Abstract: The invention relates to a polyamide compound and a use thereof. Specifically, the invention relates to a type of polyamide compound (which preferably comprise one or more amide bonds formed by condensation of same or different L-amino acids or D-amino acids), or stereoisomers, crystalline polymorphs, solvates, metabolites, prodrugs or pharmaceutically acceptable salts or esters thereof, or pharmaceutical compositions thereof, as well as a method for preparing the polyamide compound and a use thereof in the prevention or treatment of diseases associated with ?-opioid receptor. The polyamide compound of the invention has excellent ?-opioid receptor agonistic activity and hydrophilicity, thus having a lesser ability of penetrating the blood-brain barrier and a lower capacity for entering the brain.

Abstract: The present invention relates to a novel compound of 4?-thionucleoside, a preparation method therefor, a pharmaceutical composition comprising the same and an application thereof. Specifically, the present invention relates to a phosphamide derivative of 4?-thionucleoside, a preparation method therefor, a pharmaceutical composition comprising the same, a use thereof in the preparation of a medicine for preventing or treating abnormal cell proliferation diseases (for example, tumors or cancers and related diseases) or virus infectious diseases, and a method of using the same for preventing or treating abnormal cell proliferation diseases (for example, tumors or cancers and related diseases) or virus infectious diseases.

Abstract: Provided is a lithium ion battery including a battery can, a battery core received in the battery can, electrolyte filled in the battery can, and a battery cover assembled to the battery can. The battery can or the battery cover is provided with a pressure relief valve, and the pressure relief valve is coupled with a mesh cover defining a number of through holes therein. According to the present invention, when thermal runaway occurs to the lithium ion battery, the pressure relief valve breaks timely. Only gases and electrolyte vapor can pass through the mesh cover. Solid particles cannot pass through the mesh cover. Therefore, ignition of the flammable gases, the electrolyte vapor and the high temperature solid particles in the surrounding air afar from the pressure relief valve is avoided and the safety performance of the lithium ion battery can be improved remarkably.

Abstract: A printed circuit board includes a first dielectric layer, a first ground layer, a second dielectric layer, a first power layer, a first via hole and a ground hole extending through the printed circuit board. A first signal line is laid on the first dielectric layer. A third signal line is laid on the second dielectric layer. The first and third signal lines are electrically connected to the first via hole. An extending direction of the first signal line on the first dielectric layer is the same as an extending direction of the third signal line is laid on the second dielectric layer. A first void area is defined in the first ground layer around the first via hole. A second void area is defined in the first power layer around the first via hole. The ground hole is outside the first void area and the second void area.

Abstract: A detection method of nucleic acid is provided. The method includes: providing nucleic acid to be tested, making the nucleic acid to be tested react under asymmetric PCR conditions with a pair of primers for target nucleic acid amplification, DNA polymerase, adenine deoxyribonucleotide, guanine deoxyribonucleotide, cytosine deoxyribonucleotide and thymidine deoxyribonucleotide in a PCR buffer solution, mixing the reaction product and liquid that contains probe molecules, and judging whether the nucleic acid to be tested contains the target nucleic acid by observing the obtained mixture color or color change. A kit is also provided that can be used in the nucleic acid detection by the said method. Application of the method and the kit in inspection and quarantine is also provided. The method is a quick and easy, sensitive and a specific detection method of nucleic acid with direct observation using naked eyes. The method does not need additional equipment.

Abstract: The present application provides a rechargeable battery including a battery case and a battery cap coupled to the battery case. The battery cap includes a conductive cap plate; a first electrode electrically connected to the cap plate; a second electrode insulatively connected to the cap plate, the second electrode being in electrical connection with one end of a conductive plate for securing the second electrode to the conductive cap plate; and a conductive turnover component in electrical connection with the conductive cap plate, the turnover component being initially separated from the conductive plate and capable deforming to contact other end of the conductive plate due to high pressure in the battery case, so as to short-circuit the first electrode and the second electrode.

