Abstract: A method and device for issuing an identity certificate to a blockchain node in a blockchain network includes issuing a first identity certificate to a first terminal. a second identity certificate issuance request that is from the first terminal and that is made by using the first identity certificate is received and a second identity certificate is issued to the first terminal, which forwards the second identity certificate to a second terminal. A third identity certificate issuance request that is from the second terminal and that is made by using the second identity certificate is received and a third identity certificate is issued to the second terminal, which forwards the third identity certificate to a third terminal.

Abstract: A radiation irradiation system including a radiation generating device and a carrying table, a beam generated by the radiation generating device irradiates an irradiated object on the carrying table, the radiation irradiation system further includes a carrying table positioning device, the carrying table is supported by the carrying table positioning device, the carrying table positioning device includes a positioning mechanism, the positioning mechanism includes a linear axis, the carrying table positioning device may horizontally move along the linear axis, and an extending direction of the linear axis is parallel to an irradiation direction of beams generated by the radiation generating device. In the positioning process of the carrying table, most of the carrying table positioning device is located in the space between the linear axis and the beam outlet, the radioactivity and life-span shortening caused by the radiation of the various components of the carrying table positioning device are reduced.

Abstract: A calibration method, a calibration device and a calibration system of a laser positioning system are provided. The calibration method includes: arranging calibration devices in a first chamber and a second chamber, respectively, each calibration device including a calibration die, and the relative position between the calibration die of the first chamber and a predetermined center point of the first chamber being the same as the relative position between the calibration die of the second chamber and a predetermined center point of the second chamber; and comparing the position of a first positioning mark on the calibration die of the first chamber and the position of a second positioning mark on the calibration die of the second chamber. The technical solution provided can avoid deviation of an irradiation position to a patient from a correct treatment position, and reduce or avoid unnecessary radiation dose to the patient.

Abstract: A radiation exposure system includes a radiation generation device, a control device, a simulation positioning chamber, an irradiation chamber, as well as same first and second placement platforms that are respectively arranged in the simulation positioning chamber and the irradiation chamber, and same first and second placement platforms positioning devices that support the first and second placement platforms. An irradiated object has the same position on the first and second placement platforms. A simulated positioning position of the first placement platform is determined in the simulation positioning chamber by means of the first placement platform positioning device. The second placement platform positioning device is controlled by the irradiation indoor control device to move the second placement platform to the simulated positioning position and determine the irradiation position of the second placement platform.

Abstract: A method and device for issuing an identity certificate to a blockchain node in a blockchain network includes issuing a first identity certificate to a first terminal. a second identity certificate issuance request that is from the first terminal and that is made by using the first identity certificate is received and a second identity certificate is issued to the first terminal, which forwards the second identity certificate to a second terminal. A third identity certificate issuance request that is from the second terminal and that is made by using the second identity certificate is received and a third identity certificate is issued to the second terminal, which forwards the third identity certificate to a third terminal.

Abstract: A neutron capture therapy system, which can reduce secondary radiation and radiation damage caused by the action of recoil neutrons generated in the process of generating neutron beams by a beam transmission portion and a neutron beam generation portion. The neutron capture therapy system comprises an accelerator, the beam transmission portion, and the neutron beam generation portion; the accelerator accelerates charged particles to generate charged particle beams; the beam transmission portion transmits the charged particle beams generated by the accelerator to the neutron beam generation portion; the neutron beam generation portion generates neutron beams for treatment; and the neutron capture therapy system comprises a beam transmission shielding component for the beam transmission portion.

Abstract: An identity certificate may be issued to a blockchain node. The issuance may include issuing a first identity certificate to a first terminal and receiving a second identity certificate issuance request that is from the first terminal. A second identity certificate may be issued to the first terminal, and a third identity certificate issuance request is received from the second terminal. A third identity certificate is issued to the second terminal, so that the second terminal forwards the third identity certificate to the third terminal.

Abstract: A neutron capture therapy system, including an accelerator for generating a charged particle beam, a transmission device for transmitting the charged particle beam, a neutron generation part for generating a neutron beam by reacting with the charged particle beam, a beam shaping body for performing spectrum adjustment on the neutron beam, and a guidance device. The transmission device at least includes a first transmission part and a second transmission part which is detachably connected to the first transmission part, the first transmission part includes a first position L1 and a second position L2, and the guidance device guides the first transmission part and the neutron generation part to move from the first position L1 which the neutron generation part is accommodated in the beam shaping body to the second position L2 which the neutron generation part is separated from the beam shaping body.

Abstract: A method for replacing an identity certificate in a blockchain network includes a service subnet, a consensus subnet, and a routing layer used for isolating the service subnet from the consensus subnet. The method includes: receiving a root certificate replacement notification transmitted by a certificate authentication center; obtaining a public key corresponding to the certificate authentication center; verifying the root certificate replacement notification by using the obtained public key; forwarding the root certificate replacement notification to a consensus node in the consensus subnet after the validation succeeds, so that the consensus node records the root certificate replacement notification into a latest data block after a consensus on the root certificate replacement notification is reached; and requesting, when the data block is received, the certificate authentication center to replace an identity certificate.

