1487results about How to "Avoid stacking" patented technology

The present invention provides a cell culture treatment device for culturing, treating and collecting cells, which includes a flow path, a cell-retaining section, a solution inlet, a solution outlet, a cell collection port and a lid. The present invention also provides an device for easily, efficiently separating and collecting the cells thereby in a short period of time, and provides a method therefor.

The invention relates to a lithium-titanate composite negative pole material and a preparation method thereof. The lithium-titanate composite negative pole material provided by the invention comprises lithium titanate, doping elements and a graphene/carbon nanotube composite material. The preparation method comprises the following steps: preparing a titanium source, a lithium source, soluble compounds of doping elements and the graphene/carbon nanotube composite material into a precursor by sol-gel in-situ synthesis, and calcining the precursor at 400-1100 DEG C to obtain the lithium-titanate composite negative pole material. The graphene/carbon nanotube composite material is utilized to effectively improve the electronic conductivity and rate capability of the lithium-titanate negative pole material; and the doping elements are introduced to effectively enhance the electrochemical properties and loop stability of the lithium-titanate negative pole material. The lithium-titanate negative pole material provided by the invention has wide application prospects in the field of lithium ion batteries.

The invention discloses an organic compound based on heteroaryl amine structure and application thereof to an OLED (Organic Light Emitting Diode). The compound structurally contains heteroaryl and benzo-heteroaryl amine structures at the same time, has relatively shallow LUMO energy stage, relatively high glass transition temperature and molecular thermal stability; the absorption in the visible light field is low; the refractive index is high; after the organic compound is applied to the CPL layer of the OLED device, the light extraction efficiency of the OLED device can be effectively improved.

The invention discloses heteroaryl amine structure based organic compounds and applications thereof. The structure of the organic compounds simultaneously comprises different types of heteroaryl groups and amino groups. The organic compounds have a low LUMO energy level, a high glass transition temperature, and high molecular thermal stability, have low absorption and a high refractive index in the visible light range, and can effectively improve the light emission efficiency of an OLED device, after being applied to the CPL layer of the OLED device.

Provided is a head gimbal assembly (HGA) in which the electrodes for a thermally-assisted magnetic recording head comprising a light source, a photodetector and a magnetic head element, can be reliably electrically connected to wiring members by solder ball bonding (SBB). The HGA comprises a suspension comprising: a base; a first wiring member for the light source and the photodetector, provided on a side of one surface of the base; and a second wiring member for the magnetic head element, provided on the same surface side. The first and second wiring members protrude from the base toward the head to be fixed. As a result, the end portions (connection pads) of the first and second wiring members can be located close to electrodes for light-source and photodetector and electrodes for magnetic head element, respectively. This arrangement enables the end portions of the first and second wiring members to be reliably electrically connected to the electrodes by SBB.

The invention relates to a method for the examination of cells (20, 38) in a culture medium, in particular for in-situ microscopy in a bio-reactor, whereby cells in a sample volume, the depth (d) of which is defined by windows (14, 16) in the direction of the optical axis of the microscope (18), are microscopically imaged and are automatically recorded and processed by means of an image processing system (30). Said method is characterized in that the depth (d) of the sample volume (12) is adjusted to the size of the cells (20, 38) by successively reducing the separation (d) of the windows while the image size (G) of the cells is simultaneously verified by the image processing system (30) such that a separation value (D) is determined at which the image size (G) of the cells begins to grow, thus corresponding to flattening caused by the contact pressure of the windows (14, 16), and that the separation (d) of the windows (14, 16) is set to said separation value (D) for the examination.

