99results about How to "Reduce energy absorption" patented technology

A ring-laser system that includes a plurality of ring-laser gain elements and a spectral-beam-combining output stage configured to combine a plurality of beams coming from the gain elements into an output beam and that includes chromatic-dispersion compensation. In some embodiments, the output stage includes a plurality of highly reflective dielectric-coated focussing elements. In some embodiments, the output stage includes a plurality of high-efficiency dielectric-coated grating elements. In some embodiments, the output stage includes a mostly reflective but partially transmissive output mirror and a highly reflective beam-reversing mirror configured to reflect a majority of a backward-traveling signal beam such that it becomes forward traveling. In some embodiments, each gain element further includes a photonic-crystal-rod power amplifier. Some embodiments have an amplitude modulator configured to pulse the plurality of beams, and a timing controller configured to synchronize the pulses of the plurality of beams. Some embodiments further include a non-linear wavelength-conversion device.

A silica glass optical material for transmitting light with a wavelength of from 155 to 195 nm emitted from an excimer laser or an excimer lamp, which comprises silica glass optical material of ultrahigh purity, containing from 1 to 100 wtppm of OH groups, from 5x1016 to 5x1019 molecules/cm3 of H2, and from 10 to 10,000 wtppm of F, but substantially free from halogens other than F, and having a fluctuation in refractive index, DELTAn, of from 3x10-6 to 3x10-7.

An electrode catheter for intervention purposes, such as a cardiac pacemaker, neurostimulator, ICD electrode, or EP catheter that includes

• • an elongate electrode catheter body (21) having a distal end (24) and a proximal end (26),
  • at least one electrode pole (23) in the area of the distal end (24) of the electrode body (20), and
  • at least one supply line (22), which runs insulated in the electrode body (21) in the main direction (H) from the proximal end to the distal end, to the at least one electrode pole (23), to desensitize the electrode catheter to the radiation of an electromagnetic field of an interfering frequency having a specific wavelength (λ), the supply line (22) changing its run direction at least twice in such a way that it runs at least once opposite to the main direction (H), and the distance (L1, L2) between two direction changes (R) is shorter than half of the wavelength (λ/2) of the interfering frequency.

Systems and methods are provided for regulating the transfer of energy inductively between an implantable device and an external charging system, wherein the energy transfer rate is regulated by varying an operating frequency of an inductive energy transfer circuit of the implantable device responsive a temperature measured within the implantable device.

A seatbelt retractor has a spool. An energy absorption mechanism absorbs energy from the spool during seatbelt protraction. The energy absorption mechanism has at least a first portion for a relatively high rate of energy absorption and preferably a second portion for a relatively low rate of energy absorption. The seatbelt retractor has an outer sheath cast, molded, coated or otherwise bonded to and encircling a portion of the external surface of the first portion or the second portion which upon a sufficient exposure to rotational energy breaks the bond between the first portion or the second portion and the outer sheath.

The invention relates to a method for gathering carbon dioxide, in particular to a method for gathering carbon dioxide by using high-stability alkaline ionic liquid, wherein carbon dioxide gas is absorbed by taking alkalescent quaternary phosphonium type ion liquid as an absorbent; the absorption pressure is 0.0001-0.2MPa; the absorption temperature is 10-70 DEG C; the absorption time is 0.1-2h; the absorbed carbon dioxide can be desorbed easily; the desorption temperature is within 80-150DEG C; and the desorption time is within 0.1-3h. In the invention, the high-stability alkaline ionic liquid is applied to the chemical gathering of carbon dioxide so that a high-capacity, low-energy consumption and recyclable gathering method of carbon dioxide is realized and a potential method is provided for the industrial gathering of carbon dioxide.

The invention discloses a fault current-limiting control method and system for an MMC type flexible direct-current power grid, which belong to the field of power transmission and distribution of powersystems. By introducing a control variable of the modulation coefficient, the number of submodules actually inputted by a bridge arm unit of a converter is determined by the control signal outputtedby a pole controller and the modulation coefficient together, so that the bus voltage of the direct-current side outlet of the converter is positively correlated with the modulation coefficient. For aflexible direct-current power grid constructed by any type of modular multilevel converter, the number of submodules inputted by the bridge arm unit of the converter is obtained by multiplying the control signal outputted by the converter pole controller by the modulation coefficient. Under a fault condition, the modulation coefficient is reduced, the number of submodules inputted by the bridge arm unit is actively reduced by each converter, so that the DC voltage of the DC side outlet of the converter is reduced when a fault occurs, the fault current of the DC power grid is limited, the on-off capacity of the circuit breaker and the energy absorption of the parallel lightning arrester of the DC circuit breaker are reduced, and the cost is reduced.

