Abstract: A push gateway brokers messages between backend services and client devices connected to the gateway. The gateway includes a plurality of messaging frontend servers, a messaging database, and a plurality of topic servers. The messaging frontend servers manage the socket connections connecting the client devices to the push gateway. The messaging frontend servers may further monitor the socket connections, collecting analytical data on the client devices and the connections. The messaging database is a key-value database that subscribes messaging frontend servers to topics. The topic servers receive publish requests from the backend servers to identify subscribed messaging frontend servers in the messaging database to push messages out to. The frontend messaging servers subsequently push out the message to the client devices subscribed to the topic.

Abstract: A line current iM(k0) of an M side of a first direct-current transmission line is collected at a moment k0. A line current iM(k0?ts) thereof is collected at k0?ts. At a moment k0, a differential value diM(k0) of a current of the side of the first direct-current transmission line is calculated according to the line current iM(k0) and the line current iM(k0?ts). It is determined whether the differential value diM(k0) of the current meets a protection enabling criteria. If so, direct-current protection for the M side of the first direct-current transmission line is enabled. A line current iM(j) of the M side of the first direct-current transmission line is collected at a moment j. A line current iM(j?ts) thereof is collected at a moment j?ts. A differential value diM(j) of the current of the M side of the first direct-current transmission line at the moment j is calculated according to the line current iM(j) and the line current iM(j?ts).

Abstract: A compound represented by general formula (I) or a stereoisomer, tautomer, deuterated substance, solvate, prodrug, metabolite, pharmaceutically acceptable salt or co-crystal thereof, an intermediate thereof and a preparation method therefor, as well as an application in preparation of a drug for treating diabetes.

Abstract: A push gateway brokers messages between backend services and client devices connected to the gateway. The gateway includes a plurality of messaging frontend servers, a messaging database, and a plurality of topic servers. The messaging frontend servers manage the socket connections connecting the client devices to the push gateway. The messaging frontend servers may further monitor the socket connections, collecting analytical data on the client devices and the connections. The messaging database is a key-value database that subscribes messaging frontend servers to topics. The topic servers receive publish requests from the backend servers to identify subscribed messaging frontend servers in the messaging database to push messages out to. The frontend messaging servers subsequently push out the message to the client devices subscribed to the topic.

Abstract: The present invention relates to a method for preparing, activating and regenerating a metal supported catalyst, comprising: treating a Ma-Mb-Mc metal supported catalyst at 10-700° C. by using an ammonia or nitrogen-containing organic matter, wherein the Ma metal is an active metal selected from one or more of a noble metal atom or a transition metal, the support is a common industrial porous catalyst, and the Ma metal is dispersed on the support in a state of single atomic site. According to the Md-Mb-Mc metal supported noble metal/zinc catalyst treated by the method of the present invention, the direct dehydrogenation conversion rate and selectivity of catalyzing light alkanes are remarkably improved; the method for preparing the catalyst is simple in process, the catalytic activity after regeneration is still kept, and the catalyst can be industrially produced on a large scale.

Abstract: The present invention relates to a preparation method for a noble metal single atom three-way catalyst, a catalyst obtained by using the method, and a use of the catalyst for purifying motor vehicle exhaust gas. In the present invention, a nitrogen-containing compound is used for treating a noble metal single atom catalyst precursor, avoiding the agglomeration of noble metal single atoms into nanocrystalline particles. The catalyst obtained by the preparation method of the present invention is resistant to high temperature, is not prone to agglomerate, and is resistant to poisoning, and the amount of usage of noble metals is reduced while the purification efficiency of the catalyst for motor vehicle exhaust gas is effectively improved.

Abstract: A method and device for acquiring a scheduled throughput, a base station, a non-transitory computer-readable storage medium, and an electronic device are disclosed. The method comprises: buffering a user service request message received; allocating a downlink data scheduling resource according to a data size of the user service request message, wherein in response to a size of the allocated downlink data scheduling resource being greater than or equal to the data size of the user service request message buffered, a scheduling type of the current scheduling is determined as non-full scheduling, and in response to the size of the allocated downlink data scheduling resource being less than the data size of the buffered user service request message, the scheduling type of the current scheduling is determined as full scheduling; and acquiring a scheduled throughput according to a downlink data scheduling resource allocation result and the scheduling type.

Abstract: Disclosed is a preparation method for tricalcium silicate powder. The method includes the following steps: taking CaCO3 powder and SiO2 powder as raw materials for preparation, so as to obtain mixed powder having uniform components; pre-pressing the obtained mixed powder to make a blank; and performing sintering treatment on the obtained blank at a temperature of 1,200 DEG C-1,500 DEG C for 0.5 h-1.5 h, so as to obtain tricalcium silicate, where the sintering treatment is to perform mixed sintering by using auxiliary heating bodies and in cooperation with microwave treatment. According to the present disclosure, the tricalcium silicate is prepared through mixed sintering by using the auxiliary heating bodies and in cooperation with the microwave treatment, and a mixed heating mechanism enables a sample to be heated more easily at a low temperature, so that synthesis purity and efficiency are improved.

Abstract: Provided is a method for evaluating and utilizing sonnenbrand basalt aggregate, including steps as follows: mixing a basalt aggregate defined as sonnenbrand basalt into an asphalt mixture; carrying out thermal aging experiments at different temperatures and durations to obtain a theoretical trigger time ti for the sonnenbrand phenomenon under a thermal aging temperature Ti; further calculating to obtain a theoretical thermal aging factor AF0 for the sonnenbrand phenomenon; statistically calculating a thermal aging factor AF for an actual construction to evaluate a performance of the basalt aggregate, if AF<AF0, the construction may be carried out normally, if AF?AF0, then shortening the transportation and waiting duration and/or lowering the factory temperature of the asphalt mix so that the thermal aging factor AF<AF0 during actual construction.

