【正文】 tence of SWNT can enhance the oxidation of same oxidation condition, more SiOx can be produced with the presence of SWNT than the case where there is no is helpful for the intensity of the welding can be modulated by changing the oxidation voltage and the tip moving higher voltage and slower tip moving, stronger welding can be the thermal oxidation of SWNTs in air and the Raman characterization, it was found that this nanowelding has no obvious influence on the chemical structure of with this nanowelding, the magnitude and distribution of strain induced into SWNT by AFM manipulation can be well SWNT and Si can be oxidized when using stronger oxidation condition(much higher voltage and lower tip moving speed), thus the SWNT can be cut at well defined this AFM cutting, nanowelding and manipulation, plex SWNTbased structures can be constructed, proved the function of AFM as a buckling behavior of CNTs under bending has been studiedBy choosing proper manipulation site on SWNT, the length of the fragment which is being manipulated, manipulation path, and optimal tip pressing distance, the angle can be well controlled when SWNT is bent by AFM on this controlled bent of CNT by AFM manipulation, A CNT with a series of different bending angles has been interaction between manipulated SWNT fragment and substrate is largely decreased after the the effective bending region is located at the fragment where Only vdW interaction exists between it and the appears as the cross point between the fixed SWNT part andmanipulated SWNT part in the AFM vdW force exists between the effective bending region and substrate, and its length keeps constant when changing the bending recording the height change at the effective bending region when changing the bending angle gradually, The structural evolution and buckling behavior has been investigated under the distinct ?abrupt? and ?gradual? buckling modes have been revealed in different the ?abrupt? buckling mode, the height of the bending ?point? has a sudden increase, and an abrupt transition from the uniform bending to buckling the ?gradual? mode corresponds to a gradual increase of the height at the bending ?point?, with a gradual transition from uniform bending to ?gradual? buckling results in a series of buckling intermediate formation.?Abrupt? buckling mode is mostly found for small diameter CNTs, while for large diameter CNTs, the ?gradual? mode is more the estimation of the wall numbers and thickness of CNTs, it was found that the CNTs with ?abrupt? buckling mode has smaller thickness diameter ratio than the CNTs with ?gradual? buckling critical buckling angle decreases with the increase of CNT diameter for the ?abrupt? buckling buckling behavior has also been investigated by molecular dynamics(MD) was found:(1)for all the CNTs studied, the SWNTs have “abrupt” buckling mode, and double and three walled CNTs take “gradual” buckling modes。從導(dǎo)致兩種屈曲模式的機(jī)理考慮，除直徑外，CNTs的層數(shù)對其屈曲行為也有重要影響，這預(yù)示了在CNTs的力學(xué)性質(zhì)中，存在不同于傳統(tǒng)尺寸效應(yīng)的雙尺寸效應(yīng)，即直徑和層數(shù)共同決定CNTs力學(xué)行為。而且SWNT的存在會對Si基底的AFM氧化有明顯的增強(qiáng)作用，相同條件下，表面有SWNT的Si氧化后產(chǎn)生的SiOx，比沒有SWNT時更多，這種增強(qiáng)作用有利于對SWNT的焊接固定。change the speed of the spinning change the speed of the spinning machine spinning machine head positioning the speed of the spinning machine principle: The system according to the deviation between the actual angle and setting angle of deviation of the location of the spinning machine(spinning machine)to adjust the speed of the spinning machine, spinning when the wire to the predetermined requires that the speed of the spinning machine adjustment and recovery speed of the process must be pleted before the wire head into the spinning remarksDevelopment of highspeed wire rod production to today39。s highspeed wire rod : highspeed wire rod mill。由一臺3200KW左右的調(diào)速電機(jī)經(jīng)兩級減速箱驅(qū)動。軋機(jī)兩架一組集體傳動，故叫“微型無扭軋機(jī)”。其要點(diǎn)是將剛出加熱爐的鋼坯的頭部與前一根鋼坯的尾部焊接起來進(jìn)行無頭軋制，從而消除頭尾的無張力段，尤其減少中間切頭和咬入事故，提高了成材率和金屬收得率，提升軋機(jī)生產(chǎn)效率。，但產(chǎn)品的品種質(zhì)量還達(dá)不到世界一流水平。線材不僅用途很廣而且用量也很大，它在國民經(jīng)濟(jì)各部門中占有重要的地位。4）由于軋輥質(zhì)量差，表面硬度不一或吐絲溫度過高，冷卻速度過慢，盤條表面受到嚴(yán)重氧化或鋼坯加熱不當(dāng)，局部或全部嚴(yán)重脫碳等原因造成產(chǎn)品表面麻面。也有現(xiàn)場采用全水平粗軋，中間軋件扭轉(zhuǎn)。粗中軋采用高剛度軋機(jī)，預(yù)精軋和精軋采用重型及超重型無扭軋機(jī)，為高線生產(chǎn)采用低溫軋制創(chuàng)造了條件。目前，常用的吐絲機(jī)頭部定位法有兩種：精軋前飛剪延時剪切；改變吐絲機(jī)運(yùn)行速度。s rapid economic development, the use of wire rod as raw material is increasing, growing social demand for highquality wire , due to the backwardness of the funds as well as smelting technology, only a few number of wire rod plant capable of producing highgrade wire products, China is not imported from abroad, a small part of the bead wire, steel wire strand, plated zinc wire and other hardline 39。對“小人物”寄寓有限的同情，但更多地傾注了對其劣根性哀其不幸，怒其不爭的抨擊。CNT被操縱以后，與基底相互作用力會有明顯減小，這使得CNT的有效彎曲區(qū)域，位于與基底只有vdW相互作用的被操縱部分，在AFM表征下表現(xiàn)為固定部分和被操縱部分的交點(diǎn)。某些SWNTs中，扭轉(zhuǎn)形變導(dǎo)致的對稱性破缺還會導(dǎo)致Raman模的分裂或新模的出現(xiàn)。(2)Under uniaxial strain, wRBM and wG+(E2(g))do not have noticeable response and the rest of the G modes in the range of 1590 cm1～1560 cm1 are downshifted.(3)Different Raman modes have different sensitivity to both and G+(E2(g))is more sensitive to torsion than other G under uniaxial strain, other G modes have larger sensitivity than RBM and G+(E2(g)).This is related to the correlation between the CC bond change and the atom vibrational displacement of different modes。扭轉(zhuǎn)和拉伸形變都會導(dǎo)致SWNTs拉曼模振動頻率的變化。在某些點(diǎn)對SWNT進(jìn)行焊接固定后，AFM操縱引入的形變的大小和分布可以被有效地控制，從而大大增加AFM操縱的可控性。他們在作品中描述小人物的悲慘命運(yùn)和內(nèi)心痛苦，從而使文藝成為“社會的一面忠實(shí)的鏡子”。development trends of the Hot Strip Mill production The wire is the minimum section size of a hotrolled material, wire rod rolling mill need to wire in the hot state circle, coil and the first delivery, it is also the 1960s, the midspeed wire rod mill and rolling and controlled cooling technology came with the wire production technology itself is getting more sophisticated and technological advances, highspeed wire rod mill product varieties and specifications range, plate weight, dimensional accuracy, surface quality and internal quality wire rod mill products than in the past have made great progress, and to better meet the needs of economic and technolo