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Sequential analysis of dimethyl sulfur compounds in seawater

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Chinese Chemical Letters 2007年第1期18卷 99-102页

作者： Meng li dong xing Yuan Quan Long li Xiao Ying Jin State Key Lab of Marine Environmental Science Xiamen University Environmental Science Research Centre of Xiamen University Xiamen 361005 China

A sequential method for the determination of dimethyl sulfur compounds, including dimethylsulfide （DMS）, dimethylsulfonio- propionate （DMSP） and dimethylsulfoxide （DMSO）, in seawater samples has been developed. Detection limit of 2.5 pmol of DMS in 25 mL sample, corresponding to 0.10 nmol/L, was achieved. Recoveries for dimethyl sulfur compounds were in the range of 68.6- 78.3%. The relative standard deviations （R.S.D.s） for DMS, DMSP and DMSO determination were 3.0, 5.4 and 7.4%, respectively.

关键词： Dimethylsulfide (DMS) Dimethylsulfoniopropionate (DMSP) Dimethylsulfoxide (DMSO) Purge and trap Microwave irradiation Sequential analysis

Roll Shape Setting Technology of Hot Galvanizing and Planishing Mill

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Journal of Iron and Steel Research International 2007年第1期14卷 33-36页

作者： BAI Zhen-hua YANG li-po li xing-dong GU Ting-quan Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 Hebei China College of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China Technique Center Baoshan Iron and Steel Co Ltd Shanghai 210900 China

A roll shape setting model was built for the hot galvanizing and planishing mill. The uniform transversal distributions of the front tension in the exit and the unit pressure were considered as the objective function. At the same time, the quality of the products, the stability of zinc layer, and the homogeneity of spangles were of considerable significance in the planishing process. The model was applied to the roll shape setting of the 1800 cold rolling 3# CGL hot galvanizing and planishing mill of Baosteel Co Ltd. After being planished, the flatness of a strip that was less than 6 I was more than 97%, and the flatness of others were less than 10 I; the pass percentage of the zinc lay- ers reached 100%.

关键词： hot galvanizing planishing mill roll shape optimization

A N-CoSe/CoSe_(2)-C@Cu hierarchical architecture as a current collector-integrated anode for potassium-ion batteries

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Rare Metals 2024年第8期43卷 3702-3712页

作者： Zi-Jie Mu Yan-Jun Gao Wen-Shuai dong Zong-You li Qing-Yi Song Han-Jiao Huang li-dong xing Jian-Guo Zhang Wei Wang Qi-Yao Yu State Key Laboratory of Explosion Science and Technology School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The highly reversible insertion/extraction of large-radius K^+into electrode materials remains a tough goal,especially for con version-type ***,we design a current collector-integrated electrode(N-CoSe/CoSe_(2)-C@Cu) as an advanced anode for potassium-ion battery(PIBs).The conductive CoSe/CoSe_(2) heterojunction with rich Se vacancy defects,conductive sp^2 N-doped carbon layer,and the elastic copper foil matrix can greatly accelerate the electron transfer and enhance the structural ***,the well-designed N-CoSe/CoSe_(2)-C@Cu current collector-integrated electrode displays enhanced potassium storage performance with regard to a high capacity(325.1 mAh·g^(-1) at 0.1 A·g^(-1) after 200cycles),an exceptional rate capability(223.5 mAh·g^(-1) at2000 mA·g^(-1)),and an extraordinary long-term cycle stability(a capacity fading of only 0.019% per cycle over1200 cycles at 2000 mA·g^(-1)).Impressively,ex situ scanning electron microscopy(SEM) characterizations prove that the elastic structure of copper foil is merged into the cleverly designed N-CoSe/CoSe_(2)-C@Cu heterostructure,which buffers the deformation of structure and volume and greatly promotes the cycle life during the potassium/depotassium process.

