polar flow的問題,透過圖書和論文來找解法和答案更準確安心。 我們找到下列股價、配息、目標價等股票新聞資訊

polar flow的問題,我們搜遍了碩博士論文和台灣出版的書籍,推薦蕭華,蒲金標寫的 航空氣象學【2022年版】 和的 Storied Doctorates: Studying Environmental Sustainability Education Internationally都 可以從中找到所需的評價。

另外網站Probuds v2 troubleshooting - New Home也說明:Polar Flow app and compatible devices If you're using an older Polar product (Polar Loop 2, Loop Crystal, A300, M400, M460, V650 or V800), Jul 19, ...

這兩本書分別來自秀威資訊 和所出版 。

國立陽明交通大學 機械工程系所 吳宗信所指導 林育宏的 低腔壓高濃度過氧化氫混合式火箭引擎之研究 (2021),提出polar flow關鍵因素是什麼,來自於混合式火箭引擎、渦漩注入式燃燒室、高濃度過氧化氫、聚丙烯、推力控制、低腔壓、深度節流、前瞻火箭研究中心。

而第二篇論文國立臺北科技大學 土木工程系土木與防災碩士班 陳彥璋所指導 蕭武賢的 應用HHT於水位自動資料檢核系統 (2021),提出因為有 希爾伯特-黃轉換、整體經驗模態分解法、希爾伯特轉換、品管檢核的重點而找出了 polar flow的解答。

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接下來讓我們看這些論文和書籍都說些什麼吧:

除了polar flow,大家也想知道這些:

航空氣象學【2022年版】

為了解決polar flow的問題,作者蕭華,蒲金標 這樣論述:

  航空氣象學屬於應用氣象學之範疇,其主要任務在於保障飛航安全,提高飛航效率。   在實務上著重於利用適當的天氣條件,避開惡劣的天氣,使飛機順利完成飛行任務。   本書編修者蒲金標 博士為航空氣象學權威,在民航局實際從事航空氣象工作三十六年,參與民用航空局航空氣象現代化系統計畫,先後架設松山和台灣桃園國際機場低空風切警告系統,並建置航空氣象服務網站。2008年在民航局飛航服務總台副總台長退休後,繼續從事研究以氣壓跳動與機場低空亂流之相關性,並於2017年8月在松山機場架設一套松山機場低空亂流警告系統,對台灣飛航有許多重要貢獻。   本書所有各種天氣報告及天氣預報之內容次

序及傳播程序等,均依照世界氣象組織(WMO)國際航空氣象服務(Meteorological Service for International Air Navigation. WMO Technical Regulations Vol.Ⅱ)以及國際民航組織(ICAO)國際民航公約第三號附約(ANNEX 3 to the convention on international civil aviation)之各項共同準則,符合目前航空氣象服務之國際規定。   本書計分三篇,各篇均自成系統,可獨立參考閱讀。第一篇論述飛航氣象基本要素,含物理學之理論研究以及各要素之應用於航空方面;第二篇討論影響飛

航安全之天氣,詳細討論可能危害飛航之情況及應付迴避之方法。第三篇敘述航空氣象服務,略述航空氣象機構、業務及工作技術內容等。適用於「航空氣象學」課程,也可當作高考、民航、升職等考試、軍官轉任民航特考與學科項目入門用書。 本書特色   ✓航空氣象學權威、前民航局飛航服務總台副總台長蕭華&蒲金標專業撰寫,最新編修!   ✓完整收錄航空氣象學之基本理論及各項公式,課程/考試必備用書!   ✓全面介紹航空科學、天氣觀測、飛航安全、航空氣象服務,掌握上榜關鍵!   ✓全台各地航空氣象機構之工作技術內容詳實說明,理論與應用並重!   ✓附天氣報告電碼&天氣預報電碼,編碼、填圖、天氣分析一次到位!  

