Application of Vis–NIR hyperspectral imaging in classification between fresh and frozen-thawed pork Longissimus Dorsi muscles

Fresh and frozen-thawed (F-T) pork meats were classified by Vis–NIR hyperspectral imaging. Eight optimal wavelengths (624, 673, 460, 588, 583, 448, 552 and 609 nm) were selected by successive projections algorithm (SPA). The first three principal components (PCs) obtained by principal component analysis (PCA) accounted for over 99.98% of variance. Gray-level-gradient co-occurrence matrix (GLGCM) was applied to extract 45 textural features from the PC images. The correct classification rate (CCR) was employed to evaluate the performance of the partial least squares-discriminate analysis (PLS-DA) models, by using (A) the reflected spectra at full wavelengths and (B) those at the optimal wavelengths, (C) the extracted textures based on the PC images, and (D) the fused variables combining spectra at the optimal wavelengths and textures. The results showed that the best CCR of 97.73% was achieved by applying (D), confirming the high potential of textures for fresh and F-T meat discrimination.     

Licence de brevet et partage du risque: Résultats de simulation

Annals of Telecommunications - Le partage du risque est une des raisons les plus souvent avancées pour expliquer les clauses financières des contrats de licence. Pour autant, aucune...     

安全、可靠的故障信息管理系统初探

本文介绍如何利用安全、可靠的故障信息管理系统，进行机房机器故障的评估、分析、诊断、修复，实现故障维护信息管理自动化。     

Thermal investigations of an experimental active magnetic regenerative refrigerator operating near room temperature

In this paper, numerical and experimental investigations on a magnetic refrigeration device based upon the active magnetic regeneration (AMR) cycle operating near room temperature are presented. A numerical 1D model based on the transient energy equations is proposed for modelling the heat exchange between the magnetocaloric material and the carrier fluid in the regenerator bed. The validity of 1D AMR-numerical model is investigated through the recently developed magnetic cooling demonstrator by Clean Cooling Systems SA (CCS) at the University of Applied Sciences of western Switzerland (HES−SO). The obtained results including the temperature span, the coefficient of performance and the cooling power are presented and discussed. In general, good agreements have been noted between the experimental and numerical results.     

醋酸酯淀粉浆料粘附性能的研究

采用浸浆粗纱法研究醋酸酯淀粉浆料的粘附性能，以粗纱条的最大强力和断裂功为量化指标定量研究了淀粉品种、变性程度以及混合浆组分与其粘附性能的对应关系。试验表明，醋酸酯化变性能够改善淀粉对纤维的粘附性能；在变性程度相同时，醋酸酯马铃薯淀粉的粘附性能最好，醋酸酯玉米淀粉次之，醋酸酯木薯淀粉最差；用取代度为0．019的醋酸酯玉米淀粉与PVA-1799混配，在粘附性能方面能够达到玉米原淀粉与PVA-1788混用的效果。     

一段炉催化剂蒸汽烧碳小结

介绍一段炉析碳原因,催化剂析碳后的措施及烧碳过程。     

Java语言中的继承与多态

在Java教学时、类的继承、多态是教学中的重点和难点。通过用内存解析的方法来讲解继承与多态,更容易被学生接受和理解。     

影响汽轮发电机组安全运行的几个问题分析和处理

在汇总了近年省内汽轮机方面暴露出的一些机组安全运行问题的基础上，将几个典型且危害性较大的问题进行分析，并提出防范措施及处理方法。     

6kW柴油发电机组稳态与动态过程的仿真与分析

发电机组是由内燃机和发电机构成的发电系统。出于柴油发电机组系统仿真效率和精度的需要,提出了一种基于AMESim虚拟环境的软件仿真方案。根据6k W柴油发电机组的结构形式利用各应用库中的元件建立了机组的系统仿真模型;对机组进行不同转速下的稳定输出电压和额定负载下的气缸压力仿真,并与试验数据对比证明了模型的正确性;在此基础上,对机组进行了空载起动特性和带负载特性仿真,结果表明6柴油发电机组转速瞬态调整率较小,调节时间亦较短,能够显示良好的动态特性。