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Journal of Rock Mechanics and Geotechnical Engineering 2023年第8期15卷 1931-1943页

作者： Cui Lin D.H.steve Zou Mineral Resource Engineering Dalhousie UniversityHalifaxCanada

Estimation of in situ stresses based on back-analysis of measured stress changes and displacements has become an alternative to the direct stress measurement *** order to help users conduct own measurement and analysis,this paper presents in detail a field stress back-analysis approach directly from borehole strain changes measured during nearby underground *** formulations in major steps and the procedure for the entire analysis process are provided to allow users to *** instrument for borehole strain change measurement can be the CSIR or CSIRO stress cells and other borehole strain cells that can measure strains on borehole *** changes corresponding to the stress changes at a borehole location are calculated in borehole *** stress changes due to nearby excavation can be calculated by an analytical model for a single circular opening and simulated by a numerical model for non-circular and multiple *** models are based on isotropic,homogeneous and linear elastic *** analysis of borehole strain changes is accomplished by multiple linear regression based on error minimization and an integrated process provides the best-fit solution directly to the in situ stresses.A statistical technique is adopted for screening outliers in the measurement data,checking measurement compatibility and evaluating the reliability of analysis *** application example is included to demonstrate the practical application and the analysis procedure.

关键词： In situ stress field Back-analysis Borehole strain change Multiple linear regression Underground excavation Data compatibility Result reliability

The Open Geospatial Consortium Sensor Web PivotViewer: an innovative tool for worldwide sensor web resource discovery

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International Journal of Digital Earth 2014年第9期7卷 761-769页

作者： Chih-Yuan Huang steve Liang Geomatics Engineering University of CalgaryCalgaryCanada

In recent years,large-scale sensor arrays and the vast data-sets they produce worldwide are being utilized,shared,and published by a rising number of researchers on an ever-increasing *** increasing number of sensor web services are deployed to host and share the large volume of sensor data *** to efficiently discover the sensor web resources and visualize different types of sensor data in a coherent environment becomes an important research question that is still not fully *** this paper,we propose the Sensor Web PivotViewer *** integrating the Geospatial Cyberinfrastructure for Environmental Sensing(GeoCENS)cyber infra-structure,the Microsoft PivotViewer,and the Microsoft BingMaps,the proposed system fills in the missing software components for users to easily and intuitively discover and utilize the worldwide sensor web resources.

关键词： worldwide sensor web resource discovery Open Geospatial Consortium

Palaeozoic stromatoporoid futures:A discussion of their taxonomy,mineralogy and applications in palaeoecology and palaeoenvironmental analysis

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Journal of Palaeogeography 2013年第2期2卷 163-182页

作者： steve Kershaw Institute for the Environment Halsbury BuildingBrunel UniversityUxbridgeMiddlesexUB8 3PHUK

Palaeozoic stromatoporoids are calcified sponges common between Middle Ordovician and Late Devonian times in reefs and related *** work is well known,but controversial because of conflict between classification schemes based on the calcareous skeleton versus spicules(which are almost completely lacking in Palaeozoic stromatoporoids);however,lower-level taxonomy(at genus-level) of the calcareous skeleton is considered reliable to be applied in palaeobiological *** of stromatoporoid ecology is poorly developed,such that comprehensive information is available for only a few case studies,in some Silurian and Devonian *** an overall understanding of stromatoporoid responses to environmental conditions has not yet been achieved,although stromatoporoids were likely able to deal with fine grained sediment where they mostly *** stromatoporoid genera have only certain growth forms,so future focus on the use of low-level taxonomy in ecological studies,by comprehensive sampling in high-resolution studies,may establish the relationships between stromatoporoids and their *** organisms and growth banding in stromatoporoids are aspects that have great potential in such *** of stromatoporoids remains poorly *** of their apparent state of preservation(ranging from apparently well-preserved to complete loss of calcareous skeleton features) all stromatoporoids are in fact substantially *** underwent a peculiar diagenesis,whereby the calcareous skeleton and gallery cements of all stromatoporoids are overprinted by irregular elongated calcite crystals arranged normal to the growth laminations,most clearly visible in cross-polarized *** cooccur with mollusc shells that are always either fully recrystallized or dissolved(present as internal and external moulds);this difference means that while molluscs are likely under-represented in the fossil record,stromatoproids

关键词： stromatoporoid Palaeozoic palaeoecology taxonomy biomineralogy *

The Commutator of the Kato Square Root for Second Order Elliptic Operators on R^n

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Acta Mathematica Sinica,English Series 2016年第10期32卷 1121-1144页

作者： Yan Ping CHEN Yong DING steve HOFMANN Department of Applied Mathematics School of Mathematics and PhysicsUniversity of Science and Technology Beijing School of Mathematical Sciences Beijing Normal UniversityLaboratory of Mathematics and Complex Systems(BNU)Ministry of Education Department of Mathematics University of Missouri

Let L = -div（AV） be a second order divergence form elliptic operator, and A be an accretive, n × n matrix with bounded measurable complex coefficients in R^n. We obtain the Lp bounds for the commutator generated by the Kato square root v/L and a Lipschitz function, which recovers a previous result of Calderon, by a different method. In this work, we develop a new theory for the commutators associated to elliptic operators with Lipschitz function. The theory of the commutator with Lipschitz function is distinguished from the analogous elliptic operator theory.

