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Performance Prediction of an Optimized Centrifugal Pump with High Efficiency

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Fluid Dynamics & Materials Processing 2023年第9期19卷 2215-2228页

作者： yuqin wang Luxiang Zhou Mengle Han Lixiang Shen School of Mechanical Engineering Chaohu UniversityChaohu238024China College of Engineering Technological University of the PhilippinesManila1106Philippines School of Mechanical Engineering Anhui Polytechnic UniversityWuhu241000China

The main structural parameters of the IR100-80-100A type chemical centrifugal pump have been optimized by means of an orthogonal test *** centrifugal pump has been modeled using the CFturbo software,and 16 sets of orthogonal-test schemes have been deﬁned on the basis of 4 parameters,namely,the blade number,blade outlet angle,impeller outlet diameter,and impeller outlet *** analysis has been used to determine the inﬂuence of each index parameter on the pump working efﬁciency and identify a set of optimal combinations of such *** internalﬂowﬁeld in the centrifugal pump has been simulated by using the PumLinx *** numerical results have shown that,compared with the prototype pump,the outlet pressure and shaft power of the optimized pump can be signiﬁcantly reduced,and the pump working efﬁciency can be improved by 5.59%.In the present study,some arguments are also provided to demonstrate that,with respect to other optimization methods,the orthogonal test approach is more convenient,and requires less test times.

关键词： Centrifugal pump structural design work efficiency internal flow field simulation impeller

Distribution of elements extracted from symptom patterns and characteristics of polysomnograph of common symptom patterns of insomnia with Traditional Chinese Medicine

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Journal of Traditional Chinese Medicine 2016年第5期36卷 649-653页

作者： Cui Yinglin Zheng Weifeng Xu Li Meng Yi wang yuqin Chang Xuehui Brain Disease Ward 2 Henan Province Hospital of Traditional Chinese Medicine Basic Medical Henan University of Traditional Chinese Medicine

OBJECTIVE: To analyze the distribution and combined regulation of elements of symptom patterns in the diagnosis of insomnia with Traditional Chinese Medicine(TCM).METHODS: The samples were collected from the patients, diagnosed with insomnia, of Henan Province Hospital of TCM between June 2011 and September 2013. The symptom patterns in insomnia were extracted. Next, symptom differentiation,characteristics of polysomnography(PSG), distribution and combined regulation of these symptom patterns were conducted by ***: In total, 286 eligible patients were recruited. The main locations of the disease symptom elements were the brain and heart, and the main characteristics of the disease symptom elements were phlegm-heat, Yin-deficiency and Qi-stagnation. The elements from two or three symptom patterns were commonly manifested in patients with insomnia, especially from three symptom patterns. We also found that all TCM symptom patterns had an effect on polysomnographic indicators in PSG ***: The elements of symptom patterns in insomnia were identified as mainly fire-heat and phlegm-heat. The most common patterns of excess were pathogenic fire derived from stagnation of liver-Qi, and mental disturbance due to phlegm-heat,while the most common patterns of deficiency in both the heart and the spleen. There are many differences in PSG indicators of different syndrome patterns of insomnia.

关键词： Sleep initiation and maintenance disorders Symptom elements Polysomnogram Polysomnography

One-pot synthesis of N-doped petroleum coke-based microporous carbon for high-performance CO_(2) adsorption and supercapacitors

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Journal of Environmental Sciences 2024年第5期139卷 93-104页

作者： Wenfu Zhu yuqin wang Fan Yao Xiaohong wang Haoming Zheng Guangzheng Ye Hairong Cheng Junliang Wu Haomin Huang Daiqi Ye School of Environment and Energy South China University of TechnologyGuangzhou 510006China National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou 510006China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control(SCUT) Guangzhou 510006China Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal South China University of TechnologyGuangzhou 510006China

Waste resource utilization of petroleum coke is crucial for achieving global carbon emission ***,a series of N-doped microporous carbons were fabricated from petroleum coke using a one-pot synthesis *** as-prepared samples had a large specific surface area(up to 2512 m^(2)/g),a moderate-high N content(up to 4.82 at.%),and high population(55%)of ultra-micropores(<0.7 nm).Regulating the N content and ultra-microporosity led to efficient CO_(2)adsorption and *** ambient pressure,the optimal N-doped petroleum coke-based microporous carbon exhibited the highest CO_(2)uptake of 4.25 mmol/g at 25℃ and 6.57 mmol/g at 0℃.These values are comparable or even better than those of numerous previously reported adsorbents prepared by multistep synthesis,primarily due to the existence of *** sample exhibited excellent CO_(2)/N_(2)selectivity at 25℃ owing to the abundant basic pyridinic and pyrrolic N species;and showed superior CO_(2)adsorption-desorption cycling performance,which was maintained at 97% after 10 cycles at 25℃.Moreover,petroleum coke-based microporous carbon,with a considerably high specific surface area and hierarchical pore structure,exhibited excellent electrochemical performance over the N-doped sample,maintaining a favorable specific capacitance of 233.25F/g at 0.5 A/g in 6 mol/L KOH aqueous *** study provides insight into the influence of N-doping on the porous properties of petroleum coke-based ***,the as-prepared carbons were found to be promising adsorbents for CO_(2)adsorption,CO_(2)/N_(2)separation and electrochemical application.

