100results about How to "Stability determination" patented technology

The invention relates to a measuring method of the catalytic cracking slurry solid content. The measuring method comprises the following steps of: preheating, stirring and sampling the slurry, adding certain amount of preheated diluent in the slurry and uniformly stirring; carrying out vacuum filtration on the mixed oil sample, and filtering out undissolved substances on a piece of filter paper; extracting the filtered filter paper by using toluene till an extracting solution is colourless; and carrying out vacuum drying, cooling and weighing on the filter paper after extracting, and figuring out the solid content in the tested slurry according to the mass variation of the filter paper. The measuring method of the catalytic cracking slurry solid content provided by the invention realizes the purpose of stably and accurately measuring the solid content of slurry, and solves the problems of low precision and poor stability in actual measurement of the catalytic cracking slurry solid content, thus providing technical support for purification and utilization of slurry and monitoring on safe and stable operation of a catalytic cracking unit.

It is presented a method for determining whether a portable key device is located in an active area in relation to a barrier. The method is performed in an access control device and comprising the steps of: detecting a first angle of arrival of a wireless signal from the portable key device using a first pair of separated antennas; detecting a second angle of arrival of a wireless signal from the portable key device using a second pair of separated antennas; determining a first pair of directions based on the first angle of arrival; determining a second pair of directions based on the second angle of arrival; determining a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions; and determining whether the portable key device is located in the active area based on the position.

A pulse wave measuring apparatus is disclosed, in which a sensor unit can be fixed easily under an appropriate pressure at an appropriate position on a living organism. With the living organism fixed by a living organism fixing device, a pressure sensitive portion arranged on the sensor unit is pressed against the living organism thereby to measure the pulse wave. The living organism fixing device includes a fixing stand for fixing the living organism in position, and fastening bands for connecting the fixing stand and the sensor unit and fastening the living organism fixedly to the fixing stand while at the same time activating by pressing the sensor unit against the living organism. The fastening bands include a first band portion with one end mounted on the sensor unit and the other end mounted on the fixing stand and a second band portion with one end mounted on the sensor unit and the other end removably mounted on the fixing stand. The fixing stand has a constant force spring for pulling the other end of the first band portion with a constant force.

The invention belongs to the field of biological detection and specifically relates to a triple test diagnostic kit for breast cancer of tumor serum markers CA125, HE4 and P-her2. The triple test diagnostic kit for breast cancer provided by the invention mainly comprises an abzyme elisa plate, a biotin antibody enveloped plate, bovine serum albumin, serum diluent, horse radish peroxidase, tetramethyl benzidine, sulfuric acid, negative control liquid and positive control liquid. The triple test diagnostic kit for breast cancer provided by the invention can be used for detecting the expression levels of CA125, HE4 and P-her2 in the body of the patient after operative treatment or the relapsing and metastatic tumor patient; the triple test diagnostic kit for breast cancer has important significance in clinical diagnosis of breast cancer; the triple test diagnostic kit for breast cancer provided by the invention can reduce the interference of other matters in serum, can greatly increase the accuracy and stability of detection result and is beneficial to the early diagnosis and prognosis treatment of the patient suffering from breast cancer.

The invention discloses a stability determination method of an oil-water emulsion, and the determination method comprises the following steps: preparing the oil-water emulsion; applying an electric field to the oil-water emulsion; measuring a response time period tA from the application of the electric field to the generation of current in the electric field, and/or measuring a peak tail current value IE when the current in the electric field converges into a constant value after a current peak value Imax; and using the response time period tA and/or the peak tail current value IE as the stability determination results of the oil-water emulsion. The invention also discloses an application of the stability determination method of the oil-water emulsion provided in the invention in demulsification effect evaluation of a demulsifier, an application of the stability determination method of the oil-water emulsion provided in the invention in crude oil demulsification performance evaluation, and a stability determination device (100) of the oil-water emulsion.

The present invention relates to a vibration sensor tunnel on-line monitoring system based on wireless network transmission. The system comprises a monitoring system upper computer, at least four wireless vibration sensors and a mobile device terminal. The wireless vibration sensor is installed on the tunnel, and the monitoring system upper computer is connected with the wireless vibration sensor and the mobile device terminal; and the wireless vibration sensor records the vibration data of two directions of the tunnel in real time, the data is transmitted to the monitoring system upper computer through the wireless network, the monitoring system upper computer stores and displays the actual engineering data of the vibration signals, and the monitoring system upper computer makes out the real-time line chart of the vibration system according to the collection data, and a mobile terminal employs the wireless network to remotely access the monitoring system upper computer and reads the collected monitoring data. Compared to the prior art, the vibration sensor tunnel on-line monitoring system based on the wireless network transmission can couple the vibration signals of the two directions, actually reflect the vibration condition in the tunnel, and is fast in response time and low in resource occupancy rate, etc.

According to an embodiment, a laser processing apparatus (100) has: a laser light source (11); a light collector (12); a water transmitter (5); a sound sensor (10); a time-width acquirer (31); and a distance calculator (32). The laser light source (11) emits the laser light (11a). The light collector (12) collects the laser light (11a) on a workpiece (1). The water transmitter (5) supplies a water stream (5a) to a surface to be treated of the workpiece (1). The sound sensor (10) is provided at a predetermined position relative to at least one of the water transmitter (5) and the light collector (12), and receives a sound coming from the surface to be treated. The time-width acquirer (31) detects time width from a reference time point to a time point when the sound sensor (10) receives the sound. The distance calculator (32) calculates a distance from one of the water transmitter (5) and the light collector (12) to the surface to be treated.

