Abstract: A series-parallel switched capacitor voltage converter includes inductive branch, a first branch and a second branch, the inductive branch is connected between the first branch and the second branch. By controlling turning on and off of the switches of the first branch, the second branch and inductive branch, charges on capacitors of one branch are completely transferred to another branch via the inductive branch within a period of time after all main switches of the first branch and the second branch are turned off, and a voltage difference between both terminals of each of the main switches becomes zero, then each of the main switches is started to be turned on, the voltage difference of each of the main switches is zero at an instant when the main switches are turned on.

Abstract: A switched capacitor voltage converter includes an inductive branch and two branches, by controlling a turning on and off of switch transistors, charges on a parasitic capacitor of one branch are completely transferred to another branch of the two branches via the inductive branch within a period of time after primary switch transistors are turned off, and voltage difference between both terminals of each of the primary switch transistors become zero, and then the primary switch transistors are started to be turned on, the respective voltage differences of the primary switch transistors are zero at a moment when the primary switch transistors are turned on.

Abstract: A biphasic Dickson switched capacitor converter includes an auxiliary circuit, a first branch and a second branch, the auxiliary circuit is connected between the first branch and the second branch, and electric charges at one of the first branch and the second branch are transferred to another of the first branch and the second branch by controlling the auxiliary circuit during a dead time when primary power transistors are turned off to realize the primary power transistors turn on at zero voltage and reduce a switching loss.

Abstract: An additive compound for dyeing an aluminum or aluminum alloy substrate after anodic oxidation to provide better uniformity in dyeing and hence a better finished appearance includes a main agent, an auxiliary agent, a pH stabilizer, an antibacterial agent, and a moderating agent. The antibacterial agent includes at least one of sorbic acid, fluconazole, itraconazole, artemisia argyi, benzyl alcohol, benzoic acid, salicylic acid, and boric acid. The moderating agent includes at least one of amino acid, amino salt, sulfate, nitrate, and chloride. An additive solution and a dyeing method are also provided, the use of the compound also allows for a more rapid dyeing process.

Abstract: An additive compound for dyeing an aluminum or aluminum alloy substrate after anodic oxidation to provide better uniformity in dyeing and hence a better finished appearance includes a main agent, an auxiliary agent, a pH stabilizer, and an antibacterial agent. The antibacterial agent includes at least one of sorbic acid, fluconazole, itraconazole, Artemisia argyi, benzyl alcohol, benzoic acid, salicylic acid, and boric acid. An additive solution and a dyeing method are also provided, the use of the compound also allows for a more rapid dyeing process.

Abstract: The present disclosure is related to plant bioprotection compositions comprising microalgae components. The disclosure also provides methods of using the bioprotection compositions, e.g., for suppressing, delaying, or treating pathogen infection within host plants.

Abstract: The present disclosure provides methods for improving the nutrient utilization, resistance to abiotic stress, and recovery from abiotic stress of a host plant by applying a microalgae composition to the host plant. The disclosure also provides methods for improving soil fitness and improving rhizospheric activity and/or growth by applying a microalgae composition to the soil.

Abstract: The present invention relates to the field of petroleum industry phase oilfield chemistry, and specifically relates to a bionic and dual-phobic drilling fluid. The drilling fluid contains a bionic wall-fixing agent, a bionic lubricant, a super dual-phobic agent, a scrap-carrying agent and a bionic shale inhibitor. The present invention uses the theory of bionics and the theory of a downhole rock surface being double phobic as a basis. By means of using the bionic wall-fixing agent, the bionic lubricant, the super dual-phobic agent, the scrap-carrying agent and the bionic shale inhibitor, which have special properties of imitating animals and plants in nature, and using a series of bionic treatment agents, a set of bionic and dual-phobic drilling fluid systems, which corresponds to an unconventional, complex oil and gas well, is formed.

Abstract: A two-channel burner includes a pulverized coal supply mechanism, a transition channel, an inner secondary air guide tube, an outer secondary air guide tube, a combustion stabilizing chamber, and a flow smoothing chamber. The outer secondary air guide tube, the combustion stabilizing chamber, and the flow smoothing chamber are sequentially connected to form a burner body. The pulverized coal supply mechanism passes through an interior of the burner body. The transition channel is fitted over the pulverized coal supply mechanism. The inner secondary air guide tube is disposed between the transition channel and the outer secondary air guide tube and forms an inner secondary air passage together with the transition channel, and forms an outer secondary air passage together with the outer secondary air guide tube. An outlet end of the inner secondary air guide tube is formed to have a flared opening.

Abstract: The present invention relates to a process for synthesizing a compound of formula (I), wherein R1 is hydrogen or halogen; R2 is hydrogen, halogen or cyano; n is 0-7, particularly n is 2-3, more particularly n is 2; or diastereomer, pharmaceutically acceptable salts thereof, which is useful for prophylaxis and treatment of a disease caused by bacteria infection.

Abstract: An air supply assembly for a refrigerator, includes: an air duct cover plate defining, together with a refrigerator liner, an air supply space and configured to isolate the air supply space from a storage space in a compartment of the refrigerator, and a centrifugal wind wheel arranged in the air supply space, and axially sucking air in and blowing the air out towards a peripheral side, wherein a plurality of air return ports are provided in the air duct cover plate to allow air in the storage space to enter the air supply space; and the centrifugal wind wheel abuts against an inner side of the air duct cover plate and is configured to suck air in from a rear side thereof, such that air entering the air supply space via the air return ports is sucked in from the rear side of the centrifugal wind wheel.

