Abstract: Implementations for a space-optimized graph database system are provided. One implementation includes a computing system comprising: processing circuitry and memory storing instructions that causes the processing circuitry to: store a graph database comprising an initial tree graph storing a plurality of data entries, each data entry comprising a respective field identifier; receive a query to update the graph database, wherein the query comprises a request to add a new data entry; determine a splitting event to perform based on one or more predetermined criteria; generate a new tree graph corresponding to a field identifier of the new data entry by splitting off a subset of the plurality of data entries of the initial tree graph, wherein the subset comprises all data entries of the initial tree graph that correspond to the field identifier of the new data entry; and update the new tree graph in accordance with the query.

Abstract: Implementations for I/O efficient synchronization on a graph database are provided. One example includes a computing system comprising: processing circuitry and memory storing instructions that, during execution, causes the processing circuitry to: implement the graph database using at least: a read-write node and a read-only node operating in cache memory; and a shared storage for data persistence, wherein the shared storage stores a mapping table of the graph database; receive an update query; update the read-write node based on the update query; write, using the read-write node, a set of logs corresponding to the update query to a write-ahead log journal in the shared storage; and retrieve, using the read-only node, the set of logs from the write-ahead log journal.

Abstract: Implementations for performing workload-aware space reclamation are provided. One example includes a computing system comprising: processing circuitry and memory storing instructions that, during execution, causes the processing circuitry to: track extent usage characteristics for each of a plurality of extents storing data for a graph database; and perform memory reclamation to reclaim storage areas corresponding to invalid data, wherein performing the memory reclamation comprises: generating a list of extents to be reclaimed based on the tracked extent usage characteristics; and reclaiming memory space on the plurality of extents in order based on the list of extents.

Abstract: The present application relates to processes for the preparation of quinolone compounds and intermediates thereof, particularly to processes for the preparation of quinolones and pharmaceutical intermediates of the quinolones. In particular, the present application provides a process for the preparation of a compound of Formula I, and a process for the synthesis of quinolone compounds using the compound of Formula I as an intermediate.

Abstract: A fresh air integrated machine includes a housing, a fresh air channel, a circulating air channel, an air mixing cavity, a first heat exchanger, and a second heat exchanger. The fresh air channel is configured to introduce outdoor air into the air mixing cavity. The circulating air channel is configured to introduce indoor air into the air mixing cavity. The first heat exchanger is disposed in the fresh air channel and configured to adjust humidity and temperature of air in the fresh air channel. The second heat exchanger is disposed in the circulating air channel and configured to adjust humidity and temperature of air in the circulating air channel.

Abstract: An economic and reliable fiber hermetic sealing for small devices includes partially stripped optical fibers optically aligned, fixed at one end aligned with an optical source, and a cylindrical solder glass with one or multiple through holes which diameters are greater than those of the stripped fibers. A glass solder preform is contained in a ferrule structure which diameter is bigger than that of said solder glass outer diameter. The ferrule wall around the solder glass is lower than said solder glass height. The solder glass preform sits on a stepped hole with 25-75 degrees chamfered. The glass solder melts at high temperatures and flow into small hole section where the fiber is hermetically sealed and retained. An epoxy with a good adhesion to fiber coating and fiber glass is filled in the cavity blocked by molten solder glass.

Abstract: An external cavity tunable laser includes a gain median module to generate a broadband optical spectrum covering a predetermined wavelength range; a collimate lens turning a diverging beam into a collimated beam; a pair of etalons to tune frequency; an actuator to adjust an external cavity optical pathlength; a bandpass filter to block one or more frequencies outside the predetermined wavelength range; a beam splitter to split a percentage of the beam to a photodetector; a reflection mirror for feedback to gain median waveguide; an isolator for preventing reflecting light back to the external cavity; and a hermetically sealed housing less than 0.15 cubic centimeters.

Abstract: The embodiments of the present disclosure provide a plug, an interface device and an identification method thereof. The plug includes at least one insulating pin row including a plurality of insulating pins, a conductive pin which is stretchable and retractable along an axis direction is provided on at least one side of a central line of each of the at least one insulating pin row, and the conductive pin is arranged between two adjacent insulating pins of the plurality of insulating pins.

