Method for separating and extracting fetal electrocardiogram by adopting multi-lead signal fusion mode

The invention discloses a method for separating and extracting a fetal electrocardiogram by adopting a multi-lead signal fusion mode, which comprises the following steps of: (1) reading synchronously acquired one path of abdomen lead electrical signals of a pregnant woman and multiple paths of limb lead or chest lead electrical signals serving as reference signals; (2) forming a phase space based on the read abdomen lead signals and the reference signals, and sequentially connecting state points in the phase space according to a time sequence to form an evolution orbit with certain periodical property; (3) for each state point in the phase space, finding periodical association points closest to the state point on different orbits; (4) establishing a linear or nonlinear regression model between the abdomen lead signals and the reference signals in sample points by using the periodical association points of each state point as the sample points to realize regression estimation of maternal ...

Fiber-based turbidity measuring method and apparatus

The invention provides a fiber-based turbidity measuring method which comprises a light source, a conducting optical fiber, an optical probe and a detector, wherein a light signal transmitted from the light source enters the conducting optical fiber after being modulated by virtue of a light intensity modulation technology; the modulated light signal is transmitted to the optical probe by virtue of the conducting optical fiber; the light signal entering the conducting optical fiber is transmitted through a to-be-detected solution and is converged and enters the conducting optical fiber, and by virtue of the conducting optical fiber, the converged transmission signal is transmitted to the corresponding detector to be detected by corresponding detector; or the light signal entering the optical probe is scattered through the to-be-detected solution by 90 degrees and is converged and enters the conducting optical fiber, and by virtue of the conducting optical fiber, the converged 90-degree ...

Device for rapidly and nondestructively detecting component content of yellow rice wine

The invention relates to a device for rapidly and nondestructively detecting the component content of yellow rice wine. The existing detection method has the disadvantages of large time consumption, complication in operation and damage to a sample. In the device provided by the invention, after the light emitted by a light source is collimated through a lens, a modulating disk is aligned to the collimated parallel light, thereby carrying out the light intensity modulation; the collimated parallel light is split by a spectrometer which comprises an interference filter, a filter wheel and a stepper motor; the monochromatic light with the bandwidth of 10-20nm is emitted into an immersion optical fiber probe and then emitted to a detector; after the weak photoelectric signals output by the detector are amplified by an instrument amplifier and processed through a low pass filter, and the weak photoelectric signals are converted into digital signals by a converter; and the digital signals are ...

人体神经阈值的检测系统

... 本发明涉及一种用于绘制神经阈值图谱及在临床医学中进行应用的人体神经阈值的检测系统，它由神经阈值刺激仪、数字式肌电图机和后续制图数据处理计算机组成，神经阈值刺激仪向脑神经纤维束输出刺激电信号，数字式肌电图机的电极设置在该脑神经支配的人体对应运动肌上，检测该肌肉受神经支配所产生的肌电信号，并反馈到神经阈值刺激仪，以使神经阈值刺激仪记录下此刻所输出的刺激电信号的相关参数，最后送入制图数据处理计算机绘出人脑神经阈值图谱。本发明系统的建立将为诊断治疗神经功能障碍性疾病开辟一条新路，更为其功能恢复性治疗提供定量标准。 ...

Dual-purpose vacuum suction apparatus

The invention relates to a dual-use negative pressure suction device, which comprises a bottom plate (1), a bracket (2), a negative pressure generator (3) and a liquid storage tank (4), and is characterized in that a shell (301) of the negative pressure generator (3) is movably arranged on the bracket (2) through a hinge shaft (5) at the upper end of the bracket (2), the lower part of the bracket (2) is hinged with a connecting rod (6), the upper end of the connecting rod (6) is provided with a pedal (7) and hinged with a pull rod (8), one end of the pull rod (8) is movably connected with one end of a piston rod (306) of the negative pressure generator (3), the piston rod (306) is also provided with an L-shaped pull rod (308), the horizontal section of the L-shaped pull rod (308) is inserted in a guide groove (311) on the shell (301) and is connected with the upper end of a force application handle (309), the lower end of the force application handle (309) is hinged with a cantilever end ...