关键词： Potassium-ion battery Integrated collector electrode CoSe CoSe_2 Heterojunction Copper foil matrix N-doped carbon

Closed-loop prevention and control research of coal mine safety management

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Journal of Coal Science & Engineering(China) 2009年第3期15卷 324-327页

作者： li xing-dong ZHAO Yun-xia ZHAO xing-qiang LU Ying College of Resources and Environmental Engineering Shandong University of Science and Technology Qingdao 271019 China Department of Management Faculty of Business and Economics Monash University Melbourne VIC 3168 Australia

According to the current problems of safety management processes in coalmine enterprises,we introduced barrel theory to coal mine safety management,constructedthe closed-loop structure of a coal mine safety management system,andpointed out that efficient safety management lies in three factors:safety quality of all ofthe staff in coal mine enterprises,weak links in security management systems,and cooperationamong *** conducting detailed analysis of these three factors,we proposed concrete ways of preventing and controlling potential safety hazards duringthe process of coal mine production.

关键词： closed-loop structure prevention and control security management wooden barrel theory

Design and optimization of carbon materials as anodes for advanced potassium-ion storage

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Rare Metals 2024年第11期43卷 5516-5548页

作者： Xiang liu Jian-Hua Chu Zi-Xian Wang Shao-Wei Hu Zi-Yi Cheng Ke-Ning liu Chao-Jie Zhang li-Qiang Zhang li-dong xing Wei Wang School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243032China School of Metallurgy and Ecology University of Science and Technology BeijingBeijing 100083China

With the swift advancement of renewable energy and escalating demands for energy storage,potassium-ion batteries(PIBs)are increasingly recognized as a potent energy storage techn *** carbon anode materials have been utilized for PIBs anodes owing to their superior K^(+)storage capacity,outstanding cycling performance,elevated capacity,and ***,it is imperative to explore and improve carbon anode *** review meticulously encapsulates the recent scholarly advancements in carbon anode materials for *** elucidates the operational mechanisms of carbon anode for PIBs,provides a synopsis of diverse carbon materials,and deliberates on the prevalent challenges,including cycling stability and potassium-ion diffusion *** soft and hard carbon augmented potassiumion capacities,the expansive surface areas coupled with the large ionic radius of K^(+)pose substantial challenges to their structural design and ***,this review outlines strategic approaches to the design of carbon materials for excellent potassium storage performance,including the expansion of interlayer spacing,modification of morphology,heteroatom doping,structural defect regulation,incorporation of porous structures,and development of carbon-carbon ***,the challenges and prospective solutions of carbon anode materials for PIBs with superior energy density and cycling stability were proposed,providing a reasonable guidance for regulation design of carbon materials.

关键词： Potassium-ion batteries Carbon anode Storage mechanism Optimization strategies Electrochemical performance

Validation and Evaluation of a Mechanistic Model of Phasic and Phenological Development in Wheat

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Agricultural Sciences in China 2001年第1期 77-82页

作者： YAN Mei-chun CAO Wei-xing li Cun-dong WANG Zhao-long Ministry of Agriculture Key Laboratory of Crop Growth Regulation Nanjing Agricultural University Nanjing 210095 Ministry of Agriculture Key Laboratory of Crop Growth Regulation Nanjing Agricultural University Nanjing 210095 Ministry of Agriculture Key Laboratory of Crop Growth Regulation Nanjing Agricultural University Nanjing 210095 Ministry of Agriculture Key Laboratory of Crop Growth Regulation Nanjing Agricultural University Nanjing 210095

Three sets of data from the field experiments with different wheat( Triticum L. ) varieties and sowing dates in China and USA were used to test the performance of the mechanistic model of wheat development. The results showed that the absolute prediction errors for most phasic and phenological stages ranged within 0 - 5 days, and the root mean square errors were generally less than 5 days. The model was of high accuracy and low error especially for emergence, tillering, stamen and pistil initiation, and heading stages, reflecting an enhanced level of mechanism and prediction.

