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Simulation applied to working frequency selection in large-scale vi- brating screen＇s design

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Journal of Coal Science & Engineering(China) 2011年第4期17卷 439-442页

作者： PENG Chen-yu su rong-hua School of Mechanics and Engineering Liaoning Technical University Fuxin 123000 China

The working frequency selection of the ZK30525 vibrating screen was studied using ANSYS. Integrating the dynamic performance simulation analysis of the vibrating screen structure, the variation laws of beams＇ vibration displacements changing with different exciting frequencies were researched. These beams include six beams, with one discharging beam and one in-material beam. Results indicate that vibration displacements in the middle of these beams increase with the augmenta- tion of exciting frequency. When exciting frequency exceeds a certain value, there exists a flat change region for vibration displacement. According to vibrator characteristics, the vibrating screen＇s working frequency should be selected in the flat change region, and be far away from modal frequencies. The study provides theoretical guidance for the reasonable working frequency selection of the large-scale vibrating screen.

关键词： working frequency vibrating screen exciting frequency exciting force

Synthesis and Characterization 9-tungstosilicate Complexes with Transition Metal

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Wuhan University Journal of Natural Sciences 1999年第3期4卷 341-344页

作者： Jin su-rong Liu Shi-zhong Wang Zheng Meterial Institute Wuhan University of Technology Wuhan China Institute of Chemistry and Material Science Hubei University Wuhan China

The title complexes KaHb[M(SiW9O34)2]?mH2O(M=Ni,Cu,Zn,Fe or Mn) were synthesized by SiW9O34 10? with transition metal respectively and their structure were characterized by mean of elemental analysis, TG-DTA, IR spectra and, UV spectra. In addition, their redox properties in solution were investigated using polarographic and cyclic voltammographic methods. Experimental results indicated that the complexes have Keggin structure and that the heteropolyanions underwent two-step, two-electron tungsten reduction processes.

关键词： heteropoly complexes transition metal synthesis and characterization

The D253N Mutation in the Polymerase Basic 2 Gene in Avian Influenza(H9N2) Virus Contributes to the Pathogenesis of the Virus in Mammalian Hosts

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Virologica Sinica 2018年第6期33卷 531-537页

作者： Jinfeng Zhang rong su Xiaoyun Jian Hongliang An Ronbing Jiang Chris Ka Pun Mok Laboratory Medicine Center Foshan Hospital of Traditional Chinese Medicine Guangzhou University of Chinese Medicine Department of Respiratory Medicine Foshan Hospital of Traditional Chinese Medicine Guangzhou University of Chinese Medicine State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory Health The First Affiliated Hospital of Guangzhou Medical University HKU-Pasteur Research Pole School of Public Health HKU Li Ka Shing Faculty of Medicine The University of Hong Kong

Mutations in the polymerase basic 2(PB2) gene of avian influenza viruses are important signatures for their adaptation to mammalian hosts. Various adaptive mutations have been identified around the 627 and nuclear localization sequence(NLS) domains of PB2 protein, and these mutations contribute to the replicative ability of avian influenza ***, few studies have focused on adaptive mutations in other regions of PB2. In this study, we investigated the functional roles of the D253N mutation in PB2 in an H9N2 virus. This mutation was found to affect an amino acid residue in the middle domain of the PB2 protein. The virus with the D253N mutation showed higher polymerase activity and transiently increased viral replication in human cells. However, the mutant did not show significant differences in viral replication in the respiratory tract of mice upon infection. Our results supported that the D253N mutation in the middle domain of PB2, similar to mutations at the 627 and NLS domains, specifically contributed to the replication of avian influenza viruses in human cells.

关键词： Avian influenza virus Mammalian adaptation D253N Polymerase basic 2(PB2) H9N2

Simultaneous determination of fluorine and iodine in urine by ion chromatography with electrochemical pretreatment

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Chinese Chemical Letters 2009年第12期20卷 1483-1486页

作者： Kang Kang Hu Wei Xiong Huang Yu Hua su rong Zong Hu Department of Chemistry College of Chemistry and Chemical Engineering and The Key Laboratory of Analytical Sciences of the Ministry of Education Xiamen University Xiamen 361005 China

A new method for the simultaneous determination of fluorine and iodine in urine by ion chromatography （IC） with electrochemical pretreatment has been developed. The pretreatment was performed in a novel electrochemical oxidationneutralization device （EOND）, in which iodide of the sample was oxidized to iodate and the alkaline digestion sample solution was neutralized. Under the optimized conditions, the limits of detection （LOD, S/N = 3） were 2.5 μg/L for fluoride and 20 μg/L for iodate, respectively. The recoveries were in the range of 93-102% for fluoride and 86-98% for iodate.

关键词： Fluorine Iodine Urine Electrochemical pretreatment Ion chromatography

Using Satellite Data to Analyze the Initiation and Evolution of Deep Convective Clouds

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Atmospheric and Oceanic Science Letters 2013年第6期6卷 445-450页

作者： CAO Zhi-Qiang HUANG Qing-Ni ZHAO su-rong Institute of Atmospheric Physics Chinese Academy of Sciences Graduate University of the Chinese Academy of Sciences National Satellite Meteorological Center National Meteorological Center

In this study, two deep convective cloud cases were analyzed in detail to study their initiation and evolution. In both cases, all deep convective clouds were positioned at the rear of the cold front cloud bands and propagated backward. Satellite data showed that prior to initiation of the deep convective clouds, thermodynamic and moist conditions were favorable for their formation. In the morning, a deep convective cloud at the rear of cold front cloud band propagated backward, the outflow boundary of which created favorable conditions for initiation. An additional deep convective cloud cluster moved in from the west and interacted with the outflow boundary to develop a mesoscale convective system(MCS) with large, ellipse-shaped deep convective clouds that brought strong rainfall. The initiation and evolution of these clouds are shown clearly in satellite data and provide significant information for nowcasting and short-term forecasting.