The invention discloses a method for preparing graphene aerogel and application thereof, and relates to the technical field of graphene materials. The method includes steps of uniformly mixing graphene oxide dispersion liquid and amine curing agents with one another to obtain graphene oxide mixed liquid; hermetically heating the obtained graphene oxide mixed liquid to obtain the graphene aerogel. The amine curing agents are one type of or a plurality of types of diaminodiphenyl-methane, diamino diphenyl sulfone, diethylenetriamine, triethylenetetramine, diethylaminopropylamine and m-phenylenediamine. The graphene aerogel prepared by the aid of the method can be applied to epoxy resin, so that graphene aerogel/epoxy resin composite materials with high conductivity and excellent mechanical properties can be obtained. The method and the application have the advantages that the graphene aerogel prepared by the aid of the method is internally of a uniform macroporous structure and is high in porosity; the amine curing agents are adopted in preparation procedures, accordingly, the epoxy resin interface bonding can be improved, and the conductivity and the mechanical properties of the epoxy resin can be enhanced.

The invention provides a graphene aerogel loaded two-phase transition metal sulfide as well as a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a three-dimensional graphene aerogel loaded nickel-cobalt hydrotalcite precursor by taking inorganic salts, namely, nickel nitrate and cobalt nitrate as raw materials, graphite oxide as a carrier and ammonia water as an alkali source and a structure-directing agent; and then, sulfurizing the precursor by taking thioacetamide (TAA) as a sulfur source, and performing calcination under an inert atmosphere to improve crystallinity, thereby obtaining graphene aerogel loaded two-phase transition metal sulfide nano-particles. The obtained graphene aerogel loaded two-phase transition metal sulfide has a nano-scale grain size, is uniformly dispersed, has a large specific area larger than that of two-dimensional graphene, is high in purity and good in electrochemical performance, and particularly has a very good reversible discharge capacity and stable cycle performance when used as a lithium ion battery cathode material.

A top cap assembly is provided for mounting tendon to a balloon that has a balloon envelope. The assembly includes a plate structure having a plurality of junction portions disposed at an apex of the balloon envelope and a plurality of tendon pairs. Each tendon pair includes first and second tendon members attached to the balloon envelope. The first tendon member is arranged to cross over the plate structure. The second tendon member is arranged to engage the first length tendon member at a given one of the junction portions of the doubler plate. A fastener member is attached to each tendon pair of the plurality of tendon pairs. The fastener member is used for securing the first and second tendon members of a given tendon pair together in order to support lift gas carried by the balloon envelope.

The invention relates to a graphene oxide size grading method. The method includes the steps of: 1) dispersing a graphene material in a solvent to obtain a graphene material dispersion liquid; 2) under the condition of an externally applied force, passing the graphene material dispersion liquid through a porous membrane to obtain filtrate and trapped fluid, and conducting separation to obtain graphene materials with different size ranges. Based on the correlation of graphene material size and separation membrane pore size, the method disturbs the graphene material solution to prevent pore channel blockage, and realizes physical one-step method size grading of the graphene material (e.g. graphene oxide). By selecting multiple pore sizes and separation number of times, the graphene material can be separated into a lot of grades according to size. The one-step method for size grading of graphene material is simple, effective, cheap and environment-friendly, and can be used on a large scale. At the same time, the filter membrane for separation can be used repeatedly, thus saving cost.

The invention discloses a nitrogen and sulfur co-doped hierarchical porous carbon composite material, and a preparation method and an application thereof, and belongs to the technical field of supercapacitor electrode materials. A natural polymer material which is abundant in the nature, low in price and easy to obtain is used as a carbon source, graphene oxide is added to improve the conductivity, an activator and a doping agent are added in advance, and a general two-step technology (high-temperature carbonization and chemical activation) for preparing a carbon material is simplified into one-step high-temperature annealing, so that the carbon material with a high specific surface area and a hierarchical porous three-dimensional structure is obtained; and nitrogen and sulfur doping improves the electrochemical performances of the material. The composite carbon material has the advantages of high mass specific capacitance, excellent high-current rate capability, ultra-long cycle life,high mass energy density and high power density when used as a high-performance electrode material for a supercapacitor. The preparation method has the advantages of simplicity, feasibility, low requirements on reaction deices, environmental friendliness, and suitableness for industrial production.

