Low viscosity poly-a-olefin lubricating oil and synthesis method thereof

Low viscosity poly-a-olefin lubricating oil and synthesis method thereof

The present invention provides a low viscosity poly-α-olefin (PAO) lubricating oil and a synthesis method thereof. The method comprises the following steps: (1) dehydration treatment: the α-olefin raw material (e.g. 1-decene) is subjected to dehydration treatment so that the water content in the raw material is ≤10 ppm; (2) polymerization reaction: a reaction of the dehydration treated α-olefin raw material is carried out in the presence of a complex catalyst and gaseous BF3 to obtain a reaction product, wherein the pressure of the gaseous BF3 is 0.01 to 1 MPa; (3) catalyst removal: the reaction product obtained in step (2) is sequentially subjected to flash distillation, gas stripping, centrifugation, and washing treatment to obtain an intermediate product; (4) post-treatment: the intermediate product obtained in step (3) is subjected to distillation under reduced pressure to separate the unreacted α-olefin raw material and α-olefin dimers, and the remaining heavy fractions are subjected to hydrogenation saturation treatment followed by fractionation and cutting-off to obtain poly-α-olefin synthetic oils of different viscosity grades. The present invention has a simple process, with simple operation and mild process conditions, and the operating cost can be reduced.

Catalyst for Synthesizing 1-Hexene from Ethylene Trimerization and Application Thereof

A catalyst for synthesizing 1-hexene from ethylene trimerization and its application are provided. Said catalyst consists of (a) the compound containing P and N, (b) electron donor, (c) Cr compound, (d) carrier and (e) accelerator. The molar ratio of (a), (b), (c), (d) and (e) is 0.5-100:0.5-100:1:0.5-10:50-5000. The catalyst is prepared by mixing the components of (a)-(e) in an ethylene trimerization apparatus in situ and ethylene is introduced into the apparatus continuously. The prepared catalyst can be used to synthesize 1-hexene from ethylene trimerization in the inert solvents. The trimerization is performed at 30-150° C. and 0.5-10.0 MPa for 0.1-4 hours. The catalyst has high catalytic activity and high 1-hexene selectivity. During the process of ethylene trimerization, by-product polyethylene does not stick to the apparatus. 23-. (canceled)4: The catalyst of claim 1 , wherein the electron donor (b) is of 1 claim 1 ,4-dichlorobenzene claim 1 , 1 claim 1 ,1 claim 1 ,2-trichloroethane claim 1 , 1 claim 1 ,1 claim 1 ,2 claim 1 ,2-tetrachloroethane claim 1 , 1 claim 1 ,1 claim 1 ,2 claim 1 ,2-tetrabromoethane claim 1 , 1 claim 1 ,2-dichlorethane claim 1 , 1 claim 1 ,2-dimethoxyethane claim 1 , chlorobenzene claim 1 , 1 claim 1 ,2-dichlorobenzene claim 1 , 1 claim 1 ,3-dichlorobenzene claim 1 , and/or 1 claim 1 ,4-dichlorobenzene5: The catalyst of claim 1 , wherein the Cr compound (c) is chromium isooctoate claim 1 , chromium chloride tetrahydrofuran claim 1 , chromium 2-ethylhexanoate claim 1 , and/or chromium acetylacetonate6: The catalyst of claim 1 , wherein the carrier (d) is SiO.7: The catalyst of claim 1 , wherein the accelerator (e) is trimethyl aluminium claim 1 , triethyl aluminium claim 1 , tripropyl aluminium claim 1 , tributyl aluminium claim 1 , and/or triisobutyl aluminium8: The catalyst of claim 1 , wherein the molar ratio is 1-80:1-70:1:1-8:100-4000.10: The catalyst of claim 9 , wherein in compound (a) R claim 9 , R claim 9 , Rand Rare phenyl and ...

