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Fourier analysis consists of Fourier series which can solve limited one-dimensional space Heat-conduction question and Fourier integral which can solve infinite one-dimensional space Heat-conduction question. This is more systematic compared with the other methods, and embodies corresponding beauty of Mathematics to Physics.

傅里叶分析包括傅里叶级数和傅里叶积分,用傅里叶级数法解决有界细杆的热传导问题,用含参数的傅里叶变换法解决无界细杆的热传导问题,比其它方法更系统,体现出一种数学与物理对应的美感。

Bioassay results revealed: compared with alcohol control, extracts at parameter 1, 4, 7 stimulated the absolute germination rate and potential, radicle growth, plumular axis growth, fresh weight, dry weight at different levels; extracts at parameter 2, 3 stimulated the all germination index except radicle growth and axis growth; extracts at parameter 6 stimulated all but radicle growth and fresh weight; extract at parameter 8 stimulated only the germination potential.

生物检测结果显示,与酒精对照相比:萃取参数1、4和7等条件苦楝叶提取物对杉木种子绝对发芽率、绝对发芽势、胚根长、胚轴长、鲜重和干重等发芽指标均表现出不同程度的促进作用,萃取参数2和3等条件苦楝叶提取对除胚根和胚轴外的各发芽指标起促进作用,萃取参数5条件苦楝叶提取物对除鲜重和干重外的各发芽指标起促进作用,萃取参数6条件苦楝叶提取物对除胚根和鲜重外的各发芽指标起促进作用,而萃取参数8条件苦楝叶提取物仅对绝对发芽势起促进作用。

RESULTS: Compared with patients in the non-AD group, those in the AD group showed decreased cerebral glucose metabolism mainly in the temporal and frontal lobes and the limbic system in the right cerebral hemisphere and the inferior frontal gyrus and precentral gyrus in the left cerebral hemisphere, and increased cerebral glucose metabolism mainly in the temporal and occipital lobes in the right cerebral hemisphere and the parietal and occipital lobes and limbic system in the left cerebral hemisphere.

结果: 抑郁焦虑组与非抑郁焦虑组比较,脑葡萄糖代谢下降的脑区集中于右侧大脑半球,主要位于颞叶、额叶及边缘系统,左侧大脑半球较少,主要位于额下回和中央前回;脑葡萄糖代谢升高的脑区集中于右侧大脑半球的颞叶、枕叶和左侧大脑半球的顶叶,枕叶及边缘系统。

The flowfield and performance of a centrifugal compressor was predicted and analysed, which was composed of a Krain's impeller and two types of vaneless diffuser specially: one was constant area vaneless diffuser and the other was the straight-wall. The results show that the efficiency of the straight-wall vaneless diffuser is obviously lower than that of the constant area, and a separate flow occurs nearby the exit of the centrifugal impeller with the straight-wall diffuser. However, the type of vaneless diffuser has little influence on the aerodynamics performance of the centrifugal impeller. Finally, it is suggested that the constant-area vaneless diffuser should be selected as the downstream extended area of the centrifugal impeller during the prediction for the centrifugal impeller.

对Krain叶轮后带等面积与直壁两种形式的无叶扩压器离心压缩机内部流场进行了计算与分析,结果表明:直壁型无叶扩压器离心压缩机的效率低于等面积无叶扩压器离心压缩机的效率;直壁型无叶扩压器使得叶轮出口的流动出现分离;扩压器的形式对离心叶轮的整体气动性能影响并不大;在进行离心叶轮数值研究时,叶轮后的延伸区最好采用等面积无叶扩压器,以尽量减小无叶扩压器所引起的计算误差。

As compared with the traditional irrigation-traditional fertilization, the following results of the improved optimized irrigation-optimized fertilization were obtained: significantly higher nitrogen use efficiency; the like tiller number per unit area, percentage of the tiller ear number/the tiller number, the ear number per unit area, the greatly reduced grain number per ear, and significantly heavier weight of 1, 000 grains; a trifle taller plants; shorter base internode length, a bit more weight per unit internode length, longer internode length under ear; almost the same LAI values in middle and later stages; coincident process of dry matter accumulation from straight growth onwards, a little more dry matter accumulation amount from earing to maturity; a little longer flag leaf, 2〓 leaf, 3〓 leaf (but the three leaves were shorter than those of the optimized irrigation-traditional fertilization) and shorter 4〓 leaf from top, a bit reduced total area of these leaves; almost the same leaf thickness, mean canopy leaf tilt angle, light extinction coefficient , ratio of light penetration in the upper, middle and lower parts of the wheat canopy, and fair plant type; almost the same senescence process of flag leaf; and increased root amount in 0-120cm soil layer and smaller rate of progressive decrease of the root length density and root weight density with soil getting deep, which can strengthen the resistance to adverse conditions such as water stress in the later stage.

