418 results about "Space radiation" patented technology

Provided herein are methods and systems for designing a radiation treatment for a subject using single arc dose painting. The methods and systems comprise an algorithm or a computer-readable product having the same, to plan the radiation treatment. The algorithm converts pairs of multiple leaf collimation (MLC) leaves to sets of leaf aperture sequences that form a shortest path single arc thereof where the pairs of MLC leaves each aligned to an intensity profile of densely-spaced radiation beams, and connects each single arc of leaf apertures to form a final treatment single arc. Also provided is a method for irradiating a tumor in a subject using single arc dose painting.

The invention discloses an FPGA (Field Programmable Gate Array)-based single event effect test system for a NAND FLASH device and belongs to the technical field of space radiation effect and reinforcement technology. The system comprises a communication interface module, a peripheral control platform, an upper computer, a tested device, an analog source, a power switch and an FPGA, wherein the FPGA comprises a cache module, a control module, an input/ output reading and writing module, a sensor input/ output module and a detection result module. The system can be used for testing the single event effect of a large-capacity NAND FLASH device to obtain single event effect characteristic parameters, and further the anti-single event effect capability of the tested device can be estimated through the analysis on the obtained parameters.

An antenna device is composed of a metal frame of an electronic device. The free space radiation efficiency and the handheld radiation efficiency are balanced by forming gaps in a bottom metal frame and side metal frames. In a free space scene, the longitudinal mode of the antenna is strong, and the radiation efficiency of the free space is good. When the electronic equipment is held by hand, thetransverse mode of the antenna is strong. The handheld radiation efficiency is good.

A logging system for measuring parameters of earth formation penetrated by a well borehole. Measurements made with the system are not adversely affected by varying pressure encountered a borehole environment. This is accomplished by the use of a main compensation element and a detector compensation element render source and detector geometry invariant to varying pressure. The system is particularly suited for nuclear LWD systems such as back scatter gamma ray density systems. The basic concepts of the system are, however, applicable to other types of nuclear measurement systems that comprise one or more radiation sources, and one or more axially spaced radiation detectors, where system response is a function of source-detector spacing. The basic concepts of the system are also applicable to other types of logging systems, such as electromagnetic and acoustic, where source (transmitter) and sensor (receiver) elements require invariant geometry in order to maximize accuracy of measurements.

The invention relates to a selective absorption emission composite material meeting requirements of solar heat collection and radiation refrigeration. The selective absorption emission composite material comprises a substrate, wherein a selective absorption layer and a selective emission layer are sequentially arranged on the substrate; the selective absorption layer has high absorption rate in a solar radiation spectral region with a wavelength of below 3 microns; the selective emission layer has high emission rate in a space radiation refrigeration spectral region with a wavelength of 8-13 microns. The selective absorption emission composite material has the high absorption rate in a spectral region with strong solar radiation in daytime, the low emission rate in medium-far infrared spectral regions, the high emission rate in a spectral region with space radiation refrigeration at night, and the low emission rate in other medium-far infrared spectral regions, thereby obtaining heat by absorbing solar radiation in daytime, obtaining cool energy through space radiation at night, reducing the radiation heat (cold) loss with ground and atmosphere during heat collection in daytime and refrigeration at night, and being capable of efficiently realizing two functions of solar heat collection and radiation refrigeration.

The invention discloses a low-orbit/middle-orbit double-layer satellite optical network structure system. Global coverage low-orbit satellite constellation designed on the basis of a coverage zone method and middle-orbit satellite constellation form a double-layer satellite optical network structure system. The system is connected with at least 76 satellites, wherein, a low-orbit satellite layer is provided with at least 7 orbits, and each orbit is connected with at least 10 satellites; a middle-orbit satellite layer is composed of an outer orbit and an inner orbit, wherein, the outer orbit is respectively connected with the satellites, and the inner orbit is respectively connected with the satellites. The calculation method is as follows: calculating the radius theta of a single satellite covering circle; calculating the halfangle psi of the covering zone; calculating delta B; calculating alpha'; calculating sin alpha; and calculating the distribution of P orbits on the equator. The structure is stable topological structure, the changes of inter-satellite links pitch angle and azimuth angle are smaller than the changes of the inter-satellite links pitch angle and the azimuth angle of the non-zero phase constellation, satellite switch is reduced, satellite-carried resources are saved, and management of the low-orbit satellite layer is effectively strengthened; the middle-orbit satellite constellation is least affected by space radiation, and the system life cycle is lengthened.

