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Accelerating leaching of copper ore with surfactant and the analysis of reaction kinetics

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International Journal of Minerals,Metallurgy and Materials 2019年第3期26卷 274-281页

作者： Chun-ming ai ping-ping Sun ai-xiang Wu Xun Chen Chao Liu College of Safety Science and Engineering Liaoning Technical University Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines University of Science and Technology Beijing Wanbao Mining Limited

To solve the problem of low permeability and lower extraction rates of high-mud ores, a surfactant was added as a penetrant to the pregnant leaching solution during column leaching tests. On the basis of the theories of physical chemistry and seepage flow mechanics, the mechanism by which seepage is enhanced under the effects of the surfactant was analyzed. The results show that the action modes of the surfactant were divided into four aspects: changing the wettability of the ore, reducing the viscosity of the leaching solution, adsorbing onto the surface of ore, and enhancing the permeability effect. The findings of column leaching tests demonstrated that permeability was substantially improved by the surfactant. In the later period of leaching, the permeability coefficient was two times higher than that of the control group. Meanwhile, the ore extraction rate increased by approximately 10%. During the leaching process, the surface tension of the solution did not substantially change, and that of the solution with surfactant increased slightly. The kinetics analysis of ore column leaching illustrated that the leaching processes were controlled by both internal diffusion(principal factor) and chemical reaction.

关键词： surfactant permeability reaction kinetics leaching

Standard Protocol Items for Clinical Trials with Traditional Chinese Medicine 2018: Recommendations, Explanation and Elaboration(SPIRIT-TCM Extension 2018)

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Chinese Journal of Integrative Medicine 2019年第1期25卷 71-79页

作者： Dai Liang CHENG Chung-wah TIAN Ran ZHONG Linda LD LI You-ping lyu ai-ping CHAN An-wen SHANG Hong-cai BIAN Zhao-xiang Hong Kong Chinese Medicine Clinical Study Centre School of Chinese Medicine Hong Kong Baptist University Institute of Digestive Diseases Longhua Hospital Shanghai University of Traditional Chinese Medicine Chinese Evidence-Based Medicine Centre Sichuan University Women's Col ege Research Institute Women's Col ege Hospital University of Toronto Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing Dongzhimen Hospital Beijing University of Chinese Medicine

Traditional Chinese Medicine(TCM) is one of the oldest systems of medicine. More and more attention has been paid to TCM application, but the variable quality of clinical trials with TCM impedes its widespread acceptance. The Standard Protocol Items: Recommendations for Interventional Trials(SPIRIT) 2013 Statement has established guidelines for designing clinical trials to ensure that the trial results are accurate and reliable. However, there are difficulties when applying SPIRIT 2013 Statement to trials with TCM, due to the unique theory and the characteristic of TCM intervention. An Extension to the original SPIRIT was developed to ensure the quality of trial design with TCM. As Chinese herbal formulae, acupuncture and moxibustion are common and representative interventions in TCM practice, the executive working group determined that the SPIRIT-TCM Extension focus on these three interventions. Extension was developed through initiation, 3 rounds of Delphi consensus survey, and finalizing expert meeting. Seven items from the SPIRIT 2013 Statement were modified, namely, "title", "background and rationale", "objectives", "eligibility criteria", "interventions", "outcomes", and "data collection methods". The Extension includes the introduction of the concept of TCM pattern and 3 major TCM interventions, with examples and explanations. The SPIRIT-TCM Extension 2018 provides suggestion for investigators in designing high quality TCM clinical trials. It is expected that wide dissemination and application of this extension ensure continuous improvement of TCM trial quality throughout the world.

关键词： SPIRIT traditional Chinese medicine clinical trial extension recommendation

Genomic Characterization of the First Sequenced Clinical Legionella micdadei Isolate from China

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Biomedical and Environmental Sciences 2023年第2期36卷 185-190页

作者： CHEN ai ping ZHANG Yong Jun Chongqing Medical and Pharmaceutical College Chongqing 401331China Chongqing Municipal Key Laboratory for High Pathogenic Microbes Chongqing 400042China

Since Legionella pneumophila(***)was identified in 1976 as the causative microorganism for severe pneumonia termed Legionnaires Disease(LD),more than 65 species belonging to the genus Legionella have been isolated worldwide[1].Approximately 20 Legionella *** been documented to be pathogenic in humans,primarily leading to transient flu-like illness(Pontiac fever)or rapid and potentially fatal pneumonia(LD).

关键词： Clinical primarily transient

Robust Estimation for Partial Functional Linear Regression Model Based on Modal Regression

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Journal of Systems Science & Complexity 2020年第2期33卷 527-544页

作者： YU ping ZHU Zhongyi SHI Jianhong ai Xikai School of Mathematics and Computer Science Shanxi Normal UniversityLinfen 041000China Department of Statistics Fudan UniversityShanghai 200433China

This paper presents a robust estimation procedure by using modal regression for the partial functional linear regression,which combines the common linear model with the functional linear regression *** outstanding merit of the new method is that it is robust against outliers or heavy-tail error distributions while performs no worse than the least-square-based estimation method for normal error *** slope function is fitted by *** suitable conditions,the authors obtain the convergence rates and asymptotic normality of the ***,simulation studies and a real data example are conducted to examine the finite sample performance of the proposed *** the simulation results and the real data analysis confirm that the newly proposed method works very well.

