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Maximum Thermodynamic Electrical Efficiency of Fuel Cell System and Results for Hydrogen,Methane,and Propane Fuels

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Chinese Journal of Chemical Physics 2018年第3期31卷 325-334,368页

作者： Rui-chao mao Xiao Ru Zi-jing lin Hefei National Laboratory for Physical Sciences at the Microscale and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China

The maximum electrical efficiency of fuel cell system,ηemax, is important for the understanding and development of the fuel cell technology. Attempt is made to build a theory for ηemaxby considering the energy requirement of heating the fuel and air streams to the fuel cell operating temperature T. A general thermodynamic analysis is performed and the energy balances for the overall operating processes of a fuel cell system are established. Explicit expressions for the determination of ηemax are deduced. Unlike the Carnot efficiency,ηemaxis found to be fuel specific. Except for hydrogen fuel, chemical equilibrium calculations are necessary to compute η*** solutions for the chemical equilibrium of alkane fuels are presented. The theoretical model is used to analyze the effects of T and the steam contents of CH4, C3 H8,and H2 on ηemax for systems with various degrees of waste heat *** to the common perception concerning methane and propane fuels, ηemax decreases substantially with the increase of T. Moreover, ηemax of hydrogen fuel can be higher than that of methane and propane fuels for a system with a medium level of waste heat recovery and operated at 700 ℃≤T≤900 ℃.

关键词： Analytical theory Energy balance Nernst potential Fuel utilization Alkane Chemical equilibrium

不同种源文冠果叶片光合特性及光响应特征分析

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内蒙古林业科技 2022年第1期48卷 33-37,52页

作者：曹恭祥杨跃文元光闫茂林史爱君李银祥季蒙内蒙古自治区林业科学研究院内蒙古呼和浩特010010 内蒙古鄂尔多斯森林生态系统国家定位观测研究站内蒙古鄂尔多斯016100 西乌珠穆沁旗林业事业发展中心内蒙古锡林浩特026200 内蒙古自治区大青山自然保护区管理局呼和浩特分局回民区管理站内蒙古呼和浩特010020

为了解不同种源文冠果光合生理特性,本研究利用LI-6400XT光合仪开展了不同种源文冠果苗期的光合特征研究。结果显示:种源内蒙古准格尔旗(NEZZ)、内蒙古敖汉旗(NCAG)叶片光合速率(P_(n))和蒸腾速率(T_(r))日变化呈单峰曲线,种源山西孟县(... 详细信息

为了解不同种源文冠果光合生理特性,本研究利用LI-6400XT光合仪开展了不同种源文冠果苗期的光合特征研究。结果显示:种源内蒙古准格尔旗(NEZZ)、内蒙古敖汉旗(NCAG)叶片光合速率(P_(n))和蒸腾速率(T_(r))日变化呈单峰曲线,种源山西孟县(SYYX)、山东安丘县(SWAQ)叶片P_(n)和T_(r)及种源陕西靖边县(SYJY)叶片T_(r)日变化均呈双峰曲线,表现出明显的光合“午休”现象;不同种源叶片水分利用效率(WUE)变化趋势呈“M”型;文冠果叶片P_(n)对光合有效辐射的响应趋势基本一致,即随着光合有效辐射的增加P_(n)逐渐升高,利用直角双曲线修正模型可较好的估算叶片P_(n)。种源SYYX、SWAQ、SYJY叶片的光合、蒸腾能力较强,而种源NEZZ、NCAG具有较高的WUE,表明其对环境的适应性相对较强。通过对叶片P_(n)、T_(r)、WUE进行分析,5个种源文冠果的适应能力大小依次为NCAG>NEZZ>SYJY>SYYX>SWAQ。结果可为内蒙古西部文冠果栽培以及种源筛选提供理论依据。

