Abstract: The present disclosure provides a gene combination for expressing and producing terrequinone A in Escherichia coli and use thereof. The gene combination includes a tdiAS gene, a tdiBS gene, a tdiCS gene, a tdiDS gene, a tdiES gene, an sfpS gene, an ScCKS gene, and an AtIPKS gene with nucleotide sequences set forth in SEQ ID NOS:1 to 8. In the present disclosure, a recombinant engineered strain capable of producing terrequinone A having anti-cancer activity is obtained by separately constructing recombinant plasmids pC02 and pU03 through the eight genes and transforming the two recombinant plasmids into E. coli. The content of terrequinone A in a fermentation broth thereof is 106.3 mg/L, which has potential application value in the biopharmaceutical field.

Abstract: The present disclosure provides a herbicide composition and a preparation method and an application method thereof, and relates to the technical field of herbicides. The herbicide composition includes pinoxaden and a cyclic lactone compound. The cyclic lactone compound is five-membered cyclic lactone and/or six-membered cyclic lactone. The herbicide composition solves the technical problems of poor chemical stability and precipitation due to crystallization at low temperature of existing pinoxaden emulsifiable concentrate formulations. In the herbicide composition, the cyclic lactone compound is used in combination with the pinoxaden, such that not only the solubility of the pinoxaden is improved, but also a chemical stabilization effect of the pinoxaden is effectively improved, and the problems of precipitation due to crystallization at low temperature and chemical stability of the pinoxaden emulsifiable concentrate formulations are solved.

Abstract: Provided is a chimeric antigen receptor, comprising an antigen binding region, a transmembrane domain and an intracellular signaling region. The antigen binding region comprises an antibody specifically targeting CD7, and the intracellular signaling region consists of a co-stimulatory domain, a primary signal transduction domain, and a ?C chain or intracellular region thereof. Also provided are an engineered immune cell comprising the chimeric antigen receptor and a pharmaceutical composition thereof, and use of the engineered immune cell/pharmaceutical composition for treating cancers.

Abstract: Embodiments of this application provide a channel estimation method and apparatus, and relate to the field of communications technologies, to help reduce indication overheads. The method includes: generating and sending indication information, wherein the indication information is used to indicate M N-dimensional precoding vectors, each precoding vector is applied to one of M frequency bands, the M N-dimensional precoding vectors form a space-frequency matrix, and the space-frequency matrix is generated by performing weighted combination on a plurality of space-frequency component matrices, wherein the space-frequency matrix is an M×N-dimensional space-frequency vector or an X×Y space-frequency matrix, X and Y are one and the other of M and N, M?1, N?2, and both M and N are integers.

Abstract: The present disclosure provides a household photovoltaic system and a smart micro-grid system. The household photovoltaic system includes a photovoltaic assembly module, a household photovoltaic inverter and an AC grid. The household photovoltaic system further includes a monitoring assembly and a wireless communication assembly. The monitoring assembly includes DC-side monitoring assemblies each configured to monitor an operating parameter of an output end of the photovoltaic assembly module, and AC-side monitoring assemblies each configured to monitor an operating parameter of an output end of the household photovoltaic inverter. The wireless communication assembly includes a DC-side wireless communication assembly and an AC-side wireless communication assembly which are configured to transmit the operating parameters monitored by each DC-side monitoring assembly and each AC-side monitoring assembly to a predetermined monitoring terminal.

Abstract: A photovoltaic combiner box monitoring system includes a current sampling circuit, a microprocessor and a communication circuit; the current sampling circuit is connected with the microprocessor to sample at least one channel of current signals and input the sampled currents to the microprocessor; and the microprocessor is connected with the communication circuit to send the current signals sampled by the current sampling circuit by the communication circuit. Thus, the photovoltaic combiner box monitoring system can sample current signals from the photovoltaic combiner box by means of the current sampling circuit and send the sampled current signals through the communication circuit.

