Table of Content

25 September 2016, Volume 36 Issue 5

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Semi-analytic solution of the non-Fourier thermal propagation on the surface of material irradiated by laser beam

ZHANG Lijing,SHANG Xinchun

2016, 36(5):  449-454.  DOI: 10.3969/j.issn.1000-1565.2016.05.001

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The non-Fourier model of heat transfer as a laser pulse irritating on surface of material with large thermal relaxation time is considered.A new semi-analytic solution is derived by using Laplace,Hankel and their inverse transforms.By numerically simulating the solution,the wave form behavior of temperature can be seen clearly.

Analysis of surface subsidence rule for small clear distance tunnel’s shield construction in the soft soil layer

YU Li,NIU Xiaoyan,HE Jibin,GUO Wei

2016, 36(5):  455-461.  DOI: 10.3969/j.issn.1000-1565.2016.05.002

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In the soft soil layer,the analysis of the ground surface settlement in tunnel’s shield construction,it was of great significance to ensure the safe construction and control of ground settlement.Taking the soft soil layer of Suzhou Metro Line 4 as an example,according to the field condition and the monitoring section design,compared with the single hole and double hole construction of surface subsidence’s change law,the following conclusions were drawn: the influence of the tunnel construction of the second hole on the first hole was a process of extrusion,shearing and stretching,and surface subsidence were also increased or reduced;along with the second tunnel’s construction,the first hole’s vertical and lateral settlement of the ground surface increased first and then decreased;after the first hole construction,it formed a disturbance ring,so that the surface settlement of the second tunnel was always greater than the amount of the first hole settlement.

Photoluminescence enhancement effect of CH₃NH₃PbI₃ film

DANG Wei,LIU Xu,BAI Jingjing,ZHAO Jinjin,ZHANG Lianshui

2016, 36(5):  462-467.  DOI: 10.3969/j.issn.1000-1565.2016.05.003

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The photoluminescence enhancement of CH₃NH₃PbI₃ film and its effect on carrier recombination dynamics were studied by using photoluminescence spectroscopy.Experimental results demonstrate that the rate of photoluminescence enhancement is higher when the power density of light soaking increases.And oxygen atmosphere is helpful to photoluminescence enhancement of CH₃NH₃PbI₃ film.The reduction of defect density in the film is the main mechanism responsible for the photoluminescence enhancement.Furthermore,the effect of light soaking on the recombination dynamics of free carriers and shallow trapped carriers was analyzed by microwave absorption dielectric spectroscopy. Densities of free carriers and shallow trapped carriers in CH₃NH₃PbI₃ film show an obvious increase after the light soaking.

Research progress of amorphous to microcrystalline phase transition silicon thin film solar cell

FAN Shanshan,YANG Yanbin,YU Wei,FU Guangsheng

2016, 36(5):  468-473.  DOI: 10.3969/j.issn.1000-1565.2016.05.004

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The microstructure,optoelectronic property and the application in solar cell of Si films and SiGe alloy films near phase transition from amorphous to microcrystalline are outlined.The proto-crystalline Si films(proto-Si)with improved medium range order are grown at the amorphous phase side of the phase transition region,showing remarkable stability against light soaking.The high quality nano-crystalline Si films(nano-Si)with low defect density are grown just at the microcrystalline phase side of the phase transition region,showing high carrier mobility and higher long wavelength response due to the embedded Si nano-crystals.The triple-junction solar cell has achieved stable efficiency of 13.6% by using proto-Si,nano-Si and microcrystalline Si(uc-Si)as absorber layer.Increasing Ge content can further decrease the optical band gap of SiGe alloy film.By introducing SiGe alloy films as the absorber layer of sub-cell,the triple-junction stacked solar cell attains an initial cell efficiency of 16.3%,and the theoretical conversion efficiency of simulated quadruple junction solar cell can reach 20%.

