210 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 reviving umbilical cord tissues and for separating and increasing stem cells after reviving the umbilical cord, and the step comprises the following steps of preparing umbilical cord tissue freezing liquid; sterilizing and washing the umbilical cord tissues; cutting the tissues into blocks; placing the tissue blocks and the freezing liquid into afreezing tube, cold storing the tissue blocks for 0.5 hour under the temperature condition of 4 DEG C and then storing the tissue blocks for one day under the temperature condition of minus 80 DEG C,and then freezing the tissue blocks in liquefied nitrogen; and taking the umbilical cord tissues out of the liquefied nitrogen to use, thawing the umbilical cord tissues in constant-temperature waterbath, utilizing mesenchymal stem cell culture base to washing the umbilical cord tissues through a drop method, and separating and increasing the mesenchymal stem cells of the revived umbilical cord tissues through a tissue attachment method. The method can effectively protect the frozen umbilical cord tissue, so that the umbilical cord tissues can be revived to use, and the method is particularly suitable for separating and increasing the mesenchymal stem cells after the umbilical cord tissue is revived.

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.

The invention discloses a system for calculating a feasible operation range of a BHKW under the condition of ordering power by heat. The system comprises a data collecting and analyzing module, a working condition changing calculating module, a working condition graph module and a peak adjusting load reading module which are sequentially connected, wherein the data collecting and analyzing module reads operation data from a power plant DCS and obtains a representation actual operation benchmark working condition point through the clustering methodology method, and the working condition changing calculating module carries out working condition changing calculation based on the equivalent enthalpy drop method, extracts a working condition changing characteristic according to the optimum square approach method of a continuous function and obtains an actual operating working condition curve of the BHKW. The working condition graph module is obtained according to a working condition changing characteristic curve. The peak adjusting load reading module intelligently calculates the feasible operation range of a peak adjusting load from a working condition graph based on a database. The invention further provides a method for calculating the feasible operation range through the system. The system and method can be used for carrying out operation calculation of a large combined heat and power generation single drawing unit and a large combined heat and power generation double-drawing unit, and a heat supply unit is arranged to adjust the peak, so that thermal power plant and power grid dispatching is greatly facilitated.

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)

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 discloses a low-altitude positioning load air-drop method based on a multi-rotor unmanned aerial vehicle. The multi-rotor unmanned aerial vehicle comprises an aerial flight platform, onboard task equipment and a ground remote control device. The onboard task equipment is located below the aerial flight platform. The onboard task equipment comprises an air-drop engine, a positioning camera and a directional voice broadcast device. The method solves the problem that air-drop of badly-needed emergency supplies is difficult in emergency rescue. The multi-rotor unmanned aerial vehicle has the advantages of being low in cost, easy and convenient to operate and easy to maintain and facilitating transport; with the low-altitude hovering function of the multi-rotor unmanned aerial vehicle and the assistance of the onboard assistant task equipment such as the voice broadcast device and the positioning camera, material air-drop accuracy and utilization efficiency are improved. The method has outstanding application value for a small number of loads which is light and is badly needed by trapped persons, and has great popularization potential in the field of air-drop of emergency rescue supplies.

The invention relates to a method using the 3D printing technology to prepare dropping pills. The method using the 3D printing technology to prepare the dropping pills comprises the steps of (1) using polyethylene glycol and the like as base materials, carrying out heating melting, (2) adding prescription drugs at the specified temperature, carrying out mixing, even stir and freeze drying to obtain solid powder, carrying out sieving on the solid powder, and (3) placing the solid powder into a powder box of a 3D printer, and preparing the dropping pills through electronic drafting, remote data transmission and laser scanning printing. According to the method using the 3D printing technology to prepare the dropping pills, due to the facts that through a series of technologies such as the electronic design technology, the remote data transmission technology, the laser scanning technology and the raw material and auxiliary material melting technology, the specific drug powder materials are melted, and electronic model graphs are changed into the real dropping pills according to designed indications, the advantages of the dropping method of preparing the dropping pills are kept, and the defects that due to the influence of the factors such as physical properties of liquid medicine, droppers and cooling liquid, pill weights are different, the roundness of pills is difficult to control, the percent of pass is low, and specially-shaped dropping pills cannot be easily prepared when the dropping method is used for preparation are overcome.

The invention relates to methods for separating, freezing and thawing a whole cell of an umbilical cord and separating and augmenting a thawed stem cell. The method for separating and freezing the whole cell of the umbilical cord comprises the following steps of: sterilizing and cleaning an umbilical cord tissue; shearing the tissue into a block shape and carrying out digestion treatment for 1.5 hours; preparing a umbilical cord tissue frozen solution for later use; and adding the whole cell and frozen solution which are obtained by sterilizing treatment into a freezing tube, refrigerating the freezing tube for 0.5 hour at low temperature of 4DEG C, freezing the freezing tube for one day under the temperature condition of -80DEG C and then freezing the freezing tube in liquid nitrogen for later use. The method for thawing the whole cell of the umbilical cord comprises the following steps of: when the whole cell of the umbilical cord is required, extracting the whole cell of the umbilical cord from the liquid nitrogen, thawing the whole cell of the umbilical cord in a constant-temperature water bath; cleaning the whole cell of the umbilical cord by using a mesenchymal stem cell culture medium and a drop method; and augmenting a mesenchymal stem cell by using the thawed whole cell of the umbilical cord through cell culture and cell passage. According to the methods disclosed by the invention, the frozen umbilical cord tissue can be effectively protected and is convenient for thawing; and the method is especially suitable for separating and augmenting the mesenchymal stem cell after the frozen umbilical cord tissue is thawed.

