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| 1 | Overview on Submodule Topologies,Modeling,Modulation,Control Schemes,Fault Diagnosis,and Tolerant Control Strategies of Modular Multilevel Converters显示文摘In the present scenario,modular multilevel converters(MMCs)are considered to be one of the most promising and effective topologies in the family of high-power converters because of their modular design and good scalability;MMCs are extensively used in high-voltage and high-power applications.Based on their unique advantages,MMCs have attracted increasing attention from academic circles over the past years.Several studies have focused on different aspects of MMCs,including submodule topologies,modeling schemes,modulation strategies,control schemes for voltage balancing and circulating currents,fault diagnoses,and fault-tolerant control strategies.To summarize the current research status of MMCs,all the aforementioned research issues with representative research approaches,results and characteristics are systematically overviewed.In the final section,the current research status of MMCs and their future trends are emphasized. | Fujin Deng Yongqing Lu Chengkai Liu Qian Heng Qiang Yu Jifeng Zhao | 2020 | Chinese Journal of Electrical Engineering2020，6，1： | 15 |
| 2 | In vivo retention of poloxamer-based in situhydrogels for vaginal application in mouse and rat models显示文摘The purpose of this study is to evaluate the in vivo retention capabilities of poloxamer-based in situ hydrogels for vaginal application with nonoxinol-9 as the model drug. Two in situ hydrogel formulations, which contained 18% poloxamer 407 plus 1% poloxamer 188(GEL1, relative hydrophobic)or 6% poloxamer 188(GEL2, relative hydrophilic), were compared with respect to the rheological properties, in vitro hydrogel erosion and drug release. The vaginal retention capabilities of these hydrogel formulations were further determined in two small animal models, including drug quantitation of vaginal rinsing fluid in mice and isotope tracing with99 m Tc in rats. The two formulations exhibited similar phase transition temperatures ranging from 27 to 32 1C. Increasing the content of poloxamer 188 resulted in higher rheological moduli under body temperature, but slightly accelerated hydrogel erosion and drug release. When compared in vivo, GEL1 was eliminated significantly slower in rat vagina than GEL2,while the vaginal retention of these two hydrogel formulations behaved similarly in mice. In conclusion,increases in the hydrophilic content of formulations led to faster hydrogel erosion, drug release andintravaginal elimination. Rats appear to be a better animal model than mice to evaluate the in situ hydrogel for vaginal application. | Yu Liu Fujin Yang Linglin Feng Long Yang Lingyun Chen Gang Wei Weiyue Lu | 2017 | Acta Pharmaceutica Sinica B2017，7，4： | 5 |
| 3 | Circulating Current Suppression for MMC-HVDC Systems with Asymmetric Arm Impedance显示文摘The modular multilevel converter(MMC)has been a highly promising topology in the high-voltage direct-current(HVDC)transmission area,where each arm of the MMC may consist of hundreds of series-connected submodules and an inductor.Due to its parameter inaccuracy,component aging,and so on,the component parameter in different arms of the MMC may be different,which may cause circulating current in the MMC-HVDC transmission system,and result in current deterioration,power losses,and electromagnetic interference,etc.In this paper,the circulating current suppressing(CCS)in the MMC-HVDC system,due to asymmetric arm impedance,is analyzed.Based on the mathematical analysis,a method of using an auxiliary circuit is proposed for the MMC to realize the CCS and improve the performance of the MMC-HVDC system.Simulation studies are conducted with PSCAD/EMTDC in the HVDC system,which confirms the feasibility of the proposed method. | Fujin Deng Qian Heng Chengkai Liu Yongqing Lyu Qingsong Wang Dan Liu Rongwu Zhu | 2021 | CSEE Journal of Power and Energy Systems2021，7，3： | 3 |
| 4 | A Double Input-parallel-output-series Hybrid Switched-capacitor Boost Converter显示文摘A double input-parallel-output-series hybrid switched-capacitor boost(DIPOS-HSCB)converter is proposed which consists of two different kinds of input-parallel-output-series(IPOS)circuits,i.e.,inner IPOS circuit and outer IPOS circuit.Two boost modules and one switched-capacitor network build an inner IPOS circuit based IPOS-HSCB converter and two IPOS-HSCB converters develop the outer IPOS circuit based DIPOS-HSCB converter.With the proposed DIPOS-HSCB converter,a high voltage-gain with low component stress and small input current ripple are achieved.Furthermore,an automatic current balancing function for all input inductor currents can be also achieved using a special carrier phase-shifted modulation scheme.A prototype rated at 200 V/120 W has been developed and the maximum efficiency of the proposed DIPOS-HSCB converter is 95% at 120 W.Both steady and dynamic results are presented to validate the effectiveness of the proposed DIPOS-HSCB converter. | Jianfei Chen Kewei Ding Yulin Zhong Fujin Deng Sayed Abulanwar | 2020 | Chinese Journal of Electrical Engineering2020，6，4： | 2 |
