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Adaptive Coordinated Control for Hot Strip Finishing Mills

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Journal of Iron and Steel Research International 2011年第4期18卷 36-43页

作者： JIAO Xiao-hong shao li-ping PENG Yan Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 Hebei China Institute of Mechanical Engineering Yanshan University Qinhuangclao 066004 Hebei China

To further improve the control accuracy for strip dimension of hot strip mills,an adaptive control scheme is investigated for a hot strip finishing mill based on the decentralization and coordination among the controllers of gauge,tension and ***,the adaptive controller designed can regulate simultaneously the strip exit thickness,the strip tension and the looper angle to ensure better performance of the strip quality of finishing ***,the control scheme is proposed in consideration of the essential nonlinearity and the unavoidable friction phenomena in the mechanical system,so the controller can be efficient in a wider range of working *** simulation results of a model obtained from a real hot strip finishing mill show the effectiveness of the proposed control scheme in comparison with the conventional control method.

关键词： hot strip finishing mills exist gauge tension looper angle adaptive control

Off-farm employment and poverty alleviation in rural China

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Journal of Integrative Agriculture 2021年第4期20卷 943-952页

作者： li shao-ping DONG Yong-qing ZHANG lin-xiu liU Cheng-fang China Center for Agricultural Policy School of Advanced Agricultural SciencesPeking UniversityBeijing 100871P.R.China College of Management and Economics/Center for Social Science Survey and Data Tianjin UniversityTianjin 300072P.R.China UN Environment Programme-International Ecosystem Management Partnership Beijing 100101P.R.China Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101P.R.China

Two phenomena in the history of China's economic growth during the last four decades are the increase in the share of offfarm employment and the progress in poverty alleviation in rural *** both of them have been well documented in the literature,less is known about the linkage between the *** better understand the role that off-farm employment has played in poverty alleviation in rural China is critically important not only for China but also for those countries that are trying to reduce ***,we examine the impact of off-farm employment on poverty alleviation in rural *** the data from two nationally representative household panel surveys(China National Rural Survey and China Rural Development Survey),this paper provides supporting evidence that off-farm employment contributes to poverty alleviation in rural ***,if household participation in off-farm employment increases by 10 percentage points,the likelihood for a nonpoor household to fall into poverty will decrease by 0.88 percentage point whereas the likelihood for a poor household to climb out of poverty will increase by 3.5 percentage *** a word,off-employment can not only prevent rural residents to fall into poverty but also help those already in poverty climb out of it.

关键词： off-farm employment poverty alleviation rural China

Morphogenesis and Molecular Phylogeny of a Marine Urostylid Ciliate Apokeronopsis wrighti(Protista, Ciliophora, Hypotrichia)

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Journal of Ocean University of China 2024年第4期23卷 1067-1075页

作者： liAN Chunyu li ping ZHANG Tengteng shao Chen Department of Zoology College of Life SciencesShaanxi Normal UniversityXi’an 710119China Powerchina Northwest Engineering Corporation limited Xi’an 710065China

Hypotrichs are one of the highly differentiated ciliated lineages which play important roles in ecological, environmental,evolutionary and basic biological studies. In the present study, we investigated the living characteristics, infraciliature, nuclear apparatus, ontogenesis and phylogenetic position of a marine hypotrichous ciliate, Apokeronopsis wrighti Long et al., 2008, which was isolated from coastal waters in Shenzhen, China. The new isolate resembles the type population in terms of morphological characteristics, morphometrics, and SSU rRNA gene sequence that is with a 99.7% similarity. Ontogenesis of A. wrighti is characterized by oral primordium for the proter as well as marginal and dorsal kineties anlagen in both filial products formed de novo, and the cirral row arranged along the paroral and endoral arises from several anterior frontoventral-transverse cirral streaks. Phylogenetic analyses based on SSU and concatenated gene data suggest that five species of Apokeronopsis form a monophyletic clade, and the genus Apokeronopsis is closely related to Thigmokeronopsis and Metaurostylopsis.

