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Robust mismatched filtering algorithm for passive bistatic radar using worst-case performance optimization Research Articles
Gang Chen, Jun Wang,chengang_xidian@163.com,wangjun@xidian.edu.cn
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 7, Pages 963-1118 doi: 10.1631/FITEE.1900150
Keywords： 外辐射源雷达；距离副峰；低信噪比；失配滤波；最差性能最优
Microseismic monitoring technology
Tang Chunhua,Gu Guangqing
Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 95-99
Microseismic (MS) monitoring is a hot topic in the applied geophysics recently. The MS mechanism and histories are introduced firstly in this article, and then the instruction of the MS equipment such as acquisition strategies, optimal sensors, array design, digital-signal processing, event location, velocity calibration, and monitoring deployment, is discussed. MS is a great technology with a long future, and we need to foster the understanding and acceptance of this technology.
Keywords： microseismic monitoring hydraulic fracturing oil and natural gas SNR (signal to noise ratio) event location
Strategic thinking for developing low-carbon economy in “Three Gorges Area”
Wang Yingluo,Zhang Guoxing,Guo Ju’e
Strategic Study of CAE 2010, Volume 12, Issue 8, Pages 4-7
The richness and stable condition of migrants, the construction of ecological environment and the harmonious development of socio-economy in Three Gorges is an important problem in post Three Gorges. It's regretful that there are some contradictions exist in the man-land relations, employment and ecological problems in the reservoir area now, which leads to the necessity to protect the ecological environment following a low-carbon development. Firstly, we suggest develop low-carbon tourism industry which means to plan the tourism resources effectively, cultivate low-carbon tourism industry groups, create low-carbon transport corridors, and market special products in the reservoir area. Secondly, we suggest develop low-carbon farm aptly and set up a domestic carbon trading market. Finally, it's necessary to build a low carbon living system in the reservoir area, and make the Three Gorges area to an exemplary low-carbon area in China.
Keywords： ecological environment low carbon economy low carbon tourism low carbon living
The present and future of low permeability oil and gas in China
Hu Wenrui
Strategic Study of CAE 2009, Volume 11, Issue 8, Pages 29-37
Low permeability oil and gas resource of China is abundant and has a great potential of exploration and development. Great exploration discoveries in low permeability sandstone, marine carbonate and volcanic rock fields were acquired and top international matching development technology in low permeability was created. Scale effective development in low permeability oil and gas reservoir was achieved. Oil and gas production in low permeability reservoir increased continuously and the proportion in production components is increasing yearly. New proved reserves and remaining oil and gas reserves considered, low permeability oil and gas resource is the main objects of exploration and development in future. Low permeability resources are the mainstream of exploration and development in China oil and gas industry and have an immense strategic importance for nation energy security.
Keywords： low permeability oil and gas exploration and development mainstream present and future technology
Micro-seismic signal propagation of low attenuation
Xiao Jian,Sun Shuting,Liu Jianzhong
Strategic Study of CAE 2014, Volume 16, Issue 8, Pages 83-87
This article explored the possibility of spread of weak seismic signals and low attenuation. The results showed that both underground seismic signal propagation medium showed a degree of elasticity，the vibration signal amplitude，just below the elastic limit attenuation is very small，showing low attenuation characteristics. This feature ensures that on the ground，and even the loess coverage area of micro seismic signal detected.
Keywords： micro-seismic low attenuation inelastic attenuation
Understanding and thinking on the low-carbon development
Fu Zhihuan,Niu Tianying
Strategic Study of CAE 2010, Volume 12, Issue 6, Pages 12-17
Climate change has being brought disaster to all humankind,while low-carbon development has been necessary and urgent. This paper analyzed the development measures of low-carbon economy taken by developed and developing countries,and proved that China has made great efforts on energy conservation,emission reduction, and development of low-carbon economy.According to the article,it is a reasonable way to solve climate change problem that we should adhere to the principles of common but differentiated responsibilities and the responsibility of states assigned by cumulative emissions per capita. Because of some practical reasons in home and abroad, our country must take low-carbon development road,although there are many constraints of low-carbon economy development in China. This paper put forward a lot of suggestion on China's development of low-carbon economy, and emphasized proper "development philosophy" as the guide to meet the challenges of low-carbon development.
