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唾液链球菌嗜热亚种与动物双歧杆菌乳亚种复合发酵对发酵乳品质的改善作用

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食品科学 2025年第2期46卷 89-98页

作者：刘志忠刘立伟刘志刚陈海丽崔红杨波张佳琪乌日更姚凯乌兰察布市草原酸奶菌种研发与产业化应用研究院内蒙古乌兰察布012000 察右后旗市场监督管理局内蒙古乌兰察布012406 内蒙古兰格格乳业有限公司内蒙古乌兰察布012000 内蒙古察右后旗第三中学内蒙古乌兰察布012406 内蒙古农业大学乳品生物技术与工程教育部重点实验室内蒙古呼和浩特010000

为评估唾液链球菌嗜热亚种CZ-03(Streptococcus salivarius *** CZ-03)与动物双歧杆菌乳亚种LGG-08(Bifidobacterium animalis *** LGG-08)复合发酵对发酵乳品质的影响,采用这两种菌株对牛乳进行复合发酵,分析其流变学特性、质构特性以... 详细信息

为评估唾液链球菌嗜热亚种CZ-03(Streptococcus salivarius *** CZ-03)与动物双歧杆菌乳亚种LGG-08(Bifidobacterium animalis *** LGG-08)复合发酵对发酵乳品质的影响,采用这两种菌株对牛乳进行复合发酵,分析其流变学特性、质构特性以及活菌数。利用多频扩散波谱法详细研究复合发酵乳的微观结构及其动态变化,评估其稠度、硬度、内聚性和黏度指数。结果显示,在贮藏初期(0~14 d),复合发酵乳的胞外多糖质量浓度从204.7 mg/L增加至233 mg/L,显著高于单菌株发酵乳。此外,复合发酵乳在整个贮藏期间的活菌数显著高于单菌组,显著提升了产品的贮藏稳定性和益生功能。复合菌株的使用显著改善了发酵乳的流变学和质构特性,尤其在黏度和持水性方面。与单一菌株发酵的样品相比,复合发酵乳能更有效地形成稳定的凝胶结构。这些发现为益生菌发酵乳的产品开发和健康功能提升提供了坚实的科学依据,并为发酵乳的生产及贮藏特性评估提供了创新视角和策略。

关键词：唾液链球菌嗜热亚种动物双歧杆菌乳亚种益生菌发酵乳品质改善

Function, energy and environment orientation in innovation research of rare earth materials

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Science China(Technological Sciences) 2019年第12期62卷 2302-2305页

作者： ZHOU XueZhen LI HongYang liu yanzhu LI YongXiu Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University

Rare earths(REs),as a kind of key elements widely used in high-tech industry,have been paid more and more attention all over the *** a time when the world trade war is raging,dignitaries and executives are trying to control this strategic resource,while scientific and technological re-searchers are trying to solve the scientific and technological problems in the development of RE *** innovation research of RE materials are orientated by three main aspects as shown in Figure 1:one is to make the production process of RE materials more green and sustainable,the second is to strengthen the material properties and save energy,and the third is to find new functional materials with improved quality..

关键词： Figure energy technological

Implementation and application of FRET-FLIM technology

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Journal of Innovative Optical Health Sciences 2019年第5期12卷 57-68页

作者： Shiqi Wang Binglin Shen sheng Ren Yihua Zhao Silu Zhang Junle Qu liwei liu Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060P.R.China

With the development of the new detection methods and the function of fluorescent molecule,researchers hope to further explore the internal mechanisms of organisms,monitor changes in the intracellular microenvironment,and dynamic processes of molecular interactions in ***-rescence resonance energy transfer(FRET)describes the energy transfer process between donor fluorescent molecules and acceptor fluorescent *** is an important means to detect protein-protein interactions and protein conformation changes in *** lifetime imaging microscopy(FLIM)enables noninvasive measurement of the fAuorescence lifetime of fluorescent particles in *** FRET-FLIM technology,which is use FLIM to quantify and analyze FRET,enables real-time monitoring of dynamic changes of proteins in biological cells and analysis of protein interaction *** distance between donor and acceptor and their respective fAuorescent lifetime,which are of great importance for studying the mechanism of intracellular activity can be obtained by data analysis and algorithm ftting.