关键词： Commutator Kato square root Lipschitz function elliptic operators

Introduction to Visual Surveillance of Dynamic Scenes

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自动化学报 2003年第3期29卷 319-320页

作者： steve Maybank DepartmentofComputerScience

Building Oracle XML Applications 1st ed.

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Character Animation 2

2000年

作者： steve Muench

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Projecting the global impact of fossil fuel production from the Former Soviet Union

丛书名： Focal Press Visual Effects and Animation

2007年

作者： steve Roberts

ISBN: (纸本)9780240520544

Improve your character animation with a mastery of traditional principles and processes including weight and balance, timing, walks, birds, fish, snakes, four legged animals, acting and lip-synch. Traditional animation skills and techniques are presented in both 2D and 3D space. The companion CD features demonstration animations and exercises conducted in each of the major animation packages including 3ds Max, LightWave, Maya, and XSI Softimage.

关键词： Animation (Cinematography)Handbooks manuals etc.Figure drawingHandbooks etc.Computer animationHandbooks etc.

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International Journal of Coal Science & Technology 2021年第6期8卷 1208-1226页

作者： steve Mohr Jianliang Wang James Ward Damien Giurco The University of Newcastle University DriveCallaghanNSW 2308Australia School of Business Administration China University of PetroleumBeijingChina Engineering and the Environment University of South AustraliaMawson Lakes CampusMawson Lakes BoulevardMawson LakesSA 5095Australia Institute for Sustainable Futures University of Technology SydneyUTS Building 10235 Jones St.UltimoNSW 2007Australia

Detailed projections of the Former Soviet Union(FSU)fossil fuel production has been *** production has been modelled at the region(oblast)level where *** projections were made using the Geologic Resource Supply-Demand Model(GeRS-DeMo).Low,Best Guess and High scenarios were *** fossil fuels are projected to peak between 2027 and 2087 with the range due to spread of Ultimately Recoverable Resources(URR)values *** Best Guess(BG)scenario anticipates FSU will peak in 2087 with production over 170 EJ per *** FSU projections were combined with rest of the world projections(Mohr et al.2015b),the emissions from the High scenario for the world are similar to the IPCC A1 AIM scenario.

关键词： Former Soviet Union Fossil Fuel Production Fossil Fuel Projection

Urological Emergencies at the University Hospital of Brazzaville: Epidemiological, Clinical, and Therapeutic Aspects

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Open Journal of Urology 2024年第5期14卷 333-345页

作者： Roland Bertile Banga-Mouss Yannick Dimi Nyanga Irène Ondima Armel Melvin Atipo Ondongo steve Aristide Ondziel-Opara Joseph Junior Damba Nick Arnaud Monabeka Christ Ondzé Daniella Gloire Ngassiele Gidmard Onguele Henock Songa Jetsvy Mayala Anani Wensels Severin Odzebe Prosper Alain Bouya Departement of Urology and Andrology University Hospital of Brazzaville Brazzaville Republic of the Congo

Introduction: Urological emergencies play a significant role in the medical and surgical activity of a urology department. The objective of this study was to determine the hospital prevalence of urological emergencies at the University Hospital of Brazzaville (CHUB), identify the different pathologies requiring urgent care, and list the various therapeutic methods. Patients and methods: A retrospective study of patients admitted to the medical and surgical emergencies department of CHUB over a 5-year period. Patient records admitted and treated for a urological emergency were included. The variables studied were the frequency of urological emergencies, patient age at admission, gender, nature of the emergency, and various therapeutic options. Results: Urological emergencies accounted for 4.3% of all medical and surgical emergencies. The mean age was 57 ± 28 years with a range of 3 to 93 years. The male-to-female ratio was 7.1. The most common conditions were urinary retention (54.67%), hematuria (17.20%), and renal colic (8.13%). Therapeutically, surgical urinary drainage was dominated by cystostomy. Conclusion: Urological emergencies are infrequent at the University Hospital of Brazzaville. Their management is often delayed.

关键词： Urological Emergencies Urinary Retention Hematuria Renal Colic

Compacted graphite iron-A material solution for modern diesel engine cylinder blocks and heads

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China Foundry 2009年第3期6卷 241-246页

作者： steve Dawson SinterCast Sweden

The demands for improved fuel economy,performance and emissions continue to pose challenges for engine designers and the materials they choose. This is particularly true for modern diesel engines,where the primary path to achieving improved engine performance and emissions is to increase the Peak Firing Pressure in the combustion chamber. The resulting increase in thermal and mechanical loading has required a change from conventional grey cast iron to Compacted Graphite Iron (CGI) in order to satisfy durability requirements without increasing the size or the weight of the engines. With at least 75% higher tensile strength,45% higher stiffness and approximately double the fatigue strength of conventional grey cast iron,CGI satisfies durability requirements and also provides the dimensional stability required to meet emissions legislation throughout the life of the engine. Currently,there are no CGI diesel engines running on the roads in North America. This is set to change considerably as new commercial vehicle and pick-up SUV diesel engines are launched with CGI cylinder blocks in 2008 and 2009. These initial programs will provide over 2 million CGI diesel engines when ramped to mature volume,potentially accounting for 10%-15% of the North American passenger vehicle fleet within the next four years.

关键词： compacted graphite iron modern diesel engine performance emission cylinder blocks and heads