Abstract: An application, in preparation of medicine for preventing or treating a disease related to a tyrosine kinase, of a compound as represented by formula I, or a pharmaceutically acceptable salt, an ester, a solvate, a prodrug, an active metabolite, a crystal, a stereoisomer, a tautomer, or a geometric isomer thereof, or a pharmaceutical composition comprising the compound as represented by formula I or the pharmaceutically acceptable salt, ester, solvate, prodrug, active metabolite, crystal, stereoisomer, tautomer, or geometric isomer thereof.

Abstract: The embodiments of the present disclosure provide a plug, an interface device and an identification method thereof. The plug includes at least one insulating pin row including a plurality of insulating pins, a conductive pin which is stretchable and retractable along an axis direction is provided on at least one side of a central line of each of the at least one insulating pin row, and the conductive pin is arranged between two adjacent insulating pins of the plurality of insulating pins.

Abstract: The present disclosure relates to the field of riding equipment, and particularly to a headband and a multifunctional helmet. The headband comprises a strap configured to bind a head, an adjustment assembly that adjusts the tightness of the strap, and an electronic device that endows the headband with intelligent properties. The strap is connected to the adjustment assembly, and the electronic device is disposed within the adjustment assembly and connected to the adjustment assembly. The headband is an accessory of the helmet, electronic devices are combined with the headband such that the headband has electronic functions associated therewith, expanding the use range of the headband.

Abstract: Optical transceivers with optical packaging designs to reduce inside transceiver components, simplify the fabrication, and improve the optical alignment and other optical transceiver characteristics.

Abstract: A smart zipper includes: a fastener stringer including two rows of zipper teeth and a joint at one end of the two rows of zipper teeth for fixedly connecting the one end of the two rows of zipper teeth; a slider, including two lateral limiting portions, the two lateral limiting portions having conductive properties, and the two lateral limiting portions respectively electrically contacting outer edges of the two rows of zipper teeth; and a resistance measuring chip electrically connected to the two lateral limiting portions of the slider respectively, wherein the resistance measuring chip, the slider and the fastener stringer form a conductive loop. The resistance measuring chip is used for measuring the resistance value of the conductive loop, and outputting a measurement signal. The smart zipper provided by the present disclosure can detect its own closed state. Therefore, the user can know the closed state of the zipper in real time to avoid embarrassment or property loss due to unclosed zipper.

Abstract: A method and apparatus for verifying code integrity on a client, the method comprising: determining a verification object on the client; generating a plurality of verification sequences, wherein each verification sequence comprises a memory access mode, and a verification algorithm; randomly selecting a verification sequence from the plurality of verification sequences, and obtaining a server verification result for the verification object in accordance with the selected verification sequence; sending the selected verification sequence to the client; receiving a client verification result for the verification object calculated by the client in accordance with the selected verification sequence; and comparing the server verification result with the client verification result to obtain a code verification result.

Abstract: A parking lock apparatus, a parking lock system and a method for controlling the same are provided. The method includes: identifying identity information of a to-be-parked vehicle, sending an unlocking command to a parking lock according to the identified identity information and enabling the parking lock to be unlocked according to the unlocking command.

Abstract: An image display device and image display method. The image display device includes: a plurality of display screens spliced together, a corresponding gravity sensor integrated in each display screen, a logic circuit electrically connected with each display screen and each gravity sensor respectively, and a memory electrically connected with the logic circuit. The gravity sensor determines a placing direction of a corresponding display screen. The logic circuit automatically adjusts an access sequence of the image information in the memory according to the placing directions of the display screens determined by the gravity sensors, and outputs the accessed image information to the corresponding display screens, so that the image display device can normally display images when the display screens are placed right way up and/or placed up side down.

Abstract: An earphone, an earphone control method and device are provided, the earphone control device includes an echo collection module, a state determination module and a control module, where the echo collection module includes at least one acoustic sensor, which is arranged in a space defined by an earphone and an ear canal, when the earphone is worn, for collecting a sound in the space, where the echo collection module is configured to collect the sound, convert the sound into a first audio signal, and output the first audio signal to the state determination module; the state determination module is configured to determine a wearing state of the earphone according to the first audio signal; and the control module is configured to perform playing control according to the wearing state of the earphone.