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Effects of High-Power Ultrasonic Treatment on the Slurryability of Coals 被引量:2
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作者 CUI Guang-wen ZHU Shu-quan +1 位作者 ZOU Li-zhuang XIE Wei-wei 《Journal of China University of Mining and Technology》 EI 2007年第4期562-565,共4页
To improve slurryability,high power ultrasonic energy was used to treat coal slurry. The influence of power on the slurryability of raw coals and on the maximum hydro-content (MHC) was investigated by measuring the ap... To improve slurryability,high power ultrasonic energy was used to treat coal slurry. The influence of power on the slurryability of raw coals and on the maximum hydro-content (MHC) was investigated by measuring the apparent viscosity before and after treatment. The experimental results show that the effect of treatment on sluryability is different for different rank coals under the same treatment conditions. The coals metamorphosed to lower degree are more sensitive to the ultrasonic treatment. The apparent viscosity of slurries from coal metamorphosed to medium degree clearly decreases after the ultrasonic treatment. The ultrasonic treatment makes MHC decrease,which improves the slurryability. For Shenmu or Hebi coal slurry after 3 min. treatment the maximum fixed-viscosity concentration is increased by about 0.4% and 0.3%,respectively,when the ultrasonic power is 100 W. The maximum fixed-viscosity concentration increased 2.4% and 1.7%,respectively,when the ultrasonic power was 300 W,but it decreased by about 0.4% and 0.7%,respectively,when the power was 500 W. 展开更多
关键词 water slurry SLURRYABILITY ultrasonic wave VISCOSITY
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Effects from changes in pulp nature after ultrasonic conditioning on high-sulfur coal flotation 被引量:7
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作者 KANG Wen-ze XUN Hai-xin +1 位作者 KONG Xiao-hong LI Ming-ming 《Mining Science and Technology》 EI CAS 2009年第4期498-502,507,共6页
A study of the effects of the pulp nature on desulphurization and de-ashing during high-sulfur coal flotation is described in this paper. Highlighted are the use of a solution oxygen gauge, a pH value gauge and a surf... A study of the effects of the pulp nature on desulphurization and de-ashing during high-sulfur coal flotation is described in this paper. Highlighted are the use of a solution oxygen gauge, a pH value gauge and a surface tension gauge to investigate changes in the pulp nature related to changes in the oxygen content, the pH value and the interfacial tension. The temperature be- fore and after ultrasonic conditioning was also investigated. The results showed that ultrasonic conditioning resulted in a decrease in the oxygen content and the interracial tension and an increase in the pH value and the temperature of the pulp. The perfect index of flotation and the perfect index of desulphurization of fine coal increased by 25.19% and 18.03%, respectively, after the pulp was ultrasonically conditioned. This study shows that ultrasonic conditioning can change the pulp nature and enhance the degree of desulphurization during high-sulfur coal flotation. 展开更多
关键词 ultrasonic treatment PULP perfect index of flotation perfect index of desulphurization
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Study on Interface mechanical behavior of steel tube reinforced concrete composite pile
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作者 ZHAO Jiehao 《International English Education Research》 2016年第4期93-94,共2页
Currently for the steel tube reinforced concrete composite pile research, although predecessors make a comprehensive research on the composite pile beating performance, design technology, but there are still many prob... Currently for the steel tube reinforced concrete composite pile research, although predecessors make a comprehensive research on the composite pile beating performance, design technology, but there are still many problems have not been solved, such as the steel tube reinforced concrete pile composite interracial force learn performance research is still in the initial stage. In this paper, we mainly discuss the research methods of several interface mechanical properties and propose the possibility of studying the mechanical properties of the steel tube reinforced concrete composite pile by using the principle of ultrasonic speckle. 展开更多
关键词 Steel tube reinforced concrete composite pile Interface mechanical properties research methods
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Experimental study on ultrasonic propagation in water-based bentonite slurry
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作者 LAN Kai YAN Taining 《Global Geology》 2009年第3期174-178,共5页
