39results about How to "Low environmental sensitivity" patented technology

A low-k dielectric material with increased cohesive strength for use in electronic structures including interconnect and sensing structures is provided that includes atoms of Si, C, O, and H in which a fraction of the C atoms are bonded as Si—CH3 functional groups, and another fraction of the C atoms are bonded as Si—R—Si, wherein R is phenyl, —[CH2]n— where n is greater than or equal to 1, HC═CH, C≡CH2, C≡C or a [S]n linkage, where n is a defined above.

A two-DOF (degree of freedom) heterodyne grating interferometer displacement measurement system comprises a two-frequency laser, a grating interferometer, a measuring grating, a receiver, and an electronic signal processing part. The grating interferometer comprises a polarizing beam splitter, a reference grating and a refraction element. The measurement system measures displacement according to optical grating diffraction, optical Doppler Effect and optical beat frequency principle. A two-frequency laser beam emitted by the two-frequency laser enter the grating interferometer and the measuring grating before two light signals are output to the receiver, and the signals are sent to the electronic signal processing part. When the grating interferometer is in two-DOF linear relative motion with the measuring grating, the system can output two linear displacements. The measurement system allows for sub-nano or higher resolution and precision, and can measure two linear displacements simultaneously. The measurement system has the advantages of insensitivity to environment, high measurement precision, small size, light weight and the like, and after the measurement system is used as a lithography machine ultra-precision workpiece bench position measurement system, comprehensive performances of a workpiece bench can be improved.

A cable retention structure defining a castellated fiber cable clamping surface. The castellated surface has a series of alternating small and large cavities distributed along the axial direction. The small cavities are sized such that when the castellated surface is pressed against the buffer jacket exterior of the fiber cable, the small cavities will be able to clamp the fiber cable jacket within its full dimensional tolerance range. The large cavities are sized to provide sufficient clearance to accommodate the relatively soft material of the cable jacket which cannot be accommodated by the small cavities. The cable jacket is securely held by the retention structure to prevent slipping. Accordingly, fiber cables having buffer jackets with large dimensional variations can still be securely retained by the castellated retention structure in accordance with the present invention.

The invention discloses a coaxial three-layer high-activity bio-enzyme-embedded electrostatic spinning nano-fiber membrane and a preparation method thereof. The coaxial three-way electrostatic spinning technology is used to allow bio-enzyme to be embedded into the sandwich layer of slow release activating agent and porous polymer so as to form the porous nano-fiber membrane. The nano-fiber membrane of a sandwich structure sequentially comprises a slow release activating agent layer (1), an immobilized bio-enzyme layer (2) and a porous polymer layer (3) from inside to outside. By building the structure with communicating ducts, immobilization amount of enzyme is increased, sufficient contact of the enzyme and a substrate is promoted, mass transfer resistance between the enzyme and the substrate is lowered, catalytic efficiency and reusability of the enzyme are increased effectively, environmental sensitivity of the bio-enzyme is lowered, and lasting stability of the bio-enzyme when being applied in complex environments is increased.

The invention provides a profile adjusting and water plugging agent and application, a profile adjusting and water plugging system and preparation method and an application thereof, and relates to thetechnical field of oilfield development. The profile adjusting and water plugging agent comprises, by weight, the following raw materials: 5-30 parts of inorganic nano-particles, 2-10 parts of amphiphilic polymer, 2-10 parts of activator and 1-10 parts of cross-linking agent; the profile adjusting and water plugging system comprises profile adjusting and water plugging agent and water; the technical problem of limited application range of the existing polyacrylamide gel water plugging system under the condition of high temperature and high salt is relieved, so that the long-term stability andthe plugging strength of the generated water plugging gel are obviously improved, and the environmental sensitivity is obviously reduced, so that the system has a wide application prospect in the development of high-temperature and high-salt oil reservoirs.

The invention discloses a wet multi-disc parking brake which comprises a brake cover, a brake shell, a piston, a friction pair, a spring, a spline shaft, a sealing element and a retainer ring. The piston is mounted in a piston cylinder encircled by the brake cover and the brake shell, the piston cylinder comprises a first cylinder hole with a large diameter and a second cylinder hole with a small diameter, the piston is provided with a first sliding surface with a large diameter and a second sliding surface with a small diameter, the first sliding surface is in slide fit with the wall of the first cylinder hole, the second sliding surface is in slide fit with the wall of the second cylinder hole, the spring on the brake cover is butted to the back of the piston, the friction pair comprises friction discs and dual discs, is arranged on the outer periphery of the spline shaft and is positioned on a side of the front surface of the piston, the friction discs and the dual discs are axially alternately arranged, the brake shell is meshed with the friction discs via internal spline, the dual discs are meshed with the spline shaft via internal splines, and a high-pressure oil circuit and a lubricating oil circuit are arranged in a tank. The wet multi-disc parking brake has the advantages that the wet multi-disc parking brake is small in radial size, and dry friction among the friction discs and the dual discs can be prevented.

