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On String Stable Control of Platoon of Automated Vehicles with Predecessor-successor Information Framework

Chinese Journal of Mechanical Engineering 2010年第5期23卷 627-634页

作者： XIAO Lingyun GAO Feng School of Transportation Science and Engineering Beihang University Beijing 100191 China Defective product Administrative Center General Administration of Quality Supervision Inspection and Quarantine of China Beijing 100088 China

For the constant distance spacing policy,the existing researches of the string stability focus on the single-predecessor information framework（SPIF） and predecessor-successor information framework（PSIF）.The research results demonstrated that the string stability could not be guaranteed with the SPIF,and then the PSIF was proposed to resolve this string *** the issue,whether the string stability can be guaranteed when applying the PSIF,is still ***,most of the previous researches on the string stability were conducted without consideration of the parasitic time delays and *** this paper,the practical longitudinal vehicle dynamics model is built with consideration of the parasitic time delays and lags existing in the actuators,sensors or the communication ***,the detailed theoretical analysis of string stability in frequency domain is conducted to demonstrate that the classical linear control laws can not ensure the string stability when applying both the symmetrical PSIF（SPSIF） and asymmetrical PSIF（APSIF）.Thirdly,a control law,which adds the position and velocity information of the leading vehicle,is proposed to guarantee string stability for small/medium platoon,and the other control law,which adds the acceleration information of the controlled vehicle,is proposed to guarantee string stability for large platoon as well as small/medium ***,the comparative simulation is conducted to confirm the conducted analysis and the proposed control *** conducted research completes the means to analyze the string stability in frequency domain,provides the parameters＇ reference for the design and implementation of the practical automatic following controllers,and improves the reliability and stability of the platoon of automatic vehicles.

关键词： automatic vehicle following time delay control string stability information framework spacing policy automated vehicle intelligent transportation system

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Interaction Between Ustilaginoidea virens and Rice and Its Sustainable Control

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Rice science 2024年第3期31卷 269-284页

作者： ZHANG Fengmin CAO Zhenzhen ZHENG Xin HE Yuntao CHEN Mingxue LIN Xiaoyan Rice product quality inspection&supervision Testing Center of Ministry of Agriculture and Rural Affairs China National Rice Research InstituteHangzhou 310006China

Ustilaginoidea virens is a common rice pathogen that can easily lead to a decline in rice quality and the production of toxins pose potential risks to human *** this review,we present a comprehensive literature review of research since the discovery of rice false *** provide a comprehensive and,at times,critical overview of the main results and findings from related research,and propose future research ***,we delve into the interaction between *** and rice,including the regulation of transcription factors,the process of *** infecting rice panicles,and the plant immune response caused by rice *** that,we discuss the identification and characterization of mycotoxins produced by the pathogenic fungus,as well as strategies for disease *** emphasize the importance of comprehensive agricultural prevention and control methods for the sustainable management of *** knowledge will update our understanding of the interaction between *** and rice plants,offering a valuable perspective for those interested in ***.

关键词： rice false smut flower-specific infection mycotoxin food safety plant disease

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Optimization of Detection Methods for Avermectin Residue

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Animal Husbandry and Feed Science 2012年第1期4卷 10-12,15页

作者： PAN Yuan NIU Hua ZHANG Xue-zhong REN Yi Yunnan Provincial Institute of product quality supervision and inspection Kunming 650223China National Center for Tropical Agricultural product quality supervision&inspection Kunming 650223China

[ Objective] To develop an efficient and practical method for detecting avermectin residue in animal-derived food. [ Method ] Acetonitrile was used as the extraction fluid. After the removal of moisture, trifluoroacetic anhydride and N-methyl imidazole were used for derivatization and mixed well. After complete derivatization, high-performance liquid chromatography （HPLC） with C18 column was used for accurate qualitative and quantitative analysis of the detected substance using methanol aqueous solution （92： 8, V/ V）. [ Result] The detection limit of HPLC connected with a fluorescence detector was up to 0.1 ug/L. When the standard was added to the substrate at a final concentration in the range of 0.1 -20.0 lag/L, the recoveries were in the range of 80% -108% and the relative deviation was in the range of 4.1% -11.4%. [ Conclusion] The developed HPLC con- nected with a fluorescence detector is simple, practical, highly sensitive and resistant to interference, and it thus can meet the needs for determina- tion of biological toxin residues of avermectins in animal-derived food in laboratory.