Extraction and characterization of the lignin from rice straw by sulfuric acid

ZHANG Baoping,YANG Fang,MA Zhongchen,GUO Meichen,LIU Yun

2016, 36(5):  474-479.  DOI: 10.3969/j.issn.1000-1565.2016.05.005

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In this work,lignin was extracted from rice straw by sulfuric acid.The brown lignin was obtained through extraction by 72% H₂SO₄ for 2 h at room temperature and the ratio of liquid to solid was 15.The content of lignin in rice straw was 9.23%.The lignin was analyzed using scanning electron microscope(SEM),thermogravimetric analysis and differential scanning calorimetry(TG-DSC),Fourier transform infrared spectroscopy(FT-IR)and proton nuclear magnetic resonance(¹H-NMR).It was showen that the lignin was irregular block,its surface was rough and lacunaris,and it had a good thermal stability,and the decomposition temperature of lignin was between 175 ℃ and 700 ℃.It contained many functional groups like hydroxyl,carbonyl,ether linkage and benzene ring structure and was composed of p-hydroxyphenyl lignin,guaiacyl lignin and syringyl lignin.

Determination of vancomycin and QNs residues in chicken by graphene based-MSPE-liquid chromatography-high-resolution mass spectrometry

DONG Yanli,LIU Huimin,LI Chao,MA Jingjun,CUI Xiaona

2016, 36(5):  480-486.  DOI: 10.3969/j.issn.1000-1565.2016.05.006

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A method for the determination of vancomycin and quinolones residues in chicken was developed using liquid chromatography mass spectrometry(LC-MS).The sample was extracted with acetonitrile and purified using MSPE as the sorbent.The target compounds were separated on a Agilent ZORBAX SB-C18 column(3.0 mm×100 mm,1.8 μm)before submitting for detection by high-resolution mass spectrometry.The results showed that high correlation coefficients(r²>0.99)of the analyses were obtained within their respective linear ranges.The average recoveries and the relative standard deviations ranged from 71.2% to 98.8% and 6.8% to 14.3% respectively at the spiked levels of 5,10,25 μg/kg in chicken.This method is reliable,and suitable for the determination of vancomycin and quinolones residues in chicken.

Determination of 20 organochlorine pesticide residues in Panacis Japonici Rhizoma by gas chromatography

MA Yongqing,LI Xiaopan,KONG Yaping,YANG Huilong,LI Yali

2016, 36(5):  487-493.  DOI: 10.3969/j.issn.1000-1565.2016.05.007

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A method for the simultaneous determination of 20 organochlorine pesticide residues in Panacis Japonici Rhizoma was developed by gas chromatography with electronic capture detector.The samples were extracted by ultrasonic wave and purified by Florisil.The internal standard method was used in the quantitative analysis.The average recoveries of 3 standard addition levels were 68.21%~124.5%,with relative standard deviations less than 5.64%.The detection limits were 0.009 9~0.049 3 μg/kg.The method is rapid,sensitive and accurate,and it can be applied to the determination of 20 organochlorine pesticide residues in Panacis Japonici Rhizoma.