Method for synthesis of 1-decene oligomer

A method for synthesis of 1-decene oligomer is provided, wherein 1-decene is polymerized at 80-120° C., 0.8-1.4 MPa in the presence of aluminum trichloride catalyst supported on gamma-alumina and n-hexane solvent where the volume ratio of 1-decene to n-hexane is 3:8-4:1. The catalyst is treated as follows: impregnating gamma-alumina carrier in 0.5-2.0 M of hydrochloric acid, sulfuric acid, nitric acid or mixtures thereof, then vacuum drying at 80-100° C. and calcining at 400-800° C.; dissolving 5-10 g of anhydrous aluminum trichloride in 100 ml of tetrachloromethane, trichloromethane or dichloromethane solvent; adding the obtained solution into 10-20 g of activated alumina carrier and obtaining the catalyst after vacuum drying. The conversion of 1-decene is 50 wt % or more. The oligomer has a kinematic viscosity at 40° C. of 6.0-25 mm 2 /s and a viscosity index of 160-262.

METHOD FOR SYNTHESIS OF 1-DECENE OLIGOMER

A method for synthesis of 1-decene oligomer is provided, wherein 1-decene is polymerized at 80-120° C., 0.8-1.4 MPa in the presence of aluminum trichloride catalyst supported on gamma-alumina and n-hexane solvent where the volume ratio of 1-decene to n-hexane is 3:8-4:1. The catalyst is treated as follows: impregnating gamma-alumina carrier in 0.5-2.0 mol of hydrochloric acid, sulfuric acid, nitric acid or mixtures thereof, then vacuum drying at 80-100° C. and calcining at 400-800° C.; dissolving 5-10 g of anhydrous aluminum trichloride in 100 ml of tetrachloromethane, trichloromethane or dichloromethane solvent; adding the obtained solution into 10-20 g of activated alumina carrier and obtaining the catalyst after vacuum drying. The conversion rate of 1-decene is 50 wt % or more. The oligomer has a kinematic viscosity at 40° C. of 6.0-25 mm2/s and a viscosity index of 160-262. 1the catalyst is treated as follows:first impregnating gamma-alumina carrier in a form of sphere or strip in 0.5-2.0 mol of hydrochloric acid, sulfuric acid, nitric acid or mixtures thereof for 4-12 hours, then vacuum drying at 80-100° C. for 2-12 hours and finally calcining at 400-800° C. for 6-16 hours; anddissolving 5-10 g of anhydrous aluminum trichloride in 100 ml of tetrachloromethane, trichloromethane or dichloromethane organic solvent to form a solution; adding the obtained solution into 10-20 g of activated alumina carrier, keeping at reflex temperature for 6-24 hours, removing solvent, washing with n-hexane, vacuum drying and then obtaining the catalyst.. A method for synthesis of 1-decene oligomer, wherein aluminum trichloride supported on gamma-alumina is used as catalyst, n-hexane is used as solvent, the volume ratio of 1-decene to n-hexane is 3:8-4:1, reaction is undergone under pressure of 0.8-1.4 MPa at temperature of 80-120° C. for 5-6 hours, then the reaction is stopped, the catalyst is filtered, n-hexane solvent is removed by atmospheric distillation, unreacted monomer 1- ...

Method for treating or preventing radiation damage

Disclosed in the present invention is new use of saturated amine compounds for use in preparing medicines to resist radiation damage and promoting regeneration and repair of radiation-damaged tissues.