The invention discloses a pipe continuous supplying mechanism and belongs to the field of workpiece machining mechanical equipment. A pipe guide mechanism and a pipe feeding mechanism of the pipe continuous supplying mechanism are sequentially arranged on one side of a fixed support in an inclination direction from top to bottom. A pipe distributing charge pipe is vertically arranged in the position, on the lower side of a pipe guide charge pipe, of the fixed support. A pipe bearing baffle is arranged on the lower side of the pipe guide charge pipe. A baffle tension spring is arranged betweena spring connecting rod and a pushing plate pressing rod in an obliquely connected mode. A pressing rod roller is horizontally and rotationally connected to one side of a lifting pressing block. A pipe feeding motor and a pipe feeding rotary shaft are connected through a pipe supplying belt in a transmission mode. A plurality of pipe feeding bearing plates are fixedly arranged on the outer side ofa pipe feeding guide wheel in the radial direction of the pipe feeding guide wheel. A supplying charge pipe is obliquely arranged in the position, on the lower side of the pipe feeding guide wheel, of the fixed support. A pipe collecting charge pipe is obliquely arranged in the position, on the lower side of the supplying charge pipe, of the fixed support. The pipe continuous supplying mechanismis reasonable in structural design, can achieve continuous and stable conveying and supplying of pipes, can discharge pipes in a branched mode according to the requirements of next pipe machining loads, and meets the requirements of production and using.

The present invention discloses a preparation method of a nitrogen doping carbonized bacterial cellulose/graphene/platinum composite nanomaterial. The material is prepared according to the following steps of pre-treating flocculent bacterial cellulose generated in fermentation of acetobacter xylophilus, then refrigering and drying the flocculent bacterial cellulose so as to obtain flocculent bacterial cellulose; homogenizing at high speed so as to obtain a uniform solution, mixing the uniform solution with graphene oxide, and dispersing the mixture uniformly through ultrasonic; and adding a dopamine solution, stirring and mixing by using a machine, adding chloroplatinic acid finally, and carbonizing at high temperature so as to obtain the nitrogen doping carbonized bacterial cellulose/graphene/platinum composite nanomaterial. The composite nanomaterial prepared by the method uses a one-step method to carbonize, and the reaction process is easy. Under the action of the dopamine, the flocculent bacterial cellulose and the graphene oxide are bonded, so as to form a three-dimensional networked cross-linked skeleton structure. In carbonization, nitrogen doping and platinum reduction are realized, and the conductive nanometer composite system that has small and uniformly distributed particles is prepared. The nanomaterial prepared by the method can be applied to application fields such as fuel batteries and super capacitors.

In a method for detecting a level of contamination of a particle sensor provided with two electrodes situated on an insulator material for generating an electrical field, the insulator material is heated to above a limiting temperature of the insulator material at which the insulator material begins to become conductive. The insulator material is modulated by heating or cooling, the modulation being carried out at a lower temperature and an upper temperature which are each above the limiting temperature. The variation over time of a measuring signal which may be picked up between electrodes is measured during the modulation. The measured variation over time of the measuring signal is compensated using a theoretical variation over time of the measuring signal in a contamination-free state of the particle sensor in order to obtain a variation over time of a differential signal.

The invention provides a space six-degrees-of-freedom mechanism used for a hypersonic wind tunnel multi-body separation test. The mechanism comprises Z, X and Y three degrees of freedom straight-line motion mechanisms and [beta], [alpha] and [gamma] three degrees of freedom angular displacement motion mechanisms. The six-degrees-of-freedom are realized layer by layer and are connected step by step, and in terms of structure, embedment integration is achieved by a box stacking mode. A Z-direction mechanism, an X-direction mechanism and a [beta] mechanism are sequentially overlapped from bottom to top, and a Y-direction mechanism and a [alpha] mechanism are in embedded connection from outside to inside. A [gamma] mechanism is fixedly connected with the [alpha] mechanism through a bent blade, and is individually arranged in a wind tunnel flow field. Each of the Z-direction mechanism, the X-direction mechanism and the Y-direction mechanism adopts two driving assemblies in symmetric arrangement, so that the power and the size of a driving motor are effectively reduced, and the overall stability of the mechanism is improved. The [beta] mechanism and the [alpha] mechanism adopt line-to-arc mechanisms for implementation, so that overlapping of traditional three degrees of freedom rotation pairs is prevented, and the mechanism cantilever length is shortened. The structure is compact, the rigidity is good, andsix-degrees-of-freedom movement of high speed, high precision and high bearing capacity is achieved.

