56 results about "Linear loss" patented technology

The invention discloses an LED (Light Emitting Diode) driving circuit, which comprises a direct-current (DC) input power supply and at least one branch. The branch is connected between the positive terminal and the negative terminal of the DC input power supply and comprises a plurality of LED groups, bypass circuits and a constant-current source circuit, wherein each LED group is formed by connecting at least one LED in series, the bypass circuits correspond to the LED groups, input terminals of the bypass circuits are connected with positive poles of the LED groups, output terminals of the bypass circuits are connected with negative poles of the LED groups, a single LED group and a single bypass circuit corresponding to the single LED group form a unit link, a unit link group is formed after a plurality of unit links are connected in series, the unit link group is connected between the positive terminal of the DC input power supply and the input terminal of the constant-current source circuit in a series, the output terminal of the constant-current source circuit is connected with the negative terminal of the DC input power supply, and a control terminal of the bypass circuits is connected with a driving terminal of the constant-current source circuit. The LED driving circuit has the advantages of little linear loss, very high reliability, very simple circuit structure, small size, and capability of being formed through partial or all integration.

The invention discloses a dynamic lossless compressing method for real-time historical data in an industrial production procedure, which comprises the following steps: storing the latest real-time data firstly in a compressing buffer area according to a time slice; processing lossless storage to all dynamic real-time data more than a threshold value in each preset time slice; after processing the data in the compressing buffer area in a method of only storing characteristic values of stable-state real-time data with little change according to different preset modes, then, storing the data in a historical data buffer area and a historical data file timely. The method disclosed by the invention realizes computer programming conveniently; filtering distortion phenomenon of each current linear loss compressing algorithm is solved; in addition, integral compressing efficiency of the data is increased on a condition of ensuring relatively high data fidelity.

The invention discloses a high-stability all-solid-state laser which comprises an all-solid-state laser, a Lambada second wave sheet, a polarization spectrometer, a photoelectric detector, a proportion integration differentiation (PID) controller and a temperature controller, wherein a non-linear frequency doubling crystal is inserted into a resonant cavity of the all-solid-state laser, an output light beam of the all-solid-state laser sequentially passes through the Lambada second wave sheet and the polarization spectrometer, reflected light of the polarization spectrometer enters the photoelectric detector, the output end of the photoelectric detector is connected with the PID controller, the output end of the PID controller is connected with a temperature setting end of the temperature controller, the working temperature of the non-linear frequency doubling crystal in the all-solid-state laser is controlled by the temperature controller, and transmission light of the polarization spectrometer serves as system output light. In the high-stability all-solid-state laser, the non-linear loss in a laser cavity is changed by controlling the working temperature of the non-linear frequency doubling crystal, the power fluctuation of the laser is compensated, and high-stability laser output is obtained.

The invention relates to the field of electrical equipment, in particular to a rear plug type case installation rack. The rear plug type case installation rack comprises supporting bases, a guiding element is arranged on each supporting base, two or more case installation positions are arranged on each supporting base side by side in a left and right mode, each supporting base comprises a bearing frame and an air duct plate arranged on the corresponding bearing frame, an air duct is formed by each air duct plate and the corresponding guiding element in an enclosed mode, and the portions, corresponding to the case installation positions, of the matched position of each guiding element and the corresponding air duct plate are provided with through air duct openings. The rear plug type case installation rack solves the problems that an existing case installation rack is large in size, high in weight and large in cooling capacity linear loss.

Methods of deconvolving a feature profile of a physical system are provided herein. The present method may include: optimizing a regression between a) a feature profile of a first plurality of distinct components and b) a reference matrix of feature signatures for a second plurality of distinct components, wherein the feature profile is modeled as a linear combination of the reference matrix, and wherein the optimizing includes solving a set of regression coefficients of the regression, wherein the solution minimizes 1) a linear loss function and 2) an L2-norm penalty function; and estimating the fractional representation of one or more distinct components among the second plurality of distinct components present in the sample based on the set of regression coefficients. Systems and computer readable media for performing the subject methods are also provided.

