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Long-Term Impacts of Tree Architectures and Branch Configurations on Tree Growth, Yield, Fruit Quality Attributes, and Leaf Minerals in “Aztec Fuji” Apple
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作者 Esmaeil Fallahi Michael Jason Kiester Bahar Fallahi 《American Journal of Plant Sciences》 CAS 2024年第9期796-810,共15页
Canopy and branch architectures in high-density orchards can be crucial in production and fruit quality. The influence of two canopy orientations (Upright and Tilted) in combination with two arm (branch) architectures... Canopy and branch architectures in high-density orchards can be crucial in production and fruit quality. The influence of two canopy orientations (Upright and Tilted) in combination with two arm (branch) architectures (Shortened or Overlapped) on tree growth, yield components, fruit quality, and leaf mineral nutrients in an “Aztec Fuji” apple (Malus domestica Bork.) high-density orchard was studied over five years. Tilted trees with shortened arm configuration (TilShArm) always had significantly larger trunk cross-sectional area (TCSA) than Upright trees with an Overlapped arm configuration (UpOverArm) every year from 2012 to 2016. Trees with a TilShArm system had more cumulative fruit per tree than those with an Upright orientation. Trees with a tilted canopy (TilShArm and TilOverArm) tended to have higher yield per tree and yield per hectare than those with an upright system. Trees with a TilShArm system were more precocious and had more yield per tree than those with an upright canopy orientation in 2012. When values were polled over five years, trees with an upright canopy-shortened arm system (UpShArm) treatment had a lower biennial bearing index (BBI) than those with an upright canopy-overlapped system (UpOverArm). Trees receiving an arm shortening (UpShArm or TilShArm) configuration often had larger fruits than those with overlapped arms (UpOverArm and TilOverArm). Fruit from trees receiving an UpOverArm had higher fruit firmness than those from trees with other canopy-branch arrangements at harvest due to their smaller size. Fruit from trees with a TilShArm and TilOverArm had significantly higher water core and bitter pit but lower sunburn than trees with an upright canopy (UpShArm and UpOverArm). Leaves from trees with an UpOverArm canopy-branch configuration had the lowest leaf Ca but the highest leaf K and Fe concentrations among all treatments. 展开更多
关键词 Branch Training High-Density Orchard Quality Attributes Tree architecture
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Interacted Effect of Arbuscular Mycorrhizal Fungi and Polyamines on Root System Architecture of Citrus Seedlings 被引量:3
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作者 WU Qiang-sheng ZOU Ying-ning +1 位作者 LIU Chun-yan LU Ting 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2012年第10期1675-1681,共7页
Either arbuscular mycorrhizal fungi (AMF) or polyamines (PAs) may change root system architecture (RSA) of plants, whereas the interaction of AMF and PAs on RSA remains unclear. In the present study, we studied ... Either arbuscular mycorrhizal fungi (AMF) or polyamines (PAs) may change root system architecture (RSA) of plants, whereas the interaction of AMF and PAs on RSA remains unclear. In the present study, we studied the interaction between AMF (Paraglomus occultum) and exogenous PAs, including putrescine (Put), spermidine (Spd) and spermine (Spin) on mycorrhizal development of different parts of root system, plant growth, RSA and carbohydrate concentrations of 6-m-old citrus (Citrus tangerine Hort. ex Tanaka) seedlings. After 14 wk of PAs application, PA-treated mycorrhizal seedlings exhibited better mycorrhizal colonization and numbers of vesicles, arbuscules, and entry points, and the best mycorrhizal status of taproot, first-, second-, and third-order lateral roots was respectively found in mycorrhizal seedlings supplied with Put, Spd and Spm, suggesting that PAs might act as a regulated factor of mycorrhizal development through transformation of root sucrose more into glucose for sustaining mycorrhizal development. AMF usually notably increases RSA traits (taproot length, total length, average diameter, projected area, surface area, volume, and number of first-, second-, and third-order lateral roots) of only PA-treated seedlings. Among the three PA species, greater positive effects on RSA change and plant biomass increment of the seedlings generally rank as Spd〉Spm〉Put, irrespective of whether or not AMF colonization. PAs significantly changed the RSA traits in mycorrhizal but not in non-mycorrhizal seedlings. It suggests that the application of PAs (especially Spd) to AMF plants would optimize RSA of citrus seedlings, thus increasing plant growth (shoot and root dry weight). 展开更多
关键词 CITRUS lateral root MYCORRHIZA PUTRESCINE root system architecture SPERMIDINE SPERmine
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Enterprise Information System Architecture Based on Web 2.0 被引量:1
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作者 YI Xiushuang WANG Yu +1 位作者 LIU Jinghong WEN Zhankao 《Wuhan University Journal of Natural Sciences》 CAS 2006年第5期1398-1402,共5页
Enterprise information systems with a great use of Web 2.0 technologies will be more open, free, and more efficient. With the contrast between classic Web technologies and Web 2.0 technologies, we represent a sample o... Enterprise information systems with a great use of Web 2.0 technologies will be more open, free, and more efficient. With the contrast between classic Web technologies and Web 2.0 technologies, we represent a sample of enterprise information system based on Web 2.0, and show how the use of Web 2. 0 technologies changes the system data exchange model of the enterprise information systems and how it improves the efficiency and effectiveness of information systems. 展开更多
