34 results about "Transitional phase" patented technology

The invention provides an ascending aorta repair stent anchored by innominate artery, comprising an ascending aorta stent segment and an innominate artery stent segment, wherein an innominate artery portion of the stent is first released and a body portion is then released; the distal end opening of the body portion facing the distal end of the aortic arch lumen, and the body portion of the stentcovers the dissection at the primary rupture of the ascending aorta. When the release is completed, the main body terminates above the junction of the sinus canal. The longitudinal beam structure is made of a temperature-dependent shape memory metal material extending to the great curvature side of the aortic arch of the innominate artery and to the minor curvature side of the aortic arch, and isreleased so as to satisfy the individualized ascending aortic anatomical arc of different patients to abut against the aortic wall. The stent is anchored only according to the special anatomical shapeof the ascending aorta and the innominate artery and the memory metal longitudinal beam structure. Used in patients with type A aortic dissection in the acute phase of surgical contraindication whenwaiting for the transitional phase of surgery for patients with high surgical risk of acute type A aortic dissection to provide follow-up surgical treatment opportunities.

The invention discloses a single-phase grounding fault phase selection and transition resistance measurement method, which predicts the size of the single-phase grounding fault current according to the neutral point voltage before and after the power grid fault, and realizes it by comparing the phases of the grounding current and the three-phase phase voltage of the power grid Fault phase selection, the transition resistance is calculated according to the amplitude of single-phase ground fault current and fault phase voltage. A single-phase ground fault phase selection and transition resistance measurement method proposed by the present invention can predict the single-phase ground fault current value, and realize fault phase selection by comparing the phase of the ground current and the voltage of each phase. Compared with the traditional phase selection based on phase voltage amplitude characteristics, the accuracy of phase selection is higher, and the transition resistance can be measured after the fault phase is determined. The method is not affected by grid asymmetry and load changes, and improves the operation safety of the grid.

An electronic system for a battery designed to supply electrical power to an application, such as in an aircraft, that includes a main power supply, comprises a charging circuit (30) with a charger (K3C), a first battery discharging circuit (20) in parallel with the charging circuit, a component ensuring continuity of discharge (D3) and an electronic control unit adapted to control opening and closing of the discharge switch (K2) and adapted to control said charger (K3C). The control unit keeps the battery charged as long as it is not being called on to discharge and interrupts battery charging and sets the discharge switch (K2) to the closed position when a call for power is detected from the application, the component ensuring continuity of discharge (D3) allowing passage of a discharge current during a transitional phase of closing of the discharge switch (K2).

A digital level control circuit, such as an Automatic Gain Control, includes a plurality of digitally selectable signal levels with transitions between levels gradually varied to avoid signal output level discontinuities. An up / down counter may be used to incrementally stepwise transition an output signal between the digitally selectable output levels. Stepwise application of a control signal to the appropriate switching elements (e.g., FETs) forming an attenuator circuit may be implemented to moderate a switching time of the switching elements to provide a more gradual transition between element operating states. A deglitch circuit may be employed to latch the switching elements to achieve the desired state at the end of a desired switching transition period.

A method of delivering a multi-phase fluid injection to a patient via a fluid injector comprising two or more syringes includes injecting a first fluid of the fluid injection from at least a first syringe at a first predetermined flow rate, wherein the first fluid has a first viscosity; injecting an initial portion of a second fluid from at least a second syringe at an intermediate flow rate different than a second predetermined flow rate for a specified time, the second fluid having a second viscosity different from the first viscosity; and injecting a remaining portion of the second fluid ofthe fluid injection at a flow rate at the second predetermined flow rate. A fluid injector system configured for delivering a multi-phase fluid injection is disclosed.

The invention provides a method for preparing flaky alumina powder, belonging to the technical field of powder particle size and shape control. The technical process comprises the following steps: by using industrial aluminum hydroxide or transitional-phase alumina powder as a raw material, adding a crystal seed and a crystal grain shape control agent into the raw material powder, uniformly mixing the raw material powder, and pressing into a billet; and carrying out high-temperature calcination on the billet in an atmosphere containing hydrogen halide and shape control component, crushing the calcination billet into powder, carrying out secondary forming, and carrying out low-temperature calcination in an atmosphere containing higher-concentration hydrogen halide, thereby obtaining the flaky alumina powder, of which the thickness is less than 0.2 mu m, the average radius-thickness ratio is greater than 50 and the alpha-Al2O3 content is 100%. The method has the advantages of simple preparation technique and low manufacturing cost.

The invention discloses a consequent catching and overturning type fruit transition device which comprises a detection workbench and a discharge workbench, wherein the detection workbench and the discharge workbench are connected end to end; and the detection workbench adopts a roller to convey fruits, the discharge workbench adopts a fruit support provided with a positioning spring leaf and a friction wheel to convey fruits, and the rotation directions of a detection conveying chain and a discharge conveying chain are opposite. When entering a fruit transition area, the roller and the fruit support convey fruits from the top down along with the conveying chains respectively along chain wheels, the fruits leave the roller under the action of inertia and gravity and fall down along a fruit guide concave under the action of buffering limiting of a brush roller, and the fruit support rotates gradually under the action of the positioning spring leaf of the fruit support and a limiting arc board of the fruit support, faces towards the fruits falling down, takes the chance to catch the fruits, and rotates reversely under the action of friction of an overturning arc-shaped friction strip of the fruit support to return to a stable conveying state. The device takes the chance to catch fruits, is stable in transition, does not cause mechanical collision and injuries to fruits, is accurate in transitional phase position, and can be widely applied to grading transition of apples, oranges and other torispherical fruits.