Abstract: Disclosed is an open earphone, comprising a sound production component and an ear hook. The ear hook may include a first portion and a second portion connected in sequence. The first portion may be hung between the auricle of a user and the head of the user, the second portion may extend toward a front outer side of the auricle and connect the sound production component, and the sound production component may be located close to the ear canal but not block the opening of the ear canal; wherein the sound production component and the auricle may have a first projection and a second projection on a sagittal plane, respectively, a centroid of the first projection may have a first distance from a highest point of the second projection in a vertical axis direction, a ratio of the first distance to a height of the second projection in the vertical axis direction may be within a range of 0.25-0.

Abstract: The present disclosure discloses a loudspeaker apparatus. The loudspeaker apparatus may include a circuit housing, an ear hook, a rear hook, a loudspeaker component, and a magnetic connector. The circuit housing may be configured to accommodate a control circuit or a battery component. The ear hook may be connected to one end of the circuit housing and at least partially covered by a first protective housing. The rear hook connected to another end of the circuit housing and at least partially covered by a second protective housing. The magnetic connector may be configured to absorb a charging interface of an external power source to establish an electrical connection so as to charge the loudspeaker apparatus.

Abstract: A cleaning device for a floor mopping machine comprises a bucket body for containing water, wherein a water removal member and a water feeding mechanism for conveying water from the bucket body to a wiping object of a floor mopping machine are arranged in the bucket body. During cleaning, the water feeding mechanism runs to convey water to the wiping object; and when water is removed, the water feeding mechanism stops running, and the wiping object of the floor mopping machine is wiped with the water removal member. Power of the water feeding mechanism is used for water feeding, and a wiping head is automatically cleaned, and can be wiped dry without any other operation after being cleaned; and the cleaning device is simple in structure, portable to use, less prone to damage and can be freely switched between a cleaning mode and a wipe-drying mode.

Abstract: A lift-type cleaning device for a floor washer, a cleaning tool for cleaning a floor is disposed on the floor washer. The lift-type cleaning device includes a bucket for containing water, a drying member and a driver. The drying member and the driver are kept static during spin-drying and are disposed in the bucket. The cleaning tool is matched with the drying member. The driver is connected with the drying member and is able to control the drying member to rise. During cleaning, the drying member is located below. During drying, the. A support base is disposed in the bucket and supports the floor washer away from a bottom of the bucket. The support base is connected with the bottom of the bucket or is connected with the driver. The driver drives the support base to rise or fall.

Abstract: A cleaning device for a floor mopping machine comprises a bucket body for containing water, wherein a water removal member and a water feeding mechanism for conveying water from the bucket body to a wiping object of a floor mopping machine are arranged in the bucket body. During cleaning, the water feeding mechanism runs to convey water to the wiping object; and when water is removed, the water feeding mechanism stops running, and the wiping object of the floor mopping machine is wiped with the water removal member. Power of the water feeding mechanism is used for water feeding, and a wiping head is automatically cleaned, and can be wiped dry without any other operation after being cleaned; and the cleaning device is simple in structure, portable to use, less prone to damage and can be freely switched between a cleaning mode and a wipe-drying mode.

Abstract: A wiping object cleaning device for a floor mopping machine belongs to the technical field of cleaning appliances. The wiping object cleaning device includes a bucket body, and further includes a water conveying mechanism for conveying water to a wiping object of a floor mopping machine. The water conveying mechanism conveys water during cleaning, and stops conveying water during water removal. The wiping object cleaning device is able to clean a mop of a floor mopping machine efficiently, wide in application range, suitable for different wiping objects of floor mopping machines, and low in production cost.

Abstract: Disclosed is a method for determining the suitability of a cell therapy for an individual. By means of using a bioinformatic method and an experimental analysis method for an unbiased potential off-target site, a potential off-target site of a genetically modified cell from an individual is predicted before administering a cell therapy to an individual, and the potential off-target site is monitored after administering, to the individual, the genetically modified cell from the individual to determine whether gene editing occurs at the potential off-target site and to evaluate the suitability of the therapy on the basis of the occurrence of a gene editing event.

