This paper intends to describe how to design an optimized and effective strategic information system （SIS） by using the existing resources under the new market circumstances in China. Some feasible methods are thus ...This paper intends to describe how to design an optimized and effective strategic information system （SIS） by using the existing resources under the new market circumstances in China. Some feasible methods are thus proposed, which are about the design of SIS by detailed analysis of the principle requirements. The paper also puts forward the architecture and configuration of SIS in China in general.展开更多
The BGHMS system described in this paper was designed to model the geohistory for cratonic basins and written in turbo BASIC language with a user-friendly interface for data inputs and outputs on IBM PC-compatible com...The BGHMS system described in this paper was designed to model the geohistory for cratonic basins and written in turbo BASIC language with a user-friendly interface for data inputs and outputs on IBM PC-compatible computers. The major mathematical models in this system include the models of compaction correction. unconformity restoration. sea-level change and paleo-water-depth correction. and tectonic subsidence modeling. Two geological events of sediment compaction and erosion are considered in this system. It consists of three modules for data input, geohistory modeling and graph conversion and output. containing more than twenty subroutine programs, is an easy-to-use. menu-driven program system with many obvious advantages, and is a useful tool for hydrocarbon geologists to make quantitative studies on geohistory and to make exploration decisions in regional evaluation.展开更多
The aim of research on software architecture is to improve the quality attributes of software systems, such as security, reliability, maintainability, testability, reassembility, evolvability. However, a single runnin...The aim of research on software architecture is to improve the quality attributes of software systems, such as security, reliability, maintainability, testability, reassembility, evolvability. However, a single running system is hard to achieve all these goals. In this paper, software-cell is introduced as the basic unit throughout developing process. Then it is further advanced that a robust, safe and high-quality software system is composed of a running system and four supportive systems. This paper especially discusses the structure of software-cell, the construction of the five systems, and the relations between them.展开更多
China's first Mars exploration mission will carry out comprehensive global surveys of the planet from data collected by instruments carried in orbit and roving on the planet itself.Goals of the mission include det...China's first Mars exploration mission will carry out comprehensive global surveys of the planet from data collected by instruments carried in orbit and roving on the planet itself.Goals of the mission include detailed inspections and surveys of key areas on the surface of Mars.One of the main scientific payloads installed on the orbiter is the moderate resolution camera.Its mission is to image the surface of Mars sufficiently to produce a global remote sensing image map of the planet,and to explore and record changes to the topography of Mars,including major geological structures,and to advance research on topography and geomorphology in general.The moderate resolution camera uses a lightweight and compact integrated design;its primary components are an optical module,a focal plane module,a camera control module,a power and interface module,a camera support module,a thermal control module,and a reference module.Radiometric calibration,color calibration,and geometric calibration have been carried out to ensure that the camera can acquire sufficient accurate data to complete mission goals.This paper introduces the camera's detection mission,its system composition,and its working principle;it also describes the camera's ground calibration tests and their results,and provides a reference for processing the camera's scientific data and for future applications.展开更多
Upper stage is an indispensable vehicle in the space transportation system.For its role in multi-satellite transportation area in China,the development of the Yuanzheng 3 upper stage was approved.The article introduce...Upper stage is an indispensable vehicle in the space transportation system.For its role in multi-satellite transportation area in China,the development of the Yuanzheng 3 upper stage was approved.The article introduces in detail the Yuanzheng 3 upper stage development requirements,task definition and systems as well as main features and performance including payload capacity and insertion accuracy for typical orbits,interfaces with satellites.The article also presents the development cycle of Yuanzheng 3 upper stage,which is divided into 3 stages including concept demonstration stage,prototype stage and flight proof stage.The Yuanzheng 3 upper stage,which will make its maiden flight in 2018,is capable of restarting more than 20 times,and operating for more than 48 hours.It is equivalent to mainstream upper stages in the world in terms of performance,such as restart times,in-orbit operation time,independent digital control system,and adaptable behavior for various tasks.Technologies tackled and accumulated in the development of the Yuanzheng 3 upper stage will lay a solid foundation for the development of future space transportation vehicles.展开更多
