我国废弃油脂回收利用现状及产业化分析

为保障公众饮食安全和促进废弃油脂资源的合理利用,通过相关文献的系统调研与全面分析,结合专家咨询与实地考察,系统分析我国废弃油脂回收利用技术发展现状、产业化竞争优势及面临的挑战,并提出产业化建议。我国对废弃油脂的回收利用技术研究与成果转化非常活跃,已形成产业化。我国废弃油脂回收利用产业化具有市场规模大、能源转型与环保需求高、国家政策支持等竞争优势,但目前仍存在废弃油脂集运、处理技术及管理水平低,加工技术与管理水平不足,产品质量与利用水平有待提升等问题。从建立企业认证规范,统筹废弃油脂回收监督,加快产业技术创新,激发公众主体意识等方面提出了产业化发展的建议。综上,我国废弃油脂回收利用产业发展前景广阔,但仍面临较大挑战,亟待政府、高校、企业及公众共同努力推动废弃油脂回收利用的产业化发展。

蒸发器集液管结构对芯体表面温度分布的影响

通过调整蒸发器集液管内部插入隔片位置和开孔尺寸,可以实现蒸发器内部制冷剂分配特性的优化。结果表明,蒸发器集液管内插入带孔隔片能明显改善制冷剂的流量分配特性,从而提高蒸发器芯体制冷性能及其表面温度均匀性。

水下气泡光学图像识别方法（英文）

针对水中气泡与固体悬浮微粒不易区分的问题,提出了一种基于Zernike矩与灰度计算的水下光学气泡图像识别方法。该方法主要分为图像划分、图像预处理和特征提取三个步骤。首先,获取水下悬浮微粒的图像,从中划分出单个气泡并选取部分样本;为了更好地提取与表示气泡轮廓与灰度特征,然后采用图像预处理方法增强气泡边缘特征,选择并构建气泡特征库;最后,采用Zernike矩计算悬浮微粒特征的相似度,区分圆形微粒与非圆形微粒,之后计算微粒中心与灰度变化趋势,辨别气泡与固体悬浮微粒。实验结果表明,在测试数据集上的气泡识别准确率达到94%。该方法不仅能够辨别圆形与非圆形微粒,而且能够融合灰度梯度计算方法以获取更好的结果。该方法从形状与灰度两个方面提取与辨别目标的特征信息,提高了气泡识别精度,具有较高的精确性与适用性。

Research on key techniques of expendable conductivity temperature depth measuring system

This paper analysis the developing of expendable conductivity temperature depth measuring system(XCTD)and introduce its principle of measuring about temperature,salinity and depth of ocean.Some key techniques are put forward.According to the real needs of XCTD,conductivity sensor with high sensitivity is designed by principle of electromagnetic induce,the ocean conductivity from induced electromotive force has been calculated.Adding temperature correction circuit would help to reduce error of conductivity measurement because of sharply changing temperature.Advanced temperature measuring circuit of high precision and the constant current source is used to weaken effect of self-heating of resistance and fluctuation of the source.On respect of remote data transmission,LVDS is a good choice for the purpose of guarantee the quality of data transmitted and the transmission distance is reaching to thousand meters in the seawater.Modular programming method is also brought into this research aimed at improve the stability,reliability and maintainability of the whole measuring system.In February,2015,the trials in South China Sea demonstrate that the developed XCTD realize effective measurement at a speed of 6 knots and detection depth at 800 m.The consistency coefficient of the acquired data is greater than 0.99 and the success rate of probe launching is above 90%.