低腔壓高濃度過氧化氫混合式火箭引擎之研究

為了解決polar flow的問題,作者林育宏 這樣論述:

本論文為混合式火箭系統入軌段火箭引擎的前期研究,除了高引擎效率的要求外,更需要精準的推力控制與降低入軌段火箭的結構重量比,以增加入軌精度與酬載能力。混合式火箭引擎具相對安全、綠色環保、可推力控制、管路簡單、低成本等優點,並且可以輕易地達到引擎深度節流推力控制,對於僅能單次使用、需要精準進入軌道的入軌段火箭推進系統有相當大的應用潛力。其最大的優點是燃料在常溫下為固態、易保存且安全,即使燃燒室或儲存槽受損,固態的燃料也不會因此產生劇烈的燃燒而導致爆炸。雖然混合式推進系統有不少優於固態及液態推進系統的特性,相較事先預混燃料與氧化劑的固態推進系統及可精準控制氧燃比而達到高度燃燒效率的液態推進系統,混

合式推進系統有擴散焰邊界層燃燒特性,此因素導致混合式推進系統的燃料燃燒速率普遍偏低,使得設計大推力引擎設計時需要長度較長的燃燒室來提供足夠的燃料燃燒表面積,也導致得更高長徑比的火箭設計。針對此問題,本論文利用渦漩注入氧化劑的方式,增加了氧化劑在引擎內部的滯留時間,並藉由渦旋流場提升氧化劑與燃料的混合效率以及燃料耗蝕率;同時降低引擎燃燒室工作壓力以研究其推進效能,並與較高工作壓力進行比較。本論文使用氮氣加壓供流系統驅動90%高濃度過氧化氫 (high-test peroxide) 進入觸媒床,並使用三氧化二鋁 (Al2O3) 為載體的三氧化二錳 (Mn2O3) 觸媒進行催化分解,隨後以渦漩注入的

方式注入燃燒腔,並與燃料聚丙烯(polypropylene, PP)進行燃燒,最後經由石墨鐘形噴嘴 (bell-shaped nozzle) 噴出燃燒腔後產生推力。實驗部分首先透過深度節流測試先針對原版腔壓40 barA引擎在低腔壓下的氧燃比 (O/F ratio)、特徵速度 (C*)、比衝值 (Isp) 等引擎性能進行研究,提供後續設計20 barA低腔壓引擎的依據,並整理出觸媒床等壓損以及燃燒室等流速的引擎設計轉換模型;同時使用CFD模擬驗證渦漩注射器於氧化劑全流量下 (425 g/s) 的壓損與等壓損轉換模型預測的數值接近 (~1.3 bar)。由腔壓20 barA 引擎的8秒hot-f

ire實驗結果顯示,由於推力係數 (CF) 在低腔壓引擎的理論值 (~1.4) 相較於腔壓40 barA引擎的推力係數理論值 (~1.5) 較低,因此腔壓20 barA引擎的海平面Isp相較於腔壓40 barA引擎的Isp 低了約13 s,但是兩組引擎具有相近的Isp效率 (~94%),且長時間的24秒hot-fire測試顯示Isp效率會因長時間燃燒而提升至97%。此外,氧化劑流量皆線性正比於推力與腔壓,判定係數 (R2) 也高於99%,實現混合式火箭引擎推力控制的優異性能。透過燃料耗蝕率與氧通量之關係式可知,低腔壓引擎在相同氧化劑通量下 (100 kg/m2s) 較腔壓40 barA引擎降低

了約15%的燃料耗蝕率,因此引擎的燃料耗蝕率會受到腔體壓力轉換的影響而變動,本論文也針對此現象歸納出一校正方法以預測不同腔壓下的燃料耗蝕率,此校正後的關係式可提供未來不同腔壓引擎燃料長度設計上的準則。最後將雙氧水貯存瓶的上游氮氣加壓壓力從約58 barA降低至38 barA並進行8秒hot-fire測試,結果顯示仍能得到與過往測試相當接近的Isp效率 (~94%),而此特性除了能讓雙氧水及氮氣貯存瓶擁有輕量化設計的可能性,搭配具流量控制的控制閥也有利於未來箭體朝向blowdown type型式的設計,因此雙氧水加壓桶槽上的氮氣調壓閥 (N2 pressure regulator valve)