Drilling fluid is a common flushing medium used in pile foundation, geological drilling and petroleum drilling. Study on ultrasonic propagation properties in drilling fluid is of vital importance, not only for develop... Drilling fluid is a common flushing medium used in pile foundation, geological drilling and petroleum drilling. Study on ultrasonic propagation properties in drilling fluid is of vital importance, not only for developing equipments to non-contact measuring concrete casting level for bored pile, but also for developing equip- ments considering drilling fluid as signal channel. The existence of clay particles makes the ultrasonic propagation and attenuation in drilling fluid much different from pure water. In order to know the relation among ultrasound frequency, slun-y density and depth, a series of laboratory experiments about ultrasound propagation in water-based bentonite slurry were finished. Wavelet method was adopted to process the gained original waves of ultrasonic propagation in slurry, so we knew the velocity and attenuation coefficient of ultrasound propagated in different drilling fluids with different density. The first group experiments shows that with density of drilling fluid increase, ultrasonic velocity will decrease but attenuation coefficient will increase if ultrasonic frequency keep constant. The second group experiments shows that the power of ultrasound will intensify in small bore hole, the attenuation coefficient is much smaller than theoretical value. 展开更多
关键词 ULTRASOUND drilling fluid propagation properties ultrasound velocity ultrasonic attenuation
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鲁迅的两篇《命运》和三篇《关于翻译》
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作者 王永生 《上海鲁迅研究》 1990年第1期81-85,共5页
(一)不同的作者可能根据类似的题材写出同名的作品。有的是出于无意的巧合,所谓'撞了车',有的却是有意为之,甚至有事先相约以同题作文的情况。远的不说,1923年8月朱自清和俞平伯同游南京秦淮河,分别写出了《浆声灯影里的秦淮河... (一)不同的作者可能根据类似的题材写出同名的作品。有的是出于无意的巧合,所谓'撞了车',有的却是有意为之,甚至有事先相约以同题作文的情况。远的不说,1923年8月朱自清和俞平伯同游南京秦淮河,分别写出了《浆声灯影里的秦淮河》,相异成趣,以各自的艺术特色,在中国现代文学史上留下了人们所熟知的事例。可是,同一位作家也可能写出同名的作品。这种情况往往容易被人们忽视。不仅粗心的一般读者会疏于深究,连一些对作家生平与创作进行过专门研究者也可能对此轻轻放过。 展开更多
关键词 作家 浆声 创作 情况 同题 同名 秦淮河 作品
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Large-area gold nanohole arrays fabricated by one-step method for surface plasmon resonance biochemical sensing
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作者 Huijie Qi Lihong Niu +7 位作者 Jie Zhang Jian Chen Shujie Wang Jingjing Yang Siyi Guo Tom Lawson Bingyang Shi Chunpeng Song 《Science China(Life Sciences)》 SCIE CAS CSCD 2018年第4期476-482,共7页
Surface plasmon resonance(SPR) nanosensors based on metallic nanohole arrays have been widely reported to detect binding interactions in biological specimens. A simple and effective method for constructing nanoscale a... Surface plasmon resonance(SPR) nanosensors based on metallic nanohole arrays have been widely reported to detect binding interactions in biological specimens. A simple and effective method for constructing nanoscale arrays is essential for the development of SPR nanosensors. In this work, we report a one-step method to fabricate nanohole arrays by thermal nanoimprinting in the matrix of IPS(Intermediate Polymer Stamp). No additional etching process or supporting substrate is required. The preparation process is simple, time-saving and compatible for roll-to-roll process, potentially allowing mass production. Moreover, the nanohole arrays were integrated into detection platform as SPR sensors to investigate different types of biological binding interactions. The results demonstrate that our one-step method can be used to efficiently fabricate large-area and uniform nanohole arrays for biochemical sensing. 展开更多
关键词 gold nanohole arrays one-step method NANOIMPRINTING NANOSENSOR biomolccular binding
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车身涂装工艺
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《中国涂装》 2004年第3期23-25,共3页
当汽车组装完成后,能让车身看起来闪闪发亮的上色技巧最能左右成品质感,不管汽车尺寸是大是小,只要车子涂装后能绽放独特光辉,这样的魅力即使不懂车的人也会为之吸引。相反的,就算汽车内部构造再怎么精彩,没有漂亮色泽而表面粗糙... 当汽车组装完成后,能让车身看起来闪闪发亮的上色技巧最能左右成品质感,不管汽车尺寸是大是小,只要车子涂装后能绽放独特光辉,这样的魅力即使不懂车的人也会为之吸引。相反的,就算汽车内部构造再怎么精彩,没有漂亮色泽而表面粗糙的话,原有魅力也会大打折扣。本文用通俗易懂的语言将车身涂装比喻作女士的化妆,生动地向读者介绍了车身涂装的步骤及作用。 展开更多
关键词 车身 涂装工艺 上色 步骤 表面处理 涂底漆 密封胶 绝热 涂中间漆 刮腻子
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Cylindrical Three-Dimensional Dust-Ion Acoustic Propagation in Plasmas
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作者 S.K.El-Labany E.K.El-Shewy +1 位作者 H.N.Abd El-Razek A.A.El-Rahman 《Communications in Theoretical Physics》 SCIE CAS CSCD 2018年第9期325-330,共6页
Wave properties of solitons in an unmagnetized four-component dusty plasma system contains isothermal distributed electrons, mobile ions, and negative-positive dusty grains have been examined. To study DIA wave proper... Wave properties of solitons in an unmagnetized four-component dusty plasma system contains isothermal distributed electrons, mobile ions, and negative-positive dusty grains have been examined. To study DIA wave properties,a reductive perturbation (RP) analysis is used. By a reductive perturbation (RP) analysis under convenient coordinate transformation, the three dimension Kadomtsev-Petviashvili equation in cylindrical coordinates is obtained. The effects of dust grain charge on soliton pulse structures are studied. More specifically, solitary profile depending on the axial,radial, and polar angle coordinates with time is discussed. This investigation may be viable in plasmas of the Earth’s mesosphere. 展开更多
关键词 dust plasmas 3D-CKP equation dusty-ion acoustic solitary waves isothermal electrons
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