to obtain image data of the electronic shelf labels; a detection module configured to determine positions of the electronic shelf labels on a shelf based on the image data of the electric shelf labels. The present disclosure can automatically detect positions of the electronic shelf labels on the shelf with high efficiency.

Abstract: A method and device for positioning an electronic price tag based on a neighbor relationship, comprising: obtaining a plurality of electronic price tag reports, wherein each electronic price tag report includes an identity of a neighbor electronic price tag or an anchor point received by the electronic price tag and a weight of the neighbor electronic price tag received within a limited time slice, and the position of the anchor point is known; determining connection relationships between the electronic price tag to be positioned and all anchor points based on the plurality of electronic price tag reports; determining path values between the electronic price tag to be positioned and each anchor point respectively based on the connection relationships, and sorting the path values from small to large to obtain first two path values in order.

Abstract: The use of photovoltaic (PV) cells to convert solar energy to electricity is becoming increasingly prevalent; however, there are still significant limitations associated with the widespread adoption of PV cells for electricity needs. There is a clear need for a high efficiency solar power system that supplies electricity at a competitive cost and that provides for an on-demand supply of electricity as well as energy storage. By combining aspects of concentrated solar power and concentrated photovoltaics, the present invention provides a device that enables the conversion of sunlight to electricity at very high efficiencies and that enables the transmission of thermal energy to heat storage devices for later use. The disclosed device enables transmissive CPV through the use of a multijunction PV cell mounted on a transparent base. The use of a multijunction cell allows for highly efficient absorption of light above the bandgap of the lowest bandgap subcell.

Abstract: A spectrum splitting, transmissive concentrating photovoltaic (tCPV) module is proposed and designed for a hybrid photovoltaic-solar thermal (PV/T) system. The system may be able to fully utilize the full spectrum of incoming sunlight. By utilizing III-V triple junction solar cells with bandgaps of approximately 2.1 eV, 1.7 eV, and 1.4 eV in the module, ultraviolet (UV) and visible light (in-band light) are absorbed and converted to electricity, while infrared (IR) light (out-of-band light) passes through and is captured by a solar thermal receiver and stored as heat. The stored heat energy may be dispatched as electricity or process heat as needed. The tCPV module may have an overall power conversion efficiency exceeding 43.5% for above bandgap (in-band) light under a standard AM1.5D solar spectrum with an average concentration ratio of 400 suns. Passive and/or active cooling methods may be used to keep cells below 110° C.

Abstract: The use of photovoltaic (PV) cells to convert solar energy to electricity is becoming increasingly prevalent; however, there are still significant limitations associated with the widespread adoption of PV cells for electricity needs. There is a clear need for a high efficiency solar power system that supplies electricity at a competitive cost and that provides for an on-demand supply of electricity as well as energy storage. By combining aspects of concentrated solar power and concentrated photovoltaics, the present invention provides a device that enables the conversion of sunlight to electricity at very high efficiencies and that enables the transmission of thermal energy to heat storage devices for later use. The disclosed device enables transmissive CPV through the use of a multijunction PV cell mounted on a transparent base. The use of a multijunction cell allows for highly efficient absorption of light above the bandgap of the lowest bandgap subcell.