关键词 Web 2. 0 information system architecture
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Architecture and application of integrated spatial information service platform for digital mine 被引量:2
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作者 ZHANG Jin1, XIAO Jie2 1. College of Mining, Taiyuan University of Technology, Taiyuan 030024, China 2. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China 《中国有色金属学会会刊:英文版》 CSCD 2011年第S3期706-711,共6页
Using enterprise GIS platform, spatial databases and modern information technology, building geo-spatial information service platform of digital mine which has the features of the data exchange service, enterprise GIS... Using enterprise GIS platform, spatial databases and modern information technology, building geo-spatial information service platform of digital mine which has the features of the data exchange service, enterprise GIS services, directory services, logging services, is key technology and application infrastructure for digital mine. Based on the support of geospatial information service platform of digital mine, the professional GIS application service adapter can be developed and the application supports related to mining application system can be realized. Using high-resolution satellite remote sensing data, the mine functional partition map and geographic grids can be divided, and the geographic grid parts, status and events of important features of the surface object were investigated and defined. The system architecture and technical characteristics of integrated spatial information service platform were analyzed firstly, which guarantee service ability of digital mine. The methods and applications of functional partition map for integrated management service platform were discussed which are the services scheme of digital mine. The application results indicated that digital mine upgrades and enhances the capability and range of mine surveying and mapping, and is of great significance for guarantee of efficient, green and intensive exploitation of mine. 展开更多
关键词 PLATFORM architecture web SERVICES application SERVICES DIGITAL mine
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Developing architecture of a traveler information system for dynamic equilibrium in traffic networks 被引量:1
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作者 Mohammad Hossein Noranian Ahmad Reza Tahsiri 《Journal of Modern Transportation》 2017年第2期106-115,共10页
Having criticized the current architecture of Advanced Traveler Information Systems (ATISs), this work discusses a new base of requirements to develop a new paradigm for traffic information systems. It mainly integr... Having criticized the current architecture of Advanced Traveler Information Systems (ATISs), this work discusses a new base of requirements to develop a new paradigm for traffic information systems. It mainly integrates three dimensions within a traffic system: drivers' pattern of behavior and preferences, urban traffic desires, and capabilities of traffic information service providers. Based on the above, functional segments from several related backgrounds are brought together to structure a new architecture, called Interactive Traveler Information System (ITIS). The main interactive feature of this new architecture is a two-way communication track between drivers and the traffic information system provider-in fact, a decision on choosing a road at a particular time for an individual will be made based on the utility of both sides. This new configuration consists of driver-side smartphone application, centric traffic prediction, and decision-maker units, which will shape a new approach of decision-making processes. These all work together to satisfy the designated goal of ITIS, which is preserving the Wardrop equilibrium condition in the traffic network level. Finally, we concentrate on a comparison study, which shows a differentiation between performance of the proposed ITIS and the current ATIS model in a real situation. This has been done with simulations of analogical scenarios. The most noticeable advantage of the proposed architecture is not being limited to a saturation limit, and the positive effect of increasing system penetration in the performance of the newly introduced information system. In conclusion, new research subjects are suggested to be carried out. 展开更多
关键词 Advanced Traveler information system (ATIS) system architecture Requirement engineering Mobile network Dynamic equilibrium - Intelligent transportation system
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Hierarchical Architecture for Enterprise Information System under Dynamic Environment
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作者 TIAN Chun-hua, CHAI Yue-ting, LIU Yi (Department of Automation, Tsinghua University, Beijing 100084, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期224-225,共2页
