Towel 形域到方形域的全局同胚网格生成法

给出了一种把任意维Ｔｏｗｅｌ形域映到方形过渡域的映射；给出了此映射是全局同胚的充分性条件和对应此映射的数值网格生成的迭代方法．对于Ｔｏｗｅｌ形域的一种较特殊情况，本文给出了相应的结论．最后，还给出数值网格生成的例子．

Selection and Cultivation of a New Towel Gourd——‘Taisi No.2'

Selection and cultivation process of Taisi No.2 was introduced and a comparative test was conducted in 2008-2009.During 2010-2011,multiple-site tests were made,with production test and demonstration.The results indicated that yield of Taisi No.2 was higher compared with Wenling Baisigua.Furthermore,Taisi No.2 performed better in quality,commercial value,disease-tolerance and resistance.It is important to prepare work on cultivating strong seedlings,transplanting,strengthening fertilizer and water management,leading vine growth,timely harvest and disease prevention.

Towel型域到方形计算域全局同胚网格的数值生成方法

对任意维Towel型物理域 D到方形计算域Dc 的全局同胚映射数值实现方法进行研究 ,给出了任意维等参数正变换的数值迭代求解方法 ,并就迭代求解方法的误差进行分析 ,给出了数值网格点互不重合的一个充分性条件 .最后 ,根据该方法 ,给出了钱塘江口的二维不重叠数值网格生成算例 .

A New Towel Gourd F_1 hybrid——‘Taisi NO.3'

＇Taisi N0.3＇ is an early mid-maturing towel gourd F1 hybrid developed by crossing Ps17-6-5-2-10-8 as female parent and Ps39-3-8-4-6-5 as male parent. The period from sowing to first harvest is about 75 days in spring cropping. It grows exuberantly in early stage and better in middle and later stages; leaves are green and palmately divided; the maximum leaf＇s length and width are about 25.5 and 33.7 cm. It bears fruit at the main and lateral branch. The first female flower sets on the 7^th-8^th node, and the fruit-setting rate is 72.8%. The fruit-setting rate is high. Its fruit is long round stick shape, 47.4 cm in length, and 3.75 cm in width, with smooth and green skin covered by dark green stripes, dense flesh. The fruit tastes good, with high Vc content. It is resistant to downy mildew, moderately resistant to CMV, and highly resistant to blight. The average fruit weight is about 282.3 g with the general yield of 82 500 kg/hm2.

Preliminary Study on the Effectiveness of Different Durations of Hot Towel Application to the Back during Bed Bathing

The purpose of this study was to determine the most effective duration of hot towel application during bed bathing, based on temporal changes in skin surface temperature, towel temperature, and subjective comfort. As a secondary objective, differences in skin surface temperature and subjective comfort for hot towel application on the back and dry towel wiping alone were evaluated. For the first objective, hot towels were applied on the lower back of 20 healthy adults, for different duration (10, 15, and 20 s), with a 10-s duration found to be the most effective. For the second objective, we compared bed bathing with hot towel application to dry wiping alone, n 21 healthy adult participants. A 10-s hot towel application increased the surface temperature of the skin (+0.5℃) and provided a perceived sensation of warmth and comfort. In contrast, dry wiping significantly decreased the surface skin temperature (-0.8℃). In conclusion, hot towel application increased skin surface temperature and improved subjective warmth and comfort during bed bathing.

Ribbed towel gourd seed germination

The influence of different conditions on ribbed towel gourd seed germination was tested in this paper. Results showed that the seeds germinating energy and germination percentage were increased evidently under the treatment of dipping in normal water temperature for 4 hours and drying out for 1 hour at 30℃.

Cost analysis and comparison of plain cotton and disposable non-woven treatment towels

Objective: To choose a reasonably priced and low-cost treatment towel suitable for clinical application of hospital so as to reduce the cost of the hospital and make a reasonable use of resources through the cost analysis and comparison of the plain cotton and disposable non-woven treatment towels. Methods: The cost of the single pack plain cotton towel and disposable non-woven towel were analyzed and at the same time, 49185 packs of plain cotton towels which were the total consumption quantity of our hospital in 2017 and the same quantity of disposable non-woven towers were analyzed in the cost for comparison. Results:A single pack of disposable non-woven towel was RMB 2.50 cheaper than the plain cotton towel and the use of disposable non-woven towel can save the cost of RMB 2.50 per pack. In 2017, 49185 packs of plain cotton towel were used in total, which cost RMB 122962.50 less than the same quantity of disposable non-woven towels and using the disposable non-woven towel could save RMB 122962.50 annually. Conclusion: Compared with the plain cotton towel, the non-woven shares the advantages of none flocculation, longer storage time and better antibacterial effect as well as the material, cleaning and labor costs-saving. The cost of the disposable non-woven treatment towel is lower than that of the reusable plain cotton towel. Therefore, it is recommended to use the disposable non-woven treatment towel.