关键词： Fluorescence resonance energy transfer fuorescenc-lifetime imaging microscopy protein-protein interaction

The Probability Analysis for the Many-Versus-One Guerrilla War

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Journal of Systems Science & Complexity 2015年第3期28卷 645-660页

作者： liu liwei LI Jianjun QIAN Linfang School of Science Nanjing University of Science and Technology School of Mechanical Engineering Nanjing University of Science and Technology

This paper discusses a stochastic duel model between two forces. On one side is the guerrilla(or terrorists) which has only one weapon(or person), and on the other an organized force of some sort which has many weapons. The model is called the many-versus-one guerrilla war. The guerrilla side has a number of advantages such as choice of location and time of engagement, concealment by topography, observation of the intended target, and line of fire. The authors present these advantages in what they believe are a realistic scenario of a duel between the guerrilla force and the organized force. By the four suppositions coinciding with the practical duel background, the paper presents the formulas to calculate the satisfying probability, the weak satisfying probability, and the acceptable probability of the attack side.

关键词： Fokker-Planck equation guerrilla war Markov chains military operational research stochastic duel.

Game-Oriented Security Strategy Against Hotspot Attacks for Internet of Vehicles

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Computers, Materials & Continua 2021年第8期68卷 2145-2157页

作者： Juan Guo yanzhu liu Shan Li Zhi Li Sonia Kherbachi Guilin University of Electronic Technology Beihai536000GuangxiChina Great Wall Computer Software and Systems Inc. Beijing100083China Department of Electronics and Communication Engineering Beijing Electronic Science and Technology InstituteBeijing100070China State Grid Information&Telecommunication Group Co. Ltd.Beijing100031China Department of Management University of BejaiaBejaia06000Algeria

With the rapid development of mobile communication technology,the application of internet of vehicles(IoV)services,such as for information services,driving safety,and traffic efficiency,is growing *** businesses with low transmission delay,high data processing capacity and large storage capacity,by deploying edge computing in the IoV,data processing,encryption and decision-making can be completed at the local end,thus providing real-time and highly reliable communication *** roadside unit(RSU),as an important part of edge computing in the IoV,fulfils an important data forwarding function and provides an interactive communication channel for vehicles and server *** computing resources can be configured to accommodate the computing requirements of *** this study,a virtual traffic defense strategy based on a differential game is proposed to solve the security problem of user-sensitive information leakage when an RSU is *** incentive mechanism encourages service vehicles within the hot range to send virtual traffic to another *** attracting the attention of attackers,it covers the target RSU and protects the system from *** results show that the scheme provides the optimal strategy for intelligent vehicles to transmit virtual data,and ensures the maximization of users’interests.

关键词： Edge computing internet of vehicles differential games security defense

A Key Management Scheme Based on Hypergraph for Fog Computing

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China Communications 2018年第11期15卷 158-170页

作者： Zhi Li yanzhu liu Di liu Chunyang Li Wei Cui Guanglin Hu State Grid Information & Telecommunication Group Co. Ltd. Beijing 102211 China Great Wall Computer Software and Systems Inc. Beijing 100190 China

Fog computing is a new paradigm supporting the stringent requirements of mobility applications by bridging cloud computing and smart devices. Since the smart devices may be deployed in dynamic areas where are out of strict monitoring and protection, fog computing requires security protections to ensure confidentiality and integrity. In this article, to deal with security requirements and considering the distinctive features, a key management based on hypergraph schemed is designed. Firstly, based on the key hypergraph, the three hierarchy architecture of fog computing is divided into two subnetworks. Furthermore, each key management process of both two subnetworks is designed to satisfy the operational and security requirements of fog computing. Finally, the performance evaluation and numerical simulation have been provided to validate the proposed scheme.

