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cDNA clone and expression analysis of a-Tropomyosin during Japanese flounder （Parafichthys ofivaceus） metamorphosis

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Zoological Research 2014年第4期35卷 307-312页

作者： hong-Mei ZHANG yan-Fang su Zhi-Yi SHI Yuan-Shuai FU Key Laboratory of Freshwater Aquatic Genetic Resources Shanghai Ocean UniversityMinistry of Agriculture

Tropomyosin （TM） plays a critical role in skeletal and cardiac muscle development and function. To assess the fimctional significance of a-TM in Japanese flounder （Paralichthys olivaceus） development and metamorphosis, cDNA from Japanese flounder was cloned and a-TM mRNA measured during development and metamorphosis. The full-length cDNA is 1 191 bp, including a 5＇- untranslated region of 114 bp, a Y-UTR of 222 bp, and an open reading frame of 855 bp encoding a polypeptide of 284 amino acids. Real-time quantitative PCR revealed that a-TM mRNA is initially expressed in unfertilized ovum, indicating the a-TM gene is maternal. Relatively low mRNA levels were observed in different embryonic stages. A higher level of a-TM mRNA was detected 3 days post hatching （dph）, while the highest level was measured at 29 dph （metamorphic climax） after which it declined towards the end of metamorphosis. The expression of a-TM mRNA was up-regulated in thyroid hormone-treated larvae at 36 dph, but there was no marked difference at other stages when compared to control animals. After thiourea treatment, the expression of a-TM mRNA declined slightly. These data provide basic information that can be utilized in further studies into the role of a-TM in P olivaceus development and metamorphosis.

关键词： Paralichthys olivaceus Cloning Expression a-Tropomyosin Thyroid hormone

A building unit decomposition model for energy leakage by infrared thermography image analysis

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Frontiers in Energy 2020年第4期14卷 901-921页

作者： yan su Fangjun hong Lianjie SHU Department of Electromechanical Engineering University of MacaoTaipaMacaoChina School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Faculty of Business Administration University of MacaoTaipaMacaoChina

A quantitative energy leakage model was developed based on the thermography image data measured for both external and internal building *** infrared thermography images of both surfaces of doors,windows,and walls of an office building in the Hengqin Campus of University of Macao were taken at various times in a day for four *** transient heat flux for sample units were obtained based on measurements of the seasonal transient local temperature differences and calculations of the effective thermal conductivity from the multiple-layer porous medium conduction *** of construction unit types,orientations,and seasons were quantitatively investigated with unit transient orientation index *** corresponding electric energy consumption was calculated based on the air conditioning system coefficient of performance of heat pump and refrigerator cycles for different *** model was validated by comparing to the electric meter records of energy consumption of the air conditioning *** uncertainties of the predicted total building energy leakage are about 14.7%,12.8%,12.4%,and 15.8%for the four seasons,*** differences between the predicted electric consumption and meter values are less than 13.4%and 5.4%for summer and winter,*** typical daily thermal energy leakage value in winter is the highest among the four ***,the daily electric energy consumption by the air conditioning system in summer and autumn is higher than that in *** present decomposition model for energy leakage is expected to provide a practical tool for quantitative analysis of energy leakage of buildings.

关键词： heat conductivity heat coefficient heat flux infrared thermography thermal image

Preparation and Characterization of Platinum supported on Carbon Nanotubes with Different Tube Diameter for Cathode Catalysts of Proton Exchange Membrane Fuel Cells

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Journal of Materials Science & Technology 2010年第6期26卷 529-534页

作者： hong su Bing Zhang Lijuan Chen Tecchnical Instituteof Physms and Chemistry of CAS Beijing 100190 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

Platinum supported on carbon nanotubes （CNTs） with different tube diameters 〈10, 10-20, 40-60 and 60- 100 nm were prepared. The catalysts were characterized by transmission electron microscopy （TEM）, X-ray diffraction （XRD）. The metal particle size for 40 wt pct Pt catalysts were 2-5 nm. Self-prepared Pt/CNTs catalysts and purchased Pt/XC-72 were studied by polarization curves, and it was found that in the H2/O2 fuel cell system, Pt supported on Vulcan XC-72 （Pt/XC-72） possessed higher catalytic activity than Pt/CNTs. But in H2/air system, Pt supported on CNTs with diameter 10-20 nm （Pt/CNTI020） possessed higher activity than other Pt/C catalysts.