Keywords： low carbon economy climatic change cumulative emissions per capita development concept
Low Sulfur Low Olefin Gasoline Production By RIDOS Technology
Li Dadong,Shi Yahua,Yang Qingyu
Strategic Study of CAE 2004, Volume 6, Issue 4, Pages 1-8
By analysis of the component and structure of real high olefinic FCC naphtha, a technology of deep desulfurization and olefin saturation with minimal octane loss is developed, which is named RIDOS. The multifunctions of RIDOS technology are achieved by using a series of new catalysts, which show the good feed adaptability and operation flexibility. The results of the first commercial RIDOS unit show that an ultra-low sulfur (w(S)＜ 10 /μg/g), low olefins gasoline (φo＜20%) is produced, while the road octane number loses only 1.3 unit. RIDOS technology provides the possibility for producing the clean fuels meeting most strict specifications.
Keywords： FCC naphtha RIDOS olefin sulfur isomerization
A Realization to Enhance the Signal Noise Ratio With Superposition on the Same Phase Signal
Han Xiuting,Wang Jiechun,Jiao Zhenqaing,Gao Fei,Song Yubo
Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 64-68
This paper talks about method to enhance vibration signals gotten by hitting iron pipe to cause a vibrating response from which the damaged pipe information will be found. However, the reflection wave is usually too weak to acquire useful information correctly. The method, in which mccltiple similar signals are superposed, can not only decrease the noise in the signal, but also receive more message that may be lost before because of the interval of sample collection. Since the noise in signals could be treated as white noise, after multiple superposition the added noise will become to zero. The programmed the software to performs efficiently and conveniently. There are some examples in practice to express that this method is correct.
Keywords： vibrating wave reflection wave signal enhancement software for superposition signal
China’s scientific, green and low carbon energy strategy
Du Xiangwan,Zhou Dadi
Strategic Study of CAE 2011, Volume 13, Issue 6, Pages 4-10
This article first analyzes the strategic trend of energy development in the world, and the current situation, problems and challenges of energy in China. Then it proposes the guiding thought and principles for China's mid-long term development strategy of energy, emphasizing that a new energy strategy with Chinese characteristics must incorporate the Scientific Outlook on Development and it will secure the rational demand by scientific supply. The article defines the strategic position of different development stages of China's energy in the first half of the 21st century, and sets forth the basic content of "China's scientific, green and low carbon energy strategy" and its 6 sub-strategies. The sub-strategies include: a.to strengthen the strategy of "saving first with control of the total" , introducing a concept of "ceiling" for the consumption of coal and oil; b.to explore coal in a scientific way and to use it in clean and high efficient way and to adjust its position in China's energy strategy, introducing the concepts of "Scientific Producing Capacity of Coal" and "Degree of Clean Use of Coal" ; c.to secure the strategic pillar position of oil and natural gas, taking natural gas as one of the key points in adjusting the energy composition; d.to actively develop hydro power and non-hydro renewable energy, developing them into one of the green pillars to China's energy; e.to actively develop nuclear energy taking it as a strategic choice for the sustainable development of China's energy; f.to develop highly efficient, safe, and smart grid system adoptable to multi-power sources characterized in China, and to develop off-grid power using and energy-storage technologies. "China's scientific, green and low carbon energy strategy" is an economy and environment "win-win" strategy, constituting an important part in the national strategy addressing the climate change. As the implementation of "China's scientific, green and low carbon energy strategy" requires strong support of science and technology, the article proposes 3 levels of support by science and technology. It also gives the perspective of the development of energy in China in the first half of 21st century. Finally, it proposes several critical suggestions to the implementation of the above strategy.