Abstract: A battery pack has series-parallel connected battery cells. An inrush current limiting circuit has current limiting devices and a current limiting tracking means limits inrush current from shorted battery cells. Each current limiting tracking means is coupled to the current limiting devices such that they limit an inrush current from parallel neighbor battery cells when one battery cell on the column shorts. The current limiting devices are variable buffer resistors with a positive temperature coefficient. The current limiting tracking means are heat sinks that thermally couples the buffer resistors together such that the buffer resistors increase in resistance with a temperature increase caused by current flowing through the buffer resistor associated with the shorted battery cell. Current regulating elements are in series with columns of battery cells for preventing inrush current to the columns of the battery cells.

Abstract: A printed circuit board includes a first dielectric layer, a first ground layer, a second dielectric layer, a first power layer, a first via hole and a ground hole extending through the printed circuit board. A first signal line is laid on the first dielectric layer. A third signal line is laid on the second dielectric layer. The first and third signal lines are electrically connected to the first via hole. An extending direction of the first signal line on the first dielectric layer is the same as an extending direction of the third signal line is laid on the second dielectric layer. A first void area is defined in the first ground layer around the first via hole. A second void area is defined in the first power layer around the first via hole. The ground hole is outside the first void area and the second void area.

Abstract: A method and associated systems for representing multidimensionality of a data table by combining a first set of data elements, units, or cells of the table into a multidimensional, expandable, second data unit. One or more processors of a computer system: determine a set of a first data units to be combined; determine a type of multidimensionality of the second data unit after combination; and combine, as a function of the type of multidimensionality, the first set of the first data units into the second data unit. The type of multidimensionality may be horizontal, vertical, or higher-dimensional (that is, greater than two-dimensional) dimensionality.

Abstract: A printed circuit board includes a first dielectric layer, a first ground layer, a second dielectric layer, a first power layer, a first via hole, and a first ground hole. A first signal line is laid on the first dielectric layer. A third signal line is laid on the second dielectric layer. The first and third signal lines are electrically connected to the first via hole. An extending direction of the first signal line on the first dielectric layer is opposite to an extending direction of the third signal line is laid on the second dielectric layer. A first void area is defined in the first ground layer around the first via hole. A second void area is defined in the first power layer around the first via hole. The first ground hole is outside the first void area and the second void area.

Abstract: Provided is a lithium ion battery including a battery can, a battery core received in the battery can, electrolyte filled in the battery can, and a battery cover assembled to the battery can. The battery can or the battery cover is provided with a pressure relief valve, and the pressure relief valve is coupled with a mesh cover defining a number of through holes therein. According to the present invention, when thermal runaway occurs to the lithium ion battery, the pressure relief valve breaks timely. Only gases and electrolyte vapor can pass through the mesh cover. Solid particles cannot pass through the mesh cover. Therefore, ignition of the flammable gases, the electrolyte vapor and the high temperature solid particles in the surrounding air afar from the pressure relief valve is avoided and the safety performance of the lithium ion battery can be improved remarkably.

Abstract: The present application provides a rechargeable battery including a battery case and a battery cap coupled to the battery case. The battery cap includes a conductive cap plate; a first electrode electrically connected to the cap plate; a second electrode insulatively connected to the cap plate, the second electrode being in electrical connection with one end of a conductive plate for securing the second electrode to the conductive cap plate; and a conductive turnover component in electrical connection with the conductive cap plate, the turnover component being initially separated from the conductive plate and capable deforming to contact other end of the conductive plate due to high pressure in the battery case, so as to short-circuit the first electrode and the second electrode.

Abstract: The present invention provides a lithium ion battery including a battery can, a battery cell received in the battery can, electrolyte filled in the battery can, and a battery cover sealing the battery can. The battery can is formed with a flange portion, and the battery cover is formed with a skirt portion corresponding to the flange portion. The skirt portion of the battery cover tightly wraps the flange portion of the battery can, and the skirt portion and the flange portion wrapped in the skirt portion are tightly wound and bent to the battery can, so as to realize desirable sealing between the battery can and the battery cover.

