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Performance Analysis and Multi-Objective Optimization of Two Organic Rankine Cycles with Different Fluids for Low Grade Waste Heat Recovery

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Journal of Thermal Science 2022年第3期31卷 650-662页

作者： GE yi HAN Jitian zhu Xiaoxuan School of Energy and Power Engineering Shandong UniversityJi’nan250061China

The basic organic Rankine cycle(BORC)and ORC with an internal heat exchanger(IHORC)are studied with different working fluids under a given heat source condition to analyse the thermodynamic performances and net power *** results demonstrate that the external exergy efficiency of IHORC is lower than that of BORC while the internal exergy efficiency is on the opposite with the same overall exergy efficiencies.A multi-objective optimization model with inlet pressure and temperature of expander as independent parameters and exergy and heat recovery efficiencies as objective functions is solved by NSGA-II(the second non-dominated sorting genetic algorithm).The Pareto optimal solutions are obtained by the optimization *** calculation with the optimum conditions,it is determined that R236ea has the best comprehensive performance with exergy efficiencies being 40.69%and 41.38%,and heat recovery efficiencies being 83.2%and 75.6%in IHORC and BORC,*** evaporators occupy the maximum exergy destruction,which can be reduced by decreasing pinch point temperatures and increasing evaporation pressures.

关键词： ORC working fluids exergy analysis multi-objective optimization exergy destruction

受精卵细胞质晕与胚胎发育潜能及临床妊娠结局的关系

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生殖与避孕 2013年第9期33卷 581-585页

作者：李恩书叶英辉朱依敏李佳寅王海涛金帆浙江大学医学院附属妇产科医院杭州310006

目的:分析受精卵细胞质晕(halo)用于胚胎发育潜能评价、妊娠结局预测的意义。方法:统计分析IVF原核期2PN受精卵halo出现率与胚胎早期卵裂率、移植前胚胎分级、临床妊娠率和着床率的关系。结果:出现与未出现halo胚胎,早期卵裂及细胞碎片... 详细信息

目的:分析受精卵细胞质晕(halo)用于胚胎发育潜能评价、妊娠结局预测的意义。方法:统计分析IVF原核期2PN受精卵halo出现率与胚胎早期卵裂率、移植前胚胎分级、临床妊娠率和着床率的关系。结果:出现与未出现halo胚胎,早期卵裂及细胞碎片情况无统计学差异;出现halo的胚胎,优质胚胎形成率显著高于未出现halo的胚胎;以出现halo、早分裂的优质胚胎为指标选择移植胚胎组的临床妊娠率及着床率高于单以优质胚胎、出现早分裂或出现halo为指标选择的移植胚胎组。比较C型和P型halo的早期卵裂率、细胞碎片率、优质胚胎率、临床妊娠率及着床率,差异均无统计学意义。结论:受精卵halo的出现对胚胎发育潜能有一定的预示作用,可以为移植胚胎的选择提供参考。

关键词：细胞质晕(halo) 早期卵裂优质胚胎胚胎发育潜能妊娠率

Post-spin crossing dynamics determine the regioselectivity in open-shell singlet biradical recombination

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Organic Chemistry Frontiers 2022年第4期9卷 995-1003页

作者： min zhu Chao Zheng State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling LuShanghai 200032China School of Physical Science and Technology ShanghaiTech University100 Haike RoadShanghai 201210China

Radical recombination is among the fastest reactions in organic *** high levels of selectivity in this type of reaction is rather *** a recent report on visible-light-induced dearo-mative cycloaddition of pyrrole-tethered vinylcyclopropanes,extraordinary regioselectivity was observed during the intramolecular open-shell singlet biradical recombination step.

