Abstract: Aqueous dispersion comprising polyurethane or polyurethane-urea, a preparation method therefor and a use thereof. The polyurethane or polyurethane-urea is prepared by reacting raw materials comprising the following components: a compound having a tertiary amine group and at least one NCO reactive functional group, a polyester polyol having a number average molecular weight of 400 to 5000 and a functionality of 2 to 3, an organic compound having at least two isocyanate groups, a hydrophilic compound having one or more of an ionic group, a potential ionic group and a non-ionic group and having 2 to 3 NCO reactive functional groups, and a mono-functional non-ionic hydrophilic compound having at least one NCO reactive functional group. The aqueous dispersion can be stably stored for a prolonged period of time, and an adhesive prepared from the aqueous dispersion has an improved hydrolysis resistance while maintaining good bonding strength and heat resistance.

Abstract: It discloses an atmospheric polarized light orientation method using a solar azimuth region, provides an angle of polarization (AOP) vision-modulated model in a pixel frame, and gives an orientation strategy utilizing the solar azimuth region; a horizontal attitude angle is introduced into the AOP in the pixel frame, and orientation is implemented by utilizing a separation point and a principal point of photograph; specifically, a seed line extraction algorithm is given to update the solar azimuth in real time, a morphological expression and an AOP expression of the solar azimuth are fused for an optimum estimation to the solar azimuth, and ultimately the orientation is achieved by using an external sensor such as an inertial navigation system to input the horizontal attitude angle.

Abstract: A radiotherapy head can include an electron accelerator, a deflection control assembly, a collimator, and a target material. The deflection control assembly is provided between the electron accelerator and the collimator, the collimator is provided with a plurality of collimating holes, and the target material is provided at an entrance of the each of the plurality of collimating holes; the deflection control assembly is configured to adjust a deflection angle of electron beams emitted by the electron accelerator, and emit angle-deflected electron beams to the target material; the target material is configured to convert the electron beams emitted to the target material into X-rays; and the collimator is configured to project the X-rays to a target via the plurality of collimating holes.

Abstract: A radiation treatment head can include: a radiation source and a primary collimator, wherein the radiation source is configured to emit a radioactive beam; wherein the primary collimator is provided with a plurality of primary collimation channel groups; each of the primary collimation channel groups includes at least one primary collimation channel; and the radiation source and the primary collimator are movable relative to each other, so that the beam emitted from the radiation source is permissible to pass through any one of the primary collimation channels; and wherein the beam emitted from the radiation source, after passing through primary collimation channels of different primary collimation channel groups, forms fields with different sizes of areas on a reference plane.

Abstract: A microwave power control device can include: a microwave signal generator and a signal distribution circuitry connected to the microwave signal generator. The microwave signal generator is configured to generate microwave signals and transmit the microwave signals to the signal distribution circuitry; and the signal distribution circuitry is configured to distribute the microwave signals to n accelerating tubes according to a target microwave power distribution ratio, n being an integer greater than or equal to 2.

Abstract: A multi-leaf collimator includes a first carriage, a second carriage, a drive device, a first set of leaves disposed on the first carriage, and a second set of leaves disposed on the second carriage, wherein the first set of leaves and the second set of leaves are disposed oppositely to each other, and each leaf in each of the sets of leaves is movable relative to each respective carriage; and the drive device is configured to drive the first carriage and the second carriage to move in the same direction synchronously.

Abstract: The present disclosure provides a radiation therapy device and system. The radiation therapy device includes a first treatment head and a second treatment head. A beam emitted from the second treatment head intersects with a beam emitted from the first treatment head at an intersection point. The first treatment head is an X-ray treatment head, and the second treatment head is an X-ray treatment head, a multi-source focusing treatment head, or an intensity-modulated treatment head. The radiation therapy device may increase a dose rate at the intersection point.

Abstract: Provided are methods of contacting a tissue inside a subject with light by applying an ultrasound signal to a photoexcited mechanoluminescent particle while the mechanoluminescent particle is inside the subject and in proximity to the tissue, thereby causing the mechanoluminescent particle to emit light that contacts the tissue. Provided are systems and kits for performing such methods.

Abstract: A multi-leaf collimator can include a first carriage, a second carriage, a drive device, a first set of leaves disposed on the first carriage, and a second set of leaves disposed on the second carriage, wherein the first set of leaves and the second set of leaves are disposed oppositely to each other, and each leaf in each of the sets of leaves is movable relative to the carriage; and the drive device is configured to drive the first carriage and the second carriage to move in the same direction synchronously.

Abstract: A radiotherapy equipment including: a rotating gantry, an X-beam generating assembly and a treatment couch. The X-beam generating assembly is on the rotating gantry, rotates about a rotation axis of the rotating gantry driven by the rotating gantry, and generates an X-beam deflected with respect to a rotating plane of the rotating gantry in a direction of the rotation axis, and the rotating gantry and the X-beam generating assembly are stationary in the direction of the rotation axis. The treatment couch is on a side of the rotating gantry for supporting a patient, and moves along the direction of the rotation axis to cooperate with a deflection of the X-beam to irradiate a target of the patient with the X-beam.

