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响应面法优化酱牛肉超声-脉动滚揉腌制工艺

南京农业大学学报 2025年第1期48卷 206-219页

作者：曾晓庆冯美琴孙健南京农业大学食品科学技术学院/肉品质量控制与新资源创制全国重点实验室江苏南京210095 金陵科技学院动物科学与食品工程学院江苏南京210038

[目的]本文旨在明确超声和脉动滚揉腌制联用对酱牛肉品质的具体工艺参数。[方法]以牛腿肉为原料,分别以超声时间、超声功率、脉动滚揉时间为单因素,通过质构、剪切力、模糊感官评分、色差筛选出较优的单因素范围,并在单因素试验基础上... 详细信息

[目的]本文旨在明确超声和脉动滚揉腌制联用对酱牛肉品质的具体工艺参数。[方法]以牛腿肉为原料,分别以超声时间、超声功率、脉动滚揉时间为单因素,通过质构、剪切力、模糊感官评分、色差筛选出较优的单因素范围,并在单因素试验基础上以剪切力、模糊感官评分为响应值进行响应面优化试验。[结果]试验得到最佳工艺参数:超声时间108 min、超声功率255 W、脉动滚揉时间3 h。此时得到酱牛肉剪切力为37.94 N,模糊感官评分为89.70分,与模型理论值相近。与传统静态腌制相比,用最佳超声-脉动滚揉腌制工艺制作的酱牛肉剪切力显著降低、模糊感官评分提高,色泽得到改善。两因素交互作用结果表明,超声功率和超声时间对酱牛肉剪切力影响显著,超声时间和脉动滚揉时间对酱牛肉模糊感官评分影响显著,因此在实际生产中需根据需求选择合适的腌制参数。[结论]超声-脉动滚揉腌制工艺提高了酱牛肉的嫩度,同时改善了酱牛肉的质构和色泽,提高了酱牛肉品质;超声-脉动技术联用是促进超声技术应用与肉制品腌制的有效策略。

关键词：超声腌制脉动滚揉酱牛肉响应面法优化

Inexact proximal gradient algorithm with random reshuffling for nonsmooth optimization

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Science China(Information Sciences) 2025年第1期 219-237页

作者： Xia jianG Yanyan FANG Xianlin ZENG jian sun Jie CHEN National Key Lab of Autonomous Intelligent Unmanned Systems School of AutomationBeijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center School of Electronic and Information Engineering Tongji University

Proximal gradient algorithms are popularly implemented to achieve convex optimization with nonsmooth regularization. Obtaining the exact solution of the proximal operator for nonsmooth regularization is challenging because errors exist in the computation of the gradient; consequently, the design and application of inexact proximal gradient algorithms have attracted considerable attention from researchers. This paper proposes computationally efficient basic and inexact proximal gradient descent algorithms with random reshuffling. The proposed stochastic algorithms take randomly reshuffled data to perform successive gradient descents and implement only one proximal operator after all data pass through. We prove the convergence results of the proposed proximal gradient algorithms under the sampling-without-replacement reshuffling *** computational errors exist in gradients and proximal operations, the proposed inexact proximal gradient algorithms can converge to an optimal solution neighborhood. Finally, we apply the proposed algorithms to compressed sensing and compare their efficiency with some popular algorithms.

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Mechanics criterion and factors affecting overburden stability in solid dense filling mining

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International Journal of Mining Science and Technology 2017年第3期27卷 407-413页

作者： sun jian School of Energy and Safety Anhui University of Science & Technology State Key Laboratory for Geomechanics & Deep Underground Engineering China University of Mining & Technology

The effect of controlling strata movement in solid filling mining depends on the filling rate of the goal. However, the mechanical property of the overburden in the backfill stope and the designed size of the backfill mining workface should also be considered. In this study, we established a main roof strata model with loads in accordance with the theory of key strata to investigate the stability of the overburden in solid dense filling mining. We analyzed the stress distribution law of the main roof strata based on elastic thin plate theory. The results show that the position of the long side midpoint of the main roof strata failed more easily because of tensile yield, indicating that this position is the area where failure is likely to occur more easily. We also deduced the stability mechanics criterion of the main roof strata based on tensile yield criterion. The factors affecting the stability of the overburden in solid dense filling mining were also analyzed, including the thickness and elasticity modulus of the main roof strata, overlying strata loads, advanced distance and length of workface, and elastic foundation coefficient of backfill body. The research achievements can provide an important theoretical basis for determining the designed size of the solid dense filling mining workface.

关键词： Filling mining Strata movement Stability control Influencing factors Size design

Composite Anti-Disturbance Control of Hidden Semi-Markov Jump Systems via Disturbance Observer

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Journal of Systems Science & Complexity 2023年第6期36卷 2255-2273页

作者： MEN Yunzhe sun jian National Key Lab of Autonomous Intelligent Unmanned Systems School of AutomationBeijing Institute of TechnologyBeijing100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120China

This paper focuses on the disturbance suppression issue of hidden semi-Markov jump systems leveraging composite *** system consists of a semi-Markov layer and an observed mode sequence layer,and it is subject to a matched disturbance generated by an exogenous system and a mismatched disturbance that is norm *** proposal is to design a composite controller based on a disturbance observer to counteract and attenuate the disturbances *** constructing a special Lyapunov function comparison point,the exponential stability is analyzed with the stability criterion in the form of linear matrix inequality is *** simulation examples are provided to demonstrate the practical merits of the composite controller relative to the single H_(∞)control.

