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中药材干燥技术与装备研究现状

农业工程学报 2024年第2期40卷 1-28页

作者：王乐意李长河刘明政李康叶祥瑞王子文范林政王仁坤赵华洋坎杂张国华邬健康青岛理工大学机械与汽车工程学院青岛266520 内蒙古民族大学工学院通辽028042 石河子大学机械电气工程学院石河子832003 山东五康轩现代农林发展有限公司邹城273500

中药材在采收后需经过产地初加工处理,其中干燥是产地初加工的必要环节,并直接影响到中药材的品质。传统的自然干燥方式效率低,且药材干燥品质良莠不齐,严重制约中药产业的发展。因此,加强对中药材干燥技术与装备的研究尤为迫切。基于此... 详细信息

中药材在采收后需经过产地初加工处理,其中干燥是产地初加工的必要环节,并直接影响到中药材的品质。传统的自然干燥方式效率低,且药材干燥品质良莠不齐,严重制约中药产业的发展。因此,加强对中药材干燥技术与装备的研究尤为迫切。基于此,该研究综述了中药材干燥技术与装备的研究现状。首先,总结中药材的干燥脱水过程与理化性质变化规律,分析了药材自身特性与干燥条件对水分脱除速率与干燥品质的影响机制。其次,针对热风、热泵、红外、微波、真空与高压电场干燥技术,以干燥机理为基础,总结各类干燥技术的装备结构与工作原理,分析了干燥装备存在的干燥不均匀、能耗大、效率低等问题并探讨了相应改善方法。同时,研究了各类干燥技术在不同工艺条件下的干燥效果,分析了干燥温度、切片厚度、真空度等工艺参数对干燥效果的影响规律,探讨了预处理、阶段式变温变湿、间歇式干燥等赋能干燥效果的工艺手段,并综合干燥品质、干燥效率与干燥成本,得到了各类干燥技术的优缺点与适用范围。进一步地,分析了微波-真空、微波-热风与远红外-热泵三类联合干燥技术不同组合方式下的干燥机理,阐述了各类联合干燥装备的研发进展,探讨了联合干燥技术相较于单一干燥技术的优势以及装备和工艺存在的不足。最后,从提高中药材品质评价标准、完善干燥相关模型、加强干燥装备研发三方面对研究方向进行了展望,以期为中药材干燥技术研究与装备创新研发提供理论依据与技术支持。

关键词：中药材干燥机理装备效果工艺

Distributed optimization with Markovian switching targets and stochastic observation noises with applications to DC microgrids

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Science China(Information Sciences) 2022年第12期65卷 232-247页

作者： Siyu XIE leyi wang Masoud H.NAZARI George YIN Gun LI School of Aeronautics and Astronautics University of Electronic Science and Technology of China Department of Electrical and Computer Engineering Wayne State University Department of Mathematics University of Connecticut

A distributed optimization problem with Markovian switching targets and stochastic observation noises is considered in this paper. In order to solve target following and renewable following for microgrid(MG) optimal power balancing, and to attenuate observation noises simultaneously, distributed optimization algorithms are developed. The interaction between observation noises and Markovian switching targets may introduce a fundamental tradeoff in reducing the optimization errors and choosing the step size. Furthermore, under infrequent Markovian switching assumptions, the mean-square optimization error bounds, the switching ordinary differential equation(ODE) limit, and the asymptotic distributions of the optimization errors are established rigorously and comprehensively. A simulation example on a DC MG is presented to show the main results of the paper.

关键词： constraint optimization noisy observation output variation Markovian switching target distributed algorithm DC microgrid

CML、sRAGE、esRAGE对冠心病动脉粥样硬化的诊断价值

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中国实验诊断学 2024年第5期28卷 519-522页

作者：李玲郭健王乐怡张秀敏新疆维吾尔自治区人民医院新疆乌鲁木齐830001

目的探讨ε-羧甲基赖氨酸(CML)、可溶性晚期糖基化终产物受体(sRAGE)、内源性可溶性晚期糖基化终产物受体(esRAGE)对冠心病动脉粥样硬化的诊断价值。方法2020年6月至2022年12月,于新疆维吾尔自治区人民医院选取冠心病患者100例作为观察... 详细信息

