Multiobjective optimization and multivariable control of the beer fermentation process with the use of evolutionary algorithms

This paper describes empirical research on the model, optimization and supervisory control of beer fermentation.Conditions in the laboratory were made as similar as possible to brewery industry conditions. Since mathematical models that consider realistic industrial conditions were not available, a new mathematical model design involving industrial conditions was first developed. Batch fermentations are multiobjective dynamic processes that must be guided along optimal paths to obtain good results.The paper describes a direct way to apply a Pareto set approach with multiobjective evolutionary algorithms (MOEAs).Successful finding of optimal ways to drive these processes were reported.Once obtained, the mathematical fermentation model was used to optimize the fermentation process by using an intelligent control based on certain rules.

Factors affecting creativity in the architectural education process based on computer-aided design

One of the most influential factors in architectural design is creativity. The enhancement of student creativity is a universally sought objective. This research hypothesized that computeraided design, experience, sketching, physical modeling, learning environment, and images and visual references can serve as powerful tools to stimulate creativity in the architectural design process. It sought to investigate which of these components has the greatest impact on increasing student creativity. A total of 114 bachelor students and 347 master students of Architecture were surveyed using a questionnaire. Data were then analyzed using SPSS and one sample t-test and Friedman test for ranking. Resutts showed that experience can significantty increase the creativity of students in the architectural design process compared to the other components.

Laplace Transformation and Ergodic Potential Kernel for q-Process in Random Environment

This paper introduces some concepts such as q- process in random environment, Laplace transformation, ergodic potential kernel, error function and some basic lemmas.We study the continuity and Laplace transformation of random transition function. Finally, we give the sufficient condition for the existence of ergodic potential kernel for homogeneous q- processes in random environments.

Laser absorption spectroscopy for high temperature H_2O time-history measurement at 2.55 μm during oxidation of hydrogen

Concentration time-histories of H20 were measured behind reflected shock waves during hydrogen combustion. Experiments were conducted at temperatures of 1117-1282 K, the equivalence ratios of 0.5 and 0.25, and a pressure at 2 atm using a mixture of H2/O2 highly diluted with argon. H2O was monitored using tunable mid-infrared diode laser absorption at 2.55 μm （3920.09 cm-1）. These time-histories provide kinetic targets to test and refine reaction mechanisms for hydrogen. Comparisons were made with the predictions of four detailed kinetic mechanisms published in the last four years. Such comparisons of H2O concentration profiles indicate that the AramcoMech 2.0 mechanism yields the best agreement with the experimental data, while CRECK, San Diego, and HP-Mech mechanisms show significantly poor predictions. Reaction pathway analysis for hydrogen oxidation indicates that the reaction H ＋ OH ＋ M = H20 ＋ M is the key reaction for controlling the H2O formation by hydrogen oxidation. It is inferred that the discrepancy of the conversion percentage from H to H20 among these four mechanisms induces the difference of performance on H2O time-history predictions. This work demonstrates the potential of time-history measurement for validation of large reaction mechanisms.

区域地震记录揭示的2023年甘肃积石山6.2级地震震源破裂过程

基于有限断层模型反演方法,利用区域宽频带地震波形数据,反演了2023年12月18日甘肃临夏积石山6.2级地震的震源破裂过程,获得了积石山地震破裂滑动时空分布:此次地震是逆冲兼少量走滑型地震,破裂持续时间约为9 s,主体能量在前6 s释放,地震破裂主要沿断层走向向NW方向拓展,计算得到的标量地震矩为1.39×10^(18)N·m,相当于M_(W)6.02,破裂尺度约10 km左右,最大同震滑动量为35 cm。

城市污水处理过程污泥膨胀识别与抑制综述

污泥膨胀是活性污泥法污水处理过程中常见的一类异常工况,且具有严重危害性,研究污泥膨胀的识别和抑制方法对城市污水处理过程正常运行意义重大.本文主要针对城市污水处理过程中污泥膨胀的识别和抑制方法进行综述.首先,文章概述了城市污水处理过程,介绍了污泥膨胀的概念、主要特点、类型和成因;其次,概述了基于微生物生理特征、机理模型、图像识别和数据驱动的污泥膨胀识别方法,分析其发展现状并指出优缺点;然后,概述了基于过程调控和机理特征的污泥膨胀抑制方法,分析其发展现状并对比优缺点;最后,总结全文,指出了城市污水处理过程污泥膨胀识别和抑制面临的主要问题,并对其研究趋势进行了展望.

数字图像处理及应用虚拟仿真实验平台设计

针对数字图像处理及应用实验教学的需要,结合当下图像处理技术的热点应用,利用虚拟仿真技术、交互操作等信息化手段进行实验教学,设计并开发了数字图像处理及应用虚拟仿真实验教学平台。实验教学平台包含交通标志数字图像处理、图像分类、图像识别、视频处理、自动驾驶应用等5个虚拟仿真实验教学资源,共13个交互实验步骤。该平台特色显著、虚实结合,达到了良好的教学效果,为“新工科”背景下的虚拟仿真实验教学提供有益的参考。

A New Vector Markov Process for M/G/1 Queue

In this paper, by considering the stochastic proces s of the busy period and the idle period, and introducing the unfinished work as a supplementary variable, a new vector Markov process was presented to study th e M/G/1 queue again. Through establishing and solving the density evolution equa tions, the busy-period distribution, and the stationary distributions of waitin g time and queue length were obtained. In addition, the stability condition of th is queue system was given by means of an imbedded renewal process.

