30results about How to "Short transition" patented technology

A photonic crystal guided propagation structure. The structure includes a guide portion Wn, n being a positive real number or zero number, having a first configuration of rows of patterns, and a guide portion Wm, m being a real number, m>n, having a second configuration of rows of patterns, and a transition zone of distance D located between guide portion Wn and guide portion Wm, in which patterns aligned with at least one row of patterns in the first configuration decrease in size over distance D to allow progressive passing from the first configuration of rows of patterns to the second configuration of rows of patterns. The structures can be applied to the area of integrated optics (semiconductor lasers, laser modulators, filters, multiplexors, etc.).

Provided is a dye-sensitized solar cell including a flexible electrode. The dye-sensitized solar cell includes: first and second electrodes facing each other, and an electrolyte layer interposed between the first and second electrodes, wherein the first electrode comprises a structure formed of conductive fibers, a nano-particle semiconductor oxide layer formed on a surface of the structure of the conductive fibers, and dye molecules adsorbed in the nano-particle semiconductor oxide layer.

The invention discloses an engine exhaust manifold assembly. The front end mouth portion of each exhaust manifold is extended and is mounted at intervals on an air inlet flange, a three-way catalyst is cylindrical, the back end of each exhaust manifold is gathered together and connected with the front end of the three-way catalyst through a horn-shaped transition tube, the inner diameter of the horn-shaped transition tube is gradually increased from the front end to the back end, the air inlet flange is a casting part and is sleeved at the back end of the three-way catalyst, an included angle alpha of 20-80 degrees is formed between the front end face and the back end face of the air inlet flange, the inner diameter of the air inlet flange is gradually decreased from the front end to the back end, the back end of the three-way catalyst is inserted into the front end mouth portion of the air inlet flange and is welded with the air inlet flange, and the back end mouth portion of the air inlet flange extends outwards to form a flange mounting plate. The engine exhaust manifold assembly has the advantages of simple structure, low air discharging back pressure, good engine dynamic property, small heat loss, high cold starting property and the like, and requirements of national five emission standards can be met.

A vehicle control device includes a map database and at least one electronic control unit. The electronic control unit is configured to calculate a reference arrival position based on a target time or a target distance. The at least one electronic control unit is configured to determine, according to the map information or the external situation at the reference arrival position, as a target arrival position, a position where the vehicle arrives on the potential route in a time different from the target time or over a distance different from the target distance. The at least one electronic control unit is configured to calculate a transition route from the road position to the target arrival position, and generate the target route by connecting the transition route and the potential route following the target arrival position.

The invention discloses an asynchronous motor step-down energy saver and an energy saving control method thereof. The asynchronous motor step-down energy saver consists of a voltage regulating device, a detection circuit, a computation module, a controller, and a trigger circuit, wherein an input end of the voltage regulating device is connected with an external power grid, and an output end of the voltage regulating device is directly connected with a stator end of a motor; the detection circuit outputs signals to the computation module; the computation module computes the optimal voltage, and inputs the optimal voltage and an actual voltage of a stator into the controller; and the controller controls actions of the voltage regulating device by virtue of the trigger circuit so as to control the input voltage of the stator end of the motor. The asynchronous motor step-down energy saver has the following technical effects: 1, the asynchronous motor step-down energy saver has relatively good control quality, and good anti-disturbance capability, and can achieve high-speed high-precision control especially in a severe environment; and 2, the asynchronous motor step-down energy saver adopts an auto-disturbance rejection control technology, has the characteristics of small overshoot and short transitional process, can adapt to changes of an object model and a surrounding environment in a very large range, does not influence the control quality of the controller, and has very good robustness.

The invention discloses an energy-saving type hydraulic escalator which comprises a controller, a descending escalator part, an ascending escalator part, a first variable displacement motor, a second variable displacement motor and a reversing valve; the first variable displacement motor and the second variable displacement motor are each provided with a pump working condition and a motor working condition; the first variable displacement motor, the second variable displacement motor and the reversing valve form a hydraulic circuit; an output shaft of the first variable displacement motor is connected with a transmission shaft of the descending escalator part; an output shaft of the second variable displacement motor is connected with a transmission shaft of the ascending escalator part; when the descending speed of the descending escalator part is greater than a preset threshold, the reversing valve is positioned in a first station, an oil inlet of the reversing valve communicates with a pump working condition oil port of the first variable displacement motor, and an oil return port of the reversing valve communicates with a motor working condition oil port of the first variable displacement motor; and when the descending speed of the descending escalator part is less than a preset threshold, the reversing valve is positioned in a second station, the oil inlet of the reversing valve communicates with a motor working condition oil port of the first variable displacement motor, and the oil return port communicates with a pump working condition oil port of the first variable displacement motor. The gravitational potential energy of the descending escalator part is converted to pressure energy used for driving the ascending escalator part to operate, an energy conversion link is brief, the conversion efficiency is high, no additional space is occupied, and the cost is low.

