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| 1 | Processes and mechanism of effects of sludge dredging on internal source release in lakes显示文摘Simulated research of internal loading and col- lecting and analyzing the samples from the lakes were carried out before and after dredging in polluted suburb lakes, Wuli Lake (Wuxi City) and Xuanwu Lake (Nanjing City). The research results showed that dredging can in- hibit internal loadings in a certain degree in a short term. The discrepancy of dredging effect and technical level, namely dredging quality, by different dredging methods will result in a difference of control of lake internal Ioad- ings. The internal Ioadings’ reversion will gradually ap- pear along with the bio-geochemical processes, including suspended particle precipi-tation, hydrodynamic distur- bance and microbio-transfor-mation. The reversion rate mainly depends on the dredging method and the change of interfacial processes on the new-born surface layer. The higher nutrient contents and organic matter in the sedi- ment will enhance water-sediment interfa-cial processes and nutrients regeneration. It is very impor-tant to study the physicochemicai and biological character of lacustrine sediments before dredging for determining the dredging methods and predicting their environmental ef- fect. | FANChengxin ZHANGLu WANGJianjun ZHENGChaohai GAOGuang WANGSumin | 2004 | Chinese Science Bulletin2004,49,17: | 20 |
| 2 | Analysis of High-temperature Boiler Tube Failure for T91 &T22显示文摘The tube failures took place frequently in the superheater of 2x600MW units in a power plant. According to the condition of tube failures, the mechanical property and microstructure on running and failed tubes were tested and evaluated. The chemical composition and structure phase of inner oxide scale and deposit inside of the tubes were examined.The fractured surfaces of failed tube samples were observed. And the material examination was performed for original tube steels SA213-T91 and SA213-T22. The results show that raw materials of SA213-T91 and SA213-T22 tube in superheater are qualified. Besides, the characteristics of the SA213-T91 and SA213-T22 tube failure are typical short-term overheated rupture. The rupture temperature is located between two phase Ac1 ~ Ac3 of the two steels. It is recognized that putting SA213-T22 tubes in operation under the condition of long-term over heating causes the rupture of SA213-T91 and SA213-T22. | SHUGuo-gang DINGHui ZHAOYan-fen XUEFei ZHAOLing-song ZHANGLu LIUJiang-nan WANGZheng-pin | 2004 | 材料热处理学报2004,25,5: | 5 |
| 3 | 北京猛禽两种旋尾类寄生线虫的报道(线虫纲,旋尾目)(英文)显示文摘报道寄生于北京猛禽的2种旋尾类线虫,其中一种为新种,另一种为中国新纪录种。作者分别对其做了光镜和电镜观察。北京副旋翼线虫,新种Paraspiralatus beijingensis sp.nov.采自于雕鸮的口腔和胃内,它与P. sakeri Gibbons,Nicholls &Bailey,2004的不同之处在于具有单个的肛前乳突,右交合刺远末端弯向背侧并稍微膨大而P. sakeri的交合刺远末端是直的,不膨大,呈钝尖形。纵纹腹小鸮无肛线虫Aprocta noctuae Spaul,1928采自红角鸮的体腔。本次所观察标本在形态上,如交合刺的长短和形状,尾乳突的数目和排列,阴门的位置,卵的大小等,都与前人对A. noctuae的描述一致。但是电子扫描电镜结果显示,A. noctuae的头端具有8个头乳突而不是4个,线虫角质层具有精细的横纹。A. noctuae为我国新纪录种。标本保存于河北师范大学生命科学学院。 | ZHANGShu—Qian LIU Bao-Chen ZHANGLu—Ping 张树乾 刘宝臣 张路平 | 2012 | 动物分类学报2012,37,3: | 1 |
| 4 | The Identification Mode of Corporation Types for Chinese MBO显示文摘 | Song Peng Zhanglu Tan | 2004 | China-USA Business Review2004,3,6: | 0 |
| 5 | Development of Silicon Multi-strip Detector显示文摘Position sensitive detector is very important for nuclear physics experiment. There several techniques can be used to fabricate position sensitive detector, for example, Si-surface barrier method, diffusion method, ion implantation and planar process etc. Among all the techniques mentioned above planar process is the best one. We have developed batch of position sensitive detector -- silicon multi-strip detector by using planar process. | TanJilian JinGenming WangHongwei YuanXiaohua DuanLiming LiSonglin LuZiwei XuHushan NingBaojun TianDayu WangWei ZhangLu | 2003 | 近代物理研究所和兰州重离子加速器实验室年报:英文版2003,,1: | 0 |
| 6 | An Analysis of DIfferences of Spoken English Test Styles: Non-response Tester vs Taperecorder显示文摘If we classify the spoken English test (SET) according to the time a candidate is scored, we will probably have three types——direct, indirect and semi-direct SET. Direct SET is a traditional test type in which the assessor scores the performance of the candidates when they are in the test. In an indirect test, the performance of candidates is videoed | ZhangLu | 2004 | 中国英语教学:英文版2004,27,3: | 0 |