Characteristics and health risks of population exposure to phthalates via the use of face towels

The production of face towels is growing at an annual rate of about 4%in China,reaching 1.13 million tons by 2021.Phthalates(PAEs)are widely used in textiles,and face towels,as an important household textile,may expose people to PAEs via the skin,further leading to health risks.We collected new face towels and analyzed the distribution characterization of PAEs in them.The changes of PAEs were explored in a face towel use experiment and a simulated laundry experiment.Based on the use of face towels by 24 volunteers,we calculated the estimated daily intake(EDI)and comprehensively assessed the hazard quotient(HQ),hazard index(HI),and dermal cancer risk(DCR)of PAEs exposure in the population.PAEs were present in new face towels at total concentrations of<MDL–2388 ng/g,with a median of 173.2 ng/g,which was a lower contamination level compared with other textiles.PAE contents in used face towels were significantly higher than in new face towels.The concentrations of PAEs in coral velvet were significantly higher than those in cotton.Water washing removed some PAEs,while detergent washing increased the PAE content on face towels.Gender,weight,use time,and material were the main factors affecting EDI.The HQ and HIwere less than 1,which proved PAEs had no significant non-carcinogenic health risks.Among the five target PAEs studied,DEHPwas the only carcinogenic PAE andmay cause potential health risks after long-term exposure.Therefore,we should pay more attention to DEHP.

丝瓜新品种‘衡亮1号’的选育

【目的】本研究旨在介绍‘衡亮1号’丝瓜,一种经过精心培育的优良自交系品种,具有耐热、耐湿和高产特性,适合在长江流域广泛种植。【方法】通过株内定向培育和多代单株选育,从株洲白丝瓜的变异单株中获得了‘衡亮1号’丝瓜。对该品种的生长特性、产量、品质等方面进行了详细观察和评估。【结果】‘衡亮1号’丝瓜为早熟品种,单瓜重量控制在0.48~0.61kg,果实纵径为26.0~27.2cm,呈现出短棒圆筒形的优美形态。果皮白绿油亮,果肉洁白如玉。全期产量高达2781.3kg/667m^(2),口感清香,品质卓越。【结论】‘衡亮1号’丝瓜是一种具有优良特性的瓜类蔬菜品种,适合在长江流域的广大地区进行大面积种植。其高产、优质的特点将为农业生产提供有力支持,满足市场需求。

基于卷积神经网络的毛巾瑕疵检测系统设计

针对毛巾表面小尺寸瑕疵和极端纵横比的经纬向瑕疵,提出基于卷积神经网络的毛巾瑕疵图像检测方法。首先采用所构建毛巾瑕疵检测系统中的面阵工业相机进行毛巾样本图像采集,从中选取150张带有瑕疵的图像,对采集的图像进行数据扩充,并制作数据集;其次,通过融合特征金字塔网络与ResNet-50,并引入K-means聚类优化边界框宽高比,得到适用的Faster R-CNN目标检测算法;最后,用数据集进行网络训练,提取图像中的瑕疵特征,识别瑕疵目标,并对训练所得网络进行实验验证,识别检出率达到95.2%。结果表明,所提出的系统可有效实现毛巾瑕疵自动检测。

基于INPD的女性智能毛巾架创新设计研究

为了科学地识别用户需求的类型、精确地得到用户需求的优先级排序、客观地评估设计方案,从而提高用户对产品的满意度,建立一种面向女性的智能毛巾架产品开发模型。通过将KANO模型与AHP法引入INPD产品开发程序来开展一项实证研究。先依据KANO模型对用户的需求属性进行详细分类,再采用AHP法对各属性的需求权重进行评定,并根据这些需求权重的排序结果提出设计构想,建立完整性与科学性高的女性智能毛巾架用户需求框架,完成合理、人性化和具有创新性的最佳设计方案。基于KANO模型与AHP法融入INPD的产品创新设计程序,解决女性吹发过程繁琐的问题,开发出更符合女性需求的智能毛巾架产品,为同类产品的创新设计提供新的研究思路。

