Abstract: A method for constructing a large-span station by two-wing open type semi-covered excavation and semi-reverse construction, is divided into three stages of excavation. First, excavate a first-stage inner small foundation pit, then excavate a second-stage annular foundation pit within the first-stage retaining piles and outside the range of the first-stage inner small foundation pit, and finally excavate a third-stage semi-covered excavation foundation pit below the first-stage inner small foundation pit and the second-stage annular foundation pit. By setting graded retaining piles, middle upright post piles, middle top plates, local waist beams and local concrete supports in the soil-rock combination strata, so that the force transfer between the foundation pit enclosure and the station main body structures and the underlying rock layer is clear and reliable, and a stable frame structure is achieved.

Abstract: The disclosure discloses a measuring device for dynamic characteristics of pressure sensitive paint, including a PSP sample wafer, a dynamic pressure sensor, an oscilloscope, a light source, a photomultiplier tube, a bandpass filter, a loudspeaker, a power amplifier, and a signal generator. The disclosure further discloses a measuring method for dynamic characteristics of pressure sensitive paint. The disclosure has the following beneficial effects: by using the measuring device disclosed by the present disclosure, the continuous sinusoidal pressure wave with any frequency can be generated, and has the frequency precision that does not exceed 0.01 Hz, an optical path is not shielded, high stability is achieved, and the amplitude and phase characteristics of the pressure frequency of the PSP can be precisely captured.

Abstract: A method for constructing a large-span station by two-wing open type semi-covered excavation and semi-reverse construction, is divided into three stages of excavation. First, excavate a first-stage inner small foundation pit, then excavate a second-stage annular foundation pit within the first-stage retaining piles and outside the range of the first-stage inner small foundation pit, and finally excavate a third-stage semi-covered excavation foundation pit below the first-stage inner small foundation pit and the second-stage annular foundation pit. By setting graded retaining piles, middle upright post piles, middle top plates, local waist beams and local concrete supports in the soil-rock combination strata, so that the force transfer between the foundation pit enclosure and the station main body structures and the underlying rock layer is clear and reliable, and a stable frame structure is achieved.

Abstract: A method and system for increasing a page loading rate, the method comprising: a Content Delivery Network receiving a page framework request sent by a browser, and launching a page framework request to a server; the server rendering a page framework on the basis of the page framework request, and sending the page framework to the browser by the Content Delivery Network; the browser parsing the page framework to obtain a page module identifier, and launching a page module request including the page module identifier to the server by the Content Delivery Network; the server rendering a page module on the basis of the page framework module request, and sending the page module to the Content Delivery Network; and the Content Delivery Network populating the page module into the page framework to form a page on the basis of the page module identifier, and sending the page to the browser.

Abstract: Disclosed is a hybrid refrigeration full fresh air-conditioning unit, which achieves multistage cooling by means of the combination of a surface cooler cooling system, a refrigerant air-conditioning system and a direct expansion type air-conditioning system. The unit has an outdoor side mainly for cool water supply to a cooler (115) and conducting heat dissipation on a condenser (212) and an indoor side mainly for conducting multistage treatment of air entering a room. The indoor side and the outdoor side are connected to form a whole and are isolated via a panel. The refrigerant air-conditioning system cooperates with one or two of the other systems. Each system can independently operate or simultaneously operate together so that temperature and humidity control for all-weather can be provided, and their operation can be conducted in the most economical and environmental friendly manner under different temperature and humidity condition.

Abstract: A method and system for increasing a page loading rate, the method comprising: a Content Delivery Network receiving a page framework request sent by a browser, and launching a page framework request to a server; the server rendering a page framework on the basis of the page framework request, and sending the page framework to the browser by the Content Delivery Network; the browser parsing the page framework to obtain a page module identifier, and launching a page module request including the page module identifier to the server by the Content Delivery Network; the server rendering a page module on the basis of the page framework module request, and sending the page module to the Content Delivery Network; and the Content Delivery Network populating the page module into the page framework to form a page on the basis of the page module identifier, and sending the page to the browser.