將可省去,得以降低供流系統的重量,並增加箭體的酬載能力,對於未來箭體輕量化將是一大優勢。

Storied Doctorates: Studying Environmental Sustainability Education Internationally

為了解決polar flow的問題,作者 這樣論述:

María Xypaki is an award-winning higher education professional. She is currently the Curriculum and Public Engagement Consultant at University College London and a Teaching Fellow of the Higher Education Academy (UK). Her roles involve enhancing student experience and academic practice by leading on

the development of cross-institutional projects and services. She has extensively advised on the development of higher education curricula to embed sustainability and inclusivity considerations. Maria’s most recent research interests revolve around Community Engaged Learning and knowledge co-creati

on with a focus on underrepresented communities. Maria has led on various national and international educational projects and initiatives. She is about to embark on her Research EdD journey at the Institute of Education (IoE), UCL. Publications include: Xypaki, M. (2015). An innovative model of stud

ent-led sustainability in higher education. In Integrating Sustainability Thinking in Science and Engineering Curricula (pp. 473-495). Springerlink International Publishing. Switzerland. Xypaki, M. (2016). A practical example of integrating sustainable development into higher education: Green Dragon

s, City University London Students’ Union. Local Economy, 30(3), 316-329. Maria has extensively presented her work in international and national conferences.Eleni Sinakou is a doctoral researcher in the FWO project ’Valorizing Integrated and Action-oriented Education for Sustainable Development’ at

the Edubron Research Unit in the department of Education and Training Sciences at the University of Antwerp, Belgium. Her research interests lie in the fields of Environmental Education/Education for Sustainable Development. Her doctoral thesis focuses on the teaching practices in Environmental Educ

ation/Education for Sustainable Development of teachers in elementary as well as secondary school. In particular, the thesis aims to determine which teaching practice could develop students’ action competence in the framework of Environmental Education/Education for Sustainable Development. Eleni Si

nakou is also a fellow of the Alexander S. Onassis Public Benefit Foundation, Greece. Articles by Eleni Sinakou have been published in Journal of Cleaner Production, in Environment, Development and Sustainability Journal and in Sustainability. María Angélica Mejía-Cáceres is doctor in Science and He

alth Education of the Federal University of Rio de Janeiro, Brazil. She was a visiting research student in The Sustainability Education Research Institution (SERI) at University of Saskatchewan, Canada. She has a Masters in Education with Emphasis teaching science at the University del Valle, a spec

ialization in Social Management of the Pontificia Universidad Javeriana, and a Bachelor in Basic Education with Emphasis in Natural Sciences and Environmental Education at University del Valle in Cali, Colombia. Her last publication in journals is about Social actors’ representation and ideologies f

rom a critical discourse analysis, and about analysis of the National Policy of Environmental Education of Colombia. Author of the book "Science, Culture and Environmental Education: a proposal for educators" (2018) in co-authorship with Alfonso Zambrano. And the compiler of the book "Weaving Relati

ons Between Science Education and Environmental Education in Scenarios of Teacher Training: A Critical and Cultural Approach, in co-compilership with Edwin Garcia and Laisa Freire, currently in the process of editing by the editorial program.Ailim Schwambach developed her PhD research (Universidade

Federal do Rio Grande do Sul) and did her sandwich PhD at UCL, England. Currently she works as High School teacher at Instituto Ivoti, in Brazil and also works as a mentor of Environmental Education projects for teachers. Ailim is the Education and Outreach Coordinator of APECS- Brazil (Association

of Polar Early Career Scientists). She was the Brazilian Delegate at COP 21 from UNFCCC (United Nations Framework Convention on Climate Change) - Conference of Parties in France, Paris. Ailim has an interest in environmental education and gender discussions. She has created a project to make young p

eople read more and improve their skills and abilities on Science in Brazil. Author of the book: Education for sustainability: epistemological bases, theories and examples in the area of Business Administration (2017).Elsa Lee is an educationalist with an interdisciplinary focus and an interest in e