关键词： Avermectin residues High-performance liquid chromatography Fluorescence detector

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Rheological properties of wormlike micelles formed in the sodium oleate/trisodium phosphate aqueous solution

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Chinese Chemical Letters 2008年第4期19卷 483-487页

作者： Yong Qiang Ji Wei Shan Wang Gan Zuo Li Li Qiang Zheng Key Laboratory of Colloid and Interface Chemistry Shandong UniversityMinistry of EducationJinan 250100China Shandong Institute of supervision ＆ inspection on product quality Jinan 250100China

Aqueous solution of anionic surfactant,sodium oleate（NaOA）,was studied by means of steady-state shear rheology and dynamic oscillatory *** system of NaOA/Na3PO4 showed high viscosity,strong viscoelasticity and good ability of countering Ca^2＋,Mg^2＋.The Maxwell model and Cole-Cole plot were applied to study the dynamic viscoelasticity of wormlike *** microstructures of the wormlike micelles were characterized by FF-TEM.

关键词： Wormlike micelles Rheology Sodium oleate Trisodium phosphate

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Comprehensive analysis of advanced glycation end-products in commonly consumed foods:presenting a database for dietary AGEs and associated exposure assessment

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Food Science and Human Wellness 2024年第4期13卷 1917-1928页

作者： Qiaozhi Zhang Huatao Li Ruixing Zheng Lili Cao Shufen Zhang Shuifeng Zhang Huadong Sheng Yuhao Jiang Yanbo Wang Linglin Fu Food Safety Key Laboratory of Zhejiang Province School of Food Science and BiotechnologyZhejiang Gongshang UniversityHangzhou 310018China Ningbo academy of product and Food quality inspection(Ningbo Fibre inspection Institute) Ningbo 315048China National Pre-packaged Food quality supervision and inspection Center(Zhejiang) Zhejiang Fangyuan Test Group Co.Ltd.Hangzhou 310018China

Advanced glycation end-products(AGEs)are a group of heterogeneous compounds formed in heatprocessed foods and are proven to be detrimental to human ***,there is no comprehensive database for AGEs in foods that covers the entire range of food categories,which limits the accurate risk assessment of dietary AGEs in human *** this study,we first established an isotope dilution UHPLCQq Q-MS/MS-based method for simultaneous quantification of 10 major AGEs in *** contents of these AGEs were detected in 334 foods covering all main groups consumed in Western and Chinese populations.Nε-Carboxymethyllysine,methylglyoxal-derived hydroimidazolone isomers,and glyoxal-derived hydroimidazolone-1 are predominant AGEs found in most *** amounts of AGEs were high in processed nuts,bakery products,and certain types of cereals and meats(>150 mg/kg),while low in dairy products,vegetables,fruits,and beverages(<40 mg/kg).Assessment of estimated daily intake implied that the contribution of food groups to daily AGE intake varied a lot under different eating patterns,and selection of high-AGE foods leads to up to a 2.7-fold higher intake of AGEs through daily *** presented AGE database allows accurate assessment of dietary exposure to these glycotoxins to explore their physiological impacts on human health.