A Linear Immigration-Birth-Death Model and Its Statistical Inference

formula of simulation proccss by In this paper, we employ monmnt generating function to obtain some exact transition probability of inlmigration-birth-death（IBD） model and discuss the of sample path and statistical inference with complete observations of the IBD the exact transition density formula.

基于能量均衡的非均匀分簇调度算法

针对无线传感器网络节点能量有限且不可充电的问题,本文提出基于能量均衡的非均匀分簇调度算法(EBNC_CHES)延长网络寿命。EBNC_CHES在麻雀搜索算法的基础上,引入时间竞争机制减少冗余信息获取和能耗传递的同时,采取K-means非均匀分簇均衡簇间网络能量消耗,引入改进的麻雀搜索在簇头选举中均衡簇内能耗。仿真结果表明:该算法与LEACH、EECHS_ISSADE和EESSTBRP相比,冗余信息降低了81%、80%、55%,能耗利用率提高了133%、50%、11.4%,寿命延长了52.8%、43.5%、12.2%。此算法能减少冗余信息,降低网络能耗、延长网络寿命。

Existence results for unilateral contact problem with friction of thermo-electro-elasticity

This work studies a mathematical model describing the static process of contact between a piezoelectric body and a thermally-electrically conductive foundation. The behavior of the material is modeled with a thermo-electro-elastic constitutive law. The contact is described by Signorini＇s conditions and Tresca＇s friction law including the electrical and thermal conductivity conditions. A variational formulation of the model in the form of a coupled system for displacements, electric potential, and temperature is de- rived. Existence and uniqueness of the solution are proved using the results of variational inequalities and a fixed point theorem.

ISAR target recognition based on non-negative sparse coding

Aiming at technical difficulties in feature extraction for the inverse synthetic aperture radar （ISAR） target recognition, this paper imports the concept of visual perception and presents a novel method, which is based on the combination of non-negative sparse coding （NNSC） and linear discrimination optimization, to recognize targets in ISAR images. This method implements NNSC on the matrix constituted by the intensities of pixels in ISAR images for training, to obtain non-negative sparse bases which characterize sparse distribution of strong scattering centers. Then this paper chooses sparse bases via optimization criteria and calculates the corresponding non-negative sparse codes of both training and test images as the feature vectors, which are input into k neighbors classifier to realize recognition finally. The feasibility and robustness of the proposed method are proved by comparing with the template matching, principle component analysis （PCA） and non-negative matrix factorization （NMF） via simulations.

基于OBE理念的电机学课程线上线下混合式教学探索与实践

随着新工科建设的不断推进,社会各行业对高等教育体系所培养人才的需求标准不断提高。电机学作为电力工业领域关键的学科之一,在电气工程及其自动化专业培养体系中占据重要地位。该文针对传统课堂教育模式下学生低头现象多、轻技能重知识等痛点问题,结合电机学课程内容特点,基于OBE理念提出一种适应现代教育需求的混合式教学方案,以学生能力培养为核心对电机学课程教学模式、教学内容、课程评价等多方面进行变革与创新,结合高阶任务驱动,培养学生自主完成知识探究的能力;完善学生评价体系,实现过程评价,对学生创新能力、自主实践能力培养进行全方位追踪,并进行评价分析,以实现持续性改革。

强化特征图的无参考低光照图像增强

针对低光照图像质量不佳、夹杂噪声导致对比度和亮度不足、细节不清晰,且成对的低光照图像数据集获取成本过高的问题,在生物视觉马赫带效应的启发下,提出一种强化特征图的无参考低光照图像增强方法。使用强化滤波块(EFB)对图像和特征图进行特征强化,抑制噪声的同时强化特征细节,提高网络对特征的学习能力。将跳跃连接与空间注意力模块(ESA)结合,通过融合强化的浅层特征与深层特征来提取全局上下文信息和局部区域特征,有效保留了图像的色彩信息,避免细节丢失,提高网络的泛化能力。使用像素估计曲线调整低光照图像像素的动态范围,对其进行亮度增强。实验结果表明,经该算法处理后的图像在PSNR、SSIM、LPIPS和NIQE等指标上分别达到了17.709 dB、0.657、0.239和3.486,该方法相较于现有的主流算法能够更好地达到图像增强目的,有效地提升图像亮度和细节信息,同时保持图像的自然属性。