Abstract: The present invention provides an intelligent geophysical data acquisition system and acquisition method for shale oil and gas optical fiber. A pipe string is arranged in a metal casing, and an external armored optical cable is fixed outside the metal casing; an, internal armored optical cable is fixed outside the pipe string; the external armored optical cable comprises a downhole acoustic sensing optical cable, two multi-mode optical fibers, a strain optical cable and a pressure sensor array, and further comprises horizontal ground acoustic sensing optical cables arranged in the shallow part of the ground according to an orthogonal grid, and artificial seismic source excitation points arranged on the ground according to the orthogonal grid.

Abstract: A 4D quantitative and intelligent diagnosis method for spatio-temporal evolution of oil-gas reservoir damage types and extent includes: determining a characteristic parameter characterizing reservoir damage by each of a plurality of factors based on a spatio-temporal evolution simulation equation of reservoir damage by each of the plurality of factors; and determining an effective characteristic parameter characterizing the damage extent of the reservoir based on the characteristic parameter characterizing reservoir damage by each of the plurality of factors. The method quantitatively simulate the characteristic parameters of reservoir damage caused by the various factors and a total characteristic parameter of the reservoir damage.

Abstract: An additive compound for dyeing an aluminum or aluminum alloy substrate after anodic oxidation to provide better uniformity in dyeing and hence a better finished appearance includes a main agent, an auxiliary agent, a pH stabilizer, and an antibacterial agent. The antibacterial agent includes at least one of sorbic acid, fluconazole, itraconazole, Artemisia argyi, benzyl alcohol, benzoic acid, salicylic acid, and boric acid. An additive solution and a dyeing method are also provided, the use of the compound also allows for a more rapid dyeing process.

Abstract: A biphasic Dickson switched capacitor converter with zero voltage switching is provided. The biphasic Dickson switched capacitor converter introduces an auxiliary circuit between middle points of two freewheeling bridge arms of a conventional biphasic Dickson converter, and charges at a middle point of a first freewheeling bridge arm are transferred to a second freewheeling bridge arm by controlling the auxiliary circuit during a dead time when main power transistors are turned off to realize zero voltage switching of the main power transistors and reduce a switching loss. An on-resistance of an introduced auxiliary power transistor is larger than an on-resistance of the main power transistors. An inductance value of an auxiliary inductor is small and a package size and cost are low. Therefore, the biphasic Dickson switched capacitor converter reduces the switching loss of switched capacitor converter, improve efficiency, have performance benefits and commercial prospects by introducing the auxiliary circuit.

Abstract: A series-parallel switched capacitor voltage converter includes inductive branch, a first branch and a second branch, the inductive branch is connected between the first branch and the second branch. By controlling turning on and off of the switches of the first branch, the second branch and inductive branch, charges on capacitors of one branch are completely transferred to another branch via the inductive branch within a period of time after all main switches of the first branch and the second branch are turned off, and a voltage difference between both terminals of each of the main switches becomes zero, then each of the main switches is started to be turned on, the voltage difference of each of the main switches is zero at an instant when the main switches are turned on.

Abstract: A cascade switched capacitor converter includes an auxiliary circuit, a first branch and a second branch, the auxiliary circuit is connected between the first branch and the second branch, all power transistors of the first branch and the second branch are primary power transistors, and the auxiliary circuit transfers a charge or electric charges on one of the first branch and the second branch to another of the first branch and the second branch during a dead time when the primary power transistors are turned off, so as to the primary power transistors turn on at zero voltage and reduce a switching loss.

Abstract: A switched capacitor voltage converter includes an inductor and a plurality of switch transistors between two branches of a conventional parallel switched capacitor voltage converter, by controlling a turning on and off of the plurality of switch transistors, electric charges on a parasitic capacitor of a first branch are completely transferred to a second branch via the inductor within a period of time when all primary switch transistors are turned off, so that a voltage difference between both terminals of each of the primary switch transistors becomes zero, then the each of the primary switch transistors is turned on, the voltage difference between both terminals of the each of the primary switch transistors becomes zero at an instant when the each of primary switch transistors is turned on respectively, therefore a switching loss of the plurality of switch transistors is reduced and a conversion efficiency is improved.

Abstract: A biphasic Dickson switched capacitor converter includes an auxiliary circuit, a first branch and a second branch, the auxiliary circuit is connected between the first branch and the second branch, and electric charges at one of the first branch and the second branch are transferred to another of the first branch and the second branch by controlling the auxiliary circuit during a dead time when primary power transistors are turned off to realize the primary power transistors turn on at zero voltage and reduce a switching loss.

Abstract: A switched capacitor voltage converter includes an inductive branch and two branches, by controlling a turning on and off of switch transistors, charges on a parasitic capacitor of one branch are completely transferred to another branch of the two branches via the inductive branch within a period of time after primary switch transistors are turned off, and voltage difference between both terminals of each of the primary switch transistors become zero, and then the primary switch transistors are started to be turned on, the respective voltage differences of the primary switch transistors are zero at a moment when the primary switch transistors are turned on.