167results about How to "Concentration adjustable" patented technology

Hypoxic delivery apparatus producing from ambient air a product gas having a lower levels of oxygen concentration and delivering the product gas to a user of the apparatus in pulse doses. Alternatively, the apparatus may include a selector for alternately delivering either a nitrogen enriched gas or an oxygen enriched gas to the user.

The invention relates to a high-elasticity conductive fiber and a preparation method thereof. The preparation method includes that firstly, elastic yarns are subjected to preprocessing, secondly, a metal nanowire dispersion liquid is used for impregnating and coating the preprocessed elastic yarns and metal nanowires can be adsorbed to the surface of the elastic yarns, and thirdly, the elastic yarns with the metal nanowires adsorbed to the surface are subjected to hydrogen plasma processing or thermal processing.

A method for controlling sheeting in a gas phase reactor that includes producing a polyolefin with at least one metallocene catalyst and at least one static control agent in at least one gas phase reactor, measuring entrainment static using a static probe, and adjusting the concentration of the static control agent in response to changes in the measured entrainment static is disclosed.

The present invention relates to a thermal printer. The thermal printer comprises a stepping motor, a thermal element, a roller driven by the stepping motor to drive thermo-sensitive papers to paper skip and a control module. The control module comprises: a PWM timing controller configured to generate PWM signals to control the rotation of the stepping motor; a serial bus controller configured to control the serial bus to transmit the printing data to the thermal element through the serial bus; a first timing controller configured to generate interruption to start the serial bus to transmit the printing data; and a second timing controller configured to control the heating time of the thermal element. The present invention further relates to a thermal printing method. A PWM timing controller, a first timing controller and a second timing controller are configured to control the printing process, and a thermal printing mode with adjustable printing speed and printing concentration is realized through comparing the counter values of the first timing controller and the second timing controller with the relation of the printing speed and the printing concentration.

The present invention relates to a carbon aerogel precursor, a preparation method thereof and a carbon aerogel prepared thereby and, more particularly, to a carbon aerogel precursor which can be converted into a carbon aerogel that exhibits excellent specific surface area and physical properties by using a binder that has a low carbonization ratio and is capable of performing phase conversion while using a carbon material having physical properties such as diameter, length and the like that are not adjusted, a preparation method thereof, and a carbon aerogel prepared thereby.

The invention provides a test device for researching condensed phase particle collision discipline. The device comprises a test section assembly and a particle generator. Through selecting the outlet area of a speed control piece of the particle generator, the content of metal in a propellant and an included angle of a plurality of particle generators, high temperature and high pressure environment of the condensed phase particle collision in an actual engine can be simulated, simultaneously the parameters such as particle speed, collision angle, particle concentration and the like can be adjustable under the condition that other parameters are unchanged, and the influence of the single parameter such as particle speed, collision angle and particle concentration on the changes of particlediameter before and after the collision can be researched.

The invention discloses a black phosphorus crystal with a high photoelectric response rate as well as a preparation method and application thereof. The black phosphorus crystal with the high photoelectric response rate is a monocrystal, with a space point group Cmca (no.64); lattice parameters are as follows: a=3.2 to 3.4 angstroms, b=10.4 to 10.6 angstroms, c=4.3 to 4.5 angstroms, and interlamellar spacing=4 to 6 angstroms. The preparation method comprises the following steps: placing a growth precursor containing red phosphorus, a mineralizer and a doping element into a sealed reaction container, of which an inner cavity is in a vacuum environment, and performing heating, heat preservation and cooling on the reaction container in sequence, thus growing and forming the black phosphorus crystal. A carrier type and a carrier concentration of the black phosphorus crystal provided by the invention can be adjusted; the black phosphorus crystal can show an extremely high photoelectric response rate without subsequent modification; moreover, the preparation method is simple, low in cost, low in pollution, high in yield, high in product crystallinity and uniform in doping; and the black phosphorus crystal has a wide application prospect in the field of photoelectronic devices.

The invention discloses an NP-type CMOS avalanche photodiode with a deep N-trap. The NP-type CMOS avalanche photodiode comprises a P-type substrate, an N-trap layer and an avalanche area. The N-trap layer and the avalanche area are arranged on the P-type substrate, the avalanche area is arranged between the P-type substrate and the N-trap layer to form a PN junction, a light absorbing layer is further arranged between the P-type substrate and the avalanche area, the light absorbing layer is the deep N-trap arranged on the P-type substrate, and the dosage concentration of the deep N-trap is larger than that of the P-type substrate. By means of the NP-type CMOS avalanche photodiode, the rate, the frequency response and bandwidth of avalanche photodiode devices are improved.

