Abstract: A laterally diffused metal oxide semiconductor device and a preparation method thereof are disclosed. The semiconductor device includes: a substrate; a body region having a first conductivity type and formed in the substrate; a drift region, having a second conductivity type, formed in the substrate and adjacent to the body region; a field plate structure, formed on the drift region, a lower surface of an end of the field plate structure close to the body region being flush with the upper surface of the substrate, and the end of the field plate structure close to the body region also having an upwardly extending inclined surface; and a drain region, having a second conductivity type, formed in an upper layer of the drift region, and in contact with the end of the field plate structure away from the body region.

Abstract: A sampling device and method for evaluating ecological risk of soil in a high geological background area comprises an impact sampling mechanism, a soil layer stripping mechanism and an auxiliary support frame. The impact sampling mechanism comprises a sampling hopper with a downward opening. A connecting sliding rod is fixedly arranged on the top of the sampling hopper. An upper end of the connecting sliding rod is connected with an impact rod. The impact rod is internally provided with an impact hammer capable of reciprocating along an axis of the impact rod. The soil layer stripping mechanism comprises a stripping sliding cylinder in sliding fit with the connecting sliding rod, and a support disc. A plurality of stripping plates are connected to a lower side edge of the support disc in a sliding fit mode.

Abstract: A sampling device and method for evaluating ecological risk of soil in a high geological background area comprises an impact sampling mechanism, a soil layer stripping mechanism and an auxiliary support frame. The impact sampling mechanism comprises a sampling hopper with a downward opening. A connecting sliding rod is fixedly arranged on the top of the sampling hopper. An upper end of the connecting sliding rod is connected with an impact rod. The impact rod is internally provided with an impact hammer capable of reciprocating along an axis of the impact rod. The soil layer stripping mechanism comprises a stripping sliding cylinder in sliding fit with the connecting sliding rod, and a support disc. A plurality of stripping plates are connected to a lower side edge of the support disc in a sliding fit mode.

Abstract: An automatic cleaning device, comprising: a moving platform configured to automatically move on an operation surface; a cleaning module which is provided on the moving platform and comprises a wet-type cleaning module configured to clean at least a part of the operation surface in a wet-type cleaning mode and a dry-type cleaning module configured to clean at least a part of the operation surface in a dry-type cleaning mode; and a floating lifting/lowering structure connected to the dry-type cleaning module and configured to enable the dry-type cleaning module to passively move up and down relative to the moving platform.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to a process for chemoselective substitution on a halopyrimidine carboxaldehyde having multiple reactive sites and subsequent stereoselective oxime formation.

Abstract: The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H4 receptor modulators, and to intermediates in H4 modulator synthesis.

Abstract: The present invention is directed to a process for chemoselective substitution on a halopyrimidine carboxaldehyde having multiple reactive sites and subsequent stereoselective oxime formation.