查询词典 s-trap

Here we have discussed the Casimir force of Maxwell-Chern-Simons gauge field and obtained the new results, namely the contribution of force of M-C-S gauge field to the Casimir force zero temperature, the radiative correction to the Casimir force of M-C-S gauge field at zero temperature and Casimir force of M-C-S gauge field at finite temperature between two parallel ideal conducting wires.

本文讨论了两个平行的，理想的金属线之间Maxwell-Chern-Simons规范场的Casimir效应。不仅得到了绝对温度下自由的M-C-S规范场对Casimir力的贡献，而且得到绝对温度下M-C-S规范场的真空涨落对Casimir力的辐射修正以及温度对M-C-S规范场的Casimir力的修正，并且分别考虑了无质量极限，低质量极限和高质量极限情况。

By using properties of quasi-regular semigroups and left central idempotents, some statements are proved. Let S be a quasi-right semigroup, then (1) S is a quasi-completely regular semigroup;(2) RegS is a completely regular semigroup;(3) R(superscript *) is the smallest semilattice congruence on S;(4) Each R-class T(subscript α) on RegS is a right group;(5) T(subscript α)G(subscript α)×E(subscript α), where G(subscript α) is a group, E(subscript α) is a right zero semigroup.

利用拟正则半群和左中心幂等元的性质，证明了S为拟右半群时，(1) S为拟完全正则半群；(2) RegS为完全正则半群；(3) R为S上的最小半格同余；(4) RegS上的每个R-类T为右群；(5) TG×E，其中G为群，E为右零半群。

It was found that the binaphthyl backbone of S configuration was matched to the S, S pyrrolidino group. In this case, the asymmetric allylation product could be obtained in 85. 6% ee.

轴手性是S构型时，和中心手性S，S构型相匹配，它和钯形成的络合物在催化烯丙基取代反应时，取得了比不含中心手性因素的吡咯烷基氮膦配体高得多的对映选择性，可以得到85.6％ee值的产物。

Is a small freshwater alga suitable to live in an environment where both water temperature and light intensity is relative low. The optimum water temperature of 15℃ and the optimum light intensity of 35μmol/m^2s~45μmol/m^2 s are needed for photosynthesis of Batrachospermum longipedicellatum.

其光合作用的最适水温为15℃，光合作用的适宜光强为30μmol/平方公尺s~50μmol/平方公尺s，最适光强度为35μmol/平方公尺s~45μmol/平方公尺s，40μmol/平方公尺s光合速率最高峰，为其饱和光强。

Results show that the G and S units of wheat original lignin consist of 25. 35mol% uncondensed G units, 17. 60mol% uncondensed S units and 37. 05mol% condensed G units. The dissolution rate of S units is faster than that of G units in SFP—AQ and AP—AQ cooking. The residual lignin in SFP pulp has smaller amount of DPM structure and thus has better bleachability compared with those in AP pulp.

研究结果表明麦草原本木素G和S单元由25.35mol％的非缩聚G单元，17.60mol％非缩聚S单元和57.05mol％的缩聚G单元组成；在SFP—AQ和AP—AQ蒸煮中，木素S单元的溶出速率大于G单元的溶出速率；与AP浆比较，SFP浆中残余木素含有较少的DPM结构，从而具有较好的可漂性能。

If G is a {2K_1+K_2, C_4}-free graph, we show thatifα＞3 then G is a split graph, and ifα=3 then for any independentset S of cardinality 3, G-S is a chordal graph or G-S?

如果图G不含与4-圈和2K_1+K_2同构的导出子图，我们证明了如果α＞3，那么G是一个split图；如果α=3，那么对于G的任一个有三个元素的独立集S，G-S是一个弦图或者G-S？

The main characteristics include: the quiet Sun corona has a rapid response to the flare heating, within 2 second the corona temperature increases nearly one order of magnitude, but later such increase becomes very slowly; the downward velocity at early stage of impulsive phase is too small to be negnected; chromospheric evaporation made by conduction shows some intensely, the maximum evaporated velocity may be as large as 1000 km/s; the chromospheric condensation appears just when the chromospheric evaporation takes place and its place always coincide with that of transition region in the early stage; the maximum of chromospheric condensation occurs also in the early stage of impulsive phase, at which the density in condensation may be larger two order of magnitude than that of surround and the downward velocity may be as large as 100 km/s; after the maximum of chromospheric condensation, its strongth decreases gradually but its width becomes greater with time and have a tendency to transport into deep chromosphere; the front of chromospheric condensation heats atmosphere obviously and the temperature in the chromospheric condensation is higher than the original case; the downware velocity of transition region may be greater than 100 km/s at the early stage; when the evaporated material collide at the top of loop, the densityand the presure there increase rapidly, which result in the formation of a shock wave; and so on.

