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Journal of Jianghan University(Natural Science Edition)    2019, 47 (2): 98-100.   Abstract （537）      PDF （903KB）（9633）       Knowledge map    Save Related Articles | Metrics

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Preparation of Ion Doped Li4Ti5O12 and Its Capacitive Performance ZHAO Jinwei，WANG Zhe，HAO Yudan，YU Guoxian Journal of Jianghan University(Natural Science Edition)    2019, 47 (2): 110-114.   DOI: 10.16389/j.cnki.cn42-1737/n.2019.02.002 Abstract （543）      PDF （2103KB）（4561）       Knowledge map    Save In this paper，the effects of ion species on material properties were investigated by ion doping modification of lithium titanate doped Al3+，Zr4+ and AlF3 prepared with high temperature solid phase method in laboratory. The structure and electrochemical properties of the four materials were characterized by methods of XRD，galvanostatic charge- discharge，cyclic voltammetry and AC impedance. The results showed that the doping of three ions could improve the electrochemical performance of lithium titanate materials. The performance of AlF3 doping was the best，the specific capacity was increased by more than three times and the specific capacity was not significantly attenuated after 200 cycles. The capacity retention rate was above 95%. Related Articles | Metrics

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Preparation of Two-dimensional Nanostructured Carbon Materials with Inorganic-organic Hybridization Strategy and Their Capacitive Performance CHEN Shengrui，WANG Jian，WU Xuezhuang，HUANG Gaoxu，GUO Jinglong，LIU Yan，LIU Honghao，TANG Shun，CAO Yuancheng，LIANG Jiyuan Journal of Jianghan University(Natural Science Edition)    2019, 47 (2): 101-109.   DOI: 10.16389/j.cnki.cn42-1737/n.2019.02.001 Abstract （643）      PDF （3670KB）（4343）       Knowledge map    Save In this study，two dimensional nanostructured carbon materials were prepared through inorganic and organic hybrid method that glucose was intercalated into the laminates of iron（III） chloride hexahydrate. The obtained hybrid composite was then thermally carbonized and followed by acid etching. The microstructure and composition of the samples were characterized by scanning electron microscopy（SEM），transmission electron microscopy（TEM），thermogravimetric analysis （TG），X- ray diffraction（XRD），Ramanspectra and other characterization methods. A three electrode system was used to evaluate the electrochemical properties of the two-dimensional carbon materials and 6 mol/L KOH was used as electrolyte. The results showed that at 0. 5 A/g current density，the mass specific capacitance of the prepared two-dimensional carbon material electrode was up to 236 F/g. When current density increased to 10 A/g，the specific capacitance could still be maintained at 201 F/g，and the specific capacitance retention rate was 85. 2%，this indicated a good rate performance. In addition，the electrode also exhibited excellent cycling stability，which still maintained the initial specific capacitance after 1 000 cycles at a current density of 10 A/g. Related Articles | Metrics

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Current Situation of Regulations on Recycling and Disposal of Waste Electrical and Electronic Equipments YANG Liqun，LU Min，ZHANG Xu Journal of Jianghan University(Natural Science Edition)    2019, 47 (2): 124-131.   DOI: 10.16389/j.cnki.cn42-1737/n.2019.02.004 Abstract （500）      PDF （3523KB）（4116）       Knowledge map    Save Associated with the rapid generation of large amounts of waste electrical and electronic equipments （WEEE） which are not only contaminants but also some valuable components，governments have been concerned about regulations to recycle and dispose these WEEE. This study focused on and compared the policies that have been applied for WEEE management in developed countries including German Netherland，America，and the developing countries including China，India and Brazil，along with the analysis of characters and advantages of these policies and strategies. The WEEE recycling system，fund subsidy，review process etc. were also studied to establish and improve a scientific and reasonable system for WEEE disposal in China. Related Articles | Metrics