关键词： One-pot synthesis N-doped microporous carbon CO_(2)adsorption CO_(2)/N_(2)selectivity Electrochemical performance

Preparation of Mycobacterium smegmatis porin A(MspA)nanopores for single molecule sensing of nucleic acids

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Biophysics Reports 2021年第5期7卷 355-364页

作者： yuqin wang Pingping Fan Shanyu Zhang Shuanghong Yan Shuo Huang State Key Laboratory of Analytical Chemistry for Life Sciences School of Chemistry and Chemical EngineeringNanjing University Chemistry and Biomedicine Innovation Center (ChemBIC) Nanjing University

Mycobacterium smegmatis porin A(MspA), possessing a short(～0.6 nm) and narrow(～1.2 nm) constriction that enables its high spatial resolution of sensing, has emerged as an optimum choice for nanopore sequencing and nano-reactive sensing. However, prepared Msp A nanopores cannot be obtained from any commercial vendors. We here provide a highly simplified protocol for Msp A preparation. The protocol yields ～10 mg fully oligomerized protein per liter of culture and is straightforward to *** the prepared Msp A nanopores, discrimination of immobilized ss DNA oligonucleotides can be performed, which serves as a demo application to demonstrate core procedures of single molecule sensing using MspA. This method is also in principle compatible with all other Msp A mutants, which might merit the need to develop a variety of MspA based nano-reactive sensors.

关键词： MspA nanopore Prokaryotic expression Affinity purification Single molecule sensing

The tomato 2-oxoglutarate-dependent dioxygenase gene SlF3HL is critical for chilling stress tolerance

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Horticulture Research 2019年第1期6卷 1153-1164页

作者： Tixu Hu yuqin wang Qiqi wang Ningning Dang Ling wang Chaochao Liu Jianhua Zhu Xiangqiang Zhan State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticulture Northwest A&F UniversityNo.3Taicheng Road712100 YanglingShaanxiChina School of Biotechnology Jiangsu University of Science and TechnologyZhenjiangJiangsuChina Department of Plant Science and Landscape Architecture College of Agriculture and Natural ResourcesUniversity of MarylandCollege ParkMD 20742USA

Low temperature is a major stress that severely affects plant development,growth,distribution,and ***,we examined the function of a 2-oxoglutarate-dependent dioxygenase-encoding gene,SlF3HL,in chilling stress responses in tomato(Solanum lycopersicum *** Craig[AC]).Knockdown(KD)of SlF3HL(through RNA interference)in tomato led to increased sensitivity to chilling stress as indicated by elevated levels of electrolyte leakage,malondialdehyde(MDA)and reactive oxygen species(ROS).In addition,the KD plants had decreased levels of proline and decreased activities of peroxisome and superoxide *** expression of four cold-responsive genes was substantially reduced in the KD ***,seedling growth was significantly greater in AC or SlF3HLoverexpression plants than in the KD plants under either normal growth conditions with methyl jasmonate(MeJA)or chilling stress ***3HL appears to positively regulate JA accumulation and the expression of JA biosynthetic and signaling genes under chilling ***,these results suggest that SlF3HL is a positive regulator of chilling stress tolerance and functions in the chilling stress tolerance pathways,possibly by regulating JA biosynthesis,JA signaling,and ROS levels.

关键词： elevated stress chilling

Bioinspired self-assembly supramolecular hydrogel for ocular drug delivery

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Chinese Chemical Letters 2021年第12期32卷 3936-3939页

作者： Xianglian Li Hui Liu Ailing Yu Dan Lin Zhishu Bao yuqin wang Xingyi Li Institute of Biomedical Engineering School of Ophthalmology OptometryEye HospitalWenzhou Medical UniversityWenzhou 325027China

Based on a recent report concerning endogenous agents(i.e., pyridoxal phosphate, adenosine triphosphate, adenosine monophosphate, folinic acid) that modulate the oligomerization of apoptosis-associated speck-like protein(ASC) via the peptide epitope of KKFKLKL, we rationally designed and synthesized a nonapeptide(Nap FFKKFKLKL), which can co-assemble with dexamethasone sodium phosphate(Dexp) to generate a Nap FFKKFKLKL/Dexp supramolecular hydrogel for ocular drug *** Nap FFKKFKLKL/Dexp hydrogel formed instantly after the complexation of Nap FFKKFKLKL with Dexp in aqueous solution. The formed supramolecular hydrogels were thoroughly characterized by transmission electron microscopy(TEM), fluorescent spectrum, circular dichroism(CD) spectra and rheology. The peptide concentration significantly affected the in vitro release behavior of Dexp from the supramolecular hydrogel, and the higher peptide concentration resulted in the slower drug *** a single intravitreal injection, the proposed Nap FFKKFKLKL/Dexp hydrogel displayed good intraocular biocompatibility without having an adverse impact on the retinal architecture and eyesight functions during one month of follow-up. Using an experimental autoimmune uveitis(EAU) rat model,we demonstrated that the resulting Nap FFKKFKLKL/Dexp hydrogel had potent capacity to alleviate the intraocular inflammation and retain the morphology of retinal architecture. Overall, the resulting Nap FFKKFKLKL/Dexp hydrogel may be a promising drug carrier system to treat various posterior disorders(i.e., uveitis).