关键词： B-spline functional data analysis functional linear model modal regression

Linear Correlations between Peak Frequency of Gyrosynchrotron Spectrum and Photosphere Magnetic Fields

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Chinese Journal of Astronomy and Astrophysics 2007年第4期7卷 487-495页

作者： ai-Hua Zhou Jian-ping Li Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008

The gyrosynchrotron spectra are computed in a nonuniform magnetic field case, taking into account the self- and gyroresonance absorption. It is found that the peak frequency νp of the gyrosynchrotron spectrum systematically increases with the increasing photosphere magnetic field strength B0 and increasing viewing angle θ. It is also found for the first time that there are good positive linear correlations between νp and B0, and between log νp and log θ, with linear correlation coefficient 0.99 between νp and B0 and 0.95 between log νp and log θ. We apply the correlations to analyze two burst events observed with OVSA and find that the evolution tendencies of the photosphere magnetic field strength B0 estimated from the above expression are comparable with the observational results of SOHO/MDI. We also give a comparison of the diagnostic results of coronal magnetic field strength in both uniform and nonuniform source models.

关键词： Sun: flare - sun: radio emission - Sun: magnetic field

P2X_7 receptors in cerebral ischemia

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Neuroscience Bulletin 2013年第3期29卷 390-398页

作者： Hui-Yu Bai ai-ping Li Department of Physiology Dalian Medical University

Cerebral ischemia is one of the most common diseases resulting in death and disability in aged people. It leads immediately to rapid energy failure, ATP depletion, and ionic imbalance, which increase extracellular ATP levels and accordingly activate P2X7 receptors. These receptors are ATP-gated cation channels and widely distributed in nerve cells, especially in the immunocompetent cells of the brain. Currently, interest in the roles of P2Xz receptors in ischemic brain injury is growing. In this review, we discuss recent research progress on the actions of P2X7 receptors, their possible mechanisms in cerebral ischemia, and the potential therapeutic value of P2X7 receptor antagonists which may provide a new target both for clinical and for research purposes.

关键词： P2X7 receptor cerebral ischemia neurotoxicity calcium overload neuroinflammation neurotrans-mitter receptor antagonist

A New Periodic Solution to Jacobi Elliptic Functions of MKdV Equation and BBM Equation

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 409-415页

作者： Hong-cai MA Zhi-ping ZHANG ai-ping DENG Department of Applied Mathematics College of Science Donghua University Shanghai 201620 China School of Mathematics and Information Sciences Henan University Kaifeng 475000 China

Based on the homogeneous balance method, the Jacobi elliptic expansion method and the auxiliary equation method, the first elliptic function equation is used to get a new kind of solutions of nonlinear evolution equations. New exact solutions to the Jacobi elliptic function of MKdV equations and Benjamin-Bona-Mahoney （BBM） equations are obtained with the aid of computer algebraic system Maple. The method is also valid for other （l＋l）-dimensional and higher dimensional systems.

关键词： (1+1)-dimensional MKdV equation BBM equation auxiliary equation method traveling wavesolution nonlinear

Ergodic channel capacity of the spatial correlated rayleigh MIMO channel

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The Journal of China Universities of Posts and Telecommunications 2007年第4期14卷 32-35页

作者： ZHANG Hui-ping LIU ai-jun WU ping School of Languages Beijing University of Posts and TelecommunicationsBeijing 100876 China Key Laboratory of Universal Wireless Communications (Beijing University ofPosts and Telecommunications) Ministry of Education Wireless TechnologyInnovation Institute Beijing 100876 China

The theoretical capacity of the spatial correlated Rayleigh multiple input multiple output （MIMO） channel is an important issue in MIMO technology. In this article, an ergodic channel capacity formula of the spatial correlated rayleigh MIMO channel is provided, which is deduced when two antennas exist at either the transmitter or the receiver. The multi-dimensional least-squares fit algorithm is employed to narrow the difference between the theoretical formula capacity and the practical capacity. Simulation results show that the theoretical capacity approaches the practical one closely.

关键词： MIMO rayleigh fading channel shannon capacity

Development of Chinese Medicine Research in Hong Kong,China in Last Decade

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Chinese Journal of Integrative Medicine 2017年第7期23卷 483-485页

作者： LU ai-ping CHENG Shi-ping LIU Biao School of Chinese Medicine Hong Kong Baptist UniversityHong Kong SAR China School of Nursing Jiangxi University of Traditional Chinese Medicine Nanchang (330004) China

Chinese medicine（CM）has attracted wide attention from the public after the return of Hong Kong（HK）to China in July *** 1999,the HK Chinese Medicine Ordinance was enacted to confirm the legal position of CM and sin... 详细信息

关键词： legal entirely return funding institutions funded official encourage Figure Number