基于自适应薄板样条全变分的肺CT/PET图像配准

全变分正则项虽然能够在具有滑移运动的肺等胸腹部器官图像配准时校正边界不连续位移场，但仍然无法保留图像的局部特征，损失配准精度。针对肺图像CT单模配准和CT/PET双模配准，通过像素点空间位置权重将薄板样条能量算子与全变分算子进行空间加权建立自适应薄板样条全变分正则项。然后，将正则项与CRMI相似性测度以及L-BFGS优化方法结合建立非刚性配准算法。通过DIR-Lab 4D-CT公共数据集和CT/PET临床数据集上的实验结果表明，提出的方法能够在保证边界不连续运动的同时保证图像内部的平滑性，具有更高的配准精度。     

Kinetics of combined noncatalytic and catalytic hydrolysis of jute fiber under ultrasonic–far infrared energy synergy

Hydrolysis of pretreated waste jute fiber was intensified for maximizing reducing sugar (RS) yield deploying a novel reactor equipped with ultrasonic–far-infrared-waves (US–FIRW). At optimal 70°C temperature, 2.5 wt% Amberlyst-15 catalyst concentration, 15 min hydrolysis time and 10 (wt/wt) water loading; US–FIRW rendered significantly greater RS yield (74.82 mol%) compared to other reactors provided with far-infrared-wave (69.63 mol%), ultrasonication (50.34 mol%), and conventional thermal system (48.16 mol%). Kinetic models were developed considering noncatalytic-pseudo-homogenous (NCPH) in addition to the combined catalytic-pseudo-homogeneous (CPH) and catalytic heterogeneous (CHE) hydrolysis pathways. The results revealed that pseudo-homogenous–heterogeneous Eley–Rideal (PHHER) model could represent the hydrolysis kinetics most accurately. Remarkably, the lowest activation energy [16.75 kJ mol⁻¹ (NCPH), 13.82 kJ mol⁻¹ (CPH), 40.01 kJ mol⁻¹ (CHE)] required in US–FIRW evidently established its greater energy-efficiency among investigated reactors. The novel reactor and the simulated kinetic models can be applicable to other lignocellulosic biomass conversion for sustainable biorefinery.     

饭店低碳评价指标及碳排放等级划分

节能减排作为一项基本国策已深入人心。然而饭店节能减排工作,目前仍停留在绿色饭店的“浅绿色”概念,与时代发展不相符。启动饭店低碳化水平的评价和碳排放等级划分,不仅可推动饭店行业的节能减排,而且可广泛影响人们在生活中低碳行为的培养。通过理论与实践,提出饭店低碳化评价指标体系和饭店碳排放等级划分的具体标准。     

Synergistic antidiabetic activity of ZnO nanoparticles encompassed by Urtica dioica extract

The present study aimed at producing ZnO nanoparticles using the leaf extract of nettle (Urtica dioica) as a medicinally valuable plant to maximize the antidiabetic property of ZnO while excluding the chemical pollution from the synthesis process. The properties of the ZnO-extract sample were uncovered by various techniques and compared to that produced without the extract (ZnO). The results of the surface, optical, and thermal studies disclosed the presence of the extract biomolecules over the ZnO-extract sample and was further confirmed by GC–MS analysis. The ZnO-extract was intraperitoneally injected to alloxan-induced diabetic rats and the effects on the serum levels of fasting blood glucose, insulin, high-density lipoprotein cholesterol, total cholesterol, and total triglyceride were assessed. The obtained results were then compared with the effects of ZnO, nettle leaf extract, and insulin on the same factors. Among all the examined treatments, the best antidiabetic performance was obtained in the rats treated by ZnO-U. dioica extract mainly owing to the great synergistic interaction between its constituents.     

Role of the backward-facing steps at two struts on mixing and combustion characteristics in a typical strut-based scramjet with hydrogen fuel

Scramjet is one of the most promising propulsion systems for the new generation supersonic/hypersonic air-breathing flight vehicles. To achieve sufficiently high combustion efficiency and relatively low total pressure loss, developing a new strut is an attractive approach. In this study, we focus on the backward-facing steps and investigate the geometry parameters of the backward-facing steps of the two struts. In this work, Reynolds-averaged Navier-Stokes equation coupled with the one-step H₂-air reaction finite-rate/eddy-dissipation model is adopted to simulate all the two-strut cases, then this code is validated by the available experimental data. Next, we investigate the effects of different lengths and heights of the backward-facing steps on the two-strut based scramjet performance. For cold flow, enhancing the length of the backward-facing step can promote partly the mixing process with few extra total pressure losses. Further, the mixing process is weakened with increasing the height of the backward-facing steps to certain content, meanwhile, the total pressure loss is increased. In terms of reacting flow, increasing the length enhances the combustion efficiency, whereas the total pressure loss relatively decreases and thereafter increases. Enhancing the height of the backward-facing steps makes the combustion efficiency relatively decreases and thereafter increases, moreover, the total pressure loss increases as a result.     

蔗糖高压催化氢化裂解制甘油

概述了我国甘油工业的发展状况及世界发展趋势。介绍了蔗糖催化氢解法制备甘油的工艺条件和影响氢解反应的因素。指出根据我国实际情况开展蔗糖氢解法制备甘油的研究，将为我国甘油工业的发展探索一条新路。     

TALOSURF界面活性剂在糖厂低纯度物料中的应用研究

在糖厂生产过程中 ,当糖浆的纯度低于 80 AP时 ,糖膏粘度增加 ,煮制、分蜜困难 ,影响生产的均衡性 ,生产能力下降 ,产品质量无法保证。这个问题在糖厂榨季前后甘蔗品质不高及甘蔗欠新鲜时都发生 ,为了解决这一棘手问题 ,我们使用 TAL OSURF界面活性剂进行了全面的应用研究。研究表明 ,TAL OSURF界面活性剂对处理低纯度物料有着明显的效果 ,提糖率及产品质量均有所提高。