For the needs of manned landing,station construction,and material transfer in future lunar exploration missions,the paper proposes a landing–moving integrated gear(LMIG)for mobile lunar lander(MLL),establishes and op...For the needs of manned landing,station construction,and material transfer in future lunar exploration missions,the paper proposes a landing–moving integrated gear(LMIG)for mobile lunar lander(MLL),establishes and optimizes the models of cushioning energy-absorbing and movement planning,respectively,and conducts the prototype tests.First,the design requirements of LMIG are given,and the system composition of LMIG and the configuration design of each subsystem are introduced.Second,the effective energy-absorbing model of the aluminum honeycomb is established and experimentally verified,a three-stage aluminum honeycomb buffer is designed and experimentally verified,and the buffer mechanism of LMIG is verified by simulations under various landing conditions.Furthermore,the kinematic and dynamic models of LMIG are established,the moving gait is designed by the center of gravity trajectory planning method,and the driving trajectory during the stepping process is optimized with the goal of minimal jerk of motion.Finally,a cushioning test prototype and a walking test scaled prototype of LMIG are developed,and single leg drop test and ground walking test are carried out.The results show that the established model of LMIG is reasonable,the designed buffer and gait of LMIG are effective,the developed prototypes of LMIG have good cushioning and movement performance,the LMIG’s maximum value of overload acceleration is 6.5g,and the moving speed is 108 m/h,which meets the design requirements.展开更多
Intelligent well technology is an oil and gas well optimization completion technology integrated with underground real-time monitoring,data analysis decision-making and remote control of downhole tools.It's of gre...Intelligent well technology is an oil and gas well optimization completion technology integrated with underground real-time monitoring,data analysis decision-making and remote control of downhole tools.It's of great significance to the transformation and innovation of China's oil and gas development projects.The author of this paper expounds the definition,principle,composition and characteristics of intelligent well technology,and introduces the development status quo of intelligent well technology abroad,including mature intelligent well system,key technology research of intelligent well and its application technology.After the introduction to the related technology research of intelligent well in China,the author puts forward some opinions on the development of our own complete intelligent well system.展开更多
文摘This paper intends to describe how to design an optimized and effective strategic information system （SIS） by using the existing resources under the new market circumstances in China. Some feasible methods are thus proposed, which are about the design of SIS by detailed analysis of the principle requirements. The paper also puts forward the architecture and configuration of SIS in China in general.
文摘The BGHMS system described in this paper was designed to model the geohistory for cratonic basins and written in turbo BASIC language with a user-friendly interface for data inputs and outputs on IBM PC-compatible computers. The major mathematical models in this system include the models of compaction correction. unconformity restoration. sea-level change and paleo-water-depth correction. and tectonic subsidence modeling. Two geological events of sediment compaction and erosion are considered in this system. It consists of three modules for data input, geohistory modeling and graph conversion and output. containing more than twenty subroutine programs, is an easy-to-use. menu-driven program system with many obvious advantages, and is a useful tool for hydrocarbon geologists to make quantitative studies on geohistory and to make exploration decisions in regional evaluation.
基金the National Natural Science Foundation of China(No.70 0 73 0 2 2 )
文摘The aim of research on software architecture is to improve the quality attributes of software systems, such as security, reliability, maintainability, testability, reassembility, evolvability. However, a single running system is hard to achieve all these goals. In this paper, software-cell is introduced as the basic unit throughout developing process. Then it is further advanced that a robust, safe and high-quality software system is composed of a running system and four supportive systems. This paper especially discusses the structure of software-cell, the construction of the five systems, and the relations between them.
