英语人>网络例句>二 相关的搜索结果
网络例句

与 二 相关的网络例句 [注:此内容来源于网络,仅供参考]

This design is low stretch of 30,000 tons of high-strength type polyester production workshop after preliminary design, high low stretch of polyester staple fiber dosage is in the biggest species, it is PTA or dimethyl terephthalic acid and glycol as raw materials via esterification or the ester exchange reaction and condensation of terephthalic acid polymer fibre - together into glycol, this design USES Germany JiMa process, high scientific and technological content, is a kind of high strength, good elasticity, and heat resistance, good abrasion resistance, corrosion resistant polyester.

帮忙把涤纶论文绪论翻译成英语,要求不用翻译软件,可以用软件查单词本设计是"年产30000吨高强低伸型涤纶短纤维后加工生产车间初步工艺设计",高强低伸型涤纶短纤维是涤纶短纤维中用量最大的品种,它是以精对苯甲酸或对苯甲酸甲酯和乙醇为原料经酯化或酯交换和缩聚反应而制得的成纤高聚物——聚对苯甲酸乙醇酯,本设计采用德国吉玛工艺,科技含量较高,是一种强度高、弹性好、耐热性好、耐磨性好、耐腐蚀的涤纶短纤维。

Secondly, in our methods, the essential geometry of the image single axis geometry may be specified by six parameters and this may be estimated from one conic and one fundamental matrix (a total of 12 parameters) or may be minimally estimated from two conics (a total of 10 parameters).

本文证明了单轴旋转运动的不变量可以通过一个基本矩阵和一条次曲线来确定,在这种情况下,由于基本矩阵的自由度为7,次曲线的自由度为5,所需确定的参量个数仅为12,大大减少了不变量的计算量;本文同时证明单轴旋转运动的不变量可以通过最少两条次曲线来确定,在这种情况下所需确定的参量个数仅为10,该方法是目前同类算法中参数最少的;本文提出了用多条次曲线求解单轴旋转运动的不变量的最大似然估计算法,其所需确定的参量个数为6+2n,其中n为次曲线的个数,该公式更深刻地反映了次曲线与不变量的参数关系。

Yes. From Roundwood reservoir in county Wicklow of a cubic capacity of 2400 million gallons, percolating through a subterranean aqueduct of filter mains of single and double pipeage constructed at an initial plant cost of 5 pounds per linear yard by way of the Dargle, Rathdown, Glen of the Downs and Callowhill to the 26 acre reservoir at Stillorgan, a distance of 22 statute miles, and thence, through a system of relieving tanks, by a gradient of 250 feet to the city boundary at Eustace bridge, upper Leeson street, though from prolonged summer drouth and daily supply of 12 1/2 million gallons the water had fallen below the sill of the overflow weir for which reason the borough surveyor and waterworks engineer, Mr Spencer Harty, C.

48流了。从威克洛郡的容积十四亿加仑的朗德伍德水库,流经达格尔河、拉思唐、唐斯峡谷和卡洛希尔,流进坐落于斯蒂尔奥根那十六英亩的水库,中间的距离是法定英里。这条有着过滤装置的第一期施工的单管及复管地下引水渠,根据合同直线每码的铺设费为五英镑。再由一批水堰进行调节,以百五十英尺的坡度在上利森街的尤斯塔斯桥流到本市界内。但是由于夏季久旱,再加上每天供水一千百五十万加仑,水位已降到低于排水口。

A better understanding of the role of PPAR in insulin action system will be critical in developing more efficacious and safe agent s that act on PPAR and benefit patients with type 2 diabetes. The main content is followed: Synthesis and analysis of 1,3-dicarbonyl compounds. Make use of easily available cheap reagent such as 2-naphthol, 6-hydroxyquinoline, 1,2-dibromoethane, 4- hydroxybenzaldehyde, dimethyl malonate, 2-{4- [(2-napthoxy)ethoxyl] benzyl} malonates and 2-{4 [(1,2,3,4-tetrahydro-6 -quinolinoxy)ethoxyl] benzyl } malonates were synthesized through 6-8 steps in virtue of Williamson, Knoevenagel reaction, Pd/C catalyzed hydrogenation with mild conditions and high yield. The total yield of 40-50%.

