Abstract: Disclosed is a fluorine-substituted Pi(?)-bridge selenide polymer acceptor material, its preparation and application. The selenide polymer acceptor material is named PYSe2FT and is synthesized by Knoevenagel condensation reaction and Still cross-coupling reaction; the material PYSe2FT takes a selenium-substituted core donor unit as a main structure, and combines a difluoro-substituted thiophene ?-electronic connection unit, where the selenium-substituted core donor unit and the difluoro-substituted thiophene ?-electronic connection unit can effectively regulate and control the molecular energy level, so that molecules generate good accumulation, thus making PYSe-2FT an excellent polymer acceptor material.

Abstract: A method for checking an insulation state of a battery or battery system comprising at least two batteries, comprising the following steps: measuring a voltage between a connection element of the battery and a ground over a predefined time; evaluating the measured voltage and determining whether a change in the measured voltage is present at time point that corresponds to a predefined temporal threshold value; and outputting a safety signal characterizing the insulation state on the basis of the established result.

Abstract: Disclosed are a small-molecule electron donor material with an electron-deficient heterocyclic core, preparation and application thereof, belonging to technical field of solar cells. According to the present application, a brand-new electron-deficient heterocyclic unit which has never been applied to an organic solar cell is used as a core unit to prepare a small-molecule electron donor material with an A-D-A?-D-A skeleton structure, and the molecular structure of the small-molecule electron donor material is shown in formula (I).

Abstract: Disclosed are a small-molecule electron donor material with an electron-deficient heterocyclic core, preparation and application thereof, belonging to technical field of solar cells. According to the present application, a brand-new electron-deficient heterocyclic unit which has never been applied to an organic solar cell is used as a core unit to prepare a small-molecule electron donor material with an A-D-A?-D-A skeleton structure, and the molecular structure of the small-molecule electron donor material is shown in formula (I).

Abstract: Disclosed are a ternary polymer donor material, a preparation method and application thereof. The ternary polymer donor material is prepared by Still cross-coupling reaction of chlorinated thiophene (BDT-2Cl), fluorinated thiophene (BDT-2F) and brominated thiophene (BDT-2Br). Terpolymer synthesized in the application is a ternary polymeric donor material based on synergistic effect of fluorine (F) and chlorine (Cl), molecular energy levels of the ternary polymeric donor material are effectively adjusted by controlling contents of the BDT-2Cl, thereby showing graded voltage change, and a balance between driving force and energy loss is achieved through the synergistic effect of the F and the Cl.

Abstract: The present disclosure belongs to the technical field of melt blown dies, and provides a preparation method for a low friction coating for a melt blown die. In the present disclosure, pretreatment, activation treatment, chemical deposition, and calcination are conducted on a surface of the melt blown die in sequence to deposit an Ni—P—Re coating on the surface of the melt blown die, thereby reducing the friction coefficient of the melt blown die. In the present disclosure, surface smoothness and hardness of the coating are improved by limiting the composition and ratio of a deposition solution used for the chemical deposition. The results of examples show that the low friction coating for a melt blown die prepared by the preparation method provided by the present disclosure has a thickness of 3.2 ?m, hardness of 820 HV, roughness Ra of 0.02 ?m, and a friction coefficient of 0.35 under non-lubricating conditions.

Abstract: Disclosed is a fluorine-substituted Pi(?)bridge selenide polymer acceptor material, its preparation and application. The selenide polymer acceptor material is named PYSe2FT and is synthesized by Knoevenagel condensation reaction and Still cross-coupling reaction; the material PYSe2FT takes a selenium-substituted core donor unit as a main structure, and combines a difluoro-substituted thiophene ?-electronic connection unit, where the selenium-substituted core donor unit and the difluoro-substituted thiophene ?-electronic connection unit can effectively regulate and control the molecular energy level, so that molecules generate good accumulation, thus making PYSe-2FT an excellent polymer acceptor material.

