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Journal articles on the topic 'DNC system'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Wang, Min Jie, Y. J. Cai, and W. G. Yan. "Study on Key Technologies of DNC System Oriented Networked Manufacturing." Key Engineering Materials 291-292 (August 2005): 667–72. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.667.

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As one of major methods to meet information integration of numerical control machines in workshop, DNC (Direct