116results about How to "Poor repeatability" patented technology

To provide a consistent, high-speed, high-precision measurement method based on an electron beam simulation by reflecting the apparatus characteristics of a CD-SEM in an electron beam simulation, the present invention discloses a method for measuring a measurement target pattern with a CD-SEM, the method comprising the steps of performing an electron beam simulation on various target pattern shapes, which is reflected apparatus characteristic and image acquisition conditions; creating SEM simulated waveforms; storing a combination of the created SEM simulated waveforms and pattern shape information corresponding to the created SEM simulated waveforms as a library; comparing an acquired actual electron microscope image with the SEM simulated waveforms; selecting the SEM simulated waveform that is most similar to the actual electron microscope image; and estimating the shape of the measurement target pattern from the pattern shape information corresponding to the selected SEM simulated waveform.

The invention in particular relates to a whole-blood labeled immunoassay method for quickly collecting a target object from whole-blood through specificity binding reaction and labeling and monitoring the target object by a labeling technology, and an instant detection system. The method comprises the following steps: 1) capturing magnetic beads; 2) eluting blood; 3) labeling a detection antibody; 4) eluting the detection antibody; 5) detecting. The system comprises a microfluidic chip, a magnetic field generation device arranged above or below the microfluidic chip and a detection device, wherein the microfluidic chip comprises a microchannel, the magnetic beads arranged in the microchannel, a waste liquid outlet and an eluent storage pond; the microchannel is separated into a first reaction region, a second reaction region and a detection region in stages by a separation mechanism. The technical scheme provided by the invention has the characteristics of high sensitivity, high repeatability, simple system structure, low cost and the like, and can detect the target object from trace blood samples quickly and quantitatively.

A reconnectable connection between an optical bench supporting an optical fiber and a photonic integrated circuit (PIC), which a foundation and a connector that is configured and structured to be removably attachable for reconnection to the foundation in alignment therewith. The foundation can be aligned to electro-optical elements in the PIC. The foundation may be permanently attached with respect to the opto-electronic device. The optical bench can be removably attached to the foundation. Alignment between the foundation and the connector is achieved by kinematic coupling, quasi-kinematic coupling, or elastic-averaging coupling.

The invention discloses a method for preparing a sodium-ion battery negative electrode material with sodium alga acid as a carbon source. The method comprises the steps that sodium alga acid is dissolved in deionized water at first, the temperature is kept at 60-90 DEG C in the whole process, stirring is carried out, and even viscous liquid is obtained, wherein 0.8-20 g of sodium alga acid is dissolved in each 100 mL of deionized water; the obtained even viscous liquid is frozen and dried to obtain the spongy sodium alga acid with a loose structure; finally, the obtained spongy sodium alga acid is roasted in the inert atmosphere and cooled to room temperature after roasting is finished, dilute acid soaking is carried out, the sodium alga acid is washed with water and ethyl alcohol to be neutral through suction filtration, then, vacuum drying treatment is carried out, and the sodium-ion battery negative electrode material is obtained. The prepared sodium alga acid derivative carbon material is used as the room temperature sodium-ion battery negative electrode material, the problems that a bulk carbon material is low in battery capacity and serious in volume expansion effect can be solved, and the material has the advantages of being high in cycling stability and high in battery capacity.

An arrangement for, and a method of, accurately determining at least one optical property, such as coverage and/or symmetry, of a gemstone, employ an energizable, stationary light source for directing light rays at different orientations to an uncovered table of the gemstone, and an energizable, stationary backlight spaced away from a culet of the gemstone. A controller energizes the light source to generate return light from the gemstone for each light ray, and energizes the backlight to illuminate the gemstone from behind. An imager images the return light as a plurality of frontlit images, and images the backlit gemstone as a backlit image. The controller processes at least one of the images to determine the optical property of the gemstone.