关键词： singlet radical regioselectivity

Bone gain and loss: insights from genomes and fossils

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National Science Review 2014年第4期1卷 490-492页

作者： min zhu Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences

In the human body,bones are dynamic and highly tuned organs that allow eicient movement,protect vital organs and house the bone marrow[1].Among the four skeletal tissue types(bone,dentine,enamel,cartilage)in vertebrates,bone is the most distinct and diversiied mineralized tissue that is paterned to provide maximal strength with minimal mass[2].Based on the bone formation or ossiication types in the embryos and young

关键词： Gln Pro In insights from genomes and fossils Bone gain and loss bone

Effect of alloying elements on magnesium alloy damping capacities at room temperature

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International Journal of minerals,Metallurgy and Materials 2019年第6期26卷 760-765页

作者： Di-qing Wan ying-lin Hu Shu-ting Ye zhu-min Li Li-li Li yi Huang School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013China Materials Research Group Faculty of Engineering and the EnvironmentUniversity of SouthamptonSouthampton SO17 1 BJUK

Alloying is a good approach to increasing its strength but leads to a reduction of damping to pure *** the alloying characteristics of various alloying elements in magnesium alloys and their combined effects on the damping and mechanical properties of magnesium alloys is *** this paper,the properties of the Mg-0.6wt%X binary alloys were analyzed through strength measurements and dynamic mechanical *** effects of foreign atoms on solid-solution strengthening and dislocation damping were studied *** effect of solid solubility on damping capacity can be considered from two perspectives:the effect of single solid-solution atoms on the damping capacities of the alloy,and the effect of solubility on the damping capacities of the *** results provide significant information that is useful in developing high-strength,high-damping magnesium *** study will provide scientific guidance regarding the development of new types of damping magnesium alloys.

关键词： magnesium alloys high-damping high-strength alloying

Corrosion behavior of low alloy steels in a wet–dry acid humid environment

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International Journal of minerals,Metallurgy and Materials 2016年第9期23卷 1076-1086页

作者： Qing-he Zhao Wei Liu Jian-wei Yang yi-chun zhu Bin-li Zhang min-xu Lu Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Shougang Research Institute of Technology Beijing 100043China

The corrosion behavior of corrosion resistant steel（CRS） in a simulated wet–dry acid humid environment was investigated and compared with carbon steel（CS） using corrosion loss, polarization curves, X-ray diffraction（XRD）, scanning electron microscopy（SEM）, electron probe micro-analysis（EPMA）, N2 adsorption, and X-ray photoelectron spectroscopy（XPS）. The results show that the corrosion kinetics of both steels were closely related to the composition and compactness of the rust, and the electrochemical properties of rusted steel. Small amounts of Cu, Cr, and Ni in CRS increased the amount of amorphous phases and decreased the content of γ-Fe OOH in the rust, resulting in higher compactness and electrochemical stability of the CRS rust. The elements Cu, Cr, and Ni were uniformly distributed in the CRS rust and formed CuFeO2, Cu2O, CrOOH, NiFe2O4, and Ni2O3, which enhanced the corrosion resistance of CRS in the wet–dry acid humid environment.

关键词： low alloy steel steel corrosion rust polarization curves corrosion resistance

Pancreaticoduodenectomy for borderline resectable pancreatic head cancer with a modified artery-first approach technique

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Hepatobiliary & Pancreatic Diseases International 2017年第2期16卷 215-221页

作者： min Wang Hang Zhang Feng zhu Feng Peng Xin Wang ming Shen Ren-yi Qin Department of Pancreatic-Biliary Surgery Affiliated Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