关键词：文冠果光合特性光响应特征水分利用效率

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往复式涡环生成装置性能的多目标优化

节能技术 2024年第4期42卷 299-305页

作者：周茂林韩东俞思涌诸磊高燕飞施其乐何纬峰南京航空航天大学能源与动力学院江苏南京210016

为了将涡环更好地应用到送风等流体输送领域,需要提高涡环生成频率以获得更高的流体输送效率。本文设计一种能够提高涡环生成频率的往复式涡环生成装置,该装置在一个活塞运动周期中可以生成两个涡环,有效地利用了活塞往复运动过程中的... 详细信息

为了将涡环更好地应用到送风等流体输送领域,需要提高涡环生成频率以获得更高的流体输送效率。本文设计一种能够提高涡环生成频率的往复式涡环生成装置,该装置在一个活塞运动周期中可以生成两个涡环,有效地利用了活塞往复运动过程中的推力。针对涡环远距离输送的特点,设计并进行实验;基于响应曲面法与NSGA-II算法对往复式涡环生成装置性能进行多目标优化,使其能够将涡环输送更远距离。结果表明:涡环1与涡环2的输送距离难以同时达到最大值,涡环平均输送距离最大为295 cm,相比优化前增加了2.25%;单个涡环输送距离最大为377 cm,相比优化前增加了6.2%。

关键词：涡环生成装置输送距离响应曲面 NSGA-II 多目标优化

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Synthesis, Crystal Structure, and Fluorescent and Thermal Stability Properties of Two New Cobalt(Ⅱ) Complexes with 2,2’-Bipy as Ligand

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Chinese Journal of Structural Chemistry 2019年第5期38卷 769-776,670页

作者： LI Yu-lin YANG Ying-Qun mao Fang-Fang CHEN Zhi-Min Key Laboratory of Functional Metal-organic Compounds of Hunan Province & Key Laboratory of Functional Organometallic Materials of Hunan Province College Hengyang 421008China Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China

Two new cobalt（Ⅱ）complexes[Co2（2,2?-bipy）2（dpa）2（H2O）5]·4H2O（1）and Co（2,2?-bipy）3（SO4）]·7.5H2O（2）have been synthesized with diaphonic acid（H2dpa）and 2,2?-bipyridine（2,2?-bipy）as *** 1,two neighboring cobalt（Ⅱ）ions are linked together by one bridging diaphonic acid group,forming an asymmetric dinuclear structure.1 crystallizes in triclinic,space group ■ with a=9.825（6）,b=13.007（8）,c=19.586（1）?,α=80.773（1）o,β=77.065（1）o,γ=85.902（1）o,Mr=431.4,V=2406.5（3）?3,Dc=1.48 g/cm3,Z=2,μ（MoKα）=0.767 mm-1,F（000）=1112,the final R=0.0379 and wR=*** central cobalt（Ⅱ）ions in 1 and 2 are coordinated with six atoms,forming distorted octahedral coordination *** fluorescence and thermal stability properties of 1 and 2 are also reported.

关键词： cobalt(Ⅱ) complex crystal structure fluorescence thermal stability

Engineering mesoporous bioactive glasses for emerging stimuli-responsive drug delivery and theranostic applications

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Bioactive Materials 2024年第4期34卷 436-462页

作者： Ya Cui Shebin Hong Weidong Jiang Xiaojing Li Xingyu Zhou Xiaoya He Jiaqiang Liu Kaili lin Lixia mao Department of Oral&Cranio-Maxillofacial Surgery Shanghai Ninth People’s HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology&Shanghai Research Institute of StomatologyShanghai200011China

Mesoporous bioactive glasses(MBGs),which belong to the category of modern porous nanomaterials,have garnered significant attention due to their impressive biological activities,appealing physicochemical properties,and desirable morphological *** hold immense potential for utilization in diverse fields,including adsorption,separation,catalysis,bioengineering,and *** possessing interior porous structures,excellent morphological characteristics,and superior biocompatibility,primitive MBGs face challenges related to weak encapsulation efficiency,drug loading,and mechanical strength when applied in biomedical *** is important to note that the advantageous attributes of MBGs can be effectively preserved by incorporating supramolecular assemblies,miscellaneous metal species,and their conjugates into the material surfaces or intrinsic mesoporous *** innovative advancements in these modified colloidal inorganic nanocarriers inspire researchers to explore novel applications,such as stimuli-responsive drug delivery,with exceptional in-vivo *** view of the above,we outline the fabrication process of calcium-silicon-phosphorus based MBGs,followed by discussions on their significant progress in various engineered strategies involving surface functionalization,nanostructures,and network ***,we emphasize the recent advancements in the textural and physicochemical properties of MBGs,along with their theranostic potentials in multiple cancerous and non-cancerous ***,we recapitulate compelling viewpoints,with specific considerations given from bench to bedside.