Catalyst composition for ethylene oligomerization and the use thereof

The present invention relates to a catalyst composition for ethylene oligomerization and the use thereof. Such catalyst composition includes chromium compound, ligand containing P and N, activator and accelerator; wherein the chromium compound is selected from the group consisting of acetyl acetone chromium, THF-chromium chloride and/or Cr(2-ethylhecanoate) 3 ; general formula of the ligand containing P and N is shown as: in which R 1 , R 2 , R 3 and R 4 are phenyl, benzyl, or naphthyl. R 5 is isopropyl, butyl, cyclopropyl, cyclopentyl, cyclohexyl or fluorenyl; the activatior is methyl aluminoxane, ethyl aluminoxane, propyl aluminoxane and/or butyl aluminoxane; general formula of the accelerator is X 1 R 6 X 2 , in which X 1 and X 2 are F, Cl, Br, I or alkoxyl, R 6 is alkyl or aryl; the molar ratio of a, b, c and d is 1:0.5˜10:50˜3000:0.5˜10. After mixing the four components mentioned previously under nitrogen atmosphere for 10 minutes, they are incorporated to the reactor, or these four components are incorporated directly into the reactor. Then ethylene is introduced for oligomerization. Such catalyst can be used in producing 1-octene through ethylene oligomerization. It is advantageous in high catalysing activity, high 1-octene selectivity, etc. The catalytic activity is more than 1.0×10 6 g product·mol −1 Cr ·h −1 , the fraction of C 8 linear α-olefin is more than 70% by mass.

KNIT FASTENER LOOP PRODUCTS

A method of making a loop fastener product features knitting, such as by circular knitting, a pile yarn and one or more ground yarns to form a stretchable knit fabric having loops of the pile yarn extending from a knit ground, with the ground yarns including polymers of differing melt temperatures. The knit fabric is then held in a desired state while the fabric is set by first applying sufficient heat to cause the lower melt temperature resin to flow into interstices of the fabric ground, and then allowing the fabric to cool. The cooled fabric ground is less stretchable in two orthogonal directions after setting than before setting, has a greater air permeability after setting than before setting, and has hook-engageable pile loops extending from bound interstices.

Method and catalyst for selective oligomerization of ethylene

The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C10+.

Knit fastener loop products

A method of making a loop fastener product features knitting, such as by circular knitting, a pile yarn and one or more ground yarns to form a stretchable knit fabric having loops of the pile yarn extending from a knit ground, with the ground yarns including polymers of differing melt temperatures. The knit fabric is then held in a desired state while the fabric is set by first applying sufficient heat to cause the lower melt temperature resin to flow into interstices of the fabric ground, and then allowing the fabric to cool. The cooled fabric ground is less stretchable in two orthogonal directions after setting than before setting, has a greater air permeability after setting than before setting, and has hook-engageable pile loops extending from bound interstices.

Low viscosity poly-a-olefin lubricating oil and synthesis method thereof

The present invention provides a low viscosity poly-α-olefin lubricating oil and a synthesis method thereof. The method comprises: (1) the α-olefin raw material is subjected to dehydration treatment so that the water content in the raw material is ≤10 ppm; (2) a reaction of the dehydration treated α-olefin raw material is carried out in the presence of a complex catalyst and gaseous BF3to obtain a reaction product, wherein the pressure of the gaseous BF3is 0.01 to 1 MPa; (3) the reaction product obtained in step (2) is sequentially subjected to flash distillation, gas stripping, centrifugation, and washing treatment to obtain an intermediate product; (4) the intermediate product obtained in step (3) is subjected to distillation under reduced pressure to separate the unreacted α-olefin raw material and α-olefin dimers, and the remaining heavy fractions are subjected to hydrogenation saturation treatment followed by fractionation and cutting-off.

METHOD AND APPARATUS FOR PREDICTING BLOOD PRESSURE BY FUSING CALIBRATED PHOTOPLETHYSMOGRAPHIC SIGNAL DATA

a method for predicting blood pressure by fusing calibrated photoplethysmography (PPG) signal data includes obtaining real-time PPG signal data, calibrated PPG signal data, calibrated diastolic blood pressure data, and systolic blood pressure data; using a CNN+ANN model to calculate the relative blood pressure data, and generating an ANN output tensor, according to the calibrated diastolic blood pressure and systolic blood pressure data, and the ANN output tensor, performing blood pressure data calculation and generating a blood pressure tensor; if the predicted type information is a first type, performing a mean value calculation according to the blood pressure tensor, and generating diastolic blood pressure prediction data and systolic blood pressure prediction data; if the predicted type information is a second type, performing data extraction processing on the blood pressure tensor, and generating a diastolic blood pressure prediction data sequence and a systolic blood pressure prediction data sequence.