The invention discloses a ceiling type air conditioner indoor unit. The ceiling type air conditioner indoor unit comprises an indoor unit shell used for being mounted on a ceiling (1), an inner circulation fan blade (6) located in the indoor unit shell and a drive device (4) for driving the inner circulation fan blade (6) to rotate. An air inlet (8) is formed in a panel (9) of the indoor unit shell. Air outlets (7) are formed in side plates (2) of the indoor unit shell. According to the ceiling type air conditioner indoor unit, linear losses generated by the fact that airflow turns in the indoor unit shell and flows out of the panel are reduced; and the short-circuit probability of the airflow is reduced, and the heat exchange effect is enhanced. Natural convection of air in a room is achieved, room surrounding type air supply free of air feeling is achieved, the situation that cold air directly blows to the human body is avoided, and the refrigeration effect and the use comfort in a refrigeration state are improved.

The invention discloses a method for constructing a cascade superlattice mode-locked laser. In the method, cascade optical superlattices are used as nonlinear crystals, the cascade second-order nonlinear effect of two or more sections of domain-structure cascade optical superlattices is utilized to generate equivalent third-order nonlinear effect, and the nonlinear crystals are enabled to work atphase matching points by controlling the temperature of the optical superlattices through controlling the temperature of a furnace; a resonant cavity is adjusted to reach the requirement of nonlinearfrequency conversion; and the position of a diaphragm in the resonant cavity of a laser is set to ensure that the radius of facula at the position of the diaphragm is reduced along with the incrementof pumping power, the diaphragm realizes nonlinear loss modulation and spatial phase modulation is converted into intensity modulation, thus realizing mode locking laser output. The method can obtaina bigger non-linear loss coefficient, thereby being capable of supporting mode locking operation with larger stable area range, realizing self-starting of the mode-locked laser and improving the facula quality, stability and the optical to optical conversion efficiency.

An Ultra-broadband graphene-based saturable absorber mirror (graphene SAM) used as passive mode locker and Q-switch of lasers was invented. The graphene SAM comprises an optical substrate, an Aurum(Au) reflection film and graphene layer(s). Combining the ultra-broadband high reflectivity of Au film with ultra-broadband saturable absorption of graphene, the graphene SAM could be used as saturable absorber for passive mode locking and Q-switching over an ultra-wide spectral range from near-infrared to mid-infrared spectral region. Compared to semiconductor saturable absorber mirror (SESAM), the graphene SAM has the advantages of ultra-broadband operation, low linear loss, easy fabrication, low cost, and enabling mass production. This invented graphene SAM will have a wide prospect of application.

The invention discloses a vacuum preloading soft foundation strengthening method. After a pump drainage type plastic drainage plate with double drainage passages is driven in, an air guide passage in the middle of a core plate of the pump drainage type plastic drainage plate with the double drainage passages is connected with each branch pipe through a pipe plate connecting piece, and each branch pipe is connected with a main pipe; a vacuum pump, the main pipe, the branch pipes, the pipe plate connecting piece and the air guide passage in the drainage plate form a complete continuous vacuum pipeline system; the vacuum pump is used for delivering vacuum negative pressure to soil layers at different depths via water inlet holes at an interval of 2-3 m in the drainage plate through the air guide passage in the core plate, so that the linear loss transferred by the vacuum pressure and the attenuation of the vacuum negative pressure along the plastic drainage plate are reduced, and higher vacuum negative pressure of the entire plastic drainage plate from top bottom is kept; and thus, high vacuum degree is kept in the shallow and deep parts of a soft foundation, the effective strengthening depth and the strengthening effect of the vacuum preloading method are increased, and the strengthening cost is reduced.

An air deflector structure in a main used after flow converging of induced draft fans comprises an air deflector located at an outlet of the first steam-driven induced draft fan, an air deflector located at an outlet of the second steam-driven induced draft fan, an air deflector located at a corner and an internal baffle. All the air deflectors and the baffle are vertically arranged in the main communicated with the outlet of the first steam-driven induced draft fan, an outlet of the electric induced draft fan and the outlet of the second steam-driven induced draft fan in the height direction. The pipeline structure of the main is a wall body structure. The air deflector at the outlet of the first steam-driven induced draft fan, the air deflector at the outlet of the second steam-driven induced draft fan, the air deflector at the corner and the internal baffle are connected with the inner wall of an upper wall body and the inner wall of a bottom wall body of the main. The defects that in the prior art, the flow field in the main after flow converting is complex, and eddies and other phenomena exist, so that linear loss is increased, vortexes which may exist in a smoke flow field of a flue outlet have bad influences on a desulfurizing tower, even slurry is entrained by the vortexes and enters the main, and safe operation of the induced draft fans is affected when the situation is severe are overcome.

