有損反轉 的英文怎麼說
中文拼音 [yǒusǔnfǎnzhuǎn]
有損反轉
英文
poison reverse-
To improve the capability of the bearing - less slice permanent motor, to reduce the ullage of the motor and the badly additive torque, i design optimization the structure of the rotor pm, and two projects are proposed. one is four pieces rotor pm which is the same magnetized and the other is eight pieces rotor pm which is different magnetized direction
為了進一步改善片狀無軸承永磁電機的動態性能，減小電機的損耗及有害的附加轉矩，優化設計了轉子永磁貼片的結構，提出了四片同向充磁和八片正反向充磁兩種方案。Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles
對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較，模擬研究和實驗結果表明，當反電動勢的平頂寬度小於107電角時，採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上，更有效地抑制電磁轉矩脈動。The results indicated that the dimension, shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c, but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased, melting temperature and decomposition temperature decreased, in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o, c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests. the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big. this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60, 30 : 30 - 40 and 60 : 15 - 30 respectively, the friction coefficient was relatively small. the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time, the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle, lubricant transfer film could be formed on metal surface, thus direct contact between the surface of metal friction pair rings was reduced. their working life was elongated extremely ; there was mainly much graphite, a little ptff, moo3, feso4, cus and so on in lubricant transfer film
試驗結果表明：所選原料的尺寸、形狀及純度可滿足固體潤滑劑的性能要求；聚四氟乙烯樹脂熱分解溫度超過400 ，但在ptfe中加入無機填料會使復合材料吸水率提高，熔融溫度及分解溫度降低，且伴有氧化分解反應；碳纖維表面含有c = o及c - o - c等極性基團，有利於提高其與其它組分的相容性，提高層間剪切強度；均勻設計試驗方法能夠用較少的試驗次數找出配方與摩擦性能間的關系，擬合曲線基本能表示各配方的摩擦系數發展趨勢；配方中不加銅粉或不加石墨，其摩擦系數均較高，說明銅粉和石墨應該配合使用；當銅粉15份、石墨60份時，銅粉30份、石墨30 - 40份時，銅粉60 、石墨15 - 30份時，摩擦系數均具有較低值；純聚四氟乙烯樹脂在空氣冷卻時結晶度最大，磨損量也是三者中最大的；同時，固體潤滑劑試樣在空氣冷卻時的磨損量也是三者中最大的：不論是固體潤滑劑與45 #鋼軸配副或是固體潤滑劑鑲嵌入銅套后與gcr15鋼軸配副，在金屬表面均可形成潤滑轉移膜，從而減少金屬摩擦副表面間的直接接觸，大大延長其使用壽命;轉移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。In the process of building and using the mass concrete structures, because of the effect of out - side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance using nondestructive testing method to test the concrete ' s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseases this dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic fem to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, researched the principles of the first - arriving waves " phase when the cracks " depths are not same, obtained the relation between the inversion point and the cracks " depth, which has the direction sense in the application of projects, the second part of this dissertation is ct, which used the ultrasonic wave running through the tested - substance to get arriving - time of the ultrasonic wave, then inverse the image this dissertation drawed one ct program which can well present the different little cells " ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested - substance, ct has the better using foreground.