nvironmental and sustainability education, climate change education and place-based learning. She spent ten years teaching science at secondary schools in the UK and Mexico before returning to university for further study. Since completing her doctorate in 2013 she has worked on a number of research

council funded research projects seeking to understand human relationships with/in the natural world and their behaviour towards the environment and how this intersects with education. Elsa has used ethnographic research techniques widely, including walking interviews and arts-based research method

s. Elsa’s teaching at undergraduate and masters level brings together these different foci to support students’ explorations of sustainability-related work in Education. Elsa is a founding member and convenor of the Environmental and Sustainability Education Research Network for the European Confere

nce on Educational Research and a trustee and deputy director of the charity: National Association of Environmental Education. Recent publications include: Lee, E., Vare, P. and Finlayson, A. (2020) The Ebb and Flow of ESD in the UK. In GREEN SCHOOLS GLOBALLY: Stories of impact on education for sust

ainable. (2020). SPRINGER NATURE.; Irvine, R. D. G., & Lee, E. (2018). Over and under: Children navigating terrain in the East Anglian fenlands. Children’s Geographies, 16(4), 380-392. Lee, E., Walshe, N., Sapsed, R., & Holland, J. (2018). Artists as Emplaced Pedagogues: How Does Thinking About Chil

dren’s Nature Relations Influence Pedagogy? In R. Latiner Raby & E. J. Valeau (Eds), Handbook of Comparative Studies on Community Colleges and Global Counterparts (pp. 1-24). Springer International Publishing.

應用HHT於水位自動資料檢核系統

為了解決polar flow的問題,作者蕭武賢 這樣論述:

臺灣地區河川水位變化頻繁,由於水位資料需要現地監測取得,但現地可能有各種狀況,如儀器故障、傳輸異常及人為疏失等干擾,皆會影響其數據真實性,因此原始資料必須先執行品管檢核程序,將異常且不合理數據過濾排除,以利提供於水文研究分析較準確之數據使用。本研究所建立之自動化檢核程序利用希爾伯特-黃轉換(Hilbert-Huang ransform, HHT)達到檢核之目標,此方法為黃鍔博士於2009年所提出之時頻分析法,將訊號進行拆解並且分析各自瞬時頻率與振幅能量之相互關係。首先使用整體經驗模態分解法(Ensemble Empirical Mode Decomposition, EEMD)進行拆解,瞭解

此訊號之組成要素因子,為有限個本質模態函數(Intrinsic Mode Functions, IMF)以及一個剩餘函數(residual),為達到辨識出異常值特徵,因此需最大程度表現出水位變化之突波(spike)與異常值的IMF分量,故而僅選擇第一個IMF分量進行希爾博伯特轉換(Hilbert Transform, HT),轉換後可取得其時間-振幅能量關係圖,觀察該分量之振幅起伏對應真實水位情況,可知道其異常值之振幅數值,當振幅數值越大就可能有異常值出現,反之則為趨向合理情況,藉由觀察各點之振幅數值大小,設定一閥值作為過濾異常值之判斷依據,將超過閥值的點位過濾並排除,而選定閥值大小能控制品管

檢核結果,故可調節不同閥值進一步左右篩選結果,以此達到自動化檢核水位資料之目的。本研究使用傳統人工品管檢核作為標準取得該閥值,利用此閥值完成自動化檢核之最終篩選依據。為降低人工檢核時之人為因子影響結果,故而選定以與人工品管檢核結果約95%相似,若較保守設定其閥值,可盡量避免破壞原始數據之真實物理意義,篩選結束後仍可使用人工檢查確保其數據正確。依據品管檢核的結果得知,可發現自動化檢核可篩選出幾乎全部的異常值,將人工觀察到之明顯突波異常值,能盡量過濾剃除,並且對篩選結果以線性內插進行資料補遺,讓水位資料以連續且完整狀態呈現。自動化檢核程序相比人工檢核程序,能縮短檢核時間且節省檢核人員精力,提供更為

穩定運作之水位品管檢核程序,亦可更為靈活地根據不同篩選需求調整過濾門檻。