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Accelerating column leaching trial on copper sulfide ore

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Rare Metals 2008年第1期27卷 95-100页

作者： WANG Hongjiang wu Aixiang zhou Xun WANG Shaoyong ZHANG Jie Civil and Environment Engineering School University of Science and Technology Beifing Beifing 100083 China School of Resource and Safety Engineering Central South University Changsha 410083 China

The main measures to accelerate leaching sulfide ore are large spraying intensity,manual oxygen supply,temperature control,and acclimated *** indoor experiment accelerating sulfide ore leaching detected the temperature during leaching process,dissolvability of oxygen,bacterial concentration,Cu concentration and slag *** the same time,this paper also analyzed the effect of four factors,which are bacterial diversity cultivation stage,spraying intensity,air supply,and whether to control temperature,on the leaching efficiency of *** results indicate that the oxygen content of leach solution has a close relationship with temperature but it is rarely affected by air *** bacterial concentration preserves from 106 to 107 mL^-1,and temperature has a great effect on the bacterial activity under the condition of proper temperature and oxygen supply,and the lack of nutrition prevents the bacterial concentration from rising in the late *** relationships of the copper leaching efficiency to temperature,air feed,and spraying intensity are directly *** leaching efficiencies of the cultivated bacteria and acclimation bacteria are 1.2 and 1.4 times as large as that of the original bacteria.

关键词： accelerating leaching spraying intensity manual air supply temperature control bacterial cultivation

Selective linear etching of monolayer black phosphorus using electron beams

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Chinese Physics B 2020年第8期29卷 400-406页

作者： Yuhao Pan Bao Lei Jingsi Qiao Zhixin Hu wu zhou Wei Ji Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Renmin University of ChinaBeijing 100872China School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Center for Joint Quantum Studies and Department of Physics Institute of ScienceTianjin UniversityTianjin 300350China

Point and line defects are of vital importance to the physical and chemical properties of certain two-dimensional(2D)*** electron beams have been demonstrated to be capable of creating single-and multi-atom defects in 2D materials,the products are often random and difficult to predict without theoretical *** this study,the thermal motion of atoms and electron incident angle were additionally considered to study the vacancy evolution in a black phosphorus(BP)monolayer by using an improved first-principles molecular dynamics *** P atoms in monolayer BP tend to be struck away one by one under an electron beam within the displacement threshold energy range of 8.55-8.79 eV,which ultimately induces the formation of a zigzag-like chain *** chain vacancy is a thermodynamically metastable state and is difficult to obtain by conventional synthesis methods because the vacancy formation energy of 0.79 eV/edge atom is higher than the typical energy in monolayer ***-like quasi-bonds and a charge density wave are formed along the chain vacancy,exhibiting rich electronic *** work proposes a theoretical protocol for simulating a complete elastic collision process of electron beams with 2D layers and will facilitate the establishment of detailed theoretical guidelines for experiments on 2D material etching using focused high-energy electron beams.

关键词： electronic beam radiation simulation black phosphorus chain vacancy

Bladder Paraganglioma with a Calculus:A Case Report

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Chinese Journal of Clinical Oncology 2007年第3期4卷 223-225页

作者： Jian Wang Hong wu zhou wu Jianjun Liu Department of Urology Affiliated Hospita of Guangdong Medical College Zhanjiang Guangdong 524001 China.

A 61-year-old female visited our department reporting intermittent microscopic hematuria. She had slight hypertension of 141/78 mmHg, but there was no family history of hypertension. Computed tomography （CT） of the abdomen showed an isointense lesion within the posterior wall of the urinary bladder with a calculus on the surface （Fig.1）.

关键词： bladder paraganglioma calculus

Membrane Phospholipid Redistribution in Cytokinesis:A Theoretical Model

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Acta Biochimica et Biophysica Sinica 2005年第9期37卷 643-648页

作者： Mei-Wen AN Wen-zhou wu Wei-Yi CHEN Institute of Applied Mechanics,Taiyuan University of Technology,Taiyuan 030024,China Institute of Applied Mechanics Taiyuan University of TechnologyTaiyuan 030024 China

In cell mitosis,cytokinesis is a major deformation process,during which the site of thecontractile ring is determined by the biochemical stimulus from asters of the mitotic apparatus,actin andmyosin assembly is related to the motion of membrane phospholipids,and local distribution and arrangementof the microfilament cytoskeleton are different at different cytokinesis *** on the Zinemanas-Nirmodel,a new model is proposed in this study to simulate the entire process by coupling the biochemicalstimulus with the mechanical *** were three assumptions in this model:the movements ofphospholipid proteins are driven by gradients of biochemical stimulus on the membrane surface;the localassembly of actin and myosin filament depends on the amount of phospholipid proteins at the same location;and the surface tension includes membrane tensions due to both the passive deformation of the membraneand the active contraction of actin filament,which is determined by microfilament redistribution *** model could explain the dynamic movement of microfilaments during cytokinesis andpredict cell *** calculated results from this model demonstrated that the reorientation ofphospholipid proteins and the redistribution and reorientation of microfilaments may play a crucial role in *** model may better represent the cytokinesis process by the introduction of biochemical stimulus.

关键词： cytokinesis biochemical stimulus phospholipid actomyosin microfilament

Thermodynamic Properties of Fe-C-N and Fe-C-B-N Melts

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Journal of Iron and Steel Research International 2007年第1期14卷 21-24页

作者： CHEN Er-bac WANG Shi-jun DONG Yuan-chi wu Bao-guo zhou Yun School of Metallurgy and Materials Anhui University of Technology Ma＇anshan 243002 Anhui China

The saturated solubility of carbon and nitrogen in Fe-C-N and Fe-C-B-N melts was measured experimentally at 1 485℃ to obtain the activity interaction coefficients between components in these melts. A new method was used to treat experimental results. Using thermodynamic derivation and calculation, some important interac- tion coefficients between components in these melts were obtained.

