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Phthalic acid esters are widely used in the many fields of industry. So many countries including China have come to pay attention to them and make up the codes for limiting the content in some products such as textile. By combining international codes, the thesis selects coating and textile that have close relative with people as objections. The research results are as follows:1. The thesis has established the textiles preparation method by a series of experimentations such as extraction solvent, extraction time, solid-phase extraction. The average recoveries of eleven phthalates are from 80.30% to 98.00%, and the relative standard deviations from 0.59% to 2.56%, the results show that this method is accurate and credible.2. The thesis set up the simultaneous determination of benzene, toluene, xylenes and phthalates in coatings.
邻苯二甲酸酯类化合物被广泛地应用在工业领域的各个方面,国际上已经开始重视邻苯二甲酸酯作为一种内分泌干扰素的危害性,对在一些产品中的用量作出了限制,但没有具体的分析测定方法,本论文结合国际法规选择了与人们生活密切相关的涂料和纺织品来研究其中邻苯二甲酸酯类环境激素的测定方法,研究内容如下:(1)通过对提取溶剂、提取方式、提取时间的选择实验以及固相萃取的一系列条件实验,首次建立了纺织品中测定邻苯二甲酸酯类环境激素的前处理方法,并对分析方法作了准确度、精密度验证。
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Extract 3 'Sometimes we came upon a station close by the bank, clinging to the skirts of the unknown, and the white men rushing out of a tumbledown hovel, with great gestures of joy and surprise and welcome, seemed very strange-- had the appearance of being held there captive by a spell. The word 'ivory' wouldring in the air for a while - and on we went again into the silence, along empty reaches, round the still bends, between the high walls of our winding way, reverberating in hollow claps the ponderous beat of the stern wheel. Trees, trees, millions of trees, massive, immense, running up high; and at
有时我们会经过紧挨着河岸,紧挨着那片未知地域边缘的一个贸易站,白人们从一间摇摇欲坠的茅屋里冲出来,打着很多表示高兴、惊奇和欢迎的手势,看起来十分古怪—看上去像是被符咒镇在那儿当了俘虏,'象牙'这个词照例会在空气中回响一阵子—然后又一次驶入寂静,沿着一片没有人烟的水道,绕过一个个平静的转角,穿过蜿蜒航程中的峭壁,船尾外轮沉重的击水声空洞地回响着。
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Of its light weight, small size, easy to install in the HQ44/45X slightly resistance ball-Like check valve flange between the valve-house by two semi-circular springs and board composition, with the pin fixed to the valve on the valve plate to close the spring deformation, fluid pressure exerted by the spring to open the deformation rapidly, so to protect pipelines from water hammer damage.
其重量轻,体积小,容易安装在法兰之间,阀门内部由两个半圆弹簧和板面组成,用销子固定在阀体上弹簧形变使阀板关闭,流体压力又使其开启弹簧的形变很快,这样能保护管道免受水锤破坏。
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During the four years study on the project, we develop a dynamical forecast model that describing the subtropical ridge surface. A new theory on the role of the land-sea thermal difference on the formation of the Subtropical High is advanced. It is concluded that in the summer subtropics over each continent and its adjacent ocean LO, SE, CO, and a double-dominant heating from west to east compose a LOSECOD heating quadruplet. The influence of the Eurasia continent on SH varies according to the seasonal variation. From the ideal numerical simulation it is shown the important role of the Eaiuan continent and the huge topography on the mechanism of formation and mantanence of the SH during the summer. It is verified by the numerical simulation that the extension of the subtropical continent into the tropics greatly enhances the " East Asian monsoon". Through the Rossby energy dissipation theory it is verified that the deep latent convective heating induces the onset of the South China Sea monsoon over the Bay of Bengal. The relationship and mechanism between the precipitaiton over the East Asia and the Subtropicla high is illustrated by the data. It is also found the close phase lock between the east-west shift of the SH and the disturbence of the east wind belt over the tropical troposphere. The interaction between the structure and activity feature of the SH and the Meiyu over the Yangtze-Huaihe river valley is revealed from the data. The numerical simulation verified the impact of the different SH pattern on the path of the typhoon.
本项目的研究发展了描述副热带高压脊面变化的动力模型,提出了夏季副热带地区四叶型非绝热加热分布型及相应环流拼图的创新理论;明确了大陆尺度的海陆热力差异在副热带高压形成中的作用;指出欧亚地形对副热带高压和气候的影响随季节变化而变化,通过数值试验证明春季青藏高原的感热加热对亚洲夏季风的爆发地点起了&锚定&的作用,进一步证实了副热带高压断裂和亚洲夏季风的最早爆发地点发生在孟加拉湾东岸;利用Rossby波能量频散理论证明了孟加拉湾深对流潜热释放诱导南海季风爆发的机制;揭示了东亚季风降水的季节内变化与西太副高的关系及机理;揭示了西太副高与东西风带中扰动之间的相互作用过程,指出西太副高的东西活动与热带对流层上空东风带扰动和中纬度西风带扰动的移动和锁相密切相关;研究了夏季淮河流域梅雨期间副高结构和活动特征及其与江淮暴雨的相互作用;验证了不同副热带高压形态对台风路径的不同影响;通过数值试验证明了欧亚大陆和青藏高原等大地形对副热带高压形成和维持的重要作用。
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The conveyed medium can't be leaked outside. Thus it will not cause the environmental pollution and human body safety dangerous while exhausting the toxin and flammable or corrosive medium. 5、No electricity. It's safe and reliable while using in the flammable and explore places. 6、It can be soaked in medium. 7、It's convenient to use and reliable to work. Only open or close the gas valve body while starting or stopping. Even if no medium operation or pausing suddenly for long time because of accident matters, the pump will not be damaged caused by this. Once over-loading, the pump will automatically stop and possesses the self-protection function. When the load recovers normally, it also can start automation. 8、Simple structure and less wearing parts. This pump is simple in structure, installation and maintenance. The medium conveyed by the pump will not touch the matched pneumatic valve and coupling lever etc. not like other kinds pumps, the performance will drop down gradually because of the damages of rotor, gear and vane etc. 9、It can transmit the adhesive liquid (the viscosity is below 10000centipoise) 10、 This pump needn't the oil lubricant. Even if idling, it has any influence to the pump. This is a characteristic of this pump.