Stray current corrosion behavior of Q235 carbon steel grounding material

ZHU Liwei,YANG Bingkun,LIU Min,HU Jiaxiu,QIAN Zhouhai

2016, 36(5):  494-500.  DOI: 10.3969/j.issn.1000-1565.2016.05.008

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On the base of stray current corrosion(SCC)problems in the grounding grid service process,the corrosion behavior of Q235 carbon steel grounding material under simulation of AC or DC stray current interference conditions was studied by means of potential,current and corrosion weight loss measurement,and the corrosion morphology and products were characterized by SEM and XRD.The results showed that SCC had concentrated corrosion characteristics and the AC or DC SCC product layer was porous and had obvious crack,delamination and detachment,which implies its uselessness to protect the matrix.The corrosion products mainly consisted of Fe₃O₄ and Fe₂O₃.The results of weight loss measurement showed that the corrosion rate of Q235 steel was increased under AC or DC stay current interference conditions and the corrosion rate of DC SCC was about 18 times of AC SCC under the same current density.SCC- 2016年 河北大学学报(自然科学版) 2016第36卷 第5期 Journal of Hebei University(Natural Science Edition) Vol.36 No.5DOI:10.3969/j.issn.1000-1565.2016.05.008Q235扁钢接地材料杂散电流腐蚀行为研究祝郦伟¹,杨丙坤²,刘敏¹,胡家秀^2,3,钱洲亥¹(1.国网浙江省电力公司电力科学研究院,浙江 杭州 310006;2.中国科学院 金属研究所,辽宁 沈阳 110016;3.国家金属腐蚀控制工程技术研究中心,辽宁 沈阳 110016)摘 要:针对接地网服役过程中的杂散电流腐蚀问题,在模拟交、直流杂散电流干扰条件下,研究了Q235扁钢接地材料的腐蚀行为,利用扫描电镜(SEM)和X线衍射(XRD)等方法研究了材料的腐蚀形貌及腐蚀产物,分析了材料的电位、电流变化规律及腐蚀失重.结果表明:杂散电流腐蚀具有集中腐蚀特征,腐蚀产物层疏松多孔,有明显裂纹、分层、脱落现象,对基体不具有保护作用,腐蚀产物主要成分为Fe₃O₄和Fe₂O₃;失重测量结果显示,杂散电流存在时Q235扁钢腐蚀速率会大大增加,同等电流密度下,直流杂散电流腐蚀速率约为交流杂散电流的18倍;杂散电流腐蚀具有明显的电解腐蚀特征,电流流入金属构件部位成为阴极而受到保护,相反电流流出的部位成为阳极而受到腐蚀.关键词:Q235扁钢;杂散电流;腐蚀产物;腐蚀速率中图分类号:TG174 文献标志码:A 文章编号:1000-1565(2016)05-0494-07Stray current corrosion behavior of Q235carbon steel grounding materialZHU Liwei¹,YANG Bingkun²,LIU Min¹,HU Jiaxiu^2,3,QIAN Zhouhai¹(1.State Grid Zhejiang Province Electric Power Research Institute,Hangzhou 310006,China;2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;3.National Engineering Technical Research Center for Metal Corrosion Control,Shenyang 110016,China)Abstract: On the base of stray current corrosion(SCC)problems in the grounding grid service process,the corrosion behavior of Q235 carbon steel grounding material under simulation of AC or DC stray current interference conditions was studied by means of potential,current and corrosion weight loss measurement,and the corrosion morphology and products were characterized by SEM and XRD.The results showed that SCC had concentrated corrosion characteristics and the AC or DC SCC product layer was porous and had obvious crack,delamination and detachment,which implies its uselessness to protect the matrix.The corrosion products mainly consisted of Fe₃O₄ and Fe₂O₃.The results of weight loss measurement showed that the corrosion rate of Q235 steel was increased under AC or DC stay current interference conditions and the corrosion rate of DC SCC was about 18 times of AC SCC under the same current density.SCC- 收稿日期:2015-10-21 基金项目:国家自然科学基金重大项目(50499333);国家电网公司重点科技项目资助(5211DS120348) 第一作者:祝郦伟(1979—),男,浙江杭州人,国网浙江省电力公司电力科学研究院高级工程师,主要从事电力系统腐蚀与防护技术研究.E-mail:wwlyz@163.com 通信作者:杨丙坤(1988—),男,河北沧州人,中国科学院金属研究所在读硕士研究生,主要从事金属材料土壤腐蚀与防护技术研究.E-mail:bkyang13s@imr.ac.cn第5期祝郦伟等:Q235扁钢接地材料杂散电流腐蚀行为研究河北大学学报(自然科学版) 第36卷had obvious electrolytic corrosion characteristics.The area where current flowing into was protected as the cathode and the current outflow area was corroded as the anode.

Theoretical computation and analysis of the stability of urban ecological system network

MA Zhaipu,ZHANG Kaili,LI Shuaiqiang,WANG Huixin,WANG Mengmeng

2016, 36(5):  501-508.  DOI: 10.3969/j.issn.1000-1565.2016.05.009

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In order to calculate the stability of urban ecosystem network,the structural characteristics of urban ecological system network is first analyzed,and the idea of computing the network stability is proposed based on the network unit.Then,the standard network unit and the concrete calculation method of its stability are defined;also the calculation method of overall network is discussed.At last,an example of ideal ecological system network is simulated which shows that the calculation method is feasible,and the method is further applied to the actual calculation of the third-tier urban ecological system network and a reasonable result is obtained.

