Base on certain main magnets of nmr this thesis designs the most excellent structure of the pole shape and obtains a relatively uniform magnetic field in a large imaging volume. the calculating model of pole shape made of pure iron can be simplified with the infinite permeability and calculated with the scalar potential. the rule between pole shape and the homogeneity or the size of uniform region of magnetic field is discovered and factors of influencing the homogeneity of the magnetic field are held so that the main magnet with the optimized size of pole shape can produce a relatively uniform magnetic field in a large imaging volume
本文針對一類典
型結構的主磁體,通過磁場分析與大量的計算,找到了極
靴形狀的改變影響樣品區磁場均勻度以及均勻區域范圍的規律,掌握了極
靴形狀的變化趨勢及其形狀影響樣品區磁場均勻度的各種因素,進行了極
靴的形狀優化設計並編制了相應的計算機軟體,給出了極
靴形狀的具體尺寸,使得主磁體能在更大空間內產生相對均勻的磁場。
He could not help noticing a georgian or armenian family, consisting of a very old man, of a handsome oriental cast of face, dressed in a new cloth - faced sheepskin and new boots ; an old woman of a similar type ; and a young woman
他無意地注意到了一個喬治亞人或阿爾明尼亞人的家庭,這個家庭是由一個年高的長者漂亮的東方臉
型,穿一件新皮襖和一雙新
靴子一個同樣臉
型的老太太和一個年輕女郎所組成的。
Drechsler joseph gmbh offer to you safety boots and products of leather in addition also info on rubber goods
Drechsler joseph gmbh是一家高效的工業
型企業,企業生產橡膠製品,皮革產品,絕緣
靴范圍內高水平的產品。
Boot vamp moulding machine
靴面定
型機
A new recipe has been added for rocket boots xtreme lite, a cloth version of the rocket boots xtreme. this pattern drops from mechano - lord capacitus
一個新的圖樣:超級輕
型火箭
靴(布衣版的超級火箭
靴) .由機械領主卡帕西圖斯掉落
These tests were not uniformly successful against all anti - personnel landmine types tested, but they did show that our boots can provide substantial protection against high velocity fragments, debris and hot gas streams created during blasts from particular common types of anti - personnel landmines at certain explosive charges
雖然並沒有對測試的所有類
型的步兵雷取得成功,但測試結果表明,對于某些具有一定爆炸威力的常見類
型步兵雷,我們的
靴子確實能有效防護其爆炸產生的高速碎片殘片和灼熱氣浪。
In addition, a kind of sliding shoes structure named step - shallow cavity type is presented and compared with the common one, which give more satisfactory results
另外,本文提出了一種階梯淺腔
型式的滑
靴結構,將其特點和性能與普通
型式的滑
靴進行比較,得到更加滿意的結果。
In this thesis, pressure distribution model of water film in sliding shoes supporting clearance with considering inertia is deduced and according curve is drawn to vividly illustrate the effect of inertia on water film
本文推導出了考慮慣性時滑
靴支承間隙中水膜的壓力分佈模
型,並作出曲線加以形象的說明。
By application of the simulink toolbox of matlab, the simulation models were obtained. in addition, the relation between various parameters of the slipper pair and ball friction coupling based on hydrostatic support and dynamic characteristic of the oil film was analyzed. 5
建立了靜壓支承球鉸副和滑
靴副油膜動態特性的數學模
型,並運用matlab中的simulink工具箱對油膜的動態特性進行模擬; 5
The concept and the producing mechanism of cavitation are introduced and the cavitation analyzing model is deduced, which makes it easy to explain the approximate region and. the extent of cavitation occurrence in theory. and the wider and deeper research combining with experimental analysis can present a further perfect and feasible reference for sliding shoes design
本文介紹了氣蝕的概念和形成機理,並推導出氣蝕分析模
型,從而有利於從理論上指明氣蝕發生的大致區域和程度,並結合實驗分析促使研究的全面化和深入化,為滑
靴設計提供更加完善和合理的參考。
This paper summarizes the results of researches on track vibration damping and noise reduction for tianjin metro line 1, such as the new - type high - elastic vibration damping fastening and block sleepers with rubber - plastic boots
摘要在天津地鐵1號線軌道系統中,採用新
型高彈性減振扣件、新
型橡塑套
靴彈性短軌枕等減振降噪的創新技術。
Footwear, leather and imitation leather goods manufacturing machines - modular shoe repair equipment - safety requirements
鞋
靴皮革和人造革商品生產機械.按標準
型式設計的鞋修理設備.安全要求
Footwear, leather and imitation leather goods manufacturing machines - modular shoe repair equipment - safety requirements ; german version en 12387 : 2005
鞋靴皮革和人造革商品生產機械.按標準型式設計的鞋