| 5 | Statistical Analysis of Regularity of Pesticide Residues in Vegetables Produced in Inner Mongoli显示文摘[Objective]The paper was to study regularity of pesticide residues in vegetables produced in Inner Mongolia.[Method]Mathematical statistic analysis was carried out on 6 800 samples of veggies,fruits,leguminous vegetables,nuts and seeds produced in Inner Mongolia.[Result]The dominated vegetables in Inner Mongolia were green leafy vegetables,solanaceous vegetables and melon vegetables,and their yields accounted for 70%of the total vegetables production.Since 2003,with the rapid increase of detected vegetable numbers,the status of vegetable quality safety had entered into a new stage of sustainable steady after a rapid decline or periodic fluctuation,and the differences in safety levels were obvious,of which the range of exceeding standard rate of pesticide residues in solanaceous vegetables,melon vegetables and leguminous vegetables(about 55%of the total vegetables)was under 2%,with average values of 1.1%,1.6%and 3.1%,respectively.They belonged to stable type.The exceeding standard rate of pesticide residues in green leafy vegetables and Chinese cabbage group(about 30%of total vegetables)presented a decreasing trend year by year,wondering in the range of 7%-10%.They belonged to main risk type.The time period of exceeding standard of pesticide residues in root vegetables and cole vegetables was under predictable,and its exceeding standard rate in some years was over 5%(amplitude variation is over 15percentage points).They belonged to random risk type.The kinds of pesticides,which exceeding standard rate in vegetables were relatively intensive,presented variance in different vegetable species.70%of the pesticides belonged to intermittent over-limits and the probability was below 5%.About 20%tradition pesticides often exceeded standard and their probabilities were over 30%.The exceeding standard of organophosphorus and carbamates pesticides in vegetables presented a decreasing tend,while the risk of some new pesticides containing nitrogen element and high effective pyrethroids showed an increasing tendency.[Conclusion]The paper provided decision making services for agricultural management departments. | Fujin ZHANG Dekun HOU Jiang HE Tianyun GAO Hong LUO Songyan LANG Xinxin ZHANG Yiping YAO | 2013 | Agricultural Science & Technology2013，14，10： | 2 |
| 6 | Control Strategy of Wind Turbine Based on Permanent Magnet Synchronous Generator and Energy Storage for Stand-Alone Systems显示文摘This paper investigates a variable speed wind turbine based on permanent magnet synchronous generator and a full-scale power converter in a stand-alone system.An energy storage system(ESS)including battery and fuel cell-electrolyzer combination is connected to the DC link of the full-scale power converter through the power electronics interface.Wind is the primary power source of the system,the battery and FC-electrolyzer combination is used as a backup and a long-term storage system to provide or absorb power in the stand-alone system,respectively.In this paper,a control strategy is proposed for the operation of this variable speed wind turbine in a stand-alone system,where the generator-side converter and the ESS operate together to meet the demand of the loads.This control strategy is competent for supporting the variation of the loads or wind speed and limiting the DC-link voltage of the full-scale power converter in a small range.A simulation model of a variable speed wind turbine in a stand-alone system is developed using the simulation tool of PSCAD/EMTDC.The dynamic performance of the stand-alone wind turbine system and the proposed control strategy is assessed and emphasized with the simulation results. | Fujin Deng Dong Liu Zhe Chen Peng Su | 2017 | Chinese Journal of Electrical Engineering2017，3，1： | 2 |
| 7 | Control of improved full-bridge three-level DC/DC converter for wind turbines in a DC Grid显示文摘 | Deng Fujin Chen Zhe | 2013 | IEEE Transactions on Power Electronics2013，28，1： | 1 |
| 8 | Study on the distribution law of high pressure water jet impact pressure显示文摘 | LIN Fujin XIA Yongjun ZHOU Weidong | 2008 | Mining Safety and Environmental Protection2008，35，1： | 1 |
