Abstract: Disclosed are a polyethylene glycol conjugate drug, and a preparation method therefor and the use thereof. Specifically, the present invention relates to a polyethylene glycol conjugate drug represented by formula A or a pharmaceutically acceptable salt thereof, a method for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, an intermediate for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, and the use of the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof in the preparation of a drug.

Abstract: A system, method and computer-readable medium for testing a service-based application identifies a set of use cases for the service-based application. Each use case in the set is mapped to a test case to generate a first set of test cases. Each of the test cases is refined to generate an updated set of test cases and the updated set of test cases is executed.

Abstract: A first integrated cloud is identified in a self-driven testing platform. The interoperability of the first integrated cloud with a plurality of other integrated clouds is tested. A service chain to verify a service chain path connectivity between the first integrated cloud and the plurality of other integrated clouds is created. Performance of the service chain is determined as is whether the service chain performance meets a benchmark requirement. If the service chain performance does not meet the benchmark requirement, service chain inventory data and adjacent neighbor connection information is retrieved. Real time network configuration data from the first integrated cloud and the plurality of other integrated clouds is retrieved and any mismatched network configuration data is compared and corrected.

Abstract: A system, method and computer-readable medium for testing a service-based application identifies a set of use cases for the service-based application. Each use case in the set is mapped to a test case to generate a first set of test cases. Each of the test cases is refined to generate an updated set of test cases and the updated set of test cases is executed.

Abstract: A system, method and computer-readable medium for testing a service-based application identifies a set of use cases for the service-based application. Each use case in the set is mapped to a test case to generate a first set of test cases. Each of the test cases is refined to generate an updated set of test cases and the updated set of test cases is executed.

Abstract: A system, method and computer-readable medium for testing a service-based application identifies a set of use cases for the service-based application. Each use case in the set is mapped to a test case to generate a first set of test cases. Each of the test cases is refined to generate an updated set of test cases and the updated set of test cases is executed.

Abstract: A first integrated cloud is identified in a self-driven testing platform. The interoperability of the first integrated cloud with a plurality of other integrated clouds is tested. A service chain to verify a service chain path connectivity between the first integrated cloud and the plurality of other integrated clouds is created. Performance of the service chain is determined as is whether the service chain performance meets a benchmark requirement. If the service chain performance does not meet the benchmark requirement, service chain inventory data and adjacent neighbor connection information is retrieved. Real time network configuration data from the first integrated cloud and the plurality of other integrated clouds is retrieved and any mismatched network configuration data is compared and corrected.

Abstract: A driving and adjusting device of a passive shuttle-type shut-off valve is provided. The problems of a big valve body structure size, a non-random angle installment, a single drive mode, low stability and reliability, a high temperature and poisonous material entering into the driving and adjusting device and unadjustable on-off speed and low volume in the prior device are solved. A main body (33) is connected with an upstream pipe (1) and a downstream pipe (3). A pressure port (2) on the upstream pipe (1) is connected with the driving device. A double acting cylinder (34) is provided in a valve sleeve (21). The left and right chambers of the double acting cylinder are connected with the valve clack (24). The driving device is composed of a regulating valve, a directional valve, a check valve, a boost-insulation valve and an accumulator (18). It can select the drive mode and adjust the on-off speed and the flow volume of the valve.

Abstract: A driving and adjusting device of a passive shuttle-type shut-off valve is provided. The problems of a big valve body structure size, a non-random angle installment, a single drive mode, low stability and reliability, a high temperature and poisonous material entering into the driving and adjusting device and unadjustable on-off speed and low volume in the prior device are solved. A main body (33) is connected with an upstream pipe (1) and a downstream pipe (3). A pressure port (2) on the upstream pipe (1) is connected with the driving device. A double acting cylinder (34) is provided in a valve sleeve (21). The left and right chambers of the double acting cylinder are connected with the valve clack (24). The driving device is composed of a regulating valve, a directional valve, a check valve, a boost-insulation valve and an accumulator (18). It can select the drive mode and adjust the on-off speed and the flow volume of the valve.

Abstract: The present invention relates to an adjustable differential flow shuttle valve control system. The adjustable differential flow shuttle valve control system includes a direction control valve and a flow-rate control valve provided in medium inflow and outflow circuits of a working cylinder. The medium inflow and outflow circuits of the working cylinder (1) are connected with a two-position or three-position four-way valve (2). The medium inflow and outflow circuits of the working cylinder are provided with an adjustable differential flow shuttle valve (3).

Abstract: A protection device which is capable of cutting off a pipeline when the pipeline leaks due to the rupture of the pipe self-operatedly closes the pipeline using fluid kinetic energy. A control rod converts linear movement of a piston into the opening and closing movement of a main valve core. The piston separates a hydraulic cylinder chamber into a first chamber and a second chamber. A restoring spring in the first chamber restores a control piston to an initial position. A control valve in the second chamber controls discharge of fluid from the second chamber. A flow state-sensing device introduces fluid in the fluid pipe to the second chamber when the fluid pipe ruptures and leaks.

Abstract: A fluid control valve for a pipeline pig includes a main valve and a mechanism for operating the main valve. The main valve comprises a valve body communicated to a fluid pipe, a main valve core movably disposed in the inner chamber of the valve body, and a main valve stem connected to the main valve core. The operating mechanism includes a hydrocylinder, which comprises a piston disposed in the cylinder, and a piston rod connected to the piston. The piston rod is transmissibly connected with the main valve stem so as to drive the main valve core by the main valve stem. A valve device includes a pilot valve, positioned in the pipeline which communicates the fluid pipe with the hydrocylinder, and an operator for controlling the actuation of the pilot valve so as to enable the piston to move reciprocally by the pressure of fluid in the fluid pipe.

Abstract: A protection device which is capable of cutting off a pipeline when the pipeline leaks due to the rupture of the pipe, self-operatedly closes the pipeline using fluid kinetic energy. A control rod converts linear movement of a piston into the opening and closing movement of a main valve core. The piston separates a hydraulic cylinder chamber into a first chamber and a second chamber. A restoring spring in the first chamber restores a control piston to an initial position. A control valve in the second chamber controls discharge of fluid from the second chamber. A flow state-sensing device introduces fluid in the fluid pipe to the second chamber when the fluid pipe ruptures and leaks.

Abstract: The present invention discloses a protection device which is capable of cutting off the pipeline when the pipeline leaks due to the rupture of the pipe, and is aimed to achieve the object of self-operatedly closing the pipeline using fluid kinetic energy when a pipeline ruptures and leaks. The protection device comprises a main valve (1) and a control device for the main valve. The main valve (1) comprises a valve body (2) communicating with a fluid pipe (3), a main valve core provided in the valve body and a main valve stem (4) connected with the main valve core.