Abstract: Disclosed are a method, a device and a non-transitory storage medium. The method includes: deploying a detection satellite to fly in one detection orbital plane opposite to the satellites in the large-scale constellation, to sequentially detect satellites flying in one target orbital plane of the large-scale constellation in a manner that an approach distance between the detection satellite and a satellite being detected is within a set detection distance, transmitting the detection satellite from the one detection orbital plane to another detection orbital plane in virtue of Earth oblateness perturbation, so as to sequentially detect satellites flying in another target orbital plane of the large-scale constellation in a manner that the approach distance between the detection satellite and a satellite being detected is within the set detection distance, and stopping the detection satellite from detecting until all satellites of the large-scale constellation have been detected.

Abstract: The present disclosure belongs to the technical field of image processing, and discloses an ultrasound image processing method and system for ovarian cancer, a medium, a device, and a terminal. The method includes: obtaining pelvic ultrasound images and relevant clinical data of a patient; performing pelvic ultrasound image and relevant clinical information cleaning and pelvic ultrasound image quality control; and constructing an image classification model. Areas under the curve (AUCs) of performance of a deep convolutional neural network (DCNN) model based on the pelvic ultrasound image of the present disclosure for distinguishing ovarian cancer and non-cancer in an internal validation set and two external validation sets are 0.911, 0.870, and 0.831 respectively, which are superior to an average of diagnosis of ovarian cancer of 35 radiologists in the internal and external validation sets. An AUC of the DCNN for diagnosis of borderline ovarian tumors is 0.821.

Abstract: An ultra-high molecular weight, ultra-fine particle size polyethylene has a viscosity average molecular weight (Mv) greater than 1×106. The polyethylene is spherical or are sphere-like particles having a mean particle size of 10-100 ?m, having a standard deviation of 2-15 ?m and a bulk density of 0.1-0.3 g/mL. Using the polyethylene as a basic polyethylene, a grafted polyethylene can be obtained by means of a solid-phase grafting method; and a glass fiber-reinforced polyethylene composition comprising the polyethylene and glass fibers, and a sheet or pipe prepared therefrom; a solubilized ultra-high molecular weight, ultra-fine particle size polyethylene; and a fiber and a film prepared from the solubilized ultra-high molecular weight, ultra-fine particle size polyethylene may also be obtained. The method has simple steps, is easy to control, has a relatively low cost and a high repeatability, and can realize industrialisation.

Abstract: The present invention relates to the technical field of catalyst preparation, and discloses a preparation method of a Ziegler-Natta catalyst. The method includes the following steps: subjecting magnesium halide, alcohol and an electron donor to a first contact reaction in the presence of an inert solvent to obtain a magnesium halide alcoholate and performing first cooling; subjecting titanium halide to second cooling; subjecting the cooled titanium halide, the cooled product containing the magnesium halide alcoholate and an electron donor to a second contact reaction; filtering the product of the second contact reaction to obtain the Ziegler-Natta catalyst; and subjecting the Ziegler-Natta catalyst and the heated titanium halide to a third contact reaction. The method has the advantages such as short cycle, high efficiency, etc., being suitable to industrial production.

Abstract: A technology for ultra-wide circular scanning imaging by an optical satellite is provided. Calculating an angle ?1 between the outermost field of view of an area array camera (2) and an earth-pointed axis (q) of a satellite (1) according to the width W required for ground imaging coverage in a direction perpendicular to the flight direction (b) of the satellite (1) and according to the height h of the orbit of the satellite (1); installing the area array camera (2) on a side surface of the satellite (1) according to the angle ?1; calculating the maximum rotation angle ?max allowed by the satellite (1) according to the minimum exposure time T of a detector of the satellite (1) and the worst ground pixel resolution r of the satellite (1); selecting a rotation speed ? of the satellite (1) that is less than ?max, and setting the rotation speed ? to be the rotation speed relative to the ground.

Abstract: A technology for ultra-wide circular scanning imaging by an optical satellite is provided. Calculating an angle ?1 between the outermost field of view of an area array camera (2) and an earth-pointed axis (q) of a satellite (1) according to the width W required for ground imaging coverage in a direction perpendicular to the flight direction (b) of the satellite (1) and according to the height h of the orbit of the satellite (1); installing the area array camera (2) on a side surface of the satellite (1) according to the angle ?1; calculating the maximum rotation angle ?max allowed by the satellite (1) according to the minimum exposure time T of a detector of the satellite (1) and the worst ground pixel resolution r of the satellite (1); selecting a rotation speed ? of the satellite (1) that is less than ?max, and setting the rotation speed ? to be the rotation speed relative to the ground.

Abstract: An ultra-high molecular weight, ultra-fine particle size polyethylene has a viscosity average molecular weight (Mv) greater than 1×106. The polyethylene is spherical or are sphere-like particles having a mean particle size of 10-100 ?m, having a standard deviation of 2-15 ?m and a bulk density of 0.1-0.3 g/mL. Using the polyethylene as a basic polyethylene, a grafted polyethylene can be obtained by means of a solid-phase grafting method; and a glass fiber-reinforced polyethylene composition comprising the polyethylene and glass fibers, and a sheet or pipe prepared therefrom; a solubilized ultra-high molecular weight, ultra-fine particle size polyethylene; and a fiber and a film prepared from the solubilized ultra-high molecular weight, ultra-fine particle size polyethylene may also be obtained. The method has simple steps, is easy to control, has a relatively low cost and a high repeatability, and can realize industrialisation.