检索结果-南通市图书馆

International Journal of Minerals,Metallurgy and Materials 2013年第4期20卷 338-344页

作者： Cheng-lin Qi Jian-liang zhang Chao Ma gen-sheng Feng Zhong-ping Song State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Shougang Research Institute of Technology

In order to get the catalytic mechanism of CeO2 on graphite and coal at 400℃, the morphologies of coal, graphite, and CeO2 before and after combustion were analyzed through X-ray photoelectron spectroscopy （XPS）. It is found that the particle size of coal is mostly between 11.727 and 64.79 μm, while the particle size of CeO2 is between 1.937 and 11.79 μm. The agglomeration of coal and CeO2 can be seen by scanning electron microscopy （SEM） after reaction. XPS results show that with the addition of CeO2, the intensity of binding energy gets stronger, but there is no energy peak transition. Comparing the character of coal with and without the addition of CeO2, it can be seen that the C C bond fractures first at 400℃, while the C-H energy-band takes electrons at the same time to be far away from the Fermi level, and the O 2s, O 2p, and C sp hybrid orbitals are all excited. Adding CeO2 can enhance the activity of the whole coal. In addition, through XPS analysis, combined with the oxygen transfer theory and the electron transfer theory, the catalytic mechanism of CeO2 for pulverized coal combustion could be obtained.

关键词： coal combustion cerium oxide valence bands catalysis binding energy X-ray photoelectron spectroscopy pulverized fuel

在线全文

学校读者我要写书评

暂无评论

天然香辛料在肉制品加工中应用进展

中国调味品 2024年第1期49卷 203-208页

作者：张根生徐桂杨苏文文韩冰费英敏哈尔滨商业大学食品工程学院哈尔滨150028 黑龙江民族职业学院哈尔滨150066

天然香辛料是一种在肉制品加工过程中不可或缺的食品添加剂,它可以显著地提高肉制品的感官性能和理化性能,如改善风味、优化颜色、延长储存期等。文章对天然香辛料的分类、功效成分及作用进行了概括,并对其在肉制品中矫味增香、抑菌、... 详细信息

天然香辛料是一种在肉制品加工过程中不可或缺的食品添加剂,它可以显著地提高肉制品的感官性能和理化性能,如改善风味、优化颜色、延长储存期等。文章对天然香辛料的分类、功效成分及作用进行了概括,并对其在肉制品中矫味增香、抑菌、抗氧化、调色及药理方面作用的研究进展及未来发展趋势进行了综述,以期为天然香辛料在肉制品加工中的研究和应用提供理论基础。

关键词：肉制品天然香辛料功效应用进展

Monge–Ampère Type Equations on Almost Hermitian Manifolds

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2023年第5期39卷 749-772页

作者： Jiao gen zhang School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026P.R.China

In this paper we consider the Monge–Ampère type equations on compact almost Hermitian *** derive C∞a priori estimates under the existence of an admissible ***,we obtain an existence result if there exists an admiss... 详细信息

关键词： Monge-Ampere type equations almost Hermitian manifold a priori estimates subsolution

Optimization of the Assembly Efficiency for Lidamycin Chromophore Bound to its Apoprotein:A Case Study using Orthogonal Array

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2011年第6期24卷 602-607页

作者： ZHONG gen Shen GUO Xiao Fang zhang sheng Hua ZHEN Yong Su Department of Oncology Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100050 China Xinxiang Medical University Xinxiang 453003 Henan China

Objective Lidamycin （LDM） can be dissociated to an apoprotein （LDP） and an active enediyne chromophore （AE）. The detached AE can reassemble with its LDP-containing fusion protein to endow the latter with potent antitumor activity. However, the reassembly of AE with LDP is affected by several factors. Our aim was to optimize the assembly efficiency of the AE with a LDP-containing fusion protein and investigate the influence of several factors on the assembly efficacy. Methods A method based on RP-HPLC was developed to analyze the assembly rate, and an orthogonal experimental design L9 （3^4） was used to investigate the effects of temperature, assembly time, pH and molecular ratio of LDP-containing fusion protein to AE on the assembly rate. Furthermore, the determined optimum conditions for the assembly rate of the LDP-containing fusion protein with AE were applied and evaluated. Results A calibration curve based on the LDM micromolar concentration against the peak-area of AE by HPLC was obtained. The order in which individual factors in the orthogonal experiment affected the assembly rate were temperature〉time〉pH〉molar ratio of AE to protein and all were statistically significant （P〈0.01）. The optimal assembly conditions were temperature at 10 ℃, time of 12 h, pH 7.0, and the molar ratio of AE： protein of 5：1. The assembly rate of AE with a LDP-containing fusion protein was improved by 23% after condition optimization. Conclusion The assembly rate of chromophore of lidamycin with its LDP-containing fusion protein was improved after condition optimization by orthogonal design, and the optimal conditions described herein should prove useful for the development of this type of LDP-containing fusion protein.