Catalyst composition for ethylene oligomerization and the use thereof

The present invention relates to a catalyst composition for ethylene oligomerization and the use thereof. Such catalyst composition includes chromium compound, ligand containing P and N, activator and accelerator; wherein the chromium compound is selected from the group consisting of acetyl acetone chromium, THF-chromium chloride and Cr(2-ethylhecanoate)3; general formula of the ligand containing P and N is shown as: in which R1, R2, R3 and R4 are phenyl, benzyl, or naphthyl. R5 is isopropyl, butyl, cyclopropyl, cyclopentyl, cyclohexyl or fluorenyl; the activatior is methyl aluminoxane, ethyl aluminoxane, propyl aluminoxane and/or butyl aluminoxane; the accelerator is selected from the group consisting of 1,1,2,2,-tetrachloroethane, 1,1,2,2-tetrabromoethane, 1,1,2,2-tetrafluoroethane, and compounds having a formula of X1R6X2, in which X1 and X2 are F, Cl, Br, I or alkoxyl, R6 is alkylene or arylene group; the molar ratio of chromium compound, ligand containing P and N, activator and accelerator ...

Catalyst or synthesizing 1-hexene from ethylene trimerization and application thereof

A catalyst for synthesizing 1-hexene from ethylene trimerization and its application are provided. Said catalyst consists of (a) the compound containing P and N, (b) electron donor, (c) Cr compound, (d) carrier and (e) accelerator. The molar ratio of (a), (b), (c), (d) and (e) is 0.5-100:0.5-100:1:0.5-10:50-5000. The catalyst is prepared by mixing the components of (a)-(e) in an ethylene trimerization apparatus in situ and ethylene is introduced into the apparatus continuously. The prepared catalyst can be used to synthesize 1-hexene from ethylene trimerization in the inert solvents. The trimerization is performed at 30-150° C. and 0.5-10.0 MPa for 0.1-4 hours. The catalyst has high catalytic activity and high 1-hexene selectivity. During the process of ethylene trimerization, by-product polyethylene does not stick to the apparatus.

Method for Preparing 1-Octene by Oligomerization of Ethylene

Disclosed is a method for preparing 1-octene in the presence of a catalyst system for ethylene oligomerization, which includes: premixing a part of ethylene gas as raw material with a solvent, mixing with the components a+b, c and d of the catalyst system, and then sending in a reactor; directly sending the rest of ethylene gas in the reactor; discharging the resultant liquid from the upper part of the reactor into an overflow channel; adding a catalysis stopping agent to the overflow channel; and then separating the resultant liquid. The advantages of the method are high selectivity of 1-octene and high catalytic activity. 2. The method for preparing 1-octene through ethylene oligomerization according to claim 1 , wherein claim 1 , the premixer is one or more stainless steel pipes having a length to diameter ratio of greater than 20 or a stainless steel autoclave claim 1 , in which a filler may be filled.3. The method for preparing 1-octene through ethylene oligomerization according to claim 1 , wherein claim 1 , the gas distributor is a stainless steel pipe having some pores opened at the middle part claim 1 , and the diameter of the pores is 0.2%-90% of the diameter of the stainless steel pipe.4. The method for preparing 1-octene through ethylene oligomerization according to claim 3 , wherein claim 3 , the diameter of the pores on the gas distributor is 5%-70% of the diameter of the stainless steel pipe.5. The method for preparing 1-octene through ethylene oligomerization according to claim 1 , wherein claim 1 , the ratio of the weight flow of ethylene fed into the premixer to the total weight flow of ethylene fed into the reactor is 20-90%.6. The method for preparing 1-octene through ethylene oligomerization according to claim 1 , wherein claim 1 , the inlet amount of the catalyst and the solvent satisfies the condition that the concentration of the component a of the catalyst in the reactor is 1-10 ppm. 1. Technical FieldThe present invention relates to a ...

