114results about How to "Reduce the effect of drag" patented technology

A wing tip device for fixing to the outboard end of a wing, the wing defining a wing plane, includes: an upper wing-like element projecting upwardly with respect to the wing plane and having a trailing edge; and a lower wing-like element fixed with respect to the upper wing-like element and having a root chord and a trailing edge, the lower wing-like element root chord intersecting with the upper wing-like element, and the lower wing-like element projecting downwardly from the intersection. The upper wing-like element is larger than the lower wing-like element and the trailing edge of the lower wing-like element is adjacent the trailing edge of the upper wing-like element at the intersection. An included angle between the upper and lower wing-like elements at the intersection is less than, or equal to, 160 degrees.

The invention relates to a compound air filter material and a method for preparing the same. The composite air filter material used for filter bags comprises a protective layer, a deodorizing layer and a filter layer, wherein the protective layer and the filter layer are compounded on two side faces of the deodorizing layer respectively; the protective layer is made of wood pulp fiber filter paper, spun-bond non-woven fabric or spun-lace non-woven fabric, and the gram weight of the material of the protective layer is 10 to 200g/m; the deodorizing layer is made of one of active carbon, zeolite , sodium bicarbonate, magnesium aluminum silicates and silica gel or a mixture of any two of the wood pulp fiber filter paper, the spun-bond non-woven fabric and the spun-lace non-woven fabric, and the gram weight of the material of the deodorizing layer is 10 to 300g/m; and the filter layer is made of melt-blown non-woven fabric, wood pulp fiber filter paper or SMS non-woven fabric, and the gram weight of the material of the filter layer is 10 to 100g/m. The compound air filter material has high filtration efficiency and deodorization efficiency, low filtration resistance and high dust capacity.

A plasma-induced drag reduction device is mounted on an underside of a vehicle front fascia. The drag reduction device has a dielectric substrate formed of a dielectric material, a first electrode mounted on a bottom, exposed surface of the dielectric substrate, and a second electrode mounted a top surface of the dielectric substrate and insulated by the dielectric substrate, and a power source connected to the first and second electrodes. The second electrode is disposed in a rearward direction relative to the first electrode. When activated, the device generates a plasma region that attracts an air flow passing underneath the vehicle, reducing the separation of the flow field and thereby reducing the impingement of the air flow on the ground and reducing the drag on the vehicle.

Easily implemented randomization within a flash memory EEPROM reduces the NAND string resistance effect, program disturbs, user read disturbs, and floating gate to floating gate coupling that result from repeated and long term storage of specific data patterns. The randomization may be code generated pseudo randomization or user driven randomization in different embodiments. User driven commands, the timing of which cannot be predicted may be used to trigger and achieve a high level of randomization. Randomly altering the encoding scheme of the data prevents repeated and long term storage of specific data patterns. Even if a user wishes to store the same information for long periods, or to repeatedly store it, it will be randomly encoded with different encoding schemes, and the data pattern will therefore be varied.

The invention discloses a self-rotating and cleaning device of dirt in a heat transfer tube, comprising a spiral hairbrush arranged in the heat transfer tube of a heat exchange tube and can moves in a straight line in the tube, wherein the spiral hairbrush is arranged on a traction shaft by a connecting rope; one end of the connecting rope is connected with the spiral hairbrush; and the other end of the connecting rope passes through a pipe inlet of the heat transfer tube of the heat exchanger and is fixed on the traction shaft which is connected with a drive device through a driving mechanism. Scale attached to the wall of the heat transfer tube of the heat exchanger is removed under the action of friction and cleaning of the spiral hairbrush. In addition, when the self-rotating and cleaning device is free from cleaning, the spiral hairbrush has little influence on the fluid resistance and the flow change of the fluid can be correspondingly reduced by adopting a structure that the spiral hairbrush can be clamped on a dual-layer metal mesh away from an outlet of the heat transfer tube at a certain distance. In addition, the connecting rope is free from being stressed when not being for cleaning, so that the durability of the self-rotating and cleaning device can be greatly improved, the self-rotating and cleaning device can meet the requirement for operating for a long term and can be applied on general heat exchangers with the flow speed of the fluid being greater than 1m/s on a large scale.

A Solanum lycopersicum plant including within its genome at least one Tomato Spotted Wilt Virus (TSWV) resistance allele and at least one Phytophthora infestans resistance allele. The resistance alleles are present in the coupling phase at different loci on one chromosome and the plant is resistant against TSWV and resistant against at least Phytophthora infestans. A method for producing a hybrid Solanum lycopersicum plant including (a) obtaining a Solanum lycopersicum plant having within its genome at least one Tomato Spotted Wilt Virus (TSWV) resistance allele and at least one Phytophthora infestans resistance allele in the coupling phase; and (b) crossing the Solanum lycopersicum plant with a second Solanum lycopersicum plant bearing an additional resistance allele.

