Cone beam CT scatter correction method and system

The invention relates to a cone beam CT scatter correction method and system. The method comprises the following steps that an attenuation coefficient matrix of an X-ray passing through an attenuation screen on a detector is calculated; under the condition that the attenuation screen is included, projected images of a radiated object are acquired; scatter correction is conducted on each projected image; the projected image of a template body without the attenuation screen is estimated through the attenuation coefficient matrix; the image is reconstructed through a FDK algorithm. The cone beam CT scatter correction method can effectively lower the scatter influence on cone beam CT image reconstruction, and the image quality is improved. Circular scanning is only conducted on cone beam CT for one time, and irradiation dose is not additionally increased. The cone beam CT scatter correction method is simple to implement, and the main structure and the stability of the cone beam CT are not changed ...

一种重楼提取物及其应用

The present invention discloses one kind of Chinese paris extractive and its application. The Chinese paris extractive is prepared with whole Chinese paris as material and through thrice reflux extraction with 30-100 % concentration alcohol at 0-90 deg.c, merging extractive liquid, depression recovering alcohol, defatting with active carbon to obtain the wet extract of specific 1.05 as the extractive. External antiviral pharmacodynamical test shows that the extractive has excellent herpesvirus resisting function, powerful pharmacological effect, wide range of indications and excellent medicinal foreground.

Silicon based substrate mercury cadmium telluride rheotaxial growth method

Corrosive agent and corrosion method for II-VI family semiconductor material line defect display

The invention discloses a corrosive agent which is used for showing the dislocation of II-VI group semiconductor materials and the corrosive agent is provided with the component ratio of 80ml: 6 to 10ml: 10 to 15ml: 0 to 5ml: 5.1g: 2.0 to 7.0g of H2O to HCl to HNO 3 to HF to K2Cr2O7 to CrO3; wherein, the II-VI group semiconductor materials are ZnyCd1-yTe materials and Hg1-xCdxTe thin film materials which develop by taking the ZnyCd1-yTe materials as the substrate extension; the corrosion method comprises the pretreatment of the eroded samples, the dislocation erosion and the post treatment of the eroded samples; compared with two present common Schaake and Chen corrosive agents specially used for showing the dislocation of the Hg1-xCdxTe thin film materials, the invention has the advantages of bigger shape of a corrosive pit and clear rules and background, and showing the dislocation corrosive pit of the substrate materials Cd1-yZnyTe, which has great significance in the study of the dislocation ...

Corrosive agent and corrosion method for II-VI family semiconductor material dislocation display

Method for extracting 6-O-coffee acylarbutin

The invention relates to a method for extracting arbutin, expecially extraction from plants. It comprises following steps: (1) disintegrating platycodon glaucus plants to coarse powder, adding 50- 90% (volumetric concentration) water- containing ethanol with its weight being 4- 10 times of that of plants, refluxing and extracting, combining with extract liquor, recovering ethanol, getting wet concrete; (2) adding hot water with its weight being 2- 5 times of that of wet concrete for disslovation, filtering at 60- 80 Deg. C with membrane, collecting filter liquid, cooling, stewing for 24 hours, recrystallizing; (3) collecting said crystal, adding 60- 80% of water- containing ethanol for disslovation, adding active carbon for decoloring, filtering and recovering ethanol, cooling for crystallization and getting required 6- 0- coffee acyl arbutin. The invention is characterized by effective combination of steps of extraction, membrane filtering, active carbon decoloring and recrystallization ...