KNIT FASTENER LOOP PRODUCTS

A method of making a loop fastener product features knitting, such as by circular knitting, a pile yarn and one or more ground yarns to form a stretchable knit fabric having loops of the pile yarn extending from a knit ground, with the ground yarns including polymers of differing melt temperatures. The knit fabric is then held in a desired state while the fabric is set by first applying sufficient heat to cause the lower melt temperature resin to flow into interstices of the fabric ground, and then allowing the fabric to cool. The cooled fabric ground is less stretchable in two orthogonal directions after setting than before setting, has a greater air permeability after setting than before setting, and has hook-engageable pile loops extending from bound interstices. 1. A method of making a loop fastener product , the method comprising knitting a pile yarn and one or more ground yarns to form a stretchable knit fabric having loops of the pile yarn extending from a knit ground , wherein at least one of the ground yarns comprises a bicomponent yarn with a filament comprising a first portion of a first polymer and a second portion of a second polymer , the first and second portions bonded together along a length of the filament and defining a boundary between the first and second polymers;holding the knit fabric in a flat state; andwhile the fabric is held, setting the fabric by first applying sufficient heat to cause resin of the sheath of the bicomponent yarn filament to flow into interstices of the fabric ground, and then allowing the fabric to cool, such that the cooled fabric ground is less stretchable in two orthogonal directions after setting than before setting, the cooled fabric has a greater air permeability after setting than before setting, and has hook-engageable pile loops extending from interstices bound by the first polymer.2. The method of claim 1 , wherein knitting the pile yarn and one or more ground yarns comprises circular knitting.3. The method of ...

Low viscosity poly-a-olefin lubricating oil and synthesis method thereof

The present invention provides a low viscosity poly-α-olefin lubricating oil and a synthesis method thereof. The method comprises: (1) the α-olefin raw material is subjected to dehydration treatment so that the water content in the raw material is ≤10 ppm; (2) a reaction of the dehydration treated α-olefin raw material is carried out in the presence of a complex catalyst and gaseous BF3 to obtain a reaction product, wherein the pressure of the gaseous BF3 is 0.01 to 1 MPa; (3) the reaction product obtained in step (2) is sequentially subjected to flash distillation, gas stripping, centrifugation, and washing treatment to obtain an intermediate product; (4) the intermediate product obtained in step (3) is subjected to distillation under reduced pressure to separate the unreacted α-olefin raw material and α-olefin dimers, and the remaining heavy fractions are subjected to hydrogenation saturation treatment followed by fractionation and cutting-off.

Method for treating or preventing radiation damage

Disclosed in the present invention is new use of saturated amine compounds for use in preparing medicines to resist radiation damage and promoting regeneration and repair of radiation-damaged tissues. 110-. (canceled)12. The method of claim 11 , wherein Ris CH claim 11 , Ris CH claim 11 , and the saturated amines compound is tris(2-(dimethylamino)ethyl)amine.13. The method of claim 11 , wherein Ris H claim 11 , Ris H claim 11 , and the saturated amines compound is N1 claim 11 ,N1-bis(2-aminoethyl)ethane-1 claim 11 ,2-diamine.14. The method of claim 11 , wherein Ris H claim 11 , Ris CH claim 11 , and the saturated amines compound is N1-methyl-N2 claim 11 ,N2-bis(2-(methylamino)ethyl)ethane-1 claim 11 ,2-diamine.15. The method of claim 11 , wherein Ris H claim 11 , Ris CHCH claim 11 , and the saturated amines compound is N1-ethyl-N2 claim 11 ,N2-bis(2-(ethylamino)ethyl)ethane-1 claim 11 ,2-diamine.16. The method of claim 11 , wherein Ris CHCH claim 11 , Ris CHCH claim 11 , and the saturated amines compound is N1 claim 11 ,N1-bis(2-(diethylamino)ethyl)-N2 claim 11 ,N2-diethyl-diamine.17. The method of claim 11 , further comprising a step of forming the saturated amines compound in a form of an injection.18. The method of claim 17 , wherein a solvent of the injection is TE buffer with pH from 7.5 to 8.5 claim 17 , physiological saline claim 17 , phosphate buffer saline (PBS) or a sterilized distilled water.19. The method of claim 11 , wherein the saturated amines compound is in a form of sulfate or hydrochlorate. The present disclosure relates to a new use of a compound, in specific to a use of a saturated amines compound in preparation of a medicament for resisting a radiation damage or improving regeneration and repair of a radiation-damaged tissue.With the development of society, the development of an atomic energy has brought lots of convenience for national defense and human lives. However, nuclear radiation brings a significant danger and potential security risk ...

