Abstract: Disclosed are a head-mounted display system and a manned device. The head-mounted display system comprises: a head-mounted display apparatus, a touch device and a manned terminal apparatus, wherein the touch device is arranged on the manned device and is in communication connection with the manned terminal apparatus, the manned terminal apparatus is arranged on the manned device and comprises a power supply module and a processor module, and the head-mounted display apparatus comprises at least one display screen, is in communication connection with the manned terminal apparatus, and is configured to execute a control operation corresponding to a touch operation performed on the touch device by a passenger user of the manned device. The head-mounted display system enables the passenger to watch the screen content without maintaining a certain posture for a long time, and improves the personalized experience and privacy experience of the passenger.

Abstract: The present disclosure provides an additive and a method for terminating polymerization and/or reducing viscosity of polymer solution. The additive comprises a carboxylic acid, an alcohol, a salt chosen from alkali metal salts, alkaline earth metal salts, ammonium salts, and any combination thereof, and optionally, water. The method of the present disclosure comprises adding the additive according to present disclosure into a polymer solution and mixing the resulting mixture. The additive of the present disclosure can terminate living polymer chain ends efficiently and can destroy catalytic active centers and can substantially reduce the viscosity of a polymer solution.

Abstract: The present invention provides a new method for synthesizing maxacalcitol and an intermediate thereof. According to the method, the maxacalcitol is creatively synthesized through the steps of: taking vitamin D2 as an initial raw material, obtaining a compound represented by formula II, oxidizing, chirally reducing, grafting with a side chain, introducing a hydroxyl group on the C-1 position, and photochemically overturning.

Abstract: Phenyl propanoic acid compounds having activating effect on peroxisome proliferator-activated receptors (PPAR?,?,?) and a preparation method and uses thereof are provided in the present invention. The compounds can be used for treating or preventing diseases associated with peroxisome proliferator-activated receptors (PPAR?,?,?).

Abstract: The present disclosure provides an additive and a method for terminating polymerization and/or reducing viscosity of polymer solution. The additive comprises a carboxylic acid, an alcohol, a salt chosen from alkali metal salts, alkaline earth metal salts, ammonium salts, and any combination thereof, and optionally, water. The method of the present disclosure comprises adding the additive according to present disclosure into a polymer solution and mixing the resulting mixture. The additive of the present disclosure can terminate living polymer chain ends efficiently and can destroy catalytic active centers and can substantially reduce the viscosity of a polymer solution.

Abstract: Phenyl propanoic acid compounds having activating effect on peroxisome proliferator-activated receptors (PPAR?,?,?) and a preparation method and uses thereof are provided in the present invention. The compounds can be used for treating or preventing diseases associated with peroxisome proliferator-activated receptors (PPAR?,?,?).

Abstract: The present invention relates to a method for laser ranging with high precision and high efficient, a method for identifying distance mode automatically during laser ranging process, and a laser ranger with high precision, high efficient and low power waste. The accuracy of ranging is increased through multi classes of receiving process; the accuracy of ranging is further increased through the selection of distance mode and the adjustment of receiving sensitivity before the measuring steps are executed; the accuracy of ranging is further increased through executing jitter judgment on obtained distance measured values to discard the distance measured values that do not satisfy the setting conditions and judge whether the number of remaining distance measured values satisfies the setting quantity requirement; and the present invention is also of simple structure, high measurement efficiency, and low power waste.

Abstract: The present invention relates to a method for laser ranging with high precision and high efficient, a method for identifying distance mode automatically during laser ranging process, and a laser ranger with high precision, high efficient and low power waste. The accuracy of ranging is increased through multi classes of receiving process; the accuracy of ranging is further increased through the selection of distance mode and the adjustment of receiving sensitivity before the measuring steps are executed; the accuracy of ranging is further increased through executing jitter judgment on obtained distance measured values to discard the distance measured values that do not satisfy the setting conditions and judge whether the number of remaining distance measured values satisfies the setting quantity requirement; and the present invention is also of simple structure, high measurement efficiency, and low power waste.

Abstract: The present invention relates to a novel process for preparing losartan, an imidazole derivative with the chemical name 2-n-butyl-4-chloro-5-hydroxymethyl-1-{[2?-(1H-tetrazol-5-yl)biphenyl-4-]methyl}imidazole, and pharmacologically active salts thereof. The invention further relates to novel intermediates which are suitable for preparing losartan and to novel processes for preparing intermediate compounds which are suitable for preparing losartan. One aspect of the invention is a process for preparing a compound of the general formula I which can form as an intermediate in an inventive preparation of losartan.

Abstract: The present invention relates to novel processes for the preparation of candesartan or of a protected form of candesartan, of a candesartan salt or of a candesartan ester; compounds which can be used in processes according to the invention, processes for their preparation, their use in processes according to the invention; a novel polymorphic form of candesartan cilexetil, a process for its preparation and its use for the production of a medicament.