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Synthesis and Capacitive Performance of a Metal-organic Frameworks Based on Nickel-terephthalic Acid HU Chuanzheng，ZOU Lunfei，XU Junhui，LU Zhen，WANG Yazhen Journal of Jianghan University(Natural Science Edition)    2019, 47 (2): 115-123.   DOI: 10.16389/j.cnki.cn42-1737/n.2019.02.003 Abstract （729）      PDF （7330KB）（2214）       Knowledge map    Save A kind of metal-organic frameworks（Ni-PTA MOFs）was prepared with hydrothermal reaction method using nickel nitrate hexahydrate and p-phthalic acid（PTA）as raw materials. The structure and properties of the product synthesized were characterized by X-ray diffraction technique，cyclic voltammetry method and galvanostatic charge-discharge technique. The influences of reaction temperature and molar ratio of reactants on the structure and capacitive performance of the product were investigated. The test results showed that the MOFs obtained had high specific capacitance when the reaction temperature was 180 ℃ and the molar ratio of nickel nitrate to p-phthalic acid was 1∶1，the discharge time was up to 477 s and the specific capacitance was as high as 1 403 F/g at a current density of 1 A/g. However，only 45% of the initial capacitance value was maintained after 1 000 cycles of galvanostatic charge and discharge at a current density of 10 A/g. Related Articles | Metrics

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Review on Low-temperature SCR Denitration Catalysts GAO Xiang，LU Xujie ，HU Minghua Journal of Jianghan University(Natural Science Edition)    2014, 42 (2): 12-18.   Abstract （477）      PDF （541KB）（2193）       Knowledge map    Save Nowadays，NOx pollution becomes more and more serious ，low temperature SCR denitration technology，as a kind of new and potential denitration technology，has attract people′s attention. Gives a summary and commentary on the research status of low temperature SCR denitration catalysts and mainly introduces the scientific research status of manganese catalysts，vanadium catalysts and other metal oxide catalysts. Indicates the different types of catalyst preparation methods，carriers，and the use of different kinds of metal oxides may all have influence on the catalyst activity and the efficiency of denitrification. Meanwhile，the denitration mechanism of low -temperature SCR catalysts is introduced. At last ，elaborates the effects of water vapor and SO2 in fuel gas on catalytic process. Related Articles | Metrics

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Development Status on Effect of Ligands on Synthesis of Quantum Dots WEN Dan，YU Yanhua， FU Cheng， ZHANG Weiying，ZHANG Zhengtao Journal of Jianghan University(Natural Science Edition)    2015, 43 (1): 12-18.   Abstract （500）      PDF （898KB）（2112）       Knowledge map    Save The quantum dots（QDs）have the feature that the emission spectrum can be regulated with particle size，the emission spectrum scope can be regulated with the element composition or the particle size of QDs，the luminous efficiency and the color purity are high. In recent years，QDs are widely applied in displaying and luminous domain. The surface ligands can influence the luminous efficiency of QDs，reviews the recent research status of QDs surface ligands at home and abroad，and the effects of different ligands on the nucleation， growth， shape， fluorescence properties and stability of QDs. Related Articles | Metrics

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Analysis and Comparison of Congestion Control Protocol in Linux Kernel LUO Jinwei， LI Chunfei Journal of Jianghan University(Natural Science Edition)    2015, 43 (4): 353-358.   Abstract （606）      PDF （2285KB）（1849）       Knowledge map    Save Based on testbed network experimental research， investigated five congestion control protocols in Linux kernel， such as Cubic， Htcp， Hybla， Westwood and Veno in different network environments. The link utilization， RTT fairness and TCP friendliness were compared. Then analyzed the experiment results， and evaluated the advantage and disadvantage of these algorithms. On this base， considering Cubic and Veno， a new environmental adaptive congestion control protocol， named CVTCP has been designed and tested. The experimental results showed， the link utilization rate was fairly high without obvious reducing RTT fairness and TCP friendliness， the CVTCP has good environmental adaptability. Related Articles | Metrics

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Journal of Jianghan University(Natural Science Edition)    2009, 37 (2): 31-34.   Abstract （416）      PDF （1114KB）（1817）       Knowledge map    Save Related Articles | Metrics