关键词： Advanced glycation end-products Maillard reaction Processed foods Dietary database Exposure assessment

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Effects of Exogenousα-Ketoglutaric Acid on 2-Acetyl-1-Pyrroline,Yield Formation and Grain quality Characters of Aromatic Rice

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Phyton-International Journal of Experimental Botany 2021年第2期90卷 437-447页

作者： Bin Du Qixia Wu Shuochen Jiang Dingyue Zhang Yue Qiao Yimei Xie Jianlong Xu Jianqiang Zhu College of Agriculture Yangtze UniversityJingzhou434023China National Selenium-Rich product quality supervision and inspection Center Enshi434023China Institute of Crop Science Chinese Academy of Agricultural SciencesBeijing100081China

The improvement of grain quality in aromatic rice is very important for farmer to increase their *** study was conducted with a two-year field experiment and three aromatic rice cultivars in order to study the effects of exogenousα-ketoglutaric acid on yield formation,grain quality characters and the biosynthesis of 2-acetyl-1-pyrroline(2-AP,key component of aromatic rice’s fragrance)in aromatic *** heading stage,0.50 mmol L^(-1)(T1)and 1.00 mmol L^(-1)(T2)α-ketoglutaric acid solutions were overhead sprinkle to aromatic rice plants,respectively while the treatment which was overhead sprinkled with distilled water was set as control(CK).The results showed that 17.34%-33.04%and 21.39%-34.74%higher grain 2-AP contents were recorded in T1 and T2 treatments,*** with CK,T1 and T2 treatments significantly reduced the transcript level of gene BADH2 which is related to the 2-AP biosynthesis in aromatic rice.3.86%-7.51%higher grain protein contents and 1.15%-3.37%higher head rice rates were also recorded inα-ketoglutaric acid treatments than ***,T1 and T2 treatments remarkably decreased the chalky rice rate,chalkiness and grain amylose ***,there was no remarkable difference in grain yield and related trails(effective panicle number,grain number per panicle,seed-setting rate and 1000-grain weight)among CK,T1 and T2 *** conclusion,application of exogenousα-ketoglutaric acid enhanced 2-AP biosynthesis and improved grain quality of aromatic rice.

关键词： α-ketoglutaric acid aromatic rice chalkiness protein 2-acetyl-1-pyrroline

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Synthesis, Characterization and Gas Sensing Properties of In(OH)_3 and In_2O_3 Nanorods through Carbon Spheres Template Method

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Journal of Materials Science & Technology 2012年第5期28卷 396-400页

作者： Xifeng Lu Lei Zhang Hui Zhao Kai Yan Yan Cao Lumin Meng Lunan Institute of Coal Chemical Engineering Jining 272000China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004China Jining Institute of supervision and inspection on product quality Jining 272000China

Poly-crystalline In（OH） 3 nanorods have been successfully prepared via a urea-based precipitation using the colloidal carbon spheres as the templates. After calcinations, the resulted In 2 O 3 nanorods with poly-crystalline structure were fabricated. Structure and morphology of the product were characterized by X-ray diffraction （XRD）, and transmission electron microscopy （TEM）. The possible formation process was schemed. The sensor gas properties towards C 2 H 5 OH and CO were examined.

关键词： Nanostructures Self-assembly Characterization Gas sensor

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Preparation of microencapsulatedα-olefin drag reducing polymer used in oil pipeline transportation

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Petroleum Science 2011年第1期8卷 99-107页

作者： Li Bing Xing Wenguo Dong Guilin Chen Xiangjun Zhou Ningning Qin Zhanbo Zhang Changqiao School of Chemistry and Chemical Engineering Shandong UniversityShandong 250061China Linyi Institute of product quality supervision and inspection Shandong 276004China Shandong Institute of Metrology Shandong 250014China Shandong quality Certification Centre Shandong 250014China

