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Dry modification of electrode materials by roller vibration milling at room temperature

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Particuology 2008年第5期6卷 383-388页

作者： Shengjuan Li shulin wang Bo Xu Department of Power Engineering University of Shanghai for Science and Technology 516 Jungong Road Shanghai 200093 China

For the first time dry roller vibration milling at room temperature was used to prepare active carbon （AC） nano-particles and to modify MnO2 powder as electrode materials. In 30 min AC was milled to a mean particle size of 30-50 nm with increased crystallinity and higher specific surface area, predominantly mesoporous and with improved pore diameter distribution. Then, AC nano-particles were incorporated with MnO2 or bismuth-doped MnO2 nano-particles synthesized by sol-gel methods to prepare nano-composite electrode materials for studying their electrochemical performance. The AC nano-particles combined with 10 wt.% bismuth-doped MnO2 nano-particles were found to possess excellent electrochemical property with specific capacitance up to 308 F/g and without obvious attenuation with increasing current. Our method seems to ooen a new way to imorove AC based electrode materials used for clean energy such as suner capacitors.

关键词： Active carbon Roller vibration milling Electrode materials Nano-materials Super-capacitors

Impact chaos control and stress release——A key for development of ultra fine vibration milling

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Progress in Natural Science:Materials International 2002年第5期12卷 18-23页

作者： wang shulin(Department of Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China) Shanghai Univ Sci & Technol Dept Power Engn Shanghai 200093 Peoples R China

Through our previous experimental and analytical studies, it has been discovered that the key for the development of vibration milling is the impact chaos control and stress release. The necessities for the chaos control and stress release are: (i) to strictly e-liminate the sub-harmonics; (ii) to control the super-harmonics to a lower level and (iii) to load the system compressively with relatively higher period, in order that the vibration energy can be absorbed by the particles effectively and sufficiently. A new vibration model for ultra fine milling is proposed, which has wide applications in preparing ultra fine particles.

关键词： vibration mills ultra fine milling impact chaos control stress release.

THE BEHAVIOR OF H AT THE AMORPHOUS SEMICONDUCTOR MULTILAYER INTERFACES

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Chinese Physics Letters 1988年第2期5卷 49-52页

作者： wang shulin CHENG Ruguang Shanghai Institute of Ceramics Academia Sinica

The H evolution spectra of a-Si:H/a-SiN_(x):H and a-Si:H/a-Si:H multilayers are *** is found that interface H evolution occurs at a higher temperature,which suggests that the interface-bonded H state is different from... 详细信息

关键词： interface evolution MULTI

Restructuring Tilth Layers Can Change the Microbial Community Structure and Affect the Occurrence of Verticillium Wilt in Cotton Field

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Phyton-International Journal of Experimental Botany 2023年第10期92卷 2841-2860页

作者： Ming Dong Yan wang shulin wang Guoyi Feng Qian Zhang Yongzeng Lin Qinglong Liang Yongqiang wang Hong Qi Institute of Cotton Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid AreaMinistry of AgricultureNational Cotton Improvement Center Hebei BranchShijiazhuang050051China

Restructuring tilth layers(RTL)is a tillage method that exchanges the 0–20 and 20–40 cm soil layers that can be applied during cotton cultivation to increase cotton yield,eliminate weeds and alleviate severe disease,including Verticillium ***,the mechanism by which RTL inhibits Verticillium wilt is ***,we investigated the distribution of microbial communities after rotary tillage(CK)and RTL treatments to identify the reasons for the reduction of Verticillium wilt in cotton fields subjected to *** high-throughput sequencing was used to sequence the bacterial and fungal *** disease incidence and severity of Verticillium wilt decreased by 28.57%and 42.64%,respectively,after ***,RTL significantly enhanced bacterial richness and evenness at 20–40 cm and-reduced the differences in fungal evenness and richness between soil depths of 0–20 and 20–40 *** number of Verticillium dahliae decreased,while the relative abundance of biocontrol bacteria such as Bacillus and Pseudoxanthomonas increased significantly following *** RTL improved bacterial diversity,decreased the number of Verticillium dahliae and increased the relative abundance of biocontrol bacteria,which may have suppressed the occurrence of Verticillium wilt in cotton fields.

关键词： Bacteria fungi restructuring tilth layers diversity disease reduction

Research on Mechanisms of Steam Breakthrough and Profile Control Design for Steam Soaking Well

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Petroleum Science 2006年第3期3卷 51-55页

作者： Liu Huiqing Zhang Hongling wang shulin wang Han Bao Shucheng Faculty of Petroleum Engineering China University of Petroleum Beijing 102249 China Henan Oilfield Company SINOPEC Nanyang Henan 473400 China

Scaled physical model tests for steam breakthrough were conducted based on the analysis of mechanisms and influence factors of steam breakthrough. Physical simulation results showed that at the initial steam breakthrough, preferential flow channels were formed in narrow sand packs and most residual oil left in these channels was immobile. This shortened the steam breakthrough time of follow-up steam flooding and decreased the increment of oil recovery efficiency. Steam breakthrough occurred easily for a smaller producer-injector spacing, and a bigger difference in physical properties between fluids and rock. Steam breakthrough is more likely to occur at a larger formation permeability （k）, greater steam displacement velocity （u） and smaller producer-injector spacing （L）. Steam breakthrough time is a function of the parameter group （uk/L）, i.e. tb=3.2151 （uk/L）^-0.5142. A non piston-like displacement model was built based on steam breakthrough observation for a steam stimulated well in the Jinglou Oilfield, Henan Oilfield Company. The steam volume swept in different directions could be obtained from inter-well permeability capacity and breakthrough angle, and the steam swept pore volume （SSPV） was also determined. Numerical simulation showed that steam sweep efficiency reached its peak value when a slug of profile control agent （slug size 10%-15% SSPV） was set at one half of the inter-well spacing. Field test with 12.5% SSPV of profile control agents in the Jinglou Oilfield achieved success in sealing breakthrough channels and good production performance of adjacent producers.