In a dynamic environment, it is vital for enterpris e to have flexible information system architecture to integrate ERP, Supply Chain Management (SCM) and E-Commerce (EC). The traditional systems are established o n t... In a dynamic environment, it is vital for enterpris e to have flexible information system architecture to integrate ERP, Supply Chain Management (SCM) and E-Commerce (EC). The traditional systems are established o n the ERP-centered flat architecture. This architecture has some disadvantages in supporting the dynamics of enterprises. Firstly, ERP is already a very expens ive and complex system; the extension based on it can only increase the complexi ty and make the implementation more expensive and risky. Secondly, under the arc hitecture, the flexibility is reduced sharply although the execution efficiency is maintained. In a rapid changing environment, flexibility is also an equally i mportant factor besides execution efficiency. Thirdly, it cannot support the dyn amic collaboration efficiently. The prevailing of the flat architecture is not d ue to its advantage but to the big software providers. From the system viewpoint , a hierarchical architecture is proposed. Difference from the current architect ure, in the hierarchical paradigm, ERP is put in the bottom level rather centere d. SCM is the center system, which adopts a multi-agent structure. EC is regard ed as its foreground interface, while ERP and other information system of the pa rtner or internal units are the background executors. EC is the extension of mar ket agent and purchase agent. It fulfills the function of trade on Internet by s ending orders to be executed to SCM and receiving the progress information of th e orders from SCM. After receiving orders from EC, the agent in charge of schedu le in SCM makes preliminary plan in form of instructions (which may be infeasibl e) based on the information of source. Trough the coordination of multi agent, the plan is adjusted to be feasible. Compared with current ERP-centered flat ar chitecture, the hierarchical structure pays more attention to dynamic collaborat ion rather the optimization within the enterprise. At last, two engineering case s, Beijing Shang Pu Electric Ltd and Qingtao Tianyue International Building Mate rial Free Trade City, are presented to illustrate the idea. 展开更多
关键词 ERP Supply Chain Management E-COMMERCE Multi -Agent system information system architecture
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Modeling the dynamic alignment of business and information systems via the lens of human-centered architecture evolution
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作者 ZHANG Mengmeng YI Shuanghui +3 位作者 CHEN Honghui LUO Aimin LIU Junxian ZHANG Xiaoxue 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2021年第4期881-888,共8页
The complexity of business and information systems(IS)alignment is a growing concern for researchers and practitioners alike.The extant research on alignment architecture fails to consider the human viewpoint,which ma... The complexity of business and information systems(IS)alignment is a growing concern for researchers and practitioners alike.The extant research on alignment architecture fails to consider the human viewpoint,which makes it difficult to embrace emergent complexity.This paper contributes to the extant literature in the following ways.First,we combine an enterprise architecture(EA)framework with a human viewpoint to address alignment issues in the architecture design phase;second,we describe a dynamic alignment model by developing a humancentered meta-model that explains first-and second-order changes and their effects on alignment evolution.This paper provides better support for the theoretical research and the practical application of dynamic alignment. 展开更多
关键词 business and information systems(IS)alignment human viewpoint enterprise architecture(EA) META-MODEL dynamic alignment
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A Quarter Century of Work to Revolutionize Architecture, Engineering and Construction Enterprise Information Systems
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作者 Alain Zarli Patrice Poyet 《Journal of Civil Engineering and Architecture》 2017年第8期715-735,共21页
More than two decades ago, object-oriented representation of AEC (architecture engineering and construction) projects started to offer the promise of seamless communication of semantic data models between computer-b... More than two decades ago, object-oriented representation of AEC (architecture engineering and construction) projects started to offer the promise of seamless communication of semantic data models between computer-based systems used from the design stage to the operation of the facilities. BIM (building information modelling) emerged and appeared as a means to store all relevant data generated during the life-cycle of the facilities. But this upstream view of the built environment, arising from the design and construction stages, extended to the downstream operations where building and industrial facilities appeared more and more as huge dynamic data producers and concentrators while being operated. This created new challenges leading to what is referred to as ISCs (intelligent and smart constructions). The current state of the art is that final constructions still contain various and increasingly versatile control and service systems, which are hardly standardised, and not interconnected among themselves. Monitoring, maintenance and services are done by specialised companies, each responsible of different systems, which are relying on customised software and techniques to meet specific user needs and are based on monolithic applications that require manual configuration for specific uses, maintenance and support. We demonstrate in this paper that the early promises of integration across the actors and along the life-time of facilities have gone a long way but will only be delivered through enhanced standardisation of computerized models, representations, services and operations still not yet fully accomplished 25 years after work started. 展开更多
关键词 architecture engineering and construction building information models semantic interoperability intelligent and smart built environment information systems and sensors for new services.
