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Strength from the Waters: A History of Indigenous Mobilization in Northwest Mexico

為了解決Hydraulic system的問題，作者Mestaz, James V. 這樣論述：

Strength from the Waters is an environmental and social history that frames economic development, environmental concerns, and Indigenous mobilization within the context of a timeless issue: access to water. Between 1927 and 1970 the Mayo people--an Indigenous group in northwestern Mexico--confron

ted changing access to the largest freshwater source in the region, the Fuerte River. In Strength from the Waters James V. Mestaz demonstrates how the Mayo people used newly available opportunities such as irrigation laws, land reform, and cooperatives to maintain their connection to their river sy

stem and protect their Indigenous identity. By using irrigation technologies to increase crop production and protect lands from outsiders trying to claim it as fallow, the Mayo of northern Sinaloa simultaneously preserved their identity by continuing to conduct traditional religious rituals that pai

d homage to the Fuerte River. This shift in approach to both new technologies and natural resources promoted their physical and cultural survival and ensured a reciprocal connection to the Fuerte River, which bound them together as Mayo. Mestaz examines this changing link between hydraulic technolo

gy and Mayo tradition to reconsider the importance of water in relation to the state’s control of the river and the ways the natural landscape transformed relations between individuals and the state, altering the social, political, ecological, and ethnic dynamics within several Indigenous villages.

Strength from the Waters significantly contributes to contemporary Mexicanist scholarship by using an environmental and ethnohistorical approach to water access, Indigenous identity, and natural resource management to interrogate Mexican modernity in the twentieth century.

Hydraulic system進入發燒排行的影片

自動化倉儲撒水特性分析

為了解決Hydraulic system的問題，作者陳躍仁 這樣論述：

台灣網路購物興盛，為能有效率配置大量商品，物流業使用自動倉儲來進行貨品存放，發生火災時，其延燒速度均十分迅速。在自動倉儲中，自動撒水設備可在火災時第一時間有效滅火並侷限火勢，在無人化的工作環境中是消防單位與保險公司認為較可靠的滅火設備。國內的自動撒水設備主要參考日本法規之規範，為了方便官方審核，法規規範僅限以手算方式設計撒水系統，法規規範過於簡略，對於倉儲內貨架型式、貨架排數及貨品分類等均無較細緻之規定，難以對應實務面之需求。現今中美各國已結合設計理念及法規開發出電腦模擬軟體進行水力計算，而國內則仍僅限手算，與各國已有明顯差異。本研究比較國內、中國GB及美國NFPA法規分析國內自動倉儲案例，

以最低撒水密度值來看，國內規範明顯較其他2國低估，建議國內法規應增加適合國內實務現況倉儲內貨架型式、貨架排數、貨品分類及儲貨高度等分類，再依照分類繪製防護空間撒水密度及撒水頭間距等對照圖表，以期待設計之自動撒水系統符合儲物空間之滅火需求；並以水力計算軟體KYPIPE評估國內自動倉儲之自動撒水設備幫浦出水量以130L/min（K值＝114）之合理性，發現20個撒水頭系統尚能符合需求，24及30個系統均有不足之情形；以樹狀、環狀及網狀等3種配管模式模擬24個撒水頭放水，以網狀配管模式具有最高之滅火效能，搭配既設合法幫浦規格可以達到法定撒水密度，在不更改既設幫浦及水源情況下，對於既設倉儲提升撒水密度

提供了一個方法。

Automotive Power Systems

為了解決Hydraulic system的問題，作者Neacșu, Dorin O. 這樣論述：

Vehicles are intrinsically linked to our lives. This book covers all technical details of the vehicle electrification process, with focus on power electronics. The main challenge in vehicle electrification consists of replacing the engine-based mechanical, pneumatic, or hydraulic ancillary energy

sources with electrical energy processed through an electromagnetic device. The book illustrates this evolutionary process with numerous series-production examples for either of body or chassis systems, from old milestones to futuristic luxury vehicles. Electrification of ancillaries and electric p

ropulsion eventually meet into an all-electric vehicle and both processes rely heavily on power electronics. Power electronics deals with electronic processing of electrical energy. This makes it a support technology for the automotive industry. All the automotive visions for the next decade (2020-2

030) are built on top of power electronics and the automotive power electronics industry is expected at 15% compound annual growth rate, the highest among all automotive technologies. Hence, automotive power electronics industry is very appealing for recent and future graduates. The book structure f

ollows the architecture of the electrical power system for a conventional engine-based vehicle, with a last chapter dedicated to an introduction onto electric propulsion. The first part of the book describes automotive technologies for generation and distribution of electrical power, as well as its

usage within body systems, chassis systems, or lighting. The second part explores deeper into the specifics of each component of the vehicle electric power system. Since cars have been on the streets for over 100 years, each chapter starts with a list of historical achievements. Recognizing the engi

neering effort span over more than a century ennobles the R&D efforts of the new millennium. Focus on history of electricity in vehicle applications is another attractive treat of the book.The book fills a gap between books targeting practical education and works sharing advanced academic vision

, offering students and academics a quick tour of the basic tools and long-standing infrastructure, and offering practicing engineers an introduction on newly introduced power electronics-based technologies. It is therefore recommended as a must-have book for students and early graduates in automoti

ve power electronics activities.

超疏水性在結露狀況下對氣冷式熱交換器性能的影響

為了解決Hydraulic system的問題，作者莫尼實 這樣論述：

濕空氣冷凝是熱管理系統中常見的過程，在冷凍空調循環中尤為重要，冷凝現象發生於當熱交換器，特別是蒸發器，在低於空氣露點的溫度下操作時。此現象將會導致鰭片側的冷凝液滴(膜)滯留(retention)與橋接(bridging),進而造成風機壓降與能耗的增加。本研究旨在開發一種超疏水熱交換器，通過其疏水特性，最大限度地減少冷凝水的滯留和橋接。本研究提出一種新型的超疏水性鰭片換熱器設計構想，採用傾斜鰭片排列以達到最小壓降和最大節能效果。本研究從熱傳與壓降性能的觀點切入，將新型超疏水性傾斜鰭片換熱器與其他換熱器作比較分析，分別為：超疏水水平鰭片換熱器、親水性傾斜鰭片換熱器、與親水性水平鰭片換熱器。此外，

本研究藉由改變不同的操作條件，如：進氣溫度、相對濕度和鰭片間距，對這四種換熱器進行性能測試。親水和超疏水換熱器中分別以膜狀冷凝和滴狀冷凝模式為主。由於其表面的高潤濕性，親水換熱器會有較大的液滴脫落直徑。相比之下，超疏水換熱器中發生的 Cassie-Baxter 液滴模式，促使了較小的液滴脫落直徑。本研究建立了一個力平衡模型來分析液滴脫落直徑，模型參數包括了表面張力、慣性力與重力對液滴的影響。本研究基於韋伯數(We)與邦德數(Bo)與液滴脫落直徑，引入了一個新的無因次參數( )，該無因次參數 可預測表面的凝結水脫落能力，在給定的鰭片間距下， 越小代表凝結水脫落能力越好。研究結果表明，滴狀冷凝的

超疏水換熱器在濕空氣下的冷凝熱傳性能相較膜狀冷凝的親水性換熱器並未有顯著的提升，此結果可歸因於非凝結性氣體效應。然而，在壓降方面，超疏水性換熱器與親水性換熱器相比，可帶來高達70%的壓降降低，大幅提升節能效果。壓降的降低歸因於聚結誘發的液滴跳躍現象，使得冷凝水連續脫落。