强力呢毯预缩机的结构与性能

文中介绍了强力预缩机的工艺流程,分析了强力预缩机的预缩单元、恒张力进布架、磁吸式分离梭、智能精确控温系统、液压自动精密叠布机及触摸式人机界面操作控制系统的作用及特点.织物经强力呢毯预缩机整理后,缩水率可控制在3%左右.     

针织物汽蒸式预缩机的设计原理

服装材料在加工制作过程中，经过织造、精炼、染色、整理等各种理化处理，由于在各道工序中所受的强烈的机械张力，导致织物内部存在着不同的应力和其它病疵，这种情况若在制作服装前不加以消除，将会不同程度地影响服装产品的形态稳定性、穿着性能等。预缩整理正是消除和纠正这种影响的一种必要的工序，预缩机是具有对织物预缩整理功能的机械。预缩机的种类很多，通常有机械式的预缩机（如橡胶毯式、呢毯式、挤缩式等）；汽蒸式预缩机；超声波水汽雾化预缩机以及冷冻蒸发预缩机等。前一种预缩机（机械式）使用比较多，后两种预缩机由于结构…     

橡毯式防缩机的预缩机理及缩率控制的探讨

本文对橡毯机预缩织物的作用原理作了较全面的论述,探讨了长期以来在这方而的一些模糊认识,为更好地掌握使用该类设备,推进我国棉织物的防缩整理技术,改进和设计新型橡毯预缩机提供了依据。     

96型预缩整理机的设计实践

一、概述织物在织造及染整加工过程中聚集了较大的内应力。未经预缩整理的织物做成的服装 ,经过洗涤 ,会产生一定程度的收缩、变形。预缩机就是采用机械物理方法使织物径向有回缩的机会 ,以恢复纱线的平衡弯曲状态 ,从而提高织物品级。国产预缩机经过二十多年的不断改进、提高 ,许多机械结构已接近或达到国际先进水平 ,机器的性能也基本满足国内印染企业的使用要求。但由于缺乏实验手段 ,科技开发能力不强 ,制约了预缩机水平的进一步提高 ,特别是在电气拖动 ,同步调速性能和工艺参数自动监控方面同国外先进预缩机的差距更大 ,目前国外预缩机…     

意大利Sperotto Rimar预缩机预缩率的检测

分析了意大利ＳｐｅｒｏｔｔｏＲｉｍａｒ预缩机预缩率数字显示仪的电路结构。该显示仪系采用电传感装置,通过对预缩机前后进出织物长度的测量,将长度信号转换为电信号,由数学集成电路对信号进行处理,最终以数字的形式显示预缩率。     

LMA452型预缩机在线监控系统应用分析

郑州纺机研制生产的LMA452型预缩机实现了对影响织物预缩率稳定性的相关工艺参数如温度、湿度、张力等进行在线监控,提高了织物预缩率稳定性,并提高了机器的综合性能和综合效益。     

针织物的热压预缩

描述了热压预缩机的应用范围和作用.很久以来,热压预缩就已经成为平幅和筒状针织物常规的整理工艺.这个最后的整理步骤再一次降低剩余缩水率并且改善了手感,增加了织物体积.讨论了热压预缩机的最佳张力控制、稳定性和可重复性问题.     

筒状针织物预缩机的机电性能与生产实践

文中系统介绍了圆筒针织物预缩机的机械、电气性能,详细说明了预缩机的工作原理和整台设备的生产工艺全流程,并对进布、超喂、汽蒸、预缩、温控、操作等不同阶段的作用和特点作了分析和介绍。     

橡毯预缩机预缩率软测量模型

针对染整后整理预缩工序,由于橡毯预缩机预缩效果的影响因素多而复杂,难以实现预缩率的在线预测和预缩工艺的精确定量设计问题,采用机理建模的方法,分析橡毯预缩机橡胶毯的变形机理,建立了预缩率与对其影响最大的因素挤压力之间的软测量模型。实例结果表明：根据所建立软测量模型计算出的预缩率与实测值的相对误差均在8%以内,平均绝对百分比误差为5.1041%,该软测量模型是可行有效的,对预缩率在线预测和预缩工艺的精确定量设计具有指导意义。     

