167results about How to "Concentration adjustable" patented technology

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.

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.

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.

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.

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.