105 results about "Mass loading" patented technology

A process for producing a supercapacitor electrode, comprising: (a) preparing a graphene dispersion containing an optional blowing agent; (b) depositing the dispersion onto a supporting substrate to form a wet layer; (c) removing the liquid medium from the wet layer to form a dried layer of graphene material; (d) heat treating the dried layer at a temperature from 80° C. to 3,200° C. to induce volatile gas molecules from the non-carbon elements or to activate the blowing agent for producing a layer of solid graphene foam having a physical density from 0.01 to 1.7 g/cm³ and a specific surface area from 50 to 3,300 m²/g; and (e) impregnating the foam with an electrolyte to form a layer of pre-impregnated graphene foam, which is compressed to form the electrode. This process leads to a supercapacitor having a large electrode thickness, high active mass loading, high tap density, and exceptional energy density.

Provided is a process for producing an alkali metal battery, comprising: (A) Preparing an anode material suspension and a cathode active material suspension; (B) Assembling a porous cell framework composed of a first conductive foam structure, a second conductive foam structure, and a porous separator disposed between said first and said second conductive foam structure; and (C) Injecting the anode suspension into pores of the first conductive foam structure to form an anode and injecting cathode suspension into pores of the second conductive foam structure to form a cathode, wherein the anode active material has a material mass loading no less than 20 mg/cm² or the cathode active material has a material mass loading no less than 15 mg/cm² for an organic or polymer material or no less than 40 mg/cm² for an inorganic material. The resulting batteries exhibit exceptional gravimetric and volumetric energy densities and long cycle life.

A merchandise display hook has a time delay mechanism for increasing the amount of time required to dispense items of merchandise from a display arm, while permitting bulk loading of the items of merchandise onto the display arm. The time delay mechanism includes a housing, a helix extending from the housing in a rearward direction, and a rotatable handle extending from the housing in a forward direction. Rotation of the handle causes the helix to rotate about the display arm to thereby dispense the items of merchandise from the display arm in the forward direction. The time delay mechanism further includes a lock mechanism having a secured position for attaching the time delay mechanism to the display arm and an unsecured position for allowing the time delay mechanism to be detached from the display arm to permit bulk loading. A first drive gear may be affixed to the handle that engages a reducing gear that in turn engages a second drive gear affixed to the helix so that the second drive gear turns the helix slower than the handle turns the first drive gear.

A sensor, method and system, for measuring certain characteristics of a fluid. The sensor utilizes a piezoelectric device having at least two tightly coupled resonators providing a two pole electric transfer function responsive to an electrical signal coupled to the input resonator. The piezoelectric sensor has a textured entrapment layer, constructed to entrap a known volume of fluid and impart motion to the entrapped fluid as well as to surrounding non-trapped fluid. The common mode frequency shift of the two resonant frequencies is related to mass loading due to the entrapped fluid, while the energy absorbed by the fluid, or a phase shift of one of the resonant frequencies, is related to the viscosity/density product of the fluid. Extracting the viscosity is a matter of mathematical manipulation. By controlling the energy level of the input electrical signal, the viscosity measurement may be conducted at a predetermined shear rate.

The present invention discloses a physical/biochemical sensor using a multisized piezoelectric microcantilever resonator array which enables to quantitatively and simultaneously analyze a mass loading effect and a surface stress change effect and a manufacturing method thereof. In the physical/biochemical sensor using the multisized piezoelectric microcantilever resonator array, a plurality of piezoelectric micro-cantilever resonators having different sizes is arrayed so as to quantitatively and discriminately analyze a surface stress change as well as a sensor surface mass change induced by an adsorbed sensing-target material occurring in a sensing process. Thus, the mass loading effect and the surface stress change effect can be quantitatively and simultaneously analyzed.

An object of the invention is to provide a coupling element of an MEMS filter with design flexibility and minimization of mass loading effects. The invention provides a structure wherein the mass loading effects are not reflected on the MEMS filter characteristic by using a nanosize coupling element with a very small mass compared to a microsize MEMS resonator, such as a carbon nanotube (CNT), as a coupling element part.

Provided is a process for producing an electrolyte-impregnated laminar graphene structure for use as a supercapacitor electrode. The process comprises (a) preparing a graphene dispersion having multiple isolated graphene sheets dispersed in an electrolyte; and (b) subjecting the graphene dispersion to a forced assembly procedure, forcing the multiple graphene sheets to assemble into an electrolyte-impregnated laminar graphene structure, wherein the multiple graphene sheets are alternately spaced by thin electrolyte layers, less than 5 nm in thickness, and the graphene sheets are substantially aligned along a desired direction, and wherein the laminar structure has a physical density from 0.5 to 1.7 g/cm³ and a specific surface area from 50 to 3,300 m²/g, when measured in a dried state of the laminar structure with the electrolyte removed. This process leads to a supercapacitor having a large electrode thickness, high active mass loading, high tap density, and exceptional energy density.

