31results about How to "Change number" patented technology

The invention relates to a computer-implemented method for limiting the number of concurrent requests in a database system. The method includes the following steps of arranging requests to be handled by the database system in at least one queue (10); defining a maximum value (SS) of concurrent requests corresponding to the at least one queue (10); monitoring at least one queue utilization parameter corresponding to the at least one queue (10) and calculating a performance value (PF) based on the at least one queue utilization parameter, adapting the maximum value (SS) of concurrent requests of the at least one queue dynamically based on the performance value (PF) in order to improve system performance and limiting the number of concurrent requests of the at least one queue (10) dynamically based on the dynamically adapted maximum value (SS).

The invention relates to a dual clutch transmission comprising two clutches (K1, K2) the input sides of which are connected to an input shaft (w_an) and the output sides of which are connected to one of two transmission input shafts (w_K1, w_K2) that are arranged coaxially relative each other; at least two countershafts (w_countershaft1, w_countershaft2) on which toothed gearwheels, configured asidler gears (01, 02, 03, 04, 05, 06, 07, 08), are rotatably received; toothed gearwheels that are non-rotatably arranged on the two transmission input shafts (w_K1, w_K2), that are configured as fixed gears (12, 13, 14, 15) and that engage at least partially with the idler gears (01, 02, 03, 04, 05, 06, 07); a plurality of coupling devices (A-B, C-D, E, E-F, F-G, G) for the non-rotatable connection of an idler gear (01, 02, 03, 04, 05, 06) to a countershaft (w_countershaft1, w_countershaft2) and respective pairs of power take-off gears (09, 10) mounted on the two countershafts (w_countershaft1, w_countershaft2), the pairs of power take-off gears being coupled to a toothed section of a power take-off shaft (w_ab); and at least one shift element (H) for coupling the two transmission input shafts (w_K1, w_K2), at least seven power-shifted forward gears (1, 2, 3, 4, 5, 6, 7) and at least one reverse gear (RA1, R1) being shiftable. The dual clutch transmission is characterized in that four gear planes (01-05; 02-13, 02-06; 03-06, 03-07; 04-07, 04-15, 04-08) are arranged in such a manner that at least one power-shifted winding path gear can be shifted via the shift element (H).

The invention discloses an IaaS-based method and system for time-sharing sharing of pre-purchased instances of uncertain demand services. The method includes: receiving load data obtained by real-time sampling during task operation, and the load data includes user demand arrival data , instance purchase data, and service-providing instance data; for each pre-purchased instance, judge whether there is waste in the instance according to the cost and instance usage rate in the two cases of time-sharing and reservation respectively: if it is judged to be If there is no waste, keep the reserved state of this instance; if it is determined that there is waste, according to the usage rate of each instance in the previous reservation validity period, get the instance time-sharing policy and apply it to the next reservation validity period. The invention can adaptively and dynamically make an instance time-sharing scheme in real time according to the arrival of demand in the load, and solves the problems of reserved instance resources and cost waste caused by too few demand visits.

The invention discloses a 2.4 / 5.8GHz dual-frequency MIMO (Multiple Input Multiple Output) omnidirectional antenna comprising an antenna cover consisting of an antenna bottom cover, an antenna sheath and a top cover. A metal bar longitudinally passes through the axial line of the antenna so as to tightly pull the antenna bottom cover, the antenna sheath and the top cover into a whole. The 2.4 / 5.8GHz dual-frequency MIMO omnidirectional antenna is characterized in that a plurality of microstrip plates with different frequencies in a shell are alternatively and uniformly distributed on the same one circumference, each microstrip plate consists of a medium substrate, a guide belt and a ground line, and the guide belt and the ground line are symmetrically and reversely arranged on two surfaces of the medium substrate, and are also respectively integrated with an inner conductor and an outer conductor of a coaxial connector. The invention breaks through the limitation of single frequency of the traditional omnidirectional antenna, and overcomes the shortages of high machining and debugging difficulties, high cost and the like; and the alternatively and uniformly distributed microstrip plates realizes the multiple frequencies coexistence; meanwhile, the invention exceeds the normal omnidirectional antenna in the aspects of bandwidth and gain. The invention has simple process and is beneficial to the batch production due to the plane PCB (Printed Circuit Board) structure.