The invention discloses an FPGA (Field Programmable Gate Array)-based single event effect test method for a NAND FLASH device and belongs to the field of space radiation effect and reinforcement. The method comprises an upper computer, a 50MHz crystal oscillator, a program configuration port JTAG (Joint Test Action Group), an FPGA control module and an NANF FLASH test module. The test method comprises the following four working modes: 1) static mode; 2) dynamic mode; 3) dynamic reading/ writing mode; and 4) dynamic reading/ erasing/ writing mode. With the method, single event effect test of the large-volume NAND FLASH memory can be realized. Under the condition of an experimental analog source, single event effect characteristic parameters can be efficiently obtained.

The embodiment of the invention relates to the field of communication, and discloses an antenna system and a mobile terminal. The antenna system is applied to the mobile terminal. The antenna system comprises a first feeding point which is arranged on a circuit board, a first millimeter wave array antenna which is electrically connected to the first feeding point, a second feeding point, a secondmillimeter wave array antenna which is electrically connected to the second feeding point, a third feeding point, a third millimeter wave array antenna which is electrically connected to the third feeding point, a fourth feeding point, and a fourth millimeter wave array antenna which is electrically connected to the fourth feeding point, wherein the beam of the first millimeter wave array antennacovers the space (X is more than 0); the beam of the second millimeter wave array antenna covers the space (X is less than 0); the beam of the third millimeter wave array antenna covers the space (Y is more than 0); the fourth millimeter wave array antenna covers the space (Y is less than 0). According to the system, the beam covering range in the surrounding space of the mobile terminal is expanded, so that the space radiation covering rate of the antenna is increased, and the capacity of receiving signals by the mobile terminal is improved.

The invention discloses radiation property testing method and system. The method comprises the following steps of: constructing a notebook computer placing method and a wireless data terminal testing model of the notebook computer; establishing a spheric coordinate system by using an antenna of the wireless data terminal as the origin point, and selecting a testing point in the spheric coordinate system; placing the testing model in a full dark wave chamber to enable the wireless data terminal to work in a data mode, utilizing the measuring antenna to collect the total radiation power in the testing point of the spheric coordinate system, and then obtaining the total radiation power of the wireless data terminal. By using the technical scheme, the invention can truly reflect the influence of the original element coupling of the notebook computer on the space radiation property of the wireless data terminal when the wireless data terminal of the notebook computer is in the data mode, and the system has high truth and is easy to use.

The invention relates to the technical field of electromagnetic radiation scanning and positioning, and aims to provide an electromagnetic radiation scanning and positioning method to replace the mechanical scanning technology, so that the electromagnetic radiation strength in each position of a circuit to be tested can be rapidly scanned and detected, a radiation source can be fixed, and continuous scanning and dynamic display can be realized. The method adopts an array type electromagnetic radiation detecting probe and the electronic switch technology, achieves unique spectrum and space scanning functions, and realizes the effects of scanning a selected area in a frequency range, and measuring the radiation circumstance of the whole frequency band in each special position of a tested object so as to obtain complete electromagnetic field information of the tested object. Data acquired by a scanning antenna under the control of electromagnetic scanning test software is subjected to fitting processing, so as to draw an electromagnetic radiation frequency spectrum and a spatial radiation cloud picture. The invention provides the method and equipment for the field of electromagnetic radiation measure, so as to quickly perform two-dimensional electromagnetic radiation scanning and positioning in a real-time manner.

There is provided a radiation shield device for providing radiation protection to an area, such as a manned vehicle. The radiation shield device comprises a magnetic field generator, such as a solenoid, of superconductive material that provides a magnetic field around the area to shield the area from radiation. The magnetic field generator preferably comprises at least one trapezoidal portion to provide substantially isotropic protection to the area. A thermal control system, comprising a limited amount of coolant or a refrigeration cycle, is included to control a temperature of the superconductive material during operation of the magnetic field generator. A magnetic shield device may also be provided between the magnetic field generator and the area to be shielded from radiation to substantially shield the area from the magnetic field generated by the magnetic field generator.

