選擇裂化 的英文怎麼說

中文拼音 [xuǎnzháilièhuà]
選擇裂化 英文
selective cracking process
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 擇 : 擇動詞（挑選） select; pick; choose
  • 裂 : 裂動詞[方言] （東西的兩部分向兩旁分開） open
  • 選擇 : select; choose; opt; election; choice; culling; alternative
  1. The quality of furan sand castings is usually better than clay sand castings, however, some defects are also very easy take place with furan sand castings such as blow hole, metal penetration, veining, cracking, slag inclusion, hardness too low, surface recarburation, surface sulphuration, nodularity degeneration etc, which were usually caused by improper raw materials selection, improper method design, incorrect moulding or / and core - making

    摘要呋喃樹脂砂鑄件質量一般比黏土砂鑄件好，但如果原材料選擇、工藝設計、造型和制芯操作不當，也會產生氣孔、粘砂、脈紋、裂紋，夾渣、硬度不足、滲碳、滲硫和球化不良等鑄造缺陷。
  2. Adopt advanced technic of f4 whole cold - press to moulding and heat melt to process to make, let the lining no slot to link withal cheek by jowl connect with exterior metalpipes wall, in the state of allowwing to work keep to distort in - phase, thereby to enhance using - life of lining in the working status of opposite high temperature high vacuum, stop the ecumenic pad fluorin pipes using in condition of cold and heat alternate and minus tension to come into being the matter of padding fluorin floor shrivel to jam the flowway and plastic rip, its perfect choice use to transport medium of strong corrosive strong oxidation by modern chemical - industry corporation

    採用氟塑料f4整體冷壓成型及熱熔加工等先進技術製造，使內襯層無縫搭接且與外層金屬管壁緊密粘接，在允許工作狀態下能夠保持同步變形，從而提高了襯里層在相對高溫高真空度的工況下的使用壽命，杜絕了一般襯氟管在冷熱交替，及負壓的條件下使用易產生襯塑層鼓癟阻塞流道及塑料拉裂的問題，是現代化工企業在輸送強腐蝕強氧化介質理想的選擇。
  3. According to the demand of the concept design of china spallation neutron source ( csns ), the target station, i. e. the target, the reflector and the moderator have been simulated and optimized using monte carlo simulation software, nmtc / jam and mcnp4a, firstly. the neutron flux escaping from the target and the moderator and the heat deposition in the target, the reflector and the moderator are calculated. these results provided essential data as a basis of the spallation neutron source design

    本論文結合當前中國散裂中子源（ chinaspallationneutronsource ， csns ）工程概念設計的迫切需要，選擇國際上廣泛使用的基於蒙特?卡羅方法，用於模擬粒子輸運過程的程序mcnp4a和nmtc jam作為研究工具，首次對csns靶站進行了全面的模擬與優化，內容包括靶、反射體與慢化器系統的中子通量分佈以及熱量沉積，同時計算了靶的溫度場與應力場分佈。
  4. This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development. its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror, analyze glass cutting principle, design specisl - use grinding wheel structure, select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid, look for the technological parameters such as the optimal acid concentration and etching time etc. ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and

    本論文的研究主要是瞄準國家高技術對大口徑輕型鏡的戰略需求而開展的。主要研究內容是：根據光學玻璃的物理與化學性能，選擇輕型鏡坯材料；用有限元法對鏡子的變形進行分析、計算，找出變形規律，優化設計400mm輕型平面鏡、 450mm輕型球面鏡鏡體結構；分析玻璃切削原理，設計專用磨輪結構，選擇合理工藝技術參數，完成400mm平面鏡輕量化減重孔的加工；分析氫氟酸腐蝕光學玻璃機理，尋找最佳酸濃度、腐蝕作用時間等工藝參數，實現400mm平面鏡減重孔應力與微裂紋的消除；討論分離器加工原理和工藝技術特點，完成400mm平面輕型鏡面形加工。
  5. The first part comprises industrial pta oxidation process modeling, residual fluid catalytic cracking process modeling, complex distillation modeling and analysis, the application of pta oxidation process soft - sensor technology. in the second one, the infeasibility degree based genetic algorithm is proposed to handle constrained optimization problem in engineering cases and the neighborhood and archive based genetic algorithm and its variant are proposed to treat the multi - objective optimization problem. with that, the pta oxidation process is regarded as a benchmark for the application of the proposed multi - objective optimization genetic algorithm

