查询词典 synthesis method

Four main types of spatial binary links are investigated in details for kinematic synthesis both in precision-position synthesis and multi-position synthesis. In terms of the invariants of spherical curve and cylindrical curve, the mathematical models of adaptive fitting sphere and cylinder are constructed by means of the saddle-point programming.

再次，根据常见空间机构运动副组合的约束曲线与约束曲面的曲率理论，阐述了空间机构运动综合的基本要素及其不变量拟合理论与方法，研究了有限位置和多位置情况下，自适应综合方法在空间S-S、C-S、C-C和S-C四类二副杆组运动综合中的应用，实现了自适应综合方法从平面到空间的扩展。

Now HLS has absorbed much research attention in IC-CAD field. In HLS, algorithms represented by algorithm description language are transformed into hardware structure description consisted of resisters and transfers. In the transforming process, synthesis of datapath is a core. The other works is based on it. And in the synthesis of datapath, operation scheduling, functional unit allocation and binding all are NP-Completeness problems. The structure of their solution space is not known well. If we must find a global optimum solution, we can only use exhaustion. This way needs too much computation for VLSI synthesis, and is impractical in Industry. So usually heuristic algorithms are used to search suboptimum solution.

因此HLS成为国际IC-CAD学界的一个热门，它把算法描述语言表达的算法转换为用寄存器、传输器描述的硬件结构，其中以数据通路的综合为主体，其余工作皆以此为基础；而在数据通路综合中，操作调度、功能单元分配、连线等均属NP问题，目前该问题的解空间尚未充分了解，如要求得最优解，只有采取穷举搜索法，对于大规模集成电路而言运算量太大，工业中无法承受，故通常都采用启发算法求次优解。

The thesis concerning about the total synthesis of some natural occurringlignans and neolignans consists of following five parts:I. Progress in the synthesis of some natural occurring neolignans A view of the synthesis of some natural occurring neolignans, especiallybenzofuraniod and bicyclo[3, 2, 1]octanoid neolignans was given. The syntheticmethods for this two kind of neolignans have been classified and discussed.Ⅱ.

本论文研究了一些木脂素和新木脂素类天然产物的全合成，共包括五部分内容：一、一些新木脂素类天然产物的合成进展对一些新木脂素类天然产物尤其是苯骈呋喃类和双环[3，2，1]辛烷类新木脂素的合成工作进行了较为全面的介绍，并对此类化合物的合成方法进行了分类和讨论。

objective effects of plant tannins,chebulinic acid and tellimagrandin i on chemically induced hemoglobin synthesis in k562 cells were investigated.methods the hemoglobin synthesis situation was assayed with benzidine staining.erythroid antigens glycophorin a expression on the surface of k562 cells was labeled by direct immunofluorescence using fluorescein isothiocyanate-conjugated anti-gpa antibodies.then flow cytometric analysis was performed to detect gpa expression levels on surface of the cells.results both chebulinic acid and tellimagrandin i could inhibit the hemoglobin synthesis of butyric acid and hemin-treated k562 cells in a concentration-dependant manner.however,the ba-induced k562 cells were more sensitive to two tannins than heroin-induced cells.conclusion chebulinic acid and tellimagrandin i have inhibitory effect on the erythroid differentiation.

目的 研究可水解单宁诃子酸和特里马素i对氯化高铁血红素和丁酸钠诱导k562细胞红系分化的影响。方法四甲基偶氮噻唑蓝法分析诃子酸和特里马素i对k562细胞生长的影响，联苯胺染色法检测血红蛋白合成情况，应用免疫荧光和流式细胞术检测血型糖蛋白a在细胞表面的表达。结果诃子酸和特里马素i在0.04～0.09？mmol／l浓度下均可显著抑制k562细胞的生长增殖。2种单宁化合物(0.002～0.01？mmol／l)可显著抑制丁酸钠诱导的k562细胞血红蛋白合成，2种单宁化合物(0.01～0.05？mmol／l)还可显著抑制氯化高铁血红素诱导的血红蛋白合成，特里马素i(0.01？mmol／l)还抑制丁酸钠诱导的gpa在细胞表面表达。结论诃子酸和特里马素i对红系分化有抑制作用。

The formation of charge transfer complex was studied in the first part. The second part includes the synthesis and characterization of the acrylated unsaturated polyester and the kinetic studies on the Ar-UPE/ triethylene divinyl ether (DVE-3) photocuring system, the rheology and properties of film after photocuring. The third part includes the synthesis and characterization of the urethane modified unsaturated polyester and the kinetic studies on the PU-UPE/DVE-3 photocuring system, the rheology and properties of film after photocuring. The fourth part includes the synthesis and characterization of the vinyl ether end capped polyurethane and the kinetic studies on the VE-PU/DVE3 photocuring system, the rheology and properties of film after photocuring.

