化
- 与 化 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The methylated amidogen still held protonation at low pH. Therefore, the adsorption ability of biomass was almost unchangeable through methylation of amidogen in biomass. The acetylated amidogen lost protonation at low pH, and the capacity of dye adsorption of biomass decreased by 51.6% after acetylation of amidogen in biomass.
甲基化氨基在酸性条件下仍然可以质子化,故氨基甲基化修饰后染料吸附性能不变;乙酰化氨基在酸性体系中失去质子化能力,乙酰化修饰菌体染料吸附性能下降51.6%。
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The coordinate transformation and numerical integration was executed on the discretized tetrahedral elements based on which the 3-D MT vector-finite element method was implemented. A whole computation framework for 3-D vector-finite element method with unstructured mesh was given. Based on this some typical models were tested which has demonstrated that our algorithm could distinctively avoid problems caused by the fake solution and both the accuracy and efficiency were enhanced which made our algorithm has a bright future for further application.3. According to theory of Sobolev vector space and the discretization of Helmholtz space, the error estimate which was suitable for 3-D MT vector-finite element modeling was deduced by which the procedure of adaptive technique was guaranteed.4. Based on the fully unstructured tetrahedralization and optical strategy, the 3-D magnetotelluric h-adaptive vector-finite element method was presented through combining the error estimate. With this work, the accuracy and creditableness for 3-D MT complicatedly modeling was guaranteed.5. The 3-D magnetotelluric h-adaptive vector-finite element algorithm with unstructured mesh was implemented.
针对非结构化的四面体单元,采用坐标变换和数值积分方法,实现了MT三维矢量有限单元分析,建立起基于非结构化网格的三维MT矢量有限元计算流程,并对典型模型和国际标准电磁模型进行了数值模拟,结果对比和分析表明,基于非结构化网格的三维MT矢量有限元不仅消除了节点型有限元的伪解,而且具有很高的计算精度和速度,有广阔的应用前景。3、根据Sobolev函数的向量空间和Hemlholtz空间的分解,推导出基于残差的三维大地电磁矢量有限元后验误差估计公式,为三维大地电磁自适应矢量有限元数值模拟的实现奠定了基础。4、在完全非结构化四面体单元剖分及优化基础上,结合三维大地电磁矢量有限元后验误差估计公式,提出了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算策略,保证了对复杂大地电磁模型数值计算的精度和可靠性。5、实现了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算流程,对典型模型和国际标准电磁模型进行了数值模拟。
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The theory model and main technological parameters for semiconductor of ceramic material is studied, the semiconductor technology of oxygen defect through weak reduction is proposed, the BaTiO〓 semiconductor sample is prepared by means of doping and oxygen defect, the relation between the conductivity and color is inspected, a simple way to detect the semiconducting character of the sample is proposed.
探讨了陶瓷材料半导化理论模型及主要工艺参数,提出了弱还原氧缺陷半导化工艺模型,并分别用电价掺杂半导化和弱还原氧缺陷半导化两种工艺制备了BaTiO〓半导化样品,考察了样品颜色与电导的关系,提出了一种简易判断粉体样品半导化的方法。
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The talk will review four 'narratives' of deinstitutionalization: 1 the positive narrative of moving care from the asylum to the community, from 'confinement' to 'hope'; 2 the dark narratives of 'deinstitutionalization' leading to neglect and 'reinstitutionalization'; 3 a cultural narrative of distinctive forms of institutionalization and deinstitutionalization in diverse regions of Asia; and 4 a reminder of the complex history of deinstitutionalization in the United States and Western countries.
这个讲座将回顾对去机构化的四种"表述":1把服务从避难所转到社区的积极表述,从"拘禁所"到"希望";2)"去机构化"导致忽视和"重新机构化"的灰暗的表述;3)在不同的亚洲地区有各具特色的机构化和去机构化形式的文化表述;4)让人回想起在美国和西方国家中去机构化的复杂历史。
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The types of histone methyltransferases, the relationship between methylation of Lysine 9 of H3 and the formation of heterochromatin, gene regulation in euchromatin, and that with DNA methylation, were mainly introduced.
