Abstract: The invention provides a method for evaluating deep-buried tunnel blasting parameters, and belongs to the technical field of mine engineering. The method comprises: setting multiple diverse blasting schemes; selecting a plurality of test sections with the same geological characteristics, the number of the test sections corresponding to the number of the blasting schemes; blasting the test sections using the blasting schemes, and obtaining diversified monitoring data of each test section; and comparing the diversified monitoring data to select the optimal blasting schemes for the test sections. According to the method for evaluating the deep-buried tunnel blasting parameters, by implementing different blasting schemes in test sections with the same geological characteristics, diversified monitoring data of the test sections are obtained and compared to select the optimal blasting schemes for the test sections, so as to ensure the safety and quality of blasting excavation of deep-buried tunnels.

Abstract: A startup control circuit includes a direct current (DC) conversion circuit, a main control unit, a first switch circuit and a second switch circuit. The first switch circuit is connected to the battery pack and the DC conversion circuit. The second switch circuit is connected to a battery pack, the DC conversion circuit, and a main control unit. The first switch circuit is configured to activate the DC conversion circuit to supply power to the second switch circuit and the main control unit after the first switch circuit is triggered. The second switch circuit outputs different voltage waveforms based on different timing sequences of currents flowing from the battery pack and the DC conversion circuit to the second switch circuit. The main control unit is configured to output a first drive command when receiving a first voltage waveform.

Abstract: The present disclosure relates to a polypeptide analog or a derivative thereof, and a preparation method and use thereof, and particularly to an agonistic polypeptide analog or a derivative thereof of an insulin amyloid polypeptide receptor. The polypeptide analog or the derivative thereof provided by the present disclosure has good agonistic activity on the insulin amyloid polypeptide receptor, has the characteristics of good stability, high activity, etc, at the same time, and can be used for treating and preventing diseases related to the insulin amyloid polypeptide receptor, such as body weight abnormality, especially obesity and overweight.

Abstract: Provided is a high pressure water jet cutting apparatus for a rock-wall crane girder in an underground cavern powerhouse, comprising: a guiding mechanism, a support mechanism, and a jet cutting mechanism, where the guiding mechanism is detachably connected to a steel tube frame, the steel tube frame is erected according to drilling positions, and the support mechanism is connected to the guiding mechanism and is capable of moving on the guiding mechanism; and the support mechanism is connected to the jet cutting mechanism, the support mechanism is configured to adjust an angle of a hollow jet pipeline protection tube of the jet cutting mechanism, a tail end of the hollow jet pipeline protection tube is connected with a nozzle, and the steel tube frame is connected to a positioning steel tube through which the hollow jet pipeline protection tube passes.

Abstract: The present invention relates to Ni-rich Li-rich positive electrode active material doped with high-valence transition metal ions, such as Mo, exhibiting high capacity and excellent cycling stability.

Abstract: The disclosure provides a power tool and power tool system, including: a first slot and a second slot; when the power tool is in a double-pack working state, battery packs are respectively arranged in the first slot and the second lot; when the power tool is in a single-pack working state, the battery pack is arranged in the first slot or the second slot, and both the double-pack working state and the single-pack working state provides a same rated voltage to the power tool

Abstract: A simulating and testing platform system for laser-mechanical combined efficient drilling and rock breaking, comprising a laser-mechanical combined drilling tool being fixed on a position adjusting device through a drilling tool carrying device to achieve adjustment of a drill hole space and a relative angle, a driving device configured to drive the drilling tool to rotate and advance to achieve a rock breaking function, and a confining pressure loading device configured to perform confining pressure loading of a sample to simulate a real terrestrial stress environment. Wherein, the position adjusting device achieves all-around and multi-angle continuous drilling; the confining pressure loading device simulates the real terrestrial stress environment to increase the combined rock breaking efficiency in a manner of biasing laser.

Abstract: The present disclosure relates to a polypeptide analog or a derivative thereof, and a preparation method and use thereof, and particularly to an agonistic polypeptide analog or a derivative thereof of an insulin amyloid polypeptide receptor. The polypeptide analog or the derivative thereof provided by the present disclosure has good agonistic activity on the insulin amyloid polypeptide receptor, has the characteristics of good stability, high activity, etc. at the same time, and can be used for treating and preventing diseases related to the insulin amyloid polypeptide receptor, such as body weight abnormality, especially obesity and overweight.

Abstract: A multi-dimensional integrated monitoring system and method for underground engineering. The system includes point monitoring modules mounted on a plurality of first monitoring sections, linear monitoring modules mounted on a plurality of second monitoring sections, a planar monitoring module mounted on a tunnel face, and volumetric monitoring modules mounted on a plurality of third monitoring sections of the underground engineering; and a data analysis platform for receiving and analyzing first feature information collected by the point monitoring modules, second feature information collected by the linear monitoring modules, third feature information collected by the planar monitoring module, and fourth feature information collected by the volumetric monitoring modules. By means of the system, the problems that a unified system with mutual coupling of monitoring methods is not formed in the underground engineering, and the overall condition of the engineering cannot be fully reflected are solved.

Abstract: The present disclosure provides a method and system for automatically monitoring and identifying water seepage of a segment joint of a subway shield tunnel. The method includes: 1): grinding a water-sensitive material and then mixing with a waterproof material to form a color-developing agent; 2): coating the color-developing agent on two sides extending from a construction joint and/or a deformation joint of a tunnel lining as a center line, to form a color-developing layer; and 3) obtaining a color development feature of the color-developing layer, and identifying water seepage based on the color development feature. According to the present disclosure, a water seepage amount can be determined based on the color development feature of the color-developing layer around the construction joint and/or the deformation joint of the tunnel lining, which facilitates monitoring of the water seepage amount around the construction joint and/or the deformation joint.

