Abstract: Some users of a data management system (DMS) may use multiple computing environments to replicate and store virtual machines (VM)s, such as for backup and recovery purposes. For example, different replication environments may include one or more private data centers, one or more cloud environments or any combination thereof. A user may schedule a failover procedure for an application. A DMS may perform a failover procedure that reduces downtime and eliminates data loss. The DMS may capture and replicate a snapshot of a VM running on a source computing environment to a target computing environment, power down the VM on the source computing environment, capture and replicate a second snapshot of the VM to the target computing environment, and power on the VM at the target computing environment. As the additional snapshot includes a relatively small amount of data replication at the target computing environment may proceed quickly, reducing downtime.

Abstract: A heat storage and heat release system for molten salt with steam heating is provided. The heat storage and heat release system for molten salt with steam heating includes a low-temperature molten salt tank, a high-temperature molten salt tank, molten salt pumps, a boiler barrel, a fixed tube-plate heat exchanger and a drum. The boiler barrel, the fixed tube-plate heat exchanger and the drum are arranged from high to low and are respectively. At least one molten salt outlet pipe and at least one molten salt returning pipe from the low-temperature molten salt tank are connected with the tube pass of the fixed tube-plate heat exchanger. At least one molten salt outlet pipe and at least one molten salt returning pipe from the high-temperature molten salt tank are connected with the tube pass of the fixed tube-plate heat exchanger.

Abstract: The present invention discloses DFB laser manufacturing method based on dielectric laterally coupled grating with deterministic grating coupling coefficient, comprising: S1: performing photolithography on an epitaxial substrate of the laser without an etch-stop layer to obtain a photoresist pattern with a waveguide morphology in a predetermined geometric configuration, and then performing dry etching and removing the photoresist to obtain a substrate of a waveguide structure in the predetermined geometric configuration; S2: depositing a layer of an insulating film with a low refractive index on the substrate; S3: depositing a dielectric film with a high refractive index on the insulating film; S4: performing photolithography on the dielectric film to prepare a photoresist pattern as a laterally coupled grating morphology; S5: performing etching and removing the photoresist for the dielectric film on the photoresist pattern to prepare a dielectric laterally coupled grating for the laser, and to further prepare

Abstract: The present invention relates to a ground double-hole combined water inrush prevention method for overlying strata movement monitoring and bed separation water drainage. By arranging a rock strata movement monitoring borehole and a bed separation water drainage borehole, interior movement information of an overlying stratum and bed separation generation timing fed back by strata movement monitoring performed inside are monitored; work on the bed separation water drainage borehole is guided by monitoring changes in arranged monitoring points; and through combination of the movement monitoring borehole and the bed separation water drainage borehole, the utilization rate of the bed separation water drainage borehole is effectively increased.

Abstract: The present invention relates to a ground double-hole combined water inrush prevention method for overlying strata movement monitoring and bed separation water drainage. By arranging a rock strata movement monitoring borehole and a bed separation water drainage borehole, interior movement information of an overlying stratum and bed separation generation timing fed back by strata movement monitoring performed inside are monitored; work on the bed separation water drainage borehole is guided by monitoring changes in arranged monitoring points; and through combination of the movement monitoring borehole and the bed separation water drainage borehole, the utilization rate of the bed separation water drainage borehole is effectively increased.

Abstract: Methods, systems, and storage media for dynamically modifying ads at point of display based on target user are disclosed. Exemplary implementations may: receive a plurality of visual content items; receive information indicative of a user preference associated with a user device; determine a type of visual content item to deliver to a plurality of user devices; determine, based on the type of visual content item and the information indicative of the user preference, a subset of visual content items of the plurality of visual content items; select, for the user device, a visual content item from the subset of visual content items; modify, based on the information indicative of the user preference, a graphical quality of the visual content item to output a modified graphical quality; and send the visual content item with the modified graphical quality to the user device.

