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Science China(Technological Sciences) 2021年第10期64卷 2153-2165页

作者： TONGSH Chasen liANG YiQi XIE Xu li lincai liU Zhi DU Qing JIAO Kui State Key Laboratory of Engines Tianjin UniversityTianjin 300350China

The flow field is a pivotal part to manage the transport of water and gas in proton exchange membrane fuel ***,the reported water measurement methods(e.g.,X-ray and electrochemical impedance spectroscopy(EIS))cannot give a comprehensive understanding water distribution in the flow field,resulting in challenges in optimizing the channel design and enhancing fuel cell ***,we propose a water measurement method combining the X-ray radiography with EIS to investigate the effect of different operating conditions on the growth law and distribution of liquid water in parallel and serpentine flow *** attenuation coefficient of liquid water to X-ray is calibrated with constant tube-current and tubevoltage of X-ray ***,the parallel flow field with hydrophobic treatment is *** results show that the water accumulation of the parallel flow field is far more than the serpentine flow field,and the water content of the middle region is higher than that of other regions in the parallel flow ***,operating conditions(cathode inlet gas flow rate,inlet gas humidity,and back pressure)have little effect on the liquid water content of the middle region in the parallel flow *** polarization curve,EIS result,and X-ray radiography show that the performance and water drainage capacity of the hydrophobic parallel flow field are better than the normal one.

关键词： proton exchange membrane fuel cell water management flow field X-ray EIS

Comparative techno-economic analysis of large-scale renewable energy storage technologies

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Energy and AI 2023年第4期14卷 271-282页

作者： lincai li Bowen Wang Kui Jiao Meng Ni Qing Du Yanli liu Bin li Guowei ling Chengshan Wang National Industry-Education Platform of Energy Storage Tianjin UniversityTianjinChina State Key Laboratory of Engines Tianjin UniversityTianjinChina Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjinChina State Key Laboratory of Chemical Engineering Tianjin UniversityTianjinChina Department of Building and Real Estate Research Institute for Sustainable Urban Development(RISUD)Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Energy storage is an effective way to address the instability of renewable energy generation modes,such as wind and solar,which are projected to play an important role in the sustainable and low-carbon *** and carbon emissions are important indicators that should be thoroughly considered for evaluating the feasibility of energy storage technologies(ESTs).In this study,we study two promising routes for large-scale renewable energy storage,electrochemical energy storage(EES)and hydrogen energy storage(HES),via technical analysis of the *** levelized cost of storage(LCOS),carbon emissions and uncertainty assessments for EESs and HESs over the life cycle are conducted with full consideration of the critical links for these *** order to reduce the evaluation error,we use the Monte Carlo method to derive a large number of data for estimating the economy and carbon emission level of ESTs based on the collected *** results show that lithium ion(li-ion)batteries show the lowest LCOS and carbon emissions,at 0.314 US$kWh-1 and 72.76 g CO_(2) e kWh^(-1),compared with other batteries for *** HES routes,meaning different combinations of hydrogen production,delivery and refueling methods,show substantial differences in economics,and the lowest LCOS and carbon emissions,at 0.227 US$kWh^(-1) and 61.63 gCO_(2) e kWh^(-1),are achieved using HES routes that involve hydrogen production by alkaline electrolyzer(AE),delivery by hydrogen pipeline and corresponding *** findings of this study suggest that HES and EES have comparable levels of economics and carbon emissions that should be both considered for large-scale renewable energy storage to achieve future decarbonization goals.

关键词： Large-scale renewable energy storage Techno-economic analysis Carbon emissions Electrochemical energy storage Hydrogen energy storage

N,O-配体钴化合物的合成及其环氧丙烷羰化酯化的催化性能

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有机化学 2023年第11期43卷 3907-3915页

作者：李泽辉邹昊宇李林才赵怡玲朱红平厦门大学化学化工学院固体表面物理化学国家重点实验室厦门361005

合成了9种N,O-配体化合物L^(1)~L^(9).化合物L^(1)~L^(4)分别与0.5 ***_(2)(CO)_(8)发生氧化还原配位反应生成中性单核钴化合物1~4;L^(5)~L^(7)分别与1 ***_(2)(CO)_(8)发生歧化和氧化还原配位反应;L8与5/6 ***_(2)(CO)_(8)以及***和0.4 equiv.H_(2)O发生歧化和氧化还原配位反应;L^(9)与0.5 ***_(2)(CO)_(8)发生歧化配位反应生成同钴核离子对化合物5~9.这些化合物中的阴离子均为[Co(CO)4]-.相应地,化合物8中的阳离子是三核钴簇,其它化合物中的阳离子都是单核钴.化合物1~9通过FT-IR谱学表征和元素分析数据确定,其中1和8进一步经过X射线单晶结构确认.考察了化合物1~9催化环氧丙烷(PO)羰化酯化的性能,获得42.6%~99.0%的PO转化率和34.1%~88.6%的β-羟基丁酸甲酯(HMB)总产率.研究了8和9随时间变化的催化反应,推测了同钴核离子对协同作用的催化反应机理.

