次数

The characteristics of which are reduced bone content, degenerated microstructure of bone tissues, increased fragility of bone and chanciness of bone fracture.

论文单位第四军医大学，点击次数 19，论文页数 98页File Size12388K

The algorithm applied the characteristic of the small second item's degree of irreducible polynomial in characteristic 2 finite field.

该算法利用了特征为2的有限域中的不可约多项式第二项次数较小的特点。

Beijing airport records about 100 non- commercial charter flight movements a month, about twice the frequency in Tokyo.

北京的机场一个月有大约100次非民航包机活动，次数约为东京的两倍。

It used chebyshev polynomials to calculate sine function for improving its accuracy. It adopted optimized null vector distribution strategy to decrease switching times and switching current.

其采用Chebyshev多项式计算三角函数，提高了运算精度；采用零矢量象限间交错分布的优化策略，以减小开关次数，降低开关电流。

The feeding frequency of male crabs in unit time (30 seconds) is lower than that of the females because each male has only one minor cheliped for feeding.

摄食乃招潮蟹最常见的行为，她们利用小螯夹取表面土摄食其中的有机养分，而雄蟹只有一只小螯取食，其在单位时间内的进食次数比雌蟹少，此外，愈小的个体，吃得愈快。

Results By using optical microscope,the neurocytes of hippocampus in experimental group were observed to denaturalize,tumefy,destroy and disappear.And under electron microscope,the karyon was irregular,nucleoles deviated,chondriosome tumefied,crista collapsed,membrane was damaged,substance cavitated.Such changes were more evident with the increased paroxysm of epilepsy,the parameters between control group and operation group had no difference（P＞0.01）.But make a monofactorial variance analysis among cells' number,area,circumference and integral optical density in different groups,it showed that there were significant differences between optional two groups（P.01;at the same time,the more serious injury in hippocampus,the more powerful GFAP immunoreaction was.

结果： 实验组海马区光镜下可见神经细胞变性、肿胀、坏死及神经细胞脱失改变，电镜可见细胞核形态不规则、有切迹、核仁偏位、线粒体肿大、嵴断裂、膜破损和基质空化等改变，随癫痫发作次数增加上述改变越明显，对照组与手术对照组比较，各参数差异无显著性（P＞0.05），将不同组别大鼠细胞数、面积、周长、积分光密度分别作单因素方差分析，不同组别间均差异有显著性（P.01），同时观察到海马区GFAP免疫反应阳性的胶质细胞随海马损伤的加重而GFAP免疫反应增强。

The effects of water content and the added amount of triethylamine on peptide synthesis by immobilized enzyme were different from that of free enzyme. The catalytic efficiency of immobilized enzyme was better than that of free enzyme in most cases. The reuse times of immobilized α-chymotrypsin on MCM-22 are about 4-5 times.

结果表明，有机溶剂中含水量、三乙胺的加入量对自由酶与固载化酶的影响程度不同；多数情况下固载化酶的催化效果优于自由酶；吸附固载化酶的重复使用次数有限。

The therapeutic effect of newtype semiconductor laser is reliable. In addition, the manipulation is simple and quick with no complications like trauma, hyperpigmentation and cicatricle etc, which is clinically ideal depilating method at present.

新型固体二极管半导体激光脱毛效果可靠，操作简单，速度决，无损伤、色素沉着及瘢痕等并发症，是目前临床上理想的一种脱毛方法，但所脱毛发的部位不同，毛发的粗细、颜色深浅的不同，所需的能量与次数也不同。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

This paper proposes to make use of the probability circle method used for missile accuracy evaluation in the AUV s guidance accuracy assessment.

该方法根据批次试验中，落入对应一定概率的概率圆中的次数做出该批次产品是否满足制导精度的判断，并给出使用方和研制方的风险分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。