Shandong Science

Research on extremum detection and filtering algorithm of weak light signal

ZHANG Xiao-nan,CHEN Jie, GAO Hao, CAI Yu-long, LIU Jie, LI Zheng-bao

SHANDONG SCIENCE. 2018, 31(1): 1. doi:10.3976/j.issn.1002-4026.2018.01.001

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In order to effectively improve the accuracy of extreme value detection of weak photoelectric signal, through the analysis of the change rules of signals measured, a filtering algorithm for the extremum detection of the target signals with high precision was proposed, and the solutions to the signal detection under ideal conditions and strong interference conditions were also discussed. Firstly, in this algorithm, an improved dynamic threshold method was used to obtain the initial extremum data. Then the acquisition value was filtered by the combination of two kinds of filtering method, which were the median absolute deviation based moving filtering and the weighted average filtering. Finally, the extreme value of the signal was obtained. The test results show that the measurement results of the algorithm are consistent with the actual value, the minimum average relative error is controlled at about 0.1%, which meets the accuracy requirement. The accuracy and stability of this algorithm are higher than those of the traditional method. The research provides a certain reference for the high accurate measurement of peak and trough values of weak signals with different waveform.

Design of remote monitoring system for ocean vessel refueling measurement

ZHANG Hao, JIANG Shang-jie, WANG Bin, HAO Zhu, XIN Ke-liang

SHANDONG SCIENCE. 2018, 31(1): 10. doi:10.3976/j.issn.1002-4026.2018.01.002

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In order to monitor the overall fuel consumption of ocean vessel in real time, a fuel consumption monitoring system was designed, which was based on flow collection, RTU remote transmission terminal and GPRS DTU technology. Firstly, the system was installed in the fuel filler to carry out measurement and monitoring, and ZigBee wireless communication technology was used to complete the wireless short distance transmission of data in realtime. Then RTU terminal was applied to collect and process data, and to control the output. Finally GPRS DTU module was employed to convey small amount of data to the shorebased platform in realtime. The practical application indicates that the system not only ensures the accuracy and realtime of fuel consumption information, but also can reduce the cost.

Preparation of certified reference materials of hesperetin

SONG Xiang-yun, LIU Jin-yu, GENG Yan-ling, LIN Yun-liang, FU Rui-ming, CUI Li, WANG Dai-jie

SHANDONG SCIENCE. 2018, 31(1): 16. doi:10.3976/j.issn.1002-4026.2018.01.003

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A method for the preparation of the certified reference material (CRM) of hesperetin was established in this article. Hesperetin sample was obtained by means of silica gel chromatography combined with preparative HPLC technique, and its structure was characterized by UV, IR, MS and NMR. At the same time, the TLC identification and thermogravimetric analysis were carried out, and the sample was divided into bottles for further homogeneity test, stability test, and the cooperative certification by 8 laboratories. The results indicated that hesperetin samples had good homogeneity, with good stability within 12 months at 0~4 ℃. The certified value of the reference material of hesperetin was 98.78%, with the expanded uncertainty of 0.26% in confidence coefficient of 95%. The standard sample of hesperetin has reached the technical requirements of the national certified reference material. The CRM has traceability and can be used in the content determination, testing method validation, as well as t quality control of hesperetin and related products.

Optimization of water extraction process for Tonglishu Granule by orthogonal experiment

YANG Long-fei,DING Xiao-yan,GAO Yan,GUO Jin,SUN Qi-hui,ZHAO Bo-nian

SHANDONG SCIENCE. 2018, 31(1): 23-29. doi:10.3976/j.issn.1002-4026.2018.01.004

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Based on the orthogonal design, parameters of the water extraction process of Tonglishu Granule were optimized by using gardenin content, peoniflorin content and the extract yield as the index. The experimental results showed that the optimal conditions for water extraction were as follows: eight times of water, extracting two hours and three times. The optimal extraction technology was reasonable and feasible, and the extraction efficiency was high, which could be used as the water extraction technology for Tonglishu Granule, and suitable for industrial producion.

Study on pharmacognostic identification of Bidens procera L.C.Xu ex X.W.Zheng

ZHENG Xiao-wen,BING Shuai,LIU Zheng,CHEN Wen-hua,TAN Hui-ying,XU Ling-chuan

SHANDONG SCIENCE. 2018, 31(1): 30. doi:10.3976/j.issn.1002-4026.2018.01.005

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The methods of molecular identification, morphology identification and microscopical identification were used to study the pharmacognosy of Bidens procera L.C.Xu ex X.W.Zheng. By determination of the ITS sequence of DNA, Bidens procera L.C.Xu ex X.W.Zheng was confirmed as Bidens L.. And the morphology and the microscopic identification of its stems and leaves were described and recorded in detail. The method established in this study will provide a reference for the identification and development control of Bidens procera L.C.Xu ex X.W.Zheng.

