209 results about "Drop method" patented technology

The present invention relates to a soft contact lens, and provides a contact lens which shows small and stable contact angle to water at its surface in water as well as in air, little deposition in wearing, high oxygen permeability, no adhesion of lens to a cornea and superior extended-wearing characteristics. The present invention provides a hydrogel soft contact lens which has contact angle at a lens surface in a range of 10-50° by the captive bubble method in water and 30-90° by the sessile drop method in air, oxygen permeability of not less than 30 and water content of not less than 5%, and also a hydrogel soft contact lens consisting of a polymer comprising a hydrophilic siloxanyl monomer shown by a specified general formula.

The present invention introduces a congestion control mechanism for constant bit rate (CBR) multimedia data flows in cable operator IP networks. A flow drop method within a congestion control unit of the present invention chooses a subset of multimedia data flows to drop, in whole, to alleviate a congestion condition. After the congestion condition is detected and the congestion control unit begins dropping multimedia data flows, the remaining multimedia data flows are no longer degraded for the end user, as compared to conventional congestion management systems.

The invention relates to a method for freezing and thawing placental whole cells and separating and expanding stem cells. The method comprises the steps as follows: disinfecting and washing a placenta tissue; cutting off placental lobules from the tissue, and carrying out digestive treatment for 20 min; preparing a placenta tissue freezing solution for standby application; adding whole cells obtained by digestive treatment and the freezing solution into a freezing tube, refrigerating for 0.5 h at the temperature of 4 DEG C, freezing for 1 day at the temperature of subzero 80 DEG C, and freezing in liquid nitrogen for standby application; taking out the placental whole cells from the liquid nitrogen when needed, thawing in a thermostatic water bath, carrying out drop-method washing by a culture medium for mesenchymal stem cells, removing red cells by a red cell lysis solution, and expanding the mesenchymal stem cells by the thawed placental whole cells through cell culture and cell passage. According to the method, the frozen placenta tissue can be effectively protected and is convenient to thaw and use; and the method is in particular suitable for separating and expanding the mesenchymal stem cells after thawing the frozen placental tissue.

Methods and apparatus for implementing notification by network elements of packet drops. In response to determining a packet is to be dropped, a network element such as a switch or router determines the source of the packet and returns a dropped packet notification message to the source. Upon receipt of notification, networking software or embedded hardware on the source causes the dropped packet to be retransmitted. The notification may also be sent from the network element to the destination computer to inform networking software or embedded logic implemented by the destination computer that the packet was dropped and notification to the source has been sent, thus alleviating the destination from needing to send a Selective ACKnowledge (SACK) message to inform the source the packet was not delivered. (Too narrow)

A method of determining material parameters associated with a conductor using four points includes injecting and extracting alternating current into the plate using current-carrying wires operatively connected to two of the four points, measuring potential drop between the remaining two of the four points, and calculating the material parameters. The conductor can be of a homogenous material, a stratified material, or other type of material. The conductor can have any number of geometries, including that of a plate, a cylinder, a tube, a stratified cylinder or other shape.

The present invention relates to a fall protection device used in the process of climbing steel tower of power transmission line. Said full protection device includes the following several portions: large hanger, small hanger, endless rope, delta wire-lock fastener, pear-shaped fastener, small tackle and safety hook. Said invention also provides a fall protection method by using said fall protection device and its concrete operation steps.

The invention provides a frame dropping method of a video image. The frame dropping method comprises the following steps that a plurality of frame buffer caches are arranged according to the number of preset frame buffer catches; input frame images are sequentially written into the frame buffer caches, and when the last frame buffer cache is written, the frame images are written from the first frame buffer cache again; the images in the frame buffer caches are read out according to preset frame loss rules. The invention further correspondingly provides a frame dropping system of the video image. When the frame dropping system is used for conducting frame dropping processing on the video image, the blocking phenomenon of a moving image is effectively improved.

The invention provides a high-temperature and high-pressure interfacial tension measurement device and method. The measurement device is provided with a buffer bottle and a gas injection pump between a steel cylinder and a visual kettle; a sample injection pump is connected with a pump flow control box and a pump temperature measurement probe; the gas injection pump is arranged in a cold trap which is connected with a low-temperature thermostatic bath; the gas injection pump is provided with an outer cavity and an inner cavity; a window of the visual kettle is a sapphire window; a temperature measurement probe and a pressure sensor in the kettle are respectively arranged on the two sides of a suspension dropper; a gas-liquid inlet and outlet pipe is vertically opposite to the suspension dropper at the bottom of the visual kettle. After the device and the method are adopted, the problems that pressurization is difficult when a pendant-drop method is used for interfacial tension measurement under the conditions of high temperature and high pressure, liquid drops easily fall off under mixed-phase condition, and the window needs high pressure resistance, high temperature resistance and high light transmittance can be solved; an experimental facility is safe and explosion-proof; the device and the method for interfacial tension measurement within the high experimental temperature range (over 100 DEG C) and under the high pressure (over 10 MPa) can be provided.