Abstract: A multimerization delivery system that can be used to deliver a cargo molecule intracellularly. The multimerization delivery system can achieve high-efficiency endocytosis of a cargo molecule and high-efficiency release thereof from an endocytic vesicle, significantly improving the cytoplasmic delivery efficiency of the cargo molecule. Once the cargo molecule is available in the cytoplasm, the cargo molecule can play any role related thereto. The multimerization delivery system provides an effective means for affecting the biological mechanisms and pathways of cells, and can be used in various fields such as research, treatment, and diagnosis.

Abstract: A method is disclosed of fabricating all-dielectric flat lens with low refractive index comprising: selecting dielectric substrate material and lens structure material; determining incident wavelength; calculating phase modulation corresponding to each pillar unit; periodically sampling circular area of dielectric substrate with radius to obtain plurality of sampling points; calculating phase modulation required at position of each sampling point; obtaining pillar corresponding to each sampling point; arranging different dielectric pillars with low refractive index and same thickness are arranged on dielectric substrate, thereby obtaining all dielectric flat lens with low refractive index.

Abstract: A fusion protein and a complex containing same, capable of being used for the intracellular delivery of cargo molecules. The fusion protein and complex can implement the efficient release of cargo molecules from endocytic vesicles, thereby significantly improving the cytoplasmic delivery efficiency of the cargo molecules. One cargo molecules can be obtained in cytoplasms, they can exert any function related thereto. The fusion protein and complex provide effective means for affecting biological mechanisms and pathways of cells, and can be used in various fields such as research, treatment, and diagnosis.

Abstract: The present invention discloses a gate drive circuit for reducing a reverse recovery current of a power device, and belongs to the field of basic electronic circuit technologies. The gate drive circuit includes a high-voltage LDMOS transistor, a diode forming a freewheeling path when the diode is turned on or a low-voltage MOS transistor in anti-parallel connection with a body diode, and a voltage detection circuit.

Abstract: The present invention discloses a gate drive circuit for reducing a reverse recovery current of a power device, and belongs to the field of basic electronic circuit technologies. The gate drive circuit includes a high-voltage LDMOS transistor, a diode forming a freewheeling path when the diode is turned on or a low-voltage MOS transistor in anti-parallel connection with a body diode, and a voltage detection circuit.

Abstract: The invention discloses a method and system for measuring orbital angular momentum modes of photons based on spiral transformation. A phase plate located in an input plane transforms the incident beam along a spiral path in the input plane into a straight line in an output plane and a phase plate located in the output plane compensate the phase accumulated when the beam propagates from the input plane to the output plane during the above transformation process, thereby realizing that the orbital angular momentum modes of photons to be measured in the input plane are transformed into plane wave modes with specific tilted wavefronts in the output plane. The plane wave modes with different tilted wavefronts can be focused on different positions on the focal plane and thus realize one-to-one mapping and detection between orbital angular momentum modes of photons and spatial locations.

Abstract: The present invention relates to a construction method of a mode-division multiplexing fiber-optic communication system, which includes following contents: converting multiple-input optical signals into optical propagation modes supported by a graded-index ring-core optical fiber at a transmitting end, after being multiplexed by a mode multiplexer, injecting the optical signals into the graded-index ring-core optical fiber for transmission; using a mode de-multiplexer to separate optical signals of different mode groups at a receiving end firstly; and for the separation of internal modes of the same mode group, adopting a multi-channel reception and a digital signal processing method based on a multiple-input multiple-output equalization for processing: for the separation of modes in a base mode group and a high-order mode group, using a digital signal processing algorithm including a 2×2 multiple-input multiple-output equalization and a digital signal processing algorithm including a 4×4 multiple-input multi

Abstract: The invention discloses a method and system for measuring orbital angular momentum modes of photons based on spiral transformation. A phase plate located in an input plane transforms the incident beam along a spiral path in the input plane into a straight line in an output plane and a phase plate located in the output plane compensate the phase accumulated when the beam propagates from the input plane to the output plane during the above transformation process, thereby realizing that the orbital angular momentum modes of photons to be measured in the input plane are transformed into plane wave modes with specific tilted wavefronts in the output plane. The plane wave modes with different tilted wavefronts can be focused on different positions on the focal plane and thus realize one-to-one mapping and detection between orbital angular momentum modes of photons and spatial locations.