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Arterial Blood and Venous Plasma Comparative Analysis of Potassium and Sodium TIAN Qiang, SHEN Yun-feng, ZHANG Hong-bo Journal of Jianghan University(Natural Science Edition)    2011, 39 (2): 73-75.   Abstract （635）      PDF （1310KB）（1814）       Knowledge map    Save ObjectiveArterial blood gas analyser and electrolyte analyser were used to measure arterial blood and venous plasma potassium and sodium ion concentration, the experimental data were statistically compared the differences between them and derived the linear relationship, discussed the clinical significance.Methods Using American production of GEM PREMIER 3000 blood gas analyser and Roche production of ROCHE 9180 electrolyte analyser, detected in 85 cases with arterial blood and venous plasma the potassium and sodium concentration, compared arterial blood and venous plasma potassium, sodium and relevance.Results Arterial blood and venous plasma potassium concentration were significantly different(P<0.05), arterial blood, arterial plasma and venous plasma sodium concentration were not significant differences(P>0.05),arterial plasma and venous plasma potassium or sodium concentration were not significantly different(P>0.05); and arterial blood and venous plasma potassium concentration in a certain linear relationship existed.Conclusionarterial blood potassium concentration is not the same with venous plasma potassium concentration, but according to the experimental data, can roughly calculate the linear regression equation of venous plasma and arterial blood potassium ion concentrationvenous plasma potassium ion(A) =1.445×artery blood potassium ion(V)-1.273(mmol/L), so when the doctor know the potassium concentration in arterial blood,can roughly calculate the potassium concentration in venous plasma, the doctor can comprehensively judge the potassium situation in patient. Reference | Related Articles | Metrics

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Study Progress of Preparation Methods of Boron Nitride with High Specific Surface Area HU Kun-peng，YUAN Song-dong，LUO Yi，XIONG Kun Journal of Jianghan University(Natural Science Edition)    2013, 41 (1): 55-60.   Abstract （525）      PDF （447KB）（1777）       Knowledge map    Save Many researches on the preparation of mesoporous hexagonal boron nitride（h-BN）have been made in recent years. Some synthesis methods of h-BN with high specific surface area are introduced，mainly introduces water（solvent）heat-sealing method，template method，organic precursor process，chemical vapor deposition and so on. The characteristics of these methods and existing problems are pointed out. Moreover，the development prospect of these methods and the application prospect of h-BN with high specific surface area are presented. Related Articles | Metrics

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Acyclovir Ointment Application on Herpes Labialis HUA Min Journal of Jianghan University(Natural Science Edition)    2014, 42 (2): 73-74.   Abstract （547）      PDF （393KB）（1759）       Knowledge map    Save Objective To investigate the curative effect of acyclovir ointment on herpes labialis，to improve the cure rate and to reduce the duration of treatment. Methods In 105 cases of herpes labialis，randomly choosed 58 of them to be treated with acyclovir ointment，and the rest of 47 to be treated with cream of erythromycin. Compared the cure rates and the duration of treatment between these two groups. Results The group treated with acyclovir ointment：in 58 cases，55 of them were cured（94. 8% of total group），excellence was 3（5. 2%），positive and invalid were 0. The group treated with cream of erythromycin：in 47 cases，9 of them were cured（19. 1% of total group），excellence was 6（12. 8%），positive was 5（10. 6%）and invalid was 27（57. 4%）. Conclusion Compared with cream of erythromycin，acyclovir ointment is better for herpes labialis treatment. It′s easy to apply，and has a lighter side effect. It is worthy to be popularized. Related Articles | Metrics

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Journal of Jianghan University(Natural Science Edition)    2019, 47 (4): 290-292.   Abstract （398）      PDF （1127KB）（1706）       Knowledge map    Save Related Articles | Metrics

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Performance Parameters Caculation of Shock Tube and Results Analysis LV Zhi-guo, LI Guo-jun, LUO Yi-cheng, JIANG Hua, ZHAO Rong-juan Journal of Jianghan University(Natural Science Edition)    2011, 39 (2): 22-26.   Abstract （563）      PDF （1656KB）（1698）       Knowledge map    Save The calculation of the shock tube parameter by Excel is introduced, the work was done with one dimension inviscid simulation. In the calculation, the driver gases were H2, He, Ar and their mixtures, and the experimental gases were N2 and Ar. Additionally, the double diaphragm effect of the main diaphragm was considered, respectively obtained the operation parameters matching relationship, the best length ratio of driving section and driven section, the maximum test time under tailored interface condition.The study showed that, the parameter of the shock tube could be calculated by the software of Excel, the results could be shown in the designed table obviously, and they could be further processed to be a curve figure. The primary calculation results indicated that, compared to the ideal gas model, the shockwave was weaker and the test time was shorter with the real gas model. And the shockwave was strengthened by the diaphragm breaking with deflating gas between diaphragms. Reference | Related Articles | Metrics