主要阐述了组蛋白甲基转移酶的类型,组蛋白H3中第9位赖氨酸甲基化与异染色质的形成、常染色体中基因表达的调控,以及与DNA甲基化之间的关系,说明了组蛋白甲基化与组蛋白乙酰化、磷酸化的相互关系,指出组蛋白甲基化对维持细胞各种状态的平衡起到极其重要的作用。
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Using the concept of Boolean functions and combinatorics theory comprehensively, we investigate the construction on annihilators of Boolean functions and the algebraic immunity of symmetric Boolean functions in cryptography:Firstly, we introduce two methods of constructing the annihilators of Boolean functions, Construction I makes annihilators based on the minor term expression of Boolean function, meanwhile we get a way to judge whether a Boolean function has low degree annihilators by feature matrix. In Construction II, we use the subfunctions to construct annihilators, we also apply Construction II to LILI-128 and Toyocrypt, and the attacking complexity is reduced greatly. We study the algebraic immunitiy of (5,1,3,12) rotation symmetric staturated best functions and a type of constructed functions, then we prove that a new class of functions are invariants of algebraic attacks, and this property is generalized in the end.Secondly, we present a construction on symmetric annihilators of symmetric Boolean functions.
本文主要利用布尔函数的相关概念并结合组合论的相关知识,对密码学中布尔函数的零化子构造问题以及对称布尔函数代数免疫性进行了研究,主要包括以下两方面的内容:首先,给出两种布尔函数零化子的构造方法,构造Ⅰ利用布尔函数的小项表示构造零化子,得到求布尔函数f代数次数≤d的零化子的算法,同时得到通过布尔函数的特征矩阵判断零化子的存在性:构造Ⅱ利用布尔函数退化后的子函数构造零化子,将此构造方法应用于LILI-128,Toyocrypt等流密码体制中,使得攻击的复杂度大大降低;通过研究(5,1,3,12)旋转对称饱和最优函数的代数免疫和一类构造函数的代数免疫,证明了一类函数为代数攻击不变量,并对此性质作了进一步推广。
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The result shows that: with the expansion of teacher education space, the reform and development of Chinese teacher education is much closer or equal to that of the international teacher education. The transitional stage and education reform in China puts forward a new demand for P. E. talents. The innovation as to education object, specification and curriculum arrangement raised in P. E. Curriculum Arrangement for Chinese Universities with four-year Program published in 2003 meets such a demand, and narrows the gap of education development in high P. E. academy between China and foreign countries. P. E. teachers abroad are usually cultivated by comprehensive universities, the cultivating objectives are verified, and generalists adapted to social development are emphasized. Cultivating mode abroad are various, with "open-type" or "non-directional type" as the main mode, and 4-year program, 5-year program, and 3-year program serve as the main form of education system. Curriculum arrangement abroad stresses general education, with foundationalization, normalization, objectification, optionalization, miniaturization, internationalization and syntheticalization as its characteristics and it employs credit system. The close-typed cultivating mode of P. E. academies in China should be gradually transformed into open-type or multi-type, cultivating generalists instead of specialists, and further constructing a new one with several cultivating types co-existing. Orientation of P.E. teachers in China should follow standard principle, coordination principle, experience principle and resource principle. To improve P.E teacher education in China, the following measures can be taken: relevant laws and regulations should be made for orientation; P.E teachers" training organization should be encouraged to participate in orientation; extension and connotation of P.E. teacher education should be expanded; resources should be optimize; systematic P.E. teachers" orientations should be organized;"Life P.E. Teacher Qualification "should be changed; useful-life should be set for P. E. teacher qualification; P.E. teacher qualification should be regularly authenticated; On-job training of P. E. teachers abroad tends to be systematic, but in China P.E. teachers" on-job training and prevocational training are separated; therefore measures must be taken to change this circumstance and thus speed up the systematic process. Factors concerning constructing a new system of P. E teachers are the following: reconstructing resources, making P.E. teachers" cultivation, orientation and training systematic, establishing a mechanism for encouragement and punishment, making school-based training and college training systematic, and setting up a mechanism combining directional training with non-directional training.
