42 results about "Pressure phases" patented technology

A method and system for non-invasive treatment of a soft tissue, such as adipose tissue, muscle tissue or connective tissue. The apparatus comprises an applicator configured to apply a pressure pulse to the skin surface having a negative pressure phase with respect to ambient pressure. The method comprises applying at least one pressure pulse to the skin surface overlying the soft tissue, where the pressure pulse has at least one negative pressure phase.

The invention relates to a dual-purpose cabin for dynamic pressure calibration of optical pressure sensitive coatings. The dual-purpose dynamic pressure calibration cabin is mainly used for dynamic pressure calibration of pressure sensitive coatings, meets special requirements of the pressure sensitive coatings for a dynamic calibration device, and fills the blank of domestic research in the field. Meanwhile, the calibration cabin is matched with a solenoid valve and a loudspeaker in use, and the effect of dual purposes can be achieved as aperiodic calibration and periodic calibration can be completed. To ensure convenient switching between a pressure phase step mode and a sine mode, a cabin body of the calibration cabin is specially provided with a structure for fixing pressure signal generation sources, namely the solenoid valve and the loudspeaker. A light path is designed on the calibration cabin to meet requirements of pressure testing of the pressure sensitive coatings for ultraviolet light. In addition, damping materials are pasted on the inner wall surface of an experiment section of the calibration cabin to reduce the size of the calibration cabin and avoid the interference of pressure reflected waves on calibration. The dual-purpose cabin is simple in structure, convenient to process and strong in the interference resistance, and can effectively reduce test cost.

A method is disclosed for estimating a formation pressure using a formation tester disposed in a wellbore penetrating a formation, said method comprising: (a) establishing fluid communication between a pretest chamber in the downhole tool and the formation via a flowline, the flowline having an initial pressure therein; (b) moving a pretest piston in a controlled manner in the pretest chamber to reduce the initial pressure to a drawdown pressure during a drawdown phase; (c) terminating movement of the piston to permit the drawdown pressure to adjust to a stabilized pressure during a build-up phase and measuring simultaneously in relation to time, pressure P(t) and temperature T(t) in the pretest chamber; (d) extracting an index i(t) dependent of the pressure P(t) and the temperature T(t) informing on the build-up phase; (e) analyzing index i(t) and repeating steps (b)-(d) or going to step (f); (f) determining the formation pressure based on a final stabilized pressure in the flowline. And more generally a method could be used for estimating type of a build up pressure phase, the build up pressure phase being done after a drawdown pressure phase, said both drawdown and build up phases being done to determine formation pressure using a formation tester disposed in a wellbore penetrating a permeable formation, said permeable formation being able to create a formation flow, said method being characterized by using an index to determine the contribution of formation flow on the pressure build up phase.

The invention relates to a device for discharging a fluid medium from a space (101), which is pressure-damped as opposed to an environment, into the environment (102). The invention further relates to a valve arrangement for discharging a fluid medium from a space, which is pressure-damped as opposed to an environment, into the environment, comprising an inlet opening (103), which is in gas pressure contact with the pressure-damped space in the installed position, an outlet opening (104) positioned below the inlet opening in the installed position in the direction of gravity, said outlet opening being in gas pressure contact with the environment in the installed position, a connecting channel (110) connecting the inlet opening to the outlet opening, a return flow stop valve (120), which is configured in order to allow the fluid medium to pass from the inlet opening to the outlet opening under the influence of gravity, and in order to close it off if a predetermined gas overpressure present in the environment as opposed to the pressure-damped space is exceeded, a through-flow stop valve (130), which is configured to allow the fluid medium to pass from the inlet opening to the outlet opening under the influence of gravity, and to close it off if a predetermined gas overpressure present in the pressure-damped space as opposed to the environment is exceeded.

The invention discloses an antineoplastic medicine prepared through gelsmium elegans medicinal materials. The antineoplastic medicine comprises the following steps that fresh gelsmium elegans rattan stems and/or roots and/or leave and/or dry medicinal slices are taken, steeping and extracting are conducted, ethyl alcohol is recycled by reducing pressure, concentration is conducted until the alcohol taste is eliminated, acid is added for dissolving, PH is adjusted, and upper clear liquid is taken; alkali is added, PH is adjusted to be 9-10, solution extraction is conducted, organic solvent is recycled, and gelsmium elegans total alkaloid extractum is obtained; the extractum is dissolved through methyl alcohol and the like and blended with silica gel, drying and crushing are conducted, the upper silica gel is prepared to a column, gradient elute is conducted by organic solvent, and rough-wrought portions of sempervirine are obtained; and high-middle-pressure phase reversal silica gel column preparation is conducted. The gelsmium elegans total alkaloid begins to exert influences on activity of tumour cells after being added for four hours, and the multiplication speed of the tumour cells is lowered a little compared with a blank group; and the sempervirine begins to exert influences on activity of the tumour cells after being added for five hours, the sempervirine with a low dosage can lower the multiplication speed of the tumour cells, and the sempervirine with a high dosage can kill the tumour cells.