The invention relates to a method for determining the concentration of stable dispersion water solution C60. The method comprises the steps of firstly, preparing different concentrations of C60-Toluene standard solution, determining the absorbance at the wavelength of 334-336nm, performing linear regression to the concentration values and corresponding absorbance value, thus obtaining a standard curve; then taking stable dispersion water solution C60 to be determined, adding calcium chloride solution and toluene, wherein the ratio of the stable dispersion water solution to calcium chloride solution to toluene is 1:(0.5-1):(0.5-2); sealing, performing ultrasonic dispersion for 10-15min to form white emulsion, oscillating and standing to obtain a two-layer solution, freezing for 30-60min in the condition of minus 20 DEG C so as to entirely condense the water phase to be in a solid state and keep an organic phase under a liquid state; entirely absorbing the organic phase solution, determining the absorbance, and calculating the concentration of the C60 according to the standard curve; repeating the steps, adding the concentrations of the C60 obtained by twice extraction, thus obtaining the final determined concentration of the stable dispersion water solution C60 to be determined. The method is simple and fast to operate, and capable of performing batch determination.

The invention discloses an oncoprotein P185 detection kit. The oncoprotein P185 detection kit comprises oncoprotein P185 monoclonal antibodies, an elisa plate, a positive reference substance, a negative reference substance, cleaning liquor, a stop buffer, horse radish peroxidase-chain avidin and a developing substrate thereof, wherein the oncoprotein P185 monoclonal antibodies comprise an oncoprotein P185 monoclonal antibody enveloped on the elisa plate and the oncoprotein P185 monoclonal antibody marked by biotin. The oncoprotein P185 detection kit disclosed by the invention can be adopted for effectively and stably measuring oncoprotein P185 level in human serum, is high in sensitivity and precision, and good in test repeatability.

Ambiguous distinction of PSFs between positions in front of and behind an imaging point corresponding to a distance to an object is eliminated without decreasing the amount of light to be exposed, and the distance to the object is estimated from a small number of captured images. An imaging apparatus includes: an imaging device which captures an image; an optical system for forming an image of an object on the imaging device; a birefringent substance having a birefringence effect; and a distance measurement unit which measures a distance from the imaging device to the object, using the captured image and a point spread function having a form changed by the optical element between positions in front of and behind an image point corresponding to the distance to the object.

The present invention relates to a film thickness measuring method that detects a film thickness by analyzing optical information contained in light reflected from a substrate. The film thickness measuring method includes the steps of generating a spectral waveform showing the relationship between the strength and wavelength of the reflected light from the substrate (W), determining the intensity of the frequency component and corresponding film thickness by performing a Fourier transformation process on the spectral waveform, determining the plurality of maximal values (M1, M2) of the intensity of the frequency component, and selecting one film thickness according to a selection standard from film thicknesses (t1, t2) corresponding respectively to the maximal values (M1, M2). The selection standard is either selecting the Nth largest film thickness or selecting the Nth smallest film thickness, wherein N is a natural number defined beforehand.

The invention belongs to the biological detection field, and concretely relates to a breast cancer triple rapid detection kit of tumor serum markers CA125, HE4 and P-her2. The breast cancer triple rapid detection kit is mainly composed of an antibody coated well, a biotin antibody coated plate, a serum dilution solution, a horseradish peroxidase, tetramethyl benzidine, hydrochloric acid, a negative reference liquid and a positive reference liquid. The breast cancer triple rapid detection kit can detect the expression level of the CA125, HE4 and P-her2 in postoperative patients or recurrent or metastatic tumor patients, and is of great significance to clinic diagnosis of the breast cancer. The breast cancer triple rapid detection kit reduces interference of other substances in serum, greatly improves the accuracy and the stability of a detection result, and facilitates the early stage diagnosis and the prognosis treatment of the breast cancer patients.

The present invention provides a polarographic residual chlorine sensor capable of reducing the change over time of the electrode surface area of a working electrode. The polarographic residual chlorine sensor determiners the residual chlorine concentration by at least immersing the working electrode (2) and a counter electrode in the water to be measured, and measuring the current flow between the working electrode and a counter electrode caused by an oxidation-reduction reaction. The cross-sectional areas of a conductive material (16) constituting the working electrode perpendicular to the axial direction at different positions are the same shape, and are covered by a casing (17) in the manner of leaving axially two end faces, and an end face is immersed in the water to be measured.

The invention discloses a method for quantitatively detecting glial fibrillary acidic protein (GFAP) in a blood serum. The method comprises the steps of firstly, purifying a resin connecting antibody Ab1 through protein A/G agarose, capturing GFAP (Glial Fibrillary Acidic Protein) in the blood serum to form PA/G-Ab1-GFAP, and centrifugally cleaning to achieve the aims of separation and enrichment; secondly, adopting citric acid as a carbon source and diethylenetriamine as a passivator for synthesizing carbon dots (CDs), connecting with an antibody Ab2 through an amido bond, and forming a fluorescence labelled probe CDs-Ab2; then combining the PA/G-Ab1-GFAP and the CDs-Ab2 to form a sandwich structure PA/G-Ab1-GFAP-Ab2-CDs, detecting fluorescence intensity, and obtaining the content of the GFAP in the blood serum according to a standard curve. The method provided by the invention has the advantages of high sensitivity and simplicity and convenience in detection, and the characteristics of high selectivity and high affinity of immunoreaction, and can be directly applied in determining the GFAP in the blood serum.