Abstract: The present application discloses a superconducting quantum chip preparation method and a superconducting quantum chip, and is applied to the technical field of quantum chips. The method includes the steps: arranging a separation layer on the surface of a first substrate; arranging an air bridge on the surface of the separation layer; the bridge surface of the air bridge is attached to the separation layer, and the bridge pier of the air bridge extends from the separation layer to the direction opposite to one side of the first substrate; electrically connecting the air bridge and the circuit device which are aligned with each other; after the air bridge and the circuit device are electrically connected with each other, separating the first substrate and the air bridge from each other through the separation layer, such that the superconducting quantum chip is manufactured.

Abstract: A solution that can reduce impact of multipath interference (MPI) in an optical fiber system on a transmitted signal in a low-cost manner. The method includes: a sending device sends, to a receiving device, a transmitted signal generated by the sending device based on pulse amplitude modulation-N, where strength distribution of the transmitted signal includes N strength values, the N strength values correspond to N?1 strength differences, a strength difference corresponding to a high strength value in the N strength values is greater than a strength difference corresponding to a low strength value, and the transmitted signal may be an optical signal, or may be an electrical signal. A strength distribution rule of the transmitted signal is changed, so that the strength difference corresponding to the high strength value is greater than the strength difference corresponding to the low strength value.

Abstract: An optical waveguide device and an optical network are provided and relate to the field of optical communication technologies. The optical waveguide device and optical network perform dispersion compensation on dispersion generated in transmission of a transmission signal in a fiber. The optical waveguide device includes a first waveguide having an input end and an output end. A first grating is disposed between the input end and the output end of the first waveguide. The first grating includes a plurality of grating combs periodically distributed in an extension direction of the first waveguide. A grating parameter of the first grating presents chirp distribution. The grating parameter includes one or more of the following: a periodicity of the grating comb and a size of the grating comb.

Abstract: The application relates to a method and a system for accelerating a recurrent neural network based on a Cortex-M processor, and a medium. The method comprises: setting MCR instructions and a CDP instruction according to common basic operators of the recurrent neural network, the common basic operators comprising a matrix multiplication operator, a vector arithmetic operator, a sigmoid activation operator, a tanh activation operator and a quantization operator; configuring an internal register of a recurrent neural network coprocessor through the MCR instructions; and enabling the common basic operators of the recurrent neural network through the CDP instruction on the basis of the configured internal register.

Abstract: Disclosed is a polycyclic azide desulfurizer, including the following raw materials in parts by mass: 20-35 parts of an alcohol amine, 20-35 parts of an amide, and an aldehyde, which is 10-15 parts of a small-molecule aldehyde or 20-35 parts of a polyaldehyde. Also disclosed is a method for synthesis of the polycyclic azide desulfurizer, including: mixing an alcohol amine with an amide and stirring, heating, adding a catalyst I dropwise, and performing reaction to obtain a monocyclic triazine, heating the monocyclic triazine, mixing with a polyaldehyde and stirring, adding a catalyst II dropwise, and performing coupling while stirring; alternatively, mixing a small-molecule aldehyde with an amide and stirring, heating, adding a catalyst I dropwise, and performing reaction, adding an alcohol amine, adding a catalyst II dropwise, and performing coupling while stirring; and separating a by-product from a product obtained after the coupling out, and purifying the product.

Abstract: The application relates to a method and a system for accelerating a recurrent neural network based on a Cortex-M processor, and a medium. The method includes: setting a MCR instruction and a CDP instruction according to common basic operators of the recurrent neural network, the common basic operators including a matrix multiplication operator, a vector arithmetic operator, a Sigmoid activation operator, a Tan h activation operator and a quantization operator; configuring an internal register of a recurrent neural network coprocessor through the MCR instruction; and enabling the common basic operators of the recurrent neural network through the CDP instruction on the basis of the configured internal register.

Abstract: A method for preparing an electrode material includes: a) producing a microspherical precursor by way of co-precipitation; b) forming an intermediate product by calcining the precursor with a stoichiometric amount of sodium carbonate, lithium carbonate and a structural stabilizer; and c) performing an ion exchange process to the intermediate product under molten LiNO3/LiCl to form a lumpy residue. An electrode for lithium-ion battery includes an electrode material having a general formula of Li[Li1/3(TMxAly)]O2, and lithium-ion battery comprising an electrode such as a cathode having the above electrode material are also addressed.

