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Terminalic Acid, a New Tannin from the Fruit of Terminalia chebula

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Chinese Chemical Letters 1998年第9期9卷 827-828页

作者： Yan Ze LIU Bing Wu YU gang ding (Department of Phytochemistry, Henan College of Traditional ChineseMedicine, Zhengzhou 450003),Yang Jie WU (Department of Organic Chemistry, Zhengzhou University Zhengzhou, 450052) Department of Phytochemistry Henan Coll. Traditional Chinese Med. Zhengzhou 450003 China Department of Organic Chemistry Zhengzhou University Zhengzhou 450052 China

Terminalic acid 1, a new hydrolysable tannin, was isolated from the fruit of Terminalia chebula. Its structure was found to be 1-O-galloyl-2,4-chebuloyl-beta-D-glucopyranose by chemical method and H-1-NMR, C-13-NMR, H... 详细信息

关键词： Terminalia chebula hydrolysable tannins terminalic acid

Expression of three essential antioxidants of Helicobacter pylori in clinical isolates

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第5期15卷 500-506页

作者： Yan-yan SHI Mo CHEN Yue-xia ZHANG Jing ZHANG Shi-gang ding Department of Gastroenterology Peking University Third Hospital

Objective： Helicobacterpylori maintains long-term persistence in the host and combats oxidative stress via many antioxidant proteins, which are expected to be relevant to bacterial-associated gastric diseases. We aimed to investigate the expression of three essential antioxidants in H. pylori strains isolated from patients with different clinical outcomes. Methods： Forty H. py/ori strains were isolated from endoscopic biopsy specimens of gastric mucosa from 13 patients with gastric cancer, 13 with peptic ulcer, and 14 with gastritis. The expression of thioredoxin 1 （Trx1）, arginase （RocF）, and alkyl hydroperoxide reductase （AhpC） in H. py/ori was measured by real-time PCR. Comparisons among multiple sample sets were analyzed using a one-way ANOVA test. Pearson＇s correlation test was used to assess relationships among multiple continuous variables. Results： Trx1 expression of H. pylon in gastric cancer and peptic ulcer tissues was higher than that in tissues with gastritis. RocF expression of H. py/ori in gastric cancer tissues was higher than that in tissues exhibiting peptic ulcer and gastritis. However, we did not find any differences in AhpC expression in samples from patients with different clinical outcomes. The expression of Trx1 and RocF had a positive, linear correlation. The expression of Trx1 and AhpC had a positive correlation without a linear trend. We found no correlation between the expression of RocF and AhpC. Conclusions： Our observations indicate that the expression of Trx1 and RocF in H. py/ori might be related to gastric carcinogenesis. In hi. pylori, the expression of members of the antioxidant system may be correlated and relevant to gastric cancer.

关键词： Antioxidant Gastric cancer Helicobacter pylori Oxidative stress

Development of Bi/Er co-doped optical fibers for ultra-broadband photonic applications

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Frontiers of Optoelectronics 2018年第1期11卷 37-52页

作者： Yanhua LUO Binbin YAN Jianzhong ZHANG Jianxiang WEN Jun HE gang-ding PENG Photonics & Optical Communications School of Electrical Engineering University of New South Wales Sydney 2052 NSW Australia Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University Shanghai 200072 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 China Key Lab of In-fiber Integrated Optics Ministry of Education Harbin Engineering University Harbin 150001 China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 China

Targeting the huge unused bandwidth（BW）of modem telecommunication networks,Bi/Er co-doped silica optical fibers（BEDFs）have been proposed and developed for ultra-broadband,high-gain optical amplifiers covering the 1150-1700 nm wavelength *** luminescence has been demonstrated in both BEDFs and bismuth/erbium/ytterbium co-doped optical fibers（BEYDFs）fabricated with the modified chemical vapor deposition（MCVD）and in situ doping *** novel and sophisticated techniques have been developed for the fabrication and characterization of the new active *** controlling the performance of the active fibers,post-treatment processes using high temperature,γ-radiation,and laser light have been *** many fundamental scientific and technological issues and challenges still remain,several photonic applications,such as fiber sensing,fiber gratings,fiber amplification,fiber lasers,etc.,have already been demonstrated.