本论文的主要内容和研究结果如下: 1,3-羰基类化合物的合成及分析,采用2-萘酚、6-羟基喹啉、1 ,2溴乙烷、对羟基苯甲醛、丙甲酯等常见易得试剂,利用Williamson反应、Knoevenagel反应、钯碳加氢等条件温和且收率高的方法,分别合成了2-{4- [(2-萘氧)乙氧基]苄基}丙酸衍生物和2-{4 [(1,2,3,4-四氢-6-喹啉氧基)乙氧基]苄基}丙酸衍生物两个系列8个化合物,经6-8步反应,总收率为40-50%,具有一定绿色化学特性。

The main products are: calcium sulfate / calcium nitrate / calcium carbonate / copper sulfate / chloride, copper / zinc sulfate / nitric acid zinc / zinc chloride / potassium sulfate / potassium chloride / potassium bromide / potassium aluminum sulfate / potassium dihydrogen phosphate / 2 of potassium hydrogen phosphate / sodium bromide / sodium chloride / sodium nitrate / sodium fluoride / trisodium phosphate / sodium dihydrogen phosphate / disodium hydrogen phosphate / crystallization of sodium carbonate / anhydrous sodium carbonate / aluminum sulfate / nitrate aluminum / crystallization of aluminum chloride / aluminum hydroxide / nitrate Fe / hydrobromide / oxalic acid / boric acid / citric acid / barium chloride / Azone / magnesium sulfate / magnesium nitrate / magnesium chloride / ammonium chloride / ammonium sulfate / Bifluoride ammonium / ammonium aluminum sulfate / ferrous ammonium sulfate / ammonium dihydrogen phosphate / diammonium hydrogen phosphate / bromide / tetrabutylammonium bromide / chloride, nickel / nickel nitrate / sulfate nickel / cadmium chloride / cadmium sulfate / nitrate Cadmium / Cadmium Carbonate / Strontium / strontium nitrate / sulfuric acid manganese / manganese chloride / 50% manganese nitrate solution / stannous chloride / zinc chloride, such as crystallization of the four largest packing of chemical reagents AR and CP level.

主要产品有:硫酸钙/硝酸钙/碳酸钙/硫酸铜/氯化铜/硫酸锌/硝酸锌/氯化锌/硫酸钾/氯化钾/溴化钾/硫酸铝钾/磷酸氢钾/磷酸氢钾/溴化钠/氯化钠/硝酸钠/氟化钠/磷酸三钠/磷酸氢钠/磷酸氢钠/结晶碳酸钠/无水碳酸钠/硫酸铝/硝酸铝/结晶三氯化铝/氢氧化铝/硝酸铁/氢溴酸/草酸/硼酸/柠檬酸/氯化钡/氮酮/硫酸镁/硝酸镁/氯化镁/氯化铵/硫酸铵/氟化氢铵/硫酸铝铵/硫酸亚铁铵/磷酸氢铵/磷酸氢铵/溴化铵/四丁基溴化铵/氯化镍/硝酸镍/硫酸镍/氯化镉/硫酸镉/硝酸镉/碳酸镉/碳酸锶/硝酸锶/硫酸锰/氯化锰/50%硝酸锰溶液/氯化亚锡/结晶四氯化锌等大包装化学试剂的AR和CP级别。

On the NiO/SiO〓 catalyst prepared by IM, the main hydrogenation product of MA was SA, the activity and selectivity were almost no relation with the nickel content and nickel species 3. Summarizing the characterization and activity evaluation of the catalysts, we concluded: On nickel based catalyst, when NiO was crystallite, and the Ni〓 that was prepared by reducing, hydrogenation of the MA could lead to SA but not to γ-BL; when NiO was cluster and had a properly interaction with the support, the Ni〓 prepared by reducing, could hydrogenate MA to SA then to γ-BL. When NiO cluster and crystallite were both existed on the catalyst, the hydrogenation products were mixture of SA and γ-BL, and the amounts of SA and γ-BL were related with the ratio of cluster and crystallite.

综合催化剂的表征和活性评价得出:当镍基催化剂上氧化镍以结晶态存在,经氢还原后的零价镍可使顺丁烯酸酐加氢得到丁酸酐,丁酸酐难以进一步加氢为γ-丁内酯;当镍基催化剂上氧化镍以簇团形式存在,与载体之间有适当的相互作用时,经氢还原后的零价镍可使顺丁烯酸酐加氢得到的丁酸酐进一步加氢为γ-丁内酯;若催化剂上氧化镍既有结晶态又有簇团形式时,随者含量比例不同而得到丁酸酐和γ-丁内酯的混合物。

Diamino-3,5-dinitropyridine and 2,6-diamino-3,5-dinitropyridine-1-oxide was reacted with aqueous ammonia and KMnO4 under different conditions. Substitutions in the 4 position to the nitro group were obtained with high yields: 2,4,6-triamino-3,5-dinitropyridine (81.5%) and 2,4,6-triamino-3,5-dinitropyridine-1-oxide (85.4%).