牛仔布预缩设备的开发探讨

本文就牛仔布预缩设备的流程设计采用积木化原则以及预缩机开发中的几个关键技术问题进行了探讨，其目的就是要使设备的开发与市场需求和牛仔产品的发展相适应。     

Factors affecting days of discarded milk due to clinical mastitis and subsequent cost of discarded milk

Records of clinical mastitis for 6.5 yr from one Florida dairy with 1050 to 1350 cows milking per month were used to predict duration of occurrence of clinical mastitis and to estimate dollar value of discarded milk per lactation with occurrences of clinical mastitis. Only 6.1% of lactations accrued more than 28 d of discarded milk and were responsible for 52.7% of days of discarded milk. Accurate maintenance of herd mastitis records enables calculation of actual days of milk available for sale and provides a useful tool for culling and treating decisions. Duration of each occurrence of clinical mastitis was modeled by fixed effects of breed, season of occurrence, current lactation history of mastitis, number of quarters with clinical signs, and average maximum temperature-humidity index for the 2 d prior to the occurrence (to second order). These effects explained 1.8% of observed variation in duration of occurrence. Random effects of cow explained 5 to 6% of variation. Prediction of duration of occurrence had a mean value of 6.6 d. When economic status of individual animals is evaluated, comparison of days of milk production available for sale is preferable to total days of milk production. Estimated average cost of discarded milk for parities 1, 2, 3, 4, and 5 ranged from $29.73 to 223.98 per lactation.     

Influence of the manner of excitation of a machining system on the stability of the process of periodic circular cutting of wood tissue

The article deals with dynamic analysis of the influence of the manner of excitation of a machining system on the stability of the process of periodic circular cutting of wood tissue at an invariable frequency of cutting, taking into account dynamic properties of the machining system. For stability analysis we used a dynamic model developed for this purpose (Bu?ar and Kopa? 1996). The manner of excitation of the machining system has been defined by the radial immersion of the tool and the workpiece, taking into consideration, in modelling the process of cutting, both internal and external modulation of the cutting or exciting force. The internal modulation is the result of the effect of the properties of the machined material which are given by specific cutting pressurek _s, while the external modulation is the consequence of the varying material flux which is affected by relative displacements between the workpiece and the tool. Relative displacements, which are the result of the manner of excitation and dynamic properties of the machining system, are also the cause of self-excitation occurence. The results of analyses point to it that the manner of excitation of a machining system with known dynamic properties is of the essence for the stability of the process of periodic circular cutting of wood tissue.     

番茄中番茄红素含量无损检测的研究

实验通过苏丹Ⅰ色素标准溶液，以及番茄样品的测定，寻找扫描仪的R、G、B、H2、Ⅰ与色差计中的X、Y、Z、H1、L值及色素含量之间的相关性。实验结果显示：色差仪的X，Y，Z值和扫描仪的R，C-，B值相关性均达到极显著水平。对番茄样品的测定表明，H。和H：值的相关性达到极显著水平。色差计测定的X，Y，H-和L值与番茄样品的番茄红素含量的相关性均达到极显著水平，其相关系数分别为-0．9382,-0．9763,-0．9174，-0．9653。扫描仪的H2值与番茄样品的番茄红素含量相关性达到极显著水平，相关系数R为-0．9475。显然色差计的Y值比扫描仪的Hz值与番茄样品的番茄红素含量相关性更好。可以利用色差仪的Y和L值，以及扫描仪的H2值计算番茄样品的番茄红素含量。     

8种杀菌剂在河北番茄和黄瓜中残留分析及其膳食暴露评估

目的评估河北省番茄和黄瓜中杀菌剂农药的残留状况及居民的杀菌剂膳食摄入风险。方法基于2017年河北省11个地市番茄和黄瓜2种蔬菜的农药残留抽检数据,并根据我国不同人群的摄入量和体重数据,运用EXCEL软件,以%ADI值和%ARf D值评估番茄和黄瓜的慢性和急性膳食暴露风险。结果 108份番茄和108份黄瓜的残留分析表明,61.1%的番茄、77.8%的黄瓜中含有杀菌剂残留,其中44.4%的番茄和61.1%的黄瓜有多种杀菌剂残留。慢性膳食暴露评估结果显示:8种杀菌剂中,风险大小顺序为腐霉利吡唑醚菌酯肟菌酯多菌灵甲基硫菌灵烯酰吗啉甲霜灵嘧菌酯;不同人群的风险程度依次为2~10岁11~17岁18~59岁60岁。急性膳食暴露评估结果显示:4种杀菌剂中,番茄的腐霉利和吡唑醚菌酯膳食摄入风险远高于烯酰吗啉和多菌灵,黄瓜的腐霉利膳食摄入风险远高于烯酰吗啉、多菌灵和吡唑醚菌酯;同一农药,不同年龄组人群之间,随着年龄的增加,农药急性膳食摄入风险呈下降趋势。结论河北省番茄和黄瓜中杀菌剂残留对居民不同人群杀菌剂残留的膳食摄入风险较低,各人群中可能存在的健康风险均在可接受范围。2~10岁儿童年龄组急性膳食摄入风险明显高于其他年龄组人群,需予以关注。     