Solenoid valve

The invention discloses an electromagnetic valve which comprises a driving structure and a valve body structure. The driving structure comprises a movement assembly, a reset assembly, a power assembly and a shell, the periphery of the movement assembly is sleeved with the shell, the power assembly is arranged between the shell and the movement assembly, the reset assembly is connected with the movement assembly, and the valve seat is connected with the shell. The moving assembly comprises a connecting piece, a rotating piece fixedly connected to the periphery of the connecting piece and a sleeving piece arranged on the periphery of the connecting piece in a sleeving mode, and one end of the connecting piece is connected with the valve element. The other end of the connecting piece is connected with a limiting piece, and a limiting matching piece corresponding to the limiting piece is arranged on the sleeving piece; the reset assembly is an elastic piece, one end of the elastic piece is ...

Fixing device of data memory and data memory module

Disposable simple targeting pneumatic atomizing administration device preloaded first-aid liquid medicine

The invention relates to a disposable simple targeting pneumatic atomizing administration device preloaded first-aid liquid medicine. The disposable simple targeting pneumatic atomizing administration device is characterized by comprising a liquid medicine box (1), an atomizing box (2) and a sucking device (3), wherein a guide sleeve (5) is arranged in the liquid medicine box (1) and is inserted into a diversion cover (7) in the atomizing box (2); a gap (8) in which the liquid medicine flows is formed between the guide sleeve (5) and the diversion cover (7); a spray pipe (6) is screwed in the guide sleeve (5); a push key (14) is arranged on the liquid medicine box (1); the air inlet end of the spray pipe (6) is connected with an air inlet guide pipe (4); an air spraying hole (9) is formed at the air outlet end of the spray pipe (6) and is opposite to the inlet end of a diversion hole (10) on the diversion cover (7); the outlet end of the diversion hole (10) is opposite to a baffle plate ...

Method and system for testing human nerve threshold value

A method for measuring the threshold value of human nerve includes opening human skull, applying electric stimualting signal to the nerve to be measured, measuring the electromyographic signal of themuscle controlled by said nerve, and finding out the threshold value and relative parameters. Its system is composed of a nerve threshold stimulator, a digital electromyograph and a computer.

Method for separating and extracting fetal electrocardiogram by adopting multi-lead signal fusion mode

The invention discloses a method for separating and extracting a fetal electrocardiogram by adopting a multi-lead signal fusion mode, which comprises the following steps of: (1) reading synchronously acquired one path of abdomen lead electrical signals of a pregnant woman and multiple paths of limb lead or chest lead electrical signals serving as reference signals; (2) forming a phase space based on the read abdomen lead signals and the reference signals, and sequentially connecting state points in the phase space according to a time sequence to form an evolution orbit with certain periodical property; (3) for each state point in the phase space, finding periodical association points closest to the state point on different orbits; (4) establishing a linear or nonlinear regression model between the abdomen lead signals and the reference signals in sample points by using the periodical association points of each state point as the sample points to realize regression estimation of maternal ...

Optical distance adjustable liquid printing opacity characteristic measuring device

The utility model provides an optical distance adjustable liquid printing opacity characteristic measuring device, includes base, optical distance regulation platform, take collimating lens's incident optic fibre, take collimating lens's outgoing optic fibre, light source and detector, the one end of incident optic fibre is connected with the light source, and its other end is provided on the optic fibre upper mounting plate by collimating lens is relative with the outgoing optic fibre, the one end of outgoing optic fibre is provided under the optic fibre on the platform by collimating lens is relative with the incident optic fibre, and its other end is connected with the detector, be provided with the sealed safeguard glass's in area last optic fibre light -emitting window on the optic fibre upper mounting plate, the light mouth is gone into to the lower optic fibre that is provided with the sealed protection glass in area under the optic fibre on the platform, go up the optic fibre light ...

Near infrared spectrum qualitative analysis method with universality

The invention discloses a near infrared spectrum qualitative analysis method with universality. The method comprises the following steps: acquiring an infrared spectrum of each of a training set sample and a prediction set sample, constructing a cosine dictionary, solving expression coefficients of the training set sample and the prediction set sample in the cosine dictionary, carrying out the spectrum reconstruction in combination with sparseness of the expression coefficients, searching qualitatively classified effective projection direction according to reconstructed training set near infrared spectrum and training set sample classifying number, and finishing the projection transformation of the reconstructed training set infrared spectrum and the reconstructed prediction set near infrared spectrum, and then computing the Laplacian matrix of the transformed training set infrared spectrum and the transformed prediction near infrared spectrum, and transforming the classification problem ...