Effect of AM fungi,moisture,and phosphorus levels on the growth and quality of Salvia miltiorrhiza Bge.

QI Junxiang,YANG Xiaoyu,WANG Ziyue,DU Tianshu,LI Jianheng

2016, 36(5):  509-516.  DOI: 10.3969/j.issn.1000-1565.2016.05.010

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Pot experiments were conducted to study the effects of AM fungi on growth and quality of Salvia miltiorrhiza under different soil moisture and phosphorus levels.The plant height,root length,root shoot ration,total N,total P,tanshinone Ⅱ_A and polysaccharide were determinated to evaluate the quality of S.miltiorrhiza seedlings.The results showed that inoculation of AM fungi significantly increased the plant height,root length,root shoot ratio,total N,total P,tanshinone Ⅱ_A and polysaccharide content of S.miltiorrhiza under the same soil moisture and phosphorus level.Under the same soil moisture and different phosphorus levels,plant height,root length,root shoot ratio,total N,total P,tanshinone Ⅱ_A and polysaccharide content of S.miltiorrhiza increased first and then decreased with increasing phosphorus application rate,and they reached the maximum at second phosporus levels(P₂)was 0.15 g/kg.The content of total N,total P respectively was 1.842% and 0.354%.Under different soil moisture and the same phosphorus levels,tanshinone Ⅱ_A and polysaccharide of inoculated plants were significantly higher than non-inoculated plants.The content of tanshinone - 2016年 河北大学学报(自然科学版) 2016第36卷 第5期 Journal of Hebei University(Natural Science Edition) Vol.36 No.5DOI:10.3969/j.issn.1000-1565.2016.05.010AM真菌、水分和施磷水平对丹参生长及品质的影响齐俊香,杨晓宇,王紫月,杜天舒,李建恒(河北大学 药学院,河北 保定 071002)摘 要:利用盆栽实验考察不同水分和施磷水平下接种AM真菌对丹参幼苗生长及品质的影响.通过测定丹参生长量、全氮、全磷、丹参酮Ⅱ_A和丹参多糖的含量来研究丹参幼苗的生长及品质.结果发现,相同水分及施磷水平下,接菌株的株高、根长、根冠比、全氮、全磷、丹参酮Ⅱ_A和丹参多糖的含量显著高于未接菌株.相同水分不同施磷水平下,随施磷量的增加,丹参株高、根长、根冠比、全氮、全磷、丹参酮Ⅱ_A和丹参多糖的含量均先升高后下降,在第二施磷水平(P₂)为0.15 g/kg时达到最大,全氮和全磷质量分数最大分别为1.842%和0.354%.不同水分相同施磷水平下,接种株丹参酮Ⅱ_A和丹参多糖的含量显著高于未接菌株,70%田间持水量下丹参酮Ⅱ_A和丹参多糖含量较高.70%田间持水量及施磷质量分数为0.15 g/kg时接种株的丹参酮Ⅱ_A和丹参多糖质量分数最大,分别为0.252%和6.166%,较对照组分别提高0.016%和1.516%.关键词:AM真菌;丹参;磷;丹参酮Ⅱ_A;多糖中图分类号:R282.71 文献标志码:A 文章编号:1000-1565(2016)05-0509-08Effect of AM fungi,moisture,and phosphorus levelson the growth and quality of Salvia miltiorrhiza Bge. QI Junxiang,YANG Xiaoyu,WANG Ziyue,DU Tianshu,LI Jianheng(College of Pharmaceutical Sciences,Hebei University,Baoding 071002,China)Abstract: Pot experiments were conducted to study the effects of AM fungi on growth and quality of Salvia miltiorrhiza under different soil moisture and phosphorus levels.The plant height,root length,root shoot ration,total N,total P,tanshinone Ⅱ_A and polysaccharide were determinated to evaluate the quality of S.miltiorrhiza seedlings.The results showed that inoculation of AM fungi significantly increased the plant height,root length,root shoot ratio,total N,total P,tanshinone Ⅱ_A and polysaccharide content of S.miltiorrhiza under the same soil moisture and phosphorus level.Under the same soil moisture and different phosphorus levels,plant height,root length,root shoot ratio,total N,total P,tanshinone Ⅱ_A and polysaccharide content of S.miltiorrhiza increased first and then decreased with increasing phosphorus application rate,and they reached the maximum at second phosporus levels(P₂)was 0.15 g/kg.The content of total N,total P respectively was 1.842% and 0.354%.Under different soil moisture and the same phosphorus levels,tanshinone Ⅱ_A and polysaccharide of inoculated plants were significantly higher than non-inoculated plants.The content of tanshinone - 收稿日期:2015-10-25 基金项目:河北大学科研基金资助项目(3333112) 第一作者:齐俊香(1992—),女,河北衡水人,河北大学在读硕士研究生,主要从事天然植物有效成分研究.E-mail:714548328@qq.com 通信作者:李建恒(1964-),男,河北徐水人,河北大学药学院教授,博士,主要从事天然植物有效成分研究.E-mail:lijianheng@hbu.cn第5期齐俊香等:AM真菌、水分和施磷水平对丹参生长及品质的影响Ⅱ_A and polysaccharide was higher at 70% WHC.With at 70% WHC and phosphorus application rate of 0.15 g/kg they reached the maximum.The maximum content of tanshinone Ⅱ_A and polysaccharides respectively was 0.252% and 6.166%,which respectively increased 0.016% and 1.516% compared with the control group.

