In order to reduce the volume and weight of phase array antenna in RF frequency, an integrated technology of multi-channel transceiver circuit and power division network in microwave is proposed for the tile type TR m...In order to reduce the volume and weight of phase array antenna in RF frequency, an integrated technology of multi-channel transceiver circuit and power division network in microwave is proposed for the tile type TR module. The component is integrated in a same dielectric substrate, the mounting interface of chips and power division network are on the same layer. Finally, a 8 × 8 array has been manufactured and tested to validate its function. The results show the integrated technology has good performance. It is very good to satisfy the miniaturization and lightweight of the T/R module in the active phased array antenna.展开更多
To construct a giant Sichuan gas province,it is in an urgent need of exploring new replacement areas with abundant natural gas resources and great exploration potential.In this paper,the formation conditions(e.g.sourc...To construct a giant Sichuan gas province,it is in an urgent need of exploring new replacement areas with abundant natural gas resources and great exploration potential.In this paper,the formation conditions(e.g.source rock,reservoir and play)and the distribution laws of the deep-seated old giant marine carbonate oil/gasfields in China's Craton Basins were investigated systematically.Then,the accumulation and enrichment conditions of deep Sinian natural gas in the Sichuan Basin were analyzed.Finally,potential and favorable target zones of natural gas exploration in the Dengying Formation of Upper Sinian were evaluated.And the following research results were obtained.Firstly,the effec-tiveness and scale of source kitchens,reservoirs and reservoirecaprock assemblages and the proximity are the necessary conditions for the formation of deep-seated giant carbonate oil/gasfields,and paleo-uplifts,paleo-slopes and paleo-fault zones are the favorable areas of searching deep-seated giant carbonate oil/gasfields.Secondly,in the Sichuan Basin,three sets of high-quality source rocks are developed in the NeoproterozoiceCambrian System,and their maturity of organic matter is still in the optimal window for cracking gas,so the gas generation scale is large.Thirdly,after the microbial carbonate rocks of Dengying Formation in the Sichuan Basin were reconstructed by constructive diagenesis,effective reservoirs are formed and distributed widely.Fourthly,owing to the integrated source rocks and cap rocks of Dengying Formation,the marginal platform and the intra platform have favorable conditions for proximal hydrocarbon accumulation.In conclusion,the deep Sinian in the Sichuan Basin has good conditions of hydrocarbon accumulation and it is an important replacement area of natural gas exploration.Paleo-uplifts and slopes in the central Sichuan Basin have been the favorable locations of natural gas accumulation for a long period.Large-scale exploration shall focus on four favorable areas,including the marginal platform zone in the fourth member of Dengying Formation,the marginal platform zone in the second member of Dengying Formation,the bioherm shoalbody of Dengying Formation intra platform in the paleo-uplifts and slopes of the central Sichuan Basin,and the bioherm shoalbody of Dengying Formation in the eastern Sichuan Basin.展开更多
Software is becoming the driving force in today’s mechatronic systems. It does not only realize a significant part of their functionality but it is also used to realize their most competitive advantages. However, the...Software is becoming the driving force in today’s mechatronic systems. It does not only realize a significant part of their functionality but it is also used to realize their most competitive advantages. However, the traditional development process is wholly inappropriate for the development of these systems that impose a tighter coupling of software with electronics and mechanics. In this paper, a synergistic integration of the constituent parts of mechatronic systems, i.e. mechanical, electronic and software is proposed though the 3+1 SysML view-model. SysML is used to specify the cen-tral view-model of the mechatronic system while the other three views are for the different disciplines involved. The widely used in software engineering V-model is extended to address the requirements set by the 3+1 SysML view-model and the Model Integrated Mechatronics (MIM) paradigm. A SysML profile is described to facilitate the application of the proposed view-model in the development of mechatronic systems.展开更多
Mode-division multiplexing（MDM） has become an increasingly important technology to further increase the transmission capacity of both optical-fiber-based communication networks, data centers and waveguidebased on-ch...Mode-division multiplexing（MDM） has become an increasingly important technology to further increase the transmission capacity of both optical-fiber-based communication networks, data centers and waveguidebased on-chip optical interconnects. Mode manipulation devices are indispensable in MDM system and have been widely studied in fiber, planar lightwave circuits, and silicon and InP based platforms. InP-based integration technology provides the easiest accessibility to bring together the functions of laser sources, modulators, and mode manipulation devices into a single chip, making it a promising solution for fully integrated few-mode transmitters in the MDM system. This paper reviews the recent progress in InP-based mode manipulation devices, including the few-mode converters, multiplexers, demultiplexers, and transmitters. The working principle, structures, and performance of InP-based few-mode devices are discussed.展开更多
By the standard integral averaging technique, we obtain some oscillation criteria for a second order functional neutral differential equation. Our results are more general than those in B. Baculíková, J. Dzu...By the standard integral averaging technique, we obtain some oscillation criteria for a second order functional neutral differential equation. Our results are more general than those in B. Baculíková, J. Dzurina [2]. An example is provided to illustrate the relevance of our theorems.展开更多
文摘In order to reduce the volume and weight of phase array antenna in RF frequency, an integrated technology of multi-channel transceiver circuit and power division network in microwave is proposed for the tile type TR module. The component is integrated in a same dielectric substrate, the mounting interface of chips and power division network are on the same layer. Finally, a 8 × 8 array has been manufactured and tested to validate its function. The results show the integrated technology has good performance. It is very good to satisfy the miniaturization and lightweight of the T/R module in the active phased array antenna.
