scholarly journals Research on the Key Techniques of TCP Protocol Normalization for Mimic Defense Architecture

2021 ◽  
Vol 3 (3) ◽  
pp. 99-107
Author(s):  
Mingxing Zhu ◽  
Yansong Wang ◽  
Ruyun Zhang ◽  
Tianning Zhang ◽  
Heyuan Li ◽  
...  
Keyword(s):  
Tcp Protocol ◽  
Key Techniques

Submarine Operation Tool and Intelligent Device

2012 ◽  
Vol 455-456 ◽  
pp. 1109-1114
Author(s):  
He Jin ◽  
Meng Qing Xing
Keyword(s):  
Primary Study ◽  
Intelligent Machine ◽  
Key Techniques

. Analysis is made to the operating task in ocean, making the series devices of marine intelligent machine the primary study content and having the deep research on its key techniques. At the same time, the corresponding prototype was produced and then tested. It proved to be that the research is feasible and the production is successful. It makes contributions towards the domestic submarine operating technology.

scholarly journals Re-Imagining Social Mobility: The Role of Relationality, Social Class and Place in Qualitative Constructions of Mobility

2021 ◽  
pp. 136078042098512 ◽  
Author(s):  
Louise Folkes
Keyword(s):  
Social Class ◽  
Working Class ◽  
Social Mobility ◽  
Educational Achievement ◽  
Ethnographic Study ◽  
Ontological Security ◽  
Occupational Position ◽  
Individual Level ◽  
Key Techniques ◽  
Class Community

Discussions around social mobility have increasingly gained traction in both political and academic circles in the last two decades. The current, established conceptualisation of social mobility reduces ‘success’ down to individual level of educational achievement, occupational position and income, focusing on the successful few who rise up and move out. For many in working-class communities, this discourse is undesirable or antithetical to everyday life. Drawing upon 13 interviews with 9 families collected as part of an ethnographic study, this article asks, ‘how were social (im)mobility narratives and notions of value constructed by residents of one working-class community?’ Its findings highlight how alternative narratives of social (im)mobility were constructed; emphasising the value of fixity, anchorage, and relationality. Three key techniques were used by participants when constructing social (im)mobility narratives: the born and bred narrative; distancing from education as a route to mobility; and the construction of a distinct working-class discourse of fulfilment. Participants highlighted the value of anchorage to place and kinship, where fulfilment results from finding ontological security. The findings demonstrate that residents of a working-class community constructed alternative social mobility narratives using a relational selfhood model that held local value. This article makes important contributions to the theorisation of social mobility in which it might be understood as a collective rather than individual endeavour, improving entire communities that seek ontological security instead of social class movement and dislocation.

scholarly journals Robotic Precisely Oocyte Blind Enucleation Method

2021 ◽  
Vol 11 (4) ◽  
pp. 1850
Author(s):  
Xiangfei Zhao ◽  
Maosheng Cui ◽  
Yidi Zhang ◽  
Yaowei Liu ◽  
Xin Zhao
Keyword(s):  
Success Rate ◽  
Nuclear Transfer ◽  
Operation Time ◽  
Volume Control ◽  
Translation Control ◽  
Cleavage Rate ◽  
Training Time ◽  
Manual Method ◽  
Control Oocyte ◽  
Key Techniques

Oocyte enucleation is a critical procedure for somatic cell nuclear transfer. Yet, the main steps of oocyte enucleation are still manually operated, which presents several drawbacks such as low precision, high repetition error, and long training time for operators. For improving the operation efficiency and success rate, a robotic precise oocyte blind enucleation method is presented in this paper. The proposed method involves the following key techniques: oocyte translation control, oocyte immobilization and penetration control, and enucleation volume control based on the adaptive slide mode. Compared with the manual blind enucleation method, the proposed robotic blind enucleation method reduced the operation time by 44.5% (manual method: 62 s vs. proposed method: 34.4 s), increased the accuracy of enucleation by 83.1% (manual method: 30.7 vs. proposed method: 5.2), increased the success rate from 80% to 93.3%, and increased the cleavage rate from 41.7% to 63.3%.

