The Improvement of Refrigerators Rotary Oil Pump

2013 ◽  
Vol 365-366 ◽  
pp. 86-90
Author(s):  
Yan Jing ◽  
Feng Zhao
Keyword(s):  
Lubricating Oil ◽  
Working Environments ◽  
Oil Pump ◽  
The Common ◽  
Design Ideas ◽  
And Storage ◽  
Rotor Type

Screw refrigerators are widely used in subzero refrigeration and storage fields. The manufacturers always use rotor-type pumps as their lubricating oil pumps. This paper introduces the advantages of screw refrigerators, the usage of oil pumps and the working environments. It mainly studies the common faults of oil pump, proposes several design ideas for analysis and comparison and determines the final improvement schemes on the premise of comprehensively considering structure, performance and cost.

scholarly journals THREE DIMENSIONAL SIMULATION OF OIL FLOW CHARACTERISTICS IN LUBRICATION SYSTEM OF ROTARY TILLAGE ENGINE

2021 ◽  
pp. 163-172
Author(s):  
Junxiang Gao ◽  
Xiaoliang Gao ◽  
Wei Zou
Keyword(s):  
Pressure Drop ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Lubricating Oil ◽  
Flow Index ◽  
Lubrication System ◽  
Pump Rotor ◽  
Oil Pump ◽  
Oil Flow ◽  
Dimensional Simulation

Taking the lubrication system of rotary tillage engine as the research object, this paper makes a three-dimensional simulation study on the oil flow characteristics in the lubricating oil passage. The oil supply of the oil pump shall be greater than the circulating oil required by the lubrication system to ensure the lubrication of the rotary cultivator. Lubrication system is an important part to ensure the reliability and durability of rotary cultivator. The key component to achieve its performance is the oil pump. The geometric model of lubricating oil flow field in rotary tiller lubrication system is established by using FLUENT software. The results show that the pressure drop in the lubricating oil passage of the main bearing is the largest under the same working conditions. In the oil passage of the cylinder head, the pressure drop of the front main oil passage is the largest and the oil discharge is the largest. Add 1.6mm oil pump rotor on the basis of the thickness of the original oil pump rotor, the oil flow at the connecting rod nozzle reaches the flow index of the original rotary cultivator, and there is no cylinder pulling phenomenon of the rotary cultivator.

Modeling Motion

2011 ◽  
pp. 327-345
Author(s):  
Roy Gelbard ◽  
Israel Spiegler
Keyword(s):  
Basic Problem ◽  
Building Blocks ◽  
Motion Data ◽  
Data Comparison ◽  
Motion System ◽  
Binary Model ◽  
The Common ◽  
Key Frames ◽  
Machine Readable ◽  
And Storage

The research proposes a model for the representation and storage of motion data that enables the communication, storage, and analysis of patterns of motion, as with spoken and written languages. The basic problem is the lack of a machine-readable motion alphabet. We thus set out to define the elemental components and building blocks of motion, coming up with what we call the motion byte as the basis for a motion language that has words, phrases, and sentences. The binary-based model we develop, which is significantly different from the common “key frames” approach, is also a method of storing motion data. Comparison with a standard motion system, based on key frames, indicates a significant advantage for our binary model.

Cognitive Abilities and Their Interplay

2006 ◽  
Vol 27 (2) ◽  
pp. 57-72 ◽  
Author(s):  
Markus Buehner ◽  
Stefan Krumm ◽  
Matthias Ziegler ◽  
Tonja Pluecken
Keyword(s):  
Working Memory ◽  
Sustained Attention ◽  
Cognitive Abilities ◽  
Latent Variables ◽  
Common Variance ◽  
Crystallized Intelligence ◽  
The Common ◽  
Highly Correlated ◽  
Almost All ◽  
And Storage

The aim of this study was to confirm that coordination and storage in the context of processing are significant predictors of reasoning even if crystallized intelligence is controlled for. It was also expected that sustained attention and coordination would be highly correlated. Therefore, 20 working memory tests, 2 attention tests, and 18 intelligence subtests were administered to 121 students. We were able to replicate results indicating that storage in the context of processing and coordination are significant predictors of reasoning. Controlling for crystallized intelligence did not decrease the common variance between working memory and reasoning. The study also revealed that the factors coordination and sustained attention were highly correlated. Finally, a model is presented with the latent variables speed and g, which can explain almost all of the common variance of the applied aggregates. A detailed discussion of the results supports the view that working memory and intelligence share about 70% of the common variance.

scholarly journals Kajian Kegagalan Komponen Dan Perawatan Pada Sistem Pelumas Mesin Diesel Di Kapal

2021 ◽  
pp. 1-6
Author(s):  
Ratna Indriyani ◽  
Dwisetiono Dwisetiono
Keyword(s):  
Failure Mode ◽  
Preventive Maintenance ◽  
Lubricating Oil ◽  
Effect Analysis ◽  
Corrective Maintenance ◽  
Oil Pump ◽  
Oil Cooler ◽  
Oil Tank ◽  
Main Engine

