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The structural and photocatalytic properties of TiO〓 as well as surface acidity were greatly improved by sulfation. SO〓〓/TiO〓 solid superacid with Hammett constant Ho less than -12.14 was prepared by treating the TiO〓 with 1.0mol. L〓 sulfuric acid solution and then calcining at 450℃ for 3h. When compared to unmodified TiO〓, the SO〓〓/TiO〓 superacid catalyst exhibited higher anatase content, smaller crystal size, higher specific surface area, centralized pore size distribution, and the blue-shifted band edge of uv-vis adsorption spectra. Furthermore, the SO〓〓/TiO〓 superacid also showed excellent reaction activity and stability for CH〓Br photocatalytic decomposition even under the moist reaction conditions. The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.
研究结果表明:SO〓〓与TiO〓表面的结合为螯合式双配位结构;TiO〓光催化剂表面经H〓SO〓浸渍处理后,提高了表面酸性,改善了催化剂结构和光催化性能,当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时,可制得SO〓〓/TiO〓超强酸催化剂(H〓<-12.14),其结构和光催化活性得到明显改善,与TiO〓相比,SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移,具有优异的光催化氧化活性、稳定性及抗湿性能,光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级,是一种有实际应用前景的高效光催化剂;由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型,认为在SO〓〓/TiO〓超强酸催化剂表面,由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心,其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移,具有可逆吸附水的性能,是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。
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The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.
研究结果表明:SO〓〓与TiO〓表面的结合为螯合式双配位结构;TiO〓光催化剂表面经H〓SO〓浸渍处理后,提高了表面酸性,改善了催化剂结构和光催化性能,当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时,可制得SO〓〓/TiO〓超强酸催化剂(H〓<-12.14),其结构和光催化活性得到明显改善,与TiO〓相比,SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移,具有优异的光催化氧化活性、稳定性及抗湿性能,光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级,是一种有实际应用前景的高效光催化剂;由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型,认为在SO〓〓/TiO〓超强酸催化剂表面,由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心,其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移,具有可逆吸附水的性能,是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。
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Through designing of composition and structure of the bioactive graded coating,innerstress and its distribution in the coating were analyzed and calculated, the resultsshowed that when composition distribution coefficient n was 1.5, a reasonable stressdistribution could be got, that was at the beginning of deposition the suspension containingrichly BG granules was used so that a rich BG granules layer, a good transitional layerbetween BG layer at the bottom and the coating could be obtained at the titanium alloy side,the bottom of the coating; the stress value near the interface and surface and its character,pressure stress or tensile stress, were decided by the character of its composition itself.Changing composition distribution coefficient n could only change the variation tendency ofstress in the coating, but did not change the stress distribution rule in the coating. Thethinner the coating is, the sharper stress variation in the coating is, which does not mean thatthicker coating is better because the thicker the coating is, the little the permitteddeformation of coating is, so the coating thickness should be thinner, for example, about50μm for bending applications, but for applications only bearing pure shear stress, such asroot of tooth implant, the coating can be thicker little, for instance, about 80~100μm. The study on electrification characteristic and electrophoresis deposition of HAand BG granules in aqueous and non-aqueous solution system found that EPD almost didn'toccur in aqueous solution system. However, because HA granules take position charges inabsolute alcohol, a homogeneous EPD be carried out on the cathode titanium alloy slice, but taking negative charge in absolute alcohol the BG granules not be deposited on the cathode. A guided HA crystallizing, 100~300nm, on surface of the BG granules be realized by metathetical reaction, which cover BG granules with HA microcrystals and make the covered BG granules taking position charges in absolute alcohol, sequentially realize the EPCD of the BG and HA granules on the cathode, so it is feasible to make a titanium alloy/BG/HA bioactive graded coating by making use of EPCD technology. The corrosion experiment of rich boron bioglass coating and plasma spray coating showed that split phase, rich boron and rich silicon phase, occurred during its preparation. In basic medium the corrosion behavior of 〓 BG coating showed uniformity corrosion, the corrosion mostly occurred at rich boron phase area, therefore batch formula design of BGshould avoid the occurring of split phase. The corrosion appearance of plasma spray coatingappeared a non-uniform corrosion, mostly occurred at the edge of the laminated HA moltendrops, and emerged an accelerated corrosion tendency, which will easyly lead to corrosioncrackles extending to the interface and the happening of osmotic interfacial corrosion, thatmay be one of the major reasons leading to the coating cracking-off in the later period. Thetesting results of thermal expansion coefficient of 〓 and 〓BG showed the thermalexpansion coefficient of 〓 BG matched with that of titanium alloy better, and 〓 BG couldsinter with titanium alloy into densification enamel layer at low temperature (720℃).
