Abstract: A (methyl)acrolein oxidation catalyst and a preparation method therefor-in which the catalyst has a composition represented by the following formula: x(Mo12PaCsbVcDeOf)+tC/yZ in which Mo12PaCSbVcDeOf is a heteropolyacid salt main catalyst; C is a nano carbon fiber additive, and Z is a carrier thermal conduction diluent; Mo, P, Cs, V, and O represent the elements of molybdenum, phosphorus, cesium, vanadium, and oxygen, respectively; D represents at least one element selected from the group consisting of copper, iron, magnesium, manganese, antimony, zinc, tungsten, silicon, nickel, and palladium; a, b, c, e, and f represent the atomic ratio of each element, a=0.1-3, b=0.01-3, c=0.01-5, e=0.01-2, and f being the atomic ratio of oxygen required to satisfy the valence of each of the described components; x and y represent the weights of the main catalyst and the carrier thermal conduction diluent Z, and y/x=11.1-50%; and t represents the weight of the nano carbon fiber, and t/x=3-10%.

Abstract: Disclosed is a charging station capable of realizing mutual capacity aid, which comprises a plurality of charging units, a power bus and a mutual capacity aid bus. Each charging unit is powered by the power bus, and each charging unit provides mutual aid capacity for another charging unit through the mutual capacity aid bus or receives mutual aid capacity from other charging units through the mutual capacity aid bus. The charging station can realize rapid charging of electric vehicles, and can also realize mutual capacity aid.

Abstract: A system and method for detecting a flicker frequency, and electronic device including the system are provided. The system includes an optical sensor, a sequence generator, a first and a second computing circuit. The optical sensor converts an incident light into a digital sequence according to a sampling frequency, which is greater than at least twice the flicker frequency. The sequence generator generates a first reference sequence and a second reference sequence that is delayed by a period from the first reference sequence, which are periodic according to the flicker frequency and the sampling frequency. The first computing circuit computes a first and a second correlation coefficient. The second computing circuit computes a detection score that indicates a probability of existence of the flicker frequency according to the first and the second correlation coefficient.

Abstract: The present application discloses a method for preparing optical metasurfaces, wherein the method is performed based on nano-imprinting, and the template used in the method is an imprinting template with patterns of meta-atoms. The method for preparing optical metasurfaces provided by the present application can replace the electron beam lithography method used in fabricating meta-atoms, greatly reducing the costs, and greatly reducing the production time. The method provided by the present application significantly improves the production cost and the production time, achieving a low-cost, large-scale fabrication of metasurface-based optical elements within a short time, and having good industrialization prospects.

Abstract: Techniques for transforming character delimited values are presented herein. An input module is configured to read a set of character delimited values. A generation module is configured to generate a synchronization block for the set of values that includes a value selected from a byte size of the associated value and may be a flag representing a predetermined value. An output module is configured to output the synchronization block and the set of values to a binary data output stream for output in a device dependent byte order according to the respective byte sizes of the values in the set of values.

Abstract: Techniques for transforming character delimited values are presented herein. An input module is configured to read a set of character delimited values. A generation module is configured to generate a synchronization block for the set of values that includes a value selected from a byte size of the associated value and may be a flag representing a predetermined value. An output module is configured to output the synchronization block and the set of values to a binary data output stream for output in a device dependent byte order according to the respective byte sizes of the values in the set of values.

Abstract: Techniques for transforming character delimited values are presented herein. An input module may be configured to read a set of character delimited values. A generation module may be configured to generate, in real-time, a synchronization block for the set of values that includes a nibble for each value in the set of values. The nibbles may represent either a byte size of the associated value or may be a flag representing a predetermined value. An output module may be configured to sequentially output the synchronization block and the set of values to a binary data output stream for output in a device dependent byte order according to the respective byte sizes of the values in the set of values.

Abstract: Techniques for transforming character delimited values are presented herein. An input module may be configured to read a set of character delimited values. A generation module may be configured to generate, in real-time, a synchronization block for the set of values that includes a nibble for each value in the set of values. The nibbles may represent either a byte size of the associated value or may be a flag representing a predetermined value. An output module may be configured to sequentially output the synchronization block and the set of values to a binary data output stream for output in a device dependent byte order according to the respective byte sizes of the values in the set of values.

Abstract: A system and method for a catalog item virtual fulfillment center is described. The system determines whether an item from a search query on an online marketplace corresponds to a catalog item. The catalog item corresponds to an item sold at substantially the same price among different sellers of the online marketplace. A display of a menu of different shipping times and corresponding total costs is generated for the catalog item.