A two-dimension self-calibration gauge point detection alignment system comprises a zero signal reader, a two-dimension workbench, a grating ruler auxiliary calibration plate, a reading head detection part and a measuring reference frame. The grating ruler auxiliary calibration plate comprises grating rulers with zero gauge points in the X direction and in the Y direction. The reading head detection part comprises a grating ruler reading head and a mounting support. The alignment system achieves gauge point alignment based on a grating ruler detection alignment principle and a zero signal detection principle. The reading head detects zero gauge point signals on the grating ruler auxiliary calibration plate to transmit the signals to the zero signal reader, meanwhile, the two-dimension workbench records the position coordinates of the two-dimension workbench and transmits the signals to the zero signal reader, and the position coordinates of the zero gauge points are obtained. The two-dimension self-calibration gauge point detection alignment system can be applied to the two-dimension self-calibration technology, and nanoscale resolution and alignment precision are achieved. Signal reading time delay is small, and the two-dimension self-calibration gauge point detection alignment system can be applied to workbench dynamic and high-speed calibration. The entire structure is relatively simple, the performance is high, and the two-dimension self-calibration gauge point detection alignment system is not sensitive to environments.

A compliant structure clamps the alignment pins to accurately and precisely locate the alignment pins. The compliant structure supports the alignment pins with no clearance. The compliant structure is defined by at least a flexure in the form of a cantilevered structure extending at a side of the ferrule. The cantilevered structure, with or without a complementary support structure, defines a space in which an alignment pin can be supported. The flexure may be defined by one or more slots provided on the body of the ferrule to facilitate bending of the extended cantilevered structure. In another embodiment, the ferrule comprises a ferrule insert having grooves for supporting optical fibers, and a ferrule frame that supports the ferrule insert and alignment pins. The compliant structure is provided on the frame. In a further embodiment, the ferrule insert is provided with optical fiber grooves at its perimeter.

A cable retention structure defining a castellated fiber cable clamping surface. The castellated surface has a series of alternating small and large cavities distributed along the axial direction. The small cavities are sized such that when the castellated surface is pressed against the buffer jacket exterior of the fiber cable, the small cavities will be able to clamp the fiber cable jacket within its full dimensional tolerance range. The large cavities are sized to provide sufficient clearance to accommodate the relatively soft material of the cable jacket which cannot be accommodated by the small cavities. The cable jacket is securely held by the retention structure to prevent slipping. Accordingly, fiber cables having buffer jackets with large dimensional variations can still be securely retained by the castellated retention structure in accordance with the present invention.

A method for connecting joints of thermoplastic composite materials, which includes pretreating the joint parts of thermoplastic composite materials; fixing the thermoplastic composite materials on a fixture in a way that the joint parts are opposite or overlapping; clamping carbon fiber unidirectional tapes or fabrics on the thermoplastic composite materials Between the joints, leave some carbon fiber unidirectional tape or fabric outside the joints, apply conductive glue and clamp it on the conductive clip of the heating equipment, turn on the DC power supply of the heating equipment, until the joints are welded together to form a joint ; Steps such as trimming the shape of the joint. Effects of the present invention: the joint structure made has less influence on the in-plane performance of thermoplastic composite materials, lowers environmental sensitivity, less weight gain to the structure, less change in shape, and can improve the bonding effect between joints of thermoplastic composite materials , so that the mechanical properties and reliability of the thermoplastic composite joint structure can be improved, and the practical risk of the thermoplastic composite joint structure can be reduced.

An expanded beam ferrule includes a first ferrule halve having first reflective surfaces and a second ferrule halve having second reflective surfaces, which together retain optical fibers. The pair of reflective surfaces output collimated light parallel to the mid-plane of the ferrule. An external sleeve aligns the external surface of two similar ferrules, with corresponding second reflective surfaces of the ferrules facing each other. Output light from an optical fiber held in one ferrule is bent twice by the pair of reflective surfaces, with beam divergence after the first bent, and collimation after the second bent. The collimated light is transmitted to the facing second reflective surface in a facing second ferrule aligned by the sleeve, which is subject to optical reshaping in reverse to that undertaken in the first ferrule, so as to converge and focus light to input to the optical fiber held in the other ferrule.

