复烤后烟叶分切方式对烘后烟丝品质的影响

目的:研究复烤加工后烟叶分切方式对烘后烟丝质量指标的影响。方法:取某规格的配方烟叶平均分成4份,经不同的分切处理后制丝,取烘后烟丝测定烟丝结构、填充值、石油醚提取物含量、香味成分总量。为消除不同质量指标之间的关联性,利用主成分分析对烘后烟丝质量指标进行降维处理,最后对不同分切方式下的烘后烟丝进行感官质量评价。结果:①不同的烟叶分切方式下烘后烟丝结构、填充值、石油醚提取物含量、香味成分总量存在差异;②主成分1可反映短烟丝(<2.8 mm)、填充值、石油醚提取物含量、香味成分总量的信息,主成分3可以反映整丝(2.8~4.0 mm)的信息,主成分分析结果表明:C工艺处理条件(筛分出2/3大于42 mm的超大烟片进行分切处理)下主成分1结果最优,明显优于其他工艺处理条件,D工艺处理条件(筛分出大于42 mm的超大片烟叶进行分切处理)下主成分3的结果最优,C工艺处理次之,明显优于其他两个工艺处理条件;③感官评价的结果表明:A(对照样,不做分切处理)与C工艺处理条件下烘后烟丝香气质、香气量、口感表现较好,明显优于其他两个工艺处理条件。结论:不同的烟叶分切方式可以改变烘后烟丝的品质,因此可以通过烟叶分切来控制烘后烟丝的结构,进而减少烟叶原料的浪费,提升卷烟品质。

热平整分切机组自动化控制系统

详细介绍热平整分切机组工艺控制流程和机组自动控制功能。

分切工艺对竹浆粕质量的影响

以8种竹材为原料制备人造纤维用竹浆粕,探讨不同分切方式和分切长度对竹浆粕质量的影响。试验结果表明,试验条件下,斜切方式比正切方式制得的竹浆粕甲种纤维素含量高;几种分切长度中,20~40mm分切长度制得的竹浆粕甲种纤维素含量高,综合质量最优。

A novel two-stage Lagrangian decomposition approach for refinery production scheduling with operational transitions in mode switching

To address large scale industrial processes,a novel Lagrangian scheme is proposed to decompose a refinery scheduling problem with operational transitions in mode switching into a production subproblem and a blending and delivery subproblem.To accelerate the convergence of Lagrange multipliers,some auxiliary constraints are added in the blending and delivery subproblem.A speed-up scheme is presented to increase the efficiency for solving the production subproblem.An initialization scheme of Lagrange multipliers and a heuristic algorithm to find feasible solutions are designed.Computational results on three cases with different lengths of time horizons and different numbers of orders show that the proposed Lagrangian scheme is effective and efficient.

On the Geometrical Meaning of the Dynamic Equations in Analytical Mechanics

In this paper,the modern geometrical structure of analytical mechanics,the exterior differential forms and the geometrical meaning of dynamic equations are briefly discussed.