将Ti6Al4V合金在1000℃下进行真空热处理会降低其力学性能,且合金内的V元素会向表面富集,因此,钛合金真空热处理和表面涂层的烧结温度不能过高,即应低于其相转变点;通过对生物活性梯度涂层的组成和结构的设计,分析和计算了梯度涂层内的应力大小和分布,结果表明:对于本研究,当成分分布系数n=1.5时,可以获得较合理的涂层力学性能,即在沉积开始时,采用富含BG颗粒的悬浮液,以便在钛合金侧获得同底层BG有良好过渡的富BG涂层;梯度涂层界面和表面的应力大小、性质由材料组成本身的性质决定,改变成分分布系数,只能改变涂层内应力变化的趋势;涂层的厚薄不影响涂层内的应力分布规律,但涂层越薄,涂层内的应力变化越快,但这并不意味着涂层越厚越好,因为涂层越厚,涂层允许的变形越小,对于应用于弯曲受力部位的涂层而言,涂层应薄一点为好(50μm);而对于仅纯受剪切应力的部位,如牙根种植体,涂层可适当加厚(80~100μm);通过对HA和BG颗粒在水溶液体系和非水溶液体系中的带电特性和电泳沉积的研究发现,它们在水溶液体系中很难发生电沉积;在无水乙醇溶液中,HA颗粒带正电,可在阴极钛合金片上发生均匀的电泳沉积,而BG颗粒则带负电荷;利用复分解反应法,可以制得100~300nm的HA,通过诱导HA在BG颗粒表面结晶,可对BG颗粒进行表面包覆,获得了被HA包覆的BG颗粒,改变了BG颗粒表面的带电特性,使BG和HA颗粒在无水乙醇中均带上正电荷,从而实现了HA和BG颗粒在阴极上的共沉积。
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Based on the investigation on the various results of the race YUNCAN 7 and YUNCAN 8 and analysis on the result items, the found shown the effect of cocoon number per kg on the some items of cocoon production and egg production, that was negative relation between cocoon number per kg and cocoon production per g of new hatched larvae, egg production per g of new hatched larvae, and hatch-ing percentage; positive relation between cocoon number per kg and egg number per g and no effect on other items.
对云南省桑蚕普种场2005年春季不同生产小组饲育的云蚕7、云蚕8蚕品种各项成绩进行了综合调查,通过对其调查的有关项目数据进行分析总结,发现蚕茧成绩中的&kg茧粒数&对蚕茧成绩中和蚕种成绩中的部分项目产生了影响,即:&kg茧粒数&与&g蚁收茧量、g蚁制种量、孵化率&呈负相关性,&kg茧粒数&与&g卵粒数&则呈正相关性。而对其它一些项目则无影响。
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Can modify whole station program namely at most, 2007, I did my individual website, content of it doesn't matter, the page is simple, do not have discharge at all, because do not have time, also not was in charge of a website all the time, 08 year arrived, I have enough time bubble to be on the net, begin to care the station that has me to come, made the best of time to arrange the website one time, made some of self-help chain, sent dot rubbish to stick promotion to other forum, ah, do not see effect, wander in a few Ip everyday, really pained, the night of Yuanxiao, a person is dull, net of all night on preparation, admire to comparative on the net according to the door in the discovery on the net innocently fire, I had not heard of this thing before, do not follow to go up tide, do not have method ~~, one is searched on the net, stick in Baidu good found a few pieces of relevant pictures not easily, ah, stick to my forum immediately.