The invention provides a method for manufacturing a foamed aluminum board. The method comprises the following steps of: putting titanium hydride powder containing 1 to 3 percent foaming agent into an aluminum or aluminum alloy pipe, sealing a plurality of aluminum or aluminum alloy pipes into which titanium hydride powder is filled in an aluminum or aluminum alloy box, performing mill processing and densifying, and foaming to prepare the foamed aluminum board. By the method, the defects that the pore structure is difficult to control in a casting method and preparation cost is high in a powder metallurgy method are overcome. Compared with an accumulative roll-bonding method, the method has the advantages that the foaming agent can be distributed uniformly, the pore volume can be controlled, the method is not limited by rolling reduction of a critical pass; by the method, the processing can be performed by a compound blank with a large section size, so that a foamed aluminum precursor can be manufactured under a low distortion temperature condition; and the method is convenient to operate and is low in cost.

A preparation method of an electrochemical sensor of a highly dispersed graphene/Zn-based metal organic framework composite material comprises the following steps: the step A of preparation of the highly dispersed graphene; the step B of preparation of a highly dispersed graphene supported Zn-based metal organic framework composite material; the step C of preparation of the electrochemical sensor.Application of the electrochemical sensor of the highly dispersed graphene/Zn-based metal organic framework composite material is also provided and directly used for electrochemical detection of hydrogen peroxide in the following method: utilizing the electrochemical sensor as a working electrode, Ag/AgCl as a reference electrode and a platinum wire electrode as an auxiliary electrode to form a three-electrode system; placing the three-electrode system in a phosphate buffer solution; recording a current-time curve at the constant potential of -0.40 V, and adding hydrogen peroxide to the phosphate buffer solution to obtain the hydrogen peroxide concentration according to the current. The electrochemical sensor is simple, accurate, low in cost and fast in detection.

The invention discloses a method for preparing a large-area orderly porous membrane. The method comprises the following steps: (1) dissolving a polymer and a surfactant into a solvent so as to prepare a polymer solution; (2) dropwise adding the prepared polymer solution to the surface of a substrate, and putting the substrate into a closed container; (3) introducing steam into the closed container from the downside of the substrate, controlling relative humidity to a stable state, and carrying out standing on the substrate for a certain time in a stable-state humidity atmosphere; (4) taking the substrate out of the humidity atmosphere, and drying the substrate, thereby obtaining the orderly porous membrane. According to the method, the preparation of nanoscale-pore-size and micron-scale-pore-size porous membranes can be taken into account by one process route, and the process route is not required to be changed during the production of the porous membranes of different pore sizes, so that the production cost is reduced; the large-area orderly porous membrane with high stability can be prepared.

The detection test paper strip includes four parts: the filtering sample paper, glass fiber of antibody of amphetamine methyl marked by colloidal gold, in T line area (detection area), coated by amphetamine methyl-BSA and in C line area (quality control area), film of pyroxylic coated by ovine antibody for anti the antibody of rat, absorbent paper. The formula of the process solution of the filtering sample paper is as follows. Brij 0.05-3 wt%, Triton X-100 0.01-2%, BSA 0.5-3%, NaCI 3-9%, pure water 90-97%, PB buffer solution 0.01-0.03 mmol. The invention provides the features of high sensitivity, strong specificity, good repeatability, fast and accurate.

A gemstone to be optically examined is held by a holder having an internal compartment. A mounting plate supports the gemstone table-side up in an upright position within the internal compartment. A protective lid is mounted on the holder for movement between a closed position in which the lid overlies the mounting plate and the gemstone supported thereon, and an open position in which the lid uncovers the gemstone for optical examination.

The invention relates to a preparation method of a highly dispersed graphene/Fe-based metal organic framework composite material electrochemical sensor. The preparation method comprises the followingsteps: A, preparing highly dispersed graphene; B, preparing a highly dispersed graphene activated Fe-MOF electrode material; and C, preparing the electrochemical sensor. The application of the highlydispersed graphene/Fe-based metal organic framework composite material electrochemical sensor comprises the following steps: (1) forming a three-electrode system by taking the highly dispersed graphene/Fe-based metal organic framework composite material electrochemical sensor as a working electrode, an Ag/AgCl as a reference electrode and a platinum wire electrode as an auxiliary electrode; putting the three-electrode system in a phosphate buffer solution; and successively adding a hydrogen peroxide solution into the phosphate buffer solution at a constant level of -0.40 V. The invention provides the simple, accurate and low cost quickly detected electrochemical sensor.