Separation and identification of acid proof yeast and its application in fermentation of waste fermenting grains

LI Yanqin,CUI Haihao,LI Chunqing,SONG Ruixue,CHEN Yajun

2016, 36(5):  517-523.  DOI: 10.3969/j.issn.1000-1565.2016.05.011

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The two yeaststrainsYP2 and YZ13 were isolated from Chinese-spirit fermenting grains and they could all grow well under the condition of pH 3.0.Strain YP2 was identified as belonging to Candida and the similarity degree of strain YP2 and Candida pseudolambica(KM384061.1)reached 98%,while strain YZ13 to Pichia and the similarity degree with Pichia kudriavzevii(LC014798.1)reached 100%.The two strains were mixed at the ratio of 1∶1 in weight and applied to the fermentation of waste fermenting grains.The process of solid state fermentation lasted for 60 hours under the condition of inoculation quantity 100 mL/kg,fresh fermenting grains 870 g/kg,wheat bran 100 g/kg,ammonia sulfate 15 g/kg,quicklime 15 g/kg,temperature 28 ℃.The results showed that the protein content of the dry sample of waste fermenting grains reached 172.30 g/kg and increased by 28.29% and it enriched feed protein of waste fermenting grains and provided foundation for waste fermenting grains and high efficiency feed.

Hypolipidemic and antioxidant effects of anthocyanins from black soybean skin

CHEN Ping,ZHANG Baoshi

2016, 36(5):  524-528.  DOI: 10.3969/j.issn.1000-1565.2016.05.012

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The hypolipidemic and antioxidant effects of anthocyanins from black soybean skin were studied.The results showed that the anthocyanins from purple sweet potato have inhibition of spleen index,liver index and can enhance heart index.The levels of serum lipids TC,TG,LDL-C,Apo B,atherosclerosis index and the content of MDA in liver were decreased.The serum HDL-C,Apo AI and the activity of SOD in liver were improved.Therefore,anthocyanins from black soybean skin have significantly hypolipidemic and antioxidant effects.