关键词： N,O-配体钴化合物羰化酯化催化性能环氧丙烷(PO) β-羟基丁酸甲酯同钴核离子对催化机理

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镧改性Cu/SiO_(2)催化剂的乙酸甲酯高效加氢催化性能研究

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燃料化学学报（中英文） 2024年第2期52卷 131-139页

作者：张传明李伟杰康金灿林丽娜李昌鑫李林才邹昊宇朱红平厦门大学化学化工学院固体表面物理化学国家重点实验室醇醚酯化工清洁生产国家工程实验室福建厦门361005

采用蒸氨法制备了镧(La)改性的负载型铜硅(Cu/SiO_(2))催化剂,并对其乙酸甲酯(MeOAc)气相加氢制乙醇(EtOH)的催化性能进行了研究。采用N2吸附-脱附(N2adsorption-desorption)、X射线粉末衍射(XRD)、电感耦合等离子体发射光谱(ICP-OES)... 详细信息

采用蒸氨法制备了镧(La)改性的负载型铜硅(Cu/SiO_(2))催化剂,并对其乙酸甲酯(MeOAc)气相加氢制乙醇(EtOH)的催化性能进行了研究。采用N2吸附-脱附(N2adsorption-desorption)、X射线粉末衍射(XRD)、电感耦合等离子体发射光谱(ICP-OES)、氢气程序升温还原(H2-TPR)、傅里叶红外光谱(FT-IR)、高分辨透射电镜(HRTEM)、光电子能谱(XPS)和原子发射光谱仪(AES)等手段对催化剂进行了的表征,发现La物种的加入产生了较多的层状硅酸铜,增强了Cu和La物种之间的相互作用。La物种的加入在结构方面提高了催化剂的比表面积,降低了铜物种的粒径,提高了铜物种的分散度;在电子还原调控方面提高了Cu+的含量,增强了催化剂吸附酰基和甲氧基的能力。与未改性的Cu/SiO_(2)催化剂相比,镧改性后Cu/SiO_(2)催化剂的乙酸甲酯加氢性能得到大幅提升;其中La掺杂量0.5%的Cu/SiO_(2)催化剂表现出最佳的催化性能,乙酸甲酯转化率达98.5%,乙醇的总收率为97.0%。

关键词：乙酸甲酯加氢乙醇 Cu/SiO_(2) La改性

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基于PI调节的三相数字锁相环研究与实现

新技术新工艺 2012年第2期 65-69页

作者：李林才陈艳峰华南理工大学广东广州510640

介绍了一种用于不间断电源的数字锁相环,基于PI调节控制,利用PI调节器输出的误差角频率与DSP定时器计数值的对应,产生定时器中断,在调节时加固定角度偏移,完成锁相。Matlab仿真证实了所用锁相环的快速响应与较高鲁棒性。基于TI公司的DSP... 详细信息

介绍了一种用于不间断电源的数字锁相环,基于PI调节控制,利用PI调节器输出的误差角频率与DSP定时器计数值的对应,产生定时器中断,在调节时加固定角度偏移,完成锁相。Matlab仿真证实了所用锁相环的快速响应与较高鲁棒性。基于TI公司的DSP2812的锁相环程序,通过样机测试,证实了该方法的可行性。

关键词：不间断电源 DSP 数字锁相环

基于因子分析的卷积神经网络模型压缩算法研究

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昆明理工大学学报（自然科学版） 2024年第2期49卷 207-214页

作者：刘冬冬李林才句媛媛吴刘仓肖清泰昆明理工大学理学院云南昆明650500 昆明理工大学理学院工业工程重点实验室云南昆明650500 昆明理工大学应用统计学研究中心云南昆明650500 昆明理工大学冶金与能源工程学院云南昆明650093