关键词： Fuel cell Pt/C catalyst Carbon nanotubes (CNTs) Catalytic activity

A Central Limit Theorem for Branching Brownian Motion with Random Immigration

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Acta Mathematica Sinica,English Series 2014年第1期30卷 69-78页

作者： hong yan suN School of Mathematical Sciences Beijing Normal University

We establish a central limit theorem for a branching Brownian motion with random immigration under the annealed law,where the immigration is determined by another branching Brownian *** limit is a Gaussian random measure and the normalization is t3/4for d=3 and t1/2for d≥4,where in the critical dimension d=4 both the immigration and the branching Brownian motion itself make contributions to the covariance of the limit.

关键词： Branching Brownian motion random immigration central limit theorem occupation time

Microstructure and microhardness of Ti-48Al alloy prepared by rapid solidification

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China Foundry 2020年第6期17卷 429-434页

作者： Xiao-yu Chen hong-ze Fang Qi Wang Shu-yan Zhang Rui-run Chen yan-qing su School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Electromechanic Engineering Qingdao UniversityQingdao 266071China Centre of Excellence for Advanced Materials Dongguan 523808China

To improve the microstructure and microhardness,Ti-48Al(at.%)alloy was rapidly solidified by melt spinning under different cooling *** microstructure and microhardness of rapidly solidified Ti-48Al alloy were systematically *** show that the average lamellar colony size of the alloy reduces from 60.6μm to 11μm as the cooling rate increases from 2.3×105 to 5.1×105 K·s-1,caused by the increase of nucleation rate at a higher cooling *** the high cooling rate of(4.3-5.1)×105 K·s-1,theαphase is the primary phase,and a few metastableαphases are reserved,which then transform intoα2 phase and subsequently lead to the formation ofα2 equiaxed *** lamellar spacing also decreases with the increase of cooling *** relationship between lamellar spacing(d)and cooling rate(v)is d=*** microhardness increases with the increase of cooling rate because the refined lamellar spacing and grain size can improve the microhardness.

关键词： cooling rate solidification path microstructure lamellar spacing microhardness

Shrub Communities and Environmental Variables Responsible for Species Distribution Patterns in an Alpine Zone of the Qilian Mountains, Northwest China

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Journal of Mountain Science 2015年第1期12卷 166-176页

作者： HUO hong FENG Qi su Yong-hong Key Laboratory of Ecohydrology of Inland River Basin Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences University of Chinese Academy of Sciences

Understanding the factors that drive variation in species distribution is a central theme of ecological research. Although several studies focused on alpine vegetation, few efforts have been made to identify the environmental factors that are responsible for the variations in species composition and richness of alpine shrublands using numerical methods. In the present study, we investigated vegetation and associated environmental variables from 45 sample plots in the middle Qilian Mountains of the northwestern China to classify different community types and to elucidate the species- environment relationships. We also estimated the relative contributions of topography and site conditions to spatial distribution patterns of the shrub communities using the variation partitioning. The results showed that four shrub community types were identified and striking differences in fioristic composition were found among them. Species composition greatly depended on elevation, slope, shrub cover, soil pH and organic carbon. The important determinants of species richness were soil bulk density and slope. No significant differences in species richness were detected among the community types. Topography and site conditions had almost equal effects on compositional variation. Nonetheless,a large amount of the variation in species composition remained unexplained.