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A management information system for mine railway transportation equipment
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作者 LI Mei-yu HAN Ke-qi +3 位作者 ZHANG Xiao-yong LI Xiao-lin ZHAI Yong-jun YU Wei-hu 《Journal of China University of Mining and Technology》 EI 2008年第3期373-376,共4页
Good equipment management is essential for the day to day management of an enterprise. Targeted at production opera-tion of the railway transportation department of a mining group and aimed at mine railway equipment m... Good equipment management is essential for the day to day management of an enterprise. Targeted at production opera-tion of the railway transportation department of a mining group and aimed at mine railway equipment management, we have estab-lished a management information system for the equipment in the entire process of the life cycle of equipment. The project deals with basic data about equipment, initial management, maintenance, operation and even disposal, based on a C/S and B/S structure. We adopted an object-oriented approach, dealing with software engineering, information engineering, economic and organizational measures. Thus, effective monitoring and control of the operation of railway equipment and its status in the entire process has been achieved. 展开更多
关键词 mine railway transportation equipment management information system
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Coalmine Safety Assurance Information System Based on GIS 被引量:1
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作者 刘桥喜 毛善君 +2 位作者 马蔼乃 毛允德 鲍庆国 《Journal of China University of Mining and Technology》 2003年第2期204-209,共6页
The mine ventilation and safety is one of the most important factors to influence on the coal production.More attention has been paid to manage safety information in scientific, efficient, and real-time way. Therefore... The mine ventilation and safety is one of the most important factors to influence on the coal production.More attention has been paid to manage safety information in scientific, efficient, and real-time way. Therefore, it is important to develop a practical mine safety assurance information system (CSAIS). Based on analyzing the actual management mode for ventilation and safety on mine, the paper studies the structure and function of the mine safety assurance information system based on GIS in detail. Moreover, it also suggests some applications and solutions. By combining with the practical situation, the paper realizes the whole function of the present system. 展开更多
关键词 GIS SAFETY information sharing online analytical processing (OLAP) coal mine
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An Improved PAC Architecture for Shop Floor Information System in Digital Manufacturing 被引量:2
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作者 SHAHID Ikramullah Butt 《Computer Aided Drafting,Design and Manufacturing》 2005年第2期56-60,共5页
In order to overcome the weakness of the former production activity control (PAC) architecture, this paper presents an improved PAC architecture. The BIT-PAC architecture has been applied with the use of information... In order to overcome the weakness of the former production activity control (PAC) architecture, this paper presents an improved PAC architecture. The BIT-PAC architecture has been applied with the use of information technology. It facilitates the information flow from Shop Floor to other areas of the organization and makes the organizations more integrated and productive. This architecture also facilitates the expansion of the Shop Floor functions without disturbing the basic infrastructure. Effectiveness of the BIT-PAC architecture was checked by developing and running application software on a network PC which has supported the dynamic flow of information from Sub-Producers and Sub-Movers to other areas of organization. 展开更多
关键词 digital manufacturing production activity control shop floor control shop floor information system.