关键词： Lidamycin Chromophore HPLC Orthogonal array Assembly rate Lidamycin Chromophore HPLC Orthogonal array Assembly rate

The synthesis of micro-sized silicon carbide whiskers and the application for heat transfer enhancement

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2014年第12期57卷 2371-2378页

作者： zhang Pei gen LIANG Jian Dong YIN Li Ying GUO sheng Min Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and Engineering Southeast University Mechanical Engineering Louisiana State University

This paper presents a simple and cost-effective method for the production of micro-sized silicon carbide whiskers at high yield and the effect on heat transfer enhancement for the whisker laden fluids. For SiC whisker synthesis, the starting powder mix- ture is obtained by milling short carbon fibers with the white ashes of rice hulls. Calcina：ion in argon, together with the subse- quent purification process, results in a high yield of SiC whiskers, which possess a diameter of 200-400 nm and a length of several tens of microns. The formation of the whiskers is discussed according to VS growth mechanism. Convective heat transfer performance in small channel tubes is then studied for fluid systems mixed with those micro-sized SiC whiskers at different concentrations. The heat transfer coefficient of SiC containing fluid can be significantly improved in comparison to the base fluid.

关键词： SiC whiskers Vapor-Solid whisker suspension heat transfer

Exploring Variational Auto-encoder Architectures, Configurations, and Datasets for generative Music Explainable AI

在线全文

学校读者我要写书评

暂无评论

Machine Intelligence Research 2024年第1期21卷 29-45页

作者： Nick Bryan-Kinns Bingyuan zhang Songyan Zhao Berker Banar School of Electronic Engineering and Computer Science Queen Mary University of LondonLondon E14NSUK Computer Science Department Carleton CollegeNorthfield MN 55057USA

generative AI models for music and the arts in general are increasingly complex and hard to *** field of ex-plainable AI(XAI)seeks to make complex and opaque AI models such as neural networks more understandable to *** ap-proach to making generative AI models more understandable is to impose a small number of semantically meaningful attributes on gen-erative AI *** paper contributes a systematic examination of the impact that different combinations of variational auto-en-coder models(measureVAE and adversarialVAE),configurations of latent space in the AI model(from 4 to 256 latent dimensions),and training datasets(Irish folk,Turkish folk,classical,and pop)have on music generation performance when 2 or 4 meaningful musical at-tributes are imposed on the generative *** date,there have been no systematic comparisons of such models at this level of com-binatorial *** findings show that measureVAE has better reconstruction performance than adversarialVAE which has better musical attribute *** demonstrate that measureVAE was able to generate music across music genres with inter-pretable musical dimensions of control,and performs best with low complexity music such as pop and *** recommend that a 32 or 64 latent dimensional space is optimal for 4 regularised dimensions when using measureVAE to generate music across *** res-ults are the first detailed comparisons of configurations of state-of-the-art generative AI models for music and can be used to help select and configure AI models,musical features,and datasets for more understandable generation of music.