The invention relates to a fruit and vegetable transporting and preserving method by using ozone as well as a fruit and vegetable preserving carriage and a fruit and vegetable preserving vehicle. The fruit and vegetable transporting and preserving method is that the ozone is injected into a thermal-insulating fruit and vegetable storage space with a certain shape and volume and not sealed completely; proper ozone density and proper humidity are remained in the space which is not sealed completely, the humidity is maintained at 50-95 percent and the ozone density is maintained at 3ppm-25ppm. The fruit and vegetable preserving carriage comprises a carriage body; a thermal-insulating layer is arranged on the internal surface of the carriage body; the escape pipe of a preserving machine installed on the external wall of the carriage body is communicated with the intake pipe of an ozone delivery pipe network fixed on the inner surface of the roof plate of the carriage; an electric fan and a fine atomizing spray head are also fixed on the inner surface of the roof plate of the carriage; at least one ventilation silicon window communicated with the carriage body is arranged on the flank of the carriage body. The fruit and vegetable preserving vehicle comprises a fruit and vegetable preserving carriage. The invention provides a fruit and vegetable preserving carriage and a fruit and vegetable preserving vehicle with sound preserving effect and low power consumption.

The invention relates to a moderate oxygen control constant-temperature humidity conditioning storage container which is in a square container body structure. A refrigeration chamber is arranged on one inner side of the storage container body, an equipment chamber is arranged between the refrigeration chamber and the other side in the storage container, a plurality of mist nozzles are mounted at intervals and uniformly distributed on the inner top of the refrigeration chamber, a heat exchanger, a temperature sensor, a pressure sensor, a humidity sensor, an O2 sensor and a CO2 sensor are fixedly mounted on the wall of the equipment chamber in the refrigeration chamber, and a moderate oxygen control device, a refrigerator, a humidity conditioner, an air supply electromagnetic valve and an electronic control unit are mounted in the equipment chamber. The storage container is capable of moderately controlling the concentration of oxygen in the container body besides the constant temperature humidity conditioning function, the low-temperature, high-humidity and oxygen-control integrated container environment can better control respiration intensity of fruits and vegetables, and accordingly refreshment time can be prolonged.

The invention relates to an electrolysis water generator comprising a source water purifying treatment device, a water mixing valve A1, an electromagnetic valve B1, an electromagnetic valve B2, a one-way valve, an acidulous water storage tank, an electrolyzed water tank, a purified water storage tank, an electrolysis subassembly, a water level sensor C1, a TDS sensor, an electromagnetic valve B3, a water level sensor C2, an electromagnetic valve B4, a water mixing valve A2, an alkaline water storage tank, a water level sensor C3, a water level sensor C4, a water level sensor C5 and a water level sensor C6 which are connected with each other through pipelines and connected with a power supply and SCM intelligent control device through electric wires; the using method of the electrolysis water generator comprises the following five steps: water storage, water generation, water accumulation, water intaking and electrolysis subassembly cleaning. The invention can prepare alkaline water and also prepare acidulous water and is suitable for preparing source water in various places, the concentration of the acidulous water / alkaline water is adjustable, and the electrolysis subassembly has simple structure, low cost and convenient cleaning.

The invention relates to a method for truncating sodium titanate nanotubes. The lengths of sodium titanate nanotubes obtained by the prior method are not uniform. The method comprises the concrete steps of: dispersing the sodium titanate nanotubes into water solution of soluble heavy metallic salt; stirring the mixture at normal temperature; performing precipitation separation, washing and drying on the sodium titanate nanotubes absorbed with heavy metal ions; dispersing the obtained product into saturated water solution of disodium ethylene diamine tetraacetate to obtain mixed solution; stirring the mixed solution at normal temperature, and removing the heavy metal ions absorbed in the sodium titanate nanotubes; obtaining a sodium titanate nanotube precipitate after the mixed solution is subjected to centrifugal separation; and obtaining the truncated sodium titanate nanotubes by washing and drying. The lengths of the sodium titanate nanotubes obtained by the truncation are uniform, and can reach 20nm at shortest.

A method for operating an internal combustion engine, in which at least one unwanted exhaust component is reduced, wherein a comparison value of an air ratio is determined and compared with an actual air ratio, and / or a comparison value of an oxygen fraction in an intake pipe is determined and compared with an actual oxygen fraction in the intake pipe, and wherein at least one correction variable is determined in accordance with a result of the comparison for the purpose of correcting at least one variable acting on the actual air ratio and / or the actual oxygen fraction in the intake pipe.