关键词： Bi/Er co-doped optical fiber (BEDF) broadband emission bismuth-related active center (BAC),modified chemical vapor deposition (MCVD) fiber amplifier fiber sensing

0Optimized Fluoroscopy Setting and Appropriate Project Position Can Reduce X-ray Radiation Doses Rates during Electrophysiology Procedures

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Chinese Medical Journal 2015年第9期128卷 1151-1153页

作者： Bing-Bo Hou Yan Yao Ling-Min Wu Yu Qiao Li-Hui Zheng Li-gang ding gang Chen State Key Laboratory of Cardiovascular Disease Fuwai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China

Background：Nonfluoroscopic three-dimensional electroanatomical system is widely used nowadays,but X-ray remains indispensable for complex electrophysiology *** study aimed to evaluate the value of optimized parameter setting and different projection position to reduce X-ray radiation dose ***：From June 2013 to October 2013,105 consecutive patients who underwent complex ablation were enrolled in the *** the ablation,the radiation dose rates were measured by two different settings （default setting and optimized setting） with three projection positions （posteroanterior [PA] projection;left anterior oblique [LAO] 30° projection;and LAO 45° projection）.The parameter of preset voltage,pulse width,critical voltage,peak voltage,noise reduction,edge enhancement,pulse rate,and dose per frame was modified in the optimized ***：The optimized setting reduced radiation dose rates by 87.5％（1.7 Gy/min vs.13.6 Gy/min,P ＜ 0.001） in PA,87.3％（2.5 Gy/min vs.19.7 Gy/min,P＜0.001） in LAO 30°,85.9％（3.1 Gy/min vs.22.1 Gy/min,P ＜ 0.001） in LAO 45°.Increase the angle of projection position will increase the radiation dose ***：We can reduce X-ray radiation dose rates by adjusting the parameter setting of X-ray *** oblique projection of large angle is another way to reduce X-ray radiation dose rates.

关键词： Ablation Fluoroscopy Projection Position Radiation Dose

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基于模式匹配的模糊控制算法

清华大学学报（自然科学版） 2000年第3期40卷 72-75页

作者：张曾科丁刚清华大学自动化系北京100084

提出了一种新的模糊控制算法 ,传统的模糊控制算法是基于模糊逻辑推理的 ,而这种算法是基于模式匹配的。对于模糊控制器的模型 ,定义了模糊集合匹配度和模糊规则匹配度 ,在此基础上给出了基于模式匹配的模糊控制算法的模型和设计步骤。... 详细信息

提出了一种新的模糊控制算法 ,传统的模糊控制算法是基于模糊逻辑推理的 ,而这种算法是基于模式匹配的。对于模糊控制器的模型 ,定义了模糊集合匹配度和模糊规则匹配度 ,在此基础上给出了基于模式匹配的模糊控制算法的模型和设计步骤。就该算法与经典模糊控制算法的联系进行了讨论 ,证明它包含了经典模糊控制中最常用的 Mamdani和 L arsen算法。另外 ,还定义了更为简便的算法。最后给出了这种算法的仿真实验结果 ,结果表明该算法是可行的、有效的。

关键词：模糊控制模式匹配模糊集合匹配度算法

Energetic,bio-oil,biochar,and ash performances of co-pyrolysis-gasification of textile dyeing sludge and Chinese medicine residues in response to K_(2)CO_(3),atmosphere type,blend ratio,and temperature

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Journal of Environmental Sciences 2024年第2期136卷 133-150页

作者： gang Zhang Zhiyun Chen Tao Chen Shaojun Jiang Fatih Evrendilek Shengzheng Huang Xiaojie Tang Ziyi ding Yao He Wuming Xie Jingyong Liu Engineering Research Center of None-food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education Institutes Dongguan University of TechnologyDongguan 523808China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China School of Environment The Environmental Research InstituteMOE Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China Department of Environmental Engineering Bolu Abant Izzet Baysal UniversityBolu 14052Turkey

Hazardous waste stream needs to be managed so as not to exceed stock-and rate-limited properties of its recipient *** co-pyrolysis of Chinese medicine residue(CMR)and textile dyeing sludge(TDS)and its bio-oil,biochar,and ash quality and quantity were characterized as a function of the immersion of K_(2)CO_(3),atmosphere type,blend ratio,and *** to the mono-pyrolysis of TDS,its co-pyrolysis performance with CMR(the comprehensive performance index(CPI))significantly improved by 33.9%in the N_(2)atmosphere and 33.2%in the CO_(2)*** impregnation catalyzed the co-pyrolysis at 370℃,reduced its activation energy by 77.3 kJ/mol in the N_(2)atmosphere and 134.6 kJ/mol in the CO_(2)atmosphere,and enriched the degree of coke gasification by 44.25%in the CO_(2)*** impregnation increased the decomposition rate of the co-pyrolysis by weakening the bond energy of fatty side chains and bridge bonds,its catalytic and secondary products,and its bio-oil yield by 66.19%.Its bio-oils mainly contained olefins,aromatic structural substances,and *** immersion of K_(2)CO_(3)improved the aromaticity of the copyrolytic biochars and reduced the contact between K and Si which made it convenient for Mg to react with SiO_(2)to form *** co-pyrolytic biochar surfaces mainly included-OH,-CH_(2),C=C,and *** main phases in the co-pyrolytic ash included Ca_(5)(PO_(4))_(3)(OH),Al_(2)O_(3),and magnesium-silicate.