Abstract: A flexible circuit base board and a flexible flat cable are provided. The flexible flat cable includes the flexible circuit base board and a transmission element. The flexible circuit base board includes a base film, multiple conductive wires, a transmission signal pad, a conductive structure, a collecting signal pad and a cover film. The conductive wires are spaced and placed on the base film. The transmission signal pad and the collecting signal pad are electrically connected to and are disposed on the base film. The conductive structure is disposed on the base film, and is electrically connected to at least one of the conductive wires and the transmission signal pad. The cover film is disposed on the base film, and covers the conductive wires, the conductive structure, the transmission signal pad, and the collecting signal pad. The transmission element is electrically connected to the collecting signal pad.

Abstract: The disclosure provides a power tool and power tool system, including: a first slot and a second slot; when the power tool is in a double-pack working state, battery packs are respectively arranged in the first slot and the second lot; when the power tool is in a single-pack working state, the battery pack is arranged in the first slot or the second slot, and both the double-pack working state and the single-pack working state provides a same rated voltage to the power tool.

Abstract: The invention discloses a tunnel boring machine (TBM) equipped with a high-pressure water jet cutting system and a combined tunneling method, comprising a TBM body, the water pump unit on the body, and the high-pressure water jet cutting system at the front end of the body. The high-pressure water jet cutting system comprises a water jet-mechanical combined cutter head, water jet-shell knife combined cutters, a high-pressure water pipeline, a multi-medium rotary center, and a water jet diversion valve block. The high-pressure water at the pump unit is transmitted to the multi-medium rotary center through the high-pressure water conveying pipeline, and then divided into multiple paths by the water jet diverter valve block, and respectively supplied to each of the combined cutters on the water jet-mechanical combined cutter head. This invention offers practical suggestions and references for the overall design, and spatial arrangement of the high-pressure water jet cutting system.

Abstract: A multilayered flexible flat cable includes at least two cable units. Each of the cable units includes a plurality of wires, two insulating films, a plurality of detecting elements, a plurality of crimping terminals and a plurality of cut-off holes. The wires are arranged in parallel between the two insulating films. The detecting elements are respectively electrically connected to the wires. The crimping terminals are respectively crimped to the wires, and the crimping terminals are respectively electrically connected to the wires. The cut-off holes are respectively extended through one of the two insulating films and the wires. One of the two insulating films of one of the cable units is attached to one of the two insulating films of another one of the cable units.

Abstract: A system for mining mobile emergency communication includes: a management platform, a transmission network, a repeater and a terminal. The terminal is configured to collect and generate communication data, and to send the communication data to the repeater; the repeater is connected with the transmission network and/or connected with another repeater in a wireless way for building a transmission link, the transmission link transmitting the communication data sent by the terminal based on a preset rule; the management platform is configured to monitor and schedule the transmission link, and to schedule the communication data; and the transmission network is configured to connect the repeater and the management platform, and to transmit the communication data and link regulation and control data.

Abstract: The disclosure presents a mining converged communication system. The system includes a first converged communication device and a plurality of service devices. The first converged communication device is configured to receive a first data packet from a first service device that initiates a service request in the plurality of service devices, determine a first target service device that receives the service request in the plurality of service devices, based on the first data packet, and send the first data packet to the first target service device. The first service device in the plurality of service devices includes any service device set on or under a mine, and the first target service device includes at least one service device set on and/or under the mine.

Abstract: The present invention provides a method for designing an abrasive water jet-disc cutter combined rock-breaking cutter head, a system therefor, a cutter head and a tunnel boring machine (TBM), wherein the key technology of designing the abrasive water jet-disc cutter combined rock-breaking cutter head of the TBM are provided from the aspects of determining a combined rock-breaking combination mode, configuration of cutter operation parameters and optimization of the combined cutter head; the performance of the abrasive water jet-disc cutter combined rock-breaking cutter head manufactured according to the optimized layout parameters is improved; and a new idea is provided for the development and application of a full-section rock tunneling machine in the field of underground engineering.

Abstract: The present invention relates to Li-rich positive electrode active material comprising a layered structure and a disordered rock-salt structure exhibiting high capacity and excellent cycling stability.

Abstract: In some aspects, the present disclosure provides a method comprising: (a) selectively enriching a first plurality of biomolecule types in a first fluid composition; (b) selectively enriching a second plurality of biomolecule types in a second fluid composition; and (c) performing a downstream assay on biomolecule types of the first plurality of biomolecule types and the second plurality of biomolecule types, wherein the first fluid composition comprises a first pH, and the second fluid composition comprises a second pH, wherein the first pH and the second pH are different or the same. Also disclosed are systems, kits, compositions, and computer-readable media for performing biomolecule assays.

Abstract: This disclosure describes a database backup method and apparatus, and a computing device cluster. In embodiments, a first corrupted-page inspection operation is performed on a first page in a data table of a database, to determine a first inspection result, where the first is used to record metadata of the data table; the first page is backed up when the first inspection result indicates that the first page is a normal page; a second corrupted-page inspection operation is performed on a second page in the data table based on the first page, to determine a second inspection result, where the second is used to record data in the data table; and the second page is backed up when the second inspection result indicates that the second page is a corrupted page.