密度大的

This dissertation is concerned with some problems regarding the asymptotic property of nearest-neighbor density estimator for α—mixing and nagetive quadrant dependent samples. The results extend the corresponding theorems in i.i.d.

本文主要考虑了最近邻密度估计在α—混合序列和两两NQD混合序列情形下的大样本性质，推广了独立同分布和其它相依情形下最近邻密度估计的大样本性质，如相合性、渐近正态性等。

Furthermore, a new method is adopted to coordinate the maximum stand density line, which is integrated with the normal growing stoc...

同时，将最大密度线与标准表统一起来，提出了配合最大密度线的新方法。

The newly developed cement slurry system owned such advantages as stable performance, minimum influence of density changes on its performance, good lost circulation control, fast development of early strength, etc.

但低密度水泥浆体系凝结时间长、早期强度低；在低密度水泥未形成强度前，活跃的地层流体已经渗入水泥浆中，破坏了水泥浆体系的稳定性。此外，按现场实际情况来分，水泥浆密度大

Results CT showed a intrapelvic mass of rectal wall or surrounding soft tissue with inequality of size, relation closeness with intestinal wall; rectall wall different degree compression and narrowing,and extruding surrounding tissue.Below 5cm tumor density were slightly reduced,but symmetrical. Exceed 5cm tumor moderately enhanced, but asymmetrical. CT value of major mass were 25-35Hu, with boundary zone nodule enhancement, contrast-enhanced CT value 50-60Hu, and centricity necrosis.

结果 （1）盆腔内直肠壁或直肠周围软组织肿块，大小不等，肿块与直肠壁关系密切；（2）直肠不同程度的受压、变窄，肿块主要向直肠腔外生长，对周围组织产生推挤压迫；（3）径线在5cm以下肿瘤平扫时密度稍低，但均匀，增强时表现为中等度均匀强化，无坏死；径线在5cm以上10例肿块密度平扫时呈稍低密度且不均匀，CT值25-35Hu，增强时较大的肿瘤边缘带中等度结节样强化，CT值50-60Hu，肿块中心部分无强化，呈坏死样改变。

Single-axis acoustic levitation of the heaviest solid (iridium, p = 22.6g/cm3) and liquid (mercury, p = 13.6g/cm3) on the earth is achieved by greatly enhancing both the levitation force and stability through optimizing the geometric parameters of the self-developed single-axis acoustic levitator.

对自行研制的单轴式声悬浮器进行了优化设计，极大地提高了悬浮力和悬浮稳定性，首次悬浮起自然界中密度最大的固体铱(I-r，密度22.6g／cm~3)和液体汞(Hg，密度13.6g／cm~3)。

The heaviest solid (iridium, density r s = 22.6g/cm3, size f 4mm) and liquid (mercury, density r s = 13.6g/cm3, size f 5×2mm ) on the earth is acoustically levitated by greatly enhancing both the levitation force and stability through optimizing the geometric parameters of the self-developed single-axis acoustic levitator.

以上述理论为指导，对自行研制的单轴式声悬浮装置进行了优化设计，显著提高了悬浮力和悬浮稳定性，悬浮起自然界中密度最大的固体铱（ Ir ，密度 r s =22.6g/cm3，尺寸 f 4mm ）和液体汞（ Hg ，密度 r s =13.6g/cm3、尺寸 f 5×2mm ）。

The result of clustering based on quantitative data of vessel elements suggests that the Sonneratia species evolved into two clades, one including S. caseoalris and S. paracaseolaris that has the wider vessel and lower pore density suggesting a high conducting efficiency, the other including S. alba, S. ovata, S. apetala and S. hainanensis that has the narrower vessel and higher pore density resulting in high conducting safety.

导管数量特徵的聚类分析可以推测海桑属植物沿两支进化，一支进化为水分输导效率高的种类（即导管直径宽和输导面积大，管孔密度小，如海桑和拟海桑），另一支进化为水分输导安全性高的种类（即导管直径窄、输导面积小，管孔密度大，如杯萼海桑、卵叶海桑、无瓣海桑、海南海桑）。

The result of clustering based on quantitative data of vessel elements suggests that the Sonneratia species evolved into two clades,one including S. aseoalris and S.paracaseolaris that has the wider vessel and lower pore density sug esting a high conducting eficiency,the other including S.alba,S. ovata,S.apetala and S.hainanensis that has the narrower vessel and higher pore density resulting in high conducting safety.

导管数量特征的聚类分析可以推测海桑属植物沿两支进化，一支进化为水分输导效率高的种类(即导管直径宽和输导面积大，管孔密度小，如海桑和拟海桑)，另一支进化为水分输导安全性高的种类(即导管直径窄、输导面积小，管孔密度大，如杯萼海桑、卵叶海桑、无瓣海桑、海南海桑)。

Geophysical characteristics of Ordovician carbonate rock were studied using drilling data. Impedance is affected mostly by material properties and reservoirs types, to a negligibly extent by lithology and flow. Compact layers and minor\|fracture reservoirs of Ordovician carbonate rock have characteristics of high density, high velocity and high impedance, and the prediction of minor fractures reservoir is difficult by the general seismic ways. Big fractures and fractured\|vuggy and vuggy and cavity reservoirs of Ordovician carbonate rock have characteristics of minor density and low velocity and low impedance in central Tarim basin, which obviously different from the surrounding rock and produce obvious characteristics in seismic data, so reservoirs can be predicted by applying general seismic data.

根据已钻井资料，对塔中地区上奥陶统良里塔格组岩石地球物理特征进行了研究，结果表明：物性、储层类型对波阻抗影响最大，岩性、流体对波阻抗影响较小；奥陶系碳酸盐岩致密层和小裂缝型储层具有密度大、速度高、波阻抗值大的特点，利用地震常规预测手段较难预测出小裂缝型储层，而塔中地区奥陶系碳酸盐岩大裂缝型、裂缝-孔洞型、孔洞型、洞穴型储层具有密度小、速度低、波阻抗值小的特点，与围岩具有较为明显的差异，在地震上可以产生明显的响应，可利用常规地震资料来预测这种类型储层。

Results: In the 13 cases, the CT diagnosis show that five cases of low-density lesions of Bilateral hepatolenticular, five cases of globus pallidus, one case of Bilateral hepatolenticular with corpus callosum, one cases of External capsule putamen, one case of Putamen with the caudate nucleus, three cases of low-density of Bilateral lobi frontalis and lobi parietalis, one case of unilateral putamen hemorrhage, three cases of cerebral atrophy.

目的 探讨双侧基底节区对称性低密度病变的CT诊断价值。方法回顾性分析肝豆状核变性5例、中毒性病变5例、Wernicke脑病2例、Huntington氏大舞蹈病1例的CT平扫表现及临床意义。结果 13例中，CT示双侧豆状核低密度5例、苍白球5例、双侧豆状核伴胼胝体1例、壳核伴外囊1例、壳核伴尾状核1例；双额顶叶低密度3例、单侧壳核出血1例、大脑萎缩3例。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。