Keywords： China’s energy mid-long term development strategy green and low carbon
Low carbon scenario and technologies in modern city——Case study of Shenyang City
Liu Zhu,Geng Yong ,Xue Bing,Dong Huijuan
Strategic Study of CAE 2011, Volume 13, Issue 4, Pages 101-105
Taking a multi dimensional perspective of economic development, carbon dioxide,industrial pollutant emission and resource consumption in the case study of Shenyang City, the resource consumption and environmental impact in the process of urban economic development and low carbon transition were analyzed. The emission reduction potential and scenario of various technologies were evaluated. The results showed that the city played a key role in global low-carbon economic construction, and emission reduction technologies in urban scale can reduce total amount of carbon emission in substantial degree. From the aspect of future development, the input of technology and economic growth pattern should be strengthened to realize economic development and total amount reduction of pollutant emission.
Keywords： modern city low carbon emission reduction technology
Discussions and practice of pressurized water injection for ultra low permeability oilfield
Zhang Hongliang
Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 62-64
Ultra low permeability formations in outer area of Daqing western is characterized by deeply buried, thin, and sand scattered. Note that first waterflood in such formation where water contained capability is poor and it's difficult to recovery oil efficiently, this paper describes pilot studies of pressurized water injection on single well to ensure effective waterflood drive and achieve goal of “sufficient water injected and implementation well” on the basis of thorough theoretical study and many demonstration. After injection completion, effective waterflood drive and significant production improvement was achieved.Use of passive seismic monitoring and isotope logging has increased water contained capabilities, eased the complexity contradiction between layers, and improved reservoir effectiveness. Water injection front drive and spread area increases or decreases, following changes of pressure of water injection. Pressurized water injection can increase coefficient of water injection front drive and enhance oil recovery, improve development efficiency of ultra low permeability reservoir,it provides a reference for development of ultra low permeability oilfield.
Keywords： pressurized waterflood passive microseismic ultra low permeable oilfield affected coefficient effective injection drive
Natural gas is an important stage and trend of energy low carbonization development
Hu Jianyi,Guo Bincheng
Strategic Study of CAE 2011, Volume 13, Issue 4, Pages 9-14
Along with the economic and technological development, fossil energy resources have developed from low efficiency to high efficiency, from high carbon to low carbon. Energy resources substitution will be a long process of transition from an era when fossil energy resources are the main part to another period when new energy resources develop rapidly. Natural gas, which is characteristic of immense resource including conventional and unconventional resources and high reserve-production ratio, has become the significant development moment of low carbon fossil energy resources, and will also become the first energy resource. The utilization of natural gas, which is rather low carbon among fossil energy resources, has given rise to great attention and discussion around the world and natural gas will become the bridge to realize energy resources low carbonization. Natural gas is also new energy resource in China, and has great potential for further development.
Keywords： natural gas low carbon fossil energy
Dynamic relationship analysis among parties of the low-carbon building
Liu Hongyong,Zheng Junwei,Lin Cheng
Strategic Study of CAE 2012, Volume 14, Issue 12, Pages 94-99
According to the definition of academic circles about low carbon building, the definition of this paper are made from the special aspect and general aspect combined with the understanding of the energy saving building and low carbon building. It systematically analyzes the stakeholders based on the perspective of life cycle, including government, developer, design organization, construction organization, provider, consultation unit, technology development institution, evaluation testing institution, department of property management and public, puts forward to the diagram of the relationships among the stakeholders, and designs the causal dynamic relationship diagram about each stage, which are decision making stage, design stage, construction stage, operation stage and scrap processing stage, and analyzes the dynamic relationship among the parties.