Abstract: An additive for a positive electrode material includes an internal component and an external component. The internal component contains a silane coupling agent modified inorganic lithium salt. The external component is formed on a surface of the internal component and contains a polymer with a low melting point. The internal component and the external component form a core-shell structure together, and the shell has a porosity of 0.01% to 20%. A positive electrode material and a lithium-ion battery including the additive, and method of preparing the lithium-ion battery are also provided.

Abstract: The present disclosure provides a household photovoltaic system and a smart micro-grid system. The household photovoltaic system includes a photovoltaic assembly module, a household photovoltaic inverter and an AC grid. The household photovoltaic system further includes a monitoring assembly and a wireless communication assembly. The monitoring assembly includes DC-side monitoring assemblies each configured to monitor an operating parameter of an output end of the photovoltaic assembly module, and AC-side monitoring assemblies each configured to monitor an operating parameter of an output end of the household photovoltaic inverter. The wireless communication assembly includes a DC-side wireless communication assembly and an AC-side wireless communication assembly which are configured to transmit the operating parameters monitored by each DC-side monitoring assembly and each AC-side monitoring assembly to a predetermined monitoring terminal.

Abstract: A supporting structure for waterborne photovoltaic power generation is provided. The supporting structure includes at least one floating bracket. The floating bracket includes a floating platform and a plurality of supporting members provided on an upper surface of the floating platform, a ventilation space is provided between at least two adjacent supporting members, whereby the plurality of supporting members is configured to fix a photovoltaic cell panel thereon with a lower surface of the photovoltaic cell panel being separated from the upper surface of the floating platform.

Abstract: The present disclosure provides an IGBT driving circuit, including an optocoupler chip and a power amplification circuit. The optocoupler chip includes an isolation amplification unit and a fault protection unit, and the fault protection unit includes a desaturation module and a fault feedback module. The desaturation module is configured to transmit a warning signal to the fault feedback module when detecting that a potential of a collector of the IGBT is overhigh or the potential of the collector of the IGBT changes overfast. The fault feedback module is configured to transmit a fault control signal to the external controller after receiving the warning signal so as to control the external driving signal outputted by the external controller and enable the isolation amplification unit to output an IGBT driving signal for controlling a shutdown of the IGBT.

Abstract: Embodiment of the present disclosure provides a waterborne photovoltaic system, comprising a photovoltaic module, a photovoltaic support and a suspension device, wherein the photovoltaic module is secured to the photovoltaic support, the photovoltaic support is secured to the suspension device, the suspension device comprises a plurality of floating members, and each of the floating members comprises a plurality of floats.

Abstract: The present invention provides a power supply circuit and a power supply method. The power supply circuit comprises: a charge control unit, a battery and battery protection unit, a voltage stabilizing unit and a voltage boosting unit; the voltage boosting unit comprises: a consumption reducing module for, at the moment of turning on or turning off a power device in the voltage boosting unit, enabling an electric current flowing through the power device to be zero. The present invention, by arranging the consumption reducing module, enables an electric current flowing through the power device to be zero at the moment of turning on or turning off the power device in the voltage boosting unit, which realizes zero current turn-on or turn-off of the power device, and reduces consumption of the electric energy.

Abstract: A PV junction unit for joining a plurality of PV strings into a single string, comprising: a plurality of anode branch circuits; an anode busbar adapted to connect with an anode output end of each PV string via one corresponding anode branch circuit; a plurality of cathode branch circuits; a cathode busbar adapted to connect with a cathode output end of each PV string via one corresponding cathode branch circuit; resistors each of which is connected in series in one corresponding anode branch circuit connecting the anode output end of one corresponding PV string with the anode busbar, wherein each resistor has a theoretical resistance; voltage measuring devices each of which is connected in parallel with one corresponding resistor; and a processor connected with each of the voltage measuring devices, the processor configured to determine a current value in one PV string at least based on the theoretical resistance of the resistor in one anode branch circuit connected with the one PV string and based on a volt

Abstract: A supporting structure for waterborne photovoltaic power generation is provided. The supporting structure includes at least one floating bracket. The floating bracket includes a floating platform and a plurality of supporting members provided on an upper surface of the floating platform, a ventilation space is provided between at least two adjacent supporting members, whereby the plurality of supporting members is configured to fix a photovoltaic cell panel thereon with a lower surface of the photovoltaic cell panel being separated from the upper surface of the floating platform.