基金supported by the National Major Science and Technology Project"Hydrocarbon accumulation,key techniques and target evaluation of carbon-ate rocks in Lower Paleozoic-Pre-Cambrian"(No.2016ZX05004).
文摘To construct a giant Sichuan gas province,it is in an urgent need of exploring new replacement areas with abundant natural gas resources and great exploration potential.In this paper,the formation conditions(e.g.source rock,reservoir and play)and the distribution laws of the deep-seated old giant marine carbonate oil/gasfields in China's Craton Basins were investigated systematically.Then,the accumulation and enrichment conditions of deep Sinian natural gas in the Sichuan Basin were analyzed.Finally,potential and favorable target zones of natural gas exploration in the Dengying Formation of Upper Sinian were evaluated.And the following research results were obtained.Firstly,the effec-tiveness and scale of source kitchens,reservoirs and reservoirecaprock assemblages and the proximity are the necessary conditions for the formation of deep-seated giant carbonate oil/gasfields,and paleo-uplifts,paleo-slopes and paleo-fault zones are the favorable areas of searching deep-seated giant carbonate oil/gasfields.Secondly,in the Sichuan Basin,three sets of high-quality source rocks are developed in the NeoproterozoiceCambrian System,and their maturity of organic matter is still in the optimal window for cracking gas,so the gas generation scale is large.Thirdly,after the microbial carbonate rocks of Dengying Formation in the Sichuan Basin were reconstructed by constructive diagenesis,effective reservoirs are formed and distributed widely.Fourthly,owing to the integrated source rocks and cap rocks of Dengying Formation,the marginal platform and the intra platform have favorable conditions for proximal hydrocarbon accumulation.In conclusion,the deep Sinian in the Sichuan Basin has good conditions of hydrocarbon accumulation and it is an important replacement area of natural gas exploration.Paleo-uplifts and slopes in the central Sichuan Basin have been the favorable locations of natural gas accumulation for a long period.Large-scale exploration shall focus on four favorable areas,including the marginal platform zone in the fourth member of Dengying Formation,the marginal platform zone in the second member of Dengying Formation,the bioherm shoalbody of Dengying Formation intra platform in the paleo-uplifts and slopes of the central Sichuan Basin,and the bioherm shoalbody of Dengying Formation in the eastern Sichuan Basin.
文摘Software is becoming the driving force in today’s mechatronic systems. It does not only realize a significant part of their functionality but it is also used to realize their most competitive advantages. However, the traditional development process is wholly inappropriate for the development of these systems that impose a tighter coupling of software with electronics and mechanics. In this paper, a synergistic integration of the constituent parts of mechatronic systems, i.e. mechanical, electronic and software is proposed though the 3+1 SysML view-model. SysML is used to specify the cen-tral view-model of the mechatronic system while the other three views are for the different disciplines involved. The widely used in software engineering V-model is extended to address the requirements set by the 3+1 SysML view-model and the Model Integrated Mechatronics (MIM) paradigm. A SysML profile is described to facilitate the application of the proposed view-model in the development of mechatronic systems.
基金Project supported by the State Key Development Program for Basic Research of China(No.2014CB340102)the National Key Research&Development(R&D)Plan(No.2016YFB0402301)the National Natural Science Foundation of China(No.61335009)
文摘Mode-division multiplexing（MDM） has become an increasingly important technology to further increase the transmission capacity of both optical-fiber-based communication networks, data centers and waveguidebased on-chip optical interconnects. Mode manipulation devices are indispensable in MDM system and have been widely studied in fiber, planar lightwave circuits, and silicon and InP based platforms. InP-based integration technology provides the easiest accessibility to bring together the functions of laser sources, modulators, and mode manipulation devices into a single chip, making it a promising solution for fully integrated few-mode transmitters in the MDM system. This paper reviews the recent progress in InP-based mode manipulation devices, including the few-mode converters, multiplexers, demultiplexers, and transmitters. The working principle, structures, and performance of InP-based few-mode devices are discussed.
基金partially supported by the NNSF of China (Grant 11171178 and 11271225)Science and Technology Project of High Schools of Shandong Province (Grant J12LI52)Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province
文摘By the standard integral averaging technique, we obtain some oscillation criteria for a second order functional neutral differential equation. Our results are more general than those in B. Baculíková, J. Dzurina [2]. An example is provided to illustrate the relevance of our theorems.
