vacuum [`'vækjuəm]

vacuum的基本解释

n.

真空, 空间, 真空吸尘器

• The porter turned off the vacuum.
• 清洁工关掉真空吸尘器。

• We could not pull apart two plates which enclosed a vacuum.
• 如果两个盘子间是真空，我们就无法将它们分开。

• Her death left a vacuum in his life.
• 她的去世给他的生活留下一片真空。

• Her husband's death left a vacuum in her life.
• 她丈夫的死使她的生活变得空虚。

vt.

用吸尘器打扫

• I vacuumed my room yesterday.
• 昨天我用吸尘器清扫了房间。

adj.

真空的, 产生真空的, 利用真空的

vacuum的同义词

v. sweep · clean

n. vacuity · void

vacuum所属的单词分类

Astronomy / 天文 [220]

white giant  ·  visual magnitude  ·  red dwarf  ·  pole star  ·  outer planets  ·  orbital inclination  ·  orbital eccentricity  ·  muttnik  ·  interstellar dust  ·  inner planets

与vacuum相关的网络例句 [注：此内容来源于网络，仅供参考]

Its main products include vacuum sinteringVPS series, vacuum brazing furnace VBF series, vacuum sintering furnace VSF series , vacuum sintering furnace with high temp VQS series, vacuum furnace of many continuous heating chambers with VTC model, vacuum gas quenching furnace high pressure VQG series , vacuum VPG series pressurized furnace with gas, vacuum brazing furnace VBF series, vacuum vertical furnace VUF series, vacuum annealing furnace VAF series, vacuum tempering furnace VTF series, directional orystal vacuum melting furnace VDC series, vacuum VIF series induction melting furnace, semi-continuous vacuum induction melting furnace SVIF series, vacuum VHT series stortage kettle, etc., all of which have been widely used in materials, metallurgy, machinery, electron, aviation and other fields the like.

目前公司的主要产品有VQS系列高温真空烧结炉、VPS系列真空烧结炉、VBF 系列真空铝钎焊炉、VQB 系列高温真空铝钎焊炉、VQG 系列高压气淬炉、VTC 系列多室连续真空烧结炉、VUF系列立式真空烧结炉、VAF 系列真空退火炉、VHF 系列真空热处理炉、VDC 系列定向结晶炉、SVIF系列半连续真空感应熔炼炉、HJX系列真空焊接箱、QF系列高真空气动挡板阀，GQ系列真空球阀等，产品广泛应用于材料，冶金、机械、电子、食品、航空等领域；对系列外的产品公司可以根据用户的具体情况进行非标设计；最大程度地满足用户的要求；公司对自产真空炉产品保修一年，终身维护；同时提供对外真空设备改造，技术支持，维护维修等服务。

At present, Hengjin has produced more than 600 sets of high vacuum agglomerating furnace, high pressure air quenching furnace, high vacuum brazing furnace, high vacuum annealing furnace, vacuum annealing equipment, vacuum nitriding equipment, vacuum crystallizer, vacuum fast quenching equipment, vacuum melting equipment, vacuum storing equipment, vacuum operation box, vacuum dryer, etc.

恒进真空已先后研制了高真空正压烧结炉；高真空高压气淬炉；高、低温真空钎焊炉；真空退火炉；真空速凝铸带炉；真空回火炉；真空晶化炉；真空破碎炉；真空储藏柜；真空操作箱；真空干燥器；真空保鲜室和真空镀膜机等真空设备，客户遍布全国二十多个省市，并远销到韩国、泰国、越南、朝鲜、伊朗等国家。

In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程，得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符，它隐含了胶子作用，并且准确至流-流耦合项；接着，通过参数化哈密顿量中的夸克作用关联核，导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程；随后，应用公式，编程求解，考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚，在计算中保留了空间流-流耦合作用；之后，导出瞬时势和延迟势下包含二体作用项的哈密顿量公式，并采用单体化近似，通过泛函变分方法得到核物质存在时耦合的非线性动力学方程；在保留部分空间双流耦合作用的近似下，求解核物质的动力学方程，考察核物质密度对真空凝聚的影响，以往考察真空凝聚，对关联核的选用，由于空间流-流耦合项不易处理，也认为作用不大，常忽略该项，并且常采用瞬时作用；本文保留空间双流项和部分延迟作用，考察了真空情形的夸克对凝聚，还考察了夸克质量对纯真空凝聚的影响，以往对核物质存在情形的真空凝聚考察很少，也都忽略空间流-流项，本文在考虑部分空间流-流项近似下，考察了核物质存在对真空凝聚的影响。

与vacuum相关的网络解释 [注：此内容来源于网络，仅供参考]

vacuum：真空

玻:我还要告诉你,所谓"波粒二象性的迷惑"在量子场论(quantum field theory)中,通过场的算符化(quantization of field)等手段,已经获得解决.玻:有点道理.Whittaker就主张,既然真空里各种纷乱杂陈,"真空"(vacuum)之名,显然名不符实;

vacuum：真空;负压

Velashape集合了以下技术:双极射频(Bi-Polar RF)穿透皮肤深层5-15mm,集中加热脂肪细胞层;红外光(Infrared Light)最宽的红外光波长700-2000nm,增加皮肤弹性,平滑凹凸表面;真空负压(Vacuum)增加血液循环,促进细胞新陈代谢;

vacuum：真空度

自动上料烘干机、液体灌装机、粉末灌装机、电焊设备、电影机械、纸张运送、干洗衣服、清洁用途、空气除尖、干瓶、气体传送、送料、收集等方面型号(Model)额定功率(Power)额定电源(Voltage)最大风压(Pressure)真空度(Vacuum)最大风量(Outp

vacuum：吸尘器

经过检查,电子邮件吸尘器(vacuum)非常高明和不显眼,并且已经秘密地偷取他们的数据达几个月时间了. 它使用一个"root kit",这是一个用别名替换标准Linux命令的方法,从而实现程序伪装以盗取数据. 这样进程命令"ps"就被替换成"ps|grep i vacuum",

vacuum pump：真空泵

真空泵(vacuum pump)是用各种方法在某一封闭空间中产生、改善和维持真空的装置. 真空泵可以定义为:利用机械、物理、化学或物理化学的方法对被抽容器进行抽气而获得真空的器件或设备.