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Phenotypic plasticity and genetic differentiation are the two major strategies that alien invasive plants can adapt habitat heterogeneity.The polymorphism of invasive plants and the diversity of their dispersal way enable them occupying invaded habitat quickly,and dispersing with a far range.The breeding strategies that agamogenesis and amphigenesis can coexist and trade off according to the habitat and invasive stage can not only promote the invasive population erupted massively,but also directly affect the dispersal mechanism and regulate the genetic structure of the population.

表型可塑性和遗传分化是外来入侵植物对生境异质性的两种适应策略;散布体多态型和散布途径多种化,使外来入侵植物迅速占领入侵生境,并进行远距离扩散;无性生殖和有性生殖并存,并根据生境和入侵阶段权衡的繁育对策不仅使入侵种群大面积暴发成为可能,而且直接影响散布机制并对种群遗传结构具有调节作用。

The decoction did not have the influence regarding to the wet weight of uterus.(2) Wet weight of ovary:Compared with the blank group,the ovary weight of other groups were significantly lighter(p<0.05).There is two reasons:First, because of decoction intervention ahead of time,it may had the prevention and the treatment dual function;Second,it possibly promoted the ovulation, and caused the liquid discharged from the pouch of the ovary,thus promoted ovary volume and weight decline.(3) Endocrine changes:①The content of androsterone in high dose groups were significantly lower than the low dose groups(p<0.05),Chinese herbal had certain dose-effect relationship.

上方对于子宫湿重无影响(P>0.05)。2、卵巢湿重:用药的各组与空白组比较,对于卵巢的重量均有影响(p<0.05),考虑有两个原因:第一,由于造模的同时用药,有预防与治疗的双重作用;第二,可能是促进排卵,使囊内卵泡液排出,从而促进卵巢体积及重量的下降。3、内分泌改变:①高剂量组别与低剂量组别比较,在降调总睾酮的作用更大,差异有统计学意义(p<0.05),说明中药治疗作用具有一定的量效关系。

Movement trajectories of electrons under complex field and state parameters when electrons return to the dielectric surface are obtained by simulation,such as impact energy and return time. Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron,and there is an emergence angle in which the electron has the maximum trajectory length and impact energy.

研究发现:电子出射角度对其运动状态有显著影响,电子存在运动轨迹最大的某一出射角度,该角度下电子拥有最大的撞击能量;微波电场幅值的增加将使电子撞击能量增加,返回时间减小,微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡,这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因;随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。

Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron, and there is an emergence angle in which the electron has the maximum trajectory length and impact energy, Impact energy will increase and return time will reduce as increasing the amplitude of electric field, and both parameter would oscillate with the phase of electric field, which can essentially explain that multipactoring electron number oscillates in twice the frequency with the increase of microwave frequency, electron trajectory will change from parabolic-like movement to complex oscillation.

研究发现:电子出射角度对其运动状态有显著影响,电子存在运动轨迹最大的某一出射角度,该角度下电子拥有最大的撞击能量;微波电场幅值的增加将使电子撞击能量增加,返回时间减小,微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡,这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因;随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。

In this paper, firstly we researched the relationships of the communicating distanceand the channel characteristic, the effect of the multiple scattering to the laserpropagation, the requirement of the laser communication to the ATP system and theway to determine the angular dispersion and receive field of view. It is proved that inlight haze weather, letting the input and output laser\'s wavelength are diferrent witheach other, after passing by the filter, it can avoid backward scattering effectually andfor the communication within 15km, the influence of the multiple scattering inatmosphere can be ignored.

论文对通信距离与信道特性、多次散射对光传输的影响、无线激光通信对ATP带宽的需求以及光束发散角和接收视场角等重要系统性能参数和指标进行了分析和研究,证明了在轻霾天气状态下,使系统中两终端发送的激光束波长各不相同,经过光束滤波,可以有效地消除后向散射干扰;在15km的通信距离范围内,大气中的多次散射对无线激光通信光传输的影响可以忽略。

With increasing ethanol content in mixed solvents,the dipolar attracting interactions between glycine molecules are maximumat 25% ethanol; the attracting interactions arising from hydroxyl groupsbetween L-serine molecules are also maximum at 25% ethanol; the repulsinginteractions involving apolar side-chains between L-valine molecules aremaximum at 15% ethanol.