Abstract: A neutron-capture therapy system includes a charged particle beam generation unit, a beam transmission unit and a neutron beam generation unit. The charged particle beam generation unit includes an ion source and an accelerator. The accelerator accelerates charged particles generated by the ion source, so as to obtain a charged particle beam of the required energy. The neutron beam generation unit includes a target, a beam shaping body and a collimator. The charged particle beam irradiates onto the target through the beam transmission unit to generate neutrons, which sequentially pass through the beam shaping body and the collimator to form a neutron beam for therapy. The neutron-capture therapy system is accommodated in a concrete building including an irradiation room, an accelerator chamber and a beam transmission chamber. The neutron beam generation unit is at least partially accommodated in a partition wall of the irradiation chamber and the beam transmission chamber.

Abstract: A neutron capture therapy system, including a vacuum tube for transmitting a charged particle beam, a neutron generating part for generating a neutron beam, and a beam shaping assembly for shaping the neutron beam. The beam shaping assembly is provided with an accommodating part. The neutron generating part is disposed at an end of the vacuum tube. The vacuum tube has a first position and a second position. The neutron capture therapy system further includes a removal device, which includes a moving part that drives the vacuum tube to move. The moving part has a third position and a fourth position. When the moving part is in the third position, the vacuum tube is in the first position. When the moving part is in the fourth position, the vacuum tube is in the second position, and the neutron generating part is located at the outer side of the beam shaping assembly.

Abstract: A radiation irradiation system including a radiation generating device and a carrying table, a beam generated by the radiation generating device irradiates an irradiated object on the carrying table, the radiation irradiation system further includes a carrying table positioning device, the carrying table is supported by the carrying table positioning device, the carrying table positioning device includes a positioning mechanism, the positioning mechanism includes a linear axis, the carrying table positioning device may horizontally move along the linear axis, and an extending direction of the linear axis is parallel to an irradiation direction of beams generated by the radiation generating device. In the positioning process of the carrying table, most of the carrying table positioning device is located in the space between the linear axis and the beam outlet, the radioactivity and life-span shortening caused by the radiation of the various components of the carrying table positioning device are reduced.

Abstract: Provided is an operation procedure of a positioning device of a radiation therapy system. The radiation therapy system includes a radiation generation device used to generate therapeutic radiation, an irradiation chamber used to accommodate an irradiation subject receiving the radiation, a management chamber used to achieve irradiation control, and a support device used to transport and support the irradiation subject. The support device includes a support member supporting the irradiation subject, an adjustment assembly for adjusting a spatial position of the support member, and a joining assembly fixedly connecting the support member and the adjustment assembly together in a detachable manner. The support member at least includes a first support member and a second support member having a different size and/or shape from the first support member. The invention allows switching between support members having different sizes and/or shapes according to an actual use requirement.

Abstract: An identity certificate may be issued to a blockchain node. The issuance may include issuing a first identity certificate to a first terminal and receiving a second identity certificate issuance request that is from the first terminal. A second identity certificate may be issued to the first terminal, and a third identity certificate issuance request is received from the second terminal. A third identity certificate is issued to the second terminal, so that the second terminal forwards the third identity certificate to the third terminal.

Abstract: A method for replacing an identity certificate in a blockchain network includes a service subnet, a consensus subnet, and a routing layer used for isolating the service subnet from the consensus subnet. The method includes: receiving a root certificate replacement notification transmitted by a certificate authentication center; obtaining a public key corresponding to the certificate authentication center; verifying the root certificate replacement notification by using the obtained public key; forwarding the root certificate replacement notification to a consensus node in the consensus subnet after the validation succeeds, so that the consensus node records the root certificate replacement notification into a latest data block after a consensus on the root certificate replacement notification is reached; and requesting, when the data block is received, the certificate authentication center to replace an identity certificate.

Abstract: A request is received to migrate a virtual instance from a source host compute node. The source host compute node is included in a distributed storage system environment. The virtual instance is migrated from the source host compute node to a first target host compute node. The first target host compute node has access to a first storage device. The first storage device includes one or more data units associated with the virtual instance. As part of the request to migrate the virtual instance, the one or more data units are migrated to a second storage device associated with the first target host compute node.

Abstract: A request is received to migrate a virtual instance from a source host compute node. The source host compute node is included in a distributed storage system environment. The virtual instance is migrated from the source host compute node to a first target host compute node. The first target host compute node has access to a first storage device. The first storage device includes one or more data units associated with the virtual instance. As part of the request to migrate the virtual instance, the one or more data units are migrated to a second storage device associated with the first target host compute node.

Abstract: Substrates for thrombin and assays for determining the level of bioactive thrombin in a sample are disclosed, wherein the substrate has the general formula: A-X—Z-A? wherein one of either A or A? comprises a luminescent chelate and the other one of A or A? comprises a first partner of a binding pair, X forms a tri- or tetra-peptide, and Z comprises a linker.