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present-day相关的网络例句

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与 present-day 相关的网络例句 [注:此内容来源于网络,仅供参考]

The numerical ex-periment has shown that the number of iterations depends significantly on the positiveparameterα,β. But, in general, it is di?cult to choose a proper parameterα,β. Thuswe propose new self-adaptive alternating direction method which adjusts the scale pa-rameter automatically per iteration based on the message of the iterates. We have provedthe convergence of the method under mild assumptions.Finally, we present some numerical results.

对于我们提出的新交替方向法,数值实验表明,迭代的步数与时间与所取的参数α,β有关,然而我们很难去选择一个合适的参数α,β,因此我们提出新自适应交替方向法,对其中的参数α,β进行自适应调整,这种自适应算法根据每步迭代信息自动地调整参数α,β,并证明了算法的收敛性。

The Prologo for the Colombian edition is being written by a dear friend here, who is a "star" in the alternative medicine field. He has two clinics now and his patients are from the cabinet of the Present Presidential administration.

亚伦比亚译本的序言是我这里一个亲密的朋友所写的,他也是一个在"替代医学"领域极负盛名的专家,他目前有两个诊所,他的病人有的是本届总统府内阁成员。

In truth, however, our present altruistic attempts can only be within the framework of according to one's means and conditions.

"说实话,但是,我们目前的利他主义的企图只能是框架内的"根据自己的手段和条件。

At present, the research is focused more on the system of aluminate than silicate.

目前,研究主要集中在铝酸盐体系,对硅酸盐体系的研究较少。

In the present paper, based on the thorough analysis and research of the mathematical model for the flow field and temperature field, the filling and solidification process of aluminous hub was successfully simulated by using ANSYS software.

本文以大型有限元仿真软件ANSYS为工具,在对铸造过程流场、温度场的数学模型进行深入分析研究的基础上,成功的模拟了铝合金轮毂类铸件低压铸造的充型凝固过程,并根据模拟结果对铸件可能产生的缺陷及部位进行了预测,完成了利用ANSYS软件来检测、校核模具设计和工艺安排的工作。

The present invention is preparation process of nanometer aluminum hydroxide and belongs to the field of inorganic compound preparing technology.

本发明涉及一种纳米氢氧化铝的制备方法,属无机化合物制备工艺技术领域。

Simultaneously had pointed out flocculant subject matter which and present development direction faces in the aluminum oxide production industrial application.

同时指出了絮凝剂在氧化铝生产工业应用中面临的主要问题和今后发展方向。

My alumni and alumna are present at my birthday party.

我的男校友和女校友都出席了我的生日聚会。

ABSTRACT In the present paper experimental studies on thermodynamic behaviour of titanium and silicon oxides in a number of quaternary and pentanary molten slags have been made by means of H〓O/H〓 chemical equilibrium between copper melts and molten slags in alundum crucibles with the molybdenum plate as the liners.

本文采用H〓O/H〓定组成混合气体与钼衬坩埚中熔渣之间的化学平衡方法,实验研究了多个四元和五元熔渣中钛和硅氧化物的热力学行为。

The results are listed as following :㏕he best anti-erosion proportion of resin present is 25wt% in the condition of silicon carbide reinforced SMCC, while the alumina reinforced SMCC is 40wt%.(2) The better anti-erosion results was achieved with the ratio of silicone resin to acrylic resin containing hydroxy being 3: 1.㏕he composites coating tends to be more brittle when added in alundum particles. It also means that the maximum erosion peak of alundum reinforced SMCC tends to normal angle.甌he change of erosion rate of SMCC can be divided into two stages with the increment erodent velocity: the slow erosion stage of the beginning and the stable erosion stage.

首次发现:①SiC增强的复合涂料涂层,树脂含量为25wt%时,具有最佳耐冲蚀性能:Al_2O_3增强的复合涂料涂层,树脂含量为40wt%时,具有最佳耐冲蚀性能;②SiC增强的涂料,有机硅树脂与丙烯酸树脂的比例为3:1时的耐冲蚀性能好于1:1的复合涂料涂层;③Al_2O_3增强体使涂层变脆的倾向大于以SiC为增强体的涂层,即SiC增强的复合涂料涂层的最大冲蚀率出现在30°,Al_2O_3增强的复合涂料涂层的最大冲蚀率出现在75°~90°之间;④低速冲蚀磨损机理主要是弹性变形与疲劳;高速冲蚀磨损机理主要是显微切削和显微犁耕。

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