在优化水肥条件下,冬小麦总分蘖数、成穗率及单位面积穗数与传统水肥比较接近,但穗粒数显著减少,千粒重显著提高;株高稍有增加;基部节间长度缩短,充实度略微增高,穗下节间增长;中后期LAI与传统水肥的LAI值基本吻合;起身至成熟干物质积累量动态变化过程与传统水肥十分接近,但抽穗至成熟所形成的干物质量增加;上三叶变长(但上三叶长度增加幅度小于优化灌溉-传统施肥处理),倒4叶变短,总叶面积略有减少;叶片厚度、冠层平均叶倾角、消光系数、冠层各层的透光率与传统水肥差异很小,株型较好;旗叶叶绿素含量动态变化与传统水肥十分接近;0-120cm土层的总根量明显增加,上层根群和深层根群的差异最小,有利于提高小麦后期的抗逆力。

The most significant variance lay in the 1000-seed-weight,followed by flag leaf length and inflorescence shape and then by distance between flag leaf and inflorescence with least in inflorescence length,plant form,leaf width and seed length.Meanwhile,morphological characteristics of D.glomerata have significant relationships: those with upright and constrictive inflorescences hav...

其中,种子千粒重变异最大;旗叶长度、花序形状次之;穗叶距、花药宽度、旗叶宽度等性状变异中等;而花序长度、株型、叶宽、种子长度变异最小。2鸭茅植物形态学特征间存在明显相关性,花序直立、紧缩的鸭茅,叶片窄长,茎秆粗壮,旗叶较长,雄性生殖器官发育良好,结种性能强;而花序下垂、开展的鸭茅则与之相反。3聚类分析表明,不同野生鸭茅种源可划分为3类,其中花序下垂种源聚于一类;而花序直立的种源分居另两类。4从形态学特征及相关农艺性状分析,花序直立的鸭茅更具开发利用潜力。

Pigments potent and air temperature are are more important than other factors. The color changing of foliage trees leaf resulted from these comprehensive factors, We must fully respect them in landscape design. Meanwhile, we should make of the bionomics and ecologic habitus of these trees, and make sure to let them show vivid colors and the most beautiful landscape effictiveness in urban environment, ensure the landscape designs more scientific and artistic.

观叶树种的叶色是在许多因素综合作用下发生变化的,在利用观叶树种进行园林景观设计时必须充分考虑影响观叶树种叶色的各种因素,同时对观叶树种的生物学特性和生态习性有深入的了解,使其在城市环境中达到最鲜艳的颜色,产生最佳的景观效果,使园林植物造景更具科学性和艺术性。

This research take late-maturing variety adzuki bean Jihong-4 as the experiment material, After the photoperiod inducement at different leaf ages treatment, the result showed that the activity of NR under LF treatment is higher than CK treatment on the whole, and is lower than SD treatment; The content of the dissociation amino acid under these three treatments show a descend trend along with the leaf ages accretion, but the inducement increasing the content of dissociation amino acid, different leaf ages leaves show some difference, and alternating rise with SD treatment; Inducement can reduce the content of soluble sugar, and continuous inducement shows a accumulation effect; 2LF is the most sensitivity stage for soluble protein under photoperiodic inducement, From this stage, each leaf indumenta can reducing the content soluble protein, but continuous inducement reducing rising it.

本研究通过光周期诱导的方法,对中晚熟品种冀红4号红小豆进行不同叶龄进行处理,结果表明:所有叶龄处理下硝酸还原酶活性基本高于自然光处理而低于连续短日照处理下的;随着叶龄增大,各处理游离氨基酸总量均呈下降趋势,但光周期诱导可提高游离氨基酸含量,不同叶龄表现有所差异,与连续诱导交替上升;诱导可降低可溶性糖的含量,并连续诱导出现累积效应;2LF是光周期诱对可溶性蛋变化最敏感的时期,这个时期起单个叶龄诱导可降低可溶性蛋白含量,但连续诱导却可提高;LF处理下的类胡萝素总体含量高于另两个处理,而LF处理下的叶绿素含量在仅3叶龄前高于CK处理下的,随后出现下降趋势。

The results show a reversed-flow region is formed at the tip of the pressure side due to the influence of the outside hot combustion gas and the pressure side tip thickness. The pressure gradient makes the coolant flow exit from the trailing edge slot first separates from the trailing edge cut-back, and then affected by the expansion wave, the coolant gas reattaches the cut-back of the trailing edge after passing a certain distance.

研究表明,由于外流和叶片叶盆尾缘厚度的影响,叶盆尾缘端部形成局部回流,叶片尾缘劈缝气体流出后受压力梯度的影响先抬起与叶背面分离,在流过一段距离后由于跨音速流膨胀波的作用,冷气流再次附着在叶背尾缘上。

The submodel quantitatively characterized the impact of genotypic differences on sowing date and sowing rate by tillering ability and percentage of final spikes to effective tillers, and the suitable pre-winter leaf number on main stem in relation to yield target is quantified according to the principle of determining spike number from yield level and leaf number from spike number.

其中,播前方案设计的知识模型包括产量目标,品种选择,播期确定,基本苗及播种量的计算,氮、磷、钾肥料运筹和水分管理;动态调控指标的知识模型包括适宜生育期,穗分化进程,群体茎蘖动态、叶龄动态、叶面积指数动态和干物质积累动态等生长指标动态以及有效叶面积率、高效叶面积率和粒叶比等源库指标。

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