查询词典 aspect ratio

To estimate the high signal to noise ratio in every recorded trace using quantitative method and erase the recorded traces with low signal to noise ratio so as to form a standard trace with high signal to noise ratio.

在形成标准道时，利用定量估计信噪比的方法，对每个记录道分段进行信噪比估计，剔除信噪比低的记录段从而形成高信噪比的标准道。

The above method can be used as a general method of determining molecular weight distribution of polymers.4.Solid-state ~1H wide-line NMR and ~(31)p magic angle spinningNMR were applied to a series of PEI/DNA complex samples with different PEI molecular weights and nitrogen/phosphatemolar ratios,in order to disclose the influence of various structural factors on the interactions and morphology.The results of ~1H NMR spectra showed that the linewidth of the PEI signal was greatly broadened with increasing the N/P ratio.Meanwhile,in the ~(31)p M_AS experiment,the signal was found to shift upfield with the increase of the N/P ratio.Both ~1H and ~(31)P NMR experiments demonstrated that the interaction between two constituents and subsequently the morphology of the complexes vary with the N/P ratio.

首次将固体核磁共振应用到聚合物/DNA复合物体系，观察复合物体系中不同N/P比对其相互作用和相结构的影响，研究表明N/P比的变化对聚乙烯亚胺/DNA基因递送体系分子水平上相互作用有着很大的影响；另外，还发现不同分子量的聚乙烯亚胺聚合物载体在N/P比为3的情况下对复合物中DNA的微观尺度没有明显影响；通过氢的自旋扩散实验，首次测得在PEI/DNA复合物体系中DNA相尺寸的大小，并发现在体系中N/P比达到3以上的复合物中DNA和PEI达到了分子水平上的相容。

The dust was first mixed with NaBH4 powder to adjust the H/Cl ratio. Then, the sample was roasted at low temperature to promote the efficiency of dehalogenation/hydrogenation reaction. By way of Cl- titration, it was found that the roasting temperature (300℃~500℃), roasting time (5 to 25 minutes) and H/Cl ratio (6.0 to 20.0) would change the dissolution of Cl- from 0.0% to 17.5%. After caustic roasting and leaching of the dust, the zinc (17.4 g/l) and lead (1.6 g/l) recovery ratio were found to be 82.7% and 61.8% respectively.

利用NaBH4在低温可促进氯化冶金反应的进行，经由氯离子浓度滴定，发现随著焙烧时间、温度及H/Cl比值之调整，氯离子之溶出量变化亦相对改变，此结果说明在使用NaBH4调配H/Cl比值由6.0~20.0的变化下，烟尘中的氯成分在低温(300℃~500℃)焙烧5~20分钟，可与金属氧化物发生氯化反应，氯离子溶出量显示有0~17.5%不等之变化量。

Through researching the mechanism of biological nitrification and denitrification and actual project application of the technology and related literature materials, the obtained results are as follows:(1) Anoxybiosis is effective to the removal of COD; after the anoxic process, BOD/COD of the outflow increases, it shows that the degradation ability of wastewater is improved; anoxybiosis is insensitive when shock loading of inflow wastewater varies greatly;(2) It is demonstrated by the operation of inoculation and cultivating that biofilm takes two weeks to succeed in cultivating on packings and the removal ratios of NH3-N and COD get 50% and 70% respectively, when gas-water ratio is 6:1, HRT is 7.3 hour, water temperature is above 15°C;(3) It is demonstrated that gas-water ratio, hydraulic loading, HRT, temperature, pH etc are important factors which influence the removal effect of pollutants, when the gas-water ratio is 6:1, hydraulic loading is about 0.38kgNH3-N/m~3.d, water temperature ranges from 15°C to 27°C, pH ranges from 7.5 to 8.0, the BIOFOR removal effect of pollutants is the best;(4) The operation indicated that, this technology has strong ability of nitrification and denitrification; it has extremely vital significance for reducing the water body eutrophication;(5) It is confirmed the feasibility and the usability of preanoxic-BIOFOR process to treat L-lactic acid production wastewater. The experiment indicated that the treatment effect of this technology is very good and also shows that the technology has many advantages, such as small volume, high treatment efficiency, good effluent quality and strong endurance to load variation, this technology is a new and economical wastewater treatment process.

通过对生物脱氮机理的研究和该组合技术的实际工程应用，并结合有关文献资料，取得如下结论：(1)预缺氧池对L-乳酸生产废水中的COD去除具有一定的效果；废水中难降解的高分子物质经过缺氧工段分解为易于氧化降解的物质，浮状有机物在水解菌的作用下，将不溶性有机物水解为溶解性物质；预缺氧池具有较强的抗冲击负荷能力；(2)BIOFOR接种挂膜过程表明：HRT为7.3h、气水比为6：1、水温保持在15℃以上，经过半个月生物膜即以形成，NH_3-N和COD的去除率分别达到50％和70％左右；(3)研究表明：气水比、水力负荷、HRT、温度、pH等是影响污染物去除效率的重要因素，在气水比为6：1，NH_3-N容积负荷为0.38kgNH_3-N／m~3·d，温度在15℃-27℃，pH在7.5-8.0之间的条件下，BIOFOR对污染物的去除效率达到最佳；(4)运行表明，该组合技术具有较强的脱氮能力，对于减少水体富营养化具有十分重要的意义；(5)经过半年多实际工程的现场调试与运行，验证了利用预缺氧—BIOFOR组合工艺处理L—乳酸生产废水的可行性和实用性，得出该组合技术具有占地面积小，处理效果好，运行费用省，耐冲击负荷能力强等优点，是一项新型、经济的污水处理技术。