The present invention relates to a kind of miniature needle array for medicine transmission, and features that the miniature needle in the array is non-planar solid miniature needle comprising a needle tip for piercing live animal skin, a needle body for increasing the pierced depth, and a base for stabilizing the array and preventing breaking and residue in the skin of miniature needle. The miniature needle array is changeable in the base number, the miniature needle number, the 3D structure of the needles, needle tip interval, needle tip height and the needle tip inclination for practical requirement. The miniature needle array is made through MEMS and polymer-MEMS combining process, in which only one mask is used for twice photo etching to form the needle tips and the needle bodies of the miniature needles. The present invention is used for vaccine and medicine transmission through micropores formed with the solidified hydrogel.

The invention provides a method for generating dozens of megampere pulse currents and a z-pinch direct drive source. The drive source comprises a primary pulse power source (thousands of fast discharge branch circuits are connected in parallel), a high-voltage transmission cable, a water medium electromagnetic induction chamber, a secondary MITL (Magnetically Insulated Transmission Line) and a z-pinch load, wherein the secondary MITL is formed by connecting multi-stage induction chambers in series; the z-pinch load is located on an axis; thousands of primary discharge branch circuits are located at the peripheries of the induction chambers and are divided into dozens of groups; the primary discharge branch circuits discharge rapidly to directly obtain an electric pulse with a leading edge of 100-200 ns, a voltage of 100-200 kV and a current of 30-50 kA. Currents of the thousands of branch circuits are transmitted and gathered on cable interfaces, which are uniformly distributed at the peripheries of the induction chambers, of dozens of I-shaped tri-plate transmission lines through the cable; the currents are gathered to the induction chambers for primary excitation through the tri-plate transmission lines; and the current gathering is realized through electromagnetic induction. Multi-stage induction chambers are connected in series to form an IVA (Induction Voltage Adder); the MITL is employed for a secondary stage of the IVA to realize voltage superimposition and power transmission; an ultra-high power electric pulse with a voltage of dozens of MV, a current of dozens of MA and a leading edge of 100-200 ns is generated on the Z-pinch load of the axis, and the requirement of a drive current of a Z-pinch ICF (Inertial Confinement Fusion) is met.

The invention discloses a method and device for reducing refrigerant flow noise in a multi-connected system, wherein the multi-connected system includes a first bypass valve, a second bypass valve and a refrigerant throttling valve. obtain the starting capacity of the indoor unit; and control the first bypass valve, the second bypass valve and the refrigerant throttle valve according to the running horsepower of the indoor unit or the starting capacity of the indoor unit. Thus, the first bypass valve, the second bypass valve, and the refrigerant throttling valve are controlled according to the number of indoor units running or the capacity of the indoor unit to change the number of refrigerant outlet flow paths, thereby promoting the flow of refrigerant and increasing the The uniformity of refrigerant flow reduces the noise of refrigerant flow in multi-connected systems.

The invention discloses a nanoscale loaded molybdenum sulfide (MoS 2 ) The preparation method of the catalyst. The invention includes the following steps: disperse / dissolve a certain amount of carrier, molybdenum source and sulfur source in deionized water, and stir after ultrasonic dispersion to obtain a suspension; add an appropriate amount of reducing agent and stir evenly; regulate the molybdenum source, sulfur source and The type of carrier; place the prepared solution or suspension in a closed stainless steel reaction kettle, control the reaction temperature at 120-200°C, and the reaction time is 3-36h; after the reaction is completed, cool, filter, wash, and dry to obtain Nanoscale supported MoS 2 catalyst. The synthesis method of the present invention has the advantages of mild conditions, simple operation and high yield, and the prepared nano-scale supported MoS 2 The catalyst has high active site exposure rate and high dispersion. The method of the present invention synthesizes nanoscale loaded MoS 2 The catalyst is used in the field of oil catalytic hydrogenation with extremely high catalytic hydrogenation activity.