研究结果表明:随着教师教育革新空间的拓展,我国体育教师教育的改革与发展水平逐步与国际体育教师教育发展趋于接轨化。2003年颁布的《全国普通高校体育教育本科专业课程方案》在培养目标和规格、课程设置上的创新性,适应了我国社会转型和教育改革对体育教育专业人才的需求,进一步缩小了与国外高等体育院系教育发展的差距;国外体育教师一般由综合性大学或文理多科性大学培养,培养目标多向化,以培养适应社会发展的通才型人才为主;培养模式灵活多样,多数以"开放型"或"非定向型"培养模式为主,学制多以4年制、5年制、3年为主;课程设置上注重通识教育,突出基础化、师范化、针对化、选修化、小型化、国际化和综合化特点,实行完全学分制的教育管理制度;我国普通高校体育教育本科专业人才培养模式应该由封闭性转向开放式混合型的人才培养模式转变,由专才型转向复合型人才培养模式转变,构建多种类型并存的人才培养模式;我国体育教师入职教育革新应遵循的原则是本位原则、协同原则、经验原则和时间与资源原则,改进措施有:做好入职教育的法规化、制度化建设,激励体育师资培育机构参与体育教师的入职教育,拓展体育教师教育的外延和内涵,优化整合资源,系统组织体育教师的入职教育,改变体育教师资格"终身制",设定体育教师资格有效期限,推行教师资格定期认证制度等;国际上体育教师在职培训体系显现了体育教师教育一体化的发展取向,但我国体育教师的在职培训与职前培养存在分离性,必须采取改革措施,加速我国体育教师教育的一体化进程;构建体育教师教育新体系的实施要素是:重组资源配置,实现体育教师培养、入职和培训一体化,建立奖惩机制,实现校本与院校培训一体化,建立体育教师定向与非定向培养培训有机结合机制。
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In recent years, Feng Kang has advanced a more natural and direct redu-ction, i. e. the reduction via Green's formula and Green's function.
近年来冯康又提出一种更自然而直接的归化,即从Green公式及Green函数出发将微分方程边值问题化为边界上的含有广义函数意义下发散积分有限部分的奇异积分方程,这种归化在各种边界归化中占有特殊地位,被称为正则边界归化,本文将这一理论应用于重调和椭圆边值问题,研究了其正则归化的性质,并通过利用Green函数、Fourier分析及复变函数论方法等不同途径求出了在上半平面、单位圆内部、单位圆外部三种区域的Poisson积分公式及正则积分方程,其离散化可用于实际计算。
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The results show that WO_3 can be nitrided in the mixture gas of hydrogen and nitrogen, and ...
结果表明,WO3可以在氢氮混合气中被还原氮化;氮化反应分两段进行;在氢氮体积比(4~5)∶1,反应温度650℃的条件下,WO3可以被还原为产物W2N;在不同氢氮比的混合气中氮化,WO3会生成不同的中间产物WO2和WOXNY,中间产物WOXNY进一步氮化生成W2N要比WO2容易;助剂Ni的加入使氮化反应温度降低了100℃;载体γ-Al2O3的加入使金属氧化物的氮化过程变为一步氮化还原反应。
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Based on the analysis of the influence of the external economic environment to the development of freight, it proposed the content and objectives of development; modern information technology, through the analysis of technical characteristics of modern information technology, we research their use in the freight logistics in Inner Mongolia; By analyzing the external environment of freight logistics development, give the development way of freight logistics , and further determine the key technical ways of freight logistics development; Finally, on the basis of applications of modern information technology, research the use of modern information technology in the development of freight logistics and give some relevant policy recommendations.
本文在分析外部经济环境对货运发展影响的基础上,提出货运物流化发展的内涵、表现形式及目标;分析现代信息技术的技术特征,探讨现代信息技术在货运物流中的应用领域;采用SWOT分析法内蒙古货运物流化发展的外部环境,进而提出货运物流化发展的战略,明确内蒙古货运物流化发展的指导思想,提出内蒙古货运物流化的战略定位和主要途径;最后,根据现代信息技术的应用领域,探讨货运物流化发展途径中的主要技术,探讨现代信息技术在货运物流化发展关键技术的应用,并提出相关的政策建议。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。