Abstract: A kit is employed in the method for detecting droplet drift or deposition characteristics of spray. The detection kit includes detection membranes carrying immobilized probes, transition probes capable of specifically binding to the immobilized probes, and biotinylated chromogenic probes capable of specifically binding to the transition probes. The transition probes are added to the agricultural spray as tracers. After spraying, the sprayed transition probes specifically bind to the immobilized probes on the detection membranes. The biotinylated chromogenic probes are added to bind to the transition probes through hybridization. After the chromogenic treatment, the deposition volume of droplets is determined according to the color depth, and the droplet parameters are determined according to the position and size of chromogenic spots.

Abstract: In at least one embodiment, an apparatus for monitoring isolation resistance in a vehicle is provided. The apparatus includes at least one controller that is configured to at least one of activate and deactivate any number of the plurality of switches and to perform a plurality of measurements on a high voltage system. The at least one controller is further configured to determine an isolation resistance between the high voltage system and the low voltage system based on the plurality of measurements and to determine a first resistance between the positive branch and a ground of the low voltage system based at least on the isolation resistance. The at least one controller is further configured to determine whether the isolation resistance of the high voltage system is exhibiting a symmetric failure, or an asymmetric failure based at least on the first resistance.

Abstract: In at least one embodiment, an apparatus for monitoring isolation resistance in a vehicle is provided. The apparatus includes at least one controller that is configured to at least one of activate and deactivate any number of the plurality of switches and to perform a plurality of measurements on a high voltage system. The at least one controller is further configured to determine an isolation resistance between the high voltage system and the low voltage system based on the plurality of measurements and to determine a first resistance between the positive branch and a ground of the low voltage system based at least on the isolation resistance. The at least one controller is further configured to determine whether the isolation resistance of the high voltage system is exhibiting a symmetric failure, or an asymmetric failure based at least on the first resistance.

Abstract: A permanent magnetic coupling device includes an conductor rotor, an permanent magnet rotor and permanent magnets. The permanent magnet rotor includes a magnetic ring. The magnetic ring includes protrusions and recesses arranged alternately, in which first airflow channels are formed between the protrusions and the conductor rotor respectively, and second airflow channels are formed between the recesses and the conductor rotor respectively. A cross-sectional area of each of the second airflow channels is greater than a cross-sectional area of each of the first airflow channels. The permanent magnet rotor further includes cavities disposed at the recesses, and the permanent magnets are engaged into the cavities respectively.

Abstract: A cylindrical permanent magnetic coupling device includes a conductor rotor and a permanent magnet rotor. The conductor rotor includes a bottom and a sidewall surrounding the bottom for defining a cavity, in which the cavity includes at least two different inner diameters. The permanent magnet rotor is arranged in the cavity for providing at least two different air gaps between the conductor rotor and the permanent magnet rotor.

Abstract: A rotor and a rotary electric machine containing the rotor are provided. The rotor includes a shaft, a rotor core coaxially connected to the shaft, a first axial magnetic steel and a second axial magnetic steel disposed at an end surface of the rotor core, a rotor bushing, and a first magnetic isolation groove. The first axial magnetic steel has a first magnetic pole facing the rotor core. The second axial magnetic steel has a second magnetic pole facing the rotor core. The rotor bushing is disposed at a side of the first and second axial magnetic steels opposite to the rotor core. The first magnetic isolation groove is formed in the rotor core along a radius direction of the rotor core. The first magnetic isolation groove is disposed between the first axial magnetic steel and the second axial magnetic steel to isolate the first pole and the second pole.

Abstract: A rotor and a rotary electric machine containing the rotor are provided. The rotor includes a shaft, a rotor core coaxially connected to the shaft, at least one tangential magnetic steel, a first axial magnetic steel, and a second axial magnetic steel. The tangential magnetic steel is fixed in the rotor core along a tangential direction of the rotor core, and has first and second magnetic poles. The first axial magnetic steel disposed at one end surface of the rotor core is adjacent to the first pole, and has a third pole facing the rotor core, wherein the third pole and first pole repel each other. The second axial magnetic steel disposed at the end surface of the rotor core is adjacent to the second pole, and has a fourth pole facing the rotor core, wherein the fourth pole and the second pole repel each other.