Abstract: An online measurement method for temperature stability of production layers in an oil and gas well includes: obtaining a plurality of temperature data at each position point of an optical fiber; according to the temperature data, calculating temperature standard deviations of each position point within a production layer at a plurality of time points; performing probability distribution statistics according to the temperature standard deviations at all position points of the production layer at a same time point, fitting a probability distribution curve according to normal distribution, and obtaining a probability density function; obtaining the temperature standard deviations corresponding to at least one value that integral values of the probability density function at all position points of the production layer at each time point is between (0, 1), generating a standard temperature deviation normal distribution probability time curve of each section of the production layer according to the temperature stan

Abstract: A water tank assembly and a heating device are provided. The water tank assembly has a tank body, a main heat exchange pipe assembly and a condenser pipe assembly, and a heat exchange fin assembly. The tank body has a smoke inlet and a smoke outlet. The main heat exchange pipe assembly and the condenser pipe assembly are disposed in the tank body. The main heat exchange pipe assembly has a layer of heat exchange pipes closest to the smoke inlet as a first layer of heat exchange pipes. The heat exchange pipes of the first layer are in communication with each other to form a series of water passageway. The main heat exchange pipe assembly and the condenser pipe assembly at least partially pass through the heat exchange fin assembly.

Abstract: The present invention provides a pluripotent stem cell or a derivative thereof. A first nucleic acid molecule is introduced into a genome of the pluripotent stem cell or the derivative thereof; and a second nucleic acid molecule is introduced to a 3?UTR region of an immune response-related gene in the pluripotent stem cell or the derivative thereof. The first nucleic acid molecule encodes a small nucleic acid molecule that mediates RNA interference, and the small nucleic acid molecule can specifically bind to a transcript product of the second nucleic acid molecule to start an RNA interference program to degrade or silence mRNA of the immune response-related gene, thereby blocking the expression of the immune response-related gene, such that the cell has immunological compatibility, and thus can eliminate or reduce alloimmune rejection responses.

Abstract: Provided is an immunologically compatible and reversible universal pluripotent stem cell or a derivative thereof. An inducible gene expression system and the expression sequence of at least one immunologically compatible molecule are introduced into the genome of the pluripotent stem cell or the derivative thereof. The immunologically compatible molecule is used to regulate the expression of immune response-related genes in the pluripotent stem cell or the derivative thereof. The expression of the immunologically compatible molecule is regulated by the inducible gene expression system. The described method can increase the immunological compatibility between a transplant and a recipient, and can simultaneously reversibly restore the antigen-presenting abilities of transplant cells.

Abstract: An online measurement method for temperature stability of production layers in an oil and gas well includes: obtaining a plurality of temperature data at each position point of an optical fiber; according to the temperature data, calculating temperature standard deviations of each position point within a production layer at a plurality of time points; performing probability distribution statistics according to the temperature standard deviations at all position points of the production layer at a same time point, fitting a probability distribution curve according to normal distribution, and obtaining a probability density function; obtaining the temperature standard deviations corresponding to at least one value that integral values of the probability density function at all position points of the production layer at each time point is between (0, 1), generating a standard temperature deviation normal distribution probability time curve of each section of the production layer according to the temperature stan

Abstract: A temperature measuring method of distributed multi-section optical fibers, a system and a storage medium are provided.

Abstract: The present invention relates to a non-viral iPSCs induction method as well as the compositions, kits and iPSCs obtained therefrom. More specifically, the induction method comprises the following steps: 1) Constructing a recombinant plasmid by introducing the DNA sequences expressing the reprogramming factors POU5F1, SOX2, GLIS1, KLF4, MYCL and hsa-miR-302s into an episomal vector; 2) Obtaining iPSCs by introducing the recombinant plasmids obtained in step 1) into human somatic cells, and reprogramming induction culture of the cells. The method reduces the risk of clinical applications of iPSCs by using a combination of highly-safe reprogramming factors without the introduction of high-risk reprogramming factors such as c-MYC, SV40-LT and TP53 inhibitors; The method is highly applicable.

Abstract: The present invention relates to a non-viral iPSCs induction method as well as the compositions, kits and iPSCs obtained therefrom. More specifically, the induction method comprises the following steps: 1) Constructing a recombinant plasmid by introducing the DNA sequences expressing the reprogramming factors POU5F1, SOX2, GLIS1, KLF4, MYCL and hsa-miR-302s into an episomal vector; 2) Obtaining iPSCs by introducing the recombinant plasmids obtained in step 1) into human somatic cells, and reprogramming induction culture of the cells. The method reduces the risk of clinical applications of iPSCs by using a combination of highly-safe reprogramming factors without the introduction of high-risk reprogramming factors such as c-MYC, SV40-LT and TP53 inhibitors; The method is highly applicable.

