REMOTE LABORATORY MANAGEMENT APPLICATION DEVELOPMENT USING A MOBILE-BASED RESTful WEB SERVICE METHOD

Remote laboratory is a software environment that supports remote experiment activities, where users who are located at a far distance are allowed to interact with measurement devices and real laboratory equipment. The majority of remote laboratories that exist today are implemented with desktop computers. Computer-based systems have disadvantages that is large consumption of electrical energy and expensive equipment investment costs. Mobile applications can be an alternative so that energy and equipment investment costs can be further reduced and can make it easier to manage remote laboratory access because of its nature that can be used anytime and anywhere. This application was developed to remote red Pitaya's oscilloscope and signal generator. The access management system for this tool use RESTful Web Service technology so that data transfers are faster and consume relatively small data sizes. To remote a this tool, this application uses a webview plugin to display the simulator that is accessed via IP that has been provided by the tool. Based on the results of the development in this study, there are 6 main functional needs and 2 non-functional needs. Based on the test, it can be concluded that the development of remote laboratory management applications using the mobile-based RESTful web service method has met the criteria according to the design.

Comparing Composition Control Structures for Kaibel Distillation Columns

Although Kaibel distillation columns are superior to conventional distillation sequences owing to smaller equipment investment and operation cost, they display high nonlinearity and this greatly increases the difficulty of achieving their tight control. To overcome this problem, four decentralized composition control structures, i.e., the CSR/QR, CSR/B, CSD/QR, and CSD/B structures, are proposed and compared based on the control of a Kaibel distillation column fractionating a methanol/ethanol/propanol/butanol quaternary mixture. These four composition control structures all include five composition control loops. While the four of them are employed to maintain the purity of the top, upper sidestream, lower sidestream, and bottom products, the remaining one is employed to minimize the energy consumption of the Kaibel distillation column by maintaining the composition of propanol at the first stage of the prefractionator. Dynamic simulation results show the CSR/QR and CSR/B structures can tightly maintain the purity of the controlled products with a small overshoot and short settling time after facing various disturbances in feed conditions, but the CSD/QR and CSD/B structures lead to oscillatory responses (the latter even shows divergent responses under individual disturbances). At the end of the article, some effective guides for developing composition control systems are given.

Study on the Solution of Heavy Hydrocarbon Caused Frozen Stoppage in LNG Factory

This paper focus on the characteristics of heavy hydrocarbon frozen stoppage, which is based on the investigation of current problems of liquefied natural gas factory. Combined with the causes of frozen study, the paper analyzes the four kinds of technological schemes, such as "adsorption", "heavy hydrocarbon washing", "gas stripping + heavy hydrocarbon backflow" and "low temperature distillation" in a LNG project in Inner Mongolia of CNPC. It analysis the merits and drawbacks of every proposals from process simulation, process description, applicability, temperature parameters, liquefaction energy consumption, major equipment, investment etc. Finally this paper selects a heavy hydrocarbon removal process proposal, which is suitable for a LNG factory in Inner Mongolia, and is more simple process, low energy consumption, easy to operate. After the project is put into operation, the comparison between actual operation data and designed data proves the feasibility of this proposal. The results provide a guidance and reference for the subsequent LNG factory designing

Grain aeration by flush floor ducts with perforated sectional panels.

Экспериментальные исследования по аэрированию зерна проводились в основном в условиях хозяйств Ивановской области в 2015 2018 годах. Целью данной статьи является обоснование основных положений аэрирования зерна перфорированными напольными секционными покрытиями. Выбор систем аэрирования, а также их конструктивнотехнологических параметров в первую очередь зависит от предполагаемых задач, решаемых аэрированием, типа складских помещений, объёмов и вида зерна, наличия погрузочноразгрузочного оборудования, продолжительности хранения зерна, инвестиционных возможностей вложения в оборудование. Полностью перфорированные полы обеспечивают наиболее эффективное распределение воздуха в зерновой насыпи складских помещений. Данное конструктивное решение является наиболее оптимальным для напольных сушилок, но в то же время оно является и наиболее дорогостоящим. Подпольные каналы (ПК) с перфорированными напольными секционными покрытиями (ПНСП) обычно применяются для аэрирования зерна в складах и зерновых силосах. Основным технологическим преимуществом данного конструктивного решения является возможность применения традиционно используемого погрузочноразгрузочного оборудования, а также минимальные затраты людских ресурсов. В статье представлены технологические основы аэрации зерна атмосферным воздухом подпольными каналами с перфорированными напольными секционными покрытиями, а также обобщены результаты современных зарубежных исследований. Определены основные принципы проектирования и технологические режимы аэрирования путем применения ПК и ПНСП. Материалы статьи могут служить основой для разработки рекомендаций по аэрированию зерна в условиях зернопроизводящих хозяйств, а также на элеваторах и в других организациях, связанных с обработкой и хранением зерна. Investigations on grain aeration took place in the Ivanovo region in 2015 2018. The goal was to describe the process of grain aeration through the perforated sectional panels. An optimal aeration system depends on objectives, storage facility, grain quantity and type, availability of handling devices, duration of a storage period and equipment investment. Fully perforated panels allow the most effective air distribution in grain mass. They are the most optimal for the onfloor dryers but also very expensive. Floor ducts with perforated sectional panels are usually used when aerating grain in stores and grain silage. The main advantage of this system is the use of handling devices and low labor costs. The article focuses on the application of floor ducts with the perforated sectional panels for grain aeration by atmospheric air and reviews modern foreign experiments. It presents the main principles of design and technological aeration modes. The content of this work can be used for the development of regulations on grain aeration.

A Study on Real-World Complex Queries In DHT-Based for Secure Cloud Storage

Dispersed hash tables (DHT) really are a key structure hinder for current P2P content-dissemination framework, as an examplein actualizing the appropriated tracker of BitTorrent Mainline DHT. DHTs, for their completely appropriated nature, are known to be helpless against particular kinds of assaults and various kinds of resistances have been proposed against these assaults. We have distinguished an oversight in past approachs used to quantify the measure of the device and our procedure redresses this. The proposed DA engineering for 1-D DHT has extremely less calculations when contrasted with existing 1-D DCT. The proposed DHT engineering executed in FPGA shows a huge equipment investment funds when contrasted with FPGA assets utilized in a proficient memory based DA approach. The extra preferred standpoint of SDHT is that its converse change is identical to forward change with a regular division. Our technique is dependent upon demonstrating slithering errors as a Bernoulli process. It ensures an incredibly precise estimation and can provide the gauge in 5 seconds. the individuals, is closeness mindful, adjusts to arrange conditions, and recuperates rapidly and smoothly from system parcels and resulting fixes.