新型剖腹单联合腔镜袋铺巾法在食管癌三切口手术中的应用

目的:探讨设计的新型手术剖腹单及专用腔镜手术置物袋在食管癌三切口手术中的临床应用效果。方法:选取在医院行食管癌三切口手术的92例食管癌患者作为研究对象,采用随机数表法分为对照组和观察组,各46例患者。对照组采用传统剖腹单铺巾方法,观察组采用新型剖腹单联合腔镜袋铺巾方法,比较两组铺巾时间、手术敷料耗损率、手术器械滑落率及医护人员满意度。结果:观察组铺巾时间低于对照组,差异有统计学意义(P<0.05);观察组手术敷料耗损率及手术器械滑落率与对照组比较,差异无统计学意义(P>0.05);观察组医护人员满意度高于对照组,差异具有统计学意义(P<0.05)。结论:新型剖腹单联合腔镜袋铺巾方法可显著缩短手术铺巾时间,且不会增加手术敷料耗损率和器械滑落率,提高医护人员满意度,同时提高手术室工作效率,进一步提升手术室护理质量。

Bifunctional 3D n-doped porous carbon materials derived from paper towel for oxygen reduction reaction and supercapacitor

Designing and fabricating cheap and active bifunctional materials is crucial for the development of renewable energy technologies.In this article,three-dimensional nitrogen-doped porous carbon materials(NDPC-X,in which X represents the pyrolysis temperature) were fabricated by simultaneous carbonization and activation of polypyrrole-coated paper towel protected by a silica layer followed by acid etching.The material had a high specific surface area(1,123.40 m^2/g).The as-obtained NDPC-900 displayed outstanding activity as a catalyst for the oxygen reduction reaction(ORR) as well as an electrode with a high specific capacitance in a supercapacitor in an alkaline medium.The NDPC-900 catalyst for the ORR exhibited a more positive reduction peak potential of à0.068 V(vs.Hg|HgCl^2) than that of Pt/C(-0.121 V),as well as better cycling stability and stronger methanol tolerance.Moreover,the NDPC-900 had a high specific capacitance of 379.50 F/g at a current density of 1 A/g,with a retention rate of 94.5% after 10,000 cycles in 6 mol/L KOH electrolyte when used as an electrode in a supercapacitor.All these results were attributed to the effect of a large surface area,which provided electrochemically active sites.This work introduces an effective way to use biomass-derived materials for the synthesis of promising bifunctional carbon material for electrochemical energy conversion and storage devices.

GB/T 20808《纸巾》新旧标准差异分析

本文通过对2011版和2022版《纸巾》国家标准进行差异分析,从范围、分类、原材料、要求、试验方法、检验规则、标识、包装、运输和贮存等角度全面解读2022版标准的主要变化,从而助力企业、检测机构和消费者等相关方更好地理解和运用新标准。

黏胶/ES纤维热轧消毒吸附干巾表层材料的制备与性能分析

为制备兼具良好力学性能和导流性能的消毒吸附干巾表层材料,将黏胶纤维和ES纤维混合,通过热轧非织造加固工艺制备黏胶/ES纤维热轧消毒吸附干巾表层材料。通过单因素试验,探讨黏胶纤维和ES纤维混合比例及热轧温度对材料力学性能和导流性能的影响。结果显示:纤维混合比例与热轧温度均显著影响材料的力学性能与导流性能,优化的工艺参数为黏胶纤维和ES纤维质量比20/80、热轧温度135℃。采用优化工艺参数制备的热轧消毒吸附干巾表层材料,其纵横向断裂强力分别为88.16 N和36.82 N,吸液率为751%,扩散长度为18.1 cm,渗水面浸湿时间为2.25 s,上下层吸水速率分别为26.19%/s和65.61%/s,上下层液态水扩散速度分别为3.96 mm/s和6.54 mm/s,单向传递指数为962,兼具良好的力学性能和导流性能。

火灾滤毒工具的防护性能研究

为探究在特定工况下湿毛巾和过滤式消防自救呼吸器的防护性能,搭建滤毒工具防护性能测试平台,针对火灾场景中的常见燃烧物,选择硬质聚氨酯、软质聚氨酯、纸张、木材、棉布、PVC、锂电池7种材料,分别测试其燃烧产物中的主要气体成分,分析普通毛巾对气体、烟尘和高温的防护性能。在特定工况下的试验结果表明:湿毛巾对7种燃烧物产生的PM10颗粒具有一定的过滤效果,平均过滤效率为25.57%;对高温烟气具有降温作用,平均降幅为29.1℃;对HCN和CO未见明显过滤效果,对C2H4O的平均过滤效率约为28%,对SO_(2)的平均过滤效率约为75%,对HCl的平均过滤效率约为84%;对比测试过滤式消防自救呼吸器对CO和烟尘的防护能力,其性能远高于湿毛巾,并具有更低的呼吸阻力。