板栗醋发酵工艺优化及挥发性成分分析

为提高板栗资源利用率,开发板栗深加工产品,以板栗为原料,通过酒精和醋酸发酵,研究开发一款新型板栗醋。以感官评价和酸度的综合评分为评价指标,采用单因素和正交试验对板栗醋进行工艺优化。结果表明,酒精发酵优化后工艺条件为酒精发酵温度22℃、酵母菌添加量0.04%、初始糖度17°Brix、酒精发酵时间5 d;醋酸发酵优化后工艺条件为醋酸发酵温度31℃、果醋菌添加量0.04%、装液量40%、转速170 r/min、醋酸发酵时间8 d,优化后板栗醋总酸20.18 g/L,具有黄色透明质感、板栗果香,味道醇厚。采用顶空固相微萃取(headspace solid phase microextraction,HS-SPME)结合气质联用(gas chromatography-mass spectrometry,GC-MS)测定板栗醋3个发酵阶段的挥发性成分并探究其变化,结果表明,板栗醋3个发酵阶段挥发性成分的含量及种类有明显差异,在板栗浆、酒精发酵和醋酸发酵阶段时,挥发性成分含量最高的分别为乙酸(15.36%)、乙醇(30.26%)和乙酸(41.13%)。

基于层次分析法(AHP)与模糊综合评价相结合的油区输电线路运行状态评价

油田快速建产对油区电力系统可靠性提出更高的要求,架空输电线路的运行状态评价是保障电路安全可靠运行的重要环节。为此,本文提出了基于层次分析法与模糊综合评价相结合的油区输电线路运行状态评价方法。通过选取相关评价指标,搭建输电线路运行状态评价体系,采用层次分析法和模糊综合评价相结合的方式,对输电线路展开综合评价。实验结果表明,该条输电线路运行状态处于“注意”,验证了所提出的状态评价方法的有效性。

攀西某强磁尾矿选钛工艺试验

为了回收利用攀西某选厂强磁选尾矿中的TiO_(2),在矿样性质研究的基础上,开展了尾矿再选钛工艺试验研究。试验结果表明:矿样经粗细分级—细粒级1粗1精1扫强磁选预富集,获得了TiO_(2)品位19.02%、TiO_(2)回收率41.46%的预富集精矿;针对预富集精矿,通过浮选闭路试验,最终获得了产率31.74%、TiO_(2)品位47.14%、TiO_(2)回收率79.11%的钛精矿,全流程钛综合回收率为32.80%;研究成果可为该选厂强磁尾矿再选钛提供技术支撑,对其他强磁尾矿资源的再选具有借鉴意义。

城市小区建设采暖施工过程中的技术质量控制

随着城市化的快速发展,人们对生活品质的要求、室内生活舒适度的需求也随之提高,城市小区建设采暖工程成为保障城市冬季舒适度的重要基础设施。然而,由于多种因素的影响,城市小区采暖工程在综合设计、施工过程、运行维护保障等方面存在一些问题,严重影响了城市整体在整洁、美观等方面的发展。通过分析城市小区建设采暖工程存在的一系列的问题,探讨了加强设计质量的完整、实用性控制,加强施工过程中质量的控制,加强运行维护的管理等质量控制策略,希望能为城市的建筑采暖工程建设施工和管理提供支持和实践性指导。

《中药调剂职业教育规范》解读(一)

《中药调剂职业教育规范》(SCM 72-2022,以下简称《规范》)是全球范围首个关于中药调剂职业教育的国际组织标准,是中医药服务能力建设的重要依据和参考,旨在促进中药调剂工作的规范化、标准化。中药饮片调剂是《规范》中的一个规范性职业教育模块,包括调剂基础知识和调剂实践技能,其中中药饮片调整实践技能涵盖了中药饮片性状辨识、临方炮制、处方应付、调剂供应、处方审核、汤剂煎煮、发药交代、采购验收以及贮存养护等9项中药调剂关键技术,是中药调剂的重要组成部分,也是实现中医临床诊疗效果的重要环节。本研究通过分析中药饮片调剂过程中常见的问题,对中药饮片处方审核技术、中药饮片临方炮制技术、中药饮片处方应付技术与中药饮片发药交代技术进行解读,以方便中药调剂从业人员及时准确掌握和应用《规范》的相关内容,提高中药调剂从业人员的专业素养和技能水平,推进全球范围内中药调剂规范化建设,保障中药饮片调剂质量,进而保障患者的用药安全。

吉尔吉斯斯坦Taldybulak Levoberezhny(左岸)金矿床地质特征及成矿过程分析

Taldybulak Levoberezhny(左岸)金矿床位于吉尔吉斯斯坦北天山东段Aktyuz变质地体中,金矿体赋存于脆韧性变形带中。矿床经历两期金成矿作用,早成矿期低品位(0.1×10^(-6)~2.0×10^(-6))金矿化体受韧性剪切带控制,围岩蚀变主要为硅化和碳酸盐化,发育典型的条带状和块状矿石。主成矿期高品位(5×10^(-6)~15×10^(-6))矿体主要与硅化和电气石化蚀变有关,形成典型的石英电气石岩型矿石。详细的地质接触关系和年代学研究表明矿床两期金成矿作用均形成于早志留世,分别与二长斑岩和闪长岩具有密切成因联系。Taldybulak Levoberezhny金矿床是一个志留纪与洋-陆俯冲增生岛弧岩浆岩有关的具有叠加成矿特点的岩浆热液型金矿床。