The embodiments of the invention relate to the communication field and disclose an antenna system and a mobile terminal. The antenna system is applied to the mobile terminal. The antenna system comprises a first feeding point arranged on a circuit board, a first millimeter wave array antenna electrically connected to the first feeding point, a second feeding point, a second millimeter wave array antenna electrically connected to the second feeding point, a third feeding point, a third millimeter wave array antenna electrically connected to the third feeding point, a fourth feeding point and afourth millimeter wave array antenna electrically connected to the fourth feeding point. The wave beam of the first millimeter wave array antenna covers a space where Z is greater than 0. The wave beam of the second millimeter wave array antenna covers a space where the Z is less than 0. The wave beam of the third millimeter wave array antenna covers a space where Y is greater than 0. The wave beam of the fourth millimeter wave array antenna covers a space where the Y is less than 0. In the invention, the wave beam covering range of the antenna system to the spaces surrounding the mobile terminal is increased so that the space radiation covering rate of the antenna system is improved and a capability for the mobile terminal to receive signals is enhanced.

The invention provides a method for a simulation test about the comprehensive space radiation effect of a surface function material for a spacecraft, which belongs to the field of space environment engineering and can be applied to evaluation on the space environment effect of the surface function material for the spacecraft. When the spacecraft is in an on-orbit working, most surface function materials are directly exposed in the on-orbit environment, and the influence of the radiation environment is more severe. The surface function materials are irradiated by electrons, protons, alpha particles and heavy ions with wider energy and flux, and the radiation of all the particles can lead the performances of the surface function materials to be deteriorated. In a long-life design of a satellite, the capability of bearing the influence of the environment with comprehensive space radiation needs to be inspected. The method provided by the invention has an important significance in evaluation on the ground simulation test about the orbit radiation effect of the surface function material for the spacecraft.

The invention discloses a wireless router control method and device and a wireless router applying the same. Data flow between the wireless router and a terminal is monitored in real time, when the real-time data flow is smaller than a preset flow lower limiting value, real-time transmitting power of the wireless router is reduced, resource consumption of the wireless router is reduced on the premise that the signal transmitting quality is not affected, and space radiation quantity is reduced.

The invention discloses a space electromagnetic intensity distribution analysis method, which comprises the following steps of: 1, determining an observation and test space region according to space electromagnetic intensity analysis requirements, and meshing the region, wherein a test point in subsequent steps can be selected from mesh regions; 2, calculating a relative distance and a relative direction between the point and each piece of equipment according to the position of the test point; 3, calculating a time-domain signal of the test point according to a formula for a composite signal by utilizing calculation results obtained by the step 2; 4, performing Fourier transform on the time-domain composite signal obtained by the step 3 to obtain the frequency-domain energy distribution of the space composite signal at the test point; and 5, repeating the steps 2 to 4 for the whole observation and test region to obtain the composite electromagnetic radiation intensity data of a space radiation source of the observation and test region. According to the method, the distribution of the space electromagnetic intensity can be analyzed more accurately and efficiently.

A plasma processing apparatus includes: a processing container which defines a processing space; a microwave generator; a dielectric having an opposing surface which faces the processing space; a slot plate formed with a plurality of slots; and a heating member provided within the slot plate. The slot plate is provided on a surface of the dielectric at an opposite side to the opposing surface to radiate microwaves for plasma excitation to the processing space through the dielectric based on the microwaves generated by the microwave generator.

There is provided a radiation shield device for providing radiation protection to an area, such as a manned vehicle. The radiation shield device comprises a magnetic field generator, such as a solenoid, of superconductive material that provides a magnetic field around the area to shield the area from radiation. The solenoid preferably defines an axial length that is substantially smaller than a diameter of the solenoid. A thermal control system, comprising a limited amount of coolant or a refrigeration cycle, is included to control a temperature of the superconductive material during operation of the magnetic field generator. A magnetic shield device is also provided between the magnetic field generator and the area to be shielded from radiation to substantially shield the area from the magnetic field generated by the magnetic field generator.

The invention discloses a dynamic multi-frequency multi-beam spatial arbitrary scanning reflection array comprising a feed source horn, a stacked multilayer reflective array, and a control excitation module loaded on the array. A reflective array unit can be constructed flexibly at a reconfigurable surface loaded at each layer of array to meet work requirements at different frequency bands in different space radiation directions, thereby realizing multi-band work and arbitrary-direction radiation of beams. On the basis of the multi-layer structure, multi-frequency work is realized and spatial beam directions in respective operating frequencies can be designed respectively to realize a frequency-division and beam-division effect. The reflective array units in the array can be regulated dynamically and dynamic scanning of reflected beams in any spatial direction can be realized.