关键词： Fe-C-N melt Fe-C-B-N melt Fe-C-B melt interaction coefficient thermodynamic property

Synthesis of a New Family of Green Light Emitting Material Containing Both Hole and Electron Transporting Units

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Chinese Chemical Letters 2002年第10期13卷 949-952页

作者： Hai Tao YU Wan Xuan ZHANG wu Xin zhou Teruo MASTUURA Ji Ben MENG Department of Chemistry Nankai UniversityTianjin 300071 Emeritus Professor of Kyoto University Kyoto 615-8195Japan

Two new molecules containing oxadiazoles and triphenylamine-stilbene moiety were synthesized. Their luminescent properties were determined, which indicated that they had strong green fluorescent properties. All the tw... 详细信息

关键词： Synthesis green organic electroluminescence materials fluorescence triphenylamine oxadiazole.

Obtaining accurate measurements of the sea surface height from a GPS buoy

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Acta Oceanologica Sinica 2023年第6期42卷 78-88页

作者： Wanlin Zhai Jianhua Zhu Chuntao Chen wu zhou Longhao Yan Yufei Zhang Xiaoqi Huang Kai Guo National Ocean Technology Center Tianjin 300112China School of Ocean Yantai UniversityYantai 266004China National Satellite Ocean Application Service Beijing 100081China

A dedicated GPS buoy is designed for calibration and validation(Cal/Val)of satellite altimeters since *** order to evaluate the accuracy of the sea surface height(SSH)measured by the GPS buoy,twelve campaigns have been done within China sea area between 2014 and *** six of these campaigns,two static Global Navigation Satellite System stations were installed at distances of<1 km and 19 km from the buoy to assess how the baseline length influenced the derived SSH from the buoy *** GPS buoy data was processed using the GAMIT/GLOBK software+TRACK module and CSRS-PPP tool to achieve the *** SSH was compared with conventionally tide gauge(TG)data to evaluate the accuracy of the buoy with the standard deviation of the height *** results showed that the difference in the standard deviation of the SSH from the buoy and the TG was less than 16 *** SSHs processed with different ephemeris(Ultra-Rapid,Rapid,Final)were not significantly *** the baseline length was 19 km,the SSH solution of the GPS buoy performed well,with standard bias of less than 26 mm between the heights measured by the buoy and TG,meaning that the buoy could be used for Cal/Val of *** bias between the Canadian Spatial Reference System-precise point positioning tool and the TRACK varied a lot,and some of them were over 130 *** deemed too high to be useful for Cal/Val of satellite ***,the GPS buoy solutions processed by GAMIT/GLOBK software+TRACK module were used for in-orbit Cal/Val of HY-2B/C satellites in ten *** SSH and significant wave height of the altimeters showed good agreements with the GPS buoy solutions.

关键词： GPS buoy sea surface height baseline length precise point positioning satellite altimeter HY-2

Species diversity and stability of natural secondary communities with different cutting intensities after ten years

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Journal of Forestry Research 2011年第2期22卷 205-208页

作者： wu Zhi-long zhou Xin-nian ZHENG Li-feng HU Xi-sheng zhou Cheng-jun Fujian Agriculture and Forestry University Fuzhou Fujian 350002China.

Species diversity and stability of natural secondary communities in different layers with different cutting intensities 10 years later were investigated by calculating Marglef Richness index（R）,Shannon-Wiener diversity index（H）,Simpson diversity index（P）,and Pielou Evenness index（J）.Results show that the values of R,H and P among different layers are listed in a decreasing order：the shrub layer the arbor layer the herb layer,all the three indices values reach the maximum under medium selective cutting intensity after 10 *** J value of the shrub layer shows a concave parabolic change with the increase in cutting intensity;it shows a linear increase for the arbor layer,whereas the J value of the herb layer shows an opposite change *** values of R at different cutting intensities had high significant difference,but other indices had not significant *** stability of communities at different cutting intensities after 10 years is non-cutting low selective cutting intensity medium selective cutting intensity high selective cutting intensity extra-high intensity clear *** stability of communities at different cutting intensities after 10 years shows that the greater cutting intensities,the worse the stability is.

关键词： community stability cutting intensity natural secondary forest species diversity

A new model analysis of the third harmonic voltage in inductive measurement for critical current density of superconducting films＊

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Chinese Physics B 2011年第2期20卷 471-477页

作者： Zhang Xu wu Zhi-Zhen zhou Tie-Ge He Ming Zhao Xin-Jie Yan Shao-Lin Fang Lan Department of Electronic Information Science and Technology College of Information Technical Science Nankai University Tianjin 300071 China

The critical current density Jc is one of the most important parameters of high temperature superconducting films in superconducting applications, such as superconducting filter and superconducting Josephson devices. This paper presents a new model to describe inhomogeneous current distribution throughout the thickness of superconducting films applying magnetic field by solving the differential equation derived from Maxwell equation and the second London equation. Using this model, it accurately calculates the inductive third-harmonic voltage when the film applying magnetic field with the inductive measurement for Jc. The theoretic curve is consistent with the experimental results about measuring superconducting film, especially when the third-harmonic voltage just exceeds zero. The Jc value of superconducting films determined by the inductive method is also compared with results raeasured by four-probe transport method. The agreements between inductive method and transport method are very good.

关键词： inhomogeneous current third-harmonic voltage critical current density magnetic field