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This study will be mainly through potted lotus leaf fern Adiantum seedlings and wire division to transplant fern, and then through the different light intensity and moisture content of the orthogonal to quantitative research lotus leaf fern Adiantum optimum growing conditions, and through Transplant Research Laboratory test pilot of the two species, competition between species to find lotus leaf fern Adiantum way to protect endangered mechanism and provide a theoretical basis.
本研究主要通过盆栽将荷叶铁线蕨的幼苗与铁线蕨进行分株移植,再通过在不同光照强度和水分含量的正交实验来定量研究荷叶铁线蕨最适生长条件,并且通过实验室移栽试试验探究两物种之的种内,种间竞争关系为寻找荷叶铁线蕨濒危机理和保护途径提供理论依据。
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The sample of granular cellular fiber with size of 5-8 mm is produced by using this technology which can be depicted as follow, adhering the asphalt particutate, which can be depicted as follow: adhering the asphalt particulate, which is made of news paper and asphalt, on the surface of fiber by emulsion method, then mixing them by mechanical stirrer, dewatering and pelleting.
采用这一工艺,以新闻纸和优质路用沥青作为原料,通过胶乳法使沥青颗粒均匀粘附在木质纤维表面,再通过机械搅拌、脱水、造粒等工艺,制备出5~8mm的颗粒状路用木质纤维样品,通过室内高温稳定性试验,比较掺入进口颗粒状路用木质纤维和掺入自制颗粒状路用木质纤维的沥青混合料的抗高温永久变形能力。
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A new SVM is presented in this paper to solve the approximately linear separable problem of pattern recognition:First,we transform the two convex hulls which are made up of the approximately separable training set to make them separable;Second,we can figure out a separating hyperplane by halving the nearest points method or maximal margin method;Then,we get the approximately linear SVM by solving the dual problem of maximal margin method.
对模式分类中的近似线性可分问题提出了一种新的近似线性支持向量机:先对近似线性分类中的训练集所形成的两类凸壳进行了相似变形,使变形后的凸壳线性可分,再用平分最近点和最大间隔法求出理想的分划超平面,然后再通过求解最大间隔法的对偶问题得到基于相似压缩的近似线性SVM。
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Using the iron standard solution makes standard curve, and then through the standard addition method measures the absorbance of water samples, and finally through the calculation knows content of iron of water sample.
通过铁标准溶液作出标准曲线,再通过标准加入法来测出水样的吸光度,最后通过计算得出水样中铁的含量。
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Below thesis faces the present balelism in the field of recognising TV movie,starts with the discussing about definition,indicates the significance of TV movie"s existance in the course of looking back American TV movie"s development and acruality,emphasizes the effects China TV movie brought out from 1999,analyzes current tanglesome problems and the main reasons,finally brings forward constructive breakthrough methods strating off from medias self developing trend and features.
本文将直面当今社会对电视电影认识上的不清晰的现状,从讨论电视电影的定义入手,再通过对电视电影产生的过程和背景的回顾和总结,指出电视电影生存的意义,同时以美国电视电影的产生、发展、现状和特征为重要参考,重点研究中国电视电影从1999年出现至今所带来的各方面影响,分析问题重重的现状以及背后的深层原因,再从媒体本身的发展趋势和特点出发,建设性地提出适合中国电视电影寻找出路的突围方案。
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The qualitative analysis and numerical results show that a positive period-1 solution bifurcates from the semi-trivial periodic solution through a fold bifurcation, a positive period-2 so...
定性分析和数学模拟表明,半平凡周期解通过fold分岔分岔出正周期1解,正周期1解通过flip分岔分岔出正周期2解,再通过一系列flip分岔通向混沌。
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General clue of this paper is simulating wood stress field change in initial cutting stage and working out weighted boundary condition of cutting tools first,and then based on which, finding out shear stress and maximal effective stress when wood cut-ted.Meanwhile,finite element comparative analysis is proceeded on distortion and stress field by changing tool orthogonal rake.
