40results about How to "Improve accuracy and repeatability" patented technology

A circuit receives a first signal (for example, a baseband signal) and mixes it with a local oscillator (LO) signal, and outputs a second signal (for example, an RFOUT signal). The circuit includes multiple identical Mixer and Frequency Divider Pair (MFDP) circuits. Each MFDP can be enabled separately. Each MFDP includes a mixer and a frequency divider that provides the mixer with a local version of the LO signal. The MFDP outputs are coupled together so that the output power of the second signal (RFOUT) is the combined output powers of the various MFDPs. By controlling the number of enabled MFDPs, the output power of the second signal is controlled. Because the MFDPs all have identical layouts, accuracy of output power step size is improved. Because LO signal power within the circuit automatically changes in proportion to the number of enabled MFDPs, local oscillator leakage problems are avoided.

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.

An analytical instrument for making measurements based on detection of an SPR resonance minimum or a refractometer transition shadowline on a detector array is improved by configuring a diaphragm of the instruments illumination system to include a first aperture, a second aperture, and an opaque region between the first and second apertures, wherein the opaque region of the diaphragm casts a shadow on the detector array to provide a reference minimum from which a relative location of the resonance minimum or transition shadowline is measurable. By establishing a reference minimum on the detector array as a reference location for relative measurement, the instrument compensates for signal drift and other instrument variations. The diaphragm may include additional apertures and opaque regions for generating additional reference minima over the extent of the detector array.

The invention discloses a monitoring test piece for ion implantation process, comprising a underlay having the a impurity type contrary to that of the ion implantation process to be monitored, besides, the underlay is provided with a pre-doped layer having a same impurity type as that of the ion implantation process to be monitored, the thickness of the pre-doped layer is more than the implantation depth of the ion implantation process to be monitored. The monitoring method of the ion implantation process is realized by the monitoring test chip, by which the problem that current shallow junction ion implantation process is difficult to be monitored is solved, and the monitoring to the shallow junction ion implantation process is improved.

The invention relates to a method for producing a multi-stage microreflecting mirror by controlling the growth of a multi-layer film, which comprises the following steps that: a substrate is produced and is treated with cleaning; a first photomask is used to photoetch for forming a needed masking pattern, the width of a bright fringe and the width of a dark fringe of the first photomask are respectively L / 2<1>; then coating material is deposited, photoresist and a film on the photoresist are peeled off, and a multi-stage film staircase is formed; each film layer staircase is orderly produced according to the method, the width of a bright fringe and the width of a dark fringe of the nth photomask are respectively L / 2<n>, until the needed staircases are reached to finish the production of the substrate of a multi-stage microreflecting mirror; the produced substrate of the multi-stage microreflecting mirror is used as a template production mould, then a die casting method is used to produce a multi-stage staircase structure; and the surface of the multi-stage staircase structure or the substrate of the multi-stage microreflecting mirror is coated with a reflection increasing film. The method effective improves the longitudinal dimension accuracy and the repetitiveness of the staircase, has strong process controllability and good repetitiveness, does not use chemical etching, and reduces the pollution.

The invention discloses a modeling method for grading quality of Xinjiang red dates in a near infrared range, which relates to modeling methods for grading quality of natural products in the near infrared range, and solves the problem that the prior randomly selected red date sample near infrared ranges differ greatly, main spectrum characteristic factors influencing spectrum change cannot be separated, and consequently, the grading modeling effect is poor. The modeling method provided by the invention comprises the following steps of: initially choosing appearance characteristics of samples, then, scanning the red date samples of same batch one by one; obtaining average spectrum of the batch of red date samples after performing proper spectrum treatment, and comparing the average spectrum with an original sample spectrum chart to screen the samples according to similarity so as to select the samples with greater spectrum difference, performing spectrum scanning again on the residual samples, and repeatedly adjusting and gradually subdividing the residual samples, until the spectrum difference of the batch of samples is in a needed accuracy range; and encoding the separated characteristic factors to create a sub-model. With the method, the characteristic factors of the Xinjiang red dates are successfully separated, and the sub-model is successfully created, so that the method provided by the invention is suitable for grading the quality of fruits, such as red dates, apples, pears and the like.