以氨水为胺化剂,KMnO4为氧化剂,在不同反应条件下实现2,6-氨基-3,5-硝基吡啶和2,6-氨基-3,5-硝基吡啶-1-氧化物4位的氧化胺化反应,目标化合物2,4,6-三氨基-3,5-硝基吡啶和2,4,6-三氨基-3,5-硝基吡啶-1-氧化物的收率分别达到81.5%和85.4%。

The conclusions were as follows: theνO-H andνC=O IR absorption maxima shifted towards higher wave numbers after imprinting 17β-estradiol on TFMAA-co-TRIM copolymer with the red shift of theνO-H groups being apparent after precipitation polymerization for 16h while that forνC=O groups being observed after polymerization for 24h. A strong interaction between TFMAA and 17β-estradiol was confirmed by the high selectivity for 17β-estradiol, as indicted by the values of the separation factor of isomers of 17β-estradiol/17α-estradiol (2.28) and the imprinted factor (3.01). Particle diameter of TFMAA-co-TRIM polymer was between 300 nm and 1.5μm, which suited well for solid phase sorbent throughout at low column pressure. The recognition of imprinting TFMAA-co-TRIM polymer for sterol molecules was driven by enthalpy eluted with acetronitile, and low temperature was in favor of the separation of sterol structure analogues on imprinting column. TFMAA-co-TRIM polymer possessed of determinate anti-heat stability, with melting point beginning at 255.84℃, Tp=257.40℃, control TFMAA-co-TRIM polymer and imprinting TFMAA-co-TRIM polymer were respectively decompounded at 267.79℃and 343.11℃, and solid micro-extraction noddle prepared by the special polymerization also showed definite recognition for 17β-estradiol by GC/MS detecting at 270℃. By selection of various washing and elution solvents, elution reagents of close polymerization system were of more advantage in template molecules retention and recognition on molecularly imprinted solid phase extraction column. At a certain extent, progesterone, 17α-estradiol, 17β-estradiol and 4-androstene-3, 17-dione could be intercepted on the MISPE column. Especially, MISPE had high selectivity for progesterone, and imprinting TFMAA-co-TRIM polymer could achieve adsorption balance within 50 min by absorption kinetics test for 17β-estradiol. However, MISPE column showed better selectivity and enrichment property for 17β-estradiol than C18 and CSPE columns according to the data from HPLC and GC/MS analyses. Recovery of 17β-estradiol on MISPE column was up to 85.5% while when prime extracting solution of milk powder was sampled, the recovery of CSPE and C18 columns were 43.7% and 30.7%, respectively.

通过研究阐明:紫外聚合产物TFMAA-co-TRIM中的νO-H振动吸收峰在聚合16h后红移,νC=O振动吸收峰在聚合24h后红移;TFMAA-co-TRIM对雌醇异构体的印迹因子达到了3.01,α为2.28,优于其它功能单体参与得到的聚合物识别特性;TFMAA-co-TRIM聚合物粒径介于300 nm至1.5μm之间,作为色谱固定相具有良好的通量和低的柱压;在乙腈流动相中,TFMAA-co-TRIM分子印迹固定相的分离过程主要被焓驱动,低温有利于分子印迹固定相分离甾醇结构类似物;TFMAA-co-TRIM分子印迹聚合物在255.84℃时开始熔融,Tp=257.40℃,聚合物CP的降解温度在267.79℃,MIP降解温度在343.11℃,制备的固相微萃取头初步经GC/MS 270℃的耐热性测定;不同的洗提溶剂筛选证明了选择接近聚合溶剂的洗脱体系更有利于MISPE发挥识别效应;分子印迹固相萃取柱对孕酮、17α-雌醇、17β-雌醇和雄烯酮都具有不同程度的保留特性,可作为此类化合物的吸附材料,特别对孕酮强保留的富集特性,可作为孕酮的选择性识别吸附剂,其分子印迹聚合物对17β-雌醇的吸附动力学测定显示在50 min内基本达到吸附平衡,具有作为传感器核心敏感材料的潜力;对比萃取奶粉中17β-雌醇性能,MISPE柱比非分子印迹固相萃取柱和C18柱具有更高的保留,回收率依次为85.5%,43.7%和30.7%。

A novel solvothermal synthesis method for direct preparing of crystals of copper phthalocyanine is presented in this article.

我们使用三种原料合成酞菁铜晶体:一是邻苯腈、钼酸铵和水乙酸合铜为起始原料;是1,3-亚胺基异吲哚啉和水乙酸合铜为起始原料;三是邻苯腈、氧化铜和钼酸铵为起始原料。

This thesis introduces the basic principle of the least square data fitting.. According to the least square data fitting ,the paper studies and analyzes the linear least square fitting ,the quantic least square fitting and nonlinear least square fitting respectively . By using the mathimatic instrument Matlab , this paper shows a lot of examples of interrelated questions. Using Matlab makes the theory of data fitting easier to be understood.

本文介绍了最小乘数据拟合法的基本原理,并根据最小乘数据拟合方法,分别针对线性最小乘拟合、多项式最小乘拟合,非线性最小乘拟合(lsqcurvefit、nlinfit、lsqnonlin、以及非线性的线性化)、多元最小乘拟合进行了分析和研究,并通过数学工具Matlab实现了对相关问题的举例应用,使相关数据拟合理论更加生动易懂。

第12/100页 首页 < ... 8 9 10 11 12 13 14 15 16 ... > 尾页
推荐网络例句

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。