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We explicitly derive a domain of attraction for the positive equilibrium of system by using Liapunov method. We also investigate Hopf bifurcation by using Hassard method. Finally, some numerical simulations are made for system.Our paper are separated into seven chapters.

本文对一类具时滞和比率依赖的HollingⅢ型捕食-食饵系统进行了研究，利用Liapunov方法精确估计了正平衡点的吸引域，并利用Hassard方法研究了系统的Hopf分支，最后本文对一个具体模型进行了数值模拟。

The resolution of the two peaks is between 0.83 and 1.11. There is no particular interaction between xylooligosaccharides and Bio-Gel P-2, and the molecular weight is the dominant factor governing the separation in this system. The purity of xylobiose to xylohexaose separated by once time is 86.94%, 82.90%, 88.30%, 64.20% and 77.89 %, respectively. xylooligosaccharides, gel permeation chromatography, polyacrylamide gel, separation

本文以Bio-Gel P-2为层析介质，以FPLC为层析系统对酶解玉米芯制备的低聚木糖进行分离研究，为后期分离低聚木糖单一组分并将其用于生理活性的研究提供了理论依据。1材料与方法1·1试验材料木二糖标准品购于Sigma公司，低聚木糖由南京林业大学生物化工

Since most of the large molecules containing phosphorus element have double bonds, it is necessary to consider the special structures of double bonds in order to deal with these large systems more accurately. So, based on density functional theory and electronegativity equalization principle, applying a general atom-bond electronegativity equalization method , using separated program, through regression and least-squares optimization , the parameters of atoms and bonds in molecules are determined . By these parameters , the charge distributions and the energy of some molecules containing phosphorus element, especial the fragment of DNA, RNA, are calculated . The results are quite good.

由于这些含磷生物大分子体系都含有双键，为了明确的处理双键，进而更准确的解释带有双键和共轭双键的含磷生物大分子结构与性质的关系，我们以密度泛函理论~([1-4])和电负性均衡原理~([5-9])为基础，应用和开发原子-键电负性均衡方法中的σπ模型，利用最小二乘法，拟合确定了一些分子（含碳、氮、氧、氢以及磷等原子）的各种类型原子及化学键区域的参数，并利用上述参数计算了一些多聚核苷酸的电荷分布以及分子的总能量，进行了讨论，得到的结果可以和从头算相媲美。

A magnified image of the detection double slit is formed on a bi-cell detector,and the light intensities through the detection double slit are detected by the bi-cell detector.In this way,the position of the measured object can be obtained by detecting the light intensities on two separated parts of the bi-cell detector.

探测双缝放大成像在双像限探测器上，投影狭缝像透过探测双缝的光强分别被双像限探测器的两个像限所接收，通过检测双像限探测器两个像限上的光强获得被测物体的位置。

Each line in the envelope address is separated by one double space.

信封地址的每一行都用二倍的距离隔开。

Unlike downdraft and updraft gasifiers, the ash bin, fire and reduction zone in crossdraft gasifiers are separated.

与吸式气化炉和上升气流的垃圾桶，消防和减少crossdraft气化炉区是分开的。

The character of the doxology suggests that this book was separated from the following only to carry out the analogy with the Pentateuch.

性质的doxology表明，这本书是分开以下只进行类比与摩西五。

This paper analysed the kinematic properties of ball joint hi nged on the piston rod and steering drag link of a separated assistant steering m echanism, and the equations of the path and mathematical model of pressure angle were established.

文摘：分析了分置式转向助力机构的液压缸活塞杆与转向直拉杆相铰接的球头销的运动特性，建立了其轨迹方程及压力角的数学模型。

Far over the ice, between the hemlock woods and snow-clad hills, stands the pickerel-fisher, his lines set in some retired cove, like a Finlander, with his arms thrust into the pouches of his dreadnaught; with dull, snowy, fishy thoughts, himself a finless fish, separated a few inches from his race, dumb, erect, and made to be enveloped in clouds and snows, like the pines on shore.

一个渔夫站在冰面上，位于铁杉树林与覆盖了皑皑白雪的小山之间，像芬兰人一样，他将鱼线垂放在小河湾中，手插在大衣口袋里，一动不动，像有着鱼一样的思维，因此他自己就是一个无鳍的鱼，而他的同类在冰面下的不远处；他静谧地伫立着，被云和雪包裹着，就像岸边的松树。

About 18 ,000 Druse Arabs who consider themselves Syrian nationals also live on the Golan where large numbers of Israeli and Syrian troops are separated by a force of U.

戈兰高地还居住着大约1万8千名认为自己是叙利亚人的德鲁士族阿拉伯人。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新