205results about How to "Improve test repeatability" patented technology

The invention discloses a high-concentration fast preparation method for silver nanowires. The method comprises the following steps of: under the protection of inert gas, adding high-concentration silver nitrate glycol solution and polymer glycol solution into pre-heated glycol solution, and adding copper chloride serving as control agent at the same time so as to obtain mother liquor of the silver nanowires; and performing centrifugal separation and purification on the mother liquor so as to obtain pure silver nanowires diffused in ethanol solution. The high-concentration fast preparation method for silver nanowires has the advantages of high efficiency, low cost, simple process, high repeatability, high stability, fast reaction, high yield and adjustable and controllable shape and size of the silver nanowires, and makes the large-scale fast preparation and the application and research of the silver nanowires possible.

The invention discloses a full-automatic multi-channel cigarette drop tendency detection device and a detection method. The detection device is characterized by comprising a multi-channel rotating disc structure unit, an automatic cigarette sample feeding unit, an automatic cigarette sample ignition and combustion line detection unit, a tested cigarette clamping and stressing unit, an automatic drop detection and taking unit, a smoking fume capturing unit during smoking, a smoking unit and a fume exhaust unit which are arranged in a main body frame, and a circuit and gas path control unit forcontrolling action and process of the units. By adopting the detection device, according to certain steps, cigarette samples sequentially inserted into a rotating disc are automatically ignited, combustion lines are detected, controllable external force is applied to the combusting cigarette samples, and cigarette drop tendency of the cigarette products is detected according to the phenomena of drops of multiple cigarette samples. By adopting the detection device, the testing repeatability and the working efficiency can be improved.

The present invention relates to a non-symmetrical stretcher forming die equipment capable of inducing resilience of plate material. It includes the following several portions: male die, female die, blank holder, male die fixing plate, femal die baseplate, lower die plate, upper die plate, upper die baseplate, pushing block and spring. Said invention also provides the connection mode of all the above-mentioned portions and the working principle of said die equipment.

Disclosed are a source stirring electromagnetic reverberation chamber and a stirring method thereof. The reverberation chamber includes an electromagnetic shielding chamber, a source stirring device installed on the side wall of the electromagnetic shielding chamber, and the source stirring method used for describing installation, motion and control method of an transmitting antenna. Simultaneous change of the position and polarization direction of the transmitting antenna is realized through control of a rotating shaft to rotate. A drive device of the rotating shaft is installed at the outer side of the reverberation chamber and the rotating shaft which is installed on the inner wall of the reverberation chamber is driven to rotate through a changeover mechanism. The reverberation chamber realizes field uniformity in the reverberation chamber through rotation of a single antenna so that space utilization rate in the reverberation chamber is effectively improved and a source stirring reverberation chamber of the same volume can realize a larger test area; relative to an EUT of the same size, a source stirring reverberation chamber which is smaller in volume can be designed so that generation of high field intensity is better facilitated; and the reverberation chamber is also applicable to a condition in which a plurality of transmitting antennae are configured in a reverberation chamber to carry out source stirring.

The invention provides a mixing stirring device of mechanical stirring and source stirring of an electromagnetic reverberation chamber. The mixing stirring device comprises the electromagnetic reverberation chamber and further comprises a mechanical stirring assembly and a source stirring assembly, wherein the mechanical stirring assembly and the source stirring assembly are arranged on the side wall of the electromagnetic reverberation chamber. The mechanical stirring assembly comprises a first motor and a mechanical stirrer connected with the first motor; the source stirring assembly comprises a second motor, a rotary shaft connected with the second motor and a transmitting antenna disposed on the rotary shaft. By means of combination of a mechanical stirring device, a source stirring device and a method, change of electromagnetic field distribution in the reverberation chamber depends on more variable changes which include changes of the length, the width and the height of an equivalent reverberation chamber and changes of the position of an excitation current source or/and orthogonal coordinate components of current density, and therefore more choices are provided for further improving field uniformity of a testing area in the reverberation chamber so that performance of the reverberation chamber is more likely to be improved.

The invention relates to a tissue culture and rapid propagation method of rhododendron latoucheae. A woody plant medium (WPM) is taken as a basic culture medium, and a tissue culture and rapid propagation system of the rhododendron latoucheae is established through the isolated culture of the rhododendron latoucheae by proportioning regulation of different hormones. The method sequentially comprises the following steps of: selecting an explant; disinfecting; performing primary culturing; performing propagation culturing; performing rooting cultivation on a strong seedling; and transplanting to obtain a test tube seedling which can keep the original plant genotype, has a high aesthetic property and is better differentiated, wherein a primary induction culture medium of the explant is WPM+IBA 0.15mg/L+TDZ 0.3mg/L+cane sugar 30g/L and the pH value is 5.6; a propagation culture medium of an adventitious bud is WPM+IBA 0.15mg/L+TDZ 0.3mg/L+cane sugar 30g/L and the pH value is 5.6; and a rooting culture medium of the strong seedling is 1/2WPM+IBA 0.5mg/L+NAA 0.2mg/L+cane sugar 20g/L+activated carbon 0.3g/L and the pH value is 5.6. By the method, the propagation speed of the rhododendron latoucheae is greatly increased; and the method is suitable for industrialized commercial production of the rhododendron latoucheae.