目的探讨ε-羧甲基赖氨酸(CML)、可溶性晚期糖基化终产物受体(sRAGE)、内源性可溶性晚期糖基化终产物受体(esRAGE)对冠心病动脉粥样硬化的诊断价值。方法2020年6月至2022年12月,于新疆维吾尔自治区人民医院选取冠心病患者100例作为观察组。同时选取100例在我院体检的正常人作为对照组。比较两组ε-羧甲基赖氨酸(CML)、可溶性晚期糖基化终产物受体(sRAGE)和内源性分泌性晚期糖基化终产物受体(esRAGE)水平。应用受试者操作者特征(ROC)曲线评价CML、sRAGE、esRAGE的诊断水平,并联合检测冠心病动脉粥样硬化。结果与对照组相比,观察组血清CML及sRAGE水平明显升高,而esRAGE水平呈下降趋势。血清CML、sRAGE和esRAGE可准确诊断冠心病动脉粥样硬化,联合检测灵敏度(90.91%)、特异性(68.66%)、准确性(76.00%)、阳性预测值(58.82%)、阴性预测值(93.88%)、ROC曲线下面积(AUC)(0.922)较高。结论CML、sRAGE、esRAGE与冠心病动脉粥样硬化有关,有利于临床诊断和治疗。

关键词： ε-羧甲基赖氨酸可溶性晚期糖基化终产物受体内源性分泌性晚期糖基化终产物受体冠状动脉粥样硬化性心脏病

Ultrafast investigation of room temperature valley polarization in“optical bilayer”WS_(2)

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Science China(Technological Sciences) 2024年第1期67卷 91-97页

作者： ZHAO leyi wang Hai LIU TianYu LI FangFei ZHOU Qiang wang HaiYu Synergetic Extreme Condition High-Pressure Science Center State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun 130012China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Monolayer transition metal dichalcogenides(TMDCs)have become a promising platform in valleytronics due to possessing the regulatable valley degrees of ***,as a result of the rapid intervalley scattering,it is difficult to measure the PL valley polarization of monolayer TMDCs at room temperature,which limits their application in valleytronics ***,we report a room temperature photoluminescence(PL)valley polarization up to 3.73%in an“optical bilayer”WS_(2)formed by transferring monolayer WS_(2)onto flat Ag ***,in the transient absorption(TA)measurements,a remarkably long valley depolarization lifetime is ***,we demonstrate the valley properties of such“optical bilayer”WS_(2)resemble actual bilayer WS_(2),in which the robust valley polarization can be attributed to the phonons depletion effect and the blocked interlayer hopping *** peculiar valley features in“optical bilayer”WS_(2)provide a particularly simple method to enhance valley control at room temperature.

关键词： valleytronics optical bilayer transient absorption tungsten disulfide

Fault diagnosis for lithium-ion batteries in electric vehicles based on signal decomposition and two-dimensional feature clustering

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Green Energy and Intelligent Transportation 2022年第1期1卷 121-132页

作者： Shuowei Li Caiping Zhang Jingcai Du Xinwei Cong Linjing Zhang Yan Jiang leyi wang National Active Distribution Network Technology Research Center(NANTEC) Beijing Jiaotong UniversityBeijing 100044China Sunwoda Electronic Co. Ltd.Shenzhen518100China Department of Electrical&Computer Engineering Wayne State UniversityDetroitMI 48202USA

Battery fault diagnosis is essential for ensuring the reliability and safety of electric vehicles(EVs).The existing battery fault diagnosis methods are difficult to detect faults at an early stage based on the real-world vehicle data since lithium-ion battery systems are usually accompanied by inconsistencies,which are difficult to distinguish from faults.A fault diagnosis method based on signal decomposition and two-dimensional feature clustering is introduced in this *** geometry mode decomposition(SGMD)is introduced to obtain the components characterizing battery states,and distance-based similarity measures with the normalized extended average voltage and dynamic time warping distances are established to evaluate the state of *** 2-dimensional feature clustering based on DBSCAN is developed to reduce the number of feature thresholds and differentiate flaw cells from the battery pack with only one parameter under a wide range of *** proposed method can achieve fault diagnosis and voltage anomaly identification as early as 43 days ahead of the thermal *** the results of four electric vehicles and the comparison with other traditional methods validated the proposed method with strong robustness,high reliability,and long time scale warning,and the method is easy to implement online.

关键词： Electric vehicle Fault diagnosis Extended average voltage Dynamic time warping Feature clustering

Network Robustness Depth and Topology Management of Networked Dynamic Systems

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Journal of Systems Science & Complexity 2016年第1期29卷 1-21页

作者： wang leyi LIN Feng YIN George Department of Electrical and Computer Engineering Wayne State University Department of Mathematics Wayne State University

Networked control systems are subject to adversary conditions that affect their network *** ensure reliable system operations,network topologies need to be characterized and managed for their impact on the overall system *** paper introduces the concept of network robustness depth for this *** event systems are used as a foundation to model dynamic behavior of network topologies,support their analysis,and carry out their *** analysis relates the link reliability probabilities to a probabilistic characterization of network robustness *** topology management strategies are discussed,including passive methods,random strategies,and optimization *** respective benefits and limitations are *** using platoon control as a platform of hybrid(continuous and discrete event) systems and packet erasure channels as a communication protocol,the results are demonstrated with case studies.

