几何基础

The geometrical characteristics analysis of grain is the important base of metallographical analysis.

晶粒的几何特征度量是金属性能分析的重要基础。

Structure and spectral characteristic s of Diels-Alder type adducts from Morus;2. With the Taibei salt refinery of Lianyungang City as an example, an analysis was made of the spectral characteristic s of different kinds of substances detected in salt fields.

以连云港台北盐场为例，分析了盐田内各类实测的地物光谱特征；对2000年的遥感影像数据进行大气校正和几何校正；再利用主成分融合技术，将多波段的ETM影像与对应的全色波段影像进行主成分融合，在此基础上进行盐田水体分类。

Based on many previous studies of the Buqin Mountain, A′nyêmaqên and Kuhai-Sêrtang ophiolitic mêlange zones in the junction between the two orogenic belts and through further survey and isotope chronological study, the authors find that the three ophiolitic mélange zones are not independent but form a typical triple junction with respect to the composition, textures and structures, geometry and isotope chronology, i.e. the Qinling-Kunlun triple junction.

本文在前人对发育于两造山带衔接区的布青山、阿尼玛卿以及苦海—赛什塘3条蛇绿构造混杂带大量研究的基础上，通过进一步的调查以及同位素年代学研究发现，这3条蛇绿构造混杂带并非相互独立存在，它们在物质组成、结构构造、几何形态、同位素年代学特征上构成较为典型的三向联结构造，即秦—昆三向联结构造。

Then on the base of photoisomerization of azobenzene molecules,we get thelong-rang order hexagonal symmetry and rectangular symmetry microstructures in theazobenzene polymer film(2μm),induced by optical lattices.

在此基础上，根据偶氮分子的光致几何异构的特性，在偶氮苯有机聚合物薄膜(2μm)中得到了长程有序的六角对称微结构和矩形微结构。

For 9 pyrazole compounds,their geometry and electronic structures were analyzed by means of natural bond orbital theory;their reactivity was analyzed by electrostatic potential distributions,heats of formation and Bader density were also calculated.

在最稳定几何构型基础上，基于自然键轨道理论，分析了稳定结构的成键情况和吡唑环上的共轭性；用静电势图分析了吡唑化合物的反应性；理论估算了9种化合物的标准气态生成热和Bader密度；最后采用VLW方程计算了这些化合物的爆速、爆压。

For 9 pyrazole compounds, their geometry and electronic structures were analyzed by means of natural bond orbital theory; their reactivity was analyzed by electrostatic potential distributions, heats of formation and Bader density were also calculated. After that, detonation velocities and Chapman-Jouguet pressures of these compounds were given by means of VLW equation.

在最稳定几何构型基础上，基于自然键轨道理论，分析了稳定结构的成键情况和吡唑环上的共轭性；用静电势图分析了吡唑化合物的反应性；理论估算了9种化合物的标准气态生成热和Bader密度；最后采用VLW方程计算了这些化合物的爆速、爆压。

Keywords : solubility parameters apparent solubility parameters chromatographic fingerprint total quantum geometrical average retention time aloe-emodin rheic acid archen physcione HPLC compatibility rule reform t of the single flavor TCMM.

cm-3/2。结论：HPLC指纹图谱总量几何平均保留时间法能同时测定多个成分及总量的表观溶度参数，这对研究中药的配伍溶解规律，单味中药剂改工艺研究奠定理论基础。

Autocorrelation topological study on the acute toxicities of substituted aromatic compound s;2. The autocorrelation topological researches on slow and acutetoxicities of substituted aromatic compound s to scenedesmus ubliquus, rat and so on;3. Results show that the SW and KOW of the substituted aromatic compound s could be better forecasted at AM1 level.

应用分子力学方法MM+和半经验量子化学AM1、MNDO和PM3法得到了54种取代芳烃的优势构象，在此基础上结合分子图形学技术，获得相应优化构象的电子结构参数和几何结构参数，并将这些参数与取代芳烃的辛醇/水分配系数和溶解度相关联。

The theoretical properties of BTATz were estimated by a B3LYP method based on 6-31G basis set. The stable geometric configuration and bond order were obtained. The vibrational frequencies, IR spectrum and thermodynamics properties under different temperatures were obtained from vibrational analysis, and the relationship between temperature and thermodynamics properties was deducted. Pyrolysis mechanism of BTATz was discussed, and the transition state and activation energy of ring opening reaction of the tetrazole were deducted.

用B3LYP方法，在6-31G基组水平上对其性能进行了计算，得到了其稳定的几何构型和键级；在振动分析的基础上求得体系的振动频率、IR谱及不同温度下的热力学性质，并得到了温度对热力学性能影响的关系式；探讨了其热解机理，推断出四唑环开环时的过渡态和活化能。

The geometrical structures of thioindigo chromophores were studied at the B3LYP/6-31+G level of density functional theory.

在密度泛函理论的B3LYP/6-31+G*水平上对硫靛染料发色体的几何结构进行优化计算，在获得基态稳定结构的基础上，应用含时密度泛函理论方法在相同水平计算电子吸收光谱。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。