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| 1 | Formation and migration of space charge packet in low density polyethylene显示文摘Pressure wave propagation (PWP) method was utilized to observe the space charges packet-like behavior in sheet samples of low-density polyethylene (LDPE) under the relative low electric field. The experimental results show that space charge packets are always generated at the anode and move across the sample to the cathode regard- less of the polarity of DC voltage. This paper discusses the migration of space charge packets at 30―40 ℃ , the possible charge resource of space charge packets carriers and trap level of the space charge. | ZHENG Feihu 1 , ZHANG Yewen 1 , GONG Bin 1 , ZHU Jianwei 1 & WU Changshun 2 1. Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China 2. China National Center for Quality Supervision and Test of Electric Ware and Cable, Shanghai 200093, China | 2005 | Science China(Technological Sciences)2005，48，3： | 4 |
| 2 | Percutaneous penetration enhancement effect of essential oil of mint (Mentha haplocalyx Briq.) on Chinese herbal components with different lipophilicity显示文摘Objective:To investigate the percutaneous penetration effect of essential oil of mint from Mentha haplocalyx Briq.on the complex active components in Chinese herbal external preparations,and assess its toxicity on the skin cells.Methods:The cytotoxicity of mint oil on HaCaT keratinocytes and CCC-ESF-1 fibroblasts was measured using an MTT assay.Five model drugs with a wide range of lipophilicity,namely osthole,tetramethylpyrazine,ferulic acid,puerarin,and geniposide,were tested using in vitro permeation studies to investigate the percutaneous penetration enhancement effect of mint oil.Secondary structure alterations of skin stratum corneum(SC)were measured using Fourier transform infrared spectroscopy(FTIR).Saturation solubilities and SC/vehicle partition coefficients of the five model drugs with and without mint oil were also determined to understand the potential mechanisms of the essential oil.Results:Half maximal inhibitory concentration(IC50)values of mint oil were significantly higher in HaCaT and CCC-ESF-1 cell lines than values in the well-established and standard penetration enhancer Azone.Conclusions:Mint oil at proper concentration could effectively facilitate percutaneous penetration of both lipophilic and hydrophilic drugs,and exhibit higher efficiency for moderate hydrophilic drugs.Mechanisms of penetration enhancement by mint oil could be explained with saturation solubility,SC/vehicle partition coefficient and the secondary structure change of SC. | Jingyan Wang Yi Lan Hui Li Yewen Zhang Qing Zhang Yanfeng Cao Qing Wu | 2014 | Journal of Traditional Chinese Medical Sciences2014，1，2： | 4 |
| 3 | A Frequency-Diversity Spread-Spectrum Multiple Access System with Random Signature Sequences显示文摘AFrequency-DiversitySpread-SpectrumMultipleAccessSystemwithRandomSignatureSequencesCaoYewen;XiangHaige(PekingUniversity,Beiji... | Cao Yewen Xiang Haige(Peking University,Beijing 100871) | 1995 | 通信学报1995，16，4： | 3 |
| 4 | A Method for Improving CNN-Based Image Recognition Using DCGAN显示文摘Image recognition has always been a hot research topic in the scientific community and industry.The emergence of convolutional neural networks(CNN)has made this technology turned into research focus on the field of computer vision,especially in image recognition.But it makes the recognition result largely dependent on the number and quality of training samples.Recently,DCGAN has become a frontier method for generating images,sounds,and videos.In this paper,DCGAN is used to generate sample that is difficult to collect and proposed an efficient design method of generating model.We combine DCGAN with CNN for the second time.Use DCGAN to generate samples and training in image recognition model,which based by CNN.This method can enhance the classification model and effectively improve the accuracy of image recognition.In the experiment,we used the radar profile as dataset for 4 categories and achieved satisfactory classification performance.This paper applies image recognition technology to the meteorological field. | Wei Fang Feihong Zhang Victor S.Sheng Yewen Ding | 2018 | Computers, Materials & Continua2018，，10： | 3 |
| 5 | Effect of co-existent components in CO2 supercritical fluid extract of Angelica Sinensis Radix on metabolism of Z-ligustilide after oral administration in rats显示文摘Objective:To establish a basis for Angelica Sinensis Radix(ASR)as a dietary supplement for colorectal cancer chemoprevention,the effect of co-existent components in supercritical fluid extract(SFE)of ASR on the pharmacokinetics of Z-ligustilide after oral administration was investigated in vitro and in vivo.Methods:Incubation in gastrointestinal contents and incubation in rat liver tissue homogenates post-mitochondrial supernatant(PMS)experiments were used to study changes in the levels of Z-ligustilide in vitro.Results:Within 4 hours,the level of Z-ligustilide in SFE declined at a slower rate than in its pure form.Clearance of Z-ligustilide after administration in its pure form was significantly slower than that of SFE of ASR(CL,0.96±0.16 mL·min/kg versus 1.24±0.21 mL·min/kg P<0.05;AUC,243.37±16.84 versus 176.69±12.59 mg·min/L).Conclusion:These phenomena may be attributed to the interactions between the co-existent components in SFE of ASR and Z-ligustilide enhancing the stability of Z-ligustilide.These results suggest that the bioavailability of Z-ligustilide in SFE of ASR is improved.However,stabilization of plasma concentration was not sustained,so that the efficacy of active components could not be maintained.Thus,further processing of SFE of ASR is required. | Bochen Zhao Qing Zhang Hongmei Lin Qingguo Ru Qian Kang Hui Li Yewen Zhang Qing Wu | 2014 | Journal of Traditional Chinese Medical Sciences2014，1，2： | 2 |