Mesin diesel sebagai mesin induk di kapal dapat berfungsi dengan baik apabila ditunjang oleh sistem-sistem pendukung yang baik seperti sistem pelumas (lubricating oil system). Sistem pelumas salah satu sistem yang sangat penting dalam pengoperasian kapal, kegagalan pada sistem pelumasan menyebabkan sistem tidak beroperasi semestinya dan dapat mengalami kerugian dari pihak kapal. Kajian ini bertujuan untuk mengetahui kagagalan pada setiap komponen sistem pelumas di main engine dan perawatan yang tepat. Kajian ini dilakukan dengan menggunakan metode Failure Mode and Effect Analysis (FMEA) untuk mengoptimalkan cara mengatasi kegagalan dan perawatan mesin utama kapal untuk mengidentifikasi strategi dan prioritas perawatan. Dengan menggunakan FMEA dapat mengetahui kegagalan serta efek yang ditimbulkan oleh tiap-tiap komponen dapat diketahui dan untuk melakukan perawatan harus mengelompokan komponen berdasarkan tingkat resiko rendah sampai tinggi. Komponen lubricating oil tank dan sump tank memiliki resiko yang rendah, lubricating oil cooler memiliki resiko sedang dan lubricating oil pump, lubricating oil filter, purifier, transfer pump dan lubricating purifier heater memiliki resiko tinggi. Hasil dari kegagalan komponen sistem pelumas sangat berguna untuk mengidentifikasi strategi perawatan berdasarkan tingkat resiko komponen tersebut dengan memilih antara perawatan pencegahan (preventive maintenance) dan perawatan korektif (corrective maintenance).

Research on the Compression Mechanism of Densified Biomass Fuel

2014 ◽  
Vol 953-954 ◽  
pp. 195-198
Author(s):  
Xia Zhang ◽  
Zong Shou Cai ◽  
Li Hong Chen ◽  
Ying Chen
Keyword(s):  
Calorific Value ◽  
Biomass Fuel ◽  
Chemical Components ◽  
Compression Mechanism ◽  
The Common ◽  
Densified Biomass ◽  
Biomass Particles ◽  
And Storage ◽  
Comprehensive Study

By using mechanical force, biomass can be compressed or extruded into densified solid fuel with higher bulk density and higher calorific value, which makes it convenient in transportation and storage. The compressing technology of biomass is considered as one of the simplest and the most direct way to utilize biomass as a fuel in the world. However, due to the different chemical composition of biomass, the compression mechanism of biomass particles is different from other particles of coal, ceramics, metals and other materials. A comprehensive study on the compression mechanism of densified biomass fuel was carried out in this paper. The effects of the common chemical components of biomass on the quality of the densified fuel were further explored. The purpose of this paper is to provide a theoretical basis and a technical reference to understand the compression mechanism of biomass.

scholarly journals File Fragmentation to Improve Security in Cloud Using Graph Topology Grid Algorithm: A Survey

2019 ◽  
Vol 8 (S2) ◽  
pp. 46-51
Author(s):  
S. Abdul Saleem ◽  
N. Ramya
Keyword(s):  
Cloud Computing ◽  
Cloud Environment ◽  
Graph Topology ◽  
Retrieval Time ◽  
Meaningful Information ◽  
System Data ◽  
Grid Algorithm ◽  
The Common ◽  
Fragmented Data ◽  
And Storage

Cloud computing is an emerging patterning that provides computing, communication and storage resources-as-service over a network. In existing system, data stored in a cloud is unsafe due to the eaves dropping and hacking process. To overcome the drawbacks of earlier approaches, Division and Replication of Data in the Cloud for Optimal Performance and Security (DROPS) methodology is used. The node selection is ensured by means of Graph Topology Grid Algorithm and also data is encrypted here for security. In this process, the common data are divided into multiple nodes and replicate the fragmented data over the cloud nodes. Each data is stored in a different node as fragments in individual locations. In case of any attackers attack a node, no meaningful information will expose to them. The controlled replication of the file fragments is ensured and each of the fragments is replicated only once for the purpose of improved security and minimal retrieval time. In this survey, various relevant approaches were studied and analyzed. Furthermore the DROPS with Graph Topology Grid Algorithm give the better way of security in cloud environment over the earlier approaches.

scholarly journals Research on the building restoration engineering and materials of the Night Watch House in Macau - taking the Patane Night Watch House in Patane as an example

2021 ◽  
Vol 284 ◽  
pp. 05004
Author(s):  
Yile Chen ◽  
Junrui Cao ◽  
Liang Zheng
Keyword(s):  
Hong Kong ◽  
Historical Development ◽  
Restoration Project ◽  
The Common ◽  
Cultural Relic ◽  
Architectural Characteristics ◽  
Design Ideas ◽  
House Building