关键词：系统科学系统学系统工程理论

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氰渣有价金属浮选回收试验研究与应用

黄金 2024年第7期45卷 51-59页

作者：马鹏程王乐译姜桂鹏高金成孙其飞杨鹏赵娜山东招金集团有限公司

为提高氰渣的资源利用率,解决氰渣中有价金属浮选精矿品位不高、回收率低的问题,开展了氰渣性质分析及回收铜、铅、锌的试验研究。根据试验研究结果,结合现场实际情况进行了工艺优化改造和药剂制度调整,生产实践表明:采用铅优先浮选—... 详细信息

为提高氰渣的资源利用率,解决氰渣中有价金属浮选精矿品位不高、回收率低的问题,开展了氰渣性质分析及回收铜、铅、锌的试验研究。根据试验研究结果,结合现场实际情况进行了工艺优化改造和药剂制度调整,生产实践表明:采用铅优先浮选—浮铅尾矿选铜工艺流程,在铅浮选活化剂ZJT用量3000 g/t、捕收剂乙硫氮用量100 g/t,铜浮选活化剂ZJT用量2500 g/t、捕收剂ZJB-2用量100 g/t,浮选流程均为一次粗选两次精选两次扫选的条件下,可以获得铅精矿铅品位22.32%、铅回收率45.76%,锌品位14.47%、锌回收率31.78%,铜精矿铜品位15.38%、铜回收率42.22%的良好指标。改造后,铅精矿铅、锌品位合计提高8~40百分点,铜精矿铜品位提高3~13百分点。

关键词：氰渣铅浮选铜浮选有价金属捕收剂

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How much information is needed in quantized nonlinear control?

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Science China(Information Sciences) 2018年第9期61卷 205-217页

作者： Chuang ZHENG Lin LI leyi wang Chanying LI School of Mathematical Sciences Beijing Normal University Department of Electrical and Computer Engineering Wayne State University Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciences

Quantization rate is a crucial measure of complexity in determining stabilizability of control systems subject to quantized state measurements. This paper investigates quantization complexity for a class of nonlinear systems which are subjected to disturbances of unknown statistics and unknown bounds. This class of systems includes linear stablizable systems as special cases. Two lower bounds on the quantization rates are derived which guarantee input-to-state stabilizability for continuous-time and sampled-data feedback strategies, respectively. Simulation examples are provided to validate the results.

关键词： nonlinear systems disturbances input-to-state stabilizability sampled systems quantization rate

牛羊毛发中3种β-受体激动剂药物残留测定的EMR-Lipid方法研究

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畜牧与兽医 2024年第2期56卷 55-61页

作者：李文辉于寒冰倪香艳张晶晶魏紫嫣王乐宜赵雅妮赵莹方芳孙志文北京市农产品质量安全中心北京102600

旨在建立一种以牛羊毛发为靶标结合强化基质去除技术(EMR-Lipid)对3种β-受体激动剂药物(克伦特罗、莱克多巴胺、沙丁胺醇)残留量进行测定的方法。毛发样品经选取、清洗、干燥、研磨后,经酸水解和氨化乙腈提取后加入到Captiva EMR-Lipi... 详细信息

旨在建立一种以牛羊毛发为靶标结合强化基质去除技术(EMR-Lipid)对3种β-受体激动剂药物(克伦特罗、莱克多巴胺、沙丁胺醇)残留量进行测定的方法。毛发样品经选取、清洗、干燥、研磨后,经酸水解和氨化乙腈提取后加入到Captiva EMR-Lipid净化柱,加入石墨化炭黑(GCB)进行净化,过滤后用高效液相色谱-串联质谱仪进行测定,采用正离子(ESI^(+))扫描,多反应监测(MRM)模式进行分析,内标法定量。结果显示:待测药物在0.1~100 ng/mL的浓度范围内具有良好的线性相关性,相关系数R2≥0.995;方法检测限(LOD)为0.2μg/kg,定量限(LOQ)为0.5μg/kg;药物在1、20、100μg/kg添加浓度下,平均回收率为70%~120%,相对标准偏差≤20%。该方法取样方便,前处理步骤少,灵敏度和精密度高,符合残留检测要求,为动物性产品中β-受体激动剂类药物残留量测定提供了参考。

关键词：牛羊毛发 β-受体激动剂 EMR-Lipid技术残留检测

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