43results about How to "Low cost application" patented technology

A parallel flow (minichannel or microchannel) evaporator includes a porous member inserted at the entrance of the evaporator channels which provides refrigerant expansion and pressure drop controls resulting in the elimination of refrigerant maldistribution and prevention of potential compressor flooding.

A trash bag for containing wet trash has an outer ply of fluid imperious material defining an outer front wall and an outer rear wall of the bag, and an inner ply of fluid pervious material defining an inner front wall and an inner rear wall of the bag. The inner and outer plies form a compartment between them which contains a highly fluid absorbent material. The material is capable of capturing any fluids that enter the compartment from the interior of the bag thereby minimizing fluid leakage from the bag in the event that the outer ply of the bag is breeched. The material in the compartment may be combined with or include any of a variety of additional substances designed to act on, react to or counter the effects of fluids absorbed by the material. A low-cost, consumer version of the trash bag eliminates the inner ply, and simply comprises an outer ply of fluid impervious material with an inner liner of fluid absorbent material such as cellulose fluff pulp in sheet form.

Certain embodiments are directed to devices, methods, and/or systems that use electrical machines. For example, certain embodiments are directed to an electrical machine comprising: at least one stator at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, wherein the at least one module is in spaced relation to the plurality of the magnets; and the at least one rotor being in a rotational relationship with the at least one stator, wherein the quantity and configuration of the at least one module in the electrical machine is determined based in part on one or more operating parameters; wherein the at least one module is capable of being independently controlled; and wherein the at least one module is capable of being reconfigured based at least in part on one or more of the following: at least one operating parameter during operation, at least one performance parameter during operation, or combinations thereof. Other embodiments are also disclosed.

A linear Fresnel reflection type mid-and-low temperature solar energy thermochemical utilization device comprises a linear Fresnel reflection condensing mirror array driven by a solar tracking device to real timely track the sun, and a thermal absorber matched with the condensing mirror array and independently arranged, wherein the thermal absorber is tubular, a selective absorption coating is coated on the surface of the outer wall, and a chemical reactant medium and a catalyst are filled in the tube; a solar energy light-focusing system formed by the Fresnel reflection condensing mirror array and the solar tracking device is adopted and is well matched with the hot grade of thermal chemical reaction of mid-and-low temperature fossil fuel, the structure is simple, the manufacturing and running cost is low and the wing resistance is good when the solar energy thermochemical utilization device is mounted close to the ground; with the chemical reactant medium and the catalyst in the thermal absorber, the solar energy thermochemical utilization device can serve as the thermochemical reaction place while absorbing the solar energy, so that the heat can be directly absorbed and utilized, and the system integration complexity and energy transfer loss can be effectively reduced; as the thermal absorber is independently arranged, the safety and the stability are higher during the heat absorption and reaction process.

The invention discloses a Ta2O5/TiO2/3D porous titanium material and a preparation method thereof, and relates to the technical field of preparation of composite metal porous materials. The preparation method comprises the following steps that 3D porous titanium is polished, the polished 3D porous titanium is put into a sodium citrate-based solution for anodic oxidation treatment, the 3D porous titanium subjected to anodic oxidation treatment is dipped into a tantalum coating solution, the impregnated 3D porous titanium is dried, and the dried 3D porous titanium is put into a muffle furnace for sintering.

A valve for injecting fuel, including a valve positioning element, an armature connected to the valve positioning element, a stop that limits a movement of the armature, and a damping element provided between the armature and the stop, the damping element being applied as a damping layer on at least one part of the armature and/or on at least one part of the stop.

The invention relates to a rock mass grouting diffusion range monitoring method and device, and the method comprises the steps: arranging measuring lines along the transverse and vertical symmetry axes of the center of a rock mass, numbering measuring points, and determining the positions of excitation points and vibration pickup points; arranging an acceleration sensor at the excitation point; connecting one end of a data connecting line with the acceleration sensor, connecting the other end of the data connecting line to a data acquisition instrument, connecting the data acquisition instrument with a terminal, and transmitting obtained real-time data to the terminal; arranging a force sensor provided with a hammer head and used for measuring the exciting force; carrying out a preset number of hammering tests at each excitation point position, and calculating the fractal box dimension of acceleration response according to the selected preset number of groups of data; and comparing the difference of the dimensions of the acceleration response fractal boxes among different measuring points, and monitoring the size and range of the rock mass crack by a hammering method, so as to determine the grouting diffusion range of the rock mass according to the size and range of the rock mass crack. The determination of slurry diffusion and the influence range thereof in the similar model experiment can be realized.

The invention relates to a cheap cholera-diagnosing micro-fluidic unit capable of realizing liquid flow driving based on interfacial characteristics, belonging to the field of analytical testing. A series of obstacles exist in preparation of a substrate for a cholera-diagnosing micro-fluidic chip from cheap and easily workable polydimethylsiloxane (PDMS). According to main points of a technical scheme in the invention, PDMS with an original surface is selected as a substrate; the pipelines of a chip are filled with a micronsized silica particle filler which is used for supporting the inner walls of the pipelines, compensating original hydrophobic pipelines with a set of hydrophilic micro-channels, and extruding and covering the inner wall surfaces of the pipelines so as to reduce the contact between biological macromolecules and the inner wall surfaces; and a minisized ultrasonic transducer is adhered onto the terminal of the chip, and rapid and progressive decrease of ultrasonic intensity is realized in a short distance in virtue of strong ultrasonic wave absorption capacity of PDMS, so interfacial tension difference is formed at two ends of the chip under such induction, and sample liquid flow is thus allowed to flow towards the terminal along the pipelines of the chip.