Abstract: Provided is a method for evaluating and utilizing sonnenbrand basalt aggregate, including steps as follows: mixing a basalt aggregate defined as sonnenbrand basalt into an asphalt mixture; carrying out thermal aging experiments at different temperatures and durations to obtain a theoretical trigger time ti for the sonnenbrand phenomenon under a thermal aging temperature Ti; further calculating to obtain a theoretical thermal aging factor AF0 for the sonnenbrand phenomenon; statistically calculating a thermal aging factor AF for an actual construction to evaluate a performance of the basalt aggregate, if AF<AF0, the construction may be carried out normally, if AF?AF0, then shortening the transportation and waiting duration and/or lowering the factory temperature of the asphalt mix so that the thermal aging factor AF<AF0 during actual construction.

Abstract: A method and device for acquiring a scheduled throughput, a base station, a non-transitory computer-readable storage medium, and an electronic device are disclosed. The method comprises: buffering a user service request message received; allocating a downlink data scheduling resource according to a data size of the user service request message, wherein in response to a size of the allocated downlink data scheduling resource being greater than or equal to the data size of the user service request message buffered, a scheduling type of the current scheduling is determined as non-full scheduling, and in response to the size of the allocated downlink data scheduling resource being less than the data size of the buffered user service request message, the scheduling type of the current scheduling is determined as full scheduling; and acquiring a scheduled throughput according to a downlink data scheduling resource allocation result and the scheduling type.

Abstract: A method for taping a wafer is disclosed. A wafer taping device comprising a wafer stage is provided. A wafer is mounted and secured on the wafer stage. A tape is delivered along a first direction over the wafer. The tape is forced into adhesion with a surface of the wafer in a non-contact manner. The tape is cut along a perimeter of the wafer.

Abstract: Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds, wherein a photoisomeric compound-graphene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve a high reversibility and a good reproducibility. The number of light-controlled switching cycles can exceed 104, and the number of electrically-controlled switching cycles can reach about 105 or greater. Moreover, the above-mentioned reversible molecular switch device remains stable within a period of more than one year.

Abstract: The invention provides a gas flow metering gas chamber and a gas flow meter. The gas flow meter includes the gas flow metering gas chamber, a display device and a housing. The gas flow meter gas cell includes a cavity, a gas inlet, a gas outlet, two ultrasonic transducer mounting holes and a reflection device. The signal emitted by the first ultrasonic transducer installed in the first ultrasonic transducer mounting hole and the signal emitted by the second ultrasonic transducer installed in the second ultrasonic transducer mounting hole intersects with each other to form an L-shaped reflection passage. Compared with V-shaped, W-shaped, and N-shaped reflection structures, the effective distance between the two ultrasonic transducers of the present invention more is increased, the cross section of the cavity is reduced, and the rate of the gas flow is increased, which avoids contamination contained in the measured gas to contaminate the ultrasonic transducers and thereby improves the measurement accuracy.

Abstract: A method for taping a wafer is disclosed. A wafer taping device comprising a wafer stage is provided. A wafer is mounted and secured on the wafer stage. A tape is delivered along a first direction over the wafer. The tape is forced into adhesion with a surface of the wafer in a non-contact manner. The tape is cut along a perimeter of the wafer.

Abstract: A method for taping a wafer is disclosed. A wafer taping device comprising a wafer stage is provided. A wafer is mounted and secured on the wafer stage. A tape is delivered along a first direction over the wafer. The tape is forced into adhesion with a surface of the wafer in a non-contact manner. The tape is cut along a perimeter of the wafer.

Abstract: Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds, wherein a photoisomeric compound-graphene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve a high reversibility and a good reproducibility. The number of light-controlled switching cycles can exceed 104, and the number of electrically-controlled switching cycles can reach about 105 or greater. Moreover, the above-mentioned reversible molecular switch device remains stable within a period of more than one year.

Abstract: The present disclosure relates to the field of integrated circuits protection, and specifically discloses an electrostatic protection circuit and a semiconductor structure. The electrostatic protection circuit is disposed between a first port and a second port that require electrostatic protection, comprising at least one interdigital loop and a control circuit electrically connected to the interdigital loop. The interdigital loop comprises an electrostatic protection transistor having a drain electrically connected to the first port and a source electrically connected to the second port. The control circuit comprises a first transistor and a second transistor. The drain of the first transistor and the gate of the second transistor are electrically connected to the first port. The drain of the second transistor and the gate of the first transistor are electrically connected to the second port.

Abstract: Preshared keys are assigned to client devices, users, or user groups. The set of valid preshared keys or keys derived therefrom is distributed to network devices such as wireless access points. A client device attempts to establish a secure network connection with a network device using its assigned preshared key. A network device identifies the client device's preshared key by selecting a candidate key from its set of valid preshared keys. The network device determines a validation cryptographic checksum based on the selected candidate key. If the validation cryptographic checksum matches the client's cryptographic checksum, the network device establishes a secure network connection with the client device using this candidate key. If the validation cryptographic checksum does not match the cryptographic checksum provided by the client device, the network device repeats this comparison using different candidate keys selected from its set of valid preshared keys until a match is found.

Abstract: Disclosed is a method of modeling a multi-mode degradation process and predicting a remaining useful life, which belongs to the technical field of health management.