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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

Low-Frequency Vibrations of Indole Derivatives by Terahertz Time-Domain Spectroscopy

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Journal of Electronic Science and Technology 2016年第4期14卷 329-336页

作者： Ya-Ru Dang shao-ping li Hui liu shao-Xian li Jian-Bing Zhang Hong-Wei Zhao School of Chemical Engineering East China University of Science and TechnologyShanghai200237China School of Precision Instrument and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

Several indole derivatives with different ＇3-＇ substituents have been investigated by terahertz （THz） time-domain spectroscopy. The low-frequency absorption spectra and refractive indices were obtained in the range of 0.2 THz to 2.5 THz （7 cm-1 to 83 cm-1）. These derivatives with different substituents present distinct features, which suggests that THz spectroscopy is sensitive to different structures and components of these chemicals. The density functional theory was employed to calculate the low-frequency vibrational properties of indole-3-carboxylic acid and indole-3-propionic acid based on their crystal structures, and the intermolecular interactions were involved. Meanwhile, the temperature dependence of the spectra agreed with the calculated results. The quantitative analysis of a ternary mixture was studied by taking the THz fingerprints into account, and the results demonstrate THz spectroscopy has great potential for the practical applications in biochemistry and pharmaceutics.

关键词： Characteristic spectrum density functional theory indole derivatives low-frequency vibration terahertz.

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

Comparison of invasive dynamic blood pressure between superior mesenteric artery and common carotid artery in rats

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World Journal of Emergency Medicine 2020年第2期11卷 102-108页

作者： Rui-ning liu Xiao-jun Wei shao-ping li Cheng Jiang Yan Zhao Emergency Department of Zhongnan Hospital Wuhan UniversityWuhan 430071China

BACKGROUND: The purpose of this study was to identify the consistency of invasive dynamic blood pressure(BP) monitoring between the superior mesenteric artery(SMA) and the common carotid artery(CCA).METHODS: Eight male Sprague-Dawley rats were cannulated in SMA and CCA simultaneously for BP monitoring, *** abdominal aorta was prepared for the induction of BP change through clamping/de-clamping by a microvascular *** dynamic BP monitoring was performed by a polygraph *** blood pressure(SBP), diastolic blood pressure(DBP), and mean arterial pressure(MAP) values would be recorded during different time periods: the baseline(T1), the increasing period after clamping(T2), the platform period during clamping(T3), the decreasing period after de-clamping(T4), and the final platform period(T5).Three trials were performed on each rat with 15-minute intervals between consecutive ***: Systolic BP showed no significant differences between SMA and ***, significant difference was found in diastolic blood pressure except at T5(P=0.534).Mean arterial pressure of two arteries were significantly different only at T1(P=0.015).The strength of association was significantly high between BP measurements through SMA and CCA(P<0.001).The BlandAltman analyses showed that mean bias of MAP changed no more than 5 mmHg and standard deviation less than 8 mmHg during T2 and T4, ***: The study indicates SMA might be an alternative site for invasive BP monitoring during abdominal aorta occlusion and release, especially in cerebrovascular-related research.

关键词： Blood pressure Superior mesenteric artery Common carotid artery Abdominal aorta

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

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

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