An implantable microphone for use with an implantable hearing instrument that has a reduced vibration sensitivity in comparison with its acoustic sensitivity. The microphone utilizes a plurality of small diaphragms as opposed to a single large diaphragm in order to reduce vibration sensitivity caused by mass loading of the diaphragms by overlying skin and tissue. The acoustic outputs of the plurality of small diaphragms are summed (e.g., acoustically or electronically), which allows the microphone to maintain adequate acoustic sensitivity for hearing augmentation purposes while having a reduced vibration sensitivity. In one aspect, the plurality of diaphragms is formed from a single membrane and a multi-apertured support structure in contact with the membrane. Each aperture in combination with the membrane defines a single diaphragm.

A system for isolating vibration and reducing acoustic noise in the RF coil of an MR imaging apparatus is presented. The system positions an RF conductor in its operative position proximate to an RF support form. The RF conductor is sandwiched between a vibration decoupling layer and a mass loading layer. The vibration decoupling layer is affixed to the RF support form so that the vibration decoupling layer is positioned between the RF conduit and the RF support form while the mass loading layer is located exterior of the RF conductor. By this arrangement, the acoustic energy is decoupled from the RF support form by the vibration decoupling layer while the vibration is reduced by the mass loading layer located exterior of the RF conductor.

The invention discloses an indoor three-dimensional grouting model test servo control system and a test method. The system comprises two parts of a three-dimensional grouting model test device and a constant-pressure grouting-water supply combined servo control device. The three-dimensional grouting model test device comprises three counterforce boards. A confining pressure counterforce cavity is placed between the first counterforce board and the second counterforce board. An axial pressure servo loading module for applying the axial loading force to the confining pressure counterforce cavity is placed between the second counterforce board and the third counterforce board. A pore water pressure loading module is arranged at the bottom of the confining pressure counterforce cavity. A grouted rock mass loading module and a confining pressure servo loading module applying confining pressure to the confining pressure counterforce cavity are arranged in the confining pressure counterforce cavity. The constant-pressure grouting-water supply combined servo control device comprises a constant-pressure double-liquid grouting pneumatic servo control module and a constant-pressure water supply pneumatic servo control module. The constant-pressure double-liquid grouting pneumatic servo control module is communicated with the confining pressure counterforce cavity. The constant-pressure water supply pneumatic servo control module is connected with the pore water pressure loading module.

Methods for sensing and building sensors provide for adding nanotubes to a sensor to improve characteristics such as the Q-factor associated with the sensor. Mass loading and damping characteristics of micromachined quartz crystal resonators on which a thin film of debundled single-walled carbon nanotube (SWNT) has been deposited are disclosed. An absolute mass sensitivity of ˜100 fg was experimentally measured by monitoring the continuous desorption of gases from SWNT surfaces in a vacuum ambient.

Carbon nanosheets fabricated by carbonization and activation or by carbonization alone. The nanosheets possess a disordered structure for copious reversible binding of ions at the carbon defects. They are also hierarchically micro-meso-macro porous, allowing facile ion transport at high rates both through the pore-filling electrolyte and in the solid-state. Also, a combined battery—supercapacitor energy storage device using the carbon nanosheets as one or both of the electrodes therein. Tuning the mass-loading ratio of the carbon nanosheets in the two electrodes configures the carbon nanosheets to operate either as a bulk insertion electrode (anode) or a surface adsorption electrode (cathode). The energy storage device may further include a housing with a form factor of a commercial battery.

The invention provides an experiment system for water and sand seepage of a fractured rock mass. The experiment system comprises a water and sand mixing device, a fractured rock mass experiment device, a rock mass loading component and a data acquisition device; the fractured rock mass experiment device comprises an inner cylinder, an outer cylinder and a base, the inner cylinder is arranged in the outer cylinder, and both the inner cylinder and the outer cylinder are arranged on the base; a groove is formed in the base, flow guide holes are uniformly formed in the lower end surface of the groove and are communicated with a seepage liquid conveying pipe; a water and sand injection hole of the water and sand mixing device is communicated with a water and sand through hole of the fractured rock mass experiment device; the rock mass loading component adopts an axial loading machine, a piston of the axial loading machine is arranged at the upper part of the inner cylinder of the fractured rock mass experiment device. The invention provides the experiment system for water and sand inrush of the fractured rock mass, which is simple in structure, reasonable in design, convenient to assemble and use and good in sealing performance and can really reflect the seepage amount of a water and sand mixture under the situation of the water and sand inrush of the fractured rock mass.