BACKGROUND： The treatment of borderline resectable pancreatic head cancer（BRPHC） is still controversial and challenging. The artery-first approaches are described to be the important options for the early determination. Whether these approaches can achieve an increase R0 rate, better bleeding control and increasing long-term survival for BRPHC are still controversial. We compared a previously reported technique, a modified artery-first approach（MAFA）, with conventional techniques for the surgical treatment of ***： A total of 117 patients with BRPHC undergone pancreaticoduodenectomy（PD） from January 2013 to June 2015 were included. They were divided into an MAFA group（n=78） and a conventional-technique group（n=39）. Background characteristics, operative data and complications were compared between the two ***： Mean operation time was significantly shorter in the MAFA group than that in the conventional-technique group（313 vs 384 min; P=0.014）; mean volume of intraoperative blood loss was significantly lower in the MAFA group than that in the conventional-technique group（534 vs 756 m L; P=0.043）; and mean rate of venous resection was significantly higher in the conventional-technique group than that in the MAFA group（61.5% vs 35.9%; P=0.014）. Pathologic data, early mortality and morbidity were not different significantly between the two ***： MAFA is safe, simple, less time-consuming, less intraoperative blood loss and less venous resection, and therefore, may become a standard surgical approach to PD for BRPHC with the superior mesenteric vein-portal vein involvement but without superior mesenteric artery invasion.

关键词： pancreatic head cancer pancreaticoduodenectomy borderline resectable

Electrochemical Probe of Hydroxylation of 4-Nitro-phenol by Cytochrome C with Hydrogen Peroxide

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Chemical Research in Chinese Universities 1998年第2期14卷 45-51页

作者： zhu yi-min WANG Jin-cheng LI Jing-hong DONG Shao-jun BU Feng-quan Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022 Norma n Bethune Univer sity of Medica l Science Cha ngchun130023

BU Fengquan(Norman Bethune University of Medical Science, Changchun, 130023)(Received Dec. 2, 1996) The reaction of hydrogen peroxide with cytochrome c makes them coupled to lead to the hydroxylation of 4-nitrophenol. In situ electrochemical probe was used to detect the hydroxylation of 4-nitrophenol, which can avoid the tedious extraction procedure, the loss of the active species and the interference of some colored substances in the detection of 4-nitrocatechol by spectroscopic method. The hydroxyl radical scavengers mannitol and sodium benzoate did not eliminate hydroxylation, but the inhibitory effect of uric acid on the hydroxylation lead to the formation of the ferryl species of the protein during the reaction. These studies suggest that the electrochemical probe might efficiently detect the trace 4-nitrocatechol from the onset of the hydroxylation reaction and thus provides a more sensitive tool.

关键词： Hydrogen peroxide Hydroxylation of 4-nitrophenol Cytochrome c

Molecular diversity analysis of Tetradium ruticarpum(Wu zhu Yu) in China based on inter-primer binding site(iPBS) markers and inter-simple sequence repeat(ISSR) markers

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Chinese Journal of Natural Medicines 2018年第1期16卷 1-9页

作者： XU Jing-Yuan zhu Yan yi Ze WU Gang XIE Guo-Yong QIN min-Jian Department of Resources Science of Traditional Chinese Medicines State Key Laboratory of Natural Medicines China Pharmaceutical University

"Wu zhu yu", which is obtained from the dried unripe fruits of Tetradium ruticarpum(A. Jussieu) T. G. Hartley, has been used as a traditional Chinese medicine for treatment of headaches, abdominal colic, and hypertension for thousands of years. The present study was designed to assess the molecular genetic diversity among 25 collected accessions of T. ruticarpum(Wu zhu yu in Chinese) from different areas of China, based on inter-primer binding site(i PBS) markers and inter-simple sequence repeat(ISSR) markers. Thirteen ISSR primers generated 151 amplification bands, of which 130 were polymorphic. Out of 165 bands that were amplified using 10 iPBS primers, 152 were polymorphic. The iPBS markers displayed a higher proportion of polymorphic loci(PPL = 92.5%) than the ISSR markers(PPL = 84.9%). The results showed that T. ruticarpum possessed high loci polymorphism and genetic differentiation occurred in this plant. The combined data of iPBS and ISSR markers scored on 25 accessions produced five clusters that approximately matched the geographic distribution of the species. The results indicated that both iPBS and ISSR markers were reliable and effective tools for analyzing the genetic diversity in T. ruticarpum.

关键词： Genetic diversity Tetradium ruticarpum iPBS Retrotransposon ISSR