    論文內容分為兩部分，第一部分對包括三個典型的工業過程， pta氧化反應器、渣油催化裂化反應系統和復合式精餾塔進行分析、建模以及pta氧化過程的軟測量工程實施；第二部分分別提出了基於進化演算法解決工業過程中普遍存在的約束優化問題和多目標優化問題的過程優化演算法? ?基於不可行度選擇遺傳演算法和基於鄰域和存檔操作遺傳演算法，並利用該演算法對工業pta氧化過程操作進行多目標優化研究。
  6. The choice of the process flow for the hydro cracking unit feed filtration

    加氫裂化裝置原料過濾方案的選擇
  7. The yinachang fe - cu - ree deposit is one of typical deposits and mainly occurs in yinmin formation of kunyang group of middle proterozoic epoch. this paper mainly reports the results of investigation on the ree geochemistry of various rocks and minerals, the sources of ore - forming materials and the age of mineralization. the preliminary mechanism of sudden ree enrichment and mineralization in middle proterozoic has been interpreted

    本論文選擇迤納廠礦床為主要研究對象，系統研究礦床不同類型巖（礦）石和礦物的稀土元素地球化學特徵，探討富稀土的成礦流體、成礦物質來源和稀土元素成礦時代，揭示昆陽裂谷初期因民組稀土元素富集的地球化學機制。
  8. Its main steps are as follows : ( 1 ) to determine the tensor of hydraulic conductivity of the rock mass near the ground ; ( 2 ) to back - analyzing of stress field ; ( 3 ) to predict the fissure aperture at different levels ; ( 4 ) to suppose the structure of fissure network not to vary with depth and to calculate the tensor of hydraulic conductivity of the wall rock

    其主要思想是，首先確定近地表巖體的滲透張量；根據地應力實測資料進行地應力場的量級反演；選擇適當的裂隙開度-應力模型，預測不同深度的裂隙開度；在裂隙網路結構不隨深度變化這一假定的基礎上，計算隧道標高的圍巖滲透性。
  9. A pair of primers were designed and synthesized based on the published ge gene sequence of prv - rice strain for amplifying ge gene of prv min - a, yielding a 1. 7kb band. the segment was linked to puc19 plasma dna by means of t4 dna ligase, transformed into e. coli jm109 permissive cells, and incubated on lb fray containg amp, x - gal and iptg. small amount of plasma was extracted by base cleavaging for enzyme digest analysis and pcr, resulting in recombinant plasma puge dna containing prv ge

    用t _ 4dna連接酶使ge基因與經bamhi 、 kpni同樣雙酶切的puc19質粒dna連接；用連接產物轉化大腸桿菌jml09感受態細胞，置含amp 、 x - gal和iptg的lb平板上培養12 20小時；挑取白色菌落於選擇性培養基擴大培養，堿裂解法小量提取質粒dna ，並進行酶切分析鑒定，結果獲得整合有prvge基因的重組質粒pugedna ，並與其它prv分離株進行ge基因序列同源性分析。
  10. With compared to other species of schizothoracinae fishes, the diploid chromosome number of qinghai - lake nakked carp was equal to schizothorax waltoni, s. o ' connori, oxygymnocypris stewarti, schizoygopsis pylzovi and chuanchia labioza. this showed that these schizothoracinae fishes which diploid chromosome number were 92 were likely to have experienced similar ecological environment as they involved into special qinghai - tibten plateau - adaptive species gradually

    由此反映出具有92條染色體的裂腹魚在逐漸演化成適應于高原生態環境的特殊類群時，可能經受過相同或相近的生態處境；與大多數裂腹魚一樣，青海湖裸鯉也可能是二倍化了的多倍體；青海湖裸鯉可能是某些原始的?類通過演化和自然選擇，逐漸演化成適應于高原生態環境的特殊類群。
  11. Based on the engineering practice of the side slope excavation of dayanchi section within the road for the construction traffic of guandi hydropower station, the problems such as the selection of blasthole distance for presplit blasting, and the rock ridge, the levelness of the presplit face, lower hole - making rate of the auxiliary blastholes after the presplit blasting, the blasting network for prespliting and blasting zone and the angle change of the presplit hole etc. are analyzed ; for which the specific solutions are put forward herein as well

    摘要通過官地水電站對外交通公路大鹽池合同段邊坡開挖中預裂爆破的工程實踐，對預裂爆破的孔距選擇及下部嚴重出現巖坎、預裂面平整度、預裂爆破后輔助孔成孔率低、預裂與爆破區爆破網路以及預裂孔角度變化等問題進行分析，提出了具體的解決方法。
  12. Certainly, china money circulation speed does not fluctuate widely because china chooses a kind of " progressive " reforming model. the author points out that the recent gr adual slow - down of money currency speed is due to the breaking down of the cycling chain of capital and the deposit ca n ' t turn into investment and form output effectively at the same time