Study on the control of tomato rootknot nematode with Bacillus cereus BCJB01 Powder

WANG Yi-lian, LIU Bao-jun, LI Ling, HU Jin-dong, LI Ji-shun, ZHANG Wei, LU De-peng

SHANDONG SCIENCE. 2018, 31(1): 36. doi:10.3976/j.issn.1002-4026.2018.01.006

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In order to improve the field control effect of Bacillus cereus BCJB01 pulvis on rootknot nematode in vegetables, a field study on the control of tomato rootknot nematode disease by Bacillus cereus BCJB01 was carried out by the way of adding nutrient matrix and organic fertilizer. The results showed that adding organic fertilizer and nutrient matrix at the same time when cultivating land was the best method to control tomato rootknot nematode. The control effect was up to 77.45%, which was superior to that of 10% thiazone granule.

Field trial of Burkholderia vietnamiensis and its composite microbial flora on cucumber rootknot nematode

WANG Yi-Lian,WANG Zhen-Wei, LIU Bao-Jun, PAN Ming, LI Ji-Shun

SHANDONG SCIENCE. 2018, 31(1): 39. doi:10.3976/j.issn.1002-4026.2018.01.007

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In order to improve the control effect of Burkholderia vietnamiensis and its composite microbial flora on rootknot nematode in vegetables, taking the cucumber rootknot nematode as the research object, we adopted the way of adding nutrient matrix, biobacteria fertilizer and microbial antimicrobial agents when cultivating land, and fertilizing microbial antimicrobial agents when transplanting, carried out research for application technology on Burkholderia vietnamiensis B418 and its combinations with Bacillus cereus BCJB01, Trichoderma spp.LTR-2 and T11-W. The results showed that the addition of nutrient substrate when cultivating land could significantly improve the control effect of B418 to rootknot nematode. In the treatment of composite microbial flora, the treatment of cucumber rootknot nematode by adding bio-bacteria fertilizer and nutrient matrix at the same time when cultivating land was better than that of single nutrition matrix or bio-fertilizer. B418 single agent add nutrient matrix treatment was superior to its composite microbial flora add nutrition matrix treatment, whose field control effectiveness was 90.05%.

Study on Raman spectra of two dimensional layered SnSe₂ nanomaterial with different layers

SHI Ying, MA Xiao-fei, YANG Xiu-juan, LI Yue-ling, LIU Mei

SHANDONG SCIENCE. 2018, 31(1): 43. doi:10.3976/j.issn.1002-4026.2018.01.008

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In this paper, the Raman spectra of SnSe₂ materials with different layers were measured. The relationship between the change of Raman peak intensities and positions in different vibrational modes and the corresponding SnSe₂ samples with different thickness was obtained, and the reasons for the change were further analyzed. This research can provide a more systematic, accurate and rapid method for judging two dimensional SnSe₂ materials.

Study on equilibrium phase transformation and microstructure of TiAl-Nb alloy

FANG Chun-mei, XU Yong, XU Bin, YUAN Nai-qiang

SHANDONG SCIENCE. 2018, 31(1): 48. doi:10.3976/j.issn.1002-4026.2018.01.009

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The phase composition and microstucture characteristics of Ti-Al and Ti-Al-Nb alloys were analyzed by qualitative and quantitative X-ray diffraction and optical micrscopic methods. The effects of Nb addition in Ti-Al alloys on phase composition of Ti-Al-Nb alloy, grain size and distribution were also investigated. It was found that Nb addition could dramatically improve the stability of β and α₂ phases, while the precipitation of α and γ phases was hindered as Nb addition. Meanwhile, the area of α₂+γ two-phase region was enlarged, and the γ phase region was made to shift to the right. Furthermore, the grain size of Ti-Al-Nb alloys was significantly refinded by Nb addition within a specific composition range.

Application of biosensors in corn enzymatic steeping technology

LIU Qing-ai，MA Heng，MA Yao-hong，YANG Jun-hui，MENG Qing-jun，YANG Yan，SHI Jian-guo

SHANDONG SCIENCE. 2018, 31(1): 55. doi:10.3976/j.issn.1002-4026.2018.01.010

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In order to control the biochemical parameters of the corn enzymatic steeping process, biosensor was used to timely detect the lactic acid, glucose and reducing sugar during corn soaking process, and this method was also compared with titration, iodimetry and fehling's reagent. The results showed that there was little difference between the test results of biosensor and those of the traditional methods, but biosensor had many advantages, such as quick response, accurate result and low cost, and samples could be directly determined without complex pretreatment.

