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To combine immediate modeling with sketch modeling, increased the level of parameterization about structural design of belt pulley.

通过直接造型与草图造型相结合,提高了皮带轮结构设计的参数化程度;通过设置开关参数增加了皮带轮三维模型模板的适用类型,为轮盘类零件的参数化结构设计提供了有益的探索途径。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethyl malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effective base.

在这类催化反应中,碱的选择具有重要的影响:以K3PO4为碱, Pd2/L1催化体系在丙二酸二乙酯的α-芳基化中,富电子溴代芳烃显示较好的活性; Pd2/L1催化的乙酰乙酸乙酯α-芳基化时,以 K2CO3为碱,催化体系显示较好的活性,这个催化体系可控制反应得到α-芳基乙酰乙酸乙酯,而不是脱乙酰基的产物。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethy malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effectiv base.

在这类催化反应中,碱的选择具有重要的影响:以K3PO4为碱,Pd2/L1催化体系在丙二酸二乙酯的α-芳基化中,富电子溴代芳烃显示较好的活性;Pd2/L1催化的乙酰乙酸乙酯α-芳基化时,以K2CO3为碱,催化体系显示较好的活性,这个催化体系可控制反应得到α-芳基乙酰乙酸乙酯,而不是脱乙酰基的产物。

The nano-ionic liquid containing metal complex could be an effective catalyst for oxidative carbonylation of amines to carbamates and disubstituted ureas and for synthesis of unsymmetric ureas from amines and nitrobenzene, in which turn over frequencies exceeded 10000mol/mol/h.

以该系列纳米离子液体为催化剂高效的实现了胺类化合物催化氧化羰化制备氨基甲酸酯和二取代脲(转化频率>10000mol/mol/h)以及胺与硝基苯通过一氧化碳羰化制备不对称脲的过程。

Treatment of the diacetoxy-calix [4] arene with a series of ditosylates in dry MeCN in the presence of NaOH resulted in formation of electron-rich calix [4] areneocrowns, which reacted with 4, 4'-bipyrindinium and p-bis -benzene at room temperature in dry MeCN to afford self-assembling [2] catenanes by π-π stacking interaction.

以杯[4]芳烃为原料,通过三氟乙酸铊将其氧化成醌,醌类化合物在Zn粉、冰醋酸、少量盐酸和过量的乙酸酐中反应得到双乙酰化产物,利用氢氧化钠使其水解,然后再与各种对甲苯磺酸二酯进行环化反应,得到一系列具有富电子空腔的杯[4]芳烃并冠醚。

In practical communication systems, it is necessary to apply data equalizers to recover the original waveform from the distorted one.

在实际的通讯系统中需要以资料等化器来回复一个失真信号的原始波形,近来许多以类神经网路为基础的等化器设计被应用在严重失真的信号回复。

The results available now indicate that glass-like carbon synthesized from phenolic resin is a non-graphitizing carbon, and consists of both sp 2-hybridized carbon atoms that form imperfect graphite structure and sp 3-hybridized carbon atoms that are due to the presence of disordered carbon; and in the fullerene-related structure of glass-like carbon, there exist some pentagons and heptagons carbon rings.

玻璃炭作为一种特殊炭材料已广泛应用于许多领域,其制备、性质、应用以及基本结构的研究已经取得了很大的进展,已有的研究结果表明酚醛树脂基玻璃炭是一种典型的非石墨化炭材料,由 sp2杂化态碳原子和 sp3杂态碳原子组成,且在其类富勒烯结构中存在五元环和七元环。

The therapeutic problems posed by class D beta-lactamases, a family of serine enzymes that hydrolyse beta-lactam antibiotics following an acylation-deacylation mechanism, are increased by the very low level of sensitivity of these enzymes to beta-lactamase inhibitors.

丝氨酸酶一个科能水解β-内酰胺抗生素和随后进行酰化和脱酰化机理, D类β-内酰胺酶引起的治疗问题,随着这些对β-内酰胺酶抑制剂的酶的非常低敏感性而不断增加。

In this algorithm, first, the time series is segmented and symbolized with the linear segment representation and the vector shape clustering method,so that each symbol can represent aprimitive and independent pattenr.Thenthe minimal occurrence representaion of time series and the association rule discovery algorithm proposed by Agrawal is combined to extrac frequent patterns of various structures from non-synchonous multiple time series.

该算法首先利用线性化分段表示法和矢量形态聚类实现时间序列的特征分割与符号化转换,然后通过将Agrawal关联模式发现算法的核心思想与时间序列最短实现表示方法相结合,实现了非同步多时间序列中多种结构频繁模式的发掘。

She expresses her literary gist to reveal, criticizes and remoulds the shortcomings of human nature by literarily exploring the functional relationship between doctors and patients, and that of disease and therapy, which are the most basic ones in the complicated medical system.

毕淑敏以作家和医生的双重视角关注写作对象,从生理、心理、伦理、道德多层面全方位地透视人生;她锁定医学题材,以文学化的&医学&的内容及其叙事表现独树一帜;她以从容淡定的口吻冷静地阐释&生&与&死&的主题和宏大的人文关怀,并以日臻成熟的创作跨越了单一的社会学视角,上升到对生存价值的追问和生命意义的思考上,使作品获得了哲学意义和审美意义上的超越;她借医生与患者以及疾病与治疗这两类复杂的医学体系中最基本的功能关系的文学化的开掘,寄托和表达揭示人性弱点,批判和改造的文学主旨;她给医学裹上了文学的外衣,以医学的&冷&和文学的&热&来打造人物的性格,把沉重的医学话题和艰深、晦涩的医学术语以文学的笔法写得轻松、幽默、好看。

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推荐网络例句

What would he tell Judith and the children?

他将怎样告诉朱迪丝和孩子们呢?

I this is at that time, the opinion with peacockish true girl is full of in a heart.

这就是当时的我,一个心中布满虚荣的女孩子真实的想法。

Oh, and I bought myself a new laptop," he said."

哦,我还给我自己买了一个新笔记本"他说。"