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鲜茶叶、苹果及马铃薯多酚氧化酶活性的比较

现代食品科技 2009年第11期25卷 1258-1261页

作者：宋金隆赵树欣张黎明郭淑文崔景宜天津科技大学生物工程学院工业微生物教育部重点实验室天津300457

采用分光光度法研究了鲜茶叶、苹果及马铃薯3种不同来源的多酚氧化酶(PPO)的酶活特性,结果表明:苹果、鲜茶叶及马铃薯的最适pH分别为5、6、7,最适温度为25℃、30℃、30℃,最适PVPP加入量为0.75g、1.05g、0.45g,最佳底物浓度为0.12mol/L... 详细信息

采用分光光度法研究了鲜茶叶、苹果及马铃薯3种不同来源的多酚氧化酶(PPO)的酶活特性,结果表明:苹果、鲜茶叶及马铃薯的最适pH分别为5、6、7,最适温度为25℃、30℃、30℃,最适PVPP加入量为0.75g、1.05g、0.45g,最佳底物浓度为0.12mol/L、0.12mol/L、0.12mol/L,热稳定性试验表明鲜茶叶的PPO热稳定性最好,其次为苹果的PPO,马铃薯的PPO热稳定性最差。不同酶源物活性的强度为:马铃薯>苹果>鲜茶叶,3种PPO对pH、温度、PVPP有各自的特性,热稳定性也不相同,而最佳底物浓度却存在共性。

关键词：多酚氧化酶活性 PVPP

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IP全光传送网络的网络结构设计

深圳大学学报（理工版） 2001年第2期18卷 28-33页

作者：蔡茂国杨淑雯深圳大学信息工程学院深圳518060

讨论了IPoverOptical全光网络的关键技术 ,给出了IPoverOptical (DWDM和OCDMA)光交叉连接器和光分插复用器的实现方法 ,设计了IP全光传送网络的网络结构 .

关键词：全光网络互联网光交叉连接光分插复用网络结构设计

Organic matter and concentrated nitrogen removal by shortcut nitrification and denitrification from mature municipal landfill leachate

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Journal of Environmental Sciences 2007年第6期19卷 647-651页

作者： ZHANG shu-jun PENG Yong-zhen WANG shu-ying ZHENG shu-wen guo Jin College of Environmental and Energy Engineering Beijing University of Technology Beijing 100022 China

An UASB＋Anoxic/Oxic （A/O） system was introduced to treat a mature landfill leachate with low carbon-to-nitrogen ratio and high ammonia concentration. To make the best use of the biodegradable COD in the leaehate, the denitrifieation of NOx^--N in the reeireulation effluent from the elarifier was carried out in the UASB. The results showed that most biodegradable organic matters were removed by the denitrifieation in the UASB. The NH4^＋-N loading rate （ALR） of A/O reactor and operational temperature was 0.28- 0.60 kg NH4^＋-N/（m^3-d） and 17-29℃ during experimental period, respectively. The short-cut nitrification with nitrite accumulation efficiency of 90%-99% was stabilized during the whole experiment. The NH4^＋-N removal efficiency varied between 90% and 100%. When ALR was less than 0.45 kg NH4^＋-N/（m^3.d）, the NH4^＋-N removal efficiency was more than 98%. With the influent NH4^＋-N of 1200-1800 mg/L, the effluent NH4^＋-N was less than 15 mg/L. The shortcut nitrification and denitrifieation can save 40% carbon source, with a highly efficient denitrifieation taking place in the UASB. When the ratio of the feed COD to feed NH4^＋-N was only 2-3, the total inorganic nitrogen （TIN） removal efficiency attained 67%-80%. Besides, the sludge samples from A/O reactor were analyzed using FISH. The FISH analysis revealed that ammonia oxidation bacteria （AOB） accounted for 4% of the total eubaeterial population, whereas nitrite oxidation bacteria （NOB） accounted only for 0.2% of the total eubaeterial population.

关键词： mature landfill leachate UASB+A/O shortcut nitrification carbon source

巴彦淖尔地区不同年龄居民饮食习惯及肥胖比较分析

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科技视界 2015年第23期 46-47页

作者：李云玲郭淑文李亚珍夏美茹河套学院农学系内蒙古巴彦淖尔015000

采用按比例概率抽样方法 ,随机调查了巴彦淖尔地区30~82岁1470例常住居民的饮食习惯与肥胖的情况,并比较分析饮食习惯与肥胖的关系,为巴彦淖尔地区居民的肥胖管理和控制工作提供参考依据。

关键词：巴彦淖尔地区不同年龄饮食习惯肥胖

Observation of Bi Coarsening and Dissolution Behaviors in Melting Al–Bi Immiscible Alloy

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Acta Metallurgica Sinica(English Letters) 2016年第9期29卷 800-803页

作者： wen-Quan Lu shu-Guang Zhang Jian-guo Li School of Materials Science and Engineering Shanghai Jiao Tong University School of Environmental Science and Engineering Shanghai Jiao Tong University

Using synchrotron radiography, a melting process of the AI-10 wt% Bi immiscible alloy was fully observed, and Bi solute coarsening and dissolution behaviors as well as their effect on the microstructural evolution were also investi- gated. We found that two different steps including coarsening and dissolution processes can be used to describe the structure evolution in melting AI-10 wt% Bi immiscible alloy. And diffusion coalescence controlled the coalescence of Bi droplets at the early stage of the melting AI-10 wt% Bi immiscible alloy, while the coagulation dttring movement did at later stage. Also, the larger the droplet, the larger the distance of the steady-state concentration distribution around the droplet.

