116results about How to "Poor repeatability" patented technology

The invention provides a solar silicon wafer defect detecting system. The solar silicon wafer defect detecting system comprises a visual image acquisition system, an image processing system and a sorting system; the visual image acquisition system is used for automatically acquiring images of silicon wafers on an automatic silicon wafer production line; the image processing system is used for analyzing the acquired silicon wafer images, automatically identifying the silicon wafer images and sending identification signals to the sorting system; and the sorting system is used for executing the signals of the image processing system, sorting out defective silicon wafers and sorting the silicon wafers with the same defects into same sorting boxes to realize accurate sorting of the silicon wafers. The invention also provides a detecting method based on the solar silicon wafer defect detecting system disclosed by the invention; the silicon wafers can be conveyed rapidly and rapid defect detection of the silicon wafer images can be carried out; and a high-speed and high-precision visual detection requirement of the production line can be met.

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.

A system and method for improving the accuracy of a speckle-based image correlation displacement sensor provides ultra-high accuracy by ensuring that, in the absence of motion, the speckle image does not vary over time. In one embodiment, the speckle image is stabilized by reducing or compensating for laser diode wavelength changes. Various methods for stabilizing the wavelength include thermoelectric temperature control, measuring and correcting the wavelength by any suitable means, or providing a specific wavelength of light feedback from an external grating. Image stabilization may also be accomplished by monitoring the warm-up process of the system. Once the system is determined to have completed the warm-up process, an indicator is provided to the user to indicate that the system is ready for use. Sensor geometric configurations that reduce or eliminate wavelength-related errors are also disclosed.

A system for delivering pulses of a desired mass of gas to a tool, comprising: a mass flow controller including flow sensor, a control valve and a dedicated controller configured and arranged to receive a recipe of a sequence of steps for opening and closing the control valve so as to deliver as sequence of gas pulses as a function of the recipe. The mass flow controller is configured and arranged so as to operate in either one of at least two modes: as a traditional mass flow controller (MFC) mode or in a pulse gas delivery (PGD) mode. Further, the mass flow controller includes an input configured to receive an input signal; an output configured to provide an output signal; a communication port configured to receive program instructions; memory configured and arranged to receive programming data determining the programmed configuration of the mass flow controller as either a digital or analog configuration; and a processor / controller for operating the mass flow controller in accordance with the programmed configuration.

A system and method for improving the accuracy of a speckle-based image correlation displacement sensor provides ultra-high accuracy by ensuring that, in the absence of motion, the speckle image does not vary over time. In one embodiment, the speckle image is stabilized by reducing or compensating for laser diode wavelength changes. Various methods for stabilizing the wavelength include thermoelectric temperature control, measuring and correcting the wavelength by any suitable means, or providing a specific wavelength of light feedback from an external grating. Image stabilization may also be accomplished by monitoring the warm-up process of the system. Once the system is determined to have completed the warm-up process, an indicator is provided to the user to indicate that the system is ready for use. Sensor geometric configurations that reduce or eliminate wavelength-related errors are also disclosed.

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 discloses a high-pixel mini-typed optical automatic focusing system driven to focus by electromagnetic force, comprising a base; the technical key point of the system is that the base comprises a drawtube used for guiding; the chamber of the drawtube is internally provided with a lens seat which can move upwards and downwards along the drawtube; the lens seat is enwound by a plurality of coil turns; the drawtube is internally provided with a magnet; the lens seat is provided with a recovery spring; the seat can also comprise a bearing seat and an upper cover; the drawtube is sleeved on the bearing seat; the upper cover presses the drawtube and is subsequently connected with the bearing seat; the magnet has four magnetic blocks which are uniformly arranged at four corners of the drawtube. The invention aims at overcoming the shortages that the existing focusing system has low precision, large appearance and restricted photographing distance and providing a system which adopts the electromagnetic force driving and spring elasticity balance type to realize the automatic focusing of the high-pixel lens; the system achieves the action accuracy of the automatic focusing of the lens and the micromation of the automatic focusing system and solves the microspur photographing problem of the lens.

A system for measuring the drive power of car is composed of rotation speed sensor, drive shaft's torque measuring unit with infrared emitter, infrared receiver, data processing device, transmission lines and accumulator. Its measuring method features that the torque and rotation speed of drive shaft are simulataneously measured and then used to calculate the drive power of car. Its advantages are less investment in equipment and high correctness.

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.

The invention discloses a novel single-spindle pentahedron machining CNC milling machine, belongs to the field of numerically-controlled machine tools and relates to pentahedron machining tools. The novel single-spindle pentahedron machining CNC milling machine comprises a lathe bed, a stand column, a horizontal feeding system and a vertical feeding system. The vertical feeding system is connected with a spindle in a 360-degree rotating mode through a spindle indexing device. The horizontal feeding system is connected with a workbench indexing device in a 360-degree rotating mode. According to the novel single-spindle pentahedron machining CNC milling machine, a single-spindle pentahedron can be machined; meanwhile, machining transmission precision and indexing accuracy are improved, the machining range is widened, machining efficiency is improved and the machining cost is lowered.

A system and method are configured to deliver pulses of desired mass of gases. The system delivers a plurality of sequences of pulses of a desired mass of gas through at least two flow channels. The system comprises: a multi-channel fast pulse gas delivery system including (a) a plurality of flow channels, each channel comprising a flow sensor and a control valve, and (b) a dedicated controller configured and arranged to receive a recipe of one or more sequences of steps for opening and closing at least some of the control valves so as to deliver as a sequence of pulses of at least one gas through each of the corresponding channels as a function of the recipe. The method comprises: receiving at a dedicated controller from a host computer the prescribed recipe of one or more sequences of steps of pulses of one or more gases to be delivered through the plurality of flow channels; and using the sequence of steps to control each flow channel including a flow sensor and a control valve by opening and closing the control valve of each flow channel in accordance with the sequence of steps of the recipe.

