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The Internet also known as the Net is the world's largest computer network . “ And what is a network”? You may ask. A computer network is basically a bunch of computers booked together somehow. In concept, it's sort of like a radio or TV network that connect a bunch of radio or TV stations. ..
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摘要 在數(shù)控機床中刀具探測器是非常重要的。在現(xiàn)代工業(yè)中探測器的應用及缺 點。按照起初的想法,在切削刃的四個方向: + X,-X, + Z和-Z定向刀具磨損的直接測量中全部使用應變橋。關鍵詞:探針,應變式傳感器,刀具磨損的測量,直接測量刀具磨損。1引言 各領域制造技術的快速發(fā)展,以降低成本,提高精度和縮短生產(chǎn)..
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Abstract - The test of low-voltage switchgear (contactor,relay, breaker etc.) includes electric longevity and electriccharacters of turn on-off. The fast calculation and analysis methods for electric parameters were investigated. Muchattention has been paid to the effect of performance in lowvolt..
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關于資本成本、資本預算和資本結(jié)構問題,我們調(diào)查了392位首席財務官。大的公司主要依靠現(xiàn)值技術和資本資產(chǎn)定價模型,而小公司相對地比較喜歡使用回收期標準。當發(fā)行債務時,公司比較注重維護財務彈性和比較好的信用等級;當發(fā)行股票時,比較注重每股收益稀釋和近期股票價格升值情況。我們發(fā)現(xiàn)了對于支持優(yōu)序融資假說和交..
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適當有效的建筑材料是限制富有經(jīng)驗的結(jié)構工程師成就的主要原因之一。早期的建筑者幾乎都只使用木材,石頭,磚塊和混凝土。 盡管鑄鐵在修建埃及的金字塔中已被人們使用, 但是把它作為建筑材料卻由于大量熔煉它比較困難而被限制。 藉由產(chǎn)業(yè)革命,然而,受到把鑄鐵作為建筑材料和在大量融煉它的能力的兩者對其雙重需要的影..
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ABSTRACT: the limit-equilibrium method is commonly, used for slope stability analysis. However, it is well known that the solution obtained from the limit-equilibrium method is not rigorous, because neither static nor kinematic admissibility conditions are satisfied. Limit analysis takes advant..
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自由曲面光學元件具有許多優(yōu)異的光學性能,越來越多地應用到現(xiàn)代光學系統(tǒng)設計中。而自由曲面光學元件制造的復雜性和不確定性是制約其應用的瓶頸之一。慢刀伺服單點金剛石車削是一種可以加工很高精度自由曲面光學表面或非回轉(zhuǎn)對稱光學曲面的新技術。機床伺服執(zhí)行能力是自由曲面能否加工的基本條件。金剛石刀具幾何參數(shù)的..
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Computer Program, set of instructions that directs a computer to perform some processing function or combination of functions. For the instructions to be carried out, a computer must execute a program, that is, the computer reads the program, and then follow the steps encoded in the program in a ..
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Abstract :The basis of the design of earth and rockfill dams is focused on ensuring the stability of the structure under a set of conditions expected to occur during its life. Combined mechanical and hydraulic conditions must be considered since pore pressures develop during construction, after..