摘要：蛋白质作为常用外源物用于鱼糜制品生产过程,在鱼糜制品中添加单一蛋白的研究较多,而鲜少有同时添加两种以上蛋白的研究,因此,文章旨在通过添加3种不同类型蛋白的复配物提升鳕鱼鱼糜的凝胶特性。以凝胶强度、白度、持水性和质构作为单因素试验的指标,得出当添加3%蛋清蛋白、7%金线鱼、7%大豆蛋白时,最大限度提升了鳕鱼鱼糜的凝胶特性。在单因素试验的基础上,通过Box-Behnken的中心组合试验设计原理,测定复合蛋白鱼糜的评定指标,以凝胶强度为响应值,对复合蛋白配方进行优化。结果表明,当蛋清蛋白添加量为2.96%,金线鱼添加量为7.03%,大豆蛋白添加量为6.93%时,凝胶强度达13968.668 g·mm,对鳕鱼鱼糜凝胶特性的提升具有较好的效果。

摘要：为探究青鱼皮明胶的最佳提取工艺,提高青鱼的附加产值。以青鱼皮为原料,以明胶提取率为响应值,基于单因素试验结果,选定关键工艺参数超声时间、酶用量、酶解时间和酶解温度进行Box-Behnken试验设计,探讨各参数及其交互作用对明胶提取率的影响,构建了回归模型,并用红外光谱对所取的明胶进行表征。结果显示:青鱼皮明胶的最佳提取工艺条件为:超声时间125 min、酶用量0.22%、酶解时间154 min和酶解温度45℃,在此条件下进行3次平行试验验证,得到的青鱼皮明胶提取率平均值为18.28%,与预测值之间的相对误差仅为0.22%,这充分证明了所建回归模型的可靠性和高精度。红外光谱表明所提取的物质具有明胶的基本特征。该研究为青鱼皮资源在明胶的开发与应用提供技术参考。

摘要：为解决活鱼在加工、养殖、售卖过程中分选效率低、损伤率高、分选精度低等问题,设计了一种称重式活鱼分选机,可一次性完成活鱼整理、称重、分级等作业工序。根据生产实际运作模式以及功能需求,确定了活鱼分选机进鱼量、进鱼时倾斜角度以及进鱼速度,结合EDEM仿真试验,建立活鱼-分级机离散元模型,系统分析活鱼在收获时的动态过程。以进鱼量、进鱼时倾斜角度和进鱼速度为试验因素,以分级效率和鱼体损伤率为试验指标进行优化分析,得到活鱼分选机最佳工作参数,即进鱼量为3.16条/s、进鱼速度为0.67 m/s、进鱼倾角为35.4°时,鱼损率为1.49%,效率为77.08%,满足活鱼分选工序对分选效率和分选精度的基本要求,为活鱼分级机的设计与开发提供数据支撑和理论依据。

摘要：The ultra-low specific speed centrifugal blower is widely used in energy industries due to its features such as low flow rate,high pressure and low manufacturing cost. However,the width-to-diameter ratio of the above blower becomes relatively small to satisfy the needed operation condition and its performances are considerably degraded as a result of relatively high leakage,disc friction and passage friction loss consequently. The purpose of this paper is to improve its performance through the optimization design of the blade’s profile properly. Based on artificial neural networks (ANN) and hierarchical fair competition genetic algorithms with dynamic niche (HFCDN-GAs),the optimization design approach is established. By conjoining Bezier parameterization and FINE/TURBO solver,the optimized blade is designed by adjusting the profile gradually. An industrial ultra-low specific speed centrifugal blower with parallel hub and shroud has been selected as a reference case for optimization design. The performance investigations of the centrifugal blowers with different types of blades are conducted. The conclusions of the performance improvement of the optimized blade provide positive evidences in the application of the optimization design of the above blower blade.

摘要：To enhance machining efficiency,tool change time has to be ***,for an automatic tool changer attached to a machining center,the tool change time is to be *** the automatic tool changer is a main part of the machining center as a driving *** static attributes of the automatic tool changer using the commercial code,ANSYS Workbench V12,were tried to *** the optimum design of automatic tool changer arm was proposed by performing the multi-stage optimum *** shape optimization of the automatic tool changer was proposed and the result was verified to obtain acceptable *** is possible to obtain an optimized model in which the maximum deformation,maximum stress,and mass are reduced by 10.46%,12.89% and 9.26%,respectively,compared with those of the initial ***,the results between conventional method by the design of experiments and proposed method by the multi-stage optimum design method were compared.

摘要：简单异尖线虫(Anisakis simplex)是海产品中能引起食源性人兽共患寄生虫病的有害寄生虫,不仅会影响海产品质量,而且威胁公众的健康,造成极大的经济损失。本研究根据简单异尖线虫rDNA的ITS区基因序列设计了特异性引物,开发了一种重组酶辅助扩增联合侧流试纸的检测方法(RAA-LFD)。结果显示,该方法仅需2.5μΜ的引物浓度,37 ℃下35 min即可对结果实现可视化。特异性检测结果表明,该方法与2种属内典型异尖线虫、派式异尖线虫,3种属间的费式宫脂线虫、厦门宫脂线虫、舟山宫脂线虫和2株水产常见的食源性病原菌副溶血性弧菌和单增李斯特菌无交叉反应,特异性良好;检测灵敏度低至9.1×101 fg/μL的简单异尖线虫基因组DNA。在模拟样品检测中,RAA-LFD法可在100 g带鱼肉中检出单条简单异尖线虫的混入污染,应用效果良好。本实验建立的RAA-LFD可视化检测体系快速、灵敏、特异,可应用于海产品中异尖线虫的检测。

摘要：面对特立独行、讲求个性的90后消费群体，如何定义社交？如何为社交动物、挑剔吃货设计一次酣畅淋漓的约饭聚会？如何跳出以往的营销边界，以一种完全不套路的方式引领风潮，吸引90后蜂拥而至、愉悦体验？

摘要：工业遗产景观、后工业景观、工业旅游景观是构成城市工业景观的要素,反映了城市不同时期工业文明和工业发展历程。应用城市规划理论和方法将工业景观系统作为城市子系统进行研究,可将历史与现代、保护与发展、微观与宏观、物质与非物质多层面进行整合优化,从工业景观的现状研究、功能规划、空间布局、文脉保护等方面提出城市工业景观系统规划的路径,实现城市工业景观的可持续发展。

摘要：提出了利用近红外光谱技术对重金属污染泥蚶的快速检测方法。以冷冻干燥磨粉的泥蚶肌肉为试验对象,方案设计分为两种:对照泥蚶和单一重金属(Cd,Cu,Pb或Zn)污染泥蚶的分类(设计Ⅰ);所有样本包括对照泥蚶和4种重金属污染泥蚶的分类(设计Ⅱ)。采用两种识别算法,即最小二乘支持向量机和随机森林,对设计I和设计II分别建立分类模型并进行预测。预测结果表明:设计Ⅰ:最小二乘支持向量机和随机森林的平均预测正确率分别为100%和95%;设计Ⅱ:最小二乘支持向量机和随机森林的平均预测正确率分别为96%和92%。利用近红外光谱技术快速检测重金属污染泥蚶具有可行性,可为泥蚶重金属污染提供一种快速检测方法。