The preparation of Pleurotus tuber-regium polysaccharide functionalized nano-selenium hydrosol with anti-tumor activity includes the following steps: 1) at normal temperature and under normal pressure, adding a Vitamin C solution to an aqueous solution of Pleurotus tuber-regium polysaccharides, and mixing uniformly; 2) adding dropwise a selenium dioxide solution or a selenite solution to the solution while mixing uniformly; and 3) adding water to the solution to a pre-determined volume, to obtain a Pleurotus tuber-regium polysaccharide functionalized nano-selenium hydrosol when the red color of the product is no longer deepened. The polysaccharides are used to control the particle size of nano-selenium, to obtain functionalized nano-elemental selenium with high anti-tumor activity and low toxicity. The anti-tumor activity of the biologically active molecule polysaccharides and the physiological effect of nano-selenium are combined, and a synergistic anti-tumor effect is achieved.

A pressurized flow of breathable gas is delivered to the airway of a subject in accordance with a therapy regimen. The therapy regimen may be designed to maintain oxygenation of the subject. The therapy regimen dictates levels of fraction of inspired oxygen and / or positive end expiratory pressure to maintain a therapeutically beneficial level of oxygenation in a feedback manner. Within the therapy regimen, changes made to fraction of inspired oxygen and / or positive end expiratory pressure automatically and dynamically are constrained by user configured constraints such as the maximum incremental change, amount of time between adjustments, or the maximum rate of change This may provide a level of customization of the automated control of the therapy regime for individual subjects.

Polarizing glass articles and methods of manufacturing polarizing glass articles are disclosed. The method involves forming a polarizing layer on the surface of the glass article by ion-exchanging silver or copper into the surface.

The invention discloses a synchronous heat exchange gas absorption tower, which is a bubble-cap tower. The bottom of the tower is provided with a liquid outlet and a gas inlet; the top of the tower is provided with a tail gas outlet and an absorption liquid outlet; 1 to 3 layers of heat exchange coils are arranged between bubble caps of each layer of tower tray; inlets and outlets of the heat exchange coils are directly communicated with the outside of the tower; and a heat transfer medium flows in the heat exchange coils. The invention also discloses a nitric oxide absorption and concentration process by employing the synchronous heat exchange gas absorption tower. The process comprises the following steps of: mixing a NOX-containing waste gas and air according to the concentration and class of the waste gas in a certain ratio, introducing the mixed gas from the bottom of the absorption tower, introducing water or dilute nitric acid serving as an absorber from the top of the tower, performing countercurrent or crosscurrent contact reaction of the mixed gas and the absorber on each stage of filler or tower plate, timely bringing away reaction heat by using cooling water in the heat exchange coils on each stage of filler and tower plate, ensuring that the NOX concentration in the exhaust tail gas on the top of the absorption tower is 150ppm and the rate is 1kg / h, and obtaining nitric acid with the concentration of 35 to 58 percent at the bottom of the absorption tower.

The invention discloses a method for treating organic waste gas in a chemical plant. The organic waste gas sequentially pass through a flowmeter, a flow regulating valve, a concentration monitor, a dust removal flame-retardant device, an air inlet fan, a heat exchanger, a catalyst chamber, an exhaust fan, an alkaline tower, a humidifier, a biological active packing layer containing scrap iron, a 1# electrode, a 2# electrode, a 3# electrode, a 4# electrode, a circulating water system, a thermostat, a spraying system, a three-way valve and a biological filter. According to the method, the concentration of the organic waste gas can be regulated into a proper concentration range of the waste gas treatment system. According to the method, different waste gas treatment methods can be selected according to the concentration of the organic waste gas. In the biological treatment section of the method, acidic substances in the waste gas are removed by adopting an alkali washing method, and the condition that the biological activity is influenced in the biological filter is avoided; and in the biological treatment section of the method, the scrap iron is contained in the packing, the packing is stirred periodically by utilizing the variable electrode magnetism, the phenomena that the gas flow is influenced due to blockage and the reaction is non-uniform are avoided, a stirrer can be replaced, and the inner reaction space is saved.

Process for manufacturing olefin polymers, in which some of the suspension of olefin polymer particles formed in a diluent is drawn off from the polymerization reactor and diluted by means of a liquid before being sent into a hydrocyclone separator in which, on the one hand, a concentrated suspension of polymer particles and, on the other hand, a stream essentially comprising diluent are formed and separated.

The invention relates to a forming method for a molecular sieve, which mainly solves the problems of damaged the molecular sieve structure, lowered the specific surface area of the molecular sieve and corroded equipment because of adding nitric acid in the traditional forming technology. In the forming method for the molecular sieve, a technical scheme that inorganic aluminum salt solution serves as additive for forming better solves the problems. The forming method for the molecular sieve can be used for the production application of catalyst and adsorbent.