The invention discloses a detection method for urinary proteome, which includes the steps of preparation of urinary protein, separation at protein or peptide level, and mass spectrum identification. The method of preparation of urinary protein includes steps of: 1) performing ultracentrifugation to a urine sample at normal temperature for a certain time and rejecting the supernatant and maintaining a precipitate; 2) adding a proper amount of resuspending buffer liquid to the precipitate in the step 1) to re-suspend the precipitate; 3) adding a reducing agent, which can break a disulfide bond,to the resuspension liquid and heating the resuspension liquid for 10-60 min at 37-80 DEG C; 4) adding a cleaning buffer solution to the solution in the step 3) and performing high-speed centrifugation for a certain time, and rejecting the supernatant and maintaining a precipitate; 5) re-dissolving the precipitate in the step 4) with a digestive buffer solution, and performing in-solution enzymolysis to proteins or performing protein separation through one-dimensional electrophoresis (SDS-PAGE). The method simplifies preparation process of urinary protein and improves accuracy and repeatability of detection. The method can be used for high-throughput quantitative deep detection of the urinary proteome.

The present invention discloses a data collection and signal processing method and a data collector. According to the method, after collected original signals are subjected to denoising, and the signals are subjected to quadratic linear integral operation to obtain an integral value, namely a signal final processing result; and the original signals are acceleration signals, and the integral valueobtained through the quadratic linear integral operation is a displacement amplitude. The linear integral operation is employed to perform processing of signal data to obtain the displacement amplitude, and therefore, accumulative errors caused by traditional integration can be effectively avoided.

The present invention belongs to the technical field of medical instruments, and specifically relates to a traditional Chinese medicine pulse manifestation acquisition apparatus. The apparatus comprises a sensor array, a multipath signal conditioning circuit, a multipath synchronous A / D circuit and a single chip microcomputer; the sensor array comprises pulse sensors and noise sensors, and the noise sensors are used for acquiring vibration noise data introduced by a body; the multipath signal conditioning circuit is used for filtering and amplifying signals acquired by the sensors; the multipath synchronous A / D circuit is used for synchronously acquiring the signals processed by the multipath signal conditioning circuit in real time and converting the signals into digital signals; and the single chip microcomputer is used for sending the converted digital signals into an intelligent terminal. The present invention also provides a noise reduction system and a noise reduction method. The pulse sensor data are corrected by utilization of noise sensor data, interference of vibration noise on a traditional Chinese medicine pulse manifestation instrument can be effectively reduced, and therefore repeatability and accuracy of pulse manifestation instrument diagnosis can be improved.

The invention discloses a method for high-flux assay of phytase activity in a transgenic phytase crop seed. The method comprises the following steps: (1) building a phosphorus standard curve based on a phosphorus content as a horizontal coordinate and a light absorption value as a vertical coordinate; (2) leaching out phytase in a sample to be assayed so as to obtain leach liquor of phytase; (3) carrying out enzyme activity assay reaction of phytase on the leach liquor of phytase in a microplate with 96 holes; and (4) assaying the light absorption value of a reaction solution, calculating the phosphorus concentrations of various samples to be assayed according to a linear regression equation corresponding to the phosphorus standard curve, calculating the phytase activities of the samples to be assayed according to an enzyme activity calculation formula. Accuracy and sensitivity testes show that the assayed result obtained by using the method has good accuracy, small error, high stability and good repeatability, and coefficient of variation of the assayed result obtained by using the method is far lower than that obtained by the existing microplate method. The assay method disclosed by has the advantages of high flux, high assay efficiency, low cost, high accuracy and the like, and is easy to operate.

The invention discloses a temperature sensor dynamic calibration system based on double pulse lasers. A pulse time-delay trigger triggers two single-pulse lasers in a time-sharing manner, so that two laser pulses of the two single-pulse lasers are irradiated on a temperature sensor to be calibrated through respective light path systems, the temperature sensor is externally connected with a high-time-resolution dynamic signal acquisition system which is used for acquiring corresponding signals of the temperature sensor, and calibration of the temperature sensor is completed through the interval of the peak-to-peak value of the response signal and the time interval of the trigger signal. According to the method, the thermal response dynamic characteristics of the sensor are determined through the time relative deviation between the standard double-pulse signal time interval of the pulse delay trigger and the response signal peak-to-peak value interval of the temperature sensor, and the influence of pulse quality such as monopulse laser power, transverse mode and longitudinal mode distribution and the like on the calibration result is avoided.