关键词： Mesoporous bioactive glasses Engineered strategies Nanoarchitectural morphology Biofunctionalization Stimuli-responsive Disease theranostics

The Features and Regulation of Co-transcriptional Splicing in Arabidopsis

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Molecular Plant 2020年第2期13卷 278-294页

作者： Danling Zhu Fei mao Yuanchun Tian Xiaoya lin Lianfeng Gu Hongya Gu Li-jia Qu Yufeng Wu Zhe Wu SUSTech-PKU Institute of Plant and Food Science Department of BiologySouthern University of Science and TechnologyShenzhen 518055China State Key Laboratory for Crop Genetics and Germplasm Enhancement Bioinformatics CenterNanjing Agriculture UniversityNanjingJiangsu 210095China State Key Laboratory of Protein and Plant Gene Research Peking-Tsinghua Center for Life SciencesCollege of Life SciencesPeking UniversityBeijing 100871China Basic Forestry and Proteomics Research Center College of ForestryFujian Agriculture and Forestry UniversityFuzhou 350002China Present address:School of Life Sciences Guangzhou UniversityGuangzhou 510006China

Precursor mRNA(pre-mRNA)splicing is essential for gene expression in most eukaryotic *** studies from mammals,Drosophila,and yeast show that the majority of splicing events occurs *** plants,however,the features of co-transcriptional splicing(CTS)and its regulation still remain largely ***,we used chromatin-bound RNA sequencing to study CTS in Arabidopsis *** found that CTS is widespread in Arabidopsis seedlings,with a large proportion of alternative splicing events determined *** efficiency correlated with gene expression level,the chromatin landscape and,most surprisingly,the number of introns and exons of individual genes,but is independent of gene *** combination with enhanced crosslinking and immunoprecipitation sequencing analysis,we further showed that the hnRNP-like proteins RZ-1B and RZ-1C promote efficient CTS globally through direct binding,frequently to exonic ***,this general effect of RZ-1B/1C on splicing promotion is mainly observed at the chromatin level,not at the mRNA ***-1C promotes CTS of multiple-exon genes in association with its binding to regions both proximal and distal to the regulated *** propose that RZ-1C promotes efficient CTS of genes with multiple exons through cooperative interactions with many exons,introns,and splicing *** work thus reveals important features of CTS in plants and provides methodologies for the investigation of CTS and RNA-binding proteins in plants.

关键词： co-transcriptional splicing CB-RNA-seq eClip-seq RNA binding protein chromatin transcription

海洋细菌Bacillus mojavensis 1A00437 β-1,3-1,4-葡聚糖酶基因的克隆、表达及功能研究

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化学与生物工程 2014年第9期31卷 29-35页

作者：左怀雨王茂淋邵宗泽李光玉徐柳喻子牛张吉斌华中农业大学生命科学技术学院农业微生物学国家重点实验室微生物农药国家工程研究中心湖北武汉430070 国家海洋局第三海洋研究所海洋生物遗传资源重点实验室福建厦门361005

Bacillus mojavensis 1A00437是分离自太平洋的一株芽胞杆菌,成功克隆了该菌的β-1,3-1,4-葡聚糖酶基因并在原核系统获得高效表达。测序结果表明,该基因的ORF全长681bp,编码一条226个氨基酸的蛋白,蛋白大小25.3kDa。该酶的最适pH值及最... 详细信息