关键词： 18S rRNA gene Apokeronopsis ciliated protists multi-gene ontogenesis systematics Urostylida

EXPERIMENTAL STUDY OF VELOCITY DISTRIBUTIONS IN THE TRANSITION REGION OF PIPES

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Journal of Hydrodynamics 2011年第5期23卷 643-648页

作者： liU Yong-hui DU Guang-sheng liU li-ping shao Zhu-feng ZHAI Cheng-yuan School of Energy and Power Engineering -Shandong University Jinan 250061 China

The accuracy of an ultrasonic flowmeter meaurement depends on the profile-linear average velocity. But this velocity in the transition region is not available at the present. In this article, the velocity in the transition region in pipes is studied by experimental methods. The Particle Image Velocimetry （ PIV ） is used to measure the flow field in the transition region in pipes, and the measured results from PIV are in good agreement with the Westerwell＇s experimental data. Based on the experimental data of PIV, the curves of the profile-linear average velocity in the transition region against the Reynolds number in the range from 2 000 to 20 000 are obtained, and it is shown that the coefficient k is constant when the Reynolds number is in the range of 2 000-2 400 and 6 000-20 000, and the coefficient k is increasing when the Reynolds number is in the range of 2 400-6 000. The results of this article can be used to improve the measurement accuracy of the ultrasonic flowmeters and as a theoretical basis for the research on the transition flow.

关键词： ultrasonic flowmeter Particle Image Velocimetry (PIV) the profile-linear average velocity transition region pipe

A novel 12,23-epoxy dammarane saponin from Panax notoginseng

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Chinese Journal of Natural Medicines 2015年第4期13卷 303-306页

作者： YUAN Cen XU Fa-Xiang HUANG Xiao-Jun li shao-ping ZHANG Qing-Wen State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of Macao Institute of Traditional Chinese Medicine and Natural Products Jinan University

The present study investigated the chemical constituents of the roots and rhizomes of Panax *** were isolated by various column chromatographic methods,and their structures were elucidated by the extensive analysis of spectroscopic data and chemical evidences.A novel 12,23-epoxy dammarane-type saponin,named epoxynotoginsenoside A(1),together with four known compounds(2-5),was isolated and characterized.

关键词： Panax notoginseng Dammarane saponin Epoxynotoginsenoside A

Fluorescence spectra of colloidal self-assembled CdSe nano-wire on substrate of porous Al2O3/Au nanoparticles

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Chinese Physics B 2019年第6期28卷 429-432页

作者： Xin Zhang li-ping shao Man Peng Zhong-Chen Bai Zheng-ping Zhang Shui-Jie Qin College of Big Data and Information Engineering Guizhou UniversityGuiyang 550025China College of Medicine Guizhou UniversityGuiyang 550025China Guizhou Province Key Laboratory for Photoelectric Technology and Application Guizhou UniversityGuiyang 550025China

We present a self-assembly method to prepare array nano-wires of colloidal CdSe quantum dots on a substrate of porous Al2 O3 film modified by gold nanoparticles. The photoluminescence(PL) spectra of nanowires are in situ measured by using a scanning near-field optical microscopy(SNOM) probe tip with 100-nm aperture on the scanning near-field optical microscope. The results show that the binding sites from the edge of porous Al2 O3 nanopores are combined with the carboxyl of CdSe quantum dots’ surface to form an array of CdSe nanowires in the process of losing background solvent because of the gold nanoparticles filling the nano-holes of porous Al2 O3 film. Compared with the area of nonself-assembled nano-wire, the fluorescence on the Al2 O3/Au/CdSe interface is significantly enhanced in the self-assembly nano-wire regions due to the electron transfer conductor effect of the gold nanoparticles’ surface. In addition, its full width at half maximum(FWHM) is also obviously widened. The method of enhancing fluorescence and energy transfer can widely be applied to photodetector, photocatalysis, optical display, optical sensing, and biomedical imaging, and so on.

关键词： enhanced photoluminescence Cd Se nano-wire colloidal self-assembled method porous Al2O3 film

Comprehensive insights:unraveling the mechanisms of gut commensals in glucose metabolism regulation

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Science China(life Sciences) 2024年第2期67卷 414-417页

作者： Zhipeng li Qixing Nie shao-ping Nie State Key Laboratory of Food Science and Resources China-Canada Joint Lab of Food Science and Technology(Nanchang)Key Laboratory of Bioactive Polysaccharides of Jiangxi ProvinceNanchang UniversityNanchang 330047China

The prevalence of type 2 diabetes(T2D)has escalated to a global epidemic,garnering widespread *** research utilizing germ-free(GF)mice,antibiotic treatments,and fecal microbiota transplantation approaches has established the critical role of gut microbiota in modulating glucose *** microbiota interacts with diets and the mucosal immune system,influencing intestinal permeability and the penetration of microbial products.