The invention discloses an ultra-precise displacement measuring system based on an optical neural network. The system comprises a light source, an optical displacement measuring device, an optical neural network, a detector array and a signal processing device. When a target object moves, the system takes a measurement optical signal output by the optical displacement measuring device as a signalinput, the signal is received by the detector array after being processed by the optical neural network, and finally the signal is converted into displacement information of the target object throughthe signal processing device. The invention further discloses an ultra-precise displacement measuring method based on the optical neural network. The optical neural network is used for processing themeasurement optical signal, so that the displacement of the target object can be directly measured; the phase discrimination process of the electronic signal is not needed; the response speed is extremely high; the size can be zoomed; the energy utilization rate is high; and the system is suitable for ultra-precise measurement occasions with high speed and high dynamic performance requirements. According to the system, the multi-degree-of-freedom pose measurement of the target object also can be realized by increasing the number of input measurement optical signals and the number of detector arrays.

The invention relates to a nickel-based alloy with high grain-boundary strength and a preparation method thereof. The nickel-based alloy consists of the chemical components in percentage by weight; 20-25 percent of chromium, 0.2-0.7 percent of copper, 0.01-0.2 percent of carbon, 8.0-10.0 percent of molybdenum, 10-15 percent of cobalt, 0.5-1.5 percent of aluminum, 0.2-0.6 percent of titanium, 0.01-0.02 percent of boron, 0.01-0.03 percent of tungsten, 0.01-0.3 percent of tantalum, 0.02-0.06 percent of rare earth and the balance of nickel and other unavoidable trace impurity elements. The preparation method for the nickel-based alloy with high grain-boundary strength comprises the following steps of (1) preparing raw materials: preparing a proper amount of Incone1617 main material and a small amount of Re, B, Ta and W for component adjustment; and (2) feeding the materials for smelting: putting the materials Cr, Mo, Ta and W which have high smelting points to the bottom of a crucible, then adding the Incone1617 furnace material, sequentially adding the rest of the raw materials, covering the materials with a slag removal agent, and smelting the materials in a vacuum smelting furnace. By the adding of B, Ta and the rare earth elements, the nickel-based alloy is low in environment sensitivity and can achieve effects of purifying the grain boundary and effectively improving the grain-boundary bonding strength.

An expanded beam ferrule includes a first ferrule halve having reflective surfaces and a second ferrule halve, which together retain optical fibers. The reflective surfaces output light perpendicular to the mid-plane of the ferrule. A sleeve aligns the external surface of two similar ferrules, with the reflective surfaces of the respective ferrules facing each other. Output light from an optical fiber held in the first ferrule is bent and collimated by a reflective surface, transmitted to the facing reflective surface in a second ferrule aligned by the sleeve, which bends the light to input to the optical fiber held in the second ferrule. The ferrule components and / or sleeve are precision formed by high throughput metal stamping. The ferrule is incorporated in an optical fiber connector.

The invention belongs to the medical technical field, and particularly provides a pharmaceutical composition containing olanzapine. A preparing way is a direct tabletting process method, and auxiliary materials suitable for olanzapine stability and compatibility are selected through testing; olanzapine tablets obtained through the process preparing way have good quality stability and have the content uniformity and other oral preparation related quality items all according with requirements. The process has the advantages of good reproducibility, strong operability, low process cost, relatively good clinical use value and relatively good social benefits. The oral preparation provided by the invention is used for treating schizophrenia.

A ferrule for an optical fiber connector has an external surface for alignment with a complementary surface of an alignment sleeve (i.e., the inside surface of a generally cylindrical or tubular sleeve). The external surface of the ferrule is generally cylindrical, having a sectional contact surface profile that is generally oval in shape. More specifically, a plurality of points of contact between the ferrule and the sleeve are defined along a curve in cross-section, wherein the center of curvature at each of the contact points along this contact point curve (i.e., the curve containing contact points that contribute to alignment) does not lie in the plane of the axis of the array of optical fibers.

