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层序边界的产生

国外油气勘探 1999年第1期11卷 21-29页

作者： nicholas christie-blick Neal W. Driscoll 吴智平史卜庆石油大学(华东)资源系

层序的形成及其特征受多种因素的控制,构造运动、全球海平面变化和沉积物供给的变化在沉积中所扮演的角色很难分开。目前层序地层学一个重要的研究前沿是努力完善对沉积环境和动力背景下控制沉积物搬运和聚集的诸多内部相关因素的认识... 详细信息

层序的形成及其特征受多种因素的控制,构造运动、全球海平面变化和沉积物供给的变化在沉积中所扮演的角色很难分开。目前层序地层学一个重要的研究前沿是努力完善对沉积环境和动力背景下控制沉积物搬运和聚集的诸多内部相关因素的认识。本文对层序地层学中最具争议的问题——层序边界的产生进行了讨论,认为并非所有的层序边界都是由海平面的变化而快速形成的,当海平面变化的速率较小时,层序边界可以通过沉积物逐渐向盆地方向扩展和随后发生的沉积物过路带的埋藏和(或)剥蚀而逐渐形成。此外,本文还对构造活动盆地中层序边界的形成机制及面内作用力在层序边界产生过程中的作用进行了讨论。

关键词：层序边界构造活动盆地沉积作用沉积物地层

PROJECT MANAGEMENT:RECENT DEVELOPMENTS AND RESEARCH OPPORTUNITIES

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Journal of Systems Science and Systems Engineering 2012年第2期21卷 129-143页

作者： nicholas G.HALL Department of Management Sciences Fisher College of Business The Ohio State UniversityUSA

This paper studies the business process known as project management. This process has exhibited a remarkable growth in business interest over the last 15 years, as demonstrated by a 1000% increase in membership in the Project Management Institute since 1996. This growth is largely attributable to the emergence of many new diverse business applications that can be successfully managed as projects. The new applications for project management include IT implementations, research and development, new product and service development, corporate change management, and software development. The characteristics of modem projects are typically very different from those of traditional projects such as construction and engineering, which necessitates the development of new project management techniques. We discuss these recent practical developments. The history of project management methodology is reviewed, from CPM and PERT to the influential modem directions of critical chain project management and agile methods. We identify one important application area for future methodological change as new product and service development. A list of specific research topics within project management is discussed. The conclusions suggest the existence of significant research opportunities within project management.

关键词： Project management overview recent practical developments opportunities for research

The formation of massif anorthosite:Petrology in reverse

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Geoscience Frontiers 2013年第2期4卷 195-198页

作者： nicholas Arndt ISTerre Universite Joseph Fourier:UMR5275CNRS1381 rue de la Piscine38400 St Martin d'HeresFrance

Massif anorthosites form when basaltic magma differentiates in crustal magma chambers to form lowdensity plagioclase and a residual liquid whose density was greater than that of enclosing crustal rocks. The plagioclase and minor pyroxene crystallized in-situ on the floor of the magma chamber to produce the anorthosite complex,and the residual liquid migrated downwards,eventually to solidify as dense Fe-rich cumulates some of which were removed to the *** movements were facilitated by high temperatures in Proterozoic continental crust,thus explaining the restriction of large anorthosite massifs to this period in Earth history.

关键词： Anorthosite Petrology Proterozoic

Composites with high omnidirectional fracture toughness due to helical interlocking fasteners are found in gingko seed shells

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National Science Review 2023年第5期10卷 106-108页

作者： nicholas A.Kotov Department of Chemical Engineering Biointerfaces InstituteDepartment of Materials Science and EngineeringUniversity of Michigan Department of Aeronautics Imperial College London

Engineering of composites mimicking load-bearing materials from living organisms is essential for sustainable economic development and successful resolution of current and future bottle-necks of chemical,automotive,av...

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Longitudinal bicyclist,driver,and pedestrian perceptions of autonomous vehicle communication strategies

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第1期10卷 31-44页

作者： nicholas N.Ferenchak Department of Civil Construction&Environmental EngineeringUniversity of New MexicoAlbuquerqueNM 87131USA

We sought to better understand how autonomous vehicle(AV)communication strategies impact human road users’*** specifically,we explored the impact of different external human-machine interface(eHMI)designs on task load,comfort,trust,and *** accomplish this,we created virtual reality(VR)scenarios where human participants interacted with AVs in biking,driving,and pedestrian *** were brought back after initial testing to explore acclimation and learning *** designs included a text-based grille eHMI,a text-based roof eHMI,a text-based driver-side door eHMI,anon-textual LED windshield strip eHMI,and a non-textual side mirror arrow *** presence of an eHMI was the strongest positive predictor of comfort,trust,and acceptance outcomes in the statistical models when controlling for all other *** was a clear divide between text-based eHMIs and non-text eHMIs with text-based eHMIs experiencing better perception *** LED Windshield experienced the worst perception *** were perception acclimation effects detected which were most notable for task load(which decreased over time)and comfort(which increased over time).Perception scores for the different eHMI designs tended to cluster over ***,the acclimation effects had less of an impact than the presence of an *** outcomes had weaker relationships with participant characteristics than with AV *** suggest that eHMI presence and design,AV behavior,and acclimation are most impactful in terms of perceptions.