Abstract: A method is disclosed of fabricating all-dielectric flat lens with low refractive index comprising: selecting dielectric substrate material and lens structure material; determining incident wavelength; calculating phase modulation corresponding to each pillar unit; periodically sampling circular area of dielectric substrate with radius to obtain plurality of sampling points; calculating phase modulation required at position each sampling point; obtaining pillar corresponding to each sampling point; arranging different dielectric pillars with low refractive index and same thickness are arranged on dielectric substrate, thereby obtaining all dielectric flat lens with low refractive index.

Abstract: The present invention relates to a construction method of a mode-division multiplexing fiber-optic communication system, which includes following contents: converting multiple-input optical signals into optical propagation modes supported by a graded-index ring-core optical fiber at a transmitting end, after being multiplexed by a mode multiplexer, injecting the optical signals into the graded-index ring-core optical fiber for transmission; using a mode de-multiplexer to separate optical signals of different mode groups at a receiving end firstly; and for the separation of internal modes of the same mode group, adopting a multi-channel reception and a digital signal processing method based on a multiple-input multiple-output equalization for processing: for the separation of modes in a base mode group and a high-order mode group, using a digital signal processing algorithm including a 2×2 multiple-input multiple-output equalization and a digital signal processing algorithm including a 4×4 multiple-input multi

Abstract: The invention relates to methods, devices, systems and uses of such systems for the generation and detection of electromagnetic fields carrying orbital angular momentum. An electromagnetic wave placed in a resonator having a closed-loop waveguide supporting a guided wave propagating at resonance with angular order, p, and with an angular grating patterned in the closed-loop waveguide, the angular grating having a integer number, q, of grating elements. The angular grating selectively couples the guided wave mode to a free space radiation mode having an OAM quantity, l, and out-of-plane wave vector component, krad,z, and wherein significant coupling to the grating occurs only when the following wave matching condition is satisfied: l=p?mq where: m is the diffraction order of the angular grating, m=1, 2, 3, . . . ,.

Abstract: The invention relates to methods, devices, systems and uses of such systems for the generation and detection of electromagnetic fields carrying orbital angular momentum. An electromagnetic wave placed in a resonator having a closed-loop waveguide supporting a guided wave propagating at resonance with angular order, p, and with an angular grating patterned in the closed-loop waveguide, the angular grating having a integer number, q, of grating elements. The angular grating selectively couples the guided wave mode to a free space radiation mode having an OAM quantity, l, and out-of-plane wave vector component, krad,z, and wherein significant coupling to the grating occurs only when the following wave matching condition is satisfied: l=p?mq where: m is the diffraction order of the angular grating, m=1, 2, 3, . . . ,.

Abstract: A tunable lasing device (100) comprising a ring-shaped laser cavity (102), an optical gain element (104), a bi-directional output coupler (106) and a frequency selection means (114). The frequency selection means is generally a grating with a refractive index that determines a grating reflection frequency. Single mode laser operation is achieved where a cavity mode frequency of the ring-shaped laser cavity coincides with a grating reflection frequency. The refractive index of the grating can be modified by the injection of a variable current. In this way, the lasing frequency can be rapidly tuned between cavity mode frequencies.

Abstract: A tunable lasing device (100) comprising a ring-shaped laser cavity (102), an optical gain element (104), a bi-directional output coupler (106) and a frequency selection means (114). The frequency selection means is generally a grating with a refractive index that determines a grating reflection frequency. Single mode laser operation is achieved where a cavity mode frequency of the ring-shaped laser cavity coincides with a grating reflection frequency. The refractive index of the grating can be modified by the injection of a variable current. In this way, the lasing frequency can be rapidly tuned between cavity mode frequencies.