A three-DOF (Degree of Freedom) heterodyne grating interferometer displacement measurement system comprises a dual-frequency laser, a grating interferometer, a measurement grating, receivers and an electronic signal processing component; the grating interferometer comprises a polarizing beam splitter, a reference grating and dioptric elements; the measurement system realizes displacement measurement on the basis of grating diffraction, the optical Doppler Effect and the optical beat frequency principle. Three linear displacements can be output by the system when the grating interferometer and the measurement grating perform a three-DOF linear relative motion. The measurement system can reach sub-nanometer and higher resolution and precision, and can simultaneously measure three linear displacements. The measurement system has the advantages of being environmentally insensitive, high in measurement precision, small in size, light in weight, and is capable of improving the overall performances of an ultra-precision stage of a lithography machine as a position measurement system for this stage.

A two-degree-of-freedom heterodyne grating interferometry measurement system, comprising: a single-frequency laser device for emitting a single-frequency laser, and the single-frequency laser can be split into a beam of reference light and a beam of measurement light; an interferometer mirror group and a measurement grating for forming a reference interference signal and a measurement interference signal from the reference light and the measurement light; and a receiving optical fiber for receiving the reference interference signal and the measurement interference signal, wherein a core diameter of the receiving optical fiber is smaller than a width of an interference fringe of the reference interference signal and the measurement interference signal, so that the receiving optical fiber receives a part of the reference interference signal and the measurement interference signal. The measurement system has advantages of insensitivity to grating rotation angle error, small volume, light weight, and a facilitating arrangement.

The invention provides a metal-based powder metallurgy brake pad for a high-speed train and a manufacturing method thereof. The brake pad is made of the following raw materials: matrix components: 30-60% by weight of copper powder and 20-40% by weight of ferrous powder; lubrication components: 8-20% by weight of graphite powder and 1-5% by weight of molybdenum disulfide; friction components: 1-3% by weight of tungsten, 1-3% by weight of corundum, 1-3% by weight of silica sand and 1-3% by weight of boron carbide; friction stable components: 1-4% by weight of 80-400-mesh carbon fiber powder; and a binding material: resin occupying 1-5% of the sum of the weight of the components. The invention further comprises a manufacturing method of the metal-based powder metallurgy brake pad for the high-speed train. A friction system formed by the brake pad and machine wheels is high and stable in friction coefficient, friction coefficient fluctuation is small during braking, and reliability is high.

A three-DOF (Degree of Freedom) heterodyne grating interferometer displacement measurement system comprises a dual-frequency laser, a grating interferometer, a measurement grating, receivers and an electronic signal processing component; the grating interferometer comprises a polarizing spectroscope, a reference grating and dioptric elements; the measurement system realizes displacement measurement on the basis of grating diffraction, the optical Doppler Effect and the optical beat frequency principle. Three linear displacements can be output by the system when the grating interferometer and the measurement grating perform a three-DOF linear relative motion. The measurement system can reach sub-nanometer and even higher resolution and precision, and can simultaneously measure three linear displacements. The measurement system has the advantages of being environmentally insensitive, high in measurement precision, small in size, light in weight, etc., and is capable of improving the overall performances of an ultra-precision stage of a lithography machine as a position measurement system for this stage.

A method for the detection of hydrocarbon contamination in a sample is disclosed. The method includes contacting a sample with a molecular probe. The molecular probe has a photoluminescence which is environmentally sensitive. The photoluminescence from the molecular probe is collected. The method includes determining whether the photoluminescence is indicative of a hydrocarbon contaminated sample. A test strip for the detection of hydrocarbon contamination in a sample is also disclosed. The test strip includes a molecular probe embedded in a substrate and / or immobilized to the substrate, the molecular probe having a photoluminescence which is environmentally sensitive to hydrocarbon contaminated sample.

The invention discloses a coaxial three-layer high-activity bio-enzyme-embedded electrostatic spinning nano-fiber membrane and a preparation method thereof. The coaxial three-way electrostatic spinning technology is used to allow bio-enzyme to be embedded into the sandwich layer of slow release activating agent and porous polymer so as to form the porous nano-fiber membrane. The nano-fiber membrane of a sandwich structure sequentially comprises a slow release activating agent layer (1), an immobilized bio-enzyme layer (2) and a porous polymer layer (3) from inside to outside. By building the structure with communicating ducts, immobilization amount of enzyme is increased, sufficient contact of the enzyme and a substrate is promoted, mass transfer resistance between the enzyme and the substrate is lowered, catalytic efficiency and reusability of the enzyme are increased effectively, environmental sensitivity of the bio-enzyme is lowered, and lasting stability of the bio-enzyme when being applied in complex environments is increased.