Supported catalyst for preparing hexa-olefin by dimerization of propylene and preparation method of supported catalyst

The invention discloses a supported catalyst for preparing hexa-olefin by dimerization of propylene and a preparation method of the supported catalyst, and belongs to the technical field of catalysts. The catalyst is prepared from a (beta-ketimine) nickel complex, an organic-aluminum compound, and an inert inorganic compound carrier. The supported catalyst for preparing the hexa-olefin by the dimerization of the propylene is easy to prepare and high in stability; the propylene dimerization conditions are mild; the dimerization can be realized at room temperature and low propylene pressure; the supported catalyst has high activity and high selectivity on the dimerization of the propylene, and is easily separated from a liquid phase product; according to the propylene dimerization performed by utilizing the supported catalyst disclosed by the invention, the catalytic activity can reach 30,000 to 80,000 mol C3<=>/molNi*h; the selectivity of the hexa-olefin obtained by the dimerization is 70 ...

Medical refrigerated transport case

The invention relates to a medical refrigerated transport case which comprises a case body (1) and a case cover (2), one side of which is connected in an articulated way and the other side of which is movably connected through a connecting clip. The medical refrigerated transport case is characterized in that the case body (1) comprises a casing (3), a heat insulating layer (4) and an inner case (5); wherein the heat insulating layer (4) is positioned between the casing (3) and the inner case (5), the inner case (5) is provided with a specimen storage space (6), the case wall of the inner case (5) is filled with phase change refrigerating agent (7), at least a semiconductive refrigerating piece (8) is attached on the outer case wall of the inner case (5), a radiator fan (9) is installed in the position corresponding to the semiconductive refrigerating piece (8), and a louvre is formed or a radiating door is installed on the casing in the position corresponding to the radiator fan (9); a ...

Liquid light transmitting property measurement device with adjustable optical path

The invention provides a liquid light transmitting property measurement device with an adjustable optical path. The liquid light transmitting property measurement device comprises a base, an optical path adjusting platform, an incidence optical fiber with a collimating lens, an outgoing optical fiber with a collimating lens, a light source and a detector, wherein one end of the incidence optical fiber is connected with a light source, and the other end of the incidence optical fiber and the outgoing optical fiber are oppositely arranged on an optical fiber upper platform through the collimating lens; one end of the outgoing optical fiber and the incidence optical fiber are oppositely arranged on an optical fiber lower platform through the collimating lens, and the other end of the outgoing optical fiber is connected with the detector; the optical fiber upper platform is provided with an upper optical fiber light-emitting hole with sealed protection glass; the optical fiber lower platform ...

Supported catalyst for synthesizing 2, 3-dimethyl butene through propylene dimerization and preparation method of supported catalyst

The invention discloses a supported catalyst for synthesizing 2, 3-dimethyl butene through propylene dimerization and a preparation method of the supported catalyst and belongs to the technical field of catalysts. The catalyst is prepared from a bivalent nickel complex (salicylaldiminato), an organic aluminum compound, and an inert inorganic compound carrier. The supported catalyst is easy to prepare and good in stability; the condition of propylene dimerization is moderate and the dimerization reaction can be realized at a room temperature and a relatively low propylene pressure; the catalyst has high activity and relatively high selectivity to the propylene dimerization; by adding organic phosphine, dipolymer mainly containing 2, 3-dimethyl butene is obtained; the supported catalyst and liquid phase product are easy to separate.

Novel multifunctional trailer for field operations

The invention discloses a novel multifunctional trailer for field operations. The novel multifunctional trailer comprises a car body, universal wheels and a pull rod connected with the car body, wherein the universal wheels are arranged at the bottoms of support platforms; a space used for containing a strapping tape is formed by each support platform and the bottom of the car body; two table legs are arranged at one side of the bottom of the car body, and another two table legs are positioned at the other side of the bottom of the car body; the table legs are respectively connected with the edge of the car body by a bolt; the table legs can rotate around the corresponding bolts; support rods are connected with the middle parts of the table legs, and certain ends of the support rods can be stretched by rotating; the bottom of the car body is provided with limiting pieces; each limiting piece is externally provided with a first movable fixing part; each first movable fixing part and the ...