根

N algorithm for close approach determination was developed by Alfano and Negron （1993） based on polynomial splining techniques.

lfano—Negron（1993）提出的空间目标接近分析算法将最小相对距离及其对应时刻和进出误差椭球时刻的求解问题均转化为插值多项式求根问题。A—N算法在判断三次多项式根的存在性、筛选合理实根时存在缺陷，可能导致多余计算。

Objective: To assess the sealing ability of three root canal sealers by a new quantitative method using glucose.

目的 ：用葡萄糖定量法检测根管微渗漏的模型评价 3种根管封闭剂封闭根管的能力。

Rhizome erect or obliquely ascending, short, 0.5-3 cm, slender, with numerous white rootlets, sometimes with underground stolons; roots elongating, producing new individuals.

根状茎直立或斜升，短，0.5-3厘米，纤细，具多数白色细根，有时具地下匍匐茎；根拉长，生产新个体。

Results Direct signs of brachial plexus pre-ganglionic injury included lack of nerve root,rupture of nerve root,and rupture of partial cercical rootlets.

结果臂丛神经节前损伤的直接征象包括神经根缺失、神经根断裂、神经根部分根丝断裂；间接征象包括创伤性脊膜囊肿、硬膜囊变形、脊髓表面部分裸露等。

Fenestration laminectomy of L3、5 and part of S1 was performed and the lower threshold dorsal rootlets of L2、3、5、S1 were selectively sectioned judging by electrical stimulation on the patients with lower extremities involved. Open-door laminaplasty of C5-7 and selective posterior rhizotomy of C5-8 were performed on 5 patients with upper limbs involved simultaneously in half a year. For 2 patients with lumbar stenosis or protrusion of intervertebral disc or unstable lumber, internal fixation of pedicle screw was performed while SPR.

针对下肢痉挛患者采用L3、L5及部分S1椎板开窗，通过电刺激测阈值法选择性切断部分L2、3、5，S1脊神经后根；5例合并上肢痉挛瘫患者半年后采用颈后C5~C7单开门法，选择性切断部分C5~C8脊神经后根。2例合并腰椎不稳定、椎管狭窄及腰椎间盘突出，则术中在行SPR的同时行椎管减压，突出椎间盘髓核摘除，并行经椎弓根内固定。

Through observing of the ectomycorrhizal exterior forms and tissue sections, we found there were mantle of fungi tissue which enclosed the root, emanating hyphae of the rhizoplane, and the Hartig net which was formed by the hyphae between the epidermal and cortical cells.

035、044、GT005、LH008。通过6种外生菌根及其组织切片的观察，发现菌根根表具有外延菌丝和菌丝套，在细根皮层细胞间形成哈蒂氏网，证明这6种外生菌根真菌与白桦幼苗建立了共生关系。

The compensation effect of water stress only was observed in the percentage distribution values in fine roots of RAWS plants, which kept significantly higher than that of CK during rewatereing. However, there apparently was an after-effect of water stress, as revealed by the delayed recovery of almost all of the three parameters in RAWS plants.

水分胁迫解除期间，细根获得同化物百分比仍保持在显著高于对照水平，表明水分胁迫对细根具有一定的补偿效应；尽管茎尖、粗根、韧皮部、木质部获得的同化物绝对量、相对量及分配系数均在复水后5天内完全恢复，但它们起始恢复的时间大多与复水并不同步，而是表现出一定程度的滞后，表明水分胁迫对这些器官同化物分配过程具有后效作用。

Methods Two hundred and forty-six teeth with chronic apical pulpits without previous treatment were selected and randomly divided into 2 groups.

根管消毒是根管治疗的一个重要步骤，药物消毒是目前国内临床根管消毒最为普遍采用的方法。

Keeping this in mind, a study was undertaken to determine the effect of CA on early growth of mung bean (Phaseolus aureus=Vigna radiata), morphogenetic response in hypocotyl cuttings of mung bean, and changes in the activities of some associated enzymes – proteases, polyphenol oxidases, and peroxidases – and endogenous total phenolics at root initiation (third day; 48 h; appearance of root primordia; RI), root expression (fifth day; 120 h; appearance of roots; RE), and post-expression (seventh day; 168 h; PE) stages of rhizogenesis.

保持这一点，一项研究，以确定影响钙对早期生长绿豆（ phaseolus金黄色葡萄球菌=豇豆拉迪雅塔），形态发生反应，下胚轴插条绿豆，和变化，在活动的一些相关的酶-蛋白酶，多酚氧化酶，过氧化物酶-和内源性总酚的从根本上启动（第三天； 4 8小时；外观根原基；里），根的表达（第五天； 1 20改为H级；外观根；转口），和后表达（第七天； 168改为H级； PE ）的阶段rhizogenesis 。

The invention relates to an electric machine (10) which can be operated as a motor or a generator. Said machine comprises a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of electromagnet components (28) that are statically arranged in the housing at a distance from the axis of rotation of the rotor in evenly distributed angular distances. Said electromagnet components have each a wire-wound coil (30) consisting of a coil core (32) which carries one or more conductors.

本发明涉及一种可作为电动机或发电机工作的电机(10)，它包括一个可旋转地安装在外壳(12)内带一根伸出外壳(12)的转子轴(24)的转子(26a、26b)，以及包括多个离转子旋转轴线一定距离处按均匀的角向间距位置固定地布置在外壳内并各有一个支承着由一根或多根导线组成的线圈绕组(30)的线圈芯(32)的电磁构件(28)。

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。