The invention provides a protection device for gas-protective welding, comprising a gas pipe, a centering cover plate, a gas connecting-guide rod, a supporting rib and a sealing cover plate, wherein the sealing cover plate is connected with the supporting rib, the lower end of the gas connecting-guide rod is flexibly connected with the supporting rib; the gas connecting-guide rod is fixed with the centering cover plate via a fastening mechanism and is connected with the gas pipe; the gas connecting-guide rod is in a hollow structure, the pipe wall of the gas connecting-guide rod is provided with a gas outlet hole; the centering cover plate is provided with an exhaust hole; and the sealing cover plate is made of elastic material. When the protection device provided by the invention is utilized to perform gas protection on the welding for a weld seam of an intersecting line of two revolving curved surfaces, the protective gas can be saved considerably and provided constantly, stably anduniformly, thus the welding quality at the weld seam is dramatically raised and the cost is lowered. The protection device provided by the invention is also applicable to the gas-protective welding for three-way pipes with different diameters, materials and specifications and for the weld seam of the intersecting line of two different revolving curved surfaces.

The invention relates to a method for charging shielding gas into a cultural relic experiment chamber. The method comprises the step that the shielding gas with the determined concentration in a gas source device is charged into the cultural relic experiment chamber to completely replace air in the cultural relic experiment chamber, so that the concentration of the shielding gas in the cultural relic experiment chamber reaches the needed concentration. According to the method, the final concentration of the shielding gas in the cultural relic experiment chamber is equal to the concentration of the shielding gas coming from the gas source device, and therefore the concentration of the shielding gas in the cultural relic experiment chamber is easily guaranteed.

The invention is widely applicable to the technical field of dehydration of paper mill sludge, electroplating sludge, leather sludge, domestic sludge and various types of sludge and particularly relates to a spiral filtration dehydrator. The spiral filtration dehydrator comprises a rack, wherein two spiral shafts are arranged on the rack in parallel, one end of each spiral shaft is connected with a spindle driving device, the two spiral shafts are respectively installed in two filter cartridges, towing wheel shafts are arranged between the outer side walls of the two filter cartridges and the two filter cartridges, one end of each towing wheel shaft is connected with a driving device, two ends of each filter cartridge are respectively a feeding port and a discharging port, the rack is provided with blanking port corresponding to the discharging ports, filtrate outlets are respectively formed in the middle positions, corresponding to the filter cartridges, on the rack, bristle brush roller devices are respectively arranged above the two filter cartridges, and a flushing water device is arranged on one side of the bristle brush roller devices. The spiral filtration dehydrator can decrease flocculant usage amount, adjust spiral and the roller rotation speed according to feeding concentration and control the staying and dehydration time of the sludge in a device. A dehydration effect is good, and material requirements are low. The outlet sludge concentration is adjustable, automatic operation is achieved, and labor intensity is low.

A composition for forming a polymeric cell culture surface includes (i) a pre-polymer comprising a polymer backbone, a cationic moiety conjugated to the backbone, and a cross-linker moiety conjugated to the backbone; and (ii) a peptide-polymer comprising a polymer backbone and cell adhesive peptide conjugated to the backbone. Cross-linked coatings for cell culture that have a suitable amount of cell adhesive peptide and cationic moiety may be formed from the pre-polymer and peptide-polymer.

The invention provides a low-dark-count-rate CMOS SPAD photoelectric device. A P-well layer is added based on a routine P+ / N-well type SPAD structure. The P-well layer is arranged between the P+ layerand the N-well layer. Furthermore, an N-well clearance is utilized as a virtual protecting ring of the structure; namely N-wells are added at two sides of a PN junction, wherein the structure is shown in the attached figures of an abstract. An incident photon is incident into the device and is attracted at the central N well, and furthermore a photon-generated carrier is generated. The P-well layer and the N-well layer are utilized at two sides of the PN junction. Hereon an avalanche junction is a P-well / N-well junction. Because the avalanche junction is a lightly doped avalanche junction, width of a depletion region increases, and probability of interband tunneling of the carries is reduced, thereby reducing the dark counting rate. Furthermore the virtual protecting ring is used for suppressing edge breakdown of the PN junction. The forming principle of virtual protection is characterized in that transverse diffusion exists between adjacent N-wells and therefore the N- virtual protecting ring is formed at the PN junction. The low-dark-count-rate CMOS SPAD photoelectric device is designed at two aspects of the protecting ring and the depletion region width, dark current of the device is reduced, thereby reducing the dark count rate.

Described are devices, methods, and systems that are suitable for rapidly and simultaneously determining the concentration of suspended particles in a sample. The devices, methods, and systems allow for the rapid and simultaneous interrogation of a large number of sample wells in a single vessel, for example, samples contained in a two-dimensional array or micro-titer plate, without the need for moving reading heads or moving the sample vessel. The nephelometry system allows the user to rapidly and simultaneously measure the concentration of the particles in numerous samples, adjust the concentration of the particles in the sample with a sample handling system, and re-measure the concentration of the samples in order to achieve a desired concentration.