The invention belongs to the technical field of nonferrous metal processing, and discloses a method for preparing a titanium-based composite material by sintering pre-dispersed graphite composite titanium hydride and the prepared composite material. Specifically, titanium hydride powder and graphite powder are used as raw materials to form a TiC reinforced titanium-based composite material by powder metallurgy. The method comprises the following steps that firstly, the graphite powder is pre-dispersed by using polyvinylpyrrolidone; and then, the graphite powder is attached on the surface of titanium hydride for sintering formation, so that such problems as powder agglomeration and weak alloy performance caused by direct physical mixing of the titanium hydride and the graphite powder are solved. The tensile strength of the obtained TiC reinforced titanium-based composite material can be 535 MPa; the elongation after fracture can be 10%; the optimized wear volume is reduced by 15% compared with pure titanium; compared with a titanium-based composite material prepared by using titanium hydride as a raw material reported in the literature, the breakthrough in greatly improving the tensile plasticity is realized; and the method can be applied to the preparation of high-strength parts or wear-resistant structural parts in the fields of aerospace, armored cars, weapons, ships and automobiles.

The invention relates to an inexpensive acquired immunodeficiency syndrome diagnosis microfluidic apparatus with a specific fluid drive mode, and belongs to the field of analysis and testing. According to the present invention, the use of inexpensive and easily-processed polydimethylsiloxane (PDMS) to produce the substrate of a microfluidic chip for diagnosing acquired immunodeficiency syndrome isthe technical target; and the inexpensive acquired immunodeficiency syndrome diagnosis microfluidic apparatus is characterized in that the substrate selects the PDMS having an original ecological surface, the pipeline of the chip is filled with a micro-scale silica particle filler, the micro-scale silica particle filler is used for supporting the inner wall of the pipeline, compensating the original hydrophobic pipeline with the set of hydrophilic micro-flow channels, and extruding and covering the inner wall surface of the pipeline so as to reduce the opportunity of the contact between biological macromolecules and the inner wall surface, a miniature ultrasonic wave transducer is arranged close to the sample liquid flow terminal of the microfluidic chip in an attached manner, and the rapid reduction of the ultrasonic wave intensity within the short time is achieved through the strong absorption on the ultrasonic waves by the PDMS, such that the interface tension difference formed onboth ends of the chip is induced so as to promote the sample liquid flow to flow to the terminal direction along the pipeline of the chip.

The invention disclosed a method for forming shallow trenches of the dual active regions. Firstly, forming an etch stop layer on a semiconductor substrate; secondly, using a first accurate photomask to expose and develop the semiconductor substrate, until the etch stop layer has been exposed on the top of the first shallow trench regions and the second shallow trench regions; thirdly, etching the etch stop layer entirely in the exposed regions; fourthly, using a second photomask to expose and develop the first shallow trench regions which require a deeper etch depth of the trench than that of the second shallow trench regions; fifthly, etching and forming preliminary entirely depth in the first shallow trench regions, and then removing the second photomask; at last, taking the etch stop layer as a mask, and simultaneously etching the first shallow trench regions and the second shallow trench regions to form the first hallow trenches and the second shallow trenches having different depths. The invention has realized a low-cost photomask application and an optimization of the etching process by optimizing the photomask design.

The invention relates to a microfluidic chip device depending on interphase interface characteristics to achieve sample fluid transfer, which belongs to the field of analytical testing. In practice, certain problems exist in using cheap and extremely easy-to-process polydimethylsiloxane (PDMS) to produce a substrate of a microfluidic chip. The microfluidic chip device is characterized in that PDMS with the original surface is chosen by the substrate, ducts of a chip are filled up with micron-sized silicon dioxide particle filler, and the functions of the filler include supporting the internal walls of the ducts, using a set of hydrophilic microchannels to compensate original hydrophobic ducts and squeezing and covering the internal wall surfaces of the ducts in order to reduce the chance of contact between biomacromolecules and the internal wall surfaces; a miniature ultrasonic transducer is mounted on a terminal of the chip in an attaching manner, the strong ultrasonic absorption of the PDMS is utilized to rapidly decrease ultrasonic intensity within a short distance, thereby an interface tension difference is induced to be formed at both ends of the chip, and sample fluid is then promoted to flow in a direction toward the terminal along the ducts of the chip.

The present invention relates to a method for determining the compressive tensile force acting on a fuel cell stack due to at least one tensioning element. Thereby, the compressive tensile force is the overall tensile force compressing the fuel cell stack. This is determined according to the invention by means of acoustic measurements on vibratable sections of the tensioning elements. The subject matter of the invention also includes a data processing program for carrying out the method according to the invention along with the use of a smartphone for carrying out the method according to the invention.

This invention discloses a digital television exciter capable of outputting multiple channels simultaneously. The digital television exciter comprises a clock distribution circuit; the clock distribution circuit is connected with N clock circuits arranged in parallel connection through phase-lock loops; N is not less than 2; the clock circuits comprise reference clocks and data clocks; the reference clocks and the data clocks are arranged in parallel connection; each clock circuit is connected with a single channel processing device; the single channel processing device is connected with a signal synthesizing device and a signal post-processing device in sequence; and the clock distribution circuit, the single channel processing device and the signal post-processing device are all connected with a control system. The digital television exciter has a simple structure and a convenient usage, reduces the hardware cost of the exciter, ensures that the work efficiency of each channel can be set freely in the whole television frequency band to break the limit of the signal bandwidth and realize a true multiple-channel exciter, meets the signal transmitting requirements of the multiple channels, and achieves the multiple-channel and low-cost application of the digital television in the remote areas.