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Study on Information System Architecture Based on Service-Dominant Logic
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作者 Juhua Wu Meng Xu +1 位作者 Zan Mo Nuo Liao 《Intelligent Information Management》 2015年第2期53-58,共6页
As goods-dominant logic lexicon transitions to service-dominant logic, based on the knowledge and structure dimensions of IT and business alignment, combined with the IT flexible, we design information system architec... As goods-dominant logic lexicon transitions to service-dominant logic, based on the knowledge and structure dimensions of IT and business alignment, combined with the IT flexible, we design information system architecture diagram of y group. We try to solve y group functionality and data misfit domains, aligning information system and business in operational level to response to changes in the environment. 展开更多
关键词 Service-Dominant LOGIC IT and BUSINESS ALIGNMENT system architecture
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APPLICATION OF IMPROVED PRODUCTION ACTIVITY CONTROL ARCHITECTURE FOR SHOP FLOOR INFORMATION SYSTEM IN DIGITAL MANUFACTURING
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作者 SHAHID Ikramullah Butt 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第4期483-486,共4页
Shop floor control (SFC) is responsible for the coordination and control of the manufacturing physical and information flow within the shop floor in the manufacturing system. Weaknesses of the production activity co... Shop floor control (SFC) is responsible for the coordination and control of the manufacturing physical and information flow within the shop floor in the manufacturing system. Weaknesses of the production activity control (PAC) architecture of the shop floor are addressed by the Maglica's new system architecture. This architecture gives rise to unlimited number of movers and producers thus evolving more complex but decentralized architecture. Beijing Institute of Technology - production activity control (BIT-PAC) architecture introduces an idea of sub-producars and sub-movers thus reducing the complexity of the architecture. All the equipments including sub-producars and sub-movers are considered to be passive in the proposed shop floor information system. The dissemination of information from sub-producers and sub-movers is done manually through a PC. Proposed BIT-PAC SFC architecture facilitates the information flow from shop floor to the other area of the organization. Effective use of interact information services (IIS) and SQL2000 is done along with the ASP.NET technology to implement the application logic. Applicability of the software based on BIT-PAC architecture is checked by running application software on a network PC that supports the dynamic flow of information from sub-producers and sub-movers to the other parts of the organization. Use of software is also shown at the end for BIT training workshop thus supporting the use of SFC architecture for similar kind of environments. 展开更多
关键词 Shop floor information system (SFIS) Production activity control(PAC)Shop floor control(SFC) Digital manufacturing
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Information System/Information Technology Strategic Planning in Order Information Technology Development Strategy Using TOGAF (The Open Group Architecture Framework) Methodology in Achieving World Class University in Satya Wacana Christian University
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作者 Augie David Manuputty Agustinus Fritz Wijaya 《Intelligent Information Management》 2013年第6期175-181,共7页
Information systems and information technology (IS/IT) play an important role in supporting the organization to conduct its business processes. The research was conducted at the University of Satya Christian Wacana (S... Information systems and information technology (IS/IT) play an important role in supporting the organization to conduct its business processes. The research was conducted at the University of Satya Christian Wacana (SWCU). Business processes in perceived walking SWCU are not optimal in using IS/IT in the organization. The planning process/IT has not been done in all business units and SWCU does not have an Executive Information System that can help in the decision making process. The process of strategic planning of information systems and information technology using The Open Group Architecture Framework (TOGAF) has compiled a few methods of strategic planning. The results obtained by the study of the needs of IS/IT in SWCU generating application portfolio will be implemented in the institution. 展开更多
关键词 information systems information TECHNOLOGY Strategic Planning World Class UNIVERSITY TOGAF
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Hydrothermal Synthesis and Luminescent Properties of Flowerlike Zn_2GeO_4 and Mn^(2+)-Doped Zn_2GeO_4 Hierarchical Architectures 被引量:1
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作者 LI Bo SONG Shu-yan +3 位作者 SUN Xiu-juan PENG Jing WANG Bo XING Yan 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第5期764-767,共4页
