顶用

The dual scale automaton model is improved by introducing the rule of synchronization development, mechanism of reiteration and delay law of plant growth from the viewpoints of botany,which make it possible to generate almost all types of the inflorescences defined by botanists, and to simulate acropetal and basipetal flowering sequences.

通过在双尺度自动机模型中引入&同步生长机制&和&重复生长机制&，能够模拟所有植物学中给出的花序类型。并通过应用&生长延时机制&，实现了&向顶开花&和&向基开花&两种开花顺序的模拟，避免了L系统用成花信号控制的缺点。最后通过与L系统的比较，证明该方法简单实用

By means of the Fourier series expansion, an approximate analytical propagation equation of flattened Gaussian beams passing through an apertured paraxial ABCD optical system is derived, and illustrated with numerical examples, when the transmissivity of the aperture is T = cos.

用傅立叶级数展开法研究了平顶高斯光束通过有光阑限制的近轴ABCD光学系统的传输特性，导出了光阑透射率为T=cos时的近似解析传输公式，硬边光阑的情况可作为Ω=0的特例得到。

By means of the Fourier series expansion,an app roximate analytical propagation equation of flattened Gaussian beams passi ng through an apertured paraxial ABCD optical system is derived,and illustr ated with numerical examples,when the transmissivity of the aperture is T=cos.

用傅里叶级数展开法研究了平顶高斯光束通过有光阑限制的近轴ABCD光学系统的传输特性，导出了光阑透射率为T =cos时的近似解析传输公式，硬边光阑的情况可作为Ω=0的特例得到。

However, the area is less studied than other areas of endophyteresearch world wide. Therefore, a series of experiments were carried out in laboratory,glasshouse and field to compare the responses of endophyte infected plants andendophyte free plants of perennial ryegrass varieties to 10 fungal pathogensisolated from turf type ryegrass in Lanzhou. The pathogens used in the experimentswere Alternaria alternata、Bipolaris sorokiniana、Fusarium avenaceum、Curvularialunata、Ascochyta leptospora、Fusarium acuminatum、Fusarium chlamydosporum、Fusarium oxysporum、Fusarium solani and Gliocladium roseum. In addition, someprotective enzymes activity and alkaloids contents of E+ and E- plants were measuredand LpsA gene of the common strain - Lp19 and mutant strain -AR1 of Neotyphodiumlolii were sequenced to identify their ...

本研究在初步明确兰州市坪用黑麦草内生真菌及其病原真菌多样性的基础上，在实验室、温室和田间开展了系列研究，比较了带内生真菌和不带内生真菌的黑麦草在离体和整株条件下对细交链孢、离蠕孢、燕麦镰孢、新月弯孢、小孢壳二孢、锐顶镰孢、厚垣镰孢、尖镰孢、腐皮镰孢和粉红粘帚霉等10种病原真菌的抗病性，测定了E+和E-植株数种保护酶活性及其生物碱含量的变化。

Aromatic constituents of 3 mature starfruit (Averrhoa carambola L.) cultivars, B17, B10 and Singapore Red, were analyzed using HS-SPME-GC-MS method.

采用顶空固相微萃取取法，用气相色谱－质谱联用技术分析了3个杨桃品种成熟果实的香气成分。

Methods: Optics and electron microscope were used to observe the microstructure and ultrastructure of human apocrine sweat glands in axillae from 20 osmidrosis patients, and then discuss the relations between different gender, age, seasons arid odor intensity.

用光学显微镜、透射电子显微镜观察20例腋臭患者腋窝顶泌汗腺显微、超微结构，并分析性别、年龄、季节等发病因素与气味强度之间的关系。

The square black muzzle of Buller pushed the door fully open.

只见布勒用它那宽宽的黑嘴把门顶开。

The head volatile of fresh flower of Chimonanthus praecox Link .

用顶空和不同吸附剂吸附法收集蜡梅花的头香，并用GC-MS法对其进行了化学成分研究。

The term is sometimes applied to cymose inflorescences, in which growth ceases with the production of a terminal flower bud.

这个词可以用在聚伞花序中，在聚伞花序中花轴顶端由于顶花先开放，而限制了花轴的继续生长。

On the test machine of glue,using three groups of 45 steel-40Cr disc test examples with clifferent hardness, the gear abrasion simulant experiment has been done about addendum, dedendum dividing point of single and double engagemenf area.

用三组不同硬度的45钢-40Cr的圆盘试件，在圆盘滚子实验机上，对渐开线齿轮的齿顶、齿根、单双齿啮合分界点四点进行齿轮磨损的模拟实验。分析了材料副的硬度和配对试件的绝对滑差速度对磨损的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