关键词： Wheat Development stages Mechanistic model Validation

基于非负支持域递归逆滤波技术的湍流退化图像复原算法

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宇航学报 2009年第5期30卷 2062-2067页

作者：李东兴赵剡许东北京航空航天大学仪器科学与光电工程学院北京100191 山东理工大学机械工程学院淄博255049

在常规图像复原算法中,成像系统的点扩展函数和观测噪声被认为是先验信息。当飞行器在大气层内高速或超高速飞行时,会产生气动光学效应,严重影响成像制导系统的成像质量,在这种情况下,降晰函数和观测噪声是未知信息。为有效复原湍流退... 详细信息

在常规图像复原算法中,成像系统的点扩展函数和观测噪声被认为是先验信息。当飞行器在大气层内高速或超高速飞行时,会产生气动光学效应,严重影响成像制导系统的成像质量,在这种情况下,降晰函数和观测噪声是未知信息。为有效复原湍流退化图像,提出了基于非负支持域递归逆滤波技术的湍流退化图像复原算法,该算法可同时辨识递归滤波器的参数。非负支持域递归逆滤波技术适用于视场背景为单一的黑色、灰色或白色并且支持域确定的目标图像的复原及相应滤波器参数的辨识。提出的算法首先将湍流退化图像通过一个空域高通有限脉冲响应滤波器,以滤除部分因噪声引起的模糊信息,然后将首次滤波后的图像进行递归逆滤波,同时共轭梯度算法用于最小化非负支持域递归逆滤波凸集价格函数。该算法用于复原风洞测试图像,实验结果表明,复原效果有明显的改进。

关键词：降晰函数辨识湍流退化图像非负支持域约束递归逆滤波图像复原

基于参数估计的降晰函数辨识及图像复原算法(英文)

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红外与激光工程 2010年第1期39卷 166-172页

作者：李东兴赵剡许东北京航空航天大学仪器科学与光电工程学院北京100191 山东理工大学机械工程学院山东淄博255049

成像系统的点扩展函数(PSF)以及观测噪声,在一般应用过程中是未知信息,因此,点扩展函数的辨识是一个具有挑战性的世界难题。为解决实际工作中遇到的在已知降晰类型情况下的降晰函数辨识和降晰图像复原问题,提出了基于参数估计的降晰函... 详细信息

成像系统的点扩展函数(PSF)以及观测噪声,在一般应用过程中是未知信息,因此,点扩展函数的辨识是一个具有挑战性的世界难题。为解决实际工作中遇到的在已知降晰类型情况下的降晰函数辨识和降晰图像复原问题,提出了基于参数估计的降晰函数辨识及降晰图像复原算法。首先,由初始猜测给定降晰函数参数的变化范围和参数的增量步长;然后,最小化降晰图像和由相应点扩展函数及降晰图像得到的实验观测图像的差的Frobenius范数,以确定点扩展函数的参数,进而确定降晰图像的点扩展函数并对降晰图像进行复原。应用基于Wiener滤波的频域循环边界算法对降晰图像进行复原。实验结果表明:在降晰图像信噪比较高的情况下,降晰函数的辨识结果是可靠和准确的,有较好的复原效果。

关键词：模糊辨识图像复原参数估计 Wiener滤波 Frobenius范数

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作为教育生活实验的教育哲学教学

教育学报 2017年第4期13卷 37-44页

作者：李醒东河南师范大学教育学院河南新乡453007

人们在理解和把握世界过程中表现出来的彻底主义精神,是推动知识生产的精神动力,也就是哲学的精神气质。秉持该种精神气质,围绕影响人发展的现实存在,以教育学的立场来理解世界,构成了教育哲学研究的主要内容。教育哲学的教学活动,是引... 详细信息

人们在理解和把握世界过程中表现出来的彻底主义精神,是推动知识生产的精神动力,也就是哲学的精神气质。秉持该种精神气质,围绕影响人发展的现实存在,以教育学的立场来理解世界,构成了教育哲学研究的主要内容。教育哲学的教学活动,是引导学生对教育问题持续思考的过程,帮助实现对自我及社会存在的教育性觉解。在坚持对哲学精神与教育视界的理解基础上,针对原有的课堂教学弊端,不断革新教学方式。变革的尝试不只是突破既有知识框架、理论体系及学科边界,丰富教育哲学的教学内容,更在于将存在本身及周身事物的理解作为教育观念建构的核心,引导学生过一种有意义的精神生活,体验教育生活方式选择中的智慧。这既是教育哲学的使命,也是教育哲学从教者的学术担当。

关键词：教育哲学教育生活教学形式