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SAR Images Target Recognition Algorithm Based on Deep Learning Neural Network LIANG Xin，XU Hui Journal of Jianghan University(Natural Science Edition)    2016, 44 (2): 131-136.   DOI: 10.16389/j.cnki.cn42-1737/n.2016.02.006 Abstract （552）      PDF （2045KB）（1661）       Knowledge map    Save A new effective target recognition method for SAR images is proposed. First of all，take the improved enhanced Lee filtering and HOG transformation for feature extraction of SAR images，then through a hybrid neural network by cascading RBM and GRNN combination to operate object segmentation and target recognition of SAR images. Using MATLAB algorithm simulation of the test image database，in this paper，the method of object recognition based on the deep learning neural network algorithm can obviously increase the recognition rate，and accuracy reaches 97%. Related Articles | Metrics

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Hydrothermal Synthesis and Photocatalytic Properties of Beta-Bi2O3 Nano-sheets TIAN Yu，ZHANG Zhuang-zhuang，ZHU Xiao-long Journal of Jianghan University(Natural Science Edition)    2013, 41 (5): 44-47.   Abstract （472）      PDF （888KB）（1582）       Knowledge map    Save β-Bi2O3 nanosheets were synthesized by the hydrothermal method with Bi （NO3）3·5H2O and aquafortis as raw material，and added strong aqua ammonia as mineralizer. The materials were characterized by XRD and SEM，analysed the impact of experimental parameters on composition and morphology of the samples，and evaluated the photocatalytic performance of the sample.The results showed the β-Bi2O3 nano-sheets has high catalytic activity to methyl orange photocatalytic degradation. Related Articles | Metrics

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Analysis on Mechanism of Electro-plastic Effect and Its Prospect PENG Shu-hua，YANG Jun-jie，LI Yao Journal of Jianghan University(Natural Science Edition)    2013, 41 (2): 61-65.   Abstract （465）      PDF （596KB）（1566）       Knowledge map    Save Offers a comprehensive evaluation of the mechanism research of electro-plastic effect. Introduces the influence of electronic wind emerging from drift electron under application of electric field to the density，distribution，structure of movable dislocation，to the stacking fault energy and to the microstructure，and also makes a summary of the existing theoretical research of electro-plastic effect. At last，the prospect of electro-plastic effect and problems to be solved are analysed. Related Articles | Metrics

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Analysis and Enlightenment of Medical Education System in France LIU Yu-chen，LIANG Yong Journal of Jianghan University(Natural Science Edition)    2013, 41 (2): 107-112.   Abstract （635）      PDF （497KB）（1537）       Knowledge map    Save Introduces the general situation of French medical education，reveals the feature of staged education，detailed illustrates the curriculum provision. Combined with the education system of France，analyses the feature during its medical students training which are the focus on synthesis of theoretical courses，the integration of theoretical teaching and clinical practice，the arrangement of plentiful noviciate and the encouragement of autonomic learning. The training of medical students in France also has the advantages of national overall planning，value on general family medicine，continuous reform. At last，proposes the reference points our country can take during the medical students' education on the curriculum reform，the training model and the training system for resident physician. Related Articles | Metrics

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Stamping Die Design for Automobile Panel Based on Autoform FU Le-rong,WEN Shun,YUAN Chuang Journal of Jianghan University(Natural Science Edition)    2011, 39 (2): 43-46.   Abstract （295）      PDF （2401KB）（1525）       Knowledge map    Save Stamping process of an automobile cover part was analysed based on finite element simulating analysis aided by Autoform software, to make sure the reasonable parameters,the stamping process scheme,and designed the complete dies.Several sets of compound stamping dies, which employed cam driver and cam slide for stretch drawing, hole punching, trimming, flanging, sizing, etc., were completed. The quality of final products produced by these dies showed that the stamping process was feasible and the dies were reliable. Reference | Related Articles | Metrics

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Experimental Study on Friction and Wear Rate of Alumina Ceramics TONG Xing-sheng, ZHANG Jing Journal of Jianghan University(Natural Science Edition)    2011, 39 (2): 34-37.   Abstract （277）      PDF （1580KB）（1441）       Knowledge map    Save To take alumina ceramics as researching object, using experimental method, illustrates the preparation process of alumina ceramics, researches the influence factors to friction and wear feature of alumina ceramics including additive concentration, sintering temperature, loading weight, speed of rotation.The study results showed that the wear rate of ceramics was low. In industrial products, the ceramics as wear-resistant material has a good prospect. Reference | Related Articles | Metrics