Edulcoration purification process for rhizoma paris saponin extract solution

The invention relates to a method for carrying out impurity removal and purification on an extracting solution containing effective plant compositions. The method for carrying out impurity removal and purification on an extracting solution of Paris rhizome saponin comprises the following steps: 1. a Paris rhizome plant is pulverized into coarse powders; the coarse powders are extracted through a menstruum, and is filtered,; residue and impurity are removed to obtain coarse extracting solution of the Paris rhizome saponin; and the menstruum is a mixture of water and one or more than one of organic solvents of methanol, ethanol, acetone, normal butanol, ethyl acetate and chloroform; 2. the coarse extracting solution obtained in the step one is condensed to a suspending solution with density between 1.01 and 1.05 at the temperature of 25 DEG C; and 3. the suspending solution is filtered through an inorganic ceramic film of which the material is a zirconium dioxide film with film aperture of ...

Method and system for distributing storage areas among multiple processing cards

The embodiment of the invention provides a method and a system for distributing storage areas among multiple processing cards, direct connection channels and/or indirect channels are arranged among the multiple processing cards, and the indirect channels comprise direct connection channels with more than two hops; the method is characterized by comprising the following steps: receiving calling of an application process through a storage client, and initiating a storage area allocation request to a storage service process; the storage area distribution request comprises a required area size; selecting a target processing card from the multiple processing cards through a storage service process, determining a target storage area to be distributed on the target processing card, and returning an identifier of the target storage area to the storage client; and providing the target storage area for the application process to use through a storage client based on the identifier.

Health protection food for antifatigue and raising oxygen deficiency tolerance

A health-care food for improving the tolerence to fatigue and anoxia is prepared from notoginseng, astragalus root, ginseng, pueraria root, amino acids and vitamines.

Data transmission method and system among multiple processing cards

The embodiment of the invention provides a data transmission method and system among multiple processing cards, and relates to the technical field of computers, and the method is technically characterized by comprising the following steps: receiving calling of an application process through a data transmission client, and initiating an inter-card data transmission request to a data transmission service process; selecting more than one target channel from more than two channels between a first processing card corresponding to a source address and a second processing card corresponding to a target address through a data transmission service process, and returning a target channel identifier to the data transmission client; obtaining more than one data subset of the to-be-transmitted data based on the number of target channels and the to-be-transmitted data through the data transmission client; initiating a data transmission instruction to a transmission process on a processing card related ...

Method for extracting 6-O-coffee acylarbutin

The invention relates to a method for extracting arbutin, expecially extraction from plants. It comprises following steps: (1) disintegrating platycodon glaucus plants to coarse powder, adding 50- 90% (volumetric concentration) water- containing ethanol with its weight being 4- 10 times of that of plants, refluxing and extracting, combining with extract liquor, recovering ethanol, getting wet concrete; (2) adding hot water with its weight being 2- 5 times of that of wet concrete for disslovation, filtering at 60- 80 Deg. C with membrane, collecting filter liquid, cooling, stewing for 24 hours, recrystallizing; (3) collecting said crystal, adding 60- 80% of water- containing ethanol for disslovation, adding active carbon for decoloring, filtering and recovering ethanol, cooling for crystallization and getting required 6- 0- coffee acyl arbutin. The invention is characterized by effective combination of steps of extraction, membrane filtering, active carbon decoloring and recrystallization ...

Use of extract of rhizome of Chinese paris

Silicon based substrate mercury cadmium telluride rheotaxial growth method and special graphite boat

This invention discloses an epitaxial growing method for Si/HgCdTe liquid including: growing a SiO2 cover layer out of a Si/CdTe compound substrate then applying a mode of combining temperature-reduction at constant speed with cooling step by step to grow a HgCdTe epitaxial film. Advantages: the SiO2 cover layer can protect surface of the substrate and isolate contact of Si with melt liquor, and the method can avoid melt of a thin buffer layer and reduce contact time of the liquor with Si/CdTe so as to control dissolution of Si.

重楼总皂苷的制备方法

A process for preparing the common saponin of Chinese paris rhizome includes such steps as extracting, separating and purifying, and features that the extracting in alcohol, membrane filtering, resin adsorbing, resin decoloring, decoloring with activated carbon and defatting with acetone are combined. Its advantages are high extracting rate and low cost.