The invention discloses a high-performance cationic rosin size and a preparation method thereof. The high-performance cationic rosin size is prepared by adopting an interworking emulsification system of an amphoteric polymeric emulsifier and a high-cationic-degree polymeric emulsifier and by using a normal-temperature normal-pressure phase inversion method. The preparation method is simple in preparation process and relatively small in investment, and compared with a cationic rosin size prepared by using a conventional normal-temperature normal-pressure phase inversion method, the high-performance cationic rosin size prepared by the method disclosed by the invention is not liable to bubble, relatively small in particle size and relatively good in stability.

The invention belongs to the technical field of phase change material energy storage, and in particular, relates to a normal-pressure phase change heat storage device. The device comprises main waterinlet and water outlet pipes connected with a circulating system, and heat supply water inlet and water outlet pipes and heat storage water inlet and water outlet pipes placed in a liner and connectedwith the main water inlet and water outlet pipes; and water distribution holes are mechanically formed in the water inlet and water outlet pipes in the device in proportion. A heat supply electric two-way valve communicating with the heat supply water outlet pipe and a heat storage electric two-way valve communicating with the heat storage water outlet pipe are additionally mounted out of an outer shell; multiple layers of separation plates are arranged in the liner; energy storage balls are placed in the separation plates; and the liner is provided with a water feeding port, a water overflowing port, a dirt discharge port, a liquid level sensor and a maintenance port communicating with the outer shell and an insulation material. The device has the advantages of reliable structure, stableheat outputting, high heat efficiency, simple installation, high heat exchange efficiency and high unit volume heat storage quantity.

The invention discloses a tight oil steam flooding steam temperature design method, and aims at defining the optimal steam temperature range in a tight oil reservoir and calculating the change degreeof formation pressure when the temperature of the oil reservoir is heated to different degrees by taking a crude oil thermal expansion coefficient and a compression coefficient tested by a high-temperature and high-pressure phase analyzer as the basis. Meanwhile, a calculation method of the optimal steam temperature is provided under the condition of considering the starting pressure gradient andthe rupture pressure. According to the method, the limitation that steam flooding is only suitable for thick oil development in the past is broken through, a theoretical basis is provided for tight oil supplementing stratum energy parameter optimization and a new method is provided for improving the tight oil development effect.

The invention discloses an experimental device capable of accurately measuring the high-pressure volume change rate of a phase-change material. The experimental device comprises a phase-change material exhaust system, a phase-change heat exchange system, a displacement monitoring system, a pressure regulation and control system and a temperature control system. The phase-change material exhaust system comprises a vacuum pump and a vacuum tank; the phase-change heat exchange system is a part for containing a phase-change material to be tested; the displacement measuring system mainly comprises a piston rod and a laser displacement sensor; the pressure regulation and control system mainly comprises a pressure gauge, an overflow valve, a high-pressure oil cavity, a high-pressure oil pump and a high-pressure oil storage tank; the temperature control system mainly comprises a constant-temperature water tank, an electric heater, a compression refrigerator and a PID temperature controller. The high-pressure oil cavity and the overflow valve are used in cooperation to achieve stable pressure control, then the constant-pressure phase change process of the phase change material is achieved, meanwhile, measurement errors caused by the fact that the volume of high-pressure oil changes along with pressure are completely eliminated through measurement of the volume change rate, and finally accurate measurement of the volume change rate of the phase change material under different pressures is completed.

The invention relates to the technical field of food processing and particularly relates to a processing method of melon seeds. The processing method comprises the following steps: screening, preparing materials, boiling, drying, frying, cleaning and selecting and packaging. According to the processing method of the melon seeds, the melon seeds are added into a boiling pot and then are vacuumized, so that air in inner pores of the melon seeds can be removed very well and pre-boiling materials can penetrate into the melon seeds very well; two different negative-pressure phases are set so that the tasty effect is relatively good and inner parts and outer parts of the melon seeds are tasty; the processing time is short and seed kernels of the processed melon seeds are crispy; the loss of nutrients is relatively less and shells and membranes have good color and luster; and the taste of the product and the comprehensive level of the melon seeds are remarkably improved and the popularization and application values are very good.

The invention discloses a low-emission three-loop lean oil pre-mixing and active combustion control device and method, and aims at solving the problem that the pre-mixing of the lean oil in the working process of an existing gas turbine or aircraft engine leads to unstable combustion, resulting in high combustion pollutant emission. The method is characterized in that a pre-mixing equivalence ratio based fuel oil control mode is that the lean oil is pre-mixed and the equivalence ratio of the fuel oil and the air is controlled to achieve the full combustion of the fuel oil and the reduction of the temperature of combustion flame, so as to realize the reduction of NOx emission; an acoustic pressure phase delay based fuel oil control mode is that the fuel oil filling time is controlled to inhibit the unstable thermal noise in combustion according to the measured noise pressure vibration condition and through the phase delay algorithm; an LMS (Least Mean Square) based fuel oil control mode is that the temperature of a combustion low-cycle heat release circulation area is measured, and then the LMS algorithm is carried out to control the fuel oil filling quantity so as to solve the problem of thermal shock of the low-cycle heat release circulation area, and as a result, the combustion instability can be reduced.