当乙醇分子取代DMF时,使含羟基的极性侧链的吸引作用显著增强,使非极性部分的排斥作用的影响减弱。

ASCENDENT office chairs series have multiple configuration options, dealers may be based on market demand and user requirements with its own design, an appropriate adjustment of product configuration can be set up so that the same shape of the product without affecting its performance under the premise of the use of lower product prices, so that Products more market competitiveness, but also increase the allocation to meet the quality requirements for products with higher consumption levels, such as selection of multi-function devices institutions.

ASCENDENT办公椅系列产品具备多重配置选择,经销商可根据市场需求和用户要求自行搭配设计,适当调整产品组建的配置可以使同一外形的产品在不影响其使用性能的前提下降低产品的价格,使产品更具市场竞争力,同时也可增加配置以满足对产品品质要求较高的消费层面,如选用多功能的机构装置。

In an assimilative process, successive sound is made identical, or more similar, to one another in terms of place or manner of articulation, or of haplology- the loss of one of two phonetically similar syllables in sequence.

语音同化过程使一个音受其毗邻的音的影响而发生音变,使其发音变得与其毗邻的音相近。语音同化的结果可以导致元音或辅音的丢失,可以导致元音的鼻音化,也可以导致语音形态的变化。

Effect of rosuvastatin on coronary atheroma in stable coronary artery disease: multicenter coronary atherosclerosis study measuring effects of rosuvastatin using intravascular ultrasound in Japanese subjects.

罗苏伐他汀对稳定型冠心病冠状动脉粥样斑块的影响:多中心冠状动脉粥样硬化研究通过对日本国民使用血管内超声来测定罗苏伐他汀影响

The characteristics of pentacene/perylene derivatives based organic solar cells are investigated in this thesis Donor and acceptor layers are pentacene and N N'-dioctyl-3 4 9 10-perylenetetracarboxylic diimide (PTCDI-2~13C) respectively Twelve organic solar cells with pentacene/PTCDI-2~13C heterojunctions were fabricated to study the influence of various alkylic perylene derivatives on the power conversion efficiency Under the sunlight simulator with AM1 5G filter and 100 mW/cm2 the solar cell of pentacene/PTCDI-7C heterojunction with cathode of Ag/Al bilayer has the best performance among the devices with pentacene/PTCDI-2~13C heterojunctions In PL spectrum analyses the pentacene/PTCDI-7C film had lower recombination rate than the other pentacene/PTCDI-2~13C films; therefore more excitons could reach the P/N junction and enhance short-circuit current Furthermore the PTCDI-7C film grown on the surface of penatcene was more matched than other PTCDI films analyzed by the PL peak shifts of 10 nm and 45 nm thick PTCDI-2~13C and images of atomic force microscope More lattice match between the films of pentacene and PTCDI resulted in fewer defects in P/N junction and more carries can reach electrodes Accordingly the power conversion efficiency approach 2% was obtained from the solar cell with the active layer of pentacene/PTCDI-7C

本研究探讨以五环素/骈苯衍生物异质接面太阳能电池之特性,利用pentacene作为电子施体有机材料,PTCDI -2C~13C作为电子受体有机材料,制作出异质接面为pentacene/ PTCDI-2C ~13C等12种有机太阳能电池,比较不同碳数的骈苯衍生物对於有机太阳能电池之光电转换效率之影响。在AM1 5G、100 mW/cm2的模拟太阳光下,以pentacene/PTCDI-7C异质接面太阳能电池具有短路电流9 882 mA/cm2、开路电压0 376 V、填充因数0 523及光电转换效率达1 945%,皆比其他pentacene/PTCDI-2C ~13C异质接面太阳能电池来的大。由薄膜分析可知PTCDI-7C在这12种太阳能电池中具有较低的电子电洞复合发光效率,可以让较多激子到达异质接面进行电荷分离,减少电子电洞对复合发光的机率;此外,由光激发萤光光谱之峰值位移配合原子力显微镜表面结构图,可以得知当PTCDI-7C成长在pentacene上时会顺著pentacene的结构成长薄膜,故较无缺陷产生在P/N接面处;而在其他结构下则无此现象产生,致使在pentacene/PTCDI-7C薄膜中的载子有较大的机会可以移动至电极,使光电流提高,进而使光电转换效率提高。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力