The invention belongs to the technical field of piling machinery construction equipment of mechanical engineering and civil engineering, machinery parts and transmission devices and discloses a hydraulic system for a hydraulic pile hammer. The hydraulic system for the hydraulic pile hammer comprises a double-wall hydraulic cylinder (6), a hydraulic slide valve (5), a loading valve (1), a two-position four-way control valve (2), a low-pressure energy accumulator set (3), a hydraulic hammer travel switch set (4), a high-pressure energy accumulator set (7) and a power source. An integrated structure is adopted by the hydraulic system provided by the invention; the pipeline length and the possible bend are reduced; the linear loss is greatly reduced; and the effect is more obvious especially under the conditions of large flow and high pressure.

The invention provides a method for lowering water conveying pipe head losses. An antifriction material is attached or coats the inner wall of a water conveying pipe. The antifriction material is a sharkskin simulating antifriction material or a nanometer super-hydrophobic material. The sharkskin simulating antifriction material can be directly stuck to the surface of the water conveying pipe, the surface of the water conveying pipe can also be coated with a substrate material layer at first so as to improve the bonding force between the sharkskin simulating material and the pipe wall; the surface of the water conveying pipe can be coated with the nanometer super-hydrophobic material directly and can also be coated with a substrate material layer at first so as to improve bonding force between the nanometer material and the pipe wall. The nanometer super-hydrophobic material can be mixed with the nanometer antifriction material for use so as to achieve the purposes of lowering frictional resistance and resisting corrosion; the method can lower the adhesive power and flow resistance of the solid-liquid surface, the hydrophobic performance of the surface of the water conveying pipe is effectively improved, and linear losses in the pipe water conveying process are reduced.

The invention relates to an internal spiral groove oil suction pipe for a variable-frequency refrigerator compressor, and belongs to the technical field of refrigeration compressor accessories. The internal spiral groove oil suction pipe comprises an oil suction pipe main body and embedded internal spiral grooves, wherein more than one embedded internal spiral grooves which are conical and coaxial with the oil suction pipe main body are formed in the oil suction pipe main body; a cylindrical part of the oil suction pipe main body is fixed through a center hole of a motor rotor, and then connected with the end face of a crankshaft. The internal spiral groove oil suction pipe disclosed by the invention uses an embedded internal spiral groove structure, and is low in oil suction resistance, high in oil pumping capacity, good in lubricating effect, low in linear loss, and long in service life; the compressor is stable and reliable in working; the oil suction pipe main body is fixed through the center hole of the motor rotor, and then connected with the end face of the crankshaft, so that the oil suction pipe is convenient to assemble and simple in manufacturing technology; the internal spiral groove oil suction pipe solves the problems that the existing oil suction pipe is high in oil pumping resistance and low in oil pumping capacity, and has high probability of causing lubrication failure to severely influence the service life of the variable-frequency compressor as an external thread structure is used, and the oil suction pipe is assembled together with the crankshaft or the motor rotor through a tail sleeve.

The invention discloses a method for judging the chemical-viscosity-reduction assisted thickened-oil screw pump lifting technology. The method includes: determining relevant parameters of oil-deposit oil wells produced and developed, determining lift of a screw pump through oil deposit depth, determining lifting speed according to daily output, performing subsection calculation on the oil wells, and calculating friction loss of each section in subsection iteration; summarizing linear loss and wellhead back pressure, comparing the sum of the linear loss and the wellhead back pressure with the lift of the screw pump, and if values are different, repeating the step after viscosity-temperature curves are changed till the values are identical; calculating viscosity of crude oil, corresponding to reservoir temperature, at the position of the downhole through the viscosity-temperature curves. Screw pump lifting is prepared for mining of thickened oil, the chemical viscosity reduction technology is matched in order to prevent insufficient lifting capacity, and certain guidance is given whether to adopt screw pump or not in on-site production and development of shallow thickened oil.