Three-dimensional(3D) flowerlike hierarchical Zn2GeO4 and Mn2+-doped Zn2GeO4 microstructures have been prepared by a facile hydrothermal approach. X-Ray diffraction(XRD), field emission scanning electron micro-sc... Three-dimensional(3D) flowerlike hierarchical Zn2GeO4 and Mn2+-doped Zn2GeO4 microstructures have been prepared by a facile hydrothermal approach. X-Ray diffraction(XRD), field emission scanning electron micro-scopy(FESEM), transmission electron microscopy(TEM) and photoluminescence(PL) spectrometry were employed to characterize the samples. Such flowerlike hierarchical Zn2GeO4 microstructures with an average diameter of 3―4 μm were found to be constructed by abundant single crystalline nanorods of about 90 nm in diameter. The luminescent properties of Zn2GeO4:xMn phosphors with different contents of Mn2+ as an activator were investigated. The Mn2+-doped samples showed green luminescence corresponding to the d-d transition of Mn2+ under the irradiation of UV light. The red shift(from 531 nm to 538 nm) in λem with increasing Mn2+ content was observed in the luminescent spectra, which should be attributed to a weak crystal field because of the substitution of Zn2+ by Mn2+ at a distorted tetrahedral lattice site. 展开更多
关键词 Zinc orthogermanate Hierarchical architecture Luminescent property
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Research on Information Architecture Design of Short-Form Video Social Platforms Based on Cognitive Psychology
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作者 Zhengyang Liu Albert Young Choi 《Psychology Research》 2024年第1期1-13,共13页
This study investigates how cognitive psychology principles can be integrated into the information architecture design of short-form video platforms,like TikTok,to enhance user experience,engagement,and sharing.Using ... This study investigates how cognitive psychology principles can be integrated into the information architecture design of short-form video platforms,like TikTok,to enhance user experience,engagement,and sharing.Using a questionnaire,it explores TikTok users’habits and preferences,highlighting how social media fatigue(SMF)impacts their interaction with the platform.The paper offers strategies to optimize TikTok’s design.It suggests refining the organizational system using principles like chunking,schema theory,and working memory capacity.Additionally,it proposes incorporating shopping features within TikTok’s interface to personalize product suggestions and enable monetization for influencers and content creators.Furthermore,the study underlines the need to consider gender differences and user preferences in improving TikTok’s sharing features,recommending streamlined and customizable sharing options,collaborative sharing,and a system to acknowledge sharing milestones.Aiming to strengthen social connections and increase sharing likelihood,this research provides insights into enhancing information architecture for short-form video platforms,contributing to their growth and success. 展开更多
关键词 information architecture design short-form video social cognitive psychology user experience
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An OGC standard-oriented architecture for distributed coal mine map services 被引量:5
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作者 SONG Xian-feng RUI Xiao-ping +1 位作者 HOU Wei TAN Hai-qiao 《Journal of China University of Mining and Technology》 EI 2008年第3期381-385,共5页
GIS- or CAD-based technology has been widely used for cartographic maps in coal mines, but structural gaps between such maps make it difficult to provide an integrated map service, for any specific purpose, at higher ... GIS- or CAD-based technology has been widely used for cartographic maps in coal mines, but structural gaps between such maps make it difficult to provide an integrated map service, for any specific purpose, at higher levels. There is no uniform platform that can be used to manage all involved maps. The main reason for this is that datasets are submitted by individual coal mines using their individual, diverse software. No consistent model is used within the software for data abstraction and symbolization. This paper first reviews all the essential specifications concerning OGC (Open Geospatial Consortium) interoperability. Then an OGC standard-oriented architecture is proposed to provide distributed coal mine map services. Within this new architecture the management of spatial data archives, and the integration of coal mine maps, are achieved through the interfaces of geospatial services. Finally an open source geospatial approach is suggested to implement the proposed scheme. A case study of the Huaibei Coal Group is used to demonstrate the proposal. 展开更多
关键词 coal mine map services service oriented architecture OGC interoperability specifications open source geospatial solution
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Properties of Self-recoverable Mechanoluminescence Phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) and Its Information Encryption Application
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作者 ZHANG Ting WANG Zhijun +3 位作者 WANG Dawei ZHAO Jinxin YANG Zhiping LI Panlai 《发光学报》 EI CAS CSCD 北大核心 2024年第9期1445-1455,共11页