Terminal design of multi-parameter health detection based on the android audio interface

HAO Zhenming,LI Zhao,HAO Jinyuan,SU Jiao

2016, 36(5):  529-534.  DOI: 10.3969/j.issn.1000-1565.2016.05.013

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With the aggravating trend of aging population,the proportion of the population who are suffering sub-health and chronic disease increases.This situation seriously restricts the improvement of the harmonious society and the quality of peoples' life.However,the traditional medical resource shows some problems,such as uneven distribution and quality difference between urban and rural areas,this cannot meet people’s growing demand.In order to obtain health data,for example,pulse,temperature,blood oxygen,one multi-parameter health detection system is designed based on the android audio interface.This system adopts low power consu-mption Msp430 single clip microcomputer to collect the data of pulse,temperature,blood oxygen,etc.Then it codes the data follows a special amplitude communication protocol and transfers them to the mobile terminal through the android audio interface.Lastly,after the decoding,the data of pulse,temperature and blood oxygen could display on the mobile screen and achieves multi-parameter data detection,this design makes operation simple and fast,and it thus has practical value.

A prediction model of customer arrears based on hybrid Markov and Bayesian

WU Shuxia,CHEN Lian,GAO Shengbao

2016, 36(5):  535-540.  DOI: 10.3969/j.issn.1000-1565.2016.05.014

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In order to analyze the post-paid services with the characteristics of long term and on time pay,we put forward a prediction model based on hybrid Markov and Bayesian. It is based on the multi-factor information gain of all the customers,and computes the potential owe customers' probability of arrears.Moreover,it can provide comprehensive,objective and subtle decision information to the warning of customer arrears and disposal,and it can support differentiation treatment.First of all,we build the k-order Markov model based on the characteristics of the pay,then calculate the customers' initial probability.Secondly,we merge the customers' basic attributes,behavior feature and own information.Then,using the conditional mutual information and the hill climbing algorithm to generate the target Bayesian network to modify the initial probability of arrears,which form the final client own probability.Finally,through experiment by using the real data,we prove that this predict model is efficient in customer prediction.

On query mechanism of EPCIS based on cost function of cache replacement algorithms

KONG Dehan,QIU Xiaoli,LIU Yongshan

2016, 36(5):  541-546.  DOI: 10.3969/j.issn.1000-1565.2016.05.015

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With the increasing requests to the EPCIS for application in internet of things,we put forward a cache based query mechanism for EPCIS on the basis of exisiting query mechanism.The response time of query request can be shortened,when the counts of client application access to the EPCIS database is reduced.In addition,we also get a replacement algorithm based on cost function.The simulation experimental results show the proposed replacement algorithm has better performance than some other cache replacement algorithms which further improves the efficiency of the EPCIS query module.

An improved BP decoding algorithm of LDPC codes

ZHENG Wei,MA Xiaoyue,ZHAO Chengchen

2016, 36(5):  547-553.  DOI: 10.3969/j.issn.1000-1565.2016.05.016

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In BP decoding algorithm of LDPC codes decoding algorithm complexity is usually very high,more iterations is not conducive to the realization of hardware.We proposed an improved BP decoding algorithm.The improved decoding algorithm for real-time monitoring through three consecutive iterations is stable to reduce the number of iterations in the decoding when the SNR is below the threshold value,at the same time the variable message updates to check information transmission constraints.Simulation results demonstrate that the improved BP algorithm,in the case of almost no performance loss,can effectively reduce the complexity of decoding,thus more conducive to the realization of the hardware.

Interference-aware-based decode-and-forward relay selection algorithm for two-path relaying protocol

ZHANG Yu,DING Ling

2016, 36(5):  554-560.  DOI: 10.3969/j.issn.1000-1565.2016.05.017

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Spectral efficiency loss due to the half-duplex operated in relay nodes can be potentially improved by the two-path relaying(TPR)protocol.However,the mutual interference between the relay nodes can negatively affect the performance.Therefore,relay selection can be crucial to the system performance.In this paper,we propose a heuristic relay selection method for the decode-and-forward TPR strategy in order to maximize the transmission rate.Different from the existing relay selection methods,the inter-relay interference is considered.Meanwhile,the design principle of this method is based on not only the link conditions in current time slot,but also those of the relay node selected in previous time slot.Simulation results are conducted to verify the effectiveness of the proposed heuristic relay selection scheme.