Abstract: A technique includes acquiring dry condition and wet measurements using an optical spectrometer for a plurality of lamp intensities. The technique includes determining candidate maximum optical densities as a function of the lamp intensities based at least in part on a reference measurement that is acquired by the spectrometer, the reference measurement and does not vary with respect to the lamp intensities. The technique includes determining an optical density linear dynamic range based at least in part on the candidate maximum optical densities.

Abstract: A technique includes acquiring dry condition and wet measurements using an optical spectrometer for a plurality of lamp intensities. The technique includes determining candidate maximum optical densities as a function of the lamp intensities based at least in part on a reference measurement that is acquired by the spectrometer, the reference measurement and does not vary with respect to the lamp intensities. The technique includes determining an optical density linear dynamic range based at least in part on the candidate maximum optical densities.

Abstract: The present invention relates to a non-viral iPSCs induction method as well as the compositions, kits and iPSCs obtained therefrom. More specifically, the induction method comprises the following steps: 1) Constructing a recombinant plasmid by introducing the DNA sequences expressing the reprogramming factors POU5F1, SOX2, GLIS1, KLF4, MYCL and hsa-miR-302s into an episomal vector; 2) Obtaining iPSCs by introducing the recombinant plasmids obtained in step 1) into human somatic cells, and reprogramming induction culture of the cells. The method reduces the risk of clinical applications of iPSCs by using a combination of highly-safe reprogramming factors without the introduction of high-risk reprogramming factors such as c-MYC, SV40-LT and TP53 inhibitors; The method is highly applicable.

Abstract: The present invention relates to a non-viral iPSCs induction composition and the kits thereof. Specifically, it comprises a recombinant plasmid, and the recombinant plasmid is obtained by constructing the DNA sequences expressing the reprogramming factors POU5F1, SOX2, GLIS1, KLF4, MYCL and hsa-miR-302s into an episomal vector; The DNA sequence of hsa-miR-302s comprises one or more sequences selected from hsa-miR-302a, hsa-miR-302b, hsa-miR-302c and hsa-miR-302d. The induction composition is suitable for a highly safe and non-integrated induction reprogramming to obtain iPSCs, which reduces the risk of the clinical applications without an introduction of the high-risk reprogramming factors such as c-MYC, SV40-LT and TP53 inhibitors.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: The invention relates to a separation and recovery method for radioactive waste slag and specifically relates to a separation and recovery method for monazite slag. The separation and recovery method comprises the following steps: acid leaching, pressure filtration, water washing, extraction of valuable components and treatment of filtration slag.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: The invention relates to a separation and recovery method for radioactive waste slag and specifically relates to a separation and recovery method for monazite slag. The separation and recovery method comprises the following steps: acid leaching, pressure filtration, water washing, extraction of valuable components and treatment of filtration slag.

Abstract: A telemetry apparatus and method for communicating data from a down-hole location through a borehole to the surface is described including a light source, an optical fiber being placed along the length of the wellbore and receiving light from the light source, a transducer located such as to produce a force field (e.g. a magnetic field) across the optical fiber and its protective hull without mechanical penetration of the hull at the down-hole location, one or more sensors for measuring down-hole conditions and/or parameters, a controller to provide a modulated signal to the magnetic field generator, said modulated signal being under operating conditions representative of measurements by the one or more sensors, and an optical detector adapted to detect changes in the light intensity or polarization of light passing through the fiber.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: A sensing system including a sensor having an enclosure that defines a chamber, a fiber optic segment extending from outside the enclosure into the chamber, and a sequence of optical processing elements within the chamber. The elements include a fiber Bragg grating, a polarizer, a side hole fiber, and a mirror. A light source is arranged to direct light to the sensor(s). A spectral analyzer is arranged to detect light reflected back from the sensor(s). The fiber Bragg grating substantially reflects a first spectral envelope while transmitting the remainder of the optical spectrum to the polarizer and side hole fiber. The polarizer, side hole fiber, and mirror cooperate to return an optical signal within a second spectral envelope. The characteristic wavelength of a peak in the first spectral envelope is highly sensitive to temperature and relatively weakly sensitive to pressure.