Keywords： low-carbon building stakeholders causal relation diagram dynamic analysis
Low Carbonization System Engineering for Automobiles in China
Zhang Xiaoyan,Wang Yongjun,Li Jun and Fu Lei
Strategic Study of CAE 2018, Volume 20, Issue 1, Pages 23-29 doi: 10.15302/J-SSCAE-2018.01.004
To realize the commitment toward reducing CO2 emission made in the Paris Agreement, the automotive industry in China must lower its CO2 emission and contribute toward low carbonization. We have created a prediction model for CO2 emission from automobiles based on the architecture of low carbonization systems for automobiles, current emission situation within the automobile life cycle, and the sales prediction for 2030 in China. Using this model, the total CO2 emission of automobiles in China was predicted for 2030; we also analyzed the CO2 emission of the automobiles with respect to the total amount of CO2 emission in China. An evaluation system has also been set up for low CO2 emission from automobiles in China, and comprehensive suggestions for a low-carbon technology roadmap in China are also presented in this paper.
Keywords： low carbonization fuel consumption regulation automobile technology life cycle technology roadmap
Zeng Lianbo,Liu Hongtao,Fang Baocai,Deng Haicheng
Strategic Study of CAE 2004, Volume 6, Issue 11, Pages 73-79
The Putaohua reservoir in Taizhao area is the typical low-permeability reservoir which developed EW, SN, NW and NE tectonic fractures with high angles in the periphery of Daqing Oilfield. The development degree of above four group fractures in succession die down. By effect of modern stress field of approximately EW direction, the connectedness, opening and permeability of EW fractures are the best, then are NW and NE fractures, and that of SN fractures are the worst. The development degree of fractures are controlled by lithology, thickness, fault and tectonic stress. The effects of fractures on development include pattern arrangement, injecting water and fracturing. According to geological condition and numerical simulation of oil pool, the development effects of similar low-permeability reservoirs by rectangle and lozenge well pattern are better than by inverted 9-spot well pattern and 5-spot well pattern. Due to development of fractures in low-permeability, the stratum cracking pressure reduces, which is liable to be exceeded by the injecting pressure. This will make injecting water to flow fleetly along fractures, and cause water flooding, influenceing development effect. Therefore, it is very important to control injecting pressure in the development of low-permesability reservoirs. The artificial fractures are controlled by the modern stress field and natural fractures in fractured low-permeability reservoir. According to fractures and their seepage characteristics, three sets of adjustment schemes can be adopted on the basis of existing inverted 9-spot well pattern. At the same time, good effects can be obtained by early mild injecting water, controlling injecting pressure, linearity injecting mode, dynamic preparing water, pulse cycle injecting, perfecting pour and pick system, well pattern adjustment, choosing fracturing well and controlling fracturing scale, etc.
Keywords： fracture low-permeability reservoir development countermeasure
Title Author Date Type Operation
Robust mismatched filtering algorithm for passive bistatic radar using worst-case performance optimization
Gang Chen, Jun Wang,chengang_xidian@163.com,wangjun@xidian.edu.cn
Journal Article
Strategic thinking for developing low-carbon economy in “Three Gorges Area”
Wang Yingluo,Zhang Guoxing,Guo Ju’e
Journal Article
Micro-seismic signal propagation of low attenuation
Xiao Jian,Sun Shuting,Liu Jianzhong
Journal Article
Low Sulfur Low Olefin Gasoline Production By RIDOS Technology
Li Dadong,Shi Yahua,Yang Qingyu
Journal Article
A Realization to Enhance the Signal Noise Ratio With Superposition on the Same Phase Signal
Han Xiuting,Wang Jiechun,Jiao Zhenqaing,Gao Fei,Song Yubo
Journal Article
Low carbon scenario and technologies in modern city——Case study of Shenyang City
Liu Zhu,Geng Yong ,Xue Bing,Dong Huijuan
Journal Article
Discussions and practice of pressurized water injection for ultra low permeability oilfield
Zhang Hongliang
Journal Article
Natural gas is an important stage and trend of energy low carbonization development
Hu Jianyi,Guo Bincheng
Journal Article
Dynamic relationship analysis among parties of the low-carbon building
Liu Hongyong,Zheng Junwei,Lin Cheng
Journal Article
Low Carbonization System Engineering for Automobiles in China
Zhang Xiaoyan,Wang Yongjun,Li Jun and Fu Lei
Journal Article
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