| 6 | Computer-Assisted DEM-Based Aero Photography Design显示文摘在航空测量,主要因素是地面波动。然而,大多数为航空测量设计使用的外部航空测量软件不考虑地面波动影响。因此,设计结果有比较 randomicity 和“差距”被期望。一个航空测量设计系统被与 DEM 数据分析地面波动影响到设计结果开发以便前面的重叠和方面重叠能根据块地面波动被认为正当遇见说明或标准。这个系统设计的数据与真实的飞数据相比。结果证明使用 DEM 在航空测量设计帮助能保证设计结果更好适合真实地面。 | FAN Yewen GONG Jianya TAN Chengguo WANG Ruiyao | 2008 | Geo-Spatial Information Science2008，11，1： | 2 |
| 7 | Trifluoromethylation of Alkyl Radicals: Breakthrough and Challenges显示文摘Trifuoromethylation of alkyl radicals is emerging as a powerful tool for C(sp3)-CFs bond formations.Based on the hypothesis of CF3 group transfer from Cu(Ⅱ)-CFs3 to alkyl radicals,a number of tifuoromethylation reactions have been developed,including tifloromethylation of alkyl halides,decarboxyla-tive trifluoromethylation of aliphatic carboxylic acids,C(sp'H-H tifluoromethylation,amino-and carbo-tifluoromethylation of alkenes,etc.Challenges in this intriguing field are also discussed. | Lin Zhu Yewen Fang Chaozhong Li | 2020 | Chinese Journal of Chemistry2020，38，7： | 2 |
| 8 | Using unmanned aerial vehicles with thermal-image acquisition cameras for animal surveys:a case study on the Sichuan snub-nosed monkey in the Qinling Mountains显示文摘Following significant developments in technology,alternative devices have been applied in fieldwork for animal and plant surveys.Thermal-image acquisition cameras installed on unmanned aerial vehicles(UAVs)have been used in animal surveys in the wilderness.This article demonstrates an example of how UAVs can be used in high mountainous regions,presenting a case study on the Sichuan snub-nosed monkey with a detection rate of 65.19%for positive individual identification.It also presents a model that can prospectively predict population size for a given animal species,which is based on combined initial work using UAVs and traditional surveys on the ground.A great potential advantage of UAVs is significantly shortening survey procedures,particularly for areas with high mountains and plateaus,such as the Himalayas,the Qinghai-Tibet Plateau,Hengduan Mountains,the Yunnan-Gui Plateau and Qinling Mountains in China,where carrying out a traditional survey is extremely difficult,so that species and population surveys,particularly for critically endangered animals,are largely absent.This lack of data has impacted the management of endangered animals as well as the formulation and amendment of conservation strategies. | Gang HE Haitao YANG Ruliang PAN Yewen SUN Pengbin ZHENG Jinghua WANG Xuelin JIN Jingjie ZHANG Baoguo LI Songtao GUO | 2020 | Integrative Zoology2020，15，1： | 2 |
| 9 | Combustion Characteristics of Coal in a Mixture of Oxygen and Recycled Flue Gas 显示文摘 | TAN Yewen Croiset E Douglas M | 2006 | Fuel2006，85，4： | 1 |
| 10 | Enxymohistochemical study on burn effect on rat inteslinal NOS显示文摘 | Qiugui Wang Liya He Yewen Chen | 2000 | World Journal of Gastroenterlogy2000，6，3： | 1 |
| 11 | Combustion characteristics of coal in a mixture of oxygen and recycled flue gas 显示文摘 | Tan Yewen Croiset E Douglas Mark A | 2006 | Fuel2006，85，4： | 1 |
| 12 | Combustion characteristics of coal in a mixture of oxygen and recycled flue gas显示文摘 | Tan Yewen Croisetb E Douglasa M A | 2006 | Fuel2006，85，4： | 1 |
| 13 | Formation and migration of space charge packet in low density polyethylene显示文摘 | Feihu Zheng Yewen Zhang Bin Gong Jianwei Zhu Changshun Wu | 2005 | Science in China Ser E Engineering & Materials Science2005，，3： | 1 |
| 14 | The structure of XLPE and the distribution of space charge显示文摘 | Li Jixiao Zhang Yewen Zheng Feihu Wu Changshun Xia Zhongfu | 2003 | Science in China Series G: Physics Mechanics and Astronomy2003，，2： | 1 |
| 15 | Evidence of strong correla tion between space-charge buildup and breakdown in cable insu lation显示文摘 | Zhang Yewen Lewiner J Alquie C | 1996 | IEEE Transactions on Dielectrics and Electrical Insulation1996，3，6： | 1 |
| 16 | Combustion characteristics of coal in a mixture of oxygen and recycled flue gas显示文摘 | Yewen Tana Eric Croisetb Mark A | 2005 | Fuel2005，85，： | 1 |
| 17 | An investigation of mercury, distribution and speciation during coal combustion 显示文摘 | Yewen Tan Renata Mortazavi Bob Dureau | 2004 | Fuel2004，，83： | 1 |
| 18 | Combustion Characteris: tics of Col in a Mixture of Oxygen and Recycled Flue Gas显示文摘 | Yewen T Eric C Mark A | 2005 | Fuel2005，85，4： | 1 |
| 19 | Combustion characteristics of coal in n mixture of oxygen and recycled fuel gas显示文摘 | TAN Yewen CROISETB E DOUGLASA M A | 2006 | Fuel2006，85，4： | 1 |
| 20 | Evidence of strong correlation between space-charge buildup and breakdown in cable insulation显示文摘 | ZHANG Yewen LEWINER J ALQUI(E) C | 1996 | IEEE Transactions on Dielectrics and Electrical Insulation1996，3，6： | 1 |
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