针对复杂的卷积神经网络模型存在参数规模大、运算时间长等问题,提出一种有效的卷积神经网络模型压缩算法.该算法引入因子分析的思想对卷积神经网络模型进行压缩:首先将四维的卷积核权重张量转化为二维的矩阵形式,计算相关矩阵,并对其... 详细信息

针对复杂的卷积神经网络模型存在参数规模大、运算时间长等问题,提出一种有效的卷积神经网络模型压缩算法.该算法引入因子分析的思想对卷积神经网络模型进行压缩:首先将四维的卷积核权重张量转化为二维的矩阵形式,计算相关矩阵,并对其进行奇异值分解;其次,通过控制累积方差贡献率,确定适当的因子数量,计算因子载荷矩阵;最后,重构出更具代表性的卷积核.通过在Catdog、CIFAR10、CIFAR100三个数据集上进行验证,实验结果表明:该压缩算法能够在保证卷积神经网络精度的前提下,使AlexNet、ResNet的参数压缩率达到30.7%~68.2%,运行时间减少17.53%~37.21%.从而验证了本文提出的算法在压缩率和运算效率方面的优势,为基于因子分析的卷积神经网络模型压缩提供了一种可能的框架.

关键词：模型压缩因子分析卷积神经网络图像分类

Notch信号通路调控间充质干细胞的增殖与分化

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中国组织工程研究 2024年第19期28卷 3076-3083页

作者：王雪淞周林李林材邹征伟唐兴坤卢文明陈文杰汪月叶俊松赣南医学院第一附属医院干细胞临床转化分中心江西省赣州市341000 赣南医学院康复学院江西省赣州市341000 赣州市干细胞与再生医学重点实验室江西省赣州市341000 赣南医学院江西省医用组织工程材料与生物制造重点实验室江西省赣州市341000 赣南医学院心脑血管疾病防治教育部重点实验室江西省赣州市341000 赣南医学院护理学院江西省赣州市341000

背景:研究发现,Notch的配体和受体都是细胞膜表面蛋白,是介导细胞间通讯的一种重要蛋白,Notch信号通路在间充质干细胞增殖与分化过程中起着至关重要的调控作用。目的:就Notch信号通路对间充质干细胞增殖与分化过程的调节机制进行综述,... 详细信息

背景:研究发现,Notch的配体和受体都是细胞膜表面蛋白,是介导细胞间通讯的一种重要蛋白,Notch信号通路在间充质干细胞增殖与分化过程中起着至关重要的调控作用。目的:就Notch信号通路对间充质干细胞增殖与分化过程的调节机制进行综述,总结和阐述Notch信号通路如何调控间充质干细胞的增殖与分化相关研究进展,为未来利用干细胞治疗各种相关疾病提供理论支持。方法:由第一作者应用计算机在中国知网、万方、维普、PubMed、Web of Science和Nature数据库检索涉及Notch信号通路调控间充质干细胞增殖与分化的相关文献,中文检索词为“间充质干细胞,Notch,Notch信号通路,增殖,分化”,英文检索词为“mesenchymal stem cells,MSC,Notch,Notch signaling pathway,proliferation,differentiation”,结合文献追溯法查找部分文献,最终纳入87篇文献进入综述分析。结果与结论:①Notch信号通路是一条存在于多细胞生物中保守的信号通路,通过受体与配体结合介导相邻细胞间的通信,在调节细胞分化、增殖、凋亡和细胞周期中发挥重要作用。②间充质干细胞是一类具有自我增殖和多向分化潜能的成体干细胞,可受外界信号通路的调控从而影响其增殖与分化,而Notch信号通路作为其中之一,当Notch配体被激活后,Notch蛋白会经历2次蛋白水解裂解,释放出Notch细胞内结构域NICD随后进入细胞核,进而促进靶基因的转录以达到调控骨髓、脂肪和脐带等不同来源的间充质干细胞增殖与分化的作用,但是调控同物种不同组织来源间充质干细胞在增殖与分化过程中的具体机制有所不同。③Notch信号通路可以调控间充质干细胞分化成不同的靶细胞,但是由于分化的靶细胞不同,Notch信号通路的受体或配体表达水平有差异。④临床上以Notch信号通路为靶点,促进间充质干细胞治疗各种难治性疾病,如再生障碍性贫血症、严重的关节损伤、缺血性脑卒中和心肌梗死等都有很好的应用前景。⑤通过探究Notch信号通路调控大鼠、小鼠和人的骨髓间充质干细胞受体及配体的表达水平,不同物种来源的间充质干细胞其Notch信号通路在增殖与分化的过程中的调控作用也有所不同。⑥间充质干细胞因其安全、免疫排斥性低及治疗前景广等优势在组织工程中的作用逐渐凸显,Notch信号通路调控间充质干细胞增殖与分化的影响因素繁多,后续研究应进一步优化影响因素变量,探索调控间充质干细胞增殖与分化的标准化研究。