The invention relates to a flat-panel solar photovoltaic water-heating air-heating compound heat collector which comprises a box, evenly distributed copper tubes, an inlet tube, an outlet tube and a glass cover plate. A heat absorption plate is disposed in a cavity between the glass cover plate and the copper tubes. The copper tubes contact with the heat absorption plate. An air interlayer is formed between the glass cover plate and the heat absorption plate. Photovoltaic cells are evenly disposed on the top surface of the heat absorption plate, adjacent to the glass cover plate. The bottom surface of the heat absorption plate is evenly provided with micro flow stoppers. Two widthwise walls of the box below the bottom surface of the heat absorption plate are provided with an air inlet and an air outlet respectively. A through air channel is formed in the box below the bottom surface of the heat absorption plate. The flat-panel solar photovoltaic water-heating air-heating compound heat collector allows for frequency-by-frequency utilization of solar energy to generate electric energy and heat energy simultaneously, so that utilization rate of solar energy is increased greatly. The water-heating or air-heating modes can be selected according to season and environment requirements, yearly full utilization of light and heat is achieved, the temperature of a photovoltaic plate is lowered, and photoelectric conversion rate is increased.

The present invention provides devices and methods for reducing or eliminating sources of systematic errors in the measurement of absolute gravity or gravity field gradients; specifically, an improved test mass for an interferometer is disclosed that reduces the influence of nearby electromagnetic fields on a freefalling test mass.

An apparatus includes a group of data cells and a reference cell coupled to the group of data cells. The reference cell includes four magnetic tunnel junction (MTJ) cells. Each of the four MTJ cells is coupled to a distinct word line. Each of the four MTJ cells includes an MTJ element and a single transistor. The single transistor of each particular MTJ cell is configured to enable read access to the MTJ element of the particular MTJ cell.

A variable resonator has a dielectric substrate 2, an input/output line 3 formed on the dielectric substrate 2, a first resonator 4 that has one end connected to the input/output line 3 and the other end grounded, and a second resonator that has one end connected to the input/output line 3 at the point of connection of the one end of the first resonator 4 and the other end grounded via a terminal switch 7. When the terminal switch 7 is turned off, resonance occurs at a frequency at which the sum of the line lengths of the first resonator 4 and the second resonator 6 equals to a quarter of the wavelength. When the terminal switch 7 is turned on, resonance occurs at a frequency at which a half of the sum of the line lengths equals to a quarter of the wavelength.

A method for manufacturing stable lightweight cement slurry in a continuous manner for downhole injection comprising the steps of manufacturing a foamed gas having desired density ranging from about 2.15 to about 2.35 lb/cubic ft. and utilizing foam stabilizing nonionic surfactant. And, an apparatus for carrying out the method.

An aerodynamic unit is attached onto a roof of a road vehicle so that air passes over the unit during forward movement of the road vehicle. The unit has a first end for positioning distal to a rear end of a vehicle roof and a second end for positioning proximal a rear end of a vehicle roof. The unit includes an inclined guide portion which decreases in height in a direction towards the trailing end of the unit. The unit also includes a flow director, which directs air flow to the guide portion, disposed at or near the leading end of the aerodynamic unit. The flow director has a height increasing in a direction from the leading end towards the trailing end. The unit may include vortex generators protruding from the guide portion. A fin may extend along each side of the unit in a direction between the trailing end and the leading end.

In this high tech computer world the lowly foam rubber mouse pad has a heretofore untapped feature which can be employed to solve a common desktop problem for the personal computer user. By making a simple enhancement of the mouse pad, which takes about 30 seconds to install, the user can take control of mouse cord movement on the desktop. The computer mouse cord, always problematic on the desktop, is collared by a simple binder clip attached to the mouse pad itself wherein the cord is squeezed snuggly against the vertical foam rubber edge of the mouse pad to give frictional control of the mouse cord length for the user at the mouse pad thereby eliminating the cord drag problem and optimizing user control of the mouse apparatus on the mouse pad with all this being accomplished in a very unobtrusive manner on the user's desktop.

The invention discloses an air conditioner. A heat exchanger arranged in the air conditioner comprises a distributor, and the distributor is used for evenly distributing gas-liquid two-phase refrigerating fluid into multiple flat pipes. A mixing cavity, a backflow cavity and multiple flow dividing sections are formed in the distributor, and the gas-liquid two-phase refrigerating fluid input from arefrigerating pipeline flows in the mixing cavity. The backflow cavity communicates with the mixing cavity, and part of the refrigerating fluid in the mixing cavity can flow back into the mixing cavity through the backflow cavity. The multiple flow dividing sections communicate with the multiple flat pipes in a one-to-one correspondence manner, and inlets of the multiple flow dividing sections communicating with the multiple flat pipes arranged below communicate with the mixing cavity, and inlets of the multiple flow dividing sections communicating with the multiple flat pipes arranged abovecommunicate with the backflow cavity. According to the distributor, even mixing of the gas-liquid two-phase refrigerating fluid can be achieved, the uniformity of the refrigerating fluid in differentflat pipes is improved, and the heat exchange effect of the heat exchanger and the air conditioner is improved.