关键词： Composite control disturbance observer ε-error hidden semi-Markov jump systems

Predicting protein subchloroplast locations:the 10th anniversary

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Frontiers of Computer Science 2021年第2期15卷 1-11页

作者： jian sun Pu-Feng DU College of Intelligence and Computing Tianjin UniversityTianjin300350China

Chloroplast is a type of subcellular organelle in green plants and *** is the main subcellular organelle for conducting photosynthetic *** proteins,which localize within the chloroplast,are responsible for the photosynthetic process at molecular *** chloroplast can be further divided into several *** in different compartments are related to different steps in the photosynthetic *** the molecular function of a protein is highly correlated to the exact cellular localization,pinpointing the subchloroplast location of a chloroplast protein is an important step towards the understanding of its role in the photosynthetic *** process for determining protein subchloroplast location is always costly and time ***,computational approaches were developed to predict the protein subchloroplast locations from the primary *** the last decades,more than a dozen studies have tried to predict protein subchloroplast locations with machine learning *** sequence features and various machine learning algorithms have been introduced in this research *** this review,we collected the comprehensive information of all existing studies regarding the prediction of protein subchloroplast *** compare these studies in the aspects of benchmarking datasets,sequence features,machine learning algorithms,predictive performances,and the implementation *** summarized the progress and current status in this special research *** also try to figure out the most possible future works in predicting protein subchloroplast *** hope this review not only list all existing works,but also serve the readers as a useful resource for quickly grasping the big picture of this research *** also hope this review work can be a starting point of future methodology studies regarding the prediction of protein subchloroplast locations.

关键词： subchloroplast locations sequence features performance measures online services machine learning

Twistors for modules over algebras

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Science China Mathematics 2016年第7期59卷 1327-1344页

作者： sun jian Cai Department of Mathematics Shanghai University

We study the concept of module twistor for a module over an algebra. This concept provides a unifying framework for various deformed constructions of modules over algebras, such as module R-matrices,(n-factor iterated) twisted tensor products and L-R-twisted tensor products of algebras. Among the main results,we find the relations among these constructions. Furthermore, we study some properties of module twistors.

关键词： twistor module algebra

Enhanced metronidazole removal by binary-species photoelectrogenic biofilm of microaglae and anoxygenic phototrophic bacteria

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Journal of Environmental Sciences 2022年第5期34卷 25-36页

作者： Xubin Zhang jian sun Mengmeng Zhao Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

High efficient removal of antibiotics during nutriments recovery for biomass production poses a major technical challenge for photosynthetic microbial biofilm-based wastewater treatment since antibiotics are always co-exist with nutriments in wastewater and resist biodegradation due to their strong biotoxicity and *** this study,we make a first attempt to enhance metronidazole(MNZ)removal from wastewater using electrochemistry-activated binary-species photosynthetic biofilm of Rhodopseudomonas Palustris(***)and Chlorella vulgaris(***)by cultivating them under different applied *** results showed that application of external potentials of-0.3,0 and 0.2 V led to 11,33 and 26-fold acceleration in MNZ removal,respectively,as compared to that of potential *** extent of enhancement in MNZ removal was positively correlated to the intensities of photosynthetic current produced under different externally applied *** binary-species photoelectrogenic biofilm exhibited 18 and 6-fold higher MNZ removal rate than that of single-species of *** and ***,respectively,due to the enhanced metabolic interaction between *** of an external potential of 0V significantly promoted the accumulation of tryptophan and tyrosine-like compounds as well as humic acid in ex-tracellular polymeric substance,whose concentrations were 7.4,7.1 and 2.0-fold higher than those produced at potential free,contributing to accelerated adsorption and reductive and photosensitive degradation of MNZ.

关键词： Photoelectrogenic biofilm Microalgae Anoxygenic phototrophic bacteria Photosynthetic current Antibiotic

Hybrid Adaptive Event-Triggered Consensus Control with Intermittent Communication and Control Updating

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Journal of Systems Science & Complexity 2024年第6期37卷 2390-2405页

作者： YUAN Shuo YU Chengpu sun jian School of Automation Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

This paper studies the distributed consensus control for linear multi-agent systems under discontinuous communication and control updating.A fully distributed event-triggered adaptive control protocol with strictly positive minimum interevent time(MIET)guarantees is ***,an event-triggered distributed adaptive control law without using prior global information of network topologies is presented,which achieves asymptotic consensus via discrete control updating and intermittent ***,a hybrid adaptive event-triggering scheme with an internal timer is designed that is activated only when the timer decreases to zero from a specified positive *** the proposed triggering scheme,not only Zeno behavior is excluded but also a strictly positive MIET between any two consecutive events is guaranteed,which facilitates the physical *** contrast to the existing related results,the proposed fully distributed protocol only needs low-frequency communication and control updating,while ensuring the strictly positive MIET ***,a simulation example is given to illustrate the effectiveness of the theoretical results.

关键词： Adaptive event-triggered control consensus discrete control updating intermittent communication positive minimum interevent time

A survey on Lyapunov-based methods for stability of linear time-delay systems

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Frontiers of Computer Science 2017年第4期11卷 555-567页

作者： jian sun Jie CHEN School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Intelligent Control and Decision of Complex System Beijing Institute of Technology Beijing 100081 China

Recently, stability analysis of time-delay systems has received much attention. Rich results have been obtained on this topic using various approaches and techniques. Most of those results are based on Lyapunov stability theories. The purpose of this article is to give a broad overview of stabil- ity of linear time-delay systems with emphasis on the more recent progress. Methods and techniques for the choice of an appropriate Lyapunov functional and the estimation of the derivative of the Lyapunov functional are reported in this ar- ticle, and special attention is paid to reduce the conservatism of stability conditions using as few as possible decision vari- ables. Several future research directions on this topic are also discussed.

关键词： time-delay system,ity delay-dependent stability,Lyapunov-Krasovskii functionaldelay-independent stabil-linear matrix inequality,