The invention provides a drainage structure for geotextile filter tube vacuum preloading foundation treatment. The structure comprises a drainage system and a seal vacuum pumping system, wherein the drainage system comprises a plastic drainage plate buried in the soil, a filter tube is directly connected with a connector of the plastic drainage plate, and the upper side and the lower side of the filter tube are provided with a layer of geotextile protecting the filter tube respectively; the geotextile is coated on the circumferential surface of the filter tube; the geotextile is coated on the connector of the plastic drainage plate; and the filter tube is one of composite tubes of plastic hose, PVC hard tube and iron tube or hose, PVC hard tube and iron tube. The structure can reduce the linear loss in vacuum degree transfer, and compared with the prior vacuum preloading method, has the advantages of low cost and short construction period, and is not limited by the medium coarse sand source, thereby reducing the linear loss of vacuum degree, shortening the consolidation time and improving the consolidation effect.

The invention provides a slurry pipeline conveying system for controlling accelerated flow and an accelerated flow control method of the slurry pipeline conveying system. By aiming at a slurry conveying pipeline system with a pipeline fully filled with water media under the initial condition, on the basis of the relationship between the pipeline linear loss and the pipeline distance length, a accelerated flow monitoring station used for monitoring a slurry head is arranged in a specific position, in addition, a by-pass pipeline is introduced in a back-stage pump station main pipe, when the accelerated flow monitoring station monitors the slurry head, a by-pass pipeline valve is opened, medium water in a slurry conveying main pipeline is conveyed to a dewatering workshop through the by-pass pipeline, the long-distance linear loss is effectively utilized for counteracting the accelerated flow negative pressure of the accelerated flow monitoring station, the effect of effectively controlling the accelerated flow without starting pressurizing main pump equipment of a back-stage pump station is achieved, various defects of a traditional accelerated flow control mode adopting a pressurizing main pump of the back-stage pump station for improving the pressure are overcome, the slurry pipeline abrasion is reduced, and the operation efficiency and the service life of the slurry pipeline conveying system are respectively improved and prolonged.

The invention discloses a method for judging a relation between power loss of wind space wave energy and sand content distribution of a silt coast. The method comprises the following steps of: (1) obtaining a corresponding relational expression formula Eta(aPw / ax)=(1-Rho / Rhos)ghSomega between the linear loss of the wave energy power and the silt suspension power spatial and temporal distribution under the condition of the silt coast, wherein Pw indicates the wave energy power in unit width, Eta indicates an efficient factor of the conversion of the linear loss of the wave energy power, Rhos and Rho respectively indicate sand grain density and water density, S indicates an average sand content along vertical direction, omega indicates silt settling speed, h indicates water depth, aPw / ax indicates the linear loss of the wave energy power and (1-Rho / Rhos)ghSomega indicates the power required by maintenance for water silt suspension; (2) converting the relational expression formula in the step (1) to obtain Eta=S(1-Rho / Rhos)ghomega / aPw / ax, and obtaining Eta through practical measuring data; and (3) obtaining the average sand content of the water body: S=EtaaPw / ax / (1-Rho / Rhos)ghomega. According to the method provided by the invention, the change process of the sand content of the water body under the storm condition of the silt coast is accurately forecast.

The invention provides a diffuser and a centrifugal fan. The diffuser comprises a separator plate, a plurality of front guide blades uniformly arranged at the periphery of the front side of the separator plate and a plurality of back guide blades uniformly arranged at the periphery of the back side of the separator plate, the periphery of the front side of the separator plate is provided with an inclined portion, the inclined portion has an inclined surface, the thickness of the inclined portion of an air flow channel decreases gradually from a position close to the center of the separator plate to a position of the outer rim of the separator plate, and bottom ends of the front guide blades of the air flow channel are arranged on the inclined surface of the air flow channel. The diffuser of the invention provides sufficient diffusion, and at the same time can realize the optimum diffusion amount through designing the angle of inclination of the inclined surface relative to the separator plate. The centrifugal fan of the invention is equipped with the diffuser of the invention. The centrifugal fan of the invention can avoid the linear loss caused by insufficient diffusion, and therefore the centrifugal fan of the invention has high work efficiency.