The invention discloses an integrated multifunctional parking braking system and a control method thereof. A first bi-directional valve, a dust filtration check valve, a pressure reducing valve, a parking braking electromagnetic valve, a second bi-directional valve, an electric interlocking cock and an outlet in the system are connected in sequence. The first bi-directional valve is connected with a first air source and a second air source. A parking braking air cylinder is arranged between the dust filtration check valve and the pressure reducing valve. The second bi-directional valve is connected with a comparison outlet. A first pressure switch and a second pressure switch are arranged between the electric interlocking cock and the outlet. The integrated multifunctional parking braking system and the control method thereof have the advantages that the original parking braking function is reserved, meanwhile, the function of the double air sources from a total air pipe and a train pipe (or other external air sources) is achieved, and it can be guaranteed that parking braking can be automatically implemented when total air does not exist; meanwhile, the functions of parking braking status display, mechanical display or digital display, manual release and the like can be achieved; an air board integration mode is adopted, the size is small, the integration degree is high, and rapid installation or maintenance is facilitated.

The invention relates to a solder auxiliary soldering method, in particular to a graphene-enhanced Al-based composite solder auxiliary soldering method. The method solves the problems that existing graphene is poor in aluminum base enhancing effect and poor in dispersibility. The method comprises the steps that an oxidized graphene suspension and an aluminum solder suspension are mixed, dried and then placed into a plasma enhanced chemical vapor deposition vacuum device for reduction treatment, then, the mixture is pressed into foils, the graphene/aluminum-based solder foils are placed between to-be-soldered faces of metal to be soldered for vacuum soldering, and the graphene-enhanced Al-based composite solder auxiliary soldering method is completed. The method is used for graphene-enhanced Al-based composite solder auxiliary soldering.

The invention includes new water-soluble NIR fluorochromes, e.g., for biomedical imaging. The new dyes are highly stable, asymmetric cyanine compounds, characterized by 1) superior chemical stability, 2) excellent optical properties (e.g., high quantum yield), 3) bio-compatibility, 4) conjugatability and 5) ideal in vivo imaging properties. Monoactivated hydroxysuccinimide esters of the new dyes are highly reactive with peptides, metabolites, proteins, peptide-folate conjugates, and other biological macromolecules and affinity ligands, forming stable complexes. Affinity molecules tagged with the new dyes can be used, for example, for imaging of tumors in vivo.

The invention relates to a graphene-nonmetal-metal composite material for 3D printing, a preparation method and application. The preparation method comprises the following steps: (1) mixing, grinding and shearing graphene quantum dots and/or graphene micro-sheets, nonmetal simple substances and/or nonmetal compounds, and metal simple substances and/or metal compounds under the effect of ultrasonic waves (the frequency of the ultrasonic waves is 10-100 KHz) to obtain a composite slurry material or a composite powder material, wherein the mass ratio of the graphene quantum dots and/or the graphene micro-sheets, the nonmetal simple substances and/or the nonmetal compounds, and the metal simple substances and/or the metal compounds is 1: (1-45): (1-45); and (2) drying the prepared composite slurry material or powder material. The invention provides the laser sintering graphene-nonmetal-metal composite material for 3D printing and the preparation method of the laser sintering graphene-nonmetal-metal composite material. The composite material has excellent properties of high hardness, high strength, corrosion resistance and easiness in processing and using; after 3D printing is finished, densification of particles of the composite material is promoted by laser sintering and quenching, crystalline grains are refined, and therefore, the mechanical property of 3D printing products is improved.