The invention discloses a method for producing high-permeability sack kraft paper by utilizing bamboo pulp. The sack kraft paper is prepared by steps of thickening by a pulp vacuum thickener, high consistency refining, low-consistency disk refining, flow grit removal, pulp screening by a pressurized screen, net molding on a floating flow box, four-roller three-pressure-zone pressing, drying, coiling, recoiling and packing. The method specifically comprises the following steps: mixing bamboo chips and needle wood chips, pulping by adopting a sulfate process, washing and screening the obtained pulp, performing high-consistency pulping to maintain the fiber length, performing low-consistency pulping, adding auxiliary materials, screening the pulp by the pressurized screen, loading on a net, molding on the net, performing four-roller three-pressure-zone pressing, drying by a drying part, and treating by a tensile device, thereby obtaining the sack kraft paper. By utilizing the method disclosed by the invention, the tensile sack kraft paper with low cost, high physical strength and high permeability can be produced.

A vehicle bumper system includes a beam, and an energy absorber with top and bottom horizontal sections and a mid-horizontal section. The horizontal sections form top and bottom nose portions that are semi-rigid but initially collapsible with a parallelogram motion that shifts the top and bottom portions vertically up (or down) upon impact. Horizontal impact forces are converted in part to vertical forces during an initial stroke of a frontal impact, “catching” an impacted human being. Then during a further continuing impact stroke, the top and bottom horizontal sections provide a “throwing” action. End sections of the energy absorber extend around ends of a bumper beam, forming a collapsible corner that, during impact, initially absorbs energy at a low rate to “catch” a person, and then develops increasing lateral forces that “throw” the person during a continuing impact stroke.

The invention relates to a method for obviously improving carbon capture performance by utilizing multipoint synergistic effect. The method utilizes an alkalescent functionalized ion liquid containing a plurality of acting sites as an absorbent to absorb carbon dioxide gas, absorption pressure is 0.0001-0.2MPa, absorption temperature is 10 DEG C to 100 DEG C, and absorption time is 0.1 hour to 2 hours. Desorption temperature is between 80 DEG C and 150 DEG C, and desorption time is between 0.1 hour and 3 hours. The method has the advantages of being good in ion liquid stability, high in absorption capacity, easy in desorption and the like, thereby having large industrial application potentiality.

A Tuned Mass Damper (TMD) for reducing vibration and noise radiation from rails incorporates a series of oscillation mass (8) of different sizes held in position by layers of resilient material (9) and attached to the rail via several steel mounting plates (4). Each mounting plate (4) is fixed to the rail by two magnets (5). A bolt (10) is inserted through the mounting plates (4), resilient layers (9) and oscillation masses (8) alternatively. The bolt (10) is fixed to a middle mounting plate (4) such that different compressive forces can be provided on the two sides by tightening nuts (11) to different pre-set torques. When the resonance frequency of the oscillation masses (8) is tuned to that of rail, most of the rail vibration energy at resonance frequency is transferred to the oscillation masses (8) and eventually dissipated in the resilient layers (9).

Disclosed are a horizontal axis windmill and a manufacturing method for the vane of the wind turbines. The windmill comprises a tower and a wind wheel hub which is provided with vanes, wherein the vanes have structures for designing bending and torsional deforms in advance and structures for designing the prestress at the root of the vane in advance. The method is that the connection line of each section center of the vane is bent or inclined forward from the root to the top, so the vane can keep at straight status from root to top when the windmill is in running; the torsional angle of the aerofoil profile on each section of the vane is designed along the radial direction, the torsional deformation of the vane can be obtained according to the pneumatic load distribution of the vane, and the reverse torsional deform angle of the aerofoil profile on each section is designed in advance to make the torsional angle when the vane is running consistent to the designed geometry torsional angle of the vane; and the root of the vane has stress. When the vanes of the windmill are working, the vanes are basically at radial direction, the inflow flush angle and designed working condition of all the sections are basically consistent, the high efficiency use of wind energy is realized, the root stress of the vane is reduced, and the safety of the vane is improved.

Dark colored polycarbonate compositions and exterior automotive parts produced therefrom with infrared resistance additives are disclosed. The dark colored polycarbonate compositions and parts impart enhanced thermal management and reduce intrinsic heat up of darker materials by incorporation of an improved infrared resistance additive. The dark polycarbonate compositions and automotive parts may be used in various exterior applications including automotive glazing applications.

The invention relates to the technical field of impact and buffering, in particular to a gas damping and buffering free piston. The gas damping and buffering free piston comprises a buffering cavity,an end cover, a buffering piston and a collision body, wherein a buffering gas cavity is formed in the buffering cavity; a buffering gas with a certain pressure can be inflated into the buffering gascavity; one end of the buffering piston penetrates through the end cover to be inserted into the buffering gas cavity; and the other end of the buffering piston is connected with the collision body. According to the gas damping and buffering free piston, as the collision is finished in twice and kinetic energy is consumed in twice, the energy, needing to be absorbed in one time, of the collision body is reduced, the collision time is greatly prolonged to be beneficial for reducing impact load generated by collision, and therefore, the impact load peak value is reduced; in addition, the buffering piston and the collision body stop moving first during collision; and as the buffering gas is available in the buffering gas cavity, the buffering cavity decelerating and stopping time can be greatly prolonged, and direct collision between the buffering cavity and the buffering piston is avoided; and moreover, the pressure in the buffering cavity is gradually increased, the gas damping and buffering free piston is more beneficial for the collision body to recover from the first collision.