关键词： Variational auto-encoder explainable AI(XAI) generative music musical features datasets

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

肿瘤放射治疗的发展

原子能科学技术 2024年第S2期58卷 492-500页

作者：杨根赵梓茗张艺宝颜学庆北京大学核物理与核技术国家重点实验物理学院北京100871 香港大学深圳医院临床肿瘤医学中心广东深圳518053 北京大学肿瘤医院暨北京市肿瘤防治研究所放射治疗科恶性肿瘤发病机制及转化研究教育部重点实验室北京100142

恶性肿瘤是目前人类死亡的主要原因之一,以美国为代表的发达国家中,超过半数的肿瘤患者在治疗过程中需要单独或联合使用放射治疗。过去的半个世纪以来,放射治疗围绕着“增效减毒”的原则展开技术迭代,不断和手术、化疗以及新兴的免疫疗... 详细信息

恶性肿瘤是目前人类死亡的主要原因之一,以美国为代表的发达国家中,超过半数的肿瘤患者在治疗过程中需要单独或联合使用放射治疗。过去的半个世纪以来,放射治疗围绕着“增效减毒”的原则展开技术迭代,不断和手术、化疗以及新兴的免疫疗法等其他手段相结合,极大地提高了治疗疗效和可及性。21世纪以来,通过采用更先进的剂量递送方式、结合实时影像的自适应规划、引入人工智能和新的粒子辐射类型等先进技术,放射治疗的安全性和有效性都得到了提高。本文回顾了近几十年来放射治疗领域的技术进步,展示了在加速器平台上进行高剂量率放射治疗研究的典型案例,总结了放射治疗相关的新兴研究热点,并对该领域的发展方向做出了展望。

关键词：肿瘤放射治疗超高剂量率放射治疗调强放射治疗

在线全文

学校读者我要写书评

暂无评论

林业技术专业课程思政的探索与实践

教育教学论坛 2024年第16期 125-129页

作者：蒋莲艳蒋冬生张根涛广西生态工程职业技术学院林业工程学院广西柳州545000

“一带一路”建设的实施,对院校林业技术专业职业教育改革具有积极的推动作用。在院校林业技术专业开展国际交流合作的背景下,以增强中华文明传播力影响力为宗旨,阐述了林业技术专业课程思政的必要性及需要解决的关键问题,并提出构建文... 详细信息

“一带一路”建设的实施,对院校林业技术专业职业教育改革具有积极的推动作用。在院校林业技术专业开展国际交流合作的背景下,以增强中华文明传播力影响力为宗旨,阐述了林业技术专业课程思政的必要性及需要解决的关键问题,并提出构建文化自信的林业技术专业课程思政,以弘扬中华优秀传统文化和挖掘林业文化内涵为实现手段,进行了一定的积极探索与实践,以期为培养专业学生的可持续发展观、生态文明观、绿色文化价值观等提供初步的解决方案。

关键词：林业技术专业中华优秀传统文化林业文化课程思政

基于6D位姿识别面向任意物体的智能人-机协同递送

在线全文

学校读者我要写书评

暂无评论

工程科学学报 2024年第1期46卷 148-156页

作者：张树忠朱祺张弓陈旭飞杨根吴月玉齐春雨邸思福建理工大学福建省智能加工技术及装备重点实验室福州350108 广州先进技术研究所广州511458 中国科学院大学北京100049

在日常实践中存在大量人与人之间的多样性物体递送需求,这可以依靠协作机器人来完成这些简单、耗时又耗力的任务.为此,针对人-机协同递送过程中无法精确识别物体位姿导致难以准确抓取的问题,引入基于Pn P算法(Perspective-nPoint)的物... 详细信息

在日常实践中存在大量人与人之间的多样性物体递送需求,这可以依靠协作机器人来完成这些简单、耗时又耗力的任务.为此,针对人-机协同递送过程中无法精确识别物体位姿导致难以准确抓取的问题,引入基于Pn P算法(Perspective-nPoint)的物体6D位姿识别网络,实现待递送物体位姿的精确识别;提出改进的被递送物体数据集制作方法,实现面向任意物体的精准识别;通过视觉系统标定、坐标转换以及抓取方案改进,实现物体的精确位姿定位与准确抓取;为验证所提出的人-机协同递送系统的有效性,进行了基于LineMod数据集和自制数据集的人-机物体递送对比实验.结果表明,面向自制数据集的物体递送提出的人-机递送系统平均误差距离为1.97 cm,递送平均成功率为76%,平均递送时间为30 s;如不考虑抓取姿势,其递送成功率可达89%;具有较好的鲁棒性,应用前景良好.

关键词：人-机协同物体递送 PnP算法残差网络数据集