The invention belongs to the technical field of flexible carbon materials, and discloses a carbon aerogel with ultra-high linear sensitivity and preparation and application of the carbon aerogel in asensor. The method comprises the following steps: (1) ultrasonically exfoliating and dispersing MXene materials in water to obtain MXene suspension; (2) adding nano-microcrystalline cellulose to the suspension, and performing ultrasonic treatment, liquid nitrogen refrigeration, and freeze-drying to obtain a composite aerogel; carbonizing the composite aerogel in inert atmosphere to obtain the elastic carbon aerogel. According to the invention, the advantages of MXene and the nano-microcrystalline cellulose are combined, the dispersion, support and connection of the nano-microcrystalline cellulose for MXene are utilized, the strengthening effect of an MXene sheet layer on the aerogel is combined and the refrigeration, freeze-drying and carbonization are performed to prepare the carbon aerogel with high compression, high resilience and excellent recycling use performances and the characteristics of ultra-high linear sensitivity and the like. The carbon aerogel disclosed by the inventionis applied to a sensing electronic device.

The invention provides a novel resonant DC-link soft switching inverter and a modulation method thereof, and relates to the technical field of inverters. The inverter comprises an auxiliary resonant circuit, an inverter bridge, a load circuit and a DC power supply, wherein the auxiliary resonant circuit comprises a bus switch tube, two auxiliary switch tubes, two auxiliary resonant inductors, a primary resonant capacitor, two auxiliary resonant capacitors, an anti-parallel diode of the bus switch tube and four auxiliary diodes; the inverter bridge is of a three-phase bridge structure; the load circuit is a three-phase resistor-inductance load; and various main power switch tubes of the inverter bridge work in manners of sine pulse width modulation and complementary turn-on at a phase difference of 180 degrees. According to the novel resonant DC-link soft switching inverter, a zero-crossing reverse process of current of each auxiliary resonant inductor is avoided, the service life of the inverter is prolonged, and the current stress of the auxiliary switch tubes of the inverter, the conduction loss of the auxiliary resonant circuit and the switching losses of the bus switch tube and the auxiliary switch tubes are effectively reduced.

The invention discloses an automatic sorting device of a pipette tip, and the device comprises a pipette tip conveying device and a pipette tip receiving device which is arranged on the lower side of the pipette tip conveying device; the pipette tip conveying device comprises a screw rod and a slide rod; the screw rod is rotationally connected to a frame; a driving device is connected onto the screw rod; the slide rod is fixedly connected onto the frame, and is arranged in parallel with the screw rod; a gap is left between the slide rod and the screw rod; the biggest gap between the slide rod and the screw rod is smaller than the maximum diameter of the pipette tip, and is more than the minimum diameter of the pipette tip; a pipette tip outlet which corresponds to the pipette tip receiving device in position is arranged on the gap; and the gap of the pipette tip outlet is more than the maximum diameter of the pipette tip. According to the automatic sorting device of the pipette tip, the technical problems of the prior art that an existing sorting device has low efficiency, a poor effect and poor reliability are solved.

The invention discloses small-blocking-agent-loaded graphene conductive slurry and a preparation method and application of the small-blocking-agent-loaded graphene conductive slurry. The conductive slurry comprises 1wt% to 10 wt% of conductive components, 0.5 wt% to 8 wt% of dispersing agents and 85 wt% to 95 wt% of solvents. The conductive components comprise small-blocking-agent-loaded graphene serving as the basic conductive components and auxiliary conductive components. According to the slurry, small blocking agents are loaded on the graphene so that stacking among the graphene can be eliminated thoroughly, the processing difficulty of the graphene is lowered, the dispersity of the graphene in the conductive slurry is improved greatly, and thus the conductive slurry excellent in performance is obtained; according to electronic devices formed through the conductive slurry, especially energy storage devices, such as li-ion battery products which have excellent conductive performance and heat conducting performance, the power density, rate capacity, tap density, circulation stability, and other performance of the electronic devices are improved greatly, the service life of the electric devices is greatly prolonged, and the conductive slurry is simple in preparation process and low in cost.