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bond-free
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     The Application of Large-Span Bond-Free Prestressed Concrete Technology to Highrise Building Construction
     大跨度无粘接预应力技术在高层建筑工程中的应用
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  “bond-free”译为未确定词的双语例句
     The adoption of large-span bond-free prestressed concrete technology and tensioning device have ensured construction quality and saved construction cost of highrise building.
     在高层建筑施工中采用大跨度无粘结预应力技术,并对其中的铺放技术、穴模加工、张拉设备等进行改造,使工程质量得到保证,成本也有降低。
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  相似匹配句对
     On f-free Subsets
     关于f-free子集
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     Condemned to Be Free
     被判定的自由
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     The method is free from
     方法检出限为0.02μg/ml,对0.5μg/ml As的样品测定,其RSD(n=10)为1.5%。
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     Average-bond-energy and Fermi Level on Free Electronic Band
     自由电子能带中的平均键能与费米能级
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     Bond and Life
     债券人生
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  bond-free
For increasing speed, the data can be distinguished between substrate melting, dilution-free clad bonding, bond-free casting, and poor contact breaking the melt track into spheres.
      
These new operators provide a new characterization of maximal bond-free properties as well.
      
We develop new unary operators on languages for characterizing bond-free properties exactly, using familiar code-theoretic equations.
      
In this paper, we consider a bond-free property as defining a class of languages.
      
Bond-free properties generalize several bonding properties which have been studied in the context of DNA computing.
      
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The adoption of large-span bond-free prestressed concrete technology and tensioning device have ensured construction quality and saved construction cost of highrise building.

在高层建筑施工中采用大跨度无粘结预应力技术,并对其中的铺放技术、穴模加工、张拉设备等进行改造,使工程质量得到保证,成本也有降低。

A novel carbon carbon bond free radical initiator diisobutyl 2,3 dicyano 2,3 diphenyl succinate(DBCPS) was synthesized and characterized by elemental analysis, IR, FAB MS and \{\}\+1H NMR spectroscopy. The crystal structure of the compound DBCPS was determined by single crystal X ray diffraction techniques. The analytical results show that this crystal belongs to triclinic with space group \%P\%\-1, and the cell parameters are a =1 060 3(2) nm, b =1 470 2(3) nm, c =0 794 4 nm, α =93 40(3)°...

A novel carbon carbon bond free radical initiator diisobutyl 2,3 dicyano 2,3 diphenyl succinate(DBCPS) was synthesized and characterized by elemental analysis, IR, FAB MS and \{\}\+1H NMR spectroscopy. The crystal structure of the compound DBCPS was determined by single crystal X ray diffraction techniques. The analytical results show that this crystal belongs to triclinic with space group \%P\%\-1, and the cell parameters are a =1 060 3(2) nm, b =1 470 2(3) nm, c =0 794 4 nm, α =93 40(3)° , β =\{99 12(3)°\}, γ =103 90(3)°, V =1 180 8(4) nm 3, D c=1 216 Mg/m 3, Z =2, F (000)=452 The molecular structure of DBCPS exhibits as a central symmetry, anti conformation and mesomer and the severe steric hindrance in the molecule also exerts a distinct tension, abnormal bond angle and bond length. Its central C-C bond length is 0 159 2 nm, there is 0 048 nm elongated, and the elongation ratio 3 11%(the normal bond length is \{0 154 4 nm\}; and its corresponding ethyl derivative is 0 158 5 nm, the elongation ratio is 2 66%) There are two isomers, both \%meso\% and \%DL\%, can be found for dimethyl and diethyl derivatives respectively. However, because of the bigger steric hindrance, only one isomer, \%meso\% form which has a lower potential energy was obtained for DBCPS. The polymerization of methyl methacrylate(MMA) initiated by DBCPS showed the number average molecular weight of the polymer(PMMA) increased while both conversion and polymerization time were increased, and the molecular weight distribution decreased with the increasing of reaction time correspondingly. Hence, it is inferred that DBCPS can serves as a thermal iniferter and follows "living" free radical polymerization. The PMMA capped with the fragments initiated the polymerization of styrene to yield block copolymer PMMA b PSt.

合成了具有较大空间位阻的碳 -碳键型引发剂 2 ,3-二氰基 -2 ,3-二苯基丁二酸二异丁酯 ,测定了其分子结构 ,其中心碳 -碳键长达 0 .1 5 92 nm.对其引发甲基丙烯酸甲酯进行自由基聚合的研究结果表明 ,聚合物分子量随反应时间的延长而逐步增大 ,而聚合物分子量分布则逐渐变小 .聚合反应按照自由基“活性”聚合反应历程进行

In this paper,the relationship between structure and reactivity of aliphatic amino acids have been discussed via the stereo effect and electronic structure analysis of aliphatic amino acids,respectively.In the α-amino capric acid,(1) a potential energy plot for rotation about the α-C_1—C_2 bond free rotation energy capacity is 8.425 1 kcal/mol,and the α-C—N bond free rotation is 14.042 3kcal/mol.(2) The C-atom charge density is influenced by azyl and azyl replacine position n increasing,α-C、β-C、γ-C C atom charge...

In this paper,the relationship between structure and reactivity of aliphatic amino acids have been discussed via the stereo effect and electronic structure analysis of aliphatic amino acids,respectively.In the α-amino capric acid,(1) a potential energy plot for rotation about the α-C_1—C_2 bond free rotation energy capacity is 8.425 1 kcal/mol,and the α-C—N bond free rotation is 14.042 3kcal/mol.(2) The C-atom charge density is influenced by azyl and azyl replacine position n increasing,α-C、β-C、γ-C C atom charge density weakening.(3) With the relationship between azyl and a chain n of amino acids is linear,the system energy E=-594.804-0.005ln(n)(2≤n≤10).Some results obtained may be useful as references for teaching.

引导和构建结构决定性质的教学思想,理解结构与化学反应性能的关系.通过氨基取代直链型脂肪族羧酸化合物的空间构象和电子结构分析,在α-氨基癸酸中,(1)-αC-C键自由旋转能垒8.425 1kcal/mol,-αC-N键自由旋转能垒14.042 3kcal/mol,高能构象时分子极性较大,为化学反应活性构象;(2)碳原子电荷密度受到氨基的影响,随着氨基取代位置n增加,-αC、-βC、-γC等碳原子负电荷密度减少;(3)氨基酸的体系能E随氨基与羧基有位置n的关系具有E=-594.804-0.005ln(n)(2≤n≤10),给予阐述.

 
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