Determination of aflatoxin B1 content in corn by enzyme electrode method

ZHANG Jin-ling, DU Yi, GAO Guang-heng, ZHAO Xiao-hua, ZHANG Li-qun, ZHU Si-rong,SHI Jian-guo,BI Chun-yuan

SHANDONG SCIENCE. 2018, 31(1): 60. doi:10.3976/j.issn.1002-4026.2018.01.011

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The redox reaction will occur when aflatoxin contacts with its oxidase, which can produce hydrogen peroxide and other products. In this research, the method of enzyme electrode biosensors was used to immobilize aflatoxin oxidase on cellulose acetate carrier membrane and prepare electrochemical enzyme electrode. Aflatoxin oxidase electrode was installed on the SBA flow injection analysis instrument to detect the content of aflatoxin. The results showed that the toxin enzyme electrode had good response characteristics to aflatoxin, the precision (RSD) was up to 1.20% (n=10), the linear range was 0 ~100 μg/L (R2 =0.999 6), and the recovery rate was 96%~102.4%. Therefore, the enzyme electrode analysis method established in this study can be used for the detection of aflatoxin B1 in maize.

Research on the daytoday evolution model for traffic flow based on reference point

LOU Lu,SUN Hui-jun

SHANDONG SCIENCE. 2018, 31(1): 65. doi:10.3976/j.issn.1002-4026.2018.01.012

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This paper built a day-to-day evolution model based on reference point, which reflected the influence of travelers' feelings on the estimated travel time and route choice by comparing real travel time with reference point. In the estimated time model, the different attitudes towards loss and gain that travelers hold were reflected by different value of parameters. Three cases of travelers' attitudes,which were optimistic,pessimistic and neutral behaviors,are discussed to analyze the influence on evolution process and total travel time. The evolution results indicated that total travel time was maximum when travelers were pessimistic and total travel time was minimum when travelers were optimistic. This research helps to understand the essential laws of urban traffic flow evolution.

Passenger individual route choice model for urban rail transit based on traffic smart card data

WANG Sha-sha, SUN Hui-jun

SHANDONG SCIENCE. 2018, 31(1): 72. doi:10.3976/j.issn.1002-4026.2018.01.013

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Based on the analysis of the components of passenger travel time in urban rail transit, a traffic smart card data based model for personal route choice was proposed in this paper, which overcame the disadvantages of traditional path selection models only taking route selection for group into account. Firstly, by analyzing the characteristics of rail transit trip using smart card, the travel time model was established, the travel time factors were confirmed, and their independence was analyzed. Then, travel factors were estimated, the route travel time was calculated, and the personal travel route choice model was proposed. Finally, taking the Beijing metro network as a case, the personal route choice was analyzed, and the effectiveness of the model was verified by the actual data.

Passenger flow forecast of Zhengzhou-Jiaozuo intercity bus based on traffic travel behavior

FENG Xiao-yan，ZHANG Ya-wei

SHANDONG SCIENCE. 2018, 31(1): 79. doi:10.3976/j.issn.1002-4026.2018.01.014

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In this paper, through statistical analysis of the personal attributes and travel information of ZhengzhouJiaozuo intercity bus passengers, the grey model was chosen for modeling, predicting, and precision detecting of the passenger flow. The average relative error of the model was 3.98% and the precision was 96.02%, which met the accuracy requirement well. The research offers a theoretical basis and technical support for optimizing the organization of ZhengzhouJiaozuo intercity bus.

Effects of land use changes on ecosystem services value in Yanzhou mining area

Lü Xin-yi, WANG Hui, YUAN Xing-zhong, SUN Xiao-yin, SUN Xiao-fang, SUN Jin-fang

SHANDONG SCIENCE. 2018, 31(1): 88. doi:10.3976/j.issn.1002-4026.2018.01.015

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In this study, the land use changes during 1994—2013 in Yanzhou mining area were inversed and analyzed based on the remote sensing (RS) and geographic information system (GIS) technology. The theory of ecosystem service value (ESV) was used to evaluate the change of ecosystem services value in mining area. Meanwhile, according to the land use structure, the change of ecosystem service value and its driving factors were analyzed. The results showed that in the study area during 1994—2013, the annual growth rate of the water area was the highest, up to 10.31%, followed by the construction land and the woodland, which were 8.46% and 3.06% respectively. The annual change rate of cultivated land decreased by -1.85%, which was transformed into water and construction land. The ecosystem service value assessment showed that the total value of the study region increased by 203 million yuan, mainly due to the transfer of woodland and the transformation from cultivated land to water area caused by coal mining subsidence. Due to the reduction of cultivated land, the value of food production function decreased, while the value of other functions related to the wetland all increased. The results of this research can provide reference for the treatment of the coal mining subsidence wetland in mining area.

