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Measures for Reducing the Rate of Breakout of Slab Casters

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Journal of Iron and Steel Research International 2014年第S1期21卷 95-98页

作者： Zhu-gang peng Zhi-zheng YANG School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Research and Development Center WISCO

In order to reduce the rate of breakout of slab caster, improve the operating rate and ensure the stability of the caster, measures including the tundish casting auto-start, the mold level automatic control system optimization, the SEN one-button automatic quick-change technology, the mold breakout forecast system optimization, the mold oscillation parameters optimization, the mold taper measurement optimization and the mold powder management have been adopted by a steel plant of WISCO. As a result, the breakout rate of slab caster was significantly reduced to be zero level in the first 3 years, which is a new record for all steelmaking plant in China.

关键词： continuous casting breakout accidence measure

Model predictive control of servo motor driven constant pump hydraulic system in injection molding process based on neurodynamic optimization

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第2期15卷 139-146页

作者： Yong-gang peng Jun WANG Wei WEI College of Electrical Engineering Zhejiang University Department of Mechanical and Automation Engineering Chinese University of Hong Kong

In view of the high energy consumption and low response speed of the traditional hydraulic system for an injection molding machine,a servo motor driven constant pump hydraulic system is designed for a precision injection molding process,which uses a servo motor,a constant pump,and a pressure sensor,instead of a common motor,a constant pump,a pressure proportion valve,and a flow proportion valve.A model predictive control strategy based on neurodynamic optimization is proposed to control this new hydraulic system in the injection molding *** results showed that this control method has good control precision and quick response.

关键词： Model predictive control Recurrent neural network Neurodynamic optimization Injection molding machine

Simultaneous determination of 14 active constituents of Shengjiang Xiexin decoction using ultrafast liquid chromatography coupled with electrospray ionization tandem mass spectrometry

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Acta Pharmaceutica Sinica B 2017年第2期7卷 193-201页

作者： gang peng Huanyu Guan Xiaoming Wang Yue Shi Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100193China

An effective herbal medicinal prescription of Shengjiang Xiexin decoction(SXD) was used in treating the inflammatory bowel disease in *** this study,an ultrafast liquid chromatography-tandem mass spectrometry(UFLC-MS/MS) method was developed to separate and to simultaneously determine14 major active ingredients in *** separation was successfully accomplished on an Acquity BEH C18(100 mm × 2.1 mm,1.7 μm) column using gradient elution with 0.1%(v/v) formic acid water(A) and 0.1%(v/v) formic acid in methanol(B).Negative and positive electrospray ionization tandem mass spectrometry was used to detect the 14 analytes using its selective reaction monitoring(SRM) mode.A good linear regression relationship for each analyte was obtained over the range from3.88 ng/mL to 4080 ng/*** precision was evaluated by intra-and inter-day assays with a relative standard deviation(RSD) of less than 6.25%.The recovery measured at three concentration levels varied from 98.72%to 103.47%.The overall limits of quantification(LOQ) ranged from 2.05 ng/mL to4.72 ng/*** method was successfully implemented in the qualitative and quantitative analyses of the14 chemical constituents in *** results showed that the developed UFLC-MS/MS method was linear and *** method could be used reliably as a quality control method for SXD.

关键词： Inflammatory bowel disease Quality control UFLC–MS/MS Determination Shengjiang Xiexin decoction

Study of Viscoelastic Properties of White Carbon Black Reinforced Synthetic Polyisoprene

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Chinese Journal of Polymer Science 2016年第4期34卷 457-465页

作者： Guang-jun Cui Shi-wei Wang peng-gang Yin 郭林 Key Laboratory of Bio-Inspired-Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and EnvironmentBeihang UniversityBeijing 100191China

The viscoelastic properties of synthetic polyisoprenes （PI） reinforced by white carbon black （WCB） have been investigated and compared with WCB reinforced natural rubber （NR）, including cure characteristics, physio-mechanical and dynamic mechanical properties. Compared with NR, PI loaded with the same amount of WCB （PI/WCB） exhibited shorter scorch time and optimal cure time, indicating that WCB fillers are comparatively easier to conjugate with PI. The tensile strength and elongation at break decreased with WCB filling in both PI and NR vulcanizates. The hardness of the rubber vulcanizates increased with the WCB filling in the rubber matrix. PI/WCB blends exhibited smaller hardness data, lower tensile strength, as well as lower elongation at break and tensile stress. Increasing the amount of WCB in rubber matrix induced the Payne effect. However, the Payne effect is much more obvious for the PI/WCB system, and PI/WCB also displayed higher storage modulus whereas lower loss modulus and loss tangent than NR/WCB, which could all be attributed to the poor dispersibilities of WCB in the PI matrix.

关键词： Reinforcement White carbon black Synthetic polyisoprene Natural rubber Viscoelastic properties Payne effect.

Does Internet Use Improve the Income of Residents? -Empirical Evidence from CGSS2017

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China Finance and Economic Review 2021年第4期10卷 96-114页

作者： Xiaoxiao peng Jie Zhang gang peng School of Statistics of Southwestern University of Finance and Economics China

The Internet penetration rate rises sharply in recent years in *** change has had a significant impact on residents’*** using Chinese General Social Survey(CGSS)data set,this paper investigates whether residents who use the Internet earn a higher income than similar residents who do not use the Internet by using propensity score *** results show that there is a premium associated with Internet *** suggest that a premium for residents who use the Internet is around twice as much for residents who do not use the ***,this paper fi nds that the inlome differences between using the Internet and not using the Internet for groups of middle-aged and elderly resident and agricultural household registration residents are more *** on the research results,several relevant policy implications are presented to improve resident’s income.