| 9 | Study on the Effect of Two-Step Saturated Steam Heat Treatment Process on the Properties of Reconstituted Bamboo显示文摘With the aim of utilizing reconstituted bamboo as a carbon cycle oriented material,the improvement of physical and mechanical properties has been actively studied to solve using problems The saturated steam heat treatment process has been widely used in worldwide.With the development and exploration of this technology,two step satu-rated steam heat treatment process appears in some practical production,that is,affer a period of saturated steam heat treatment at a lower temperature,the bamboo bundles are taken out and seasoned for a period of time,and then put back into the heat tank again,and heated at a higher temperature for another period of time.During the two-step saturated steam heat treatment,the physical and mechanical properties of bamboo changed.However,the mechanism of two step saturated steam heat treatment has not been thoroughly discussed.For purpose that this paper all discuss and find out the mechanism of two step saturated steam heat treatment on the change of physical and mechanical properties of reconstituted bamboo.In this work,the one and two step saturated steam heat treat-ments were carried out according to the actual production parameters,and the physical and mechanical properties of the reconstituted bamboo board made of treated bamboo bundles were analyzed,including the color change,the thickness swelling(TS),modulus of elasticity(MOE),modulus of rupture(MOR)and shear strength.The results indicate that two-step saturated steam heat treatment is better than one step.Based on the detailed study of the chemical composition,crytalinity and micro morphologial characteristics of the heated bamboo bundles,it is further revealed that during two-step saturated steam heat treatment,oxygen air is added to the reaction system between the two heat treatment processes to further catalyze the oxidation of hemicellulose and enhance the crystal-linity of cellulose,so as to improve the properties of the final products.Our work has optimized the saturated steam heat treatment process which is widely used in industry,pointing out a new idea in the experimental and theoretical basis for the development of recombinant bamboo manufacturing industry. | Xin Han Zhichao Lou Chenglong Yuan Xinwu Wu Jie Liu Fujin Weng Yanjun Li | 2022 | Journal of Renewable Materials2022，10，12： | 1 |
| 10 | Development of imaging techniques for fast neutron radiography in Japan显示文摘 | FUJINE S YONEDA K YOSHII K | 1999 | Nucl Instrum Methods1999，424，： | 1 |
| 11 | YFTY720 and cisplatin synergistically induce the death of cisplatin-resistant melanoma cells through the downregulation of the PI3K pathway and the decrease in epidermal growth factor receptor expression显示文摘 | Ishitsuka A Fujine E Mizutani | 2014 | Int J Mol Med2014，34，4： | 1 |
| 12 | Distribution of Nitrous Acid Between Tri-n-butyl Phosphote in n-Do-became and Nitric Acid显示文摘 | Uchiyama O Hotoku S Fujine S | 1998 | Solvent Extra Ion Exch1998，16，5： | 1 |
| 13 | Initial characterization of Arabidopsis T-DNA insertion mutants of the 1QM1 gene that encodes an IQ Motif-containing protein 显示文摘 | Zhou Y P Fujine T Wang X L | 2007 | Plant Cell Physiol2007，，： | 1 |
| 14 | Evaluation of pounding countermeasures and serviceability of elevated bridges during seismic excitation using 3D modeling 显示文摘 | Zhu P Abe M Fujin Y | 2004 | Earthquake Engineering and Structural Dynamics2004，33，： | 1 |
| 15 | Modelling three-dimensional non- linear seismic performance of elevated bridges with emphasis on pounding of girders 显示文摘 | Zhu P Abe M Fujin Y | 2002 | Earthquake Engineering and Structural Dynamics2002，31，： | 1 |
| 16 | Simultaneous determination of NK-104 and its lactone in biological samples by column switching highperform an celiquid ehromatography with ultravio let detection 显示文摘 | Kojima J Fujin o H Yosimura M | 1999 | J Chromatogr B Biomed Sci Appl1999，724，1： | 1 |
| 17 | Distribution of nitrous acid between tri n butyl phosphate/n dode cane and nitric acid显示文摘 | Uchiyama G Hotoku S Fujine S | 1998 | Solvent Extr Ion Exch1998，16，5： | 1 |
| 18 | Fluctuations in the late Quaternary East Asian winter monsoon recorded in sediment records of surface water cooling in the northern Japan Sea 显示文摘 | Ikehara K Fujine K | 2012 | Journal of Quaternary Science2012，27，9： | 1 |
| 19 | Control of improved full-bridge three-level DC/DC converter for wind turbines in a DC grid显示文摘 | Deng Fujin Chen Zhe | 2013 | IEEE Transactions on Power Electronics2013，28，1： | 1 |
| 20 | Operation and control of a DC- grid offshore wind farm under DC transmission system faults显示文摘 | DENG Fujin CHEN Zhe | 2013 | IEEE Transactions on Power Delivery2013，28，3： | 1 |
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