基于RFID技术的辣椒制品质量管理系统设计

针对辣椒制品企业对生产温度的要求,利用RFID技术的先进优势,通过对生产温度测控,设计了基于RFID技术的辣椒制品的质量管理信息系统,对企业的生产过程进行实时监控;实现信息化管理;提高企业生产效率。     

热塑性塑料注塑件凹陷和缩痕影响因素分析

注塑制品的表面缺陷往往反映了其内在质量的问题,其中凹陷和缩痕是时常发生的问题,对此,本文从原材料、塑件结构、模具和成型工艺等四个方面对注塑制品凹陷或缩痕问题产生的原因进行了分析,并结合生产实际提出了相应的解决措施,有利于提高制品质量和生产效率。     

泰克公司占领日益增长的大幅面彩色打印机市场

泰克公司占领日益增长的大幅面彩色打印机市场Ｐｈａｓｅｒ６００型打印机将荣获在奖的固体喷蜡技术运用于大幅面打印市场工作组彩色打印的领导者——泰克公司宣布，该公司生产的Ｐｈａｓｅｒ６００，一种新型的固体喷蜡打印机，可以在幅面达３６英寸的任何种类的纸张上打...     

GS1全球统一标识系统助力茶叶制品质量安全跟踪与追溯

近年来,我国茶叶制品质量安全事件频繁发生,严重影响了我国茶叶制品的形象和声誉.在茶叶制品质量安全问题日益受到社会各界人士高度重视,以及日本和欧盟等主要茶叶进口国家和地区不断提高茶叶制品质量安全检测标准的形势下,如何切实有效的保障我国茶叶制品质量安全,提升茶叶制品质量水平,维护广大消费者利益,促进茶叶生产行业健康发展成为迫切需要解决的课题.     

力控组态软件在炼油厂制蜡氨压缩机自动控制中的应用

炼油厂制蜡装置是利用炼油分解所剩下的蜡油原料来制造成品蜡的。在制蜡装置中,氨压机的平稳操作对保证全装置正常生产有着举足轻重的作用。以大庆油田化工总厂炼油厂制蜡装置氨压机的控制系统为例,来说明氨压机的控制方案和力控组态软件的应用方法。1工艺过程与控制方案设计1.1工艺过程氨压机使用的是蜗杆式压缩机,它由一个电动机通过一个挠性连轴器来驱动。冷却剂(氨)经压缩机压缩后进入分离器内,油位于分离器的较低部分,冷却剂通过过滤器进入到蒸汽凝结器中。凝结后的冷却剂经过压力调节器流到收集器中。循环器中的液位控制器启动电磁阀,…     

浅谈手工制品在当代社会生活中的重要性及生存模式

近年来,手工制品所具有的自然属性和美学意义重新引起了人们的重视。手的习性、本能、行动意识和时间、空间、材料、肌理有着密切的关联性。这赋予了手工制品区别于工业品的原真和雅趣。它在生产规模、劳作时间、生产速度及成本上与工业产品迥然相异。然而,随着时代与市场的多元化发展,手工制品以新的符号和形态,出现在社会主流市场的消费结构中。文章分别从美学价值以及市场消费形态对手工制品进行分析、研究。     

湖北中烟信息化服务负载均衡保障

湖北中烟工业公司组建于2003年8月,隶属国家烟草专卖局（中国烟草总公司）。公司组建后,负责统一管理湖北卷烟工业企业及多元化生产经营企业,下设武汉、襄樊、三峡、红安、广水等烟厂。2007年11月,正式更名为湖北中烟工业有限责任公司,经营范围涵盖烟草制品的生产、销售,烟用物资、烟机进口和卷烟出口业务,与烟草制品生产销售相关的其他生产经营、多元化经营、资产经营等。     

蜡雕工艺在首饰设计中的应用与研究

文章以目前社会上产品设计存在的一个现象为着眼点,简明扼要的讲述这种情况存在的原因以及解决的基本方法,从而引出蜡雕工艺。文章主要研究蜡雕工艺中蜡的性质与特征,并根据蜡的性质和特征进行蜡雕工艺的制作研究,以及在首饰设计中如何应用。     

神经网络专家系统在滤机控制中的研究

提出一种滤机控制中除蜡过程再生信号的确定方法。该方法采用神经网络专家系统，并经过工厂提供的实测数据进行训练，仿真结果较好，可以用于生产实际。     

微型机在炭素制品生产中的应用

一、前言石墨化是炭素制品生产中重要工序之一。目前,国内外石墨化的设备主要是艾奇逊式电阻炉,其工作原理是以制品与电阻料一起组成炉芯电阻,通过电流,以焦耳热完成制品石墨化过程。根据工艺要求,在特定的送电曲线下,功率需不断增加,其供电操作比较复杂。     