整个研究工作分为四个部分：一是电荷转移复合物的研究；二是丙烯酰氧基化不饱和聚酯的合成，表征，Ar-UPE/二缩乙二醇二乙烯基醚（DVE-3）体系光固化动力学研究以及Ar-UPE/DVE-3体系流变性能和光固化后涂膜综合性能的研究；三是氨酯改性的不饱和聚酯的合成，表征，PU-UPE/DVE-3体系光固化动力学研究以及该体系光固化后涂膜综合性能的研究；四是乙烯基醚封端的聚氨酯的合成，表征，VE-PU/马来酸二甲酯体系光固化动力学研究以及VE-PU/DMA体系流变性能和光固化后涂膜综合性能的研究。

Subsequently,enol methylation of P in basic condition completed the synthesis of malyngamide O.Applied this route to the synthesis of malyngamides Q and R,the chiral unsaturated acid was connected with the vinyl chloride part by amidation,then the resulting product was converted into the corresponding aldehyde,followed by aldol condensation of the aldehyde with the chlorotitanium enolate of pyrrolidone to complete the skeleton of malyngamides Q and R,then the synthesis of them was completed via enol methylation in acid condition.

该合成路线拓展应用到malyngamides Q和R的合成时，首先用酰胺键将手性不饱和脂肪酸和烯氯片段连接，再转化成相应的醛，与乙酰基吡咯酮进行TiCl_4催化的aldol反应即得到malyngamides Q和R的骨架结构，再经过酸催化的烯醇甲基化反应完成了Q和R的全合成。

Fluorenyl methoxy carbonylsolid-phase synthesis of Fusukang was studied firstly,including stepwise solid-phase peptide synthesis and solid-phase convergent synthesis.

研究了36肽扶素康的9-芴甲氧羰基法固相化学合成，包括Fmoc固相逐步化学合成和Fmoc固相片断缩合化学合成。

Using the intact G1-nuclei prepared from an isogenic yeast strain lacking mitochondrial DNA , we demonstrated that the DNA synthesis observed within the first 10-20 min was largely due to mitochondrial DNA synthesis, whereas nuclear DNA synthesis did not begin until after a 10-20 min lag period.

利用从缺少线粒体DNA的菌株中制备的完整G1期细胞核，证明了最初10-20min的滞后期内的DNA合成主要是由线粒体DNA合成造成的，而核DNA合成是在经过10-20 min后才开始。

Results (1) the laminin synthesis was significantly improved by PBMC from nontreatment group (P＜0.05);(2) the 3 H-prolin incorporation was significantl decrease in the GEC treated by PBMC supernatant from nontreatment group(P＜0.05);(3) the supernatant of PBMC from nontreatment group stimulated the collagen Ⅲ synthesis(P＜0.05), while, there was no significant difference of collagen Ⅳ synthesis between 4 groups;(4) the activity of PBMC supernatant have no close relation with urinary protein excretion, pathological type and clinical type.

结果 (1)肾病极期未经激素治疗组PBMC上清明显促进了GEC合成层粘连蛋白；(2)未治PBMC上清抑制了GEC合成总胶原；(3)未治组PBMC上清促进了Ⅲ型前胶原的合成，而对Ⅳ型胶原的合成无明显影响；(4)肾病患儿PBMC的上述作用与是否足量激素治疗有关，而与尿蛋白能否阴转、肾组织病理类型、肾病临床类型等无直线相关关系。

At last,a convergent and general protocol to marine natural product,as demonstrated by the enantioselective total synthesis of malyngamides O,P,Q,R, 5"-epi-Q and 5"-epi-R bearing terminal vinylic chloride structure,was developed in detail.E,(7S)-7-methoxytetradec-4-enoic acid was prepared using the above described Johnson-Clainsen rearrangement,the terminal vinyl chloride was constructed using Wittig reaction as key step,the pyrrolidone derivative was constructed using L-serine as natural chiral pool.Starting from the synthesis of malyngamides O and P to explore the general route,an aldol reaction of methyl acetate with the vinyl chloride part in the presence of LDA gave the skeleton of amine portion,followed by amidation with the fatty acid finished the synthesis of malyngamide P.

先以malyngamides O和P为试点探索通用合成路线，将乙酸甲酯和烯氯部分在LDA存在下进行aldol反应得到氨部分的骨架，再将手性不饱和脂肪酸和氨部分进行酰胺化反应完成了malyngamide P的合成，将P在碱性条件下进行烯醇甲基化反应完成了malyngamide O的全合成。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。