检索结果-南通市图书馆

Food synthetic biology-driven protein supply transition: From animal-derived production to microbial fermentation

Chinese Journal of Chemical Engineering 2021年第2期34卷 29-36页

作者： Yanfeng liu Xiaomin Dong Bin Wang Rongzhen Tian Jianghua Li long liu Guocheng Du Jian Chen Science Center for Future Foods Jiangnan UniversityWuxi 214122China Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of EducationJiangnan UniversityWuxi 214122China Key Laboratory of Industrial Biotechnology Ministry of EducationJiangnan UniversityWuxi 214122China National Engineering Laboratory for Cereal Fermentation Technology Jiangnan UniversityWuxi 214122China

Animal-derived protein production is one of the major traditional protein supply methods,which continues to face increasing challenges to satisfy global needs due to population growth,augmented individual protein consumption,and aggravated environmental ***,ensuring a sustainable protein source is a considerable *** emergence and development of food synthetic biology has enabled the establishment of cell factories that effectively synthesize proteins,which is an important way to solve the protein supply *** review aims to discuss the existing problems of traditional protein supply and to elucidate the feasibility of synthetic biology in the process of protein ***,using artificial bioengineered milk and artificial bioengineered eggs as examples,the progress of food protein supply transition based on synthetic biology has been systematically ***,the future of food synthetic biology as a potential source of protein has been also *** strengthening and innovating the application of food synthetic biology technologies,including genetic engineering and high-throughput screening methods,the current limitations of artificial foods for protein synthesis and production should be ***,the development and industrial production of new food resources should be explored to ensure safe,high-quality,and sustainable global protein supply.

关键词： Artificial food Biotechnology Food processing Food synthetic biology Protein source Protein supply

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interface Design Strategy for GNS/AZ91 Composites with Semi-Coherent Structure

引用

Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 467-483页

作者： Jing-Peng Xiong Yi-Qi Zeng Jin-long liu Wei-Cheng Wang Lan Luo Yong liu Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province School of Advanced ManufacturingNanchang UniversityNanchang 330031China School of Physics and Materials Science Nanchang UniversityNanchang 330031China

The interfacial structure plays an important role in the mechanical properties of magnesium matrix composite(MMCs)reinforced with graphene nanosheet(GNS)due to their poor wettability with the Mg *** interface design strategy was proposed to form the semi-coherent interfacial structure with superior bonding *** lattice mismatch and interfacial bonding strength between Mg/rare earth oxide/carbon were utilized as key characteristics to evaluate the interfacial *** oxide(La2O3)was selected as the intermediate candidate due to its low lattice mismatch and high interfacial bonding *** identify the interfacial structure of Mg/La2O3/graphene,first-principles calculations were conducted to calculate the ideal work of separation and electronic structure of the *** demonstrated the presence of strong ionic and covalent interactions at the interface,which theoretically verified the strong interfacial bonding strength among Mg/La2O3/graphene *** experimentally validate the interface strength,MMCs with the interface structure of Mg/La2O3/GNS were *** formation of in-situ La2O3 led to the successful attainment of semi-coherent structures between Mg/La2O3 and La2O3/GNS,resulting in high strength and good ductility of the ***,this work proposes a new approach to interface design in MMCs with an enhancement of mechanical properties.

关键词： Interface design strategy Magnesium matrix composite Graphene nanosheets Semi-coherent interface Mechanical properties

来源：

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

Orientation Measurement for Objects with Planar Surface Based on Monocular Microscopic Vision

引用

International Journal of Automation and computing 2020年第2期17卷 247-256页

作者： Ying Li Xi-long liu De Xu Da-Peng Zhang Research Center of Precision Sensing and Control Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Computer and Control Engineering University of Chinses Academy of SciencesBeijing 101408China

Orientation measurement of objects is vital in micro *** this paper,we present a novel method based on monocular microscopic vision for 3-D orientation measurement of objects with planar *** proposed methods aim to measure the orientation of the object,which does not require calibrating the intrinsic parameters of microscopic *** our methods,the orientation of the object is firstly measured with analytical computation based on feature *** results of the analytical computation are coarse because the information about feature points is not fully *** order to improve the precision,the orientation measurement is converted into an optimization process base on the relationship between deviations in image space and in Cartesian space under microscopic *** results of the analytical computation are used as the initial values of the optimization *** optimized variables are the three rotational angles of the object and the pixel equivalent *** objective of the optimization process is to minimize the coordinates differences of the feature points on the *** precision of the orientation measurement is boosted *** and comparative results validate the effectiveness of the proposed methods.

关键词： Microscopic vision micro assembly orientation measurement optimization analytical computation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Theoretical study on bubble dynamics under hybrid-boundary and multi-bubble conditions using the unified equation

引用

Science China(Physics,Mechanics & Astronomy) 2023年第12期66卷 142-157页

作者： A-Man Zhang Shi-Min Li Pu Cui Shuai Li Yun-long liu College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China Nanhai Institute of Harbin Engineering University Sanya 572024China

This paper aims to use the unified bubble dynamics equation to investigate bubble behavior in complex scenarios involving hybrid free surface/wall boundaries and interactions between multiple *** effect of singularity movement on the unified equation’s form is analyzed after deriving the bubble pulsation equation using a moving point source and a dipole,followed by discussions on the effect of migration compressibility-related terms on the bubble *** addition,the present study accounts for the impact of hybrid boundaries,including crossed and parallel boundaries,by introducing a finite number of mirror bubbles for the former and an infinite number of mirror bubbles for the *** bubble experiments and numerical simulation are conducted to validate the present *** application of the unified equation in multi-bubble interactions is exemplified by computing a spherical bubble array containing more than 100 uniformly distributed cavitation bubbles under different boundary *** bubble cluster-induced pressure peak can reach nearly two times or even higher than that of an individual bubble,highlighting the damage potential caused by cavitation bubble clusters.

关键词： bubble dynamics multiphase flows cavitation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Detection of Malicious PDF Files Using a Two-Stage Machine Learning Algorithm

引用

Chinese Journal of Electronics 2020年第6期29卷 1165-1177页

作者： HE Kang ZHU Yuefei HE Yubo liu long LU Bin LIN Wei State Key Laboratory of Mathematical Engineering and Advanced Computing

Portable document format(PDF) files are increasingly used to launch cyberattacks due to their popularity and increasing number of *** solutions have been developed to detect malicious files,but their accuracy decreases rapidly in face of new evasion *** explore how to improve the robustness of classifiers for detecting adversarial attacks in PDF *** replacement and the n-gram are implemented to extract robust features using proposed guiding *** the two-stage machine learning model,the objects are divided based on their types,and the anomaly detection model is first trained for each type *** former detection results are organized into tree-like information structure and treated as inputs to convolutional neural *** results show that the accuracy of our classifier is nearly 100% and the robustness against evasive samples is *** object features also enable the identification of different vulnerabilities exploited in malicious PDF files.

关键词： convolutional neural nets document handling feature extraction learning (artificial intelligence) pattern classification security of data trees (mathematics) robust feature extraction convolutional neural network tree-like information structure adversarial attack detection two-stage machine learning algorithm evasion techniques malicious files portable document format malicious PDF files classifier robustness anomaly detection model two-stage machine learning model Malicious PDF classification Robustness Guiding principles Two-stage classifier Convolutional neural network

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Fixation of CO_2 by electrocatalytic reduction to synthesis of dimethyl carbonate in ionic liquid using effective silver-coated nanoporous copper composites

引用

Chinese Chemical Letters 2010年第8期21卷 987-990页

作者： Xuan Yun Wang Su Qin liu Ke long Huang Qiu Ju Feng De Lai Ye Bing liu Jin long liu Guan Hua Jin College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

With high surface area,open porosity and high efficiency,a catalyst was prepared and firstly employed in electrocatalytic reduction of CO2 and electrosynthesis of dimethyl carbonate（DMC）.The electrochemical property for electrocatalytic reduction of CO2 in ionic liquid was studied by cyclic voltammogram（CV）.The effects of various reaction variables like temperature,working potential and cathode materials on the electrocatalytic performance were also investigated.80%yield of DMC was obtained under the optimal reaction conditions.

关键词： Electrocatalytic Carbon dioxide Nanoporous Dimethyl carbonate Ionic liquid

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Segmented taper equations with crown ratio and stand density for Dahurian Larch (Larix gmelinii) in Northeastern China

引用

Journal of Forestry Research 2011年第3期22卷 347-352页

作者： JIANG Li-chun liu Rui-long College of Forestry Northeast Forestry University 26 Hexing roadHarbin 150040 Heilongjiang Province P.R. China.

Segmented taper equation was selected to model stem profile of Dahurian larch （Larix gmelinii Rupr.）. The data were based on stem analysis of 74 trees from Dailing Forest Bureau in Heilongjiang Province, Northeastern China. Two taper equations with crown ratio and stand basal area were derived from the Max and Burkhart’s （1976） taper equation. Three taper equations were evaluated：（1） the original equation, （2） the original equation with crown ratio, and （3） the original equation with basal area. SAS NLIN and SYSNLIN procedures were used to fit taper equations. Fit statistics and cross-validation were used to evaluate the accuracy and precision of these models. Parameter estimates showed that the original equation with inclusion of crown ratio and basal area variables provided significantly different parameter estimates with lower standard errors. Overall fit statistics indicated that the root mean square error （RMSE） for diameter outside and inside bark decreased respectively by 10% and 7% in the original model with crown ratio and by 12% and 7.2% in the original model with basal area. Cross-validation further confirmed that the original equation with inclusion of crown ratio and basal area variables provided more accurate predictions at the lower section （relative heights, 10%） and upper section （relative heights, 50%） for both outside and inside bark diameters.

关键词： basal area crown ratio Larix gmelinii nonlinear regression taper equations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

云多租数据库资源规划调度技术综述

引用

软件学报 2025年第1期36卷 446-468页

作者：刘海龙王硕侯舒峰徐海洋李战怀西北工业大学计算机学院大数据存储与管理工业和信息化部重点实验室(西北工业大学)

云多租数据库具有按需付费、按需扩展、免部署、高可用、自带运维能力、资源共享等诸多优势,可以大大降低用户使用数据库服务的成本.现在越来越多的企业和个人开始在数据库即服务(DaaS)平台托管他们的数据库服务. DaaS平台需要按照用户... 详细信息

云多租数据库具有按需付费、按需扩展、免部署、高可用、自带运维能力、资源共享等诸多优势,可以大大降低用户使用数据库服务的成本.现在越来越多的企业和个人开始在数据库即服务(DaaS)平台托管他们的数据库服务. DaaS平台需要按照用户服务水平协议(SLA)为诸多租户提供服务,同时也需要保障平台收益.但是,由于租户及其负载具有动态性、异构性和竞争性等特点,如何在遵循SLA的同时根据负载自适应规划调度资源同时兼顾平台收益对于DaaS平台来说是一件极具挑战性的工作.针对云多租数据库中比较常见的类型,如关系型数据库,详细分析了当前云多租数据库资源规划调度技术所面临的挑战,提炼了关键科学问题,给出了技术框架,然后从资源规划调度技术、资源预估技术、资源弹性伸缩技术以及数据库资源规划调度工具等4个方面对现有研究工作进行了总结和分析,并且展望了未来的研究方向.

关键词：多租户云数据库资源规划调度资源预估资源弹性伸缩关系数据库云原生多模数据库

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A polarized micro-Raman study of a 0.65PbMg_(1/3)Nb_(2/3)O_3-0.35PbTiO_3 single crystal

引用

Chinese Physics B 2012年第1期21卷 482-487页

作者： Zhang Li-Yan Zhu Ke liu Yu-long Institute of Physics Chinese Academy of SciencesBeijing 100190China

Polarized micro-Raman spectra of a 0.65PbMgl/3Nb2/303 0.35PbTiO3 （0.65PMN-0.35PT） single crystal poled in the [001] direction are obtained in a wide frequency range （50 2000 cm^-1） at different temperatures. The best fit to the Raman spectrum at 77 K is achieved using 17 Lorenzians to convolute into it, and this is proved to be a reasonable fit. According to the group theory and selection rules of overtone and combinational modes, apart from the seven Raman modes that are from first-order Raman scattering, the remaining ones are attributed to being from second-order Raman scattering. A comparison between the experimental results and theoretical predictions shows that they are in satisfactory agreement with each other. Our results indicate that at 77 K the sample belongs to the rhombohedral symmetry with the C^53v（R3m） space group （Z = 1）. In our study, on heating, the 0.65PMN 0.35PT single crystal undergoes a rhombohedral → tetragonal → cubic phase transition sequence. The two phase transitions occur at 340 and 440 K, which correspond to the disappearance of the soft mode near 106 cm-1 recorded in VV polarization and the vanishing of the band around 780 cm^-1 in VH polarization, respectively.

关键词： 0.65PMN-0.35PT, polarized micro-Raman second-order Raman scattering, phase tran-sition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Prolonged simulation of near-free surface underwater explosion based on Eulerian finite element method

引用

Theoretical & Applied Mechanics Letters 2020年第1期10卷 16-22页

作者： Ming He A-Man Zhang Yun-long liu College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

n the area of naval architecture and ocean engineering,the research about the underwater xplosion problem is of great *** achieve prolonged simulation of near-free surface underwater explosion,the underwater explosion transient numerical model is established in this paper based on compressible Eulerian finite element method(EFEM).Compared with Geers Hunter formula,EFEM is availably validated by simulating the free-field underwater xplosion ***,the bubble pulsation and flow field dynamic characteristics of the cases with different underwater explosive depth are compared in this ***,the height of the water hump and the pressure of flow flied are analyzed quantitatively through the simulation results.

关键词： Bubble dynamics Underwater explosion Free surface Eulerian finite element method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：