所以抽送有毒、易挥发或腐蚀性介质时,不会造成环境污染和危害人身安全; 5、不必用电,在易燃、易爆场所使用安全可靠 6、可以浸没在介质中工作 7、使用方便、工作可靠、开停只需简单地打开和关闭气体阀门,即使由于意外情况而长时间无介质运行或突然停机,泵也不会因此而损坏,一旦超负荷,泵会自动地停机,具有自我保护性能,当负荷恢复正常后,又能自动启动运行; 8、结构简单、易损件少,该泵结构简单,安装、维修方便,泵输送的介质不会接触到配气阀,联杆等运动部件,不像其他类型的泵因转子、活塞、齿轮、叶片等部件的磨损而使性能逐步下降; 9、可输送较粘的液体(粘度在1万博以下); 10、本泵无须用油润滑,即使空转,对泵也无任何影响,这是该泵一大特点
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CWB1 performance is followed by petrochemical stocks, shares closed slightly in the red is the limit stimulated by the rapid increase of more than 10%, higher shock in the afternoon, the highest intraday rise up 19.52 percent, to close up 14.98 percent, the highest card or subscription list first.
CWB1的表现是石化股票后,股价在红色略有是由10%以上的快速增长,在下午增加刺激的极限冲击,最高增长百分之盘中上涨19.52,收盘上升百分之14.98,最高卡或订阅列表中的第一。
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Before the earthquake a day or two, cattle, horses do not rush into the ring, bouncing bounce chaos, more than bray, disturbed by the irritating, reducing diet; some do not feed Zhu Yang, disturbed by the irritating, Luancuan run; Kuangjiao more than a dog; Not chicken into the nest, fear not cry; not duck into the water; chaos rabbit hop bounce, and alarm; pigeons in a few days before the earthquake Jing Fei, did not return to the nest; close to a pot of bees to fly away to a pot; response to the most sensitive rats , In the earthquake the previous day to a few days, the mice to run all of a sudden a light, and some small mouth moving rats; some of the snakes out of hibernation outside, a tree; bounce You panic shore fish, such as Potentilla belly.
震前一、二天,牛、马赶不进圈,乱蹦乱跳,嘶叫不止,烦燥不安,饮食减少;一些猪羊不吃食,烦燥不安,乱跑乱窜;狗狂叫不止;鸡不进窝,惊啼不止;鸭不下水;家兔乱蹦乱跳,惊恐不安;鸽子在震前数天惊飞,不回巢;密蜂一窝一窝地飞走;老鼠反应最灵敏,在震前一天至数天,老鼠突然跑光了,有的叼着小老鼠搬家;有些冬眠的蛇爬出洞外,上树;鱼惊慌乱跳游向岸边,翻白肚等。震前动物有预兆;老鼠搬家往外逃;鸡飞上树猪拱圈;鸭不下水狗狂叫
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The results show that the erosion volume grows with the increment of pump pressure, there are best rock-breaking jet length, abrasive concentration and particle size. In low concentration, the erosion energy of post-mixed pulsed abrasive jet is close to the pre-mixed pulsed abrasive jet. After the external fluid is drawn in, the jet dynamic pressure increases by 7%, while pulse amplitude increases by 150%.
结果表明:冲蚀体积随泵压增大而增加,存在破岩的最佳喷距、磨料浓度和磨料粒径;在较低浓度下,后混合磨料脉冲射流的冲蚀性能较接近于前混合磨料脉冲射流;引入外部流体后射流的动压力增大了7%,脉冲幅值提高了1.5倍。
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Judging from the historical change of international legislation concerning the onus probandi allocation of the carrier in sea transportation claims and from the challenges of theories of the onus probandi by some of China's legislative regulations, there is not a general standard for the allocation of onus probandi. There is a close relationship between this allocation and civil responsibility. In present age, China can consider solve the allocation of onus probandi by means of legal explanation.
从关于海运索赔中承运人过失举证责任分配的国际立法的历史变化和部分国内立法的有关规定对举证责任分配诸学说的挑战中得到的启示是,不存在举证责任分配的一般性标准,更不应过于迷信罗森贝克的规范说;举证责任分配与民事责任之间存在密切联系;我国目前可以考虑用法律解释的方法解决举证责任分配问题。
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Numerical results show that THMD s et can achieve an effect close to that of an ordinary TMD,while out performing TLD and TLCD,that the control-ling performance of THMD set b y the optimum dynamic method is much better than that set by the ge neral methods,and that the design of THMD dimension set by the opti mum dynamic method is more reasonable for using the structural inner s pace.
算例分析表明,THMD可取得与TMD相当,优于TLD、TLCD的控制效果;而运用最优动力方法设置的THMD的控制性能明显优于普通方法,并为适应结构物内部使用空间要求提供了更为宽松的条件。
- 推荐网络例句
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But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
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Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
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Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。