关键词： propensity score matching Internet use income

Comparison of membrane fouling during short-term filtration of aerobic granular sludge and activated sludge

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Journal of Environmental Sciences 2007年第11期19卷 1281-1286页

作者： ZHOU Jun YANG Feng-lin MENG Fan-gang AN peng WANG Di School of Environmental and Biological Science and Technology Dalian University of Technology Dalian 116024 China

Aerobic granular sludge was cultivated adopting internal-circulate sequencing batch airlift reactor. The contradistinctive experiment about short-term membrane fouling between aerobic granular sludge system and activated sludge system were investigated. The membrane foulants was also characterized by Fourier transform infrared （FTIR） spectroscopy technique. The results showed that the aerobic granular sludge had excellent denitrification ability; the removal efficiency of TN could reach 90%. The aerobic granular sludge could alleviate membrane fouling effectively. The steady membrane flux of aerobic granular sludge was twice as much as that of activated sludge system. In addition, it was found that the aerobic granular sludge could result in severe membrane pore-blocking, however, the activated sludge could cause severe cake fouling. The major components of the foulants were identified as comprising of proteins and polysaccharide materials.

关键词： membrane bioreactor membrane fouling pore-blocking cake layer resistance aerobic granular sludge

ubtor Mutation Causes Motor Hyperactivity by Activating mTOR Signaling in Zebrafish

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Neuroscience Bulletin 2021年第12期37卷 1658-1670页

作者： Tiantian Wang Mingshan Zhou Quan Zhang Cuizhen Zhang gang peng State Key Laboratory of Medical Neurobiology Ministry of Education Frontiers Center for Brain Scienceand Institutes of Brain ScienceFudan UniversityShanghai 200032China

Mechanistic target of rapamycin(mTOR)signaling governs important physiological and pathological processes key to cellular *** of mTOR negative regulators and subsequent over-activation of mTOR signaling are major causes underlying epileptic *** previous studies showed that UBTOR/KIAA1024/MINAR1 acts as a negative regulator of mTOR signaling,but whether UBTOR plays a role in neurological diseases remains largely *** therefore examined a zebrafish model and found that ubtor disruption caused increased spontaneous embryonic movement and neuronal activity in spinal interneurons,as well as the expected hyperactivation of mTOR signaling in early zebrafish *** addition,mutant ubtor larvae showed increased sensitivity to the convulsant pentylenetetrazol,and both the motor activity and the neuronal activity were *** phenotypic abnormalities in zebrafish embryos and larvae were rescued by treatment with the mTORC1 inhibitor *** together,our findings show that ubtor regulates motor hyperactivity and epilepsy-like behaviors by elevating neuronal activity and activating mTOR signaling.

关键词： Ubtor Hyperactivity Epilepsy mTOR Zebrafish

Water Level Deviation Analysis of Levels Between Two Sides of the Boiler Drum

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International Journal of Automation and computing 2016年第2期13卷 142-150页

作者： Fei Xia Ya-Lei Quan Hao Zhang Dao-gang peng School of Electronic and Information Tongji UniversityShanghai 201804China College of Automation Engineering Shanghai University of Electric PowerShanghai 200090China Shanghai Key Laboratory of Power Station Automation Technology Shanghai 200090China

It is always quite difficult to accurately measure boiler drum water level in power plant. Though the effect of false measurement of water level can be reduced with some devices, the effect of deviation of boiler drum water level to the monitoring and alarm system, even to the control of drum water level, and so on, cannot be surmounted. Because of these reasons, the accurate water level alarm signal cannot be provided and the water level control measures cannot be applied. In order to solve this problem, a water level deviation analysis method is presented for analyzing boiler drum water level. Based on the analysis of boiler drum water level related running parameters, the relational model of water level deviation under different working conditions and its parameters is constructed. By analyzing this model, the specific impacts of the main factors can be fixed. Thus the drum water level deviation can be reduced by adjusting running parameters without changing unit load. And then the measurement of drum water level can be more accurate only if power plants have accurate measuring devices. Therefore, the boiler drum water level can be more accurately monitored and controlled. So, this innovation is important in ensuring the safe running of power plant.

关键词： Boiler drum water level deviation analysis measurement safe running

BARK-MIMETIC LAYER-BY-LAYER ASSEMBLED MONTMORILLONITE/POLY(p-AMINOSTYRENE) FLEXIBLE NANOCOMPOSITES SHIELDING ATOMIC OXYGEN EROSION

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Chinese Journal of Polymer Science 2013年第1期31卷 83-87页

作者： Min Gao Bing-jun Liu 高龙成 peng-gang Yin Lei Jiang Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and EnvironmentBeiHang University Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences

Inspired by the birch bark, which has multilayered structures, we fabricated layer-by-layer （LbL） assembled montmorillonite （MMT） and poly（p-aminostyrene）（PPAS） nanocomposites on cotton fiber curved surfaces to provide protection from atomic oxygen （AO） erosion. The multilayer coated fibers had high flexibility, uniformity, defect free, ease of preparation and low cost. The AO erosion durability has been dramatically enhanced which was evidenced by testing in the ground-based AO effects simulation facility. And the dimension and surface morphologies of the fibers observed by SEM had few changes, indicating excellent AO erosion resistant ability of the coatings. These results provide us a new method to design fibrous materials exposed directly in low earth orbit environment.

关键词： Layer-by-layer assembly Atomic oxygen Biomimetics Adhesion Aerospace materials.