Abstract: Disclosed is a hybrid refrigeration full fresh air-conditioning unit, which achieves multistage cooling by means of the combination of a surface cooler cooling system, a refrigerant air-conditioning system and a direct expansion type air-conditioning system. The unit has an outdoor side mainly for cool water supply to a cooler (115) and conducting heat dissipation on a condenser (212) and an indoor side mainly for conducting multistage treatment of air entering a room. The indoor side and the outdoor side are connected to form a whole and are isolated via a panel. The refrigerant air-conditioning system cooperates with one or two of the other systems. Each system can independently operate or simultaneously operate together so that temperature and humidity control for all-weather can be provided, and their operation can be conducted in the most economical and environmental friendly manner under different temperature and humidity condition.

Abstract: While an engine (10, 10A, 10B, 10C, 10D, 10E) is operating, a control system (22) processes data for certain engine operating parameters to calculate a quantity of exhaust gas needed to satisfy an exhaust gas recirculation requirement. If a primary EGR control loop (34) alone can satisfy the calculated quantity of exhaust gas, a secondary EGR control loop (36) is closed while the primary EGR control loop is controlled to satisfy the calculated quantity. When the processing determines that the primary EGR control loop alone cannot satisfy the calculated quantity, the secondary EGR control loop is open concurrently with the primary EGR control loop and both the primary EGR loop and the secondary EGR loop are controlled to cause the combined flow of exhaust gas through the primary EGR control loop and flow of exhaust gas through the secondary EGR control loop to satisfy the calculated quantity.

Abstract: While an engine (10, 10A, 10B, 10C, 10D, 10E) is operating, a control system (22) processes data for certain engine operating parameters to calculate a quantity of exhaust gas needed to satisfy an exhaust gas recirculation requirement. If a primary EGR control loop (34) alone can satisfy the calculated quantity of exhaust gas, a secondary EGR control loop (36) is closed while the primary EGR control loop is controlled to satisfy the calculated quantity. When the processing determines that the primary EGR control loop alone cannot satisfy the calculated quantity, the secondary EGR control loop is open concurrently with the primary EGR control loop and both the primary EGR loop and the secondary EGR loop are controlled to cause the combined flow of exhaust gas through the primary EGR control loop and flow of exhaust gas through the secondary EGR control loop to satisfy the calculated quantity.

Abstract: A flow including air and exhaust gas is received at a boost pressure at a plurality of cylinders (103). Exhaust gas is expelled from a first subset of the plurality of cylinders (103) into a first divided exhaust manifold (103). Exhaust gas is expelled from a second subset of the plurality of cylinders into a second divided exhaust manifold (111). The first subset and the second subset are different. An exhaust gas recirculation (EGR) system receives at an EGR inlet (131 or 201 and 211) a part of the exhaust gas from the first divided exhaust manifold (109) and a part of the exhaust gas from the second divided exhaust manifold (111).

Abstract: A controller for controlling a needle valve of a spring closing type fuel injector includes a fluid assist selectively exerting a force on the needle valve, the force acting in cooperation with a bias exerted by a return spring on the needle valve to effect a relatively low valve opening pressure of the needle valve and relatively very high valve closing pressure. A spring closing type fuel injector and a method for controlling a needle valve of a spring closing type fuel injector are further included.

Abstract: A valve actuator for controlling a valve between an open and a closed disposition includes couplings to a source of fluid under pressure and a reservoir at substantially ambient pressure. A control fluidly coupled to the source of fluid under pressure and to the reservoir for controlling presenting fluid at selected pressure to affect a reciprocatable component, the reciprocatable component being operably coupled to the valve for shifting the valve between the open and the closed disposition. And, positively, hydraulically shifting the valve between the open and the closed disposition. A method of valve actuation is also included.

Abstract: An actuator rail assembly for conveying an actuating fluid under pressure to at least one fuel injector includes an elongate fluid passageway (18) being defined in a rail (12). A fluid inlet port (31) is in fluid communication with the fluid passageway (18), the inlet port being fluidly couplable to a source of actuating fluid under pressure. A respective fluid outlet port is associated with each respective fuel injector and being fluidly couplable thereto for conveying actuating fluid to the respective fuel injector and at least one fluid cavity (16) having at least one throttling orifice (14), the orifice effecting fluid communication between the fluid cavity (16) and the fluid passageway (18). An acoustic wave attenuator and a method of attenuation are also included.