Method and catalyst for selective oligomerization of ethylene

The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C10+.

Method and catalyst for selective oligomerization of ethylene

The present invention provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of l:0.5-100:0.1-5000. The present invention also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene of the present invention has high catalytic activity, high selectivity for the target products l-hexene and l-octene, and low selectivity for l-butene and 1-C10+.

A method of producing ethylene by using refinery C4

A method of producing ethylene by using refinery C4 comprising: a refinery C4 as a first raw material which comprises 45%-55% isobutane, 5%-10% n-butane, 15%-20% isobutene, 10%-15% 1-butylene and 5%-10% 2-butylene based on the total weight percentage of the refinery C4, the weight average molecular weight thereof being 55-60, an alkane-rich light hydrocarbon as a second raw material which comprises 40%-50% linear alkane, 25%-35% branched alkane, 15%-25% cyclane, less than or equal to 1% alkene and less than or equal to 10% arene based on the total weight percentage of the alkane-rich light hydrocarbon, the weight average molecular weight thereof being 90-100; the refinery C4 being in amount of about 10% to about 30% of the total weight percentage of the refinery C4 and alkane-rich light hydrocarbon; introducing the mixture of said first raw material and said second raw material into the upper part of the convection section of a cracking furnace, after diluted with steam, passing the diluted mixture through the lower part of the convection section to enter into the radiation section of said cracking furnace, distributing the diluted mixture to manifolds to carry out copyrolysis reaction therein so as to produce ethylene, wherein the cracking temperature is about 840°C to about 860°C, and the dilution ratio of steam/total raw materials is about 0.30 to about 0.60 wt/wt. According to the method provided in the present invention, the yield of ethylene attributed to the refinery C4 of the total raw materials can be greatly increased as compared with the separate cracking of refinery C4, while the cracking performance of light hydrocarbon can be maintained. In this way, the use value of refinery C4 and also other C4-rich products can be effectively improved, thus notable economic bendfits can be brought to the oil refinery.

A method of producing ethylene by using refinery C4

Use of saturated amine compounds in preparing medicines to resist radiation damage and promote regeneration and repair of radiation-damaged tissues

Disclosed in the present invention is new use of saturated amine compounds for use in preparing medicines to resist radiation damage and promoting regeneration and repair of radiation-damaged tissues. Experiments show that the saturated amine compounds can increase the counts of white blood cells (WBC), red blood cells (RBC) and platelets (PLT) in the peripheral blood of radiation-damaged animals, promote multiplication of bone marrow hematopoietic stem/progenitor cells and restoration of the hematopoietic system, and bring favorable reparative effects to the intestinal, hepatic and pulmonary tissues of radiation-damaged mice, thus significantly improving the survival rate of radiation-damaged animals.

Method and device for generating photoplethysmography signal

Method and device for generating photoplethysmography signal

The embodiments of the invention relate to a method and device for generating PPG signals. The method comprises: photographing a skin surface to generate cached fragment video data; extracting cached fragment frame images from the cached fragment video data; performing image quality detection on the cached fragment frame images to generate an image quality detection result; when the image quality detection result indicates an up-to-standard image, performing one-dimensional red and green light signal extraction on the cached fragment frame images to generate first red and green digital signals; performing signal band-pass filtering preprocessing on the first red and green digital signals to generate second red and green digital signals; performing maximum frequency difference determination on the second red and green digital signals to generate a first determination result; when the first determination result indicates an up-to-standard signal, performing signal-to-noise ratio determination on the second red and green digital signals to generate a second determination result; and when the second determination result indicates an up-to-standard signal, generating a first PPG signal.