    當然，中國貨幣流通速度未出現大幅波動只是中國選擇了一種「漸進式」改革模式，同時筆者指出近期廣義貨幣流通速度下降是因為資金循環鏈條的斷裂，儲蓄不能有效轉化為投資形成產出所致。
  13. The paper has made a comprehensive study to marine carbonate oolitic reservoir in triassic of feixianguan group of intra - platform taphrogenic trough basin in north - east past of sichuan basin. according to the principle of high resolution stratigraphic sequence, combined with original results gained form the area, the author have built up the base level cycles and fades model of different stages based on the surface identification mark of base level cycle using the information of geology, seismic, logging, core and outcrops

    1 、依據層序地層學高解析度基準面旋迴原理與識別技術，建立了裂陷槽向上變淺直至露出水面過程中形成的基準面旋迴變化的7種特徵性識別標志，包括泥巖表面乾裂、淡水選擇性溶蝕、白雲化現象、白雲巖、石膏、伽瑪曲線高值、向上變厚、變粗序列、向上變細、變泥、變紅序列、向上值變低序列等。
  14. Through the choice of pile - cap concrete ' s raw material and the mix optimization design, it is concluded that the mix design of mass concrete not only satisfy all the design requirements, but also attain the anti - crack concrete

    實例證實：通過對大體積混凝土的原材料選擇和配合比的優化設計，不僅能保證大體積混凝土的設計要求，也實現了大體積混凝土防裂的目標。
  15. Abstract : in this article, the optimization of surface crack detection of speed reducer gear was made using fuzzy set theory, the result show that the rotation magnetic field is the best way of surface crack detection and lots of extending surface fatigue cracks were found in practice

    文摘:採用模糊集的貼近度計算對齒輪表面探傷方法進行了優化選擇，表明旋轉磁場探傷是齒輪表面探傷的最佳方法，在實用中檢測出大量的正在延伸擴展的表面疲勞裂紋。
  16. Rubber vulcanized of thermoplastic. resistance to ozone cracking. reference and alternative methods for determining ozone concentration in laboratory test chambers

    熱塑性硫化橡膠.抗臭氧開裂.試驗室試驗間中臭氧濃度測定用基準法和選擇法
  17. This paper analyses the problem of concrete cracking and leakage, and set up the model of the middle or low - strength steel slag anti - cracking and impermeable concrete ( acic ) on the base of the analysis. the four principles of water permeable resistance character, volume stability character, toughness and anti - chemical corroded character have been put forward for raw materials selection and durability design of acic, acic is designed by the theory of composite material and the theory of fiber - reinforced, and two series of acic, such as fly ash series and steel slag series, have been manufactured by means of mineral admixture, hybrid fiber and chemical admixture. hydrating heat, macro - mechanics quality, durability and microstructure of the acic have been researched

    本文對中低標號大體積混凝土滲透開裂問題進行了研究，從混凝土自身結構形成與經濟角度指出大摻量粉煤灰與膨脹劑復合配製大體積混凝土的問題所在，提出採用鋼渣微細礦粉配製中低標號防滲抗裂混凝土的思路，運用復合材料理論設計中低標號防滲抗裂混凝土，提出了低水化熱、抗滲性能、體積穩定性、韌性和抗沖磨性能是中低標號防滲抗裂混凝土材料選擇和耐久性設計的主要原則，採用鋼渣微細粉復合混雜纖維、化學外加劑的技術路線，配製了適合於深水等特殊環境中的大體積中低標號鋼渣系列防滲抗裂混凝土，對其進行水化特性、宏觀物理力學性能、耐久性和微觀結構研究。
  18. As an important branch of rapid prototyping ( rp ), selective laser sintering ( sls ) is attractive to many researchers in manufacturing for its wide use of metal, polymer, ceramic and other powder in the sintering

    但是，直接用金屬粉末激光燒結金屬零件還存在一定的不足之處，其中燒結件「球化」 、翹曲和開裂現象是制約金屬粉末選擇性激光燒結應用的主要障礙。
  19. The components of the decomposition products and the choice of catalysts are the main focus of this study

    裂解產品組分的構成及催化劑的選擇是本研究的主要內容。
  20. Having served as the director of the institute of chemistry, academia sinica for nine years 1987 - 1996 and the president of the chemical society in taipei for two years 1993 - 1994, dr. chou put in great efforts to promote the international activities of the chemistry community in taiwan

    年起探討超音波震碎鉀對?類化合物中碳-硫鍵斷裂反應研究，發現了極有趣的化學選擇性，方位選擇性及立體選擇性，亦對超音波震碎鋰在有機膦化學上的用途有些研究報告。曾於
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