Abstract: A lift-type cleaning device for a floor washer, a cleaning tool for cleaning a floor is disposed on the floor washer. The lift-type cleaning device includes a bucket for containing water, a drying member and a driver. The drying member and the driver are kept static during spin-drying and are disposed in the bucket. The cleaning tool is matched with the drying member. The driver is connected with the drying member and is able to control the drying member to rise. During cleaning, the drying member is located below. During drying, the. A support base is disposed in the bucket and supports the floor washer away from a bottom of the bucket. The support base is connected with the bottom of the bucket or is connected with the driver. The driver drives the support base to rise or fall.

Abstract: A composite hot-melt adhesive mesh film and preparation process thereof, in particular, a composite hot-melt adhesive mesh film and preparation process thereof for bonding metal and non-polar material are disclosed. The mesh film is compounded of a polar polyamide hot-melt adhesive and a non-polar polyolefin hot-melt adhesive mesh film containing a compatibilizer. The mesh film has a high adhesive strength and a durable and stable adhesion, and is especially suitable for bonding stainless steel, aluminum, copper or other metal materials and polyethylene, polypropylene or other non-polar polymers. Additionally, the preparation process is completed in one set of production process from raw material pretreatment to the final preparation of the hot melt adhesive mesh film product, thereby greatly reducing production failures, and providing high production efficiency and low costs.

Abstract: A composite hot-melt adhesive mesh film and preparation process thereof, in particular, a composite hot-melt adhesive mesh film and preparation process thereof for bonding metal and non-polar material are disclosed. The mesh film is compounded of a polar polyamide hot-melt adhesive and a non-polar polyolefin hot-melt adhesive mesh film containing a compatibilizer. The mesh film has a high adhesive strength and a durable and stable adhesion, and is especially suitable for bonding stainless steel, aluminum, copper or other metal materials and polyethylene, polypropylene or other non-polar polymers. Additionally, the preparation process is completed in one set of production process from raw material pretreatment to the final preparation of the hot melt adhesive mesh film product, thereby greatly reducing production failures, and providing high production efficiency and low costs.

Abstract: The present invention relates to a method for preparing 2,2?,6,6?-tetraoxazolinyl biphenyl ligand in chemical industry field. In the present invention, compound (III) is reacted with an activator that can activate the hydroxyl group selected from the group consisting of alkyl halosulfonium compound, aryl halosulfonium compound, phosphoryl chloride, phosphorus pentachloride, thionyl chloride and triphenyl phosphine, in the presence of alkali(s), to give the target product (IV), 2,2?,6,6?-tetraoxazolinyl biphenyl ligand. The ligand of the present invention can be used in various asymmetric reactions catalyzed by metals, with high reactivity and stereoselectivity, and thus represents a good application outlook.

Abstract: The present invention relates to a 5,5?-position linked 1,1?-biphenyl axis chiral ligand in chemical industry field. The present invention incorporates both the central chirality of oxazoline and the axial chirality of diphenyls. Such ligand can be used in various asymmetric reactions catalyzed by metal with high reactivity and stereoselectivity, and thus represents a good application outlook. The ligand of the present invention has the formula of: wherein: n=5, 6, 7, 8, 9, 10, 11 or 12; R1=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R2=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R3=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R4=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl.

Abstract: The present invention relates to a 5,5?-position linked 1,1?-biphenyl axis chiral ligand in chemical industry field. The present invention incorporates both the central chirality of oxazoline and the axial chirality of diphenyls. Such ligand can be used in various asymmetric reactions catalyzed by metal with high reactivity and stereoselectivity, and thus represents a good application outlook. The ligand of the present invention has the formula of: wherein: n=5, 6, 7, 8, 9, 10, 11 or 12; R1=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R2=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R3=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R4=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl.

Abstract: The present invention relates to a method for preparing 2,2?,6,6?-tetraoxazolinyl biphenyl ligand in chemical industry field. In the present invention, compound (III) is reacted with an activator that can activate the hydroxyl group selected from the group consisting of alkyl halosulfonium compound, aryl halosulfonium compound, phosphoryl chloride, phosphorus pentachloride, thionyl chloride and triphenyl phosphine, in the presence of alkali(s), to give the target product (IV), 2,2?,6,6?-tetraoxazolinyl biphenyl ligand. The ligand of the present invention can be used in various asymmetric reactions catalyzed by metals, with high reactivity and stereoselectivity, and thus represents a good application outlook.