Laser apparatus (1) comprising a reference source (2), a reference fibre (3), and at least one laser diode (4), wherein the reference fibre (3) comprises a core (5) having a refractive index n1 and a first cladding (6) having a refractive index n2, the first cladding (6) is surrounded by a second cladding (7) having a refractive index n3, the refractive index n1 is greater than the refractive index n2, the refractive index n2 is greater than the refractive index n3, the laser diode (4) emits laser radiation (8) that is guided through the first cladding (6) of the reference fibre (3), the reference source (2) emits reference radiation (9) that has a predetermined wavelength λR (10), the reference radiation (9) is guided through the core (5) of the reference fibre (3) to the laser diode (4), and the reference radiation (9) that is guided through the core (5) of the reference fibre (3) to the laser diode (4) has a power (11) at the predetermined wavelength λR (10), which power is greater than an injection locking threshold of the laser diode.

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.

A Long Lifetime Cold Cathode Ionization Vacuum Gauge Design with an extended anode electrode having an axially directed tip, a cathode electrode, and a baffle structure. The axially directed tip of the anode electrode can have a rounded exterior with a diameter at least 10% greater than the diameter of the anode electrode.

The invention belongs to the technical field of organic metal complex, in particular to a soluble organic metal complex and a preparing method and application thereof. The soluble organic metal complex has a structural formula shown in the description, wherein R1 is carboxyl, ester group, aminopropyl, propyl methyl phosphate, phosphate and boric acid ester; R is (CH2)8COOCH2; x is 1-10, n is 1-10 and M is ferrum, copper, zirconium or aluminum. The soluble organic metal complex is good in compatibility with silicone rubber and low in additive amount without affecting transparency of the silicone rubber, and can improve the high temperature resistance of the silicone rubber. The soluble organic metal complex is simple in preparing method, low in preparing cost, high in yield and high in product purity.

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.

The invention discloses a preparation method of low-specific surface area submicron aluminum oxide. The preparation method is characterized by comprising the following steps: S1, selecting a raw material: taking the conventional calcined aluminum oxide in the market, wherein the crystal form is an alpha crystal form and the aluminum oxide content is higher than 99%; S2, grinding: grinding the calcined aluminum oxide till the median particle size of 0.1-1 micron by a wet ball milling technology; S3, drying: drying the aluminum oxide treated by the wet ball milling technology to remove moisture;S4, calcinating at low temperature: calcinating the dried aluminum oxide at 900-1200 DEG C; S5, crushing: crushing the aluminum oxide calcinated at low temperature by a dry crushing technology, namely depolymerizing a product after low-temperature calcination till a submicron scale in the form of original crystal grains to obtain a finished product. The invention provides the preparation method of low-specific surface area submicron aluminum oxide, which is simple and easy to implement and by which the product quality is stable and scale production can be achieved.

The invention discloses a mmethod for obtaining analogous retinal tissues rich in cone and rod cells by using human induced pluripotent stem cells. The method comprises the following steps: digestinghiPSCs to obtain cell pellets, and then carrying out suspension cultivation on the cell pellets to obtain an embryoid body; reinoculating the embryoid body into a culture dish enveloped by Matrigel, and carrying out induced differentiation inside an induced cultivation solution to obtain nerve retina (NR) and RPE; stirring up the NR and the RPE, carrying out suspension cultivation to obtain 3D analogous retina comprising NR tissues, then carrying out continuous suspension cultivation inside an optimized culture solution without retinoic acid, carrying out NR differentiation on all retinal cells, comprising highly matured photoreceptor cells, Rhodopsin positive rod cells, L / M OPSIN positive red and green cone cells and S-OPSIN positive blue cone cells, and thus particularly obtaining the analogous retinal tissues rich in red and green cone and rod cells.

The invention discloses a preparation method of black titanium dioxide powder. The preparation method comprises the following steps that ascorbic acid powder and titanium dioxide powder are taken formixing and grinding to obtain mixed powder; the mixed powder is sintered in a nitrogen atmosphere to obtain a sintering body; the obtained sintering body is naturally cooled to 50-55 DEG C, then fullywashed, and the washed sintering body is obtained; and the obtained washed sintering body is dried to obtain the black titanium dioxide powder. By using the preparation method, the bright black titanium dioxide powder is successfully prepared; the black titanium dioxide powder is uniform in color distribution, higher in product brightness, good in high temperature and chemical stability, and hasno possibility of color dilution in use; the black titanium dioxide powder is simple in process method, high in practicality, low in production cost, low in requirements for equipment, high in production efficiency, short in time consuming, complete in reaction, high in quality, and is conducive to large-scale production; and the used raw materials are environment friendly and safe without safetyand environmental problems, and the energy consumption is low.

A method for performing pedestrian detection with aid of light detection and ranging (LIDAR) is provided. The method includes: obtaining 3-dimensional (3D) point cloud data through the LIDAR; performing ground separation processing on the 3D point cloud data to remove ground information; performing object extraction processing on the 3D point cloud data to obtain 3D point cloud chart that includes pedestrian candidate point cloud group; performing 2-dimensional (2D) mapping processing on the 3D point cloud chart to obtain 2D chart; and extracting 3D feature and 2D feature from the 3D point cloud chart and the 2D chart, respectively, and utilizing the 3D feature and the 2D feature to determine location of the pedestrian. According to the method, image data obtained by the LIDAR may be enhanced, the method may distinguish between pedestrian far away and environment blocks, and pedestrian recognition in nighttime or in bad weather may be improved.