基于AERF模型的油井结蜡预测

油井结蜡是一种在开发以及开采油田时对油井正常产出造成了负面影响的现象,该现象会引起油流通道堵塞,导致油井开采过程中出油量降低.对油井结蜡状况做出智能预警,完成油井设备提前修复,对油田提高产能效率、降低维护成本及智能化管理有非常关键的价值.为了解决油井正常数据和结蜡数据严重不平衡问题,本文引入了自适应合成抽样法(ADASYN)和最近邻规则欠抽样法(ENN)两种非均衡样本处理方法,分别对类别为结蜡的样本和非结蜡的样本进行处理,最终使用随机森林算法对新构成的数据集训练,构造出AERF智能模型来预测油井结蜡.实验结果表明,提出的AERF模型在油井的结蜡数据集中预测效果更佳,明显地提高了预测精度.     

A Bidirectional Deposition Model of Wax Crayons

We present a physically inspired model of wax crayons, which synthesizes drawings from collections of user‐specified strokes. Paper is represented by a height‐field texture, and a crayon is modeled with a 2D mask that evolves as it interacts with the paper. The amount of wax deposition is computed based on the crayon contact profile, contact force and friction. Previously deposited wax is smeared by crayon action, based on wax softness and contact information. Deposited wax can also be carved from the paper by the crayon and redeposited at another location. The distributed wax is rendered using a simplified Kubelka–Monk model, which approximates light transmission and scattering effects.     

浅谈扎染与蜡染图案艺术

手工印染是一种非常传统的工艺美术种类,有着非常悠久的历史渊源和文化内涵,手工印染包括扎染和蜡染,扎染又称绞缬,扎染是中国一种古老的纺织品染色工艺,也是我国传统的手工染色技术之一,蜡染,古称蜡,与绞缬(扎染)、夹缬(镂空印花)并称为我国古代三大印花技艺。扎染和蜡染图案艺术是艺术设计当中不可缺少的艺术门类。     

A Latchable Phase-Change Microvalve With Integrated Heaters

This paper presents a latchable phase-change microvalve with integrated microheaters, which is suitable for lab-on-a-chip systems where minimal energy consumption is desired. The microvalve exploits low-melting-point paraffin wax, whose solid–liquid phase changes allow switching of fluid flow through deformable microchannel ceiling. Switching is initiated by melting of paraffin through an integrated microheater, with an additional pneumatic pressure used for the open-to-close switching. The valve consumes energy only during initiation of valve switching. When paraffin solidifies, the switched state is maintained passively. The microvalve was fabricated from polydimethylsiloxane through multilayer soft lithography techniques. Experiments show that the valve can switch flow within 4–8 s due to the small thermal mass and localized melting of paraffin wax; when closed, the valve can passively withstand an inlet pressure over 50 kPa without leakage. Time response of the valve can be further improved with improved heater and wax chamber designs, while the latching ability can be improved by optimizing the wax chamber/membrane design. Compared to existing latchable phase-change valves, the microvalve has no risk of cross-contamination. In addition, the improved sealing offered by the compliant membrane makes the valve robust and flexible in operation, allowing large ranges of initiation pressure from various actuation schemes. $hfill$[2008-0303]      

Design and pressure analysis for bulk-micromachined electrothermal hydraulic microactuators using a PCM

Paraffin wax exhibits a volumetric expansion of ∼15%, at around its melting point. By exploiting this phenomenon, high performance bulk-machined electrothermal hydraulic microactuators have been demonstrated. The microactuators have been integrated into microfluidic valves, microgrippers and micropipettes. The paraffin wax is confined within a bulk-micromachined silicon container. This container is sealed using an elastic diaphragm of PDMS, while it is heated via gold microheaters located on an underlying glass substrate. All the layers used to make up the containers are bonded together using a unique combination of overglaze paste and PDMS. The hydraulic pressure of expanding paraffin wax was determined using the deflection theory of a circular plate. For the first time, the hydraulic pressure of expanding paraffin wax was calculated using the theory of large deflections for a circular plate and measured data from the type-A microgripper. This theory has been exploited for the deflection analysis of micromachined thin elastic diaphragms. In order to calculate the hydraulic pressure, the theory of large deflections of a circular plate is calculated using the measured actuation height, the PDMS diaphragm dimension of the microgripper (type-A) and mechanical properties of the PDMS. The hydraulic pressure was calculated to be approximately 0.12 MPa. All the devices were successfully demonstrated and operated at either 10 or 15 V.     