关键词： Immiscible alloy Coarsening Dissolution Synchrotron radiography

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DSP芯片原理与设计

深圳大学学报（理工版） 2001年第1期18卷 25-32页

作者：刘文东蔡茂国杨淑雯深圳大学新技术研究中心深圳518060

介绍了DSP芯片的原理、特点与分类 ,阐述了DSP开发方案的设计与选择 .以TI公司的TMS32 0F2 0 6为例 ,介绍了DSP芯片开发中的基本概念与一般流程。

关键词： DSP芯片原理特点方案设计 TMS320F206 数字信号处理

Analysis of kinematic data and determination of ground reaction force of foot in slow squat

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Acta Mechanica Sinica 2013年第1期29卷 143-148页

作者： Xu-shu Zhang Yuan guo Mei-wen An Wei-Yi Chen Institute of Applied Mechanics and Biomedical Engineering Taiyuan University of Technology

In the present paper, the ground reaction force （GRF） acting on foot in slow squat was determined through a force measuring system, and at the same time, the kinematic data of human squat were obtained by analyzing the photographed image sequences. According to the height and body weight, six healthy volunteers were selected, three men in one group and the other three women in another group, and the fundamental parameters of subjects were recorded, including body weight, height and age, etc. Based on the anatomy characteristics, some markers were placed on the right side of joints. While the subject squatted at slow speed on the force platform, the ground reaction forces on the forefoot and heel for each foot were obtained through calibrated force platform. The analysis results show that the reaction force on heel is greater than that on forefoot, and double feet have nearly constant force. Moreover, from processing and analyzing the synchronously photographed image sequences in squat, the kinematic data of human squat were acquired, including mainly the curves of angle, angular velocity and angular acceleration varied with time for knee, hip and ankle joints in a sagittal plane. The obtained results can offer instructive reference for photographing and analyzing the movements of human bodies, diagnosing some diseases, and establishing in the future appropriate mathematical models for the human motion.

关键词： Ground reaction force. Force sensor. Kinematic data. Foot. Squat

电子喉镜窄带成像技术对喉癌及癌前病变的成像效果分析

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中外医疗 2019年第16期38卷 196-198页

作者：赵声波高正文郭文淑王丹曾文翠徐松李章婧云南省昭通市第一人民医院耳鼻咽喉科

目的探讨对喉癌与癌前病变患者选择电子喉镜窄带成像技术进行干预后获得的成像效果。方法方便选择该院2017年11月—2018年11月收治的56例疑似喉癌与癌前病变患者作为实验对象;临床分别实施常规电子喉镜检查以及电子喉镜窄带成像技术检查... 详细信息

目的探讨对喉癌与癌前病变患者选择电子喉镜窄带成像技术进行干预后获得的成像效果。方法方便选择该院2017年11月—2018年11月收治的56例疑似喉癌与癌前病变患者作为实验对象;临床分别实施常规电子喉镜检查以及电子喉镜窄带成像技术检查;记录图片资料并行病理活检,以病理诊断为金标准评估两种模式下诊断的符合率;对比成像效果。结果对该次研究收治的56例疑似喉癌与癌前病变患者完成病理诊断后,最终发现84处解剖分区受到累及,其中35处属于浅表型,49处属于溃疡型或者隆起型。对患者完成常规电子喉镜诊断后发现,34处血管形态图像最终表现清晰,40处病变范围图像最终表现清晰;对患者完成电子喉镜窄带成像技术诊断后发现,44处血管形态图像最终表现清晰,50处病变范围图像最终表现清晰;在血管形态图像清晰方面,组间差异有统计学意义(χ^2=4.2232,P<0.05);在病变范围图像清晰方面,组间差异有统计学意义(χ^2=5.6566,P<0.05)。结论喉癌与癌前病变患者在接受诊断期间,电子喉镜窄带成像技术的有效应用,对于血管形态以及病变范围均可以做到清晰显示,从而对于喉癌疾病的早期确诊奠定基础,进而于早期完成喉癌治疗方案的研究,促进其康复加快。

关键词：电子喉镜窄带成像技术喉癌癌前病变成像效果

Bandgap characteristics analysis and graded design of a novel metamaterial for flexural wave suppression

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 1-24页

作者： Fan YANG Zhaoyang MA Xingming guo Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai University Shanghai Institute of Aircraft Mechanics and Control

A novel elastic metamaterial is proposed with the aim of achieving lowfrequency broad bandgaps and bandgap regulation. The band structure of the proposed metamaterial is calculated based on the Floquet-Bloch theorem, and the boundary modes of each bandgap are analyzed to understand the effects of each component of the unit cell on the bandgap formation. It is found that the metamaterials with a low elastic modulus of ligaments can generate flexural wave bandgaps below 300 Hz. Multi-frequency vibrations can be suppressed through the selective manipulation of bandgaps. The dual-graded design of metamaterials that can significantly improve the bandgap width is proposed based on parametric studies. A new way that can regulate the bandgap is revealed by studying the graded elastic modulus in the substrate. The results demonstrate that the nonlinear gradient of the elastic modulus in the substrate offers better bandgap performance. Based on these analyses, the proposed elastic metamaterials can pave the way for multi-frequency vibration control, low-frequency bandgap broadening, and bandgap tuning.

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