关键词： Alpine shrublands Floristic composition Cluster analysis Canonical Correspondence Analysis(CCA) Variation partitioning Species composition Species richness

Finite element method for coupled diffusion-deformation theory in polymeric gel based on slip-link model

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Applied Mathematics and Mechanics(English Edition) 2018年第4期39卷 581-596页

作者： Hengdi su Huixian yan Bo JIN School of Aerospace Engineering and Applied Mechanics Tongji University School of Mechanical and Electrical Engineering Sanming University

A polymeric gel is an aggregate of polymers and solvent molecules, which can retain its shape after a large deformation. The deformation behavior of polymeric gels was often described based on the Flory-Rehner free energy function without considering the influence of chain entanglements on the mechanical behavior of gels. In this paper,a new hybrid free energy function for gels is formulated by combining the EdwardsVilgis slip-link model and the Flory-Huggins mixing model to quantify the time-dependent concurrent process of large deformation and mass transport. The finite element method is developed to analyze examples of swelling-induced deformation. Simulation results are compared with available experimental data and show good agreement. The influence of entanglements on the time-dependent deformation behavior of gels is also *** study of large deformation kinetics of polymeric gel is useful for diverse applications.

关键词： polymeric gel finite element method slip-link model large deformation mass transport kinetics

Improving rehabilitation and quality of life after percutaneous transhepatic cholangiography drainage with a rapid rehabilitation model

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World Journal of Clinical Cases 2021年第34期9卷 10530-10539页

作者： Lu-Lu Xia Ting su yan Li Jun-Fang Mao Qi-hong Zhang yang-yan Liu Department of General surgery Hangzhou Red Cross HospitalHangzhou 310003Zhejiang ProvinceChina Department of Emergency Taizhou Hospital of Zhejiang ProvinceLinhai 317000Zhejiang ProvinceChina Department of Gastroenterology The Central Hospital of Lishui CityLishui 323000Zhejiang ProvinceChina Department of Emergency Zhuji People’s Hospital of Zhejiang ProvinceZhuji 311800Zhejiang ProvinceChina

BACKGROUND Percutaneous transhepatic cholangiography drainage(PTCD)effectively treats biliary ***,patients must maintain the drainage tube after hospital discharge,which may interfere with daily life and work,potentially causing psychological *** rehabilitation is crucial,and strengthened nursing interventions can shorten recovery *** The aim was to evaluate an inpatient model to shorten rehabilitation duration and improve quality of life after *** A total of 118 patients with malignant obstructive jaundice who were admitted to our hospital between May 2018 and January 2021 were included and divided into observational(with therapy)and control(no therapy)groups of 59 *** The observational group had fewer hospitalization days than the control *** complication,the PTCD fixed-tube prolapse,and tube-related admission rates within 3 mo after PTCD were significantly lower in the observation group than in the control group(P<0.05).The fatigue,pain,nausea,vomiting,pruritus,emaciation,and fever scores after PTCD decreased in both groups compared with the scores before PTCD(P<0.05).The quality of life scores after the intervention were higher in the observation than in the control group(P<0.05).CONCLUSION The model promoted rehabilitation after PTCD,reduced post-PTCD complications,and the tube-related admissions in the 3 mo after the procedure,and improved the quality of life.

关键词： Rapid rehabilitation model Percutaneous transhepatic cholangiography drainage Quality of life Complications

OPTIMAL PURCHASING PROCESS FOR ELECTRICITY AND RENEWABLE ENERGY CREDITS WITH PRICE AND DEMAND UNCERTAINTY

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Journal of Systems Science and Systems Engineering 2012年第2期21卷 184-203页

作者： Zhiyuan CHEN Yiwen su Houmin yan Department of Automation Tsinghua University Beijing 100084 China Department of Systems Engineering and Engineering Management The Chinese University of Hong Kong Department of Management Sciences City University of Hong Kong Kowloon China

This paper optimizes the electricity and renewable energy credit （REC） purchasing process for energy distribution. Electricity is traded in deregulated time-sequential markets at fluctuating prices. Optimal electricity purchasing under price and demand uncertainty is a challenging task for electricity distributors, and the recently implemented renewable portfolio standards （RPS） further complicate the purchasing process. Government regulatory decisions concerning the RPS require distributors to purchase corresponding certificates, namely RECs, equivalent to a certain percentage of their electricity sales. This paper formulates and optimizes the joint purchasing process for electricity and RECs. It also analyzes the effect of RPS policy on electricity distributors.

关键词： Renewable energy credit information update dynamic programming