scholarly journals Cross-Protocol Unfairness between Adaptive Streaming Clients over HTTP/3 and HTTP/2: A Root-Cause Analysis

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1755
Author(s):  
Chanh Minh Tran ◽  
Tho Nguyen Duc ◽  
Phan Xuan Tan ◽  
Eiji Kamioka
Keyword(s):  
Root Cause Analysis ◽  
Transport Layer ◽  
Control Mechanisms ◽  
Adaptive Streaming ◽  
The Novel ◽  
Cause Analysis ◽  
Root Cause ◽  
Tcp Protocol ◽  
The Cross ◽  
Client Side

With the introduction of HTTP/3, whose transport is no longer the traditional TCP protocol but the novel QUIC protocol, research for solutions to the unfairness of Adaptive Streaming over HTTP (HAS) has become more challenging. In other words, because of different transport layers, the HTTP/3 may not be available for some networks and the clients have to use HTTP/2 for their HAS applications instead. Therefore, the scenario in which HAS over HTTP/3 (HAS/3) competes against HTTP/2 (HAS/2) must be considered seriously. However, there has been a shortage of investigations on the performance and the origin of the unfairness in such a cross-protocol scenario in order to produce proper solutions. Therefore, this paper provides a performance evaluation and root-cause analysis of the cross-protocol unfairness between HAS/3 and HAS/2. It is concluded that, due to differences in the congestion control mechanisms of QUIC and TCP, HAS/3 clients obtain larger congestion windows, thus requesting higher video bitrates than HAS/2. As the problem lies in the transport layer, existing client-side ABR-based solutions for the unfairness from the application layer may perform suboptimally for the cross-protocol case.

The Effect of Tool Geometrical Parameters on Cutting Temperature Based on Deform-3D

2013 ◽  
Vol 690-693 ◽  
pp. 2554-2558
Author(s):  
Hua Jing Zhang ◽  
Zhi Tao Tang
Keyword(s):  
Finite Element ◽  
Imaging System ◽  
Cutting Temperature ◽  
Element Model ◽  
Friction Model ◽  
Geometrical Parameters ◽  
Infrared Thermal Imaging ◽  
Temperature Filed ◽  
Thermal Imaging System ◽  
Key Techniques

The finite element method was adopted to predict the cutting temperature filed of workpiece surface when machining aerospace aluminum alloy 7050-T7451. Some key techniques such as the materials flow stress behavior, the separation of the chips with the workpiece, failure and fracture criterion, the tool-chip friction model were discussed in details. To validate the finite element model, the cutting temperature field of the chip was obtained by infrared thermal imaging system. The result revealed that the prediction model is credible. Based on the model, the effects of tool geometrical parameters such as flank wear, cutting edge inclination and corner radius on cutting temperature were analyzed.

Horizontal Well Penetration Rate Increasing Technology in Sulige Gas Field

2015 ◽  
Vol 733 ◽  
pp. 17-22
Author(s):  
Yang Liu ◽  
Zhuo Pu He ◽  
Qi Ma ◽  
Yu Hang Yu
Keyword(s):  
Horizontal Well ◽  
Economies Of Scale ◽  
Reference Value ◽  
Drilling Speed ◽  
Underground Engineering ◽  
Gas Field ◽  
Horizontal Section ◽  
Well Drilling ◽  
Drilling Parameters ◽  
Key Techniques

In order to improve the drilling speed, lower the costs of development and solve the challenge of economies of scale development in sulige gas field, the key techniques research on long horizontal section of horizontal well drilling speed are carried out. Through analyzing the well drilling and geological data in study area, and supplemented by the feedback of measured bottom hole parameters provided by underground engineering parameters measuring instrument, the key factors restricting the drilling speed are found out and finally developed a series of optimum fast drilling technologies of horizontal wells, including exploitation geology engineering technique, strengthen the control of wellbore trajectory, optimize the design of the drill bit and BHA and intensify the drilling parameters. These technologies have a high reference value to improve the ROP of horizontal well in sulige gas field.

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