关键词： metabolism utilizing insight

Rosiglitazone enhances 5-fluorouracil-induced cell growth inhibition in hepatocellular carcinoma cell line Hep3B

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Chinese Journal of Cancer 2010年第8期29卷 741-746页

作者： liang-Qi Cao Zi-li shao He-ping Peng Jian-Bin Xiao Ting Xia Department of Hepatobiliary Surgery the Second Affiliated Hospital of Guangzhou Medical College Guangzhou Guangdong 510260 P. R. China

Background and Objective: Rosiglitazone is a peroxisome proliferators-activated receptor γ (PPARγ) ligand, which inhibits tumor growth by activating PPARγ signaling pathways. Fluorouracil (5-FU) is one of the commonly used chemotherapeutic drugs. However, patients develop drug resistance of 5-FU over time. The aim of this study was to investigate whether rosiglitazone can enhance 5-FU-induced cell growth inhibition and to explore its potential ***: Cell viability was measured using MTT assay. Protein expression levels were detected by Western blot analysis. Small interference RNA was utilized to knockout PPARγ and PTEN in Hep3B cells. Results: After 48 h of treatment with 10, 20, and 40 μmol/L rosiglitazone, the viability of Hep3B cells was (78.0 ± 2.7)%, (37.3 ± 8.1)%, and (19.8 ± 2.2)%, respectively (compared with control group, P values were all lity of Hep3B cells was about (82.6 ± 3.9)%. When cells were treated with 10 μmol/L 5-FU in combination with either 10, 20 or 40 μmol/L rosiglitazone, the cell viability was (51.6 ± 5.4)%, (14.8 ± 4.2)%, and (8.5 ± 0.9)%, with corresponding q value of 1.36, 1.23, and 1.19, respectively. These data suggested that the two drugs had synergic effect in inhibiting Hep3B cell growth, which was further confirmed in an in vivo mice model. Subsequent investigations showed that rosiglitazone activated PPARγ signaling pathways and increased the expression of PTEN. Conclusions: Rosiglitazone enhances 5-FU-induced cell growth inhibition of Hep3B cells.

关键词：罗格列酮生长抑制过氧化物酶体增殖物激活受体细胞株诱导氟尿嘧啶细胞存活率 PTEN基因

A deoxidation thermodynamic model for 304 stainless steel considering multiple-components coupled reactions

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Journal of Iron and Steel Research International 2024年第1期31卷 74-91页

作者： Yan Yan Guang-hao Shang li-ping Zhang shao-ying li Han-jie Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing100083China Henan Jinhui Stainless Steel Industry Group Co. Ltd.Xuchang461500HenanChina Changge Jinhui Recycling Metal R&D Co. Ltd.Xuchang461500HenanChina

A thermodynamic model for predicting the equilibrium oxygens of 304 stainless steel was developed based on the theory of slag-steel equilibrium,the law of mass conservation,and the ion and molecule coexistence *** the developed model,the Fe-Cr-Mn-Si-Al-S-O-melts reaction system and CaO-MgO-CaF_(2)-FeO-MnO-Al_(2)O_(3)-SiO_(2)-Cr2O_(3)slags were *** oxygen contents calculated by the model are in good agreement with experimental results and reference *** equilibrium oxygen contents in 304 stainless steel mainly decrease with increasing binary basicity(w(CaO)/w(SiO_(2)),where w(i)is the mass percentage of component i)and decreasing *** binary basicity at 2.0 while maintaining temperatures lower than 1823 K will keep the oxygen contents in the 304 stainless steel lower than 15×10^(-6).The equilibrium oxygen contents may also be decreased with increasing content of MgO in slags,which is more significant at lower binary ***,a small amount of FeO,MnO,and Al_(2)O_(3)(about 0-2.5 wt.%)in slags has little effect on equilibrium oxygen ***,it is found that the[C]-[O]reaction may occur during refining process but will not significantly affect the equilibrium oxygen contents.

关键词： Complex deoxidation Thermodynamic model Ion and molecule coexistence theory 304 stainless steel Slag-steel reaction