Microcapsules containing oil drag-reducing polymer particles were prepared by melting-scattering and condensing of polyethylene wax,in-situ polymerization of urea and formaldehyde,and interfacial polymerization of styrene *** related processes were studied by a molecular dynamics simulation method,and molecular design of microcapsule isolation agent was carried out on the basis of the *** technologies for preparing microencapsulated oil drag-reducing polymer particles were compared and the circulation drag reducing efficiency of the microencapsulated polymer particles was evaluated based on the characterization results and their dissolution *** design of a microcapsule isolation agent suggests that a-olefin polymer particles can be stably dispersed in water by using long-chain alkyl sodium salt surfactant which can prevent the agglomeration ofα-olefin polymer *** results of simulation of the adsorption process shows that the amount of alkyl sodium salt surfactant can directly affect the stability of microencapsulatedα-olefin polymer particles, and there must be a minimum critical amount of *** characterization of the morphology by Scanning Electron Microscopy（SEM） and comparison of the static pressure stability,especially the conditions of reaction and technological control of microcapsules with different shell materials,microencapsulation of a-olefin polymer particles with poly-（urea-formaldehyde） as shell material was selected as the optimum scheme,because it can react under mild conditions and its technological process can be controlled in a large *** relationship of drag reducing rate and dissolving time of microcapsules showed that the formation of microcapsules did not affect the maximum drag reducing rate,and the drag reducing rate of each sample can reach about 35%along with the dissolving time,*** did not affect the drag reducing property ofα-olefin polymer.

关键词： α-olefin polymer molecular design coating material microcapsule preparation stability and solubility drag reducing property

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A tunable lighting system integrated by inorganic and transparent organic light-emitting diodes

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Optoelectronics Letters 2014年第3期10卷 198-201页

作者：张晶晶张涛金亚方刘石神袁士东崔钊张立王伟辉 Shanghai Institute of Technical Physics Chinese Academy of Sciences National Center for quality inspection & supervision of LED product Changzhou Institute of Opto-Electronic Technology School of Electronic and Optical Engineering Nanjing University of Science and Technology

A tunable surface-emitting integrated lighting system is constructed using a combination of inorganic light-emitting diodes(LEDs) and transparent organic LEDs(OLEDs).An RB two-color LED is used to supply red and blue light emission,and a green organic LED is used to supply green light *** of the LED and OLED are tuned to produce a white color,showing different Commission Internationale d'Eclairage(CIE) chromaticity coordinates and correlated color temperatures with a wide adjustable *** an integration can compensate for the lack of the LED's luminance uniformity and the transparent OLED's luminance intensity.

关键词：有机发光二极管照明系统集成可调无机国际照明委员会 OLED 亮度均匀性

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Dry matter production and panicle characteristics of high yield and good taste indica hybrid rice varieties

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Journal of Integrative Agriculture 2023年第5期22卷 1338-1350页

作者： LI Min ZHU Da-wei JIANG Ming-jin LUO De-qiang JIANG Xue-hai JI Guang-mei LI Li-jiang ZHOU Wei-jia Rice Research Institute Guizhou Academy of Agricultural SciencesGuiyang 550006P.R.China Rice product quality supervision and inspection Center Ministry of Agriculture and Rural AffairsChina National Rice Research InstituteHangzhou 310006P.R.China

Indica hybrid rice(Oryza sativa) production aims to achieve two crucial targets: high yield and good taste. This study selected three types of indica hybrid rice according to grain yield and taste value, including high yield and good taste(HYGT), low yield and good taste(LYGT), and high yield and poor taste(HYPT), to analyze yield components,corresponding growth characteristics, and rice taste quality. When values were averaged across varieties and years,there were almost no differences in taste value between HYGT and LYGT;HYGT showed a significant increase in yield,owing to a higher number of panicles and spikelets per panicle, with a respective increment of 16.2 and 20.6%. The higher grain yield of HYGT compared with LYGT was attributed to three key factors: a higher leaf area index(LAI) during heading, a higher ratio of grain to leaf, and a higher biomass accumulation at maturity. HYGT and HYPT achieved similar high yields;however, HYGT had more panicle numbers and lower grain weight. In addition, HYGT showed a significantly higher taste value than HYPT, attributed to its significantly lower protein and amylose contents, with reductions of 8.8and 15.7%, respectively. Lower protein and amylose contents might be caused by a proper matter translocation from vegetative organs to panicle. This study suggested that reasonable panicle characteristics and translocation efficiency from vegetative organs to panicle during heading to maturity are the key factors in balancing yield and rice taste *** results will provide valuable insights for rice breeders to improve the grain yield and quality of indica hybrid rice.

关键词： indica hybrid rice grain yield taste quality growth characteristics

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