The invention relates to a single-wheel soil bin test stand which comprises a soil bin system, a driving system, a dragging system, a control system and a data acquisition system. The driving system comprises a driving support. The driving support is a rectangle frame; the inner side of the rectangle frame is provided with a linear bearing; the linear bearing is internally provided with a vertical guide rod; the lower end of the vertical guide rod is equipped with a bottom board; the bottom board is provided with a vehicle wheel fixation shaft support base; the vehicle wheel fixation shaft support base is internally provided with a vehicle wheel fixation shaft; the vehicle wheel fixation shaft is sleeved by a second deceleration chain wheel; the second deceleration chain wheel is connected with a second driving chain wheel; the second driving chain wheel is connected with a first deceleration chain wheel; the first deceleration chain wheel is connected with a first driving chain wheel arranged on a driving motor; the dragging system comprises a dragging motor; an output shaft of the dragging motor is provided with a first driving gear; the first driving gear is connected with a first reduction gear; the first reduction gear is connected with a second driving gear; and the second driving gear is connected with a second reduction gear. According to the single-wheel soil bin bed stand, development cycle of a vehicle can be reduced effectively, and research speed is accelerated.

The invention relates to a method for preparing a degradable magnesium alloy implant material. In the method, (CH3COO)2Ca is added into a base electrolyte to serve as a calcium source, and a phosphate is also added in the base electrolyte to serve as a phosphorus additive to prepare an electrolyte; a magnesium alloy is placed in the electrolyte to serve as an anode; a microarc oxidation power supply is used for supplying electricity, wherein the power supply frequency range is 400-600Hz, the positive duty ratio is 30-50%, the negative duty ratio is 10-30%, and the ratio of the number of the positive pulses to the number of the negative pulses is 1:1; and the degradable magnesium alloy implant material is obtained through electrified reaction under a constant pressure or constant power mode. The implant prepared by the method in the invention has a surface composed of a loose layer and a compact layer, the loose layer surface is distributed with multiple micropores, and the compact layer is in good metallurgic bonding with a basal body so as to ensure a coating to have high hardness, compactness and cohesion as well as good resistance to wear and corrosion; and at the same time, mice acute toxicity tests prove that the coating has good biocompatibility, and simulated body fluid (SBF) soaking tests prove that the coating has good bioactivity, thus the degradable implant materialhas a wide prospect.

The invention relates to a transformable array electrode type remediation device for heavy metal polluted soil. The device is characterized in that a soil chamber is arranged around a central electrode chamber, and the soil chamber and the central electrode chamber form concentric circles; a PRB (Permeable reactive barrier) is arranged in the concentric circles in the direction vertical to the electric field direction, and the central electrode chamber and the PRB form concentric circles; the space between the central electrode chamber and a PRB body is filled with a medium filler; six hollowvertical column type anode chambers are uniformly distributed on a circular arc of the soil chamber and are treated as surrounding electrode chambers; filtering nets are attached to the soil chamber,the anode chambers, the PRB, and the inner walls, adjacent to cathode chambers, of the PRB; electrodes are arranged in the anode chambers and the cathode chambers. According to the device, the array electrode arrangement mode is adopted, so that the remediation efficiency is improved; the remediation period is reduced; the size of the electrode chamber is adjustable; the electrodes can move, thusthe device can be switched among different remediation ranges, and as a result, the practicability is high; the electric remediation mode and the PRB are combined, so that the heavy metal in the soilcan be efficiently removed.

The invention discloses a closed coaxial transmission line test system for testing dielectric property of liquid and solid materials. The closed coaxial transmission line test system comprises a test fixture, a vector network analyzer, a computer and a test connection line. The test fixture comprises a both-way SMA connector, screws, waterproof rubber washers, adapters, the two ends of each of which are opened and which are in a communication structure, a sample room having an electromagnetic shielding effect, a sample indoor conductor and a sample to be tested. The both-way SMA connector is formed by four-hole flanges, columnar cylindrical polytetrafluoroethylene and both-way SMA connector dual-female-connector coaxial inner conductors. Based on the organic combination of a transmission reflection method and de-embedding technology, test parasitic effect of a fixture interface is eliminated under the condition of not depending on a special customized calibration device or not carrying out complex mathematical modeling, thereby realizing accurate measurement of the dielectric property of the liquid and solid materials; processing requirement for the test sample is low; the fixture installation is simple; test work frequency range is flexible to expend; and application range is wide.

