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Objective To study distribution and aged-related change of neuropeptide Y and nitric oxide synthase-positive neurons in occipital cortex of rats.

目的研究大鼠皮质枕叶神经肽Y和一氧化氮合酶(NOS1)阳性神经元的分布及其衰老变化。

Olfactory responses of Plutella xytostetta to polyamines were measured using a Y-tube olfactometer in the laboratory.

在实验室条件下利用Y型嗅觉仪测试了小菜蛾Plutella xylostella成虫对多胺的嗅觉反应。

This paper determined the olfactory respones of Tetranychus viennensis to different plants odors with "Y" olfactometer and petri-dish, volatiles from leaves of different plants were absorbed with SPME and analyzed with GC-MS (gas chromatograph-mass spectrometer). At the same time, the effects of different host plants on the development of Tetranychus viennensis were determined by means of the leaf-dish rearing method , in addition, the contents of some chemicals in the leaves of different plants were also determined.

本文用"Y"形嗅觉仪法和培养皿法测试了山楂叶螨Tetranychus viennenis Zacher对不同植物气味物质的嗅觉反应，并利用固相微萃取SPME吸附、用气相色谱—质谱联用仪GC-MS(gas chromatograph-mass spectrometer)分析了不同植物叶片的挥发性物质成分：同时采用海绵水盘法饲养山楂叶螨，研究了不同植物对山楂叶螨生长发育的影响，并测定了不同植物叶片中一些生化物质的相对含量。

The "Y" type olfactometer test showed that sex pheromones in female solvent extract and female volatiles were both attractive to the males, indicating the presence of sex pheromone in female collections. There was no significant difference in attractive effect between two methods of collection.

Y型嗅觉仪测定表明，雌蚊溶剂浸提和空气收集法获得的提取物对雄蚊有引诱作用，且二者引诱效果无显著性差异(P=0.655)，雄蚊对雄蚊提取物无选择性，说明2种方法均从菊花瘿蚊雌蚊提取到了性信息素。

Choice responses of Dacus dorsalis adults at different time(5,10,15,20,30,40,50,60 min) to the volatiles from banana pulp at different doses0.01,(0.1, 1.0,10 g were conducted by using Y-Tube olfactometer in laboratory,respectively.

利用Y-型嗅觉仪测试了桔小实蝇不同生理状态下两性成虫在不同时间内对不同剂量香蕉果肉挥发物的行为反应。

There was significant difference among monoterpene volatiles released from healthy, weevil damaged trunks of Pissodes punctatus and their branches. Walking P. punctatus in maturation feeding and sexually matured stages displayed different olfactory responses toward monoterpenes in a Y-tube olfactometer.

通过GC-MS分析，发现健康的与遭受华山松木蠹象Pissodes punctatus Langor et Zhang危害的华山松Pinus armandii Franch树干以及华山松枝梢释放的挥发性单萜烯在含量上存在较大差别；利用Y-型双向选择嗅觉仪进行的室内趋向反应实验发现，处于补充营养期和交尾产卵期的华山松木蠹象对单萜烯表现出不同的趋向反应。

The responses of mature and immature adults of Bactrocera correcta to methyl eugenol solutions at different concentrations (1%, 3%, 5%, 7%, 9%, w/w), to the mixture of ME and a sweet bait VA (12.5% vinegar, 25% alcohol and 62.5% H2O), and to the combination of the volatiles of ME solutions at different concentrations and a sweet bait SVA (2.5% sugar, 12.5% vinegar, 25% alcohol and 60% H2O) odor, were tested in Y-tube olfactometer in laboratory.

利用 Y-嗅觉仪测试不同生理状态番石榴实蝇 Bactrocera correcta两性成虫对系列质量分数(1%， 3%， 5%， 7%， 9% w/w)甲基丁香酚溶液、系列质量分数ME溶液与醋酒溶液醋∶酒∶水＝12.5%∶25%∶62.5%(w/w， VA混合液、系列质量分数 ME挥发物与糖醋酒溶液糖∶醋∶酒∶水＝2.5%∶12.5%∶25%：60%(w/w， SVA气味混合物的反应。

Function relation is the relation referring to one kind of one to one correspondence between two object , is to think that another variable y can take the value that one ascertains according to the function ascertaining that when a variable x takes certain value.

函数关系是指两事物之间的一种一一对应的关系，即当一个变量x取一定值时，另一个变量y可以根据确定的函数取一确定的值。

In order to locate direct singular positions, we begin by expressing the determinant of the Jacobian matrix Jx in terms of position of the center P of the moving platform. The Z and the Y coordinates of P may be chosen from the workspace, then the determinant of Jx is now a six order polynomial of X, the x coordinate of P. The direct singular positions corresponding to are obtained by solving the polynomial equation, and retaining all real roots in the workspace.

由速度分析的Jacobian矩阵Jx，将其行列式值表示成活动平台中心点P位置的函数，寻找奇异位置的方法是先假设平台高度，再假设工作空间内P点的Y座标，使Jx行列式成为P点X座标的六次方程式，求解方程式并保留在工作空间内之实根。

A new scheme for laser beam focus position error compensation is proposed, In this scheme, a decomposing compensation scheme, the compensation action along laser beam is decomposed to three orthogonal straight-line coordinates: X、Y、Z, without extra actuator.

论文提出了一种新的激光焦点位置误差补偿方案，该方案不需要专门的执行机构，而是将激光聚焦头沿着光轴方向的补偿运动分解到机床的X、Y、Z三个直线运动座标上，称为分解补偿方案。

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。