Moreover, according to element compositions in mussels, these fishes were divided into three groups. The first group was characteristic with low phosphorus and high C/N ratio including Engraulis japonicus, Conger myriaster and Scomberomorus niphonius. The second had low phosphorus and low C/N ratio including fishes such as lower and middle carnivores such as Pseudosciaena polyactis, Platycephalus indicus and Argyrosomus argentatus. The third included some cold temperatefishes such as Scomberomorus niphonius and Liparis tanakae that were high phosphorus and low C/N ratio.

此外，根据鱼类的肌肉元素组成，将鱼类分为3类：第一类的主要特征为低磷、高C／N比值，主要包括鳀鱼、星康吉鳗和带鱼；第二类种类最多，主要包括小黄鱼、鲬和白姑鱼等中、低级肉食性鱼类，其元素组成特征为低磷、低C／N比值，；第三类的主要大泷六线鱼、细纹狮子鱼等冷温性鱼种为主，元素组成特点为高磷、低C／N比。

Critical C/Fe ratio as a new concept has been put forward in this paper, when the amount of carbon adding into pellet large than critical C/Fe ratio, it will results that the S% of DRI goes beyond the criterion so that EAF refuse to use it, when less than critical C/Fe ratio, it will accelerate reduction and desulphur.

文章根据热态DRI的再氧化机理，提出了一种利用半熔融密封料覆盖反应罐口的防再氧化理论，在还原温度时半熔融密封料熔化成液相，将罐口密封，反应罐冷却时，这层半熔融密封料凝固并和罐壁紧密结合，阻止氧化性气体的侵入，达到防氧化的目的。

Retrospectively analyses 125 cases respiratory failure patients remedied by tracheal intubation in our hospital from 2001-04 to 2004-09. Comparing achievement ratio, time of detained airtube,incision of trachea ratio, extubate ratio, and sufferers' post-recovery condition of nasal trachea cannula under the guidance of fibrobronchoscope and oral trachea cannula under the guidance of laryngeal endoscope.

对我院2001年4月至2004年9月经气管插管救治的125例呼吸衰竭患者资料作回顾性分析，对纤支镜引导经鼻插管与经口喉镜明视插管各自成功率、留管时间、气管切开率、拔管率及患者的愈后情况进行比较。

Retrospectively analyses 125 cases respiratory failure patients remedied by tracheal intubation in our hospital from 2001-04 to 2004-09. Comparing achievement ratio, time of detained airtube,incision of trachea ratio, extubate ratio, and sufferers' post-recovery condition of nasal trachea cannula under the guidance of fibrobronchoscope and oral trachea cannula under the guidance of laryngeal en dos cope.

对我院2001年4月至2004年9月经气管插管救治的125例呼吸衰竭患者资料作回顾性分析，对纤支镜引导经鼻插管与经口喉镜明视插管各自成功率、留管时间、气管切开率、拔管率及患者的愈后情况进行比较。

In Fagopyrum esculentum grown under different density and sowing date, there was significant plasticity in stem mass ratio, leaf mass ratio and leaf to root ratio, as well as single measures of stem length, stem diameter, branch length and number of branches.

在不同密度和播期下种植的荞麦，茎生物量分配、叶生物量分配、叶根比，及单株茎长、茎直径、分枝长和分枝数都有显著的可塑性。

The volume ratio of furaldehyde to acetic anhydride is 1∶2; the mole ratio of furaldehyde with anhydrous potassium carbonate is 1.00∶0.54. The best phase transfer catalyst is PEG1000, the mass ratio of PEG1000 with furaldehyde is 4.3%, the reaction time is 11 min, the reaction power of microwave is 260 W. The yield ofα-furanacrylicacid is up to 72.3% under these reaction conditions.

研究结果表明：在微波辐射功率为260 W、微波反应时间为11 min、以聚乙二醇1 000(PEG1000)为相转移催化剂，糠醛与乙酐的体积比为1∶2，糠醛与无水碳酸钾的量比为1.00∶0.55时，α-呋喃丙烯酸的产率为72.3%。

These rules reflect some inherent feature of self and nonself, and they are the basic detection criterion of GECISM.

这些规则反映了"自我"和"非我"的内在特征，是GECISM进行"非我"检测的判据。

Until today, the media from China and the outside world still uses the term "Post 89". Regardless to whether it is for commercial gimmick or convenience, everybody still remember "Post 89", a term which carries a strong Cantonese accent.

时至今日，国内外艺术媒体还是在沿用&后八九&这个称谓，不管当初是为了商业噱头还是容易上口好记，反正大家现在是记住了&后八九&这个广东口音很重的词。