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Diffusion problem of a predator-prey model with Holling typeⅡfunctional capturing function is studied. Stability condition is obtained when diffusion is absent, and the effect on stability of positive equilibrium is studied when diffusion is present. In the end, the problem of existence of limit cycle is proved in the first quadrant when diffusion is absent.

针对一类具有HollingⅡ型功能捕获函数的捕食－食饵模型的扩散问题进行了研究，得到了无扩散时正平衡点的稳定条件，以及扩散存在时对正平衡点稳定性产生的影响，最后证明了无扩散时系统在第一象限存在极限环的问题。

The hours passed fitfully ,as I lay awake thinking and praying.

时间过得断断续续，那晚我时醒时睡，当我醒着时就思考和祈祷。

You can separate many on wing length when looking at them in the field. On Dark-sided Flycatcher the wings fall less than or equal to about half-way down the tail, they almost reach the tail-tip on Grey-streaked.

在野外观察时你可以靠翅膀的长度分辨，乌鶲的翅膀下垂时大概只到尾羽的一半或更短一点，而灰斑鶲的翅膀下垂时几乎到达尾羽的末端。

A Thermally switchable and flexible LCDs:A PDCLC sample is irradiated with a UV light through a photo-mask having the desired patterns, the CLC texture in the UV-cured region is changed from reflective planar texture to the scattered focal conic one. Additionally, the clearing temperature of the LCs in UV-cured regions is higher than that in uncured regions. Therefore, if the cell temperature is lower than Tuc-I (Tuc-I and Tc-I), the scattered patterns are displayed on the reflective background. Moreover, the addressed patterns are invisible when the cell temperature increases higher than Tc-I.

利用紫外光经过透射光罩写入图像，使聚合区域为散射之focal conic态，且该区域之相变温度较未照光区域高，故低於Tuc-I时，散射的focal conic图像显示於反射的planar结构背景上；而介於Tc-I及Tuc-I之间时，散射的focal conic图像显示於穿透的isotropic态背景上；若温度高於Tc-I时，图像与背景皆是isotropic态，亦即关闭显示图像。

In this dissertation, two methods were adopted to build dynamics model for vehicle ride comfort analysis: one is eight freedom vehicle ride comfort differential equation model in which lateral movement of driver and vehicle body was considered. Combined with time domain model of random road input, we got the driver and vehicles moving displacement.

本文采用两种方法建立了车辆平顺性分析的动力学模型：8自由度车辆平顺性分析的微分方程模型，考虑了驾驶员和车体的侧倾，结合随机路面激励的时域模型，在B级路面输入条件下，进行了时域仿真求解，得到车辆和驾驶员在汽车坐标系中各个方位上随时间历程的运动位移；利用ADAMS软件建立的福田小卡汽车，共计596个自由度的三维实体整车虚拟汽车模型，全面地考虑了影响平顺性的各种因素，然后通过对路面功率谱的变换生成适合于ADAMS／Tire的路面文件，实现了整车虚拟样机在随机输入激励下，车辆振动模型的时域仿真求解。

In this dissertation, two methods were adopted to build dynamics model for vehicle ride comfort analysis: one is eight freedom vehicle ride comfort differential equation model in which lateral movement of driver and vehicle body was considered. Combined with time domain model of random road input, we got the driver and vehicle's moving displacement. The other method, we built a Forland truck virtual prototyping using ADAMS, it is a 3D machine model, totally with 596 freedom degrees, every factor that influences the vehicle ride comfort was considered, finally complete the time domain simulation on random road input.

本文采用两种方法建立了车辆平顺性分析的动力学模型：8自由度车辆平顺性分析的微分方程模型，考虑了驾驶员和车体的侧倾，结合随机路面激励的时域模型，在B级路面输入条件下，进行了时域仿真求解，得到车辆和驾驶员在汽车坐标系中各个方位上随时间历程的运动位移；利用ADAMS软件建立的福田小卡汽车，共计596个自由度的三维实体整车虚拟汽车模型，全面地考虑了影响平顺性的各种因素，然后通过对路面功率谱的变换生成适合于ADAMS/Tire的路面文件，实现了整车虚拟样机在随机输入激励下，车辆振动模型的时域仿真求解。

Theoretical analysis proves that,when the pixel number,pixel size and reconstructed wavelength of the hologram are certain,computer simulated algorithms of Fresnel diffraction integral fall into convolution algorithm,angular spectrum algorithm and direct Fourier trans...

通过对相位函数局域空间频率的分析，给出了判定算法适用范围的特征再现距离，并分析得出，再现距离大于特征再现距离时，适合用卷积法；小于特征再现距离时，适合采用角谱法；等于特征再现距离时三种方法都适用。

When the graph Г′ is not connected, Our results are as following: if G is non-solvable then G is a Frobenius group; and if G is solvable then 2≤nl ≤4 for Fitting height nl of G.

我们给出了Γ′不连通时有限群G的结构：当G不可解时，G只能是Frobenius群；而当G可解时，也有2≤nl≤4。

Time however, and the Satisfaction I had, that I was in no Danger of being discover'd by these People, began to wear off my Uneasiness about them; and I began to live just in the same compos'd Manner as before; only with this Difference, that I used more Caution, and kept my Eyes more about me than I did before, least I should happen to be seen by any of them; and particularly, I was more cautious of firing my Gun, least any of them being on the Island, should happen to hear of it; and it was therefore a very good Providence to me, that I had furnish'd my self with a tame Breed of Goats, that I needed not hunt any more about the Woods, or shoot at them; and if I did catch any of them after this, it was by Traps, and Snares, as I had done before; so that for two Years after this, I believe I never fir'd my Gun once off, though I never went out without it; and which was more, as I had sav'd three Pistols out of the Ship, I always carry'd them out with me, or at least two of them, sticking them in my Goat-skin Belt; also I furbish'd up one of the great Cutlashes, that I had out of the Ship, and made me a Belt to put it on also; so that I was now a most formidable Fellow to look at, when I went abroad, if you add to the former Description of my self, the Particular of two Pistols, and a great broad Sword, hanging at my Side in a Belt, but without a Scabbard.

可是，尽管如此，时间一久，我对食人生番的担心逐渐消失了，更何况我确信自己没有被他们发现的危险。所以，我又像以前那样泰然自若地过平生活了。所不同的是，我比以前更小心了，比以前更留心观察，唯恐被上岛的野人看见。特别是，我使用枪时更小心谨慎，以免给上岛的野人听到枪声。天幸我早就驯养了一群山羊，现在就再也不必到树林里去打猎了。这就是说，我用不着开枪了。后来，我也捉过一两只野山羊，但用的都是老办法，即用捕机和陷阱捉到的。因此，此后两年中，我记得我没有开过一次枪，虽然每次出门时还总是带着的。此外，我曾从破船上弄到三把手枪，每次出门，我总至少带上两把，挂在腰间的羊皮皮带上。我又把从船上拿下来的一把大腰刀磨快，系了一条带子挂在腰间。这样，我出门时，样子实在令人可怕。除了前面我描述过的那些装束外，又添了两支手枪和一把没有刀鞘的腰刀，挂在腰间的一条皮带上。

You an also play with many different tenses (perfect, future perfect, pluperfect and so on).

你也可以运用多种不同的时态（完成时、将来完成时、地去完成时等等）。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。