Abstract: A radiotherapy head can include an electron accelerator, a deflection control assembly, a collimator, and a target material. The deflection control assembly is provided between the electron accelerator and the collimator, the collimator is provided with a plurality of collimating holes, and the target material is provided at an entrance of the each of the plurality of collimating holes; the deflection control assembly is configured to adjust a deflection angle of electron beams emitted by the electron accelerator, and emit angle-deflected electron beams to the target material; the target material is configured to convert the electron beams emitted to the target material into X-rays; and the collimator is configured to project the X-rays to a target via the plurality of collimating holes.

Abstract: A radiation treatment head can include: a radiation source and a primary collimator, wherein the radiation source is configured to emit a radioactive beam; wherein the primary collimator is provided with a plurality of primary collimation channel groups; each of the primary collimation channel groups includes at least one primary collimation channel; and the radiation source and the primary collimator are movable relative to each other, so that the beam emitted from the radiation source is permissible to pass through any one of the primary collimation channels; and wherein the beam emitted from the radiation source, after passing through primary collimation channels of different primary collimation channel groups, forms fields with different sizes of areas on a reference plane.

Abstract: A microwave power control device can include: a microwave signal generator and a signal distribution circuitry connected to the microwave signal generator. The microwave signal generator is configured to generate microwave signals and transmit the microwave signals to the signal distribution circuitry; and the signal distribution circuitry is configured to distribute the microwave signals to n accelerating tubes according to a target microwave power distribution ratio, n being an integer greater than or equal to 2.

Abstract: The present disclosure provides a radiation therapy device and system. The radiation therapy device includes a first treatment head and a second treatment head. A beam emitted from the second treatment head intersects with a beam emitted from the first treatment head at an intersection point. The first treatment head is an X-ray treatment head, and the second treatment head is an X-ray treatment head, a multi-source focusing treatment head, or an intensity-modulated treatment head. The radiation therapy device may increase a dose rate at the intersection point.

Abstract: The present invention relates to a novel incision-free adaptive TVT-XO for treatment of urinary incontinence, comprising a tape body (1), wherein the tape body (1) comprises a left tape (11) and a right ape (12); each of the left tape (11) and the right ape (12) comprises a mesh band (13); a fixing anchor (14), configured to fix one end of the tape body (1) between the obturator fascia and the obturator externus muscle of the pelvis, is disposed at one end of the mesh band (13); male and female snap buckles (15) are disposed at the other ends of the mesh bands (13) of both the left tape (11) and the right ape (12), respectively; the left tape (11) and the right ape (12) are combined by means of insertion of the male and female snap buckles (15) to form a cross structure, which is “”-shaped.

Abstract: Provided is a process for preparing a composition comprising semiconducting single-walled carbon nanotubes, a semiconducting polymer and solvent A (composition A), which process comprises the step of separating composition A from a composition comprising semiconducting and metallic single-walled carbon nanotubes, the semiconducting polymer and solvent B (composition B), wherein the semiconducting polymer has a band gap in the range of 0.5 to 1.8 eV and solvent A and B comprise an aromatic or a heteroaromatic solvent, composition A itself, a process for forming an electronic device, which process comprises the step of forming a layer by applying composition A to a precursor of the electronic device, as well as the electronic device obtainable by this process.

Abstract: Provided is a process for preparing a composition comprising semiconducting single-walled carbon nanotubes, a semiconducting polymer and solvent A (composition A), which process comprises the step of separating composition A from a composition comprising semiconducting and metallic single-walled carbon nanotubes, the semiconducting polymer and solvent B (composition B), wherein the semiconducting polymer has a band gap in the range of 0.5 to 1.8 eV and solvent A and B comprise an aromatic or a heteroaromatic solvent, composition A itself, a process for forming an electronic device, which process comprises the step of forming a layer by applying composition A to a precursor of the electronic device, as well as the electronic device obtainable by this process.

Abstract: The present invention provides an extendible support mechanism in which a counterbalance system allows extension and retraction of the arm to be carried out with the same level of mechanical effort. Embodiments of the present invention allow the system to be used in a plurality of orientations, and thus the invention has particular utility in the extension and retraction of peripheral devices for radiotherapy systems, where use of a rotatable gantry is common.

Abstract: The present invention provides an extendible support mechanism in which a counterbalance system allows extension and retraction of the arm to be carried out with the same level of mechanical effort. Embodiments of the present invention allow the system to be used in a plurality of orientations, and thus the invention has particular utility in the extension and retraction of peripheral devices for radiotherapy systems, where use of a rotatable gantry is common.