在改善色球辐射损失和精确分辨过渡区的基础上，通过联立求解连续性方程、动量方程和能量方程，构造了一维磁限制性耀斑环在热沉积作用下的大气动力学模型，获得了耀斑热模型下脉冲相早期较为细致的大气演化理论图象，其主要特征是：耀斑对宁静日冕的加热相当迅速，仅2秒钟日冕温度增加即达一个量级，之后日冕温度增加缓慢；脉冲相早期日冕向下速度很小，几乎可以忽略，热传导驱动色球蒸发，其过程较为激烈，蒸发极大速度可达到1000km/s；色球压缩区与色球蒸发几乎同时形成，且在早期其位置总是与过渡区位置重合；色球压缩极大发生在脉冲相早期，其时密度可高于周围约2个量级，向下速度可超过100km/s；色球压缩极大后，其强度逐渐减弱，但宽度明显增大，且渐渐脱离过渡区往色球传播；压缩区内物质温度要高于原先的大气温度；过渡区下降在脉冲相早期相当迅速，可超过100km/s；当蒸发物质在环顶高速相碰时，环顶的密度、压力迅速增大，且温度也有所增加，导致形成激波，其波面以每秒上百公里的速度自环顶向下传播；在脉冲相前期，日冕软x辐射对色球的加热作用可以忽略；等。

Comparing with real engineering, analyze the experiment and simulation results, the conclusion is that the mixture model can simulate the flow field of gas-liquid two-phase well; the effect of plain plug flow aeration is better than circumvolve plug flow aeration's; for the same plug flow aeration , the effect of 20m/s aeration is better than 10m/s's and

结合实际工程的运行，对实验结果及模拟结果进行对比分析，结论为：采用混合模型能够很好的模拟曝气池内气液两相流的流场；平移推流式曝气比旋转推流式底层曝气的曝气效果好；在同种曝气方式，相同工况下，20m/s的曝气速度的曝气效果要比10m/s、30m/s的曝气速度的曝气效果好。

Two ends of s shape bent waveguide respectively coaxially link perpendicular waveguide input and output section.

直波导输入输出段、S形弯曲坡面结构、长方体结构和平面光传输波导位于基版的表面，S形弯曲波导位于S形弯曲坡面结构的表面，直波导输入输出段位于长方体结构的表面，基版上的直波导输入输出段和位于长方体结构上的直波导输入输出段通过S形弯曲波导连接，S形弯曲波导的两端分别与直波导输入输出段同轴相切相接。

The structure and stability of all possible isomers of C50X(X=SiH2, PH, S) were investigated by ab initio HF/3-21G calculations. The calculation results indicate that the preferred position for cycloaddition of SiH2, PH, and S on C50 is consistent, i.e. on the C3-C4 and C4-C4 sites of C50, and the resultant most stable cycloaddition isomers are [5,6]-closed and [5,5]-closed structures. The main driving force governing the stability of the C50X(X=SiH2, PH, S) isomers is the strain, or the conjugative effect, or the combination of strain and conjugative effect, depending on the addition positions and the types of the attacked C-C bonds.

用从头算HF/3-21G方法研究了C50的环加成衍生物C50X(X=SiH2， PH， S)所有可能的异构体的结构与稳定性，计算结果表明，SiH2基团、PH基团与S原子在C50上环加成的优先加成位置相同，都为C3-C4类键和C4-C4类键，并且相应形成[5，6]-闭环和[5，5]-闭环结构的最稳定异构体；决定C50X(X=SiH2，PH，S)各异构体稳定性的主要因素，因加成位置以及发生加成反应的C-C键的单双键类型的不同，可能是张力、共轭效应或者二者的共同作用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。