The invention relates to a flow mixer integrating post-mixing injection and self-oscillation. The flow mixer comprises a high-pressure water nozzle, an abrasive inlet, a mixing oscillation cavity and a mixing nozzle. Water discharged from a high-pressure pump is accelerated through the high-pressure water nozzle and enters the oscillation cavity, negative pressure is formed in the cavity to allow abrasive to be sucked into the oscillation cavity from the abrasive inlet, the abrasive is sufficiently oscillated and mixed with high-pressure water and accelerated, the mixed and accelerated fluid is sprayed out through the mixing nozzle, and a high-pressure abrasive water jet is formed. The flow mixer has the advantages that the flow mixer is reasonable and compact in structure and convenient to use; the abrasive jet sprayed out by the post-mixing type abrasive nozzle can reduce the abrasion time of a conveying pipe wall and is low in linear loss, less prone to accumulation and capable of preventing pipeline blocking; the jet form using self-oscillation pulses allows the variable-pressure feature and cavitation effect to be enhanced, and work efficiency is increased greatly.

The invention is a direct drinking water low energy consumption circulation technology. Since direct drinking water does not contain disinfectant, it is easy to breed bacteria. When the direct drinking water stays in the pipeline for a long time, it may breed bacteria and cause the water quality to be unqualified. In order to solve this problem, it is generally necessary to circulate the direct drinking water in the pipeline for disinfection. At present, the known direct drinking water circulating water supply system adopts a water pump, which not only provides the circulation power of the pipe network, but also maintains sufficient pressure in the pipe network. The technical effect is not good, and because the system must run continuously, it consumes a lot of energy. To address the above problems, the present invention adopts a brand-new solution, which uses a pressure storage tank to store the water pressure of direct drinking water. The circulation pump only needs to be responsible for the water circulation of the pipe network, and separates the water supply and circulation. The long-term operation of the circulation pump only needs to It is enough to overcome the loss along the process, so a circulating pump with low lift and low flow can be selected to achieve the purpose of saving energy and reducing consumption.

The invention discloses an oil field water injection simulation experiment platform and mainly aims to provide a water injection simulation experiment device. The oil field water injection simulationexperiment platform is characterized in that the oil field water injection simulation experiment platform comprises a pipe network system, a simulated well system, a supporting frame structure, a baseplate mechanism and a work station; the pipe network comprises a spiral pipeline, a flow direction measuring device and a multi-way valve; the simulated well system comprises a plurality of simulatedwell units and is used for simulating the well mouth pressure in actual water injection; the supporting frame structure comprises two parts of a hydraulic vertical column unit and a frame unit, the base plate mechanism is divided into an upper layer and a lower layer and comprises a lower base plate and an upper base plate, and a hydraulic travelling mechanism is mounted on the lower base plate and can drive a whole system to move in the front-back direction and the left-right direction; and the work station comprises a water tank, a waster pump, a hydraulic oil tank and a valve box. According to the water injection simulation experiment device, the linear loss in well mouth pressure and actual oil field water injection can be simulated, the length of a spiral pipe and the number of wellmouths can be flexibly combined, the diversified simulation conditions can be met, an oil field water injection system is simulated, a water injecting pump is adjusted to reach the optimum displacement, and energy and water resources are saved.

The invention relates to a pressure-adjustable expansion machine with a slip sheet. The structure of the pressure-adjustable expansion machine comprises a first-level compressor and a second-level compressor, wherein the first-level compressor is formed by a first air suction port, a stator, a rotor, a first slip sheet and a first valve plate; the second-level compressor is formed by a second air suction port, a stator, a rotor, a second slip sheet, a second valve plate and a check valve; the first valve plate of the first-level compressor and the check valve of the second-level compressor are connected by a sealed pipeline A; a group of compressor used as the terminal end is used for connecting a pressure gas storage tank; an engine device is formed by a stator, a rotator, and a third slip sheet and an exhaust port on the rotor; a pressure adjusting valve on the engine device is connected with the pressure gas storage tank by a sealed pipeline B; the tip of the third slip sheet has a bevel, and a cavity clamping slot is formed between the bevel and the rotor, so that a sealed cavity is formed among the third slip sheet, the rotor and the stator; and when the rotor rotates, gas and fuel oil enter via the cavity, so as to increase a transmission area and further increase acting of the engine. According to the invention, since linear loss is achieved, loss is small, acting is great, transmission damage is reduced, and a clutch can be directly connected.