Method and apparatus for predicting blood pressure by fusing calibrated photoplethysmographic signal data

Provided are a method for predicting blood pressure by fusing calibrated photoplethysmography (PPG) signal data, and an apparatus, electronic device, computer program product, and computer storage medium corresponding to the method. The method comprises: obtaining real-time PPG signal data, calibrated PPG signal data, calibrated diastolic blood pressure data, and systolic blood pressure data; according to the real-time and calibrated PPG signal data, using a CNN+ANN model to calculate the relative blood pres- sure data, and generating an ANN output two-dimensional tensor, according to the calibrated diastolic blood pressure and systolic blood pressure data, and the ANN output two-dimensional tensor, performing blood pressure data calculation and generating a blood pressure two-dimensional tensor; if the predicted type information is a first type, then performing a mean value calculation according to the blood pressure two-dimensional tensor, and generating diastolic blood pressure prediction data and systolic blood pressure prediction data; if the predicted type information is a second type, then performing data extraction processing on the blood pressure two-dimensional tensor, and generating a diastolic blood pressure prediction data sequence and a systolic blood pressure prediction data sequence. The method can improve the prediction accuracy of an artificial-intelligence blood pressure prediction network.

Video data-based system for blood pressure prediction

A video data-based system for blood pressure prediction. The video data-based system for blood pressure prediction comprises: a first device and a cloud server, where the first device comprises a first master control module, a first camera, a lighting module, a display screen, and a first communication; the cloud server comprises a second master control module, a validity validation module, a parameter validation module, a data preprocessing module, an artificial intelligence blood pressure prediction module, and a second communication module. The use of the video data-based system for blood pressure prediction provided in the embodiments of the present disclosure obviates the need to wear any specific collecting device for the real-time detection and continuous monitoring of the blood pressure, thus reducing the difficulty of implementing the real-time detection and monitoring of a test subject, and enriching the application scenarios of photoplethysmography in the field of guardianship.

一种横梁货架

本实用新型公开了一种横梁货架，属于货架技术领域，包括支撑立柱以及与支撑立柱通过螺钉固定连接的横梁，横梁的内侧下端设置有固定凸块A，两个相对固定凸块A之间设置有若干个均匀分布的支撑杆，两个相对横梁之间设置有设置在支撑杆上的货架板，货架板的底端设置有与固定凸块A相互配合的固定凸块B，货架板的内部设置有若干个均匀分布的凸形孔，货架板上活动连接有分隔板，分隔板的底端设置有与凸形孔相互配合的凸形插板，支撑立柱上设置有若干对与螺钉配合使用的螺钉孔。本实用新型，通过多货架板进行有效分隔以及货架的高度进行调节，从而达到多货架有效合理分配以及对货架的最优化使用的目的。

Blood glucose prediction method and device based on optical signal features and metabolic thermal features

A blood glucose prediction method and device based on optical signal features and metabolic heat features. The method comprises: acquiring first calibrated blood glucose data (1); acquiring and generating first, second, third and fourth optical signals (2); acquiring and generating first, second, third, fourth, fifth, sixth and seventh metabolic heat signals (3); extracting and normalizing human body optical signal features to generate first, second and third optical feature data groups (4); extracting and normalizing environmental optical signal features to generate fourth optical feature data (5); extracting and normalizing metabolic heat features to generate first, second, third, fourth, fifth, sixth and seventh metabolic heat feature data (6); performing feature fusion to generate a first feature vector (7); predicting, on the basis of a floating blood glucose prediction model, floating blood glucose values to generate first floating blood glucose data (8); and generating first predicted blood glucose data according to the sum of the first calibrated blood glucose data and the first floating blood glucose data (9). The blood glucose prediction method and device based on optical signal features and metabolic heat features can be used to provide a non-invasive blood glucose measurement mechanism.

Video data-based system for blood pressure prediction