Theoretical Study of the Depolymerization of Starch under the Combined Action of Protons and Gamma Radiation

A theoretical study of the depolymerization of starch under the combined action of protons and gamma radiation is proposed. It allows prediction of the variations of the average degree of polymerization and the mass of water-soluble products of the sample as a function of the parameters of the treatment and the characteristics of the starch; the main interest of this combined treatment is to allow independent variations of these two values.     

基于布面毛羽特征参数测试的织物抗起球性客观评价

为探讨基于布面毛羽特征参数变化的织物抗起球性能客观评价的可行性,利用织物单面压缩测试装置对不同起毛、起球次数机织物试样的布面毛羽特征指标进行了测试与分析,并对毛球数量和平均毛球质量进行了计算和比较分析,提出了客观评价织物起球性能的方法。研究表明：织物起毛后再起球,对于不同的织物,毛球数量和毛球平均质量随起球次数的变化各不相同;布面毛羽各特征指标随着起球次数的变化趋势也不尽相同,除毛羽长度指标因毛羽纠缠成球而减小外,其它指标因受毛球压缩性质等多因素影响,无一致规律可循;织物的起球性能可用起球处理前后布面毛羽长度指标的变化率进行客观表征,毛羽长度变化率越大,表明织物越容易起球。     

Influence du protocole opératoire sur les caractéristiques d'une émulsion L/H réalisée avec des surfactifs polymériques non ioniques

The mode of operation has an effect on the properties of emulsions. We have studied the influence of the method of preparation (temperature, stirring rate, time of phase introduction and method of cooling) on the rheological properties of an oil in water emulsion. The importance of factors is classified with the help of two-level full and fractional factorial designs. The most significant factor is the mode of cooling, a progressive cooling produces an increase of viscosity and the influence of the other studied factors is insignificant. Sudden cooling entails a lowering of the viscosity and a diminution of the stability, and shows the influence of the rate of mixing and the temperature of manufacture.     

Hygienic estimation a state of nutrition of infant and preschool children age of city of Murmansk

The present research was directed on study of an actual meal and status of nutrition of children in the age of from birth till 5 years living in Murmansk (region of Far North). 998 children were surveyed. At an estimation of an actual meal of children the data about breast feeding are received, the basic nutrients misbalance of structure of diets of children are established, and their reasons are analyzed. On the basis of the received data the regional recommendations for organization of a healthy meal in children's preschool establishments and program of hygienic training of the parents to skills of a balanced diet of children of early and junior age were developed.     

棉条的分形特征与均匀度

采用分形几何的方法,计算实时采集的棉条厚度信号分维数,研究表明棉条厚度信号数据的盒维数与棉条不匀率单调正相关,一定窗口宽度的分维数均值与不匀率正相关,棉条厚度的时间序列数据的分维数序列与不匀率序列高度同步,因此可以用分维数评价棉条均匀度。     

Application of food supplement, of a duilder-rose for prevention of stressful disturbance of physiological and biochemical characteristics of erythrocytes

In the article results of researches of influence of food supplement allocated of a guelder-rose (Viburnum sargentii Koehne) on structural and physiological characteristics of erythrocytes are presented to blood of the doctors-surgeons who are exposed during of the working day to complex stressful influence (psychologic-emotional, chemical, intensity of labour process, etc). It is shown that preventive application a polyphenolic complex from a guelder-rose promoted restoration of average volume and diameter of erythrocytes, normalization of a parity of quantitative structure of neutral lipids and phospholipids, to preservation of permeability of membranes. The food supplement allocated of a guelder-rose can be used in a treatment and prophylactic feed.