The invention relates to an efficient snakelike heat exchange device utilizing the Dean Vortice effect. The efficient snakelike heat exchange device utilizing the Dean Vortice effect comprises a shell, a cooling medium inlet, a cooling medium outlet, a process medium inlet, a process medium outlet, a support and the like. When fluid medium flows in a snakelike heat exchange pipe, the Dean Vorticewith symmetrical vertex core distribution can be formed, and a remarkable acceleration function is achieved on fluid heat exchange. According to the efficient snakelike heat exchange device utilizingthe Dean Vortice effect, by analyzing and evaluating the intensity of the Dean Vortice and the heat exchange efficiency, the Dean Vortice intensity index corresponding to the optimum heat exchange efficiency is selected, optimal design is conducted on the structural parameter of the snakelike heat exchange pipe and the dimension parameter of the shell of the efficient snakelike heat exchange device, so that the fluid medium can reach the full turbulence state in the tube pass flowing process under the conditions of a small resistance force and linear loss, the thicknesses of a flow boundary layer and a temperature boundary layer close to the tube wall can be effectively lowered, the initiative convection heat exchange process is enhanced in the medium flow process, and the overall heat exchange efficiency of the efficient snakelike heat exchange device utilizing the Dean Vortice effect is improved. The efficient snakelike heat exchange device utilizing the Dean Vortice effect can be widely applied to the fields of oil refining, chemical industry, light industry, sewage treatment and the like and is wide in application range, high in heat exchange efficiency, excellent in performance and high in practicability,

The invention discloses a rail traffic vehicle auxiliary brake control system which comprises a filter arranged on a pipeline and communicated with a main air pipe, a check valve communicated with thefilter, and a plurality of connecting ports. The main air pipe is communicated with the auxiliary brake control system. The check valve is communicated with a brake air storage cylinder. The auxiliary brake control system further comprises an overflow valve communicated with the filter, a depressurizing valve communicated with the overflow valve. a third plug communicated with the check valve, athrottling valve communicated with the third plug, a controllable valve communicated with the throttling valve, and a second plug communicated with the controllable valve. The depressurizing valve iscommunicated with an air spring system. The overflow valve is communicated with an air spring air storage cylinder. The second plug is connected with a parking brake unit. The auxiliary brake controlsystem integrates the air filtering and supplying functions of the brake air storage cylinder and the air supply and vehicle parking brake control functions of the air spring system; corresponding installing supports and installing pipelines can be reduced, the linear loss of the pipelines is reduced, and the response speed of the system is increased.

The present invention discloses a superficial layer heavy oil reservoir single-phase flow screw pump lifting prejudgment method. The method comprises the following steps: selecting an oil well with a suitable depth for production of a screw pump, determining relevant parameters of the produced and developed oil reservoir oil well, determining the lift and the lifting speed of the screw pump, and calculating the gravity pressure loss; performing subsection calculation of the oil well, and performing subsection iteration calculation of the frictional resistance loss of each section; performing summation of the frictional resistance loss of each section to obtain a total frictional resistance loss, and performing summation of the total frictional resistance loss and the gravity pressure loss to obtain a linear loss, comparing the linear loss with the lift of the screw pump obtained in the step 2, if the linear loss is larger than the lift of the screw pump, allowing the screw pump not to be lifted; and or else, lifting the screw pump. The superficial layer heavy oil reservoir single-phase flow screw pump lifting prejudgment method is a method for determining whether the screw pump is lifted or not aiming at the superficial layer heavy oil reservoir with high crude oil viscosity and free from gas and water so as to give a certain guide for the determination of whether the screw pump is employed for production and development of the field superficial layer heavy oil or not.

