磁強針 的英文怎麼說
中文拼音 [cíqiángzhēn]
磁強針
英文
magnetometer-
The massive magnetic field of a powerful mri machine aligns the nuclei of the atoms in the same direction, much as a magnet pulls a compass needle
一臺效能強大磁振造影儀的強大磁場能使原子核往同一方向排列成行，就好像磁鐵吸引羅盤的指針一樣。The paper lays a strong emphasis on discussing the realization of the autocontrol of raster scanning of the scanner in x - y dimension, the " tapping " of the cantilever of the tappingmode afm by a direct digital synthesizer. then a method of parallel communication between dsp and pc in epp mode is given. finally, the author discussed the digital pid closed loop control of the scanner in z - direction, the automatic approaching of the tip using step - motor, and also some electro - magnetic interferences
論文首先簡單介紹了掃描探針顯微鏡的發展、分類、工作原理及應用；接著對ti公司的tms320vc5402dsp的特點及外圍擴展作了簡單介紹；然後分章節重點講述了利用vc5402dsp實現掃描探針顯微鏡的核心部件? ?壓電陶瓷管的x向和y向的光柵掃描控制；藉助直接數字集成器（ dds ）實現輕敲式原子力顯微鏡的微懸臂的「輕敲」 ； vc5402dsp的主機介面（ hpi ）與pc機在增強并行口（ epp ）模式下的通信；論文最後還介紹了掃描管z向的數字pid閉環控制，步進電機的自動進針，並對實際出現的一些電磁干擾問題作了討論。The role of symmetry analysis in teaching of electromagnetism is clarified systematically, and a logically clear teaching procedure for relevant contents is proposed. the application of mirror symmetry is emphasized
摘要較系統地闡明了對稱性分析在電磁學中的地位，並針對相應的教學內容提出了一種邏輯明晰的教學思路。文中著重強調了鏡象對稱性的應用。The new requirements for applications in material surface engineering urge a new type of hipib apparatus, for instance, the generation of medium - power - density ion beam, high - stability ion beams and long - lifetime ion source etc. therefore, characterization of high power ion diode - magnetically insulated ion diode ( mid ), the key issue for the technique development, is considered in this dissertation. the investigations of hipib generation and its mechanisms have been carried out in a temp - 6 hipib apparatus, in order to optimize the configuration of ion diode and its ion beam parameters for materials surface treatments
針對強流脈沖離子束（ hipib ）技術研發的關鍵環節?高功率離子二極體（磁絕緣離子二極體）的工作特性，在temp - 6型hipib裝置上開展了hipib產生及其形成機理的實驗研究，確定了優化的離子二極體結構和輻照工藝參數；通過hipib輻照金屬材料燒蝕行為的系統研究，揭示了燒蝕表面形貌的形成規律，為徹底弄清hipib與材料相互作用機理提供了實驗依據。Combining the character of heiyingshan ' s lean iron ore and the experiences of hematite dressing home and abroad and locale character that located in the center of gobi desert and lacking electricity and fresh water, we have finished three ways of trial studying which are the magnetic ore dressing, lump dry - magnetic dressing and magnetic - gravity ore dressing
根據黑鷹山礦貧鐵礦石性質和國內外紅鐵礦選礦實踐，結合黑鷹山礦現場地處戈壁沙漠、缺電少水特點，選擇全磁選方案、塊礦干選-磁選方案及磁選-重選方案進行選礦試驗研究，針對選礦試驗情況對中磁?強磁（一粗一精）選礦流程進行了擴大試驗。Aiming at wide variations in loads and moment of inertia, large disturbed moment of a permanent magnet synchronous motor position servo system, and the problem of velocity limit to uniform sliding mode control, a cascaded compound slide mode controller was proposed and designed for permanent magnet synchronous motor position servo system
摘要針對某永磁同步電動機位置伺服系統負載力矩和轉動慣量變化大、干擾力矩強的特點，以及統一滑模變結構控制速度限幅的難題，提出並設計了串級復合滑模變結構拉制器。A new study suggests that dynamic contrast medium ? enhanced magnetic resonance imaging ( dce - mri ) has higher accuracy and can detect papillary carcinoma that is missed by fnab
新的研究表明，有動態對比物作為介質的增強磁共振（ dce - mri ）診斷甲狀腺乳頭狀癌的優于細針穿刺，能發現一些細針穿刺遺漏的病例。Based on both quantitative calculation and theoretical analysis, the magnetically strong and electrically weak connection of power networks and its impacts on the behaviors of zero sequence pilot protection are studied in detail, the reasons and characteristics of the misoperation are summarized, some typical power network topologies that are prone to misoperation are analyzed, and several countermeasures for eliminating the influences of mutual inductance on zero sequence pilot protection are proposed for the sake of the increasingly meshed power networks
從定量計算和理論分析的不同角度，本文深入研究了強磁弱電聯系的網路關系及其對縱聯零序保護動作行為的影響，總結了保護誤動原因和特點，分析了可能發生誤動的典型電網結構形式，並針對當今越來越緊密聯系的電網，提出了幾種解決互感對縱聯零序保護動作行為影響有效的措施。Finally, the authorhas taken into full account the electromagnetic compatiblity. for the strong electro and magnetic interference brought by the sparkle discharge of the ignition system in the gasoline engine, effective anti - interference measures have been taken both in hardware and software so as to assure that the instrument can work normally
最後，充分考慮了電磁兼容性，針對汽油機點火系統火花放電的強電磁干擾，從硬體設計和軟體設計兩個方面採取了有效的抗干擾措施，確保測量儀能夠正常工作。In allusion to the nonlinearity and strong coupling of multiphase pmsm, fuzzy vector control method is brought forward first in the paper. simulation is done on the multiphase system which is built previously. then fuzzy vector control is improved and get better performance
本文針對多相永磁同步電機的非線性、強耦合，首先提出了模糊矢量控制方法，在建立的多相系統上進行了模擬研究，並對一般模糊控制系統做了改進，使得控制的效果更加理想。The composition and structure of the films synthesized by mw - ecrpemsd technology were examined by electron probe, edx, afm, xrd, sem, moreover the corrosion resistance of films were detected by anodic polarization. furthermore, the wear resistance of films was tested by frictional wear. the relationship between properties of films and mw - ecrpemsd technology was summarized
對微波- ecr等離子體增強非平衡磁控濺射沉積工藝制備的薄膜，採用電子探針、 edx 、 aex 、 xrd 、 sem進行成分及微觀結構分析；利用陽極極化測試了薄膜的耐蝕性能；通過摩擦磨損實驗測試了薄膜的耐磨性能；總結了薄膜的特性與制備工藝的關系。The paper is the project named " theory of dynamic precision synchronization traverse and research of realization methods for linear servo dual position loops system ( no - 50075057 ) " as the background, which is supported by national natural science foundation of china drive directly by linear permanent magnet synchronous ac motor, the controlled plant eliminates middle drive parts and avoids the effects of the mechanical transmission chains from rotary motions to linear ones
本文以國家自然科學基金資助項目《直線伺服雙位置環動態精密同步進給理論和實現方法研究（ no 50075057 ） 》為背景，針對直線同步進給提出了一種新的控制方案：模型參考自適應控制。機床採用永磁直線同步電動機直接驅動，省掉了中間的傳動環節，消除了機械傳動鏈的影響；又因永磁直線同步電動機採用高能永磁體，具有電磁推力強度高、損耗低、電氣時間常數小、響應快等特點。分享友人