关键词： Notch信号通路信号通路干细胞间充质干细胞临床意义细胞命运增殖分化综述

Effects of carbon dioxide and nitrogen on adhesive growth and expressions of E-cadherin and VEGF of human colon cancer cell CCL-228

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World Journal of Gastroenterology 2003年第7期9卷 1594-1597页

作者： Kai-lincai Guo-BingWang li-JuanXiong GeneralSurgeryDepartment UnionHospitalTongjiMedicalCollegeHuazhongUniversityofScienceandTechnologyWuhan430022HubeiProvinceChina li--JuanXiong InfectiousDiseaseDepartmentUnionHospitalTongjiMedicalCollegeHuazhongUniversityofScienceandTechnologyWuhan430022HubeiProvinceChina

AIM: To study the effects of carbon dioxide on the metastatic capability of cancer cells, and to compare them with that of ***: The colon cancer cell CCL-228 was treated with 100 % carbon dioxide or nitrogen at different time points and then cultured under normal condition. Twelve hours after the treatment, the survival rates of suspension cells and the expressions of e-cadherin and VEGF were ***: After 60 min of carbon dioxide and longer time of nitrogen treatment, the suspended cells increased and the expression of e-cadherin decreased while the expression of VEGF was enhanced significantly. And the effects of nitrogen were similar to, but weaker than, those of carbon ***: Carbon dioxide may improve the metastatic capability of cancer cells and its effects are significantly stronger than that of nitrogen. A sequential use of carbon dioxide and nitrogen in pneumoperitoneum may take the advantage of both gases.

关键词：结肠癌 E-钙粘素血管内皮生长因子二氧化碳氮

Synthesis, isolation and characterization of methyl levulinate from cellulose catalyzed by extremely low concentration acid

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Journal of Energy Chemistry 2013年第6期22卷 895-901页

作者： Hui li lincai Peng Lu lin Keli Chen Heng Zhang Faculty of Chemical Engineering Kunming University of Science and Technology State Key Laboratory of Pulp and Paper Engineering South China University of Technology School of Energy Research Xiamen University

A direct synthesis of methyl levulinate from cellulose alcoholysis in methanol medium under mild condition(180 210 C)catalyzed by extremely low concentration sulfuric acid(0.01 mol/L)and the product isolation were developed in this *** of different process variables towards the catalytic performance were performed as a function of reaction *** results indicated that sulfuric acid concentration,temperature and initial cellulose concentration had significant effects on the synthesis of methyl *** optimized yield of around 50%was achieved at 210 C for 120 min with sulfuric acid concentration of 0.01 mol/L and initial cellulose concentration below 100 g/*** resulting product mixture was isolated by a distillation technique that combines an atmospheric distillation with a vacuum distillation where n-dodecane was added to help distill the heavy *** light fraction including mainly methanol could be reused as the reaction medium without any substantial change in the yield of methyl *** chemical composition and structural of lower heavy fraction were characterized by GC/MS,FTIR,1H-NMR and13C-NMR *** levulinate was found to be a major ingredient of lower heavy fraction with the content over 96%.This pathway is efficient,environmentally benign and economical for the production of pure levulinate esters from cellulose.

关键词： cellulose methyl levulinate extremely low acid catalysis alcoholysis isolation

ERROR PROCESSING METHOD OF CYCLOIDAL GEAR MEASUREMENT USING 3D COORDINATES MEASURING MACHINE

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Chinese Journal of Mechanical Engineering 1998年第3期11卷 33-37页

作者： Zhai, Haiyun li, Zhen Chen, lincai Bi, Fengjie Tianjin Univ Tianjin China

An error processing method is presented based on optimization theory and microcomputer technique which can be successfully used in the cycloidal gear measurement on three dimensional coordinates measuring machine (CMM). In the procedure, the minimum quadratic sum of the normal deviation is used as the object function and the equidistant curve is dealed with instead of the teeth profile. CMM is a high accurate measuring machine which can provide a way to evaluate the accuracy of the cycloidal gear completely.

关键词： Cycloidal gear Errors CMM Error processing method