The invention relates to a hydraulic wind power generation set and an energy layered-controlled low-voltage ride through control method. When a power grid voltage drops due to a fault, top-layer control is that a pitch angle of a wind turbine is controlled by a pitch angle controller so as to reduce wind energy capturing; intermediate-layer control is that control on a pivot angle of a variable motor is realized by a rotational speed controller, a high-voltage pressure of a hydraulic system is reduced, so that the rotational speed of a fixed displacement pump is increased, and residual power is converted to kinetic energy of a wind wheel; and bottom-layer control is that the opening degree of a proportional throttle valve is controlled by a power controller, residual energy is converted to thermal energy, and finally, storage, consumption and release of residual energy are realized during the low-voltage ride through process. The transmission energy of the machine set is controlled by pitch adjustment, wind abandoning, inertia energy storage of the wind turbine and proportional throttling coordinated control, the residual energy of the machine set is suppressed from a source, and the energy loss during the low-voltage ride through process is also effectively prevented; and meanwhile, by adding a proportional throttling stage, the system response is sped up, and the system is flexible in action.

Hot rolled steel sheet which has a maximum tensile strength of 600 MPa or more and has an excellent low temperature impact energy absorption and HAZ softening resistance and a method of production of the same are provided, that is, sheet which contains, by mass %, C: 0.04 to 0.09%, Si: 0.4% or less, Mn: 1.2 to 2.0%, P: 0.1% or less, S: 0.02% or less, Al: 1.0% or less, Nb: 0.02 to 0.09%, Ti: 0.02 to 0.07%, and N: 0.005% or less, where 2.0≦Mn+8[% Ti]+12[% Nb]≦2.6, has a balance of Fe and unavoidable impurities, has an area percentage of pearlite of 5% or less, has a total area percentage of martensite and retained austenite of 0.5% or less, has a balance of a metal structure of ferrite and/or bainite, has an average grain size of ferrite and bainite of 10 μm or less, has an average particle size of alloy carbonitrides with incoherent interfaces which contain Ti and Nb of 20 nm or less, and has a yield ratio of 0.85 or more.

The invention relates to a method for improving the sulfur dioxide trapping performance of a functionalized ionic liquid. The introduction of a nitrile group to the anion of the functionalized ionic liquid increases the sulfur dioxide absorption capability and improves the desorption performance of the ionic liquid, so the efficient and reversible trapping of a sulfur dioxide gas is realized. The method concretely comprises the following steps: absorbing the sulfur dioxide gas by treating the nitrile group-containing anionic functionalized ionic liquid as an absorbent under an absorption pressure of 0.1MPa at an absorption temperature of 20-100DEG C for 0.1-5h; and desorbing at a desorbing temperature of 60-150DEG C for 0.1-5h. In the above technical scheme, the ionic liquid has the advantages of good stability, high absorption capability, easy desorption and the like, so the sulfur dioxide trapping method has a large industrial application potential.

A device for spectroscopy using charged analytes has an electron generator, which sends electrons through membrane into a charging chamber. The thermal strain of the membrane may be lowered significantly if a material is selected for the membrane which contains at least one component from the group of oxides, nitrides, and carbides with at least one of the elements B, Al, C, Si, and Ti or polysilicon.

The invention provides a coupling reactor high-voltage direct current fault current limiter. The coupling reactor high-voltage direct current fault current limiter comprises: a coupling reactor unit,a current limiting unit, an energy absorbing unit and a DC circuit breaker unit. The coupling reactor unit is composed of a coupled reactor and a line. When a short trouble is generated, the primary inductor of the coupling reactor and the precharge capacitor of the current limiting unit oscillate, a negative voltage is generated at the secondary side to reduce the current required to be cut off and the line inductor initial energy, and the secondary inductor is the line flat-wave inductor; when the fault occurs, the current limiting unit cooperates with the coupling reactor to generate a negative voltage on the line side; the energy absorbing unit is a diode in serial connection with the resistor to suppress the primary side inductor energy to be transmitted to the secondary side of the coupling reactor; the DC circuit breaker unit includes a DC breaker and a lightning arrester, the breaker cut off the fault current, and the arrester absorbs the energy stored by the inductor. The coupling reactor high-voltage direct current fault current limiter provided by the invention achieves the control of the fault current and the energy absorption limit of the lightning arrester, the capacitor parallel connection reduces the capacity and the cost is low.