关键词： Vehicle automation Communication Human-automation interaction Technology acceptance Virtual reality

Nonlinear Model of Mean Free Surface of Waves

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China Ocean Engineering 1999年第2期14卷 155-162页

作者： nicholas DODD Ph. D. Coastal Group HR Wallingford Howbery Park Wallingford

A nonlinear model of mean free surface of waves or wave set-up is presented. The model is based on that of Roelvink (1993), but the numerical techniques used in the solution are based on the Weighted-Average Flux (WAF) method (Watson el al., 1992), with Time-Operator-Splitting (TOS) used for the treatment of the source terms. This method allows a small number of computational points to be used, and is particularly efficient in modeling wave set-up. The short wave (or primary wave) energy equation is solved by use of a more traditional Lax-Wendroff technique. A nonlinear wave theory (James, 1974) is introduced. The model described in this paper is found to be satisfactory in most respects when compared with the measurements conducted by Stive (1983) except in modeling the mean free surface very close to the mean shoreline.

关键词： mean free surface radiation stress hyperbolic wave theory nonlinear model wave propagation

Do neuronal microvascular activation and resultant dysfunction in rheumatoid arthritis contribute to chronic pain?

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Neural Regeneration Research 2019年第1期14卷 79-81页

作者： nicholas Beazley-Long Arthritis Research UK Pain Centre & School of Life Sciences Medical School University of Nottingham

Microvascular dysfunction and rheumatoid arthritis(RA):Across the UK severe osteoarthritis affects～5–7%and RA affects～1%of the *** are the most common causes of disabling chronic pain and are major burdens on individuals and ***,the annual financial cost to the UK economy for arthritis is in the billions of *** living with painful inflammatory conditions and

关键词：风湿性关节炎机能障碍疼痛激活骨关节炎心血管糖尿病 RA

The Effects of Externally Paced Exercise on Executive Function and Stress in College-Aged Students

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Journal of Science in Sport and Exercise 2023年第2期5卷 149-155页

作者： Peter C.Douris Joseph Cottone Patricia Cruz nicholas Frosos christie Marino Leonard Singamenggala Joshua Shapiro Amber Sousa John P.Handrakis Joanne DiFrancisco‑Donoghue Department of Physical Therapy School of Health ProfessionsNew York Institute of TechnologyOld WestburyNY 11758USA College of Osteopathic Medicine New York Institute of Technology(NYIT)Old WestburyNYUSA VA RR&D National Center for the Medical Consequences of Spinal Cord Injury James J.Peters VA Medical CenterBronxNYUSA

Purpose The purpose of the study was to investigate the acute effect of a beginner martial art class and aerobic exercise on executive function(EF)in college-aged young *** is overwhelming evidence that demonstrates acute as well as long-term aerobic exercise improves ***,there is limited research comparing externally paced exercise(EPE)to self-paced exercise(SPE)such as walking on improving *** requires greater cortical demand than SPE to execute a motor *** Eight men and eight women,aged 24.2±2.8 years,participated in a Repeated Measures Crossover ***-and post-testing of EF with the Stroop and Tower of London(ToL)and stress level were measured after each of the two 1-h conditions:the SPE consisted of a walk(aerobic exercise)and the EPE was a beginner martial art *** There were significant main effects for the martial art class for the Stroop’s mean reaction time for congruent trials(P=0.01)with a large-effect *** mean reaction time for incongruent trials was significant(P=0.05)with a medium-effect *** ToL’s mean solution time(P=0.003)and mean execution time(P=0.002)were also significant with large-effect *** levels were not significantly improved following either *** The martial art class significantly improved all the major domains of EF,while aerobic exercise of a similar intensity did not demonstrate any measured significant *** physiological benefits of physical exercise are well documented;however,the cognitive enhancing capability of EPE should also be appreciated given the results of this study.

关键词： Externally paced exercise Self-paced exercise Cognitive performance Executive function

Analytical model for predicting folding stable state of bistable deployable composite boom

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Chinese Journal of Aeronautics 2024年第8期37卷 460-469页

作者： Tianwei LIU Jiangbo BAI nicholas FANTUZZI School of Transportation Science and Engineering Beihang UniversityBeijing 100191China Jingdezhen Research Institute of Beihang University Jingdezhen 333000China DICAM Department University of BolognaBologna 40136Italy

Bistable Deployable Composite Boom(Bi-DCB)can achieve bistable function by storing and releasing strain energy,which has a good application prospect in space *** example,it serves as the main support section of deployable structures(e.g.,solar arrays and antennas).This paper investigates folding stable state of Bi-DCB through the analytical *** on Archimedes’helix and energy principle,an analytical model for predicting folding stable state of Bi-DCB was *** failure index of Bi-DCB in folding stable state were analyzed using the Tsai-Hill criterion and the maximum stress ***,a 2400 mm long Bi-DCB was fabricated using autoclave *** prediction results of the proposed model were compared with experiments and results of two other analytical *** is shown that the proposed model shows good prediction ***,the effect of geometric parameters on folding stable state of Bi-DCB was further investigated with the aid of the proposed model.

关键词： Bistable Deployable composite boom Solar arrays Antennas Archimedes’helix Folding Failure analysis