Dynamic evaluation of resources utilization pressure in Shandong Province based on material flow analysis

JI Xiao-mei, SHI Feng, ZHOU Ai-wen, FAN Lin

SHANDONG SCIENCE. 2018, 31(1): 96. doi:10.3976/j.issn.1002-4026.2018.01.016

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For measuring the sustainable status of resources utilization in Shandong Province from the perspective of pressure, the data of material input, output and consumption in Shandong Province during 2005—2014 were analyzed and processed based on the material flow method. Furthermore, the total amount pressure, formation pressure and growth pressure of resource utilization in Shandong Province were measured, the compound pressure was obtained by weighting, and the characteristics of pressure changes were discussed. Results indicate that: for Shandong Province, the resource utilization pressure shows an increase trend, and the emphasis of pressure regulation is put on the total amount of resource utilization and the growth engine; resource factors have an important influence on economic development of the whole province, and the economic development mode based on resource consumption still need to be changed; the economic factors play a leading role in the change of resource utilization in the whole province, followed by the effects of technology and population, and the effect of technical factor has been constantly strengthened.

PI-Strong L^U abundant semigroups

HAN Ru-yue, LI Gang

SHANDONG SCIENCE. 2018, 31(1): 103. doi:10.3976/j.issn.1002-4026.2018.01.017

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Through the depiction of C- L^U abundant semigroups, two structure theorems of PI-strong L^U abundant semigroups were given.

Research on the evaluation of innovation ability of 17 cities in Shandong Province

GUO Meng-ying，JIA Xin-xin，ZHU Wen

SHANDONG SCIENCE. 2018, 31(1): 110. doi:10.3976/j.issn.1002-4026.2018.01.018

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City is the main area that gathers innovation subject and innovation resources, and its innovation ability has become the key factor to determine the comparative advantage of the region. In this paper, the evaluation index system of regional innovation capability in Shandong Province was established by using the method of multi index comprehensive evaluation and the characteristics of Shandong Province. The innovation capability of 17 cities in Shandong Province was evaluated from three aspects: innovation strength, innovation potential and innovation comprehensive strength. Results showed that the technological innovation capability in the eastern part of Shandong Province was still in the leading level, the development in the central region was stable, and the foundation of innovation in the west was weak, but its development potential was great. At last, the relevant countermeasures and suggestions were put forward to improve the innovation capacity of each city.

Manifold-regularized co-training model for behavior recognition

LIU Xiang-yang, LI Yang, JIANG Shu-ming，WANG Shuai

SHANDONG SCIENCE. 2018, 31(1): 116. doi:10.3976/j.issn.1002-4026.2018.01.019

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In this paper, a novel semi-supervised learning algorithm named Laplacian-regularized co-training(LapCo) was proposed. This method introduced Laplacian regularization to co-training model, and a large number of unlabeled sample data were used to train two classifiers from different view data, which could exchange unknown information between the two and update classifier to improve the recognition accuracy. In order to verify the effectiveness of the proposed algorithm, a large number of experiments were done on the action dataset UCF-iphone. The experimental results show that our proposed Laplacianregularized co-training model can effectively improve the accuracy of behavior recognition.

Research and development of medicalrowing machine based on STM32

HOU Yan-jin, TIAN Han-mei, TENG Jing-zheng, ZHANG Xin-li, XU Min

SHANDONG SCIENCE. 2018, 31(1): 121. doi:10.3976/j.issn.1002-4026.2018.01.020

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Inoculation separation is a widely used operation in medicine, whose use of manual operation is timeconsuming and easy to infect the medical staff. In order to achieve high efficiency, accuracy and automation, a type of automatic control system with ARM series STM32F407 chip as the core was designed, which was equipped with corresponding sensors and actuators. This system could control the action of each executing part in the medical rowing machine, and exchange data with external scanners, RFID card reader, touch screen and the PC to implement such functions as sample collection, germ culture, collection and storage of experimental data and fee deduction authorization. The machine could take the place of traditional manual operation, truly realize aseptic operation, reduce the probability of virus infection among medical staff, and fill the gap of current domestic technology. The result of the testing has been accepted by hospitals, and now the machine is getting into small scale production.

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