A room temperature and low pressure test method for the sealing performance of polyethylene valves. On the premise of confirming that the valve end face is reliably sealed and the air circuit of the test bench has no leakage, the indoor air is used as the test medium, and the closed-loop control system of the test bench is used to automatically pressurize the valve test chamber and standard cylinder to the test standard pressure. Use the temperature sensor and differential pressure sensor to simultaneously detect the temperature of the valve test chamber and the test gas in the standard cylinder and the pressure difference between the two, obtain all the two-dimensional data during the pressurization test period or the period before the leakage alarm, and send it to the single-chip computer system Perform cross-correlation analysis. According to the sufficient and necessary condition of no leakage: any point on the fitting curve of the temperature difference and pressure difference of the medium on the same time axis has the same change gradient, and the temperature and pressure values ​​at any time have a single proportional relationship. The pressure drop gradient value of the valve gives the judgment of the sealing performance of the valve. This method does not require a constant temperature environment, and has the characteristics of high resolution, rapidity and high efficiency.

The invention discloses a construction method conversion construction method for super-long-span tunnels in the surrounding rock section of level V to level IV. Controlled excavation is adopted to keep the same elevation of the arching line, and the double side wall pilot pit method of the surrounding rock is used as the leading and leading method in the construction of the transition section. The temporary middle wall of the left pilot pit and the temporary middle wall of the right pilot pit on both sides of the rear guide move to the middle of the tunnel at the same time, until the temporary middle wall of the left pilot pit and the temporary middle wall of the right pilot pit touch, and the temporary inverted arch Lock-foot anchors are applied on both sides; then the temporary middle wall of the right pilot pit is removed, and the temporary middle wall of the left pilot pit is retained as the middle temporary middle wall of the CRD method. This method transitions from the double-side-wall pilot-pit method to the CRD method in the horizontal direction, avoiding the time interval between construction method conversions, and reducing the disturbance of the surrounding rock caused by the removal of the temporary support of the double-side-wall pilot-pit method in the later stage, thus speeding up the construction. , save the construction period, avoid idle work, and improve the economic benefits of tunnel construction.

The present invention provides a delivery system for unmanned aerial vehicles, which includes a fixing component for suspending and fixing the unmanned aerial vehicle to be launched. The unmanned aerial vehicle includes a nose and two wings, wherein the suspension and fixing means: The fixing components are respectively connected with the nose and the two wings to form a three-point connection, and the nose is facing the ground, and the body is in a predetermined launching posture. Since the fixing assembly of the present invention is connected at three points with the unmanned aerial vehicle to be released, and the unmanned aerial vehicle is in the predetermined launching posture when it is fixed, it is easier to make it be in this posture when it is released, reducing the number of times to adjust the posture. It is beneficial for the aircraft to gain speed after release, helps the aircraft attitude to level off quickly, reduces the transition process, and ensures the safety of the aircraft. In addition, the structure of the invention is simple to realize, has high safety and reliability, and is convenient for engineering application.

The invention discloses a fast self-learning improved ADRC control method for a nonlinear system, which includes the following steps: Step 1: Create an ADRC: the ADRC includes a tracking differentiator (TD), an expanded state Four parts of observer (ESO), nonlinear error feedback (NLSEF) and disturbance compensation; step 11) establish tracking differentiator (TD) control model; step 12) establish extended state observer (ESO) control model; step 13) establish Nonlinear error feedback (NLSEF) control model; Step 14) Establish a disturbance compensation control model; Step 2: Create a self-learning active disturbance rejection controller (SADRC): apply the self-learning method to the nonlinear error feedback (NLSEF) control model , establish a self-learning nonlinear ADRC control system model; Step 3: Create a fast self-learning ADRC (FSADRC): use the method of adding momentum to design an adaptive mechanism for learning rate, and establish a dynamic adaptive Fast self-learning model with learning rate.

The invention discloses a networking control method of energy storage inverters based on quasi real-time synchronous signals, and relates to the field of micro-grid operational control. The networking control method includes the steps that the S1, whether a main energy storage inverter is in grid connection is judged, if yes, the S2 is carried out, and if not, the S3 is carried out; the S2, a master controller collects grid connection voltage and current signals, processes the voltage and current signals, broadcasts the processed voltage signals to a slave controller and meanwhile the slave controller collects grid connection current signals from the slave controller and carries out preprocessing; the S3, the master controller generates grid connection voltage signals according to known conditions and broadcasts the grid connection voltage signals to the slave controller, and the master controller and the slave controller collect the grid connection current signals of the corresponding energy storage inverter and carry out preprocessing respectively; the S4, the master controller carries out computation on the processed voltage and current signals to obtain control signals so as to control the main energy storage inverter to work; the slave controller carries out computation on the processed grid connection current signals and voltage signals broadcast from the master controller to obtain control signals to control a slave energy storage inverters to work.