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摘要:努力保護(hù)水源,尤其是在鄉(xiāng)鎮(zhèn)地區(qū)的飲用水源,是中國(guó)污水處理當(dāng)前面臨的主要問題。氮元素在水體富營(yíng)養(yǎng)化和對(duì)水生物的潛在毒害方面的重要作用,目前廢水脫氮已成為首要關(guān)注的焦點(diǎn)。人工濕地作為一種小型的,處理費(fèi)用較低的方法被用于處理鄉(xiāng)鎮(zhèn)生活污水。比起活性炭在脫氮方面顯示出的廣闊前景,人工濕地系統(tǒng)由于溶解..
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Abstract-For small and middle manufacture enterprises (SMME), the problem of workers' wages in multi-variety and batch production system are studied in this paper. Based on analyzing the operation characters of the enterprises, the piece rate and its shortages in the enterprise have been studied ..
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摘要:本文通過對(duì)兩個(gè)案例的學(xué)習(xí),分析在新西蘭奧特來羅瓦法律的實(shí)踐和這個(gè)殖民大陸上“非法”、“不文明”以及“混亂”的關(guān)系。由于在奧特來羅瓦,法律和殖民利益的直接掛鉤,我認(rèn)為,無論在哈克黨案還是邁爾五世萬佳市議會(huì)案,關(guān)于辯護(hù)的法令都著重于法律的權(quán)威性和對(duì)差異性的排擠之間的關(guān)系。據(jù)兩案的法官說,毛利法..
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Abstract: This paper presents a new method for designing a dual-frequency patch antenna with circular and linear polarizations. Dual-frequency operations are behaved by etching two narrow slots close to the radiating edges of a rectangular patch. The circular polarization at the lower resonant fr..
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先進(jìn)制造技術(shù)的新發(fā)展摘要: 本文介紹了當(dāng)今制造技術(shù)面臨的問題,論述了先進(jìn)制造的前沿科學(xué),并展望了先進(jìn)制造技術(shù)的發(fā)展前景。關(guān)鍵詞:?jiǎn)栴}; 先進(jìn)制造技術(shù); 前沿科學(xué); 應(yīng)用前景制造業(yè)是現(xiàn)代國(guó)民經(jīng)濟(jì)和綜合國(guó)力的重要支柱,其生產(chǎn)總值一般占一個(gè)國(guó)家國(guó)內(nèi)生產(chǎn)總值的20%~55%。在一個(gè)國(guó)家的企業(yè)生產(chǎn)力構(gòu)成中,制造技術(shù)的..
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Ⅰ、新奧法的設(shè)計(jì)原理一、隧道設(shè)計(jì)施工的兩大理論及其發(fā)展過程二十世紀(jì)以來,人類對(duì)地下空間的需求越來越多,因而對(duì)地下工程的研究有了一個(gè)突飛猛進(jìn)的發(fā)展。在大量的地下工程實(shí)踐中,人們普遍認(rèn)識(shí)到,隧道及地下洞室工程,其核心問題,都?xì)w結(jié)在開挖和支護(hù)兩個(gè)關(guān)鍵工序上。即如何開挖,才能更有利于洞室的穩(wěn)定和便于支護(hù)..
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摘要 :了新的術(shù)語,明確了對(duì)稱與諧波成分的關(guān)系。三相對(duì)稱集和不對(duì)稱集集合的分類。子介紹,名稱分別為對(duì)稱平衡臺(tái),套對(duì)稱不平衡,不對(duì)稱平衡集和不平衡不對(duì)稱套表明,三相集可以解決的任何一個(gè),兩個(gè)或三個(gè)對(duì)稱組件集。從四個(gè)案例研究的結(jié)果表明,這些子類和他們的解釋的對(duì)稱分量有助于理解有諧波分析的系統(tǒng)平衡和不平..
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Service reliability and quality of power have become growing concerns for many facility managers, especially with the increasing sensitivity of electronic equipment and automated controls. There are several types of voltage fluctuations that can cause problems, including surges and spikes, sags, ..
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外文翻譯------數(shù)控技術(shù)