上段

STUDY DESIGN: Systematic review of published incidence of radiographic adjacent segment degeneration and symptomatic adjacent segment disease after arthrodesis or total disc replacement.

研究设计：系统性回顾出版物中报道的椎体融合术和椎间盘置换术后在X射线上邻近节段退变和有症状的邻近节段疾病的发生率。

Preliminary studies on affinity isolation based on the specific combination between Biotin and Avidin Presently, affinity chromatography is increasing to be a main protein isolation and purification technique for a complicated system because of its high specificity, high rate of recovery, etc.

利用生物素和抗生物素蛋白间的特异性结合作用，将生物素通过化学反应键合到蛋白质的某种官能团上，酶解后的肽段通过固定了抗生物素白蛋白的亲和分离凝胶色谱柱，可以选择性地分离生物素化的肽段，达到简化复杂体系的目的。

In many applications, it is desirable to analyze the parametric curves for undesirable features like cusps and inflection points.

为了便于对参数曲线段的形状控制和几何特征的进一步认识，在许多的实际应用中，需要分析参数曲线段上有无多余拐点和奇点，如果有就要消除它。

An arbitrary shaped line current on a horizontal plane is divided into many small line segments and approximated by Hertzian diploes, then both the near and far EM-field of the line curennt is approximated by the summation of the complete near and far fields of Hertz dipoles.

水平面上任意形状线电流分割为许多小段之电流，每一小段之电流近似为赫芝偶极，则在三度空间任意座标平面上无论远近之电磁场即可以赫芝偶极之远近完整电磁场加总合成近似之。

Based on the study of K1 qn 1 source rock development and hydrocarbon-expulsion characteristics, overpressure and its distributing characteristicss, T2 source fault and its distributing characteristics of Fu-Yang oil layer in Sanzhao depression, the match of source rock, overpressure and fault and its controlling effects on hydrocarbon accumulation and distribution have been studied.

在综合研究三肇凹陷青一段源岩发育及排烃特征、超压及分布特征和T2源断裂及分布特征源岩、超压和断裂空间匹配关系对油成藏与分布控制作用的基础上：认为青一段源岩和其内超压空间匹配控制着三肇凹陷扶杨油层油成藏分布范围，超压和T2源断裂配置控制着扶杨油层油聚集深度和层位，超压和T2源断裂平面配置控制着扶杨油层油聚集的部位。

Based on the data of directional core drilling, FMI, routine cores and their thinsections, we have described the characteristics of H3 reservoir in Anpeng oil field, Miyang sag. By analyzing the stable isotopes of 20 fracture infillings and 5 groups of acoustic emission, combined with the studies of fracture characteristics and tectonic evolution, the fractures in H3 member were assigned to the regional fracture type which is characterized by the dominance of vertical or highangle extensional fracture, occurring in groups, relatively stable occurrences and out of the control of local nosetype folds. It has been recognized that there are 4 breaking stages, of which the 2nd one is the major stage.

根据定向取心、成像测井、常规岩心及薄片资料对安棚油田核三段储层天然裂缝特征进行分析的基础上，通过对20个裂缝充填物的稳定同位素测定，5组样品的声发射实验，结合岩心裂缝特征、地质构造历史等，确定出核三段地层中裂缝为区域性裂缝，以垂直或高角度张性缝为主，成组出现，产状稳定，不受局部鼻状构造控制，确定出裂缝有4个破裂期，主要破裂期为第二期。

Second, by making use of BP algorithm model's function of pattern classification and recognition, the paper forecasts the possibility of the leakage accident in the pipeline network, and establishes a nonlinearity relation model between the variety factors that affect the leakage accident and the water leakage dangerous coefficient.

其次，在平差计算的基础上，利用BP算法模型的模式分类和辨别功能，对管网发生漏损事故的可能性进行模拟预测，建立了影响管网中管段发生漏损的多种因素和管段危险系数之间的非线性关系模型。

Aiming at the specific mission that intercept the warhead of tactical ballistic missile, the new issue for designing the guidance law is analyzed, and a new guidance method that fit for the mid-course is presented, based on the idea of predicting the intercept point.

针对拦截战术弹道导弹这一特殊任务，分析了导引律设计面临的新问题，提出了以预测拦截命中点为思想的中制导段导引方法，研究了末制导段比例导引律弹道形状和过载分布特点，在此基础上为了改善比例导引律的缺陷，引入了目标机动加速度和导弹轴向加速度等信息，对比例导引律进行了修正，并对导引律中各参数进行了优化。

According to these research, I divide the development of Sichuan lacquer wares into five stages: the early of the Warring States Period, from the mid-period of Warring States Period to early of Western Han Dynasty, from the mid-period of Western Han dynasty to early of Eastern Han Dynasty, the mid and late of Eastern Han Dynasty.

在此基础上，本人将战国秦汉时期的四川漆器分成四期五段，即战国早期、战国中晚期至西汉早期(分战国中晚期至秦和西汉早期两段)、西汉中晚期至东汉初期、东汉中晚期。

This research will enrich and expand the environmental geochemical research contents of mid-upper reaches of yellow river, and has theoretic and practical meaning on Inner Mongolian water sources protection and reasonable utilization.

本文把黄河内蒙古段干流水体作为重点研究区段，采用三因子分别评定的方法，将上覆水，悬浮物及沉积物作为有机整体，对黄河内蒙古段水、悬浮物、底质中砷和汞的总含量和各形态含量进行了综合评价。

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％。