The invention discloses a method for predicting the lifting of two-phase flow screw pump of a shallow-layer heavy oil reservoir. The method comprises the following steps: selecting an oil well in a proper depth for screw pump production; determining the relevant parameters for the produced and developed oil well of the oil reservoir; according to the depth of the oil reservoir, determining the delivery lift of the screw pump; determining the lifting speed on the basis of the daily production amount; calculating the oil well in sections; performing iterative calculations in sections for the friction resistance loss of each section; summing up the general friction resistance loss and the gravity pressure loss to obtain the linear loss; comparing the linear loss with the delivery lift of the screw pump obtained from the step 2; if the linear loss is greater than the delivery lift, then indicating that the screw pump cannot lift; and otherwise, using the screw pump to lift. The method is designed as a method to predict whether a screw pump is used to lift for production or not for a shallow-layer heavy oil reservoir containing high-viscosity crude oil, gas, and water and provides certain guidance on whether to use a screw pump to produce and develop shallow-layer heavy oil.

The invention relates to a high-efficiency coil pipe heating and ventilating device with a Dean Vortice effect. The heating and ventilating device comprises a water inlet pipe, a water inlet distributor, a water outlet converger, a water outlet pipe, a coil pipe heat-radiating pipe, a support plate and the like. A fluid medium can form Dean Vortice with symmetrical vortex core distribution when flowing in the coil pipe heat-radiating pipe, so that a remarkable promotion effect is achieved on fluid heat exchange. According to the high-efficiency coil pipe heating and ventilating device, throughanalyzing and evaluating the Dean Vortice intensity and the heat exchange efficiency, selecting a Dean Vortice intensity index corresponding to the optimal heat exchange efficiency, and optimally designing structure parameters of a heat exchange pipe and inlet and outlet parts, the fluid medium achieves a sufficient turbulence state under the conditions of less resistance and linear loss during the tube pass flowing process, the thicknesses of a flowing boundary layer and a temperature boundary layer near the pipe wall are effectively reduced, the initiative heat convection heat exchange process during the medium flowing process is improved, and the whole heat exchange efficiency of the equipment is improved. The heating and ventilating device can be widely applied to the heating and ventilating field, and is wide in application range, high in operating efficiency and high in practicability.

The invention discloses a novel vacuum preloading system and a treatment method for soft soil foundation treatment. The novel vacuum preloading system comprises a vacuum-pumping system comprising a vertical vacuum-pumping device and a transverse vacuum-pumping device. The vertical vacuum-pumping device comprises conversion joints, drainage plates and vacuum-pumping pipes. Conversion joints outer connecting pipes extend upward, and the drainage plates penetrate through the conversion joints. The transverse vacuum-pumping device comprises a main pipe, filter pipes, hand-type joints, four-way connectors and steel wire hoses. The upper ends of the drainage plates are connected with the lower ends of the drainage plate hand-type joints. Hand-type joints outer connecting pipes are connected with the filter pipes. The four-pass connectors are connected with the hand-type joints outer connecting pipes and the steel wire hoses correspondingly. The other ends of the steel wire hoses are connected with the lateral vacuum-pumping pipes, and the other ends of the lateral vacuum-pumping pipes are connected with the conversion joints outer connecting pipes. The two ends of the main pipe are connected with the filter pipes and a vacuum pump correspondingly. The linear loss of the vacuum degree is reduced, the efficiency of vacuum preloading is greatly increased, and the novel vacuum preloading system is easy and convenient to construct, low in cost, short in construction period, and suitable for the wide-range use.

The invention discloses a dynamic lossless compressing method for real-time historical data in an industrial production procedure, which comprises the following steps: storing the latest real-time data firstly in a compressing buffer area according to a time slice; processing lossless storage to all dynamic real-time data more than a threshold value in each preset time slice; after processing the data in the compressing buffer area in a method of only storing characteristic values of stable-state real-time data with little change according to different preset modes, then, storing the data in a historical data buffer area and a historical data file timely. The method disclosed by the invention realizes computer programming conveniently; filtering distortion phenomenon of each current linear loss compressing algorithm is solved; in addition, integral compressing efficiency of the data is increased on a condition of ensuring relatively high data fidelity.