顶多就是能修改一下整站程序,2007年,我做了我的个人网站,没什么内容,页面简单,根本没流量,由于没时间,也就一直没管网站,08 年到了,我有充足的时间泡在网上,开始关心起我的站来,抓紧时间把网站整理了一番,做了些自助链,到其他论坛发了点垃圾贴推广,呵呵,不见成效,天天徘徊在几十个ip,真是苦恼,元宵之夜,一个人无聊,预备上通宵网,无意在网上发现&艳照门&在网上相当火,之前我还没听说这事,跟不上潮流,没办法~~,在网上搜索了一把,在百度贴吧好不轻易找到了几张相关图片,呵呵,马上贴到我的论坛上。
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Leifeng Pagoda was first built in Northern Song Dynasty 977 AD, two years of peace and rejuvenating the country, originally for the King of Wu and Yue Feng Qian-shu Tibetan Buddhism as a relic to pray for peace and prosperity Luo Ji-fat built, the original name of Princess tower, tower of brick-wood structure leifeng well-known high tower, and Chinese folk legend of White Snake widespread myth is closely related to the story in the embodiment of white snake Bai Suzhen have been a result of the pursuit of true feelings and sea monk imprisoned in Leifeng Pagoda, the Leifeng Pagoda and therefore the statement of history far and wide Leifeng Pagoda on the fire hit twice, the first declared in the Northern Song Dynasty and years, because of Fang La uprising, a torch outside the wooden structure burned to the tower to the Southern Song Dynasty years, have been rebuilt Leifeng Pagoda, West Lake, one of Dusk is the leifeng circulated Leifeng Pagoda at that time subjected to fire the second Jiajing in the Ming Dynasty, when the pirates violation of Hangzhou, Leifeng Pagoda burnt again, remaining tower stands on the shore of West Lake, this case continued until the end of the Qing, Leifeng Pagoda finally collapsed due to overwhelming cause of the collapse on the Leifeng Pagoda in history is also very controversial, in general there are two versions of the previous two years in the clean-up sites Leifeng Pagoda time, found that a considerable portion of the tower of brick side of a small hole in the cave there are Buddhist in the past, people have incorrectly relay erroneous messages will pass into a gold brick by brick, the tower blocks have take-home, resulting in the collapse of the tower argument argument, one of the two, due south is the land of plenty since ancient times, but Hangzhou is the House of silk and tea, the history of Hangzhou on the rich silk, and every year when the silkworms cocoon silk, a variety of reasons, tend to have a large number of cocoon death, Over the past superstition, misconception that cocoon cursed, while the Leifeng Pagoda is a town of white snake demon, thinking that would be the Pagoda bricks at home, they can withstand the erosion of Yao Xie, you have to take a sericulture, his family wealth take a course of time, in particular, Taki shaft damage due to the common people, coupled with those in power are indifferent Leifeng Pagoda finally at 13:40 on September 25, 1924 came crashing down
雷峰塔初建于北宋太平兴国二年公元977年,原本为吴越国王钱淑为奉藏佛螺髻发舍利子以祈祷国泰民安所建,原名叫皇妃塔,塔为砖木结构雷峰塔的知名度之高,与中国民间广泛流传的神话传说白蛇传密切相关,故事中白蛇的化身白素贞因追求人间真情而被法海和尚囚禁于雷峰塔下,雷峰塔因而声明远播历史上的雷峰塔曾两次遭遇大火,第一次是在北宋宣和年间,因方腊起义,一把火把外面的木结构塔身加以焚毁到了南宋年间,曾重修雷峰塔,西湖十景之一的雷峰夕照就是在那个时候流传的雷峰塔第二次遭受火烧是在明朝的嘉靖年间,当时倭寇侵犯杭州,雷峰塔再次把火焚,仅剩塔身屹立于西湖之滨这种情形一直持续到清末民初,雷峰塔终因不堪重负而倒塌了关于雷峰塔倒塌的原因,历史上也很有争论,一般来讲有两种说法,前两年在清理雷峰塔遗址的时候,发现有相当一部分的塔砖一侧有一个小洞,在洞里有佛经而在过去,老百姓们以讹传讹将经砖传成金砖,纷纷将塔砖拿回家,从而导致塔的倒塌此说法之一说法之二,由于江南自古就是鱼米之乡,而杭州又是丝茶之府,历史上的杭州就盛产丝绸,而每年蚕宝宝吐丝结茧之时由于多种原因,往往有大量的蚕茧死亡,过去的人迷信,误以为蚕茧中了邪,而雷峰塔是镇妖的白蛇,以为将雷峰塔的砖放在家里,就可以抵挡妖邪的侵蚀,你家养蚕拿一块,他家求财拿一块,久而久之,塔身特别是塔基由于老百姓的破坏,加上当权者的漠不关心,雷峰塔终于在1924年9月25日下午1点40分轰然倒塌
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It was found that electrical field strength and potential around the the sample changed less in the fully insulated chamber than in conducting material phytotron, so it is closer the real condition. Based on the design, the first fully insulated large artificial climate chamber in China, in which temperature , humidity, and atmospheric pressure can be regulated, has been built in our laboratory. The paper developed an insulation parameters automatic test system of high voltage capacitive equipment based on LabVIEW. In the chamber, On-line tanδmeasurements of the capacitive transformer bushings were completed. The effects of environmental factors on tanδwere analyzed, and the curves between the tanδand the environment parameters were acquired. Then, a grey relational model to analyze the effects of main environmental factors on tanδwas built, and the grey relational grade between them was gained in this paper.