A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)... A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)∶Eu^(3+)can produce red mechanoluminescence,and importantly,it shows good repeatability.The mechanoluminescence of Ca_(5)Ga_(6)O_(14)∶Eu^(3+) results from the piezoelectric field generated inside the material under stress,rather than the charge carriers stored in the traps,which can be confirmed by the multiple cycles of mechanoluminescence tests and heat treatment tests.The mechanoluminescence color can be turned from red to green by co-doping varied concentrations of Tb^(3+),which may be meaningful for encrypted letter writing.The encryption scheme for secure communication was devised by harnessing mechanoluminescence patterns in diverse shapes and ASCII codes,which shows good encryption performance.The results suggest that the mechanoluminescence phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+),Tb^(3+)may be applied to the optical information encryption. 展开更多
关键词 PHOSPHOR MECHANOLUmineSCENCE self-recoverable information encryption
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Sedimentary architecture of submarine channel-lobe systems under different seafloor topography:Insights from the Rovuma Basin offshore East Africa
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作者 Mei Chen Sheng-He Wu +6 位作者 Rui-Feng Wang Jia-Jia Zhang Peng-Fei Xie Min Wang Xiao-Feng Wang Ji-Tao Yu Qi-Cong Xiong 《Petroleum Science》 SCIE EI CAS CSCD 2024年第1期125-142,共18页
Seafloor topography plays an important role in the evolution of submarine lobes.However,it is still not so clear how the shape of slope affects the three-dimensional(3-D)architecture of submarine lobes.In this study,w... Seafloor topography plays an important role in the evolution of submarine lobes.However,it is still not so clear how the shape of slope affects the three-dimensional(3-D)architecture of submarine lobes.In this study,we analyze the effect of topography factors on different hierarchical lobe architectures that formed during Pliocene to Quaternary in the Rovuma Basin offshore East Africa.We characterize the shape,size and growth pattern of different hierarchical lobe architectures using 3-D seismic data.We find that the relief of the topographic slope determines the location of preferential deposition of lobe complexes and single lobes.When the topography is irregular and presents topographic lows,lobe complexes first infill these depressions.Single lobes are deposited preferentially at positions with higher longitudinal(i.e.across-slope)slope gradients.As the longitudinal slope becomes higher,the aspect ratio of the single lobes increases.Lateral(i.e.along-slope)topography does not seem to have a strong influence on the shape of single lobe,but it seems to affect the overlap of single lobes.When the lateral slope gradient is relatively high,the single lobes tend to have a larger overlap surface.Furthermore,as the average of lateral slope and longitudinal slope gets greater,the width/thickness ratio of the single lobe is smaller,i.e.sediments tend to accumulate vertically.The results demonstrate that the shape of slopes more comprehensively influences the 3-D architecture of lobes in natural deep-sea systems than previously other lobe deposits and analogue experiments,which helps us better understand the development and evolution of the distal parts of turbidite systems. 展开更多
关键词 Submarine fan Seafloor topography Sedimentary architecture Slope system SW Indian ocean
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Software Architecture for Modeling and Simulation of Underwater Acoustic Information Systems
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作者 王希敏 蔡志明 《Defence Technology(防务技术)》 SCIE EI CAS 2009年第1期52-59,共8页
The simulation of underwater acoustic information flow is an important way to research sonar performance and its engagement effectiveness in the ocean environment.This paper analyzes the significance of modeling an op... The simulation of underwater acoustic information flow is an important way to research sonar performance and its engagement effectiveness in the ocean environment.This paper analyzes the significance of modeling an open and sophisticated simulation software architecture by object-oriented method,and introduces the modeling processes and expression method of simulation architecture.According to the requirements of simulation system and the underwater acoustic information flow,the logical architecture of simulation software system is modeled by the object-oriented method.A use-case view captured the system requirements.The logical view shows the logical architecture of software system.The simulation software is decomposed into the loose coupling constituent parts by layering and partitioning the packages for maintainability.The design patterns enabled the simulation software to have good expansibility and reusability.The simulation system involving multi-targets and multi-sonar is developed based on the architecture model.Practices show that the model meets the needs for simulating an open and sophisticated system. 展开更多
关键词 体系结构建模 软件体系结构 仿真系统 信息系统 水下 逻辑结构 面向对象 软件系统
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