Bacillus mojavensis 1A00437是分离自太平洋的一株芽胞杆菌,成功克隆了该菌的β-1,3-1,4-葡聚糖酶基因并在原核系统获得高效表达。测序结果表明,该基因的ORF全长681bp,编码一条226个氨基酸的蛋白,蛋白大小25.3kDa。该酶的最适pH值及最适反应温度分别为6.5、60℃。研究表明,1mmol·L-1 Ca2+、Mn2+可显著抑制该重组酶活性,该重组酶对稻瘟病菌无抗性,但对小麦纹枯病菌及水稻纹枯病菌具有明显抑制作用。饲料体外消化实验表明,该重组酶对稻糠、玉米粉具有显著降解效果。为该酶用作抗真菌剂及饲料添加剂提供了理论基础。

关键词： Bacillus mojavensis 葡聚糖酶基因克隆表达功能饲料添加剂

脑多形性黄色星形细胞瘤8例临床、病理、MRI特征及文献复习

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蚌埠医学院学报 2014年第10期39卷 1401-1406页

作者：张应战张禹秦添王星星徐茂林冯雨婷邓雪飞蚌埠医学院第二附属医院放射科安徽蚌埠233040 中国人民解放军第105医院影像科安徽合肥230031 中国人民解放军第105医院病理科安徽合肥230031 安徽医科大学解剖学教研室安徽合肥230032

目的：提高对脑多形性黄色星形细胞瘤（PXA）临床、病理及MRI特征的认识。方法：回顾性分析8例PXA的MRI表现并复习相关文献,8例脑PXA均经病理证实,均行MRI平扫、增强扫描及扩散加权成像,2例行多体素磁共振波谱（TE135ms）和灌注加权成... 详细信息

目的：提高对脑多形性黄色星形细胞瘤（PXA）临床、病理及MRI特征的认识。方法：回顾性分析8例PXA的MRI表现并复习相关文献,8例脑PXA均经病理证实,均行MRI平扫、增强扫描及扩散加权成像,2例行多体素磁共振波谱（TE135ms）和灌注加权成像检查。结果：8例PXA年龄14-56岁,25岁以下者6例。伴间变特征者2例。7例单发,1例伴间变特征者为单发肿块伴周围子灶。5例发生或累及颞叶,6例位于皮层及皮层下。MRI表现5例呈囊实性,3例呈实性,1例伴局部软脑膜受侵,1例伴出血及室管膜受侵（伴间变特征）,1例伴侧脑室播散（伴间变特征）。肿瘤实性区均呈明显强化的稍长T1稍长T2信号,扩散加权成像呈等或稍高信号,表观扩散系数值与正常皮层下脑白质差异无统计学意义（P〉0.05）。2例囊实性者囊壁强化。所有肿瘤周围均有轻到中度水肿。2例肿瘤实性区呈高灌注,胆碱峰明显升高,N-乙酰天门冬氨酸峰明显下降,多见乳酸峰。结论：PXA好发于青少年,多发生于幕上脑浅部,多位于颞叶,其病理学及遗传学特征有别于其他星形细胞瘤,肿瘤全切是预后的主要保证。PXA的常规MRI、磁共振灌注加权成像和磁共振波谱具有一定特点。

关键词：脑肿瘤星形细胞瘤磁共振成像

The Collins Formula Applied in Optical Image Encryption

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Chinese Physics Letters 2013年第4期30卷 73-76页

作者： CHEN lin-Fei ZHAO Dao-Mu mao Hai-Dan GE Fan GUAN Rui-Xia School of Science Hangzhou Dianzi UniversityHangzhou 310018 Department of Physics Zhejiang UniversityHangzhou 310027 Department of Information Technology and Application Zhejiang Yuying Vocational Technology CollegeHangzhou 310018

We propose a novel method for image encryption,which is realized by the Collins formula with the random shifting *** Collins formula can denote different optical transforms by one expression with different ABCD *** a generalized optical system,the ABCD elements can be randomly chosen,so the keys are increased and the security of the system is ***,some computer simulations are given for different encryption systems to prove the *** encryption effect is good,and people without the correct keys can not obtain the information easily.

关键词： shifting strengthened Collins