关键词： Heavy oil steam breakthrough scaled physical model profile control optimization design

Nanostructural evolution of Zn by dry roller vibration milling at room temperature

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Progress in Natural Science:Materials International 2006年第4期16卷 441-444页

作者： wang shulin, LI Shengjuan, DU Yanchen, XU Bo, LI Laiqiang and ZHU Yan Department of Power Engineering Department of Medical Apparatus, University of Shanghai for Science and Technology, Shanghai 200093, China Department of Power Engineering University of Shanghai for Science and Technology Shanghai 200093 China Department of Medical Apparatus University of Shanghai for Science and Technology Shanghai 200093 China

It remains open to date to produce stable nanostructures of single element by dry mechanical method at room temperature on a large scale. Here we report nanostructural evolution of zinc by dry roller vibration milling at room temperature, which leads to structurally near perfect zinc flakes sized 3-5 nm in diameter. The synthesized nanostructures are single crystalline, transparent, uniform, randomly oriented, almost equiaxed, and mostly free from defects. The evolution seems to open a way to optimize zinc nanostructures by the mechanical method, offer valuable references to prepare nanostructures of other metals optimally, and shed light on how to lower the size limit by mechanical milling. Single elemental metal nanostructures with excellent properties give rise to new opportunities in scientific research and development of nanotechnology.

关键词： nanoparticles nanostructures vibration milling.

Observing the collapse of super-Bloch oscillations in strong-driving photonic temporal lattices

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Advanced Photonics 2024年第4期6卷 14-24页

作者： Xinyuan Hu shulin wang Chengzhi Qin Chenyu Liu Lange Zhao Yinglan Li Han Ye Weiwei Liu Stefano Longhi Peixiang Lu Bing wang Huazhong University of Science and Technology School of PhysicsWuhan National Laboratory for OptoelectronicsWuhanChina Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern RecognitionWuhanChina Politecnico di Milano Dipartimento di FisicaMilanoItaly IFISC(UIB-CSIC) Instituto de Fisica Interdisciplinary Sistemas ComplejosPalma de MallorcaSpain

Super-Bloch oscillations(SBOs)are amplified versions of direct current(dc)-driving Bloch oscillations realized under the detuned dc-and alternating current(ac)-driving electric fields.A unique feature of SBOs is the coherent oscillation inhibition via the ac-driving renormalization effect,which is dubbed as the collapse of ***,previous experimental studies on SBOs have only been limited to the weak ac-driving regime,and the collapse of SBOs has not been ***,by harnessing a synthetic temporal lattice in fiber-loop systems,we push the ac-field into a strong-driving regime and observe the collapse of SBOs,which manifests as the oscillation-trajectory localization at specific ac-driving amplitudes and oscillation-direction flip by crossing collapse *** adopting arbitrary-wave ac-driving fields,we also realize generalized SBOs with engineered collapse ***,we exploit the oscillation-direction flip features to design tunable temporal beam routers and *** initiate and demonstrate the collapse of SBOs,which may feature applications in coherent wave localization control for optical communications and signal processing.

关键词： super-Bloch oscillations band collapse ac-driving renormalization effect photonic temporal lattices strong-driving regime

Reductive Coupling of Tertiary Alkyl Halides with Other Electrophiles

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Reductive Coupling of Tertiary Alkyl Halides with Other Elec...

中国化学会第九届全国有机化学学术会议

作者： Xuan wang Chenglong Zhao shulin wang Hegui Gong Shanghai University

＜正＞Reductive coupling between two different electrophiles particularly alkyl electrophiles has received tremendous attentions in the very recent ***-catalyzed reductive cross-coupling of alkyl halides with other electrophiles such as alkyl and aryl halides,allylic carbonates and acid derivatives have been successfully *** reactions provide facile protocols to the construction C-C bonds,featuring excellent functional

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两宋时期屋木画所见建筑地域性

南京艺术学院学报（美术与设计） 2021年第4期 23-29页

作者：王书林北京大学中国考古学研究中心北京100871

基于对木构建筑地域性的认识,以北宋《闸口盘车图》《瑞鹤图》和南宋《中兴瑞应图》《四景山水图》《水殿招凉图》等作品为例,审视两宋时期的屋木画作品,发现其对于南北建筑形制的地域性差异有着非常精准的表现。屋木画的地域性研究将... 详细信息

基于对木构建筑地域性的认识,以北宋《闸口盘车图》《瑞鹤图》和南宋《中兴瑞应图》《四景山水图》《水殿招凉图》等作品为例,审视两宋时期的屋木画作品,发现其对于南北建筑形制的地域性差异有着非常精准的表现。屋木画的地域性研究将拓展绘画作品的观察维度,为绘画作者、作品内容以及绘制时代提供新的线索。

关键词：两宋时期屋木画建筑地域性