The invention relates to a method for recovering copper in copper-containing acid waste water of a mine. The method is characterized by an iron-carbon microelectrolysis method and comprises the following steps of: importing waste water into an iron carbon microelectrolysis pond of an iron carbon bed and staying for 0.5-5 hours, wherein the waste water addition takes the standard that added waste water covers the iron carbon of the iron carbon bed and does not overflow out of the iron carbon bed as a reference so as to ensure that the waste water has microelectrolysis and replacement reactions, deposited copper is reduced on a cathode carbon surface so as to achieve the purpose of recovering metal copper, and the mass loading ratio of iron to carbon in the iron carbon bed is 1:5. The method has the advantages of simplicity, good treatment effect, low expense, easy operation, and the like and can be used for recovering copper in the copper-containing acid waste water of a mine.

Provided is a supercapacitor comprising an anode, a cathode, an ion-permeable separator disposed between the anode and the cathode, and an electrolyte in ionic contact with the anode and the cathode, wherein at least one of the anode and the cathode contains multiple graphene sheets spaced by cellulosic nanofibers and has a specific surface area from 50 to 3,300 m²/g. Also provided is a process for producing an electrode for such a supercapacitor having a large electrode thickness, high active mass loading, high tap density, and exceptional energy density.

Provided is an alkali metal cell comprising: (a) a quasi-solid cathode containing 30% to 95% by volume of a cathode active material, about 5% to about 40% by volume of a first electrolyte containing an alkali salt dissolved in a solvent and an ion-conducting polymer dissolved, dispersed in or impregnated by a solvent, and about 0.01% to about 30% by volume of a conductive additive wherein the conductive additive, containing conductive filaments, forms a 3D network of electron-conducting pathways such that the quasi-solid electrode has an electrical conductivity from about 10⁻⁶ S/cm to about 300 S/cm; (b) an anode; and (c) an ion-conducting membrane or porous separator disposed between the anode and the quasi-solid cathode; wherein the quasi-solid cathode has a thickness from 200 μm to 100 cm and a cathode active material having an active material mass loading greater than 10 mg/cm².

The invention provides a frame torsional fatigue test bench with a loading device, and belongs to a test bench for automobile part assemblies. The frame torsional fatigue test bench comprises a portal frame, two actuators, a torsion beam and the like, and is characterized in that a front simulated suspension, a rear simulated suspension, a subframe and a frame are installed according to the state of an actual automobile; the upper end of the loading device is installed on the subframe to load, the lower end of the loading device is connected to jacks and spiral springs, the spiral springs can generate bidirectional displacement deformation along with movements of the frame, and follow-up movements of the loading device and a connection part of the frame are ensured; and the jacks are connected with the loading device through a lever so as to transfer a load carrying force, and the torsion beam and the spiral springs are fixed. The frame torsional fatigue test bench can comprehensively evaluate the torsional reliability of a frame assembly, actual working conditions are simulated through the bench device, and a follow-up constraint problem between the frame and a finished automobile mass loading unit is solved by the simulated loading device, thereby enabling the conclusion of a frame torsional fatigue test to have more reference values. The frame torsional fatigue test bench is novel in structure and effectively solves a problem of difficult evaluation for a durability test in development of a heavy commercial vehicle frame assembly.

The invention discloses a vibration table substructure test method based on three-parameter control AMD, which belongs to the technical field of structure test and can be used in anti-seismic test ofmulti-story and high-rise building structures. On the basis of the existing hybrid experimental research, an AMD loading device (also called an active mass driver) is used as a means of applying an interface force between a numerical substructure and an experimental substructure, and the control precision of the AMD loading device is improved through a three-parameter control algorithm. Compared with the existing vibration table substructure test method, the test method disclosed by the invention has the advantages as follows: the test conditions can be easily met (no additional counterforce wall is needed); a vertical self-weight effect is provided while the problem of inertia mass loading is solved and the influence of the high-order vibration mode of an upper substructure is neglected (the mass of the AMD loading device can provide a weight); the test precision is high (the high-frequency performance of three-parameter control is excellent); the requirement on the stroke of an actuator is low (there is no need to track the displacement of the board of a seismic simulation vibration table).

The invention provides a micron-sized molecular sieve supported nano-iron material preparation method. The method comprises a step of molecular sieve support pretreatment and a step of preparation of a molecular sieve supported nano-iron material. An MCM-41 meso-porous molecular sieve is treated as a support, nano-iron particles are generated on the molecular sieve support in an in situ mode through a liquid phase reduction process, the nano-iron mass loading rate of the molecular sieve supported nano-iron material is 25-90%, and the prepared molecular sieve supported nano-iron material has a particle size range of 1.2-20mum and an aperture range of 1.5-4.5nm. The MCM-41 meso-porous molecular sieve is coupled with nano-iron to prepare the high-activity micron-sized supported nano-iron material. The method has the advantages of effective improvement of the stability of the nano-iron in air, increase of the dispersibility of the nano-iron in an aqueous medium, effective inhibition of the agglomeration effect of nano-iron particles, increase of the active sites of the nano-iron material, and increase of the surface activity of the nano-iron material, and allows the nano-iron material to be easy separated and recovered in the water treatment technology and the recovery rate to reach 100%.