在混凝土結構的施工及使用過程中，由於受其自身及外界各種因素的影響，常常會產生一些缺陷，對結構物的承載能力和耐久性造成嚴重影響，採用無損檢測技術進行質量檢測和健康診斷，這對混凝土結構開展安全、穩定性評估以及病害隱患治理研究具有重要意義。本論文主要針對大體積混凝土結構缺陷的檢測方法展開研究工作，重點討論了超聲波法檢測混凝土結構裂縫的基本原理和方法及其特點、適用范圍，運用動力有限元數值模擬其檢測過程，探討了有裂縫缺陷的混凝土結構在脈沖荷載作用下彈性波的傳播及其變化特徵，研究了不同裂縫深度下首波相位變化規律，得出了反轉臨界點與裂縫深度之間的關系，這對實際工程應用具有指導意義。聲波ct是一種新的無損檢測技術，它是利用聲波穿透被檢測體獲取聲波接收時間，來進行計算機反演成像的技術。Ups will not transport any goods that are prohibited by law or regulation of any federal, state or local government in the origin or destination countries, or that may breach any applicable export, import or other laws or endanger the safety of our employees, agents and subcontractors or the means of transportation or, that in our opinion, soil, taint or otherwise damage other goods or equipment or that are economically or operationally impractical to transport
Ups拒絕運輸所有來源地或目的地國家的任何聯邦州政府或當地政府法例禁止的貨件，或違反任何適用的出口進口或其他法例，或危及我們員工代理及轉包商運輸工具的貨件，或對我們來說，會弄臟污染或損壞其他貨件或設備，或實際上無法進行運輸的貨件。Fbg can be immune from light source disturbance and system loss by transforming sensing information into its reflecting wavelength shift, which has the characteristic of wavelength coding
由於它能將被感測信息轉化為其反射波長的偏移，即具有波長編碼的特性，因而不受光源功率波動和系統損耗的影響。In this thesis, a novel structure of silicon - based passive ring waveguide resonation cavity is firstly introduced and designed. the design is combined with the mems technology, which gets rid of the curved waveguides in the previous waveguide ring resonation cavity and facilitates optical integration. the structure has characteristic of " the smaller the resonation cavity, the smaller the loss ", which has a promising future of miniaturization and fits the field of resonation rmog
本文首次提出並設計了一種新結構的硅基無源環形波導式諧振腔，該設計與微機械技術相結合利用集成反射鏡實現光波導直角轉彎，擺脫了以前的波導式環形諧振腔中必需包含的彎曲波導，易於光學集成；同時該結構具有諧振腔越小損耗就越小的特點，有很好的微型化前景，很適合應用於諧振式微光陀螺（ rmog ）領域。Party a will guarantee the lease right of the premises. in case of occurrence of ownership transfer in whole or in part and other accidents affecting the right of lease by party b, . party a shall quarantce that the new owner, and other associated, third parties shall be bound by the terms of this contract. otherwise, party a will be responsible to compensate party b ' s losses
甲方應確保出租的房屋享有出租的權利，如租賃期內該房屋發生所有權全部或部分轉移、設定他項物權或其他影響乙方權益的事件，甲方應保證所有權人、他項權利人或其他影響乙方權益的第三者能繼續遵守本合同所有條款，反之如乙方權益因此遭受損害，甲方應負賠償責任。However, despite the dollar ' s recent weakness, there is little evidence of cross - currency carry trades - perhaps investors learned their lesson from the losses suffered in april, when the dollar rebounded, hitting those who had borrowed the greenback
然而，盡管美元近期走弱，但幾乎沒有交叉貨幣結轉交易的跡象，也許投資人從4月份的損失中嘗到了教訓，當時美元反彈，使那些借入美元的人遭到打擊。Multistage fluidized - bed bioreactor with external circulation has been in use in the production of fuel alcohol by immobilized yeast cells technique. as a new - style reactor. it has the advantage of high conversion, complete reaction and little damage to immobilized yeast cells. flow properties is the foundation of reactor ' s physical transmission process. and it is the key factor of deciding whether the auxiliary material conversion is high or low. at present, the study on flow properties of multistage fluidized - bed bioreactor with external circulation at a pilot scale is rarely reported
多級外循環流化床生物反應器作為一種新型生物反應器，由於具有轉化率高、反應徹底、對顆粒損傷少等優點在固定化細胞制取燃料酒精技術上得到應用。但是，國內關于中試規模多級外循環流化床反應器流動特性的研究還很少，而流動特性是反應器物理傳遞過程的基礎，是研究物料在反應器中轉化率高低的重要因素，因此，弄清楚外循環流化床反應器的流動特性是非常重要的。分享友人