What is “MVTR”?
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MVTR stands for Moisture Vapor Transmission Rate, which measures the passage of water vapor through a barrier material. It is typically expressed as grams per 100 square inches over 24 hours, with the best barrier materials currently having an MVTR of less than 0.02 g/100 in2/24 hrs. There are two main testing methods for measuring MVTR - ASTM E96 uses a chamber divided by the barrier material to measure moisture passing between environments, while ASTM F1249 uses infrared detectors to measure changes in relative humidity on the dry side of the barrier in a similar chamber setup. Protective Packaging Corporation focuses on providing high quality moisture barrier materials and packaging products to protect contents from damage by moisture.
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Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Software Engineering and Project Management - Introduction, Modeling Concepts...
Introduction, Modeling Concepts and Class Modeling: What is Object orientation? What is OO development? OO Themes; Evidence for usefulness of OO development; OO modeling history. Modeling
as Design technique: Modeling, abstraction, The Three models. Class Modeling: Object and Class Concept, Link and associations concepts, Generalization and Inheritance, A sample class model, Navigation of class models, and UML diagrams
Building the Analysis Models: Requirement Analysis, Analysis Model Approaches, Data modeling Concepts, Object Oriented Analysis, Scenario-Based Modeling, Flow-Oriented Modeling, class Based Modeling, Creating a Behavioral Model.
Unit-III-ELECTROCHEMICAL STORAGE DEVICES.ppt
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
哪里办理(csu毕业证书)查尔斯特大学毕业证硕士学历原版一模一样
原版一模一样【微信：741003700 】【(csu毕业证书)查尔斯特大学毕业证硕士学历】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
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What is “MVTR”?
- 1. What is “MVTR”? MVTR stands for “Moisture Vapor Transmission Rate“, a measure of the passage of gaseous H2O through a barrier. It’s also known as “WVTR“, or “Water Vapor Transmission Rate“. Most flexible packaging is intended to preserve contents and protect it from the damaging effects of moisture. The amount of protection is indicated in part by the material’s MVTR, which is typically expressed as g/100 in2 /24 hrs. Currently, the best barrier materials on the market today have an MVTR of <.02 g/100 in2 /24 hrs. How is moisture resistance measured? Two main testing methods measure MVTR, ASTM E96 and ASTM F1249. One variation of ASTM E96 uses a special chamber to measure moisture resistance. The chamber is divided vertically by the substrate/barrier material. A dry atmosphere is in one chamber, and a moist atmosphere is in the other. A 24-hour test is run to see how much moisture passes through the substrate/barrier from the “wet” chamber to the “dry” chamber. ASTM E96 can specify any one of five combinations of temperature and humidity in the “wet” chamber. The toughest conditions are 100°F / 95%RH (Relative Humidity). This method can be time consuming and pressure changes may impact the actual results. ASTM F1249 is an MVTR measurement method that uses infrared (IR) detectors to measure changes in RH on the dry side of a film in a chamber similar to the one used in the ASTM E96 method. Water is placed in the bottom to create a 100% RH atmosphere. Barrier material is used to divide the bottom and top. The top side of the chamber is ventilated with dry air and change in RH is measured with an IR detector. One disadvantage of this method is that the RH is limited to 100% unless special equipment is used that allows for control over RH. At Protective Packaging Corporation, we focus on providing only the highest quality moisture barrier materials, barrier bags, and other protective packaging products. With more than 25 years of experience in the field, we have the expertise to answer any of your questions. More importantly, our experience is what allows us to offer the most effective solutions, no matter the situation. If you have additional questions, please feel free to give us a call: 1-888-997-6599.