本课题的总体思路是通过大型有限元软件ANSYS来模拟切削初始阶段中木材的应力场变化,进而得出刀具受力的边界条件,依此为基础求出木材受切时的剪应力及最大等效应力,同时通过变化刀具前角分别对受切工件的变形及应力场进行有限元比较分析,从而确定刀具的优化前角;优化前角确定后,再通过对刀具进行强度校核确定后角优化值。
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Water inside vacuum heat- collection tubes; since the hot medium inside vacuum tubes floats up and cold one goes down due to respective specific gravity, hot and cold mediums convections up and down to cause the heat conduction, furthermore transfer the heat to the related working medium in the heat tubes, the working medium sorbs the potential heat and becomes steam to rise up to the condensing section from the tube heat evaporating section; it emits the heat in condensing section to change again into liquid working medium; it flows back to evaporating section under the gravity action, the emitted heat is transferred into the water inside water tank or tube group by means of the heat-conduction through heat tubes condensing section; it makes the cold water in water tank into hot water in the repeated way.
阳光透过全玻璃真空集热管的外玻璃,照射到涂覆在内玻璃管外表面的选择性吸收涂层上,涂层将太阳的辐射能吸收并转化为热能,通过内玻璃管壁导热,传递给真空集热管内其液态传热介质,由于真空集热管内热的介质因比重小而上浮,冷的介质因比重大而下沉,冷热介质上下对流传热和导热,再通过热管的金属壁导热,将热量传递给热管内其相变工质,工质吸收汽化潜热而变成蒸汽,由热管蒸发段上升到冷凝段,在冷凝段放热冷凝,又变成液态工质,在重力作用下流回蒸发段,所放出的热量通过热管冷凝段金属管壁导热,传递给水箱或联集管内的冷水,周而复始,于是便将水箱内的冷水全部加热成热水。
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The humidity resistance and the sensitivity to chemical warfare agents simulants of the tuned films were also investigated.Self-assembled LBL polyaniline films were prepared from aniline monomers by in situ polymerization and the mechanism of film formation was discussed. It was proposed that the self-assembly of polyaniline occurred through the quick absorption of aniline monomer cations or aniline monomer cation radicals on the glass surfaces by electrostatic attractions to form homogeneous polymerization centers, then increased gradually by the way of upright to the glass supports for extensity, leading to the polyaniline chain growth. The polyaniline was doped under acidic condition to absorb anionic polyelectrolyte, such as sodium polystyrene sulfonate based on the electrostatic force, or to adsorb polymer based on hydrogen-bonding interactions, for example Polyvinyl Alcohol, and then recycled to fabricate_n or_n self-assembled multilayer films.
跟踪了原位聚合的具有纳米结构的聚苯胺多层自组装膜的成膜过程,提出了该自组装膜的成膜机理:聚合反应初始阶段的苯胺阳离子或苯胺阳离子自由基通过静电作用快速吸附到带负电荷的基片表面,形成均匀的聚合中心,然后以垂直于基片的方式进行链增长生成PANI;PANI在酸性条件下经现场掺杂后带正电荷,再通过静电作用吸附带负电荷的聚电解质如聚苯乙烯磺酸钠,或通过氢键作用吸附聚合物如聚乙烯醇,这样循环LBL-SA即得到_n或_n等原位聚合聚苯胺自组装膜。
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Keyboard function set through waveform type,frequency,amplitude,duty cycle,and other parameters of a signal to the microprocessor 89C51 control,MAX038 generated by the various signals,In this process,four-channel signal through D/A converters have simulated voltage and current,It transported up through the analog signal amplification,it enters the frequency MAX038 coarse-IIN,fine-tuning FADJ end,the duty cycle control-DADJ. In its COSC port received a three relays and oscillation frequency capacitance as a choice.
通过键盘设定函数波形种类、频率、幅度、占空比等参数的一个信号进入单片机89C51控制,由MAX038产生各种波形信号,在此过程中信号通过四通道D/A转换器产生模拟电压和电流,它再通过运放将模拟的信号放大,它进入MAX038的频率粗调端IIN、微调端FADJ、占空比控制端DADJ、在它的COSC端口接一个继电器和三个振荡电容作为频率选择。
- 推荐网络例句
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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。
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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。
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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