完成的主要工作和取得的主要研究成果如下:提出了全绝缘型人工气候室设计方案,计算分析了气候室内悬挂绝缘子和套管时的空间电场分布情况,并和金属材质气候室相比较,论证了该方案的优越性,据此方案研制的全绝缘人工气候室可调节温度、湿度和压力等参数,满足了人工气候试验的要求;开发了基于虚拟仪器技术的高压电容型设备绝缘特性自动测试系统,完成了人工气候室内变压器套管tanδ的在线测量试验,以此为基础分析了环境因素对电容型设备tanδ的影响情况,获得了tanδ与环境参数的关系曲线,建立了环境因素对tanδ影响的灰关联分析模型,得到了主要环境参数与电容型设备tanδ的灰关联度。
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I'm wishing on a star And trying to believe That even though it's far He'll find me at Christmas Eve I guess Santa is busy Cause he never comes around I think of him when Christmas comes to town The best time of the year When everyone comes home With all this Christmas tear It's hard to be alone Putting up the Christmas tree With friends you come around It's so much fun when Christmas comes to town Presents for the children wrapped in red and green All the things I've heard about, but never really see No one will be sleeping on the night of Christmas Eve Hoping Santa's on his way Presents for the children wrapped in red and green All the things I've heard about, but never really see No one will be sleeping on the night of Christmas Eve Hoping Santa's on his way When Santa's sleigh bells ring I listen all around The herald angels sing I never hear a sound And all the dreams of children Once lies will all be found That's all I want when Christmas comes to town That's all I want when Christmas comes to town
我正在一颗星上希望并且努力相信那即使它很远他将在圣诞前夕找到我我猜测圣诞老人忙引起,他从未来这里当圣诞节来镇时,我想起他这一年的最佳时间当每人回家时由于全部这滴圣诞节眼泪是独自一人的是难的提出圣诞树由于朋友你来这里当圣诞节来镇时,是那么多有趣为红和绿色用提出包裹的那些孩子我听说过,但是从未真的看见的全部事情没有人将在圣诞前夕的夜晚睡在他的方式上希望圣诞老人为红和绿色用提出包裹的那些孩子我听说过,但是从未真的看见的全部事情没有人将在圣诞前夕的夜晚睡在他的方式上希望圣诞老人当圣诞老人的雪橇铃响时我到处听使者天使唱歌我从未听到一个声音以及孩子的全部梦躺全部将发现当圣诞节来镇时,那是我想要的全部当圣诞节来镇时,那是我想要的全部
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The silica surfaces polished with ion beam of 400ev energy and 100mA density in 35°incident angle for 2hrs was found to have a roughness less than 0.5nm . The SFM was also used to measure the surfaces to be bonded by SAB method and the deformations of the surfaces during contact each other. The micro roughness of the surfaces was found to produce great effect on the SAB strength. The rougher the surfaces are, the weaker the bonding forms.
本文首先将原子力显微镜应用于一种新的超光滑表面离子束抛光的工艺研究,搞清了表面纳米级微观形貌与离子束抛光参数之间的关系,在离子能量为400V、束流密度为100mA和入射角为40°时,经过两个小时以上的抛光,硅(111)表面微观形貌在1μm×1μm的范围内从抛光前的5nm下降到0.4nm。
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Columbus thereafter ventured out across the Caribbean Sea. He found the Lesser Antilles, explored the coast of Cuba, discovered Jamaica, and finally returned to Spain in 1496. On a thrid voyage in 1498 Columbus found Trinidad and explored the northern coast of South American.
此后哥伦布冒险横渡加乐比海,他发现了小安的列斯群岛,探寻了古巴海岸线,还发现了牙卖加,最后于1496年回到西班牙。1498年哥伦布第三次出航,发现了特立尼达,探访了南美的北部海岸线。
- 相关中文对照歌词
- I Found Jesus On The Jailhouse Floor
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力