Abstract: The present disclosure provides an IGBT driving circuit, including an optocoupler chip and a power amplification circuit. The optocoupler chip includes an isolation amplification unit and a fault protection unit, and the fault protection unit includes a desaturation module and a fault feedback module. The desaturation module is configured to transmit a warning signal to the fault feedback module when detecting that a potential of a collector of the IGBT is overhigh or the potential of the collector of the IGBT changes overfast. The fault feedback module is configured to transmit a fault control signal to the external controller after receiving the warning signal so as to control the external driving signal outputted by the external controller and enable the isolation amplification unit to output an IGBT driving signal for controlling a shutdown of the IGBT.

Abstract: An additive for a positive electrode material includes an internal component and an external component. The internal component contains a silane coupling agent modified inorganic lithium salt. The external component is formed on a surface of the internal component and contains a polymer with a low melting point. The internal component and the external component form a core-shell structure together, and the shell has a porosity of 0.01% to 20%. A positive electrode material and a lithium-ion battery including the additive, and method of preparing the lithium-ion battery are also provided.

Abstract: A photovoltaic combiner box monitoring system includes a current sampling circuit, a microprocessor and a communication circuit; the current sampling circuit is connected with the microprocessor to sample at least one channel of current signals and input the sampled currents to the microprocessor; and the microprocessor is connected with the communication circuit to send the current signals sampled by the current sampling circuit by the communication circuit. Thus, the photovoltaic combiner box monitoring system can sample current signals from the photovoltaic combiner box by means of the current sampling circuit and send the sampled current signals through the communication circuit.

Abstract: The present disclosure provides a single-phase PLL controlling method and a single-phase PLL controlling device. The device includes a first FIR filter, a second FIR filter and a Park converter. The first FIR filter and the second FIR filter are configured to perform FIR filtration on a collected power grid voltage signal so as to acquire filtered signals, and output the filtered signals to the Park converter. A filtered signal V? acquired by the first FIR filter and a filtered signal V? acquired by the second FIR filter form a set of virtual two-phase signals in an ?? coordinate system. The Park converter is configured to perform Park conversion on the filtered signal V? and the filtered signal V?, so as to acquire a set of two-phase signals Vd and Vq in a dq coordinate system.

Abstract: The present disclosure provides a single-phase PLL controlling method and a single-phase PLL controlling device. The device includes a first FIR filter, a second FIR filter and a Park converter. The first FIR filter and the second FIR filter are configured to perform FIR filtration on a collected power grid voltage signal so as to acquire filtered signals, and output the filtered signals to the Park converter. A filtered signal V? acquired by the first FIR filter and a filtered signal V? acquired by the second FIR filter form a set of virtual two-phase signals in an ?? coordinate system. The Park converter is configured to perform Park conversion on the filtered signal V? and the filtered signal V?, so as to acquire a set of two-phase signals Vd and Vq in a dq coordinate system.

Abstract: The present invention provides a power supply circuit and a power supply method. The power supply circuit comprises: a charge control unit, a battery and battery protection unit, a voltage stabilizing unit and a voltage boosting unit; the voltage boosting unit comprises: a consumption reducing module for, at the moment of turning on or turning off a power device in the voltage boosting unit, enabling an electric current flowing through the power device to be zero. The present invention, by arranging the consumption reducing module, enables an electric current flowing through the power device to be zero at the moment of turning on or turning off the power device in the voltage boosting unit, which realizes zero current turn-on or turn-off of the power device, and reduces consumption of the electric energy.