Abstract: An actuator rail assembly for conveying an actuating fluid under pressure to at least one fuel injector, include an elongate fluid passageway being defined in a rail. A fluid inlet port is in fluid communication with the fluid passageway, the inlet port being fluidly couplable to a source of actuating fluid under pressure. A respective fluid outlet port is associated with each respective fuel injector and being fluidly couplable thereto for conveying actuating fluid to the respective fuel injector; and at least one fluid cavity having at least one throttling orifice, the orifice effecting fluid communication between the fluid cavity and the fluid passageway. An acoustic wave attenuator and a method of attenuation are also included.

Abstract: The data link layer maintenance system executes in the Q.921 protocol server of the serving ISDN Access Node and maintains the data link layer active in the ISDN-based Terminal Equipment and the Q.921 protocol server of the serving ISDN Access Node during the execution of a software reset process. This is accomplished by the Q.921 protocol server of the serving ISDN Access Node software storing the data communications connection data in a persistent table that survives the software reset operation. A predetermined set of control signals is then exchanged between the Q.921 protocol server of the serving ISDN Access Node and the ISDN-based Terminal Equipment in response to the initiation of a software reset process to execute standard signaling processes of the LAP-D protocol to force the Terminal Equipment and the Q.921 protocol server of the serving ISDN Access Node into a predetermined stable state.

Abstract: A unit fuel injector, the injector internally preparing fuel during an injection event at a pressure sufficient for injection by means of an intensifier driven by a pressurized non-fuel actuating fluid selectively ported to the intensifier, includes a selectively actuatable controller interposed in a fuel passage, the fuel passage effecting fluid communication between an intensifier fuel chamber and a needle valve, the controller being shiftable between an open and a closed disposition for selectively opening and closing the fuel passage during the injection event A control apparatus and a method of injection timing control are further included.

Abstract: A hydraulically actuated, intensified fuel injector includes a controller achieving a desired injection control strategy by selectively independently porting actuating fluid to and venting actuating fluid from an intensifier piston to control the compressive stroke of the intensifier piston and selectively independently porting actuating fluid to and venting actuating fluid from a needle valve to control the opening and closing of the needle valve during the injection event. A method of control is further included.

Abstract: A valve actuator for controlling a valve between an open and a closed disposition includes couplings to a source of fluid under pressure and a reservoir at substantially ambient pressure. A control fluidly coupled to the source of fluid under pressure and to the reservoir for controlling presenting fluid at selected pressure to affect a reciprocatable component, the reciprocatable component being operably coupled to the valve for shifting the valve between the open and the closed disposition. And, positively, hydraulically shifting the valve between the open and the closed disposition. A method of valve actuation is also included.

Abstract: In an internal combustion engine, a fixed engine valve timing profile may be combined with a variable profile produced by a valve actuator coupled to one or more engine valves. By controlling one or more engine valves independent of the fixed timing profile, engine gas flow may be more flexibly regulated, thereby optimizing engine performance under a wide variety of operating conditions. In one embodiment, enhanced internal exhaust gas recirculation (EGR) may be achieved. A turbocharger may be used, along with the control provided by the valve actuator, to further control engine gas flow. In this manner, the present invention facilitates greater control of engine gas flow with minimal cost and complexity.

Abstract: An actuator rail assembly for conveying an actuating fluid under pressure to at least one fuel injector includes an elongate fluid passageway (18) being defined in a rail (12). A fluid inlet port (31) is in fluid communication with the fluid passageway (18), the inlet port being fluidly couplable to a source of actuating fluid under pressure. A respective fluid outlet port is associated with each respective fuel injector and being fluidly couplable thereto for conveying actuating fluid to the respective fuel injector and at least one fluid cavity (16) having at least one throttling orifice (14), the orifice effecting fluid communication between the fluid cavity (16) and the fluid passageway (18). An acoustic wave attenuator and a method of attenuation are also included.