关键词： Supramolecular hydrogel Self-assembly Drug delivery Ocular disorder

Main Mechanism for Generating Overpressure in the Paleogene Source Rock Series of the Chezhen Depression,Bohai Bay Basin, China

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Journal of Earth Science 2019年第4期30卷 775-787页

作者： Junli Zhang Sheng He yuqin wang Yongshi wang Xuefeng Hao Shengyuan Luo Ping Li Xuewei Dang Ruizhi Yang Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China Research Institute of Exploration and Development Shengli Oilfield CompanySINOPECDongying 257000China Wuhan Center of China Geological Survey Wuhan 430205China Wuhan Zondy Cyber-Tech Co. Ltd. Wuhan 430074China

The Chezhen depression,located in the south of Bohai Bay Basin,is an oil-producing basin in China. The third and fourth members of the Shahejie Formation(E(s3) and E(s4)) are the main source rock series in the Chezhen depression. Widespread overpressures occurred in the E(s3) and E(s4) from the depths of approximately 2 000 to 4 600 m,with the maximum pressure coefficient of 1.98 from drillstem tests(DST). Among the sonic,resistivity and density logs,sonic-log is the only reliable pressure indicator and can be used to predict the pore pressure with Eaton's method. All the overpressured mudstones in the source rock series have higher acoustic traveltimes compared with normally pressured mudstones at a given depth. The overpressured mudstones in the E(s3) and E(s4) units are characterized by a normal geothermal gradient,high average density values up to 2.5 g/cm^3,strong present-day hydrocarbon generation capability,abundant mature organic matter and high contents of residual hydrocarbons estimated by the Rock-Eval S1 values and chloroform-soluble bitumen "A" values. All suggest that the dominant mechanism for overpressure in the mudstones of source rock series in the Chezhen depression is hydrocarbon generation. A comparison between the matrix porosity of the normally pressured sandstones and overpressured sandstones,the quantitative evaluation of porosity loss caused by compaction and the conventional thin section inspection demonstrate that the sandstones in the Chezhen depression were normally compacted. The high contents of hydrocarbons in the overpressured reservoirs prove that the overpressure in the sandstones of the source rock series was caused by pressure transmission from the source rocks.

关键词： overpressure-generating mechanism source rock series Es3 and Es4 formations Chezhen depression

Tackle China's Economic Complexities by Deepening Reform and Opening Up: Macroeconomic Outlook, Policy Simulations, and Reform Implementation—A Summary of the Annual SUFE Macroeconomic Report (2018-2019)

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2019年第1期14卷 80-109页

作者： Kevin X.D. Huang Guoqiang Tian yuqin wang Department of Economics Vanderbilt University Nashville TN 37235 USA Institute for Advanced Research Shanghai University of Finance and Economics Shanghai 200433 China Department of Economics Texas A&M University College Station TX 77843 USA School of Economics Shanghai University of Finance and Economics Shanghai 200433 China

Faced with complicated external and internal challenges, China's economy continues to see sluggish growth in 2018. Rapid accumulation of household debts, exacerbation in income inequality, tightened real sector liquidity, escalated trade tensions with the US, and weakened external demand pose key problems in China's macroeconomic landscape. The status quo is exacerbated by soaring uncertainty and weakening confidence in the face of persistent resource misallocations and institutional distortions, which cast more shadow on the already dampened consumer sentiment, sluggish private investment growth, and fallen foreign reserves. This summary report highlights the urgency of deeper structural reforms for tackling the various internal and external problems. Based on the IAR-CMM model, with both cyclical and secular factors taken into consideration, our baseline forecast of real GDP growth rate is 6.4%(6.1% using more reliable instead of the official data) in 2019. Alternative scenario analyses and policy simulations are conducted to assess the consequences of possible downside risks and the corresponding policy options needed to ensure the assumed growth targets. These analyses lead us to conclude that comprehensively deepening reform and opening up, which should be both rule-of-law based and market-oriented, with well-designed and well-conceived strategies that properly weigh short-, medium-, and long-term benefits and costs, should continue to be set as the guidance for China's transformation into a phase with sustainable and high-quality growth.

关键词： macroeconomic outlook alternative scenario analysis policy simulation risk reform complex status-quo resource misallocations market-oriented

Intervjuo Kun Puramo Chong

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世界 1996年第11期 2-4页

作者： wang yuqin

Okaze de la Unua Azia Kongreso de Esperanto enanhajo deinio,raportistino wang yuqinel Esperanto-redakcio deina Radio Internacia intervjuis s-ron Puramo Chong,prezidanton deKorea Esperanto-Asocio kaj sekretarion de KAEM.

关键词： Cu Intervjuo Kun Puramo Chong Pro