Abstract: A process for enzymolysis of chicken includes the follow steps: Step 1, processing chicken into small pieces, transferring the small pieces into a reaction kettle, adding water and preheating; Step 2, stirring the chicken preheated in step 1, raising a temperature to 40 to 60° C., adding protease to perform enzymolysis; and Step 3, heating an enzymatic hydrolysate obtained in step 2 to 85 to 100° C., holding the temperature, and terminating the enzymolysis reaction. The protease is a composite flavourzyme including exo-protease produced by fermentation of Aspergillus oryzae and endo-protease produced by fermentation of Bacillus subtilis.

Abstract: The application relates to a convolutional neural network acceleration method and system based on a Cortex-M processor, and a medium. The method comprises: setting a MCR instruction and a CDP instruction according to common basic operators of a convolutional neural network, the common basic operators comprising a convolution operator, a Relu activation operator, a pooling operator, a table look-up operator and a quantization operator; and configuring an internal register of a convolutional neural network coprocessor through the MCR instruction, and then enabling the common basic operators of the convolutional neural network through the CDP instruction. Through the application, problems of inefficiency, high cost and inflexibility of a cyclic neural network algorithm in the execution of a processor are solved, and the basic operators needed for the cyclic neural network to be executed through a coprocessor instruction set are realized.

Abstract: Methods and devices that provide a variable-bandwidth optical filter with frequency tuning are disclosed. A universal variable bandwidth optical filter architecture is disclosed, based on microring resonators that can vary both operation wavelength and bandwidth with no extra complexity relative to conventional wavelength tunable filters. The filter architecture provides a universal filter design for any arbitrary shape of filter response, such as second-order, fourth-order, sixth-order, and so on. The filter characteristics—insertion loss, in-band ripple, and out-of-band rejection level—may be maintained over the bandwidth tuning range. There is no need for extra heaters to tune the filter's operating bandwidth, as the same heaters used to tune the filter frequency can be used to tune filter bandwidth. The device can be used as an add/drop filter.

Abstract: Methods and devices that provide a variable-bandwidth optical filter with frequency tuning are disclosed. A universal variable bandwidth optical filter architecture is disclosed, based on microring resonators that can vary both operation wavelength and bandwidth with no extra complexity relative to conventional wavelength tunable filters. The filter architecture provides a universal filter design for any arbitrary shape of filter response, such as second-order, fourth-order, sixth-order, and so on. The filter characteristics—insertion loss, in-band ripple, and out-of-band rejection level—may be maintained over the bandwidth tuning range. There is no need for extra heaters to tune the filter's operating bandwidth, as the same heaters used to tune the filter frequency can be used to tune filter bandwidth. The device can be used as an add/drop filter.

Abstract: A method and an apparatus for determining a structured query language (SQL) execution plan are provided to optimize determining of the SQL execution plan and improve execution efficiency of the SQL execution plan. The SQL execution plan corresponds to at least one relation table. During an Nth iteration, the method includes obtaining a first iteration parameter generated after a first plan tree is executed on the at least one relation table during an (N?1)th iteration, where N is a natural number greater than 1, establishing a second plan tree according to the first iteration parameter, and determining the first plan tree or the second plan tree as the SQL execution plan when a difference between the second plan tree and the first plan tree is not greater than a first threshold.

Abstract: A method and an apparatus for determining a structured query language (SQL) execution plan are provided to optimize determining of the SQL execution plan and improve execution efficiency of the SQL execution plan. The SQL execution plan corresponds to at least one relation table. During an Nth iteration, the method includes obtaining a first iteration parameter generated after a first plan tree is executed on the at least one relation table during an (N?1)th iteration, where N is a natural number greater than 1, establishing a second plan tree according to the first iteration parameter, and determining the first plan tree or the second plan tree as the SQL execution plan when a difference between the second plan tree and the first plan tree is not greater than a first threshold.