The invention discloses a negative-pressure phase-change heat dissipation device and a high-heat-flux electronic chip simulation heat dissipation system, which utilize boiling coupling film evaporation to use a water working medium to generate phase change in a negative pressure environment, so as to realize efficient heat dissipation of a chip, and solve the problems that a liquid supply channel and a gas separation channel of an existing chip cold plate are mixed and the heat transfer capacity is low. A negative pressure environment is generated on one side of an evaporation waterproof breathable film, the pressure difference between the two sides of the film is increased, on one hand, mutual interference of traditional boiling heat exchange gas separation and liquid supply is avoided, on the other hand, the evaporation power and speed of the liquid are enhanced, the working efficiency of the cold plate is remarkably improved by utilizing a film evaporation mechanism, and the heat dissipation requirement that the heat flux density exceeds 1 kW/cm<2> can be met.

The invention relates to a synchronous automatic expectoration method. The method comprises the steps that S1, in sequence, a positive pressure phase is provided for air inflation, and a negative pressure phase is provided for air discharging; S2, in the positive pressure phase, a positive pressure air inflation phase ending sensitivity is used for triggering a switch to the negative pressure phase, and the positive pressure air inflation phase ending sensitivity is related to a cough force condition of a patient; S3, in the negative pressure phase, a negative pressure air discharging phase ending sensitivity is used for triggering a switch to the negative pressure phase or a cough intermittence phase, and the negative pressure air discharging phase ending sensitivity is related to the cough force condition of the patient; S4, the cough intermittence phase is provided and located between the negative pressure air discharging phase this time and the positive pressure air inflation phasenext time, and positive pressure supporting ventilation is provided at the cough intermittence phase multiple times. The invention further provides a synchronous automatic expectoration system. By applying the method and system, the treatment effect of sputum clear-away on the trachea when a patient wears the expectoration system can be improved.

The invention relates to a method for operating an injection-molding machine, the method comprising the steps: a) in a current injection-molding cycle, after an accepted-part reference injection-molding cycle learned in a learning phase: detecting a compound pressure change k1 relative to an accepted-part reference compound pressure pmasse,ref during at least part of an injection phase of the current injection-molding cycle by measuring a current compound pressure pmasse,act and comparing the current compound pressure pmasse,act with the accepted-part reference compound pressure pmasse,ref; b) determining a target mold internal pressure curve pwkz,soll(t) for a holding-pressure phase of the current injection-molding cycle, wherein for this purpose a mold internal pressure curve pwkz,ref (t) of the accepted-part reference injection-molding cycle is adjusted at least in dependence on the compound pressure change k1 detected in step a); and c) traveling the holding-pressure curve pmasse,Hld,act(t) of the current injection-molding cycle in such a way that an actual mold internal pressure curve pwkz,act(t) of the current injection-molding cycle runs at least more closely along the target mold internal pressure curve pwkz,soll(t) than a mold internal pressure curve pwkz,ref(t) that is unchanged in comparison with the accepted-part reference cycle.

The invention discloses a preparation method for preparing a large-size tantalum nitride block based on a domestic cubic press. The preparation process comprises the following steps: (1) grinding a tantalum nitride initial material; (2) carrying out vacuum treatment on the tantalum nitride powder obtained by grinding, and pre-pressing into a cylindrical block; (3) putting the pressed cylindrical block into a high-pressure synthesis block; (4) placing the high-pressure synthesis block in a synthesis cavity of a domestic cubic press for high-temperature and high-pressure phase change sintering; the sintering pressure is 2-6 GPa; the temperature is 600 to 1800 DEG C; the heat preservation time is 5-60 minutes; and (5) after sintering is completed, cooling and pressure relief are performed, and a tantalum nitride sintered body with the block diameter reaching 10 mm is taken out. The tantalum nitride block prepared by the method has the characteristics of uniform microstructure, few pores and better hardness and thermal stability than the traditional pure-phase tungsten carbide, and can be widely applied to the fields of mechanical manufacturing, geological drilling, grinding tool industry and the like.

The invention relates to the technical field of power generation equipment, in particular to a negative pressure phase change power generation system and a steam turbine power generation device. The system includes a heating superconducting heat pipe, a heat dissipation superconducting heat pipe, a heating room, a condensation room and a gas delivery pipeline; there is a height difference between the heating room and the condensation room and is connected through a gas delivery pipeline; the heat absorption end of the heating superconducting heat pipe and the The heat source is connected, the heat dissipation end of the heating superconducting heat pipe is connected with the heating plate, and the heating room is equipped with a thermal liquid medium. The heat dissipation end of the heat pipe is connected with a low-temperature heat source. The invention introduces the earth's natural energy into recombined phase-change power generation through heat pipes or superconductors, effectively replaces conventional energy sources such as coal and nuclear energy, maximizes the use of infinite natural resources, and improves the utilization rate of natural resources. The power generation system has simple equipment, low cost input, easy manufacture and no pollution.