The invention discloses a wear mitigation method of a linear ultrasonic motor, which belongs to the technical field of ultrasonic motors. In the wear mitigation method of the linear ultrasonic motor, the surface modified technology is used for the linear ultrasonic motor, and a pit-type surface micro-structure is prepared on the friction end face of a stator or a rotator, therefore, wear due to three-body friction is reduced, and the output force, the output power and the service life of the motor are effectively improved. The three-body friction is further reduced by optimizing structural parameters of the pit-type surface micro-structure, and the environmental sensitivity of surface friction is reduced by covering a wear resisting layer on the friction end face of the stator and / or the stator. The invention also discloses the linear ultrasonic motor, and the pit-type surface micro-structure is prepared on the friction end face of the stator or the stator.

The invention discloses a photo-thermal power generation system comprising a diagrid industrial structure. The system comprises a photo-thermal tower, a steam generator, a steam turbine, a hot fused salt tank, a cold fused salt tank, a connecting pipeline and the like. A fused salt heat absorber is supported at the top of the photo-thermal tower, is connected with cold and hot fused salt pipelines in a structure and is connected with the cold fused salt tank, the hot fused salt tank and the steam generator outside the structure, power generation is conducted through acting of the steam turbine, and the photo-thermal tower is provided with an air inlet and outlet layer which is connected with a surface radiator inside the structure, a heat return system outside the structure, a circulating water pump and the like to form a surface type indirect air cooling system. In conclusion, a high-efficiency photo-thermal power generation system is formed, the system has photo-thermal power generation and heat dissipation and indirect cooling functions, the problems that a traditional direct cooling system is large in power consumption, and an indirect cooling system is large in occupied area, long in construction period, high in initial investment and the like are solved, environmental protection performance and corrosion resistance of a project are improved, and anti-wind and anti-seismic safety performance is excellent.

The invention relates to a nickel-based alloy with high grain-boundary strength and a preparation method thereof. The nickel-based alloy consists of the chemical components in percentage by weight; 20-25 percent of chromium, 0.2-0.7 percent of copper, 0.01-0.2 percent of carbon, 8.0-10.0 percent of molybdenum, 10-15 percent of cobalt, 0.5-1.5 percent of aluminum, 0.2-0.6 percent of titanium, 0.01-0.02 percent of boron, 0.01-0.03 percent of tungsten, 0.01-0.3 percent of tantalum, 0.02-0.06 percent of rare earth and the balance of nickel and other unavoidable trace impurity elements. The preparation method for the nickel-based alloy with high grain-boundary strength comprises the following steps of (1) preparing raw materials: preparing a proper amount of Incone1617 main material and a small amount of Re, B, Ta and W for component adjustment; and (2) feeding the materials for smelting: putting the materials Cr, Mo, Ta and W which have high smelting points to the bottom of a crucible, then adding the Incone1617 furnace material, sequentially adding the rest of the raw materials, covering the materials with a slag removal agent, and smelting the materials in a vacuum smelting furnace. By the adding of B, Ta and the rare earth elements, the nickel-based alloy is low in environment sensitivity and can achieve effects of purifying the grain boundary and effectively improving the grain-boundary bonding strength.

The invention discloses a multifunctional giant frame inclined grid industrial structure. The structure comprises a giant frame column, an inclined grid, an upper truss beam, a lower truss beam, a combined bottom plate, a combined top plate and a surface skin. A fused salt heat absorber is supported at the top of the structure and is connected to a fused salt pipeline, a cold fused salt tank, a hot fused salt tank and a steam generator in the structure to jointly form a heat absorption system; and the structure is provided with an air inlet and outlet layer, and the air inlet and outlet layer is connected to a surface radiator inside the structure, a regenerative system outside the structure, a circulating water pump and the like to jointly form a surface type indirect air cooling system. According to the multifunctional giant frame inclined grid industrial structure, a multifunctional industrial structure scheme is achieved; the problems that a traditional direct cooling system is large in power consumption, an indirect cooling system is large in occupied area, long in construction period, high in initial investment and the like are solved; meanwhile, the structure is large in overall rigidity and good in stability performance, and the limit value of tower top sunlight gathering on structure displacement is easily met. The multifunctional giant frame inclined grid industrial structure can be widely applied to tower-type photo-thermal power generation areas with different wind loads and seismic intensities.