Abstract: A detection method of nucleic acid is provided. The method includes: providing nucleic acid to be tested, making the nucleic acid to be tested react under asymmetric PCR conditions with a pair of primers for target nucleic acid amplification, DNA polymerase, adenine deoxyribonucleotide, guanine deoxyribonucleotide, cytosine deoxyribonucleotide and thymidine deoxyribonucleotide in a PCR buffer solution, mixing the reaction product and liquid that contains probe molecules, and judging whether the nucleic acid to be tested contains the target nucleic acid by observing the obtained mixture color or color change. A kit is also provided that can be used in the nucleic acid detection by the said method. Application of the method and the kit in inspection and quarantine is also provided. The method is a quick and easy, sensitive and a specific detection method of nucleic acid with direct observation using naked eyes. The method does not need additional equipment.

Abstract: An explosion-proof device for use in power batteries includes a battery cover defining an explosion-proof hole, a valve seat securely mounted in the explosion-proof hole and hermetically sealing the battery cover, and a rupture film positioned in the valve seat and hermetically sealing the explosion-proof hole. The rupture film is insulatively isolated from the valve seat via an insulative cushion enclosing the rupture film, or an insulative layer formed on the rupture film. In the explosion-proof device of the prevent invention, the rupture film is insulatively isolated from the valve seat, which can prevent the rupture film from being electrochemically corroded.

Abstract: A battery pack has series-parallel connected battery cells. An inrush current limiting circuit has current limiting devices and a current limiting tracking means limits inrush current from shorted battery cells. Each current limiting tracking means is coupled to the current limiting devices such that they limit an inrush current from parallel neighbor battery cells when one battery cell on the column shorts. The current limiting devices are variable buffer resistors with a positive temperature coefficient. The current limiting tracking means are heat sinks that thermally couples the buffer resistors together such that the buffer resistors increase in resistance with a temperature increase caused by current flowing through the buffer resistor associated with the shorted battery cell. Current regulating elements are in series with columns of battery cells for preventing inrush current to the columns of the battery cells.

Abstract: The present invention provides a lithium ion battery including a battery can, a battery cell received in the battery can, electrolyte filled in the battery can, and a battery cover sealing the battery can. The battery can is formed with a flange portion, and the battery cover is formed with a skirt portion corresponding to the flange portion. The skirt portion of the battery cover tightly wraps the flange portion of the battery can, and the skirt portion and the flange portion wrapped in the skirt portion are tightly wound and bent to the battery can, so as to realize desirable sealing between the battery can and the battery cover.

Abstract: An explosion-proof device for use in power batteries includes a battery cover defining an explosion-proof hole, a valve seat securely mounted in the explosion-proof hole and hermetically sealing the battery cover, and a rupture film positioned in the valve seat and hermetically sealing the explosion-proof hole. The rupture film is insulatively isolated from the valve seat via an insulative cushion enclosing the rupture film, or an insulative layer formed on the rupture film. In the explosion-proof device of the prevent invention, the rupture film is insulatively isolated from the valve seat, which can prevent the rupture film from being electrochemically corroded.

Abstract: A center backfire inner heat regenerative energy saving high efficiency furnace and tank integration reduction furnace system comprises a furnace section and a heating section. The furnace section includes a reduction tank, a material inlet door, a magnesium crystal collecting machine, and a residue exhaust pipe. The reduction tank includes a tank body, a centre combustion room, and plural fume exhaust pipes. The material inlet door is connected to a material charging room between the center combustion room and the tank body, and the magnesium crystal collecting machine is provided with a crystal cover communicating with the material charging room, and a water recycling condensation equipment outside the crystal cover. The residue exhaust pipe is connected to the material charging room and provided with a residue exhaust door and a water dispersing heat separating cover. The heating section includes a burner connected to the center combustion room.