A Polymeric Paraffin Microactuator

Paraffin wax is a promising material in microactuators not only because of its ability of producing large displacements and high forces at the same time but also because of the variety of manufacturing techniques available. In this paper, a simple actuator based on paraffin wax as the active material is fabricated and tested. Ultraviolet-curable epoxy is used in a technique combining simultaneous moulding and liquid-phase photopolymerization in a single-process step to build the stiff part of the actuator body. A heater is integrated in the paraffin reservoir, and a polyimide tape is used as the deflecting membrane. Thermomechanical analysis of the paraffin wax shows that it exhibits a volume expansion of 10%, including phase transitions and linear expansion. As for the actuator, a stroke of 90 mum is obtained for the unloaded device, whereas 37 mum is recorded with a 0.5-N contact load at a driving voltage of 0.71 V and a frequency of 1/32 Hz. The actuator can be used in microsystems, where both large strokes and forces are needed. The low-cost materials and low driving voltage also makes it suitable for disposable systems.     

基于无纺布检测浓度的微流控装置

目前微流控器件主要由玻璃或聚合物材料制成,而无纺布具有成本低、易加工、一次性等优点,为微流体材料提供了一种新的选择。本研究把蜡印染在无纺布上制备微流控器件,可以形成有效的蜡印通道,控制流体在内部通道扩散和流动。并把不同浓度的红色水溶性染料滴到通道中,利用图像处理算法检测其灰度值做浓度比对,发现在特定浓度下,灰度值呈现近似线性规律,可将其推广到生物医学现场检测等领域。     

Investigation of wax and paper materials for the fabrication of paper-based microfluidic devices

Paper-based microfluidic devices hold great potential in today’s microfluidic applications. They offer low costs, simple and quick fabrication processes, ease of uses, etc. In this work, several wax and paper materials are investigated for the fabrication of paper-based microfluidic devices. A novel method of using wax as a suitable backing to a paper-based analytical device has been demonstrated. Governing equations for the mechanics of the fluid flow in paper-based channels with constant widths have been experimentally validated. Experimental results showing deviations from the governing equations have been verified using fluidic channels with varying widths. There lies the possibility of manipulation of the fluid flow in paper-based microfluidic devices solely using geometric factors. This opens up many potential applications that may require sequential delivery of reagents or samples. Lastly, properties of paper such as the average pore diameter and permeability can be deduced from experimental results.     

Fabrication of three-dimensional microfluidic channels in a single layer of cellulose paper

Three-dimensional microfluidic paper-based analytical devices (3D-μPADs) represent a promising platform technology that permits complex fluid manipulation, parallel sample distribution, high throughput, and multiplexed analytical tests. Conventional fabrication techniques of 3D-μPADs always involve stacking and assembling layers of patterned paper using adhesives, which are tedious and time-consuming. This paper reports a novel technique for fabricating 3D microfluidic channels in a single layer of cellulose paper, which greatly simplifies the fabrication process of 3D-μPADs. This technique, evolved from the popular wax-printing technique for paper channel patterning, is capable of controlling the penetration depth of melted wax, printed on both sides of a paper substrate, and thus forming multilayers of patterned channels in the substrate. We control two fabrication parameters, the density of printed wax (i.e., grayscale level of printing) and the heating time, to adjust the penetration depth of wax upon heating. Through double-sided printing of patterns at different grayscale levels and proper selection of the heating time, we construct up to four layers of channels in a 315.4-μm-thick sheet of paper. As a proof-of-concept demonstration, we fabricate a 3D-μPAD with three layers of channels from a paper substrate and demonstrate multiplexed enzymatic detection of three biomarkers (glucose, lactate, and uric acid). This technique is also compatible with the conventional fabrication techniques of 3D-μPADs, and can decrease the number of paper layers required for forming a 3D-μPAD and therefore make the device quality control easier. This technique holds a great potential to further popularize the use of 3D-μPADs and enhance the mass-production quality of these devices.     

Image-Space Subsurface Scattering for Interactive Rendering of Deformable Translucent Objects

The authors present an algorithm for real-time realistic rendering of translucent materials such as marble, wax, and milk. Their method captures subsurface scattering effects while maintaining interactive frame rates. The main idea of this work is that it employs the dipole diffusion model with a splatting approach to evaluate the integral over the surface area for computing illumination due to multiple scattering.