关键词： Chemical impregnation Catalytic pyrolysis Chinese medicine residue Textile dyeing sludge Co-pyrolysis

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基于技术的教学：如何重新定位教师角色

现代远程教育研究 2017年第3期29卷 44-49页

作者：丁钢华东师范大学教育高等研究院上海200062

新技术融入教学并促进教学方式的转变,已经成为必然趋势。一方面,数字土著已经成为学校学习的主体;另一方面,学校信息技术的应用与推广还不理想。这给教师的专业性和角色带来前所未有的挑战。教师需要重新定位自己的专业角色,转变对技... 详细信息

新技术融入教学并促进教学方式的转变,已经成为必然趋势。一方面,数字土著已经成为学校学习的主体;另一方面,学校信息技术的应用与推广还不理想。这给教师的专业性和角色带来前所未有的挑战。教师需要重新定位自己的专业角色,转变对技术介入的态度和观念,在充分理解信息技术对于教学变革实际意义的基础上,创设技术融入的情境,让新技术的运用渗透到个体学习的整个过程中,使"基于技术的教学"成为教师教学新的内涵特征与表现方式。当新技术在与教学的融合之中形成转变教学方式的重要组成部分,基于技术的教学必将成为教师教学的核心能力之一。由此,教师需要更新教学观念以促进个性化学习,重构教学空间以改变学习方式,改进教学方法以提升教学效果,使新技术有机地融入教师的培养和培训中,转变教师专业发展的理念。

关键词：基于技术的教学教师角色核心能力内涵特征教学方式

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变频驱动液压绞车系统动态特性研究

工矿自动化 2019年第2期45卷 79-84页

作者：丁刚济源职业技术学院机电工程系河南济源459000

利用AMESim构建了闭环控制的变频驱动液压绞车系统的仿真模型,利用模型对液压绞车系统在不同负载突变情况下的动态特性进行了仿真分析。分析结果表明,变频驱动液压绞车系统可以实现对滚筒转速的精确控制,在空载和带载启动过程中,滚筒提... 详细信息

利用AMESim构建了闭环控制的变频驱动液压绞车系统的仿真模型,利用模型对液压绞车系统在不同负载突变情况下的动态特性进行了仿真分析。分析结果表明,变频驱动液压绞车系统可以实现对滚筒转速的精确控制,在空载和带载启动过程中,滚筒提升速度经短时波动后均可达到目标转速,且2种情况下滚筒实际位移与目标位移的最终偏差不超过0.1m;在带载启动下,变频驱动液压绞车系统对于速度的阶跃及正弦变化具有良好的响应及跟踪特性,绞车的滚筒转速对负载的变化不敏感,且其带载速度稳定性较好。

关键词：斜井提升矿井液压绞车变频驱动闭环控制滚筒转速负载突变动态特性

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高校创业教育的文化诉求与构建

高校教育管理 2015年第4期9卷 6-10,23页

作者：丁钢苏州大学教育学院江苏苏州215123 镇江高等专科学校校长办公室江苏镇江212003

高校创业教育不仅仅是指向实践的教育,更是一种全面素质的教育,需要文化素养教育的支撑,需要社会的整体支持和不同教育阶段的有效衔接,需要文化、社会价值观、经济政策、个体行为之间复杂的交互作用。社会要构建崇尚创业、宽容失败的文... 详细信息

高校创业教育不仅仅是指向实践的教育,更是一种全面素质的教育,需要文化素养教育的支撑,需要社会的整体支持和不同教育阶段的有效衔接,需要文化、社会价值观、经济政策、个体行为之间复杂的交互作用。社会要构建崇尚创业、宽容失败的文化氛围。教育系统要系统化地设计和建立创业教育的文化引导体系。高校自身要建设硬环境提供物质条件,建设软环境提供引导体系,建设和运用好硬、软环境的中间结合载体,将创业文化融入学科、专业和课程,建设"专业+创业"的师资队伍和校本创业文化教材,多层面、综合化发挥文化在高校创业教育中的引领和驱动作用。

关键词：创业教育创业文化文化构建大学文化