The invention belongs to the technical field of renewable energy and air conditioners and discloses a heat collection-radiation device and a refrigeration system thereof. The device comprises a support and a heat collection-radiation unit, the heat collection-radiation unit comprises a heat collection part and a radiation heat part, the heat collection part comprises a reflection mirror and a heatcollection pipe, and the reflection mirror reflects sunlight heat and accumulates the sunlight heat on the heat collection pipe for heating; the radiation heat part comprises a cooling pipe and selective radiation thin film, the selective radiation thin film transmits an electromagnetic wave, the electromagnetic wave penetrates through an atmospheric window, heat is radiated to the outer space, and the temperature in the cooling pipe is lowered. The invention further discloses the refrigeration system. The system comprises the heat collection-radiation device, an absorption-type refrigerationdevice and a cold water tank, the absorption-type refrigeration device and the cold water tank are connected with the two ends of the heat collection-radiation device respectively, during daytime, after heating of the heat collection-radiation device, the refrigeration device is driven to conduct refrigeration, and at night, the heat collection-radiation device is used for radiating heat to the outer space for refrigeration. By means of the heat collection-radiation device, the defects are overcome that sunlight cannot be used at night, and the refrigeration effect through space radiation during daytime is poor. The refrigeration process of near-zero energy consumption is achieved.

The invention relates to a GaAs solar battery life predicting method under space radiation environment, belonging to the space environment engineering field and spacecraft solar battery array design field; the relation of non-ionizing energy loss and incident electron energy of electrons in the solar battery material is analog-commutated by utilizing a Geant4 software radiation transportation tool box, so as to obtain the relation curve of battery damage coefficient and displacement damage dose; particle flux energy spectrum of a GEO orbit and attenuation spectrum after penetrating through a quartz glass cover sheet are analog-commutated; a life predicting model of the solar battery is built under the GEO orbit radiation environment by utilizing the solar battery damage coefficient obtained by a ground simulation test and the displacement damage dose of a space orbit, obtained by analog commutation. In the invention, by utilizing the displacement damage dose method, the effect of different space radiation environment to the attenuation of the battery performance parameter can b predicted, so as to predict the in-orbit service life of the solar battery, determine the characteristic curve and save the test expense and time.

The invention discloses a reliability prediction method, comprising the following steps of respectively calculating the failure rate lambda SEE (single event effect), lambda TID (total ionizing effect) and lambda DD (displacement damage) of an SEE, TID and DD; calculating the failure rate lambda space caused by a space radiation environment according to a formula of lambda space=lambdaTID+lambdaDD+lambdaSEE; calculating the total failure rate lambda according to the formula of lambda=lambdaNOspace+lambdaspace, wherein the lambdaNOspace is the failure rate of caused by a non-space radiation environment. According to the reliability prediction method, the radiation stress response is considered, and the reliability prediction method can be used for the reliability prediction of aerospace radiation sensing elements; the prediction result of the method is more accurate compared with that of a constant failure rate-based reliability prediction method.

Aiming at the problems that time and labor are wasted when female and male silkworm eggs with different egg colors are separated and the requirement of production of silkworm seeds on time schedule is difficult to meet, the invention provides an instrument for automatically and accurately separating female and male silkworm eggs at a high speed, and the instrument is labor-saving and ensures thatthe silkworm eggs are not damaged. The separator for female and male silkworm eggs, provided by the invention, takes the characteristic that different sexual silkworm eggs have different egg colors as a design characteristic for recognizing and distinguishing the female and male silkworm eggs and focuses on overcoming the physiological property of the silkworm eggs that the silkworm eggs is not favorable for mechanical and automatic control. Through applying technologies such as turnplate type obliquely scraping egg transportation, and the like and using devices such as a single-channel prearranged counting and number control egg supply device, a multi-channel coil shunting and spaced radiation state sorting device, a respectively independent color sensor photoelectric recognition and electromagnetic egg pocketing device separation device, an obliquely scrapping, egg collecting and separately storing device and the like, high-speed and precise female and male silkworm egg separation is realized, the purposes of not damaging the silkworm eggs and maintaining the activity of the silkworm eggs are achieved, and labor is also greatly reduced.

This invention relates to technology used for creating an enhanced artificial magnetosphere or electromagnetic shield for use in both manned and unmanned spacecraft. The invention includes an Interference Generating Pattern (IGP) which is tuned to the high-frequency radiation of X-rays and gamma rays and a conformal magnetic field. This technology will reduce the exposure of astronauts or other space travelers, as well as radiation-sensitive equipment, to the environmental hazards present therein. The net result will be reduced radiation intensity in order to create a space radiation-free environment as to render space travel safe.