The invention discloses a water comprehensive characterization method for oil-containing sludge. According to the conventional measurement method, the measurement time is long, the efficiency is low and the operation is complicated, samples cannot be repeatedly tested, and toxic and organic chemical solvents are used in a measurement process. According to the water comprehensive characterization method, an oil-containing sludge sample with a certain weight is directly and flatly arranged at the bottom of an experiment container; temperature is controlled by a dynamic stability control (DSC) temperature control program; the oil-containing sludge is measured by a differential scanning calorimety, so that heat flow of crystallization and melting of emulsified water in the oil-containing sludge at different temperatures can be obtained; the stability and the salt content of the emulsified water in the oil-containing sludge can be quantitatively judged according to a DSC curve; the water content and the water drop distribution of the oil-containing sludge sample are quantitatively calculated according to the DSC curve and a formula. The water comprehensive characterization method can quickly obtain information such as the stability of the oil sludge, the water content, the water drop distribution and the salt content, and is high in measurement repeatability and low in measurement cost.

The invention belongs to the technical field of building material detection, particularly relates to a detection method of early autogenous shrinkage of cement mortar, and solves the problem of the testing of early autogenous shrinkage of cement mortar. The size of the autogenous shrinkage of cement mortar at an early stage is reflected mainly by directly measuring the volume change of the cement mortar over time. By using the method, the autogenous shrinkage of the cement mortar at an early stage can be measured accurately, and the method is also applicable to the measurement of early autogenous shrinkage of cement purified pulp. The invention is applicable to practical production and scientific research.

The invention provides a method for measuring ohmic contact resistivity between black silicon material and metal electrodes. The method provided by the technical scheme comprises the following steps of: aiming at the black silicon material which is obtained by etching the mono-crystal silicon surface, depositing at least six dot-shaped metal electrodes on the surface of the black silicon material by adopting the ohmic contact preparation technology; depositing the metal counter electrodes on the back surface of the mono-crystal silicon; leading an ultrafine metal wire from the inner contact cycle of each dot-shaped metal electrode by adopting the hot pressure welding technology; respectively bonding the metal wires on the outer-leading electrodes of which the areas are large; continuously supplying constant reverse voltage bias between each dot-shaped metal electrode and the counter electrode by adopting a variable voltage source so as to ensure that the heterojunction of the black silicon/ mono-crystal silicon is completely offset; and under the condition that the heterojunction of the black silicon/ mono-crystal silicon is completely offset, testing the contact resistivity of the metal/black silicon by using a dot-shaped transmission line mode method.

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 provides a wavelength modulation optical fiber acoustic sensor which comprises a laser, an optical fiber FP (fabry-perot) interference cavity acoustic probe, a first photoelectric detector and a signal processing and controlling module, wherein a laser power supply provides driving current to the laser, and the wavelength of the laser can be continuously adjusted; laser emitted by the laser is reflected after entering the optical fiber FP interference cavity acoustic probe, and an optical signal is output; the first photoelectric detector is used for receiving the optical signal output by the optical fiber FP interference cavity acoustic probe; the signal processing and controlling module is used for determining the optimal working wavelength of the wavelength modulation optical fiber acoustic sensor according to a direct current component of the output signal of the first photoelectric detector, and regulating the output wavelength of the laser to be the optimal working wavelength of the wavelength modulation optical fiber acoustic sensor by controlling the laser power supply to apply a driving current value corresponding to the optimal working wavelength to the laser. When the wavelength modulation optical fiber acoustic sensor is used, the optimal working wavelength is automatically selected without manual operation and calibration, so that the wavelength modulation optical fiber acoustic sensor is convenient to use and high in environmental adaptability.

The invention provides a conditioning device for a transmitting excitation signal in a T/R assembly test system. The conditioning device comprises a T/R assembly, a switch network, a vector network analyzer and a signal generator. The switch network is connected with the signal generator, the vector network analyzer and the T/R assembly; the switch network comprises an amplifier, a control module and a plurality of switches; and the control module is connected with the amplifier and the switches. A jumper wire connected at source ports of the vector network analyzer is disassembled; the source output end and the source input end of the vector network analyzer are connected through two single-pole double-throw switches; a second amplifier is connected between the two single-pole double-throw switches; in such mode, the amplifier is introduced to the input end of a reference directional coupler arranged in the vector network analyzer, so that when the vector network analyzer is an emission source of the excitation signal, the power of the output excitation signal is enlarged, and meanwhile, calibration of the full two-ports and test of reflection parameters are guaranteed, and accuracy of the transmission parameter test is improved favorably.