关键词： deep convective clouds satellite data initiation evolution

Phrenic nerve transfer to the musculocutaneous nerve for the repair of brachial plexus injury: electrophysiological characteristics

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Neural Regeneration Research 2015年第2期10卷 328-333页

作者： Ying Liu Xun-cheng Xu Yi Zou su-rong Li Bin Zhang Yue Wang Department of Neurology Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital Department of Orthopedics Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital

Phrenic nerve transfer is a major dynamic treatment used to repair brachial plexus root avulsion. We analyzed 72 relevant articles on phrenic nerve transfer to repair injured brachial plexus that were indexed by Science Citation Index. The keywords searched were brachial plexus injury, phrenic nerve, repair, surgery, protection, nerve transfer, and nerve graft. In addition, we per-formed neurophysiological analysis of the preoperative condition and prognosis of 10 patients undergoing ipsilateral phrenic nerve transfer to the musculocutaneous nerve in our hospital from 2008 to 201 3 and observed the electromyograms of the biceps brachii and motor conduc-tion function of the musculocutaneous nerve. Clinically, approximately 28% of patients had brachial plexus injury combined with phrenic nerve injury, and injured phrenic nerve cannot be used as a nerve graft. After phrenic nerve transfer to the musculocutaneous nerve, the regener-ated potentials ifrst appeared at 3 months. Recovery of motor unit action potential occurred 6 months later and became more apparent at 12 months. The percent of patients recovering ‘ex-cellent’ and ‘good’ muscle strength in the biceps brachii was 80% after 18 months. At 12 months after surgery, motor nerve conduction potential appeared in the musculocutaneous nerve in seven cases. These data suggest that preoperative evaluation of phrenic nerve function may help identify the most appropriate nerve graft in patients with an injured brachial plexus. The func-tional recovery of a transplanted nerve can be dynamically observed after the surgery.

关键词： nerve regeneration phrenic nerve brachial plexus injury nerve transfer nerve repair musculocutaneous nerve nerve function test bibliometrics neural regeneration

Optimization and Construction of Collaborative Office under the Background of Smart Campus in Universities

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Intelligent Information Management 2024年第1期16卷 1-9页

作者： rong su Information Network and Data Center China University of Geosciences (Beijing) Beijing China

At present, with the continuous development of technologies such as the Internet, big data, and artificial intelligence, smart campuses in universities are being rapidly constructed. Improving the informatization level of administrative management work is also an important content. The collaborative office work in multiple departments requires more standardized, convenient, intelligent, and secure office systems. In response to this issue, this article analyzes the optimization and construction process of collaborative office systems based on the development of university informatization, summarizes the operational results, and explores the prospects of smart office.

关键词： Collaborative Office Office Automation OA Smart Campus Informatization Administration

SINGULAR PERTURBATION OF BOUNDARY VALUE PROBLEM OF SYSTEMS FOR QUASILINEAR ORDINARY DIFFERENTIAL EQUAT1ONS

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Applied Mathematics and Mechanics(English Edition) 1990年第11期11卷 1035-1042页

作者： Lin Zong-chi Lin su-rong Fujian Normal Liniversils Fuzhou Fijian Broadcasting TV University Fuzhou

In this paper,we study the singular perturbation of boundary value problem of systems for quasilinear ordinary differential equations:x'=j(i,x,y,ε),εy'=g(t,x,y,ε)y'+h(t,x,y,ε),y(0,ε)=A(ε),y(0,ε)=B(ε),y(1,ε)=C(ε)where xf.y,h,A,B and C belong to Rn and a is a diagonal *** the appropriate assumptions,using the technique of diagonalization and the theory of differential inequalities we obtain the existence of solution and its componentwise uniformly valid asymptotic estimation.

关键词： Quasilinear systems Singularly perturbed boundary value problem,Diagonalization and differential inequality Asymptotic expansion.

Design of weak current measurement system and research on temperature impact

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Nuclear Science and Techniques 2024年第4期35卷 46-56页

作者： Chu-Xiang Zhao San-Gang Li rong-rong su Li Yang Ming-Zhe Liu Qing-Yue Xue Shan Liao Zhi Zhou Qing-Shan Tan Xian-Guo Tuo Yi Cheng College of Nuclear Technology and Automation Engineering Chengdu University of Technology1#DongsanluErxianqiaoChengdu 610059China Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province Chengdu University of Technology1#DongsanluErxianqiaoChengdu 610059China University of Science and Technology of China Hefei 230026China School of Physics and Electronic Engineering Sichuan University of Science and EngineeringZigong 643000China

A dedicated weak current measurement system was designed to measure the weak currents generated by the neutron ionization *** system incorporates a second-order low-pass filter circuit and the Kalman filtering algorithm to effectively filter out noise and minimize interference in the measurement *** conducted under normal temperature conditions has demonstrated the system's high precision ***,it was observed that temperature variations can affect the measurement *** were collected across temperatures ranging from -20 to 70℃,and a temperature correction model was established through linear regression fitting to address this *** feasibility of the temperature correction model was confirmed at temperatures of -5 and 40℃,where relative errors remained below 0.1% after applying the temperature *** research indicates that the designed measurement system exhibits excellent temperature adaptability and high precision,making it particularly suitable for measuring weak currents.

关键词： Weak current measurement system Neutron ionization chamber Kalman filter algorithm Temperature correction model