文摘China's first Mars exploration mission will carry out comprehensive global surveys of the planet from data collected by instruments carried in orbit and roving on the planet itself.Goals of the mission include detailed inspections and surveys of key areas on the surface of Mars.One of the main scientific payloads installed on the orbiter is the moderate resolution camera.Its mission is to image the surface of Mars sufficiently to produce a global remote sensing image map of the planet,and to explore and record changes to the topography of Mars,including major geological structures,and to advance research on topography and geomorphology in general.The moderate resolution camera uses a lightweight and compact integrated design;its primary components are an optical module,a focal plane module,a camera control module,a power and interface module,a camera support module,a thermal control module,and a reference module.Radiometric calibration,color calibration,and geometric calibration have been carried out to ensure that the camera can acquire sufficient accurate data to complete mission goals.This paper introduces the camera's detection mission,its system composition,and its working principle;it also describes the camera's ground calibration tests and their results,and provides a reference for processing the camera's scientific data and for future applications.
文摘Upper stage is an indispensable vehicle in the space transportation system.For its role in multi-satellite transportation area in China,the development of the Yuanzheng 3 upper stage was approved.The article introduces in detail the Yuanzheng 3 upper stage development requirements,task definition and systems as well as main features and performance including payload capacity and insertion accuracy for typical orbits,interfaces with satellites.The article also presents the development cycle of Yuanzheng 3 upper stage,which is divided into 3 stages including concept demonstration stage,prototype stage and flight proof stage.The Yuanzheng 3 upper stage,which will make its maiden flight in 2018,is capable of restarting more than 20 times,and operating for more than 48 hours.It is equivalent to mainstream upper stages in the world in terms of performance,such as restart times,in-orbit operation time,independent digital control system,and adaptable behavior for various tasks.Technologies tackled and accumulated in the development of the Yuanzheng 3 upper stage will lay a solid foundation for the development of future space transportation vehicles.
基金the National Science and Technology Special Projects(grant nos.2021-JCJQ-JJ-0233,23-TQ01-04-ZT-01-017,and D050202)the Fundamental Research Funds for the Central Universities(grant no.NT2022026)National Natural Science Foundation of China(General Program,grant no.52075242)for the funding of this work.
文摘For the needs of manned landing,station construction,and material transfer in future lunar exploration missions,the paper proposes a landing–moving integrated gear(LMIG)for mobile lunar lander(MLL),establishes and optimizes the models of cushioning energy-absorbing and movement planning,respectively,and conducts the prototype tests.First,the design requirements of LMIG are given,and the system composition of LMIG and the configuration design of each subsystem are introduced.Second,the effective energy-absorbing model of the aluminum honeycomb is established and experimentally verified,a three-stage aluminum honeycomb buffer is designed and experimentally verified,and the buffer mechanism of LMIG is verified by simulations under various landing conditions.Furthermore,the kinematic and dynamic models of LMIG are established,the moving gait is designed by the center of gravity trajectory planning method,and the driving trajectory during the stepping process is optimized with the goal of minimal jerk of motion.Finally,a cushioning test prototype and a walking test scaled prototype of LMIG are developed,and single leg drop test and ground walking test are carried out.The results show that the established model of LMIG is reasonable,the designed buffer and gait of LMIG are effective,the developed prototypes of LMIG have good cushioning and movement performance,the LMIG’s maximum value of overload acceleration is 6.5g,and the moving speed is 108 m/h,which meets the design requirements.
基金This research was supported by PetroChina Co Ltd.Science and Technology Major Project(2016E-0612)Ministry of Education(Southwest Petroleum University),Scientific Research Starting Project of SWPU(No.2017QHZ012)+1 种基金Sichuan science and technology program(2019YFG0305,2018GZ0429,2018CC0098)National Research Council of Science and Technology Major Project(2017ZX05023-002).
文摘Intelligent well technology is an oil and gas well optimization completion technology integrated with underground real-time monitoring,data analysis decision-making and remote control of downhole tools.It's of great significance to the transformation and innovation of China's oil and gas development projects.The author of this paper expounds the definition,principle,composition and characteristics of intelligent well technology,and introduces the development status quo of intelligent well technology abroad,including mature intelligent well system,key technology research of intelligent well and its application technology.After the introduction to the related technology research of intelligent well in China,the author puts forward some opinions on the development of our own complete intelligent well system.