As the only existing example of the Night Watch House building in Guangdong, Hong Kong and Macau, the Patane Night Watch House has become one of the common cultural relic building restoration methods and revitalization design ideas in Macau. Study and explore the restoration problems from four aspects: the historical development of the Macau Museum, the construction context, the Lingnan architectural characteristics, the methods and materials of the restoration project, and hope that this will be used as a follow-up of similar types of buildings in Macau and the Lingnan Cantonese area to provide some experience reference.

scholarly journals The Identity of Iranian Architecture and the Formation of Fashion Design Ideas

2018 ◽  
Vol 4 (1) ◽  
pp. 231 ◽  
Author(s):  
Pouria Mohammad Karimi ◽  
Cyrus Bavar
Keyword(s):  
Initial Function ◽  
Fashion Design ◽  
Two Dimensional ◽  
Computer Tools ◽  
Clothing Design ◽  
Effective Role ◽  
The Common ◽  
Design Ideas ◽  
The Relationship ◽  
Research Show

Throughout history, fashion and architecture have repeated each other in terms of form and appearance. It seems quite natural that they share not only their initial function, which is to provide shelter and protect human; but also show skills in creating space and volume beyond the two-dimensional plates and materials. In recent years, the relationship between clothing design and architecture has become more significant. Computer tools and software have changed the borders of designing each one. Buildings are more fluid and clothes are more architectural. The architectural alphabet in fashion from one hand, and on the other hand the fashion ideas and methods used in architecture as well as experiencing similar themes in both domains are among the features of these arts. The exploitation of such common points among the two areas challenges the conventional ideas and pre-defined concepts of design, putting forward new solutions and experiences for designers. In this research, some of these common ideas have been studied and how these ideas are linked within both of these domains. The method of this research is descriptive and analytical; and data are collected from documents and research materials including books, articles, photos and electronic resources. This research seeks the common ideas in architecture and fashion and their mutual interaction with each other and provides some examples in both arts. The results of this research show that architecture has an effective role in shaping fashion and the attitude to the clothing design.

scholarly journals Stepwise Covariance-Free Common Principal Components (CF-CPC) With an Application to Neuroscience

2021 ◽  
Vol 15 ◽  
Author(s):  
Usama Riaz ◽  
Fuleah A. Razzaq ◽  
Shiang Hu ◽  
Pedro A. Valdés-Sosa
Keyword(s):  
Principal Component ◽  
Covariance Matrices ◽  
Anatomical Structure ◽  
High Dimensional ◽  
Frequency Range ◽  
Multivariate Technique ◽  
Shared Variables ◽  
The Common ◽  
And Storage ◽  
Iris Data

Finding the common principal component (CPC) for ultra-high dimensional data is a multivariate technique used to discover the latent structure of covariance matrices of shared variables measured in two or more k conditions. Common eigenvectors are assumed for the covariance matrix of all conditions, only the eigenvalues being specific to each condition. Stepwise CPC computes a limited number of these CPCs, as the name indicates, sequentially and is, therefore, less time-consuming. This method becomes unfeasible when the number of variables p is ultra-high since storing k covariance matrices requires O(kp2) memory. Many dimensionality reduction algorithms have been improved to avoid explicit covariance calculation and storage (covariance-free). Here we propose a covariance-free stepwise CPC, which only requires O(kn) memory, where n is the total number of examples. Thus for n < < p, the new algorithm shows apparent advantages. It computes components quickly, with low consumption of machine resources. We validate our method CFCPC with the classical Iris data. We then show that CFCPC allows extracting the shared anatomical structure of EEG and MEG source spectra across a frequency range of 0.01–40 Hz.

Perancangan Busana Magnificent Of Modular Mode

2021 ◽  
Vol 1 (1) ◽  
pp. 52
Author(s):  
Meilinda Lenawati ◽  
Rachmawaty -
Keyword(s):  
Reduction Method ◽  
Modular Design ◽  
Sustainable Design ◽  
Quick Response ◽  
Low Carbon ◽  
Response Effort ◽  
Fast Fashion ◽  
Common Thread ◽  
The Common ◽  
Design Ideas

Fast fashion can be interpreted as a quick response effort in providing the latest fashionable clothes according to consumer demand. This can lead to a accumulation of clothes which eventually becomes clothing waste. Clothing waste can be overcome with two opportunities, namely reuse and reduction, this reduction method uses the principle of sustainable design. Sustainable that is raised is a modular design. "Modular design" is a kind of design fashion that can not only make clothes more attractive, allow the wearer to participate in choices, increase the possibility of clothing styles, but also can extend the service cycle of clothes. In this "fast fashion" market, modular design ideas can be a breaking point, helping us find ways to balance low-carbon and eco-friendly needs and fashion. Therefore, there is a need for a ready-to-wear fashion modular design that inspires the Woloan Minahasa Stage House that can be disassembled. This will be the common thread in the creation of the work.

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