大杯蕈菇渣复配基质在丝瓜育苗上的应用

为探讨大杯蕈菇渣作为基质用于丝瓜育苗的可行性,分析不同大杯蕈菇渣复配基质对丝瓜幼苗生长的影响。以农福丝瓜805为试材,将大杯蕈菇渣、珍珠岩、草炭、蛭石、椰糠5种基质按照不同配比配制成无土栽培基质,研究7种不同基质配方的理化性质及其对丝瓜生长和光合色素的影响。结果表明:(1)除全大杯蕈菇渣配方生长指标值低于对照CK_(1),其余配方生长指标值均高于对照,说明将大杯蕈菇渣应用于丝瓜育苗是完全可行的,但不宜采用全大杯蕈菇渣基质进行栽培。(2)在持水孔隙度上,配方CK_(2)偏低,略低于理想基质要求;在EC值上,配方CK_(2)、T_(4)、T_(5)偏高,不符合理想基质要求;在pH值上,配方CK_(2)和T_(5)处理偏低,配方T_(1)和T_(2)偏高,均不符合理想基质要求,仅配方CK_(1)和T_(3)满足理想基质的要求。(3)配方T_(3)能够促进株高、茎粗和下胚轴长的生长,提高地上部鲜重、地上部干重和地下部干重,其壮苗指数最大,促进丝瓜生长发育的效果最好;叶绿素a含量和叶绿素总含量,处理7和14 d时均以配方T_(1)和配方T_(3)最高;配方T_(2)有利于促进叶绿素b含量的增加;类胡萝卜素含量,处理7和14 d时分别以配方CK_(1)和T_(3)最高。(4)经过筛选,大杯蕈菇渣∶珍珠岩∶蛭石=3∶1∶1为丝瓜育苗的最佳复配基质配方,大杯蕈菇渣最佳使用比例为60%。该研究结果可为应用大杯蕈菇渣进行丝瓜育苗提供参考依据,并解决大杯蕈菇渣对环境造成污染的问题。

低剂量纸巾添加对餐厨垃圾和厨余垃圾共消化的影响

随着垃圾分类的开展,湿垃圾的分出量不断增大,其主要包括家庭厨余垃圾和餐厨垃圾,常采用厌氧消化工艺进行处理。垃圾分选过程中可能会有部分纸巾混入湿垃圾,并一同进入厌氧消化系统。本研究探究纸巾混入(5%,以TS计)对厨余垃圾和餐厨垃圾后续单独和共同厌氧消化的影响,结果表明:纸巾的添加使厨余垃圾组和共消化组累积沼气产量分别提高了5.8%和4.5%,同时促进了NH_(4)^(+)-N浓度的升高和pH的恢复,并引起纤维素降解菌属的相对丰度增加,从而有利于纸巾中纤维素的降解。因此部分纸巾的混入可促进湿垃圾厌氧产沼性能,因而在垃圾分类时并不需要完全剔除纸巾。

储液高度对氧化风机塔结构抗震性能影响的研究

电力设施工程当遭受地震灾害时发生破坏,将严重影响灾区人民生产生活和应急救援工作的开展。氧化风机塔(Absorber Feed Tank,简称“AFT”)是服务于火力发电清洁脱硫工艺环节中的一种钢筋混凝土结构支撑钢罐的复合结构,其上部钢罐日常存储有大量液体。考虑液体的减震作用,建立AFT塔的有限元模型,以持液体高度10~20m作为自变量,进行模态分析,根据现场监测结果验证了模型的可靠性,并输入地震波进行动力时程分析,结果表明:AFT塔水平位移响应随着浆液高度的增加而变化,而这种变化趋势随所遇地震加速度幅值不同而表现不同。AFT塔下部的水平加速度响应峰值随浆液高度增加而增大,并且随着输入的地震加速度幅值增大,峰值位置从混凝土框架的顶板开始逐步下移。综合位移和加速度响应结果,表明AFT塔在持液18m时具有较好的抗震性能。

棉毛巾在UVB照射后的挥发性气体成分分析

为分析棉毛巾在UVB-313紫外光源照射后的气体成分,采用顶空固相微萃取-气相色谱-质谱联用法(HS-SPME-GCMS)对棉毛巾的挥发性气体进行萃取和检测。通过NIST谱库检索对气体定性,峰面积归一化法确定气体的相对百分含量,结合相对气味活度值法(ROAV)确定某成分的气味特征和总体贡献。结果表明:不同辐照度及辐照时间处理后的棉毛巾共鉴定出6种挥发性气体物质,包括醛类2种,醇类1种,烷烃类3种,且壬醛、癸醛和十八烷是UVB照射后棉毛巾的主体气味物质,最后构建了辐照度和辐照时间与壬醛相对百分含量的多元线性回归方程。研究结果可为芳香医疗卫生及家用棉制纺织品的开发提供参考。