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 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 relates to a method for measuring the effective share of delayed neutrons. According to the method, an improved source multiplication method is combined with a known experimental measurement subcritical reactivity method to measure the effective share beta eff of the delayed neutrons. Namely, the improved source multiplication method is used for giving out the subcritical reactivity rho of a reactor, then the known experimental measurement subcritical reactivity method is used for giving out reactivity using the beta eff as a unit such as a source jerk method and a rod drop method, and the effective share beta eff of the delayed neutrons can be obtained by comparing the two methods. The measuring method does not need any special equipment and condition, and can be carried out in a subcritical extrapolation experiment of the reactor, so that the method is simple; and moreover, the reactivity obtained by the method does not depend on theoretical calculation like before, and can be measured in the physical starting process of the reactor.

The invention provides a cold-strip steel edge drop method through working roll asymmetric shifting control, which comprises the steps that the width of entrance strip steel serves as feedforward presetting control; practical convexity degrees of the two sides of an incoming material are measured by an entrance multipoint convexity gauge, and tapered section insertion quantities of tapered working rolls on a driving side and an operation side are calculated by the feedforward control and serve as the feedforward presetting control; an incoming material running deviation measured by the entrance multipoint convexity gauge serves as the feedforward presetting control; practical edge drops of the two sides of finished strip steel are measured by an exit multipoint edge drop gauge, and the tapered section insertion quantities of the tapered working rolls on the driving side and the operation side are calculated by a feedback closed-loop control model; and according to position changes of the single-taper working rolls on the driving side and the operation side, bending compensation control on the working rolls is performed. Through independent shifting of an upper working roll and lower working roll, and independent roll bending of the working rolls on the operation side and the driving side, independent control on the thicknesses of the two side edges of the strip steel is realized, the incoming material with different convexity degrees on the two sides reaches a perfect edge drop effect, and the influence from strip steel off-tracking on the edge drop is compensated.

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 present invention concerns spheroidal alumina particles, catalysts comprising such particles as a support and a process for the production of spheroidal alumina particles, comprising the following steps:a) preparing a suspension comprising water, an acid and at least one boehmite powder for which the ratio of the crystallite dimensions in the [020] and [120] directions obtained using the Scherrer X-ray diffraction formula is in the range 0.7 to 1;b) adding a pore-forming agent, a surfactant and optionally water, or an emulsion comprising at least one pore-forming agent, a surfactant and water to the suspension of step a);c) mixing the suspension obtained in step b);d) shaping the spheroidal particles by the oil-drop method using the suspension obtained in step c);e) drying the particles obtained in step d);f) calcining the particles obtained in step e).

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 invention discloses a fully automatic seedling pick-up and dropping device and a seedling pick-up and dropping method thereof. The fully automatic seedling pick-up and dropping device comprises a fixed frame, a disk feeding device, a seedling ejecting device, a seedling pick-up device, a bearing device and a control system; the disk feeding device is fixed on the fixed frame and is provided with a seedling disk work position and a seedling disk waiting position relative to the fixed frame; the seedling ejecting device is mounted on the fixed frame and is arranged below a seedling disk, located at the seedling disk work position, of the disk feeding device; the seedling pick-up device is mounted on the fixed frame relative to the seedling ejecting device and is arranged above the seedling disk, located at the seedling disk work position, of the disk feeding device; the bearing device is mounted on the fixed frame relative to the seedling pick-up device and is arranged below the seedling pick-up device; the control system is mounted on the fixed frame, connected with the disk feeding device, the seedling ejecting device, the seedling pick-up device and the bearing device and used for controlling the disk feeding device, the disk ejecting device, the seedling pick-up device and the bearing device to complete seedling pick-up and dropping operations according to the timing sequence required order. The invention also discloses the seedling pick-up and dropping method of the device.

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 an anti-slip and anti-run method used for hot-melt epoxy powder antiseptic additional weight, comprising (1) sanding process on the surface of steel pipe, (2) wrapping an antiseptic layer of hot-melt epoxy powder outside of the steel pipe, (3) wrapping adhesive which is olefin copolymer outside of the antiseptic layer, (4) daubing anti-slip particles which are polyethylene or profax particles on the adhesive, (5) daubing concrete additional weight layer on the anti-slip particles. The invention using the anti-slip technology increases the shear capacity of the antiseptic layer and the concrete layer and the adaptability for working condition of sea pipe-laying.

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.

The invention discloses a quantum dot optical fiber core material with PMMA as a substrate and the preparation and application thereof. The optical fiber core material adopts PMMA as the substrate, adopts PbS or PbSe quantum dots as dophant, the doping method of the PbS or PbSe quantum dots is spatial uniform doping, the size of the PbS or PbSe quantum dots is 4nm to 20nm, and the number density of the PbS or PbSe quantum dots in the optical fiber core material is 1*1016-1*1019cm-3. The optical fiber core material is heated to 150 to 185DEG C, and becomes gelatinous; the gelatinous optical fiber core material is poured into a capillary through a pressure drop method, and quantum dot optical fibers with the number density of the quantum dots of 1*1016-1*1019cm-3 are prepared. When the quantum dot optical fibers are applied to an optical fiber amplifier, high optical gain, wide modulation bandwidth and low noise can be realized in a 1.2 to 1.6 micron communication waveband.