The invention provides a method for synthesizing aliphatic diepoxide safely and effectively in large scale. The synthesis method uses hydrogen peroxide as oxygen resource and uses heteropoly acid containing molybdenum or tungsten as phase transfer catalyst, in solvent to convert diolefin substrate completely into aliphatic diepoxide. The content of single expoy product in the product is 5-7% at mol ratio to effectively control the epoxy equivalent of product. The invention uses safe hydrogen peroxide as oxygen resource, to avoid using dangerous and explosive peroxy acetic acid, to improve production safety. And in the reaction, the invention eliminates over olefin and uses buffer to adjust the pH value of the solution to inhibit the hydrolysis of product, thereby improving production efficiency. The invention adds hydrogen peroxide via premixing emulsion and dropping method to eliminate the initiation of epoxidation, therefore the reaction is gentle and controllable and is suitable for industrial large production.

The invention discloses an anti-dropping method and a device for a robot. The method comprises steps: a first distance between the robot and an obstacle detected by a sensor is acquired; whether the first distance meets a first condition is judged, wherein the first condition is used for indicating the robot to be in a determined falling distance range; when the first distance meets the first condition, a stop command is sent to the robot, wherein the stop command is used for indicating the robot to stop moving; and when the first distance does not meet the first condition, the robot is controlled to execute an obstacle avoidance algorithm, wherein the obstacle avoidance algorithm is used for controlling the robot to avoid the obstacle. The technical problem of a long braking distance of the robot is solved.

The invention relates to a rapid detection kit of nitrite nitrogen in aquiculture water. The kit internally comprises one 10 mL stoppered cuvette, one colorimetric card, one suction pipe, two 20 mL dropping bottles, 20 mL of reagent A and 20 mL of reagent B. The detection method using the kit comprises the following specific operation steps of: (1) washing the cuvette 2-3 times with the water to be detected; (2) sampling 5 mL of water sample, adding 5 drops of the reagent A, then adding 5 drops of reagent B and uniformly shaking; and (3) covering the cuvette, lightly shaking, standing for 1-3 minutes, closing the cuvette to the blank of the colorimetric card, and comparing the color of the liquid in the cuvette with the color of the colorimetric card to obtain the content (mg/L) of nitrite nitrogen in the detected water sample. According to the invention, the content of nitrite nitrogen in the water sample to be detected is displayed by a developing agent, thus the rapid detection kit has the characteristics of being accurate, rapid, convenient, inexpensive and the like, does not need for any equipment, and adopts a counting drop method to measure; and is used for field rapid detection of water quality of aquiculture water, domestic sewage, industrial wastewater and the like, the rapid detection kit is very simple in use method.

A method for inducing the differentiation of stem cells into tissue cells; a bioartificial organ, which contains the tissue cells; and a material for medical purposes, which contains the bioartificial organ are disclosed. Stem cells capable of proliferation, self-replication and differentiation are used and cultured by a hanging-drop method to three-dimensionally construct a cell mass of embryoid bodies, and the cell mass is cultured in the presence of HGF, GDNF, b-FGF, BMP7 and EGF. In this manner, the stem cells can be differentiated into tissue cells. A bioartificial organ can be produced using cells that have been differentiated into the tissue cells. Further, a material for medical purposes can be provided.

This invention relates to a method for preparing spherical Al2O3 containing Si. The method comprises: adding silica sol into alumina sol to obtain mixed silica/alumina sol, performing oil drop method to obtain spheres, aging, washing, drying and torrefying to obtain spherical Al2O3 containing Si. The content of SiO2 is 1-15 wt.%, the specific surface area is 180-350 m2/g, the particle diameters are 0.005-5 mm, the pore volume is 0.7-1.5 mL/g, the content of pores with diameters of 2-80 nm is higher than 70%, and the packing density is 0.30-0.60 g/cm3. The spherical Al2O3 containing Si can be used as catalyst or catalyst carrier for petrochemicals and fine chemicals, and is suitable for hydrogenation refinery and selective hydrogenation.

The invention relates to an asphalt and ore material adhesion evaluation method based on the wetting theory and belongs to the technical field of highway performance measurement. The method is used for evaluating asphalt and ore material adhesion under a condition of high temperature. The method comprises the following steps: measuring the surface tension of high-temperature liquid asphalt by virtue of a pendant-drop method, and measuring the contact angle of the asphalt with the surface of an ore material at the same temperature by virtue of a sessile drop method; and calculating the adhesion work of the asphalt and the ore material so as to evaluate the asphalt and ore material adhesion. Through utilizing the method to evaluate the asphalt and ore material adhesion under the condition of high temperature, the influence of the high-temperature liquid asphalt on the wetting capability of the ore material and the stability of an asphalt mixture can be reflected.

According to one embodiment, an inkjet recording apparatus includes a plurality of inkjet heads of a multi-drop method, a first controller, and a second controller. The first controller controls ejection of ink drops from a first inkjet head for ejecting a first ink for which print resolution is required, in a manner that a number of ink dots formed in a main scanning direction is great, and that the number of ink drops ejected for each one of the ink dots is small. The second controller controls ejection of the ink drops from a second inkjet head for ejecting a second ink for which coverage over a recording surface of the recording medium is required, in a manner that a number of ink dots formed in the main scanning direction is small, and that the number of ink drops ejected for each of the ink dots is great.

The invention belongs to the technical field of tissue engineering biological scaffold materials and manufacturing thereof, and discloses an alginate/nano-clay composite microcarrier and a preparing method and device. The method comprises the steps of firstly, preparing a sodium alginate solution and nano-clay sol separately, and obtaining sodium alginate/nano-clay nano-composite hydrogel after the sodium alginate solution and the nano-clay sol are uniformly mixed. Furthermore, a stem cell suspension is mixed in the hydrogel, and besides, bioactive factors or drug ingredients can also be added. Then, the electrostatic drop method microcarrier preparing device which is mainly composed of a high-voltage power supply and a micro-injection pump is adopted, an open glass container containing acalcium chloride solution is used as a receiving device of the microcarrier, and proper injection speed and voltage are set. Compared with a pure alginate microcarrier, the prepared alginate/nano-claycomposite microcarrier has better mechanical performance, has the sustained drug release capability with which the alginate microcarrier is not endowed, and has an excellent application prospect in the field of stem cell treatment and tissue engineering.

The invention discloses a double-fuel machine control system and a double-fuel machine control method igniting natural gas due to micro-injection of diesel oil. The double-fuel machine control system comprises a monitoring cabinet, a unit pump control unit, a natural gas control unit and a sensor group, wherein under a pure diesel oil mode and a double-fuel mode, an electronic unit pump controls an injection mass and injection timing of the diesel oil; under the double-fuel mode, the natural gas control unit controls opening and closing of a gas valve in an intake manifold of each cylinder of the engine to control the amount of the natural gas; switchover from the pure diesel oil mode to the double-fuel mode is realized through adopting a stepped oil drop method; switchover from the double-fuel mode to the pure diesel oil mode is realized through adopting a stepped gas drop method; the non-uniformity of the exhaust temperature of each cylinder is controlled through adopting an exhaust temperature correction algorithm; and the ignition timing in each working condition is controlled through adopting an MAP table lookup method. The double-fuel machine control system and the double-fuel machine control method, which are disclosed by the invention, can achieve high combustion efficiency and good emission indexes.

The present invention relates to a multi-feature fusion pedestrian detection method based on an HIKSVM classifier. The method concretely comprises the following steps of: determining a behavior area in a pedestrian image sequence; extracting multi-item features in the behavior area, and forming fusion features; and employing a trained HIKSVM classifier based on the fusion features to perform pedestrian detection. The method provided by the invention improves a feature extraction method, after HOG features are extracted, a gradient field is changed to an optical flow field through analogy, andHOF features are extracted, shape information and motion information of an object are retained, so that computation complexity of describing a full-size moving object by employing the optical flow field is avoided and the robustness is high; an LBP algorithm is improved to extract texture features through adoption of an LQC algorithm, so that the computation complexity is reduced on the basis without losing texture information; and a histogram intersection kernel (HIK) and an intersection coordinate drop method are employed to perform classification training of the SVM classifier, so that thecomputation complexity is low and the detection precision is high.

The invention discloses a dropping method for large-tonnage steel liner of drilled pile. Being characterized in that a steel shield lower bracket is provided on the drilling platform; the lower bracket is provided with upper and lower supporting system; the upper supporting system is installed with a hanging lower lifting hack; the hanging lower lifting hack is connected to the steel shield lower bracket via the lower hanging bar; then the steel shield lower bracket is continuously hanged and gradually connected to the steel shield, circularly lowering. The invention is a new technology for large-tonnage steel liner of drilled pile. The advantages of the invention are following: 1, light and convenient lowering bracket structure; 2, equipment and materials used in the preparations are easy; 3, decentralization and devolution of hanging bars jack decentralization safe and reliable; 4, steel casing the overall decentralization process is simple and easy to operate; 5, shear reinforcement to prevent the sliding steel hoop decentralization and delegation of more safe and reliable; 6, movable box beam through the telescopic jack can be moved vertically and horizontally to precisely align the delegation of the location of steel casing.