关键词： fog computing fog security keymanagement hypergraph

Improved construction of LDPC convolutional codes with semi-random parity-check matrices

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Science China(Information Sciences) 2014年第2期57卷 37-46页

作者： MU liwei liu XingCheng LIANG ChuLong School of Information Science and Technology Sun Yat-sen University School of Physics and Telecommunication Engineering South China Normal University State Key Laboratory of Integrated Services Networks Xidian University Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal University

In this paper,we investigate the construction of time-varying convolutional low-density paritycheck(LDPC)codes derived from block LDPC codes based on improved progressive edge growth(PEG)*** from the conventional PEG algorithm,the parity-check matrix is initialized by inserting certain *** specifically,the submatrices along the main diagonal are fixed to be the identity matrix that ensures the fast encoding feature of the LDPC convolutional ***,we insert a nonzero pattern into the secondary diagonal submatrices that ensures the encoding memory length of the time-varying LDPC convolutional codes as large as *** this semi-random structure,we have analyzed the code performance by evaluating the number of short cycles as well as the the bound of free *** results show that the constructed LDPC convolutional codes perform well over additive white Gaussian noise(AWGN)channels.

关键词： low-density parity-check(LDPC) convolutional code block code memory length cycle free distance

A Non-Cooperative Differential Game-Based Security Model in Fog Computing

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China Communications 2017年第1期14卷 180-189页

作者： Zhi Li Xianwei Zhou yanzhu liu Haitao Xu Li Miao School of Computer and Communication Engineering University of Science and Technology Beijing (USTB) Beijing 100083 China Great Wall Computer Software and Systems Inc. Beijing 100190 China

Fog computing is a new paradigm providing network services such as computing, storage between the end users and cloud. The distributed and open structure are the characteristics of fog computing, which make it vulnerable and very weak to security threats. In this article, the interaction between vulnerable nodes and malicious nodes in the fog computing is investigated as a non-cooperative differential game. The complex decision making process is reviewed and analyzed. To solve the game, a fictitious play-based algorithm is which the vulnerable node and the malicious nodes reach a feedback Nash equilibrium. We attain optimal strategy of energy consumption with Qo S guarantee for the system, which are conveniently operated and suitable for fog nodes. The system simulation identifies the propagation of malicious nodes. We also determine the effects of various parameters on the optimal strategy. The simulation results support a theoretical foundation to limit malicious nodes in fog computing, which can help fog service providers make the optimal dynamic strategies when different types of nodes dynamically change their strategies.

关键词： fog computing differential game fog security feedback nash equilibrium

Point-of-Interest Recommendation in LocationBased Social Networks with Personalized Geo-Social Influence

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China Communications 2015年第12期12卷 21-31页

作者： HUANG liwei MA Yutao liu Yanbo Beijing Institute of Remote Sensing School of Computer Wuhan University WISET Automation Company Limited Wuhan Iron and Steel Group Corporation

Point-of-interest(POI) recommendation is a popular topic on location-based social networks(LBSNs).Geographical proximity,known as a unique feature of LBSNs,significantly affects user check-in ***,most of prior studies characterize the geographical influence based on a universal or personalized distribution of geographic distance,leading to unsatisfactory recommendation *** this paper,the personalized geographical influence in a two-dimensional geographical space is modeled using the data field method,and we propose a semi-supervised probabilistic model based on a factor graph model to integrate different factors such as the geographical ***,a distributed learning algorithm is used to scale up our method to large-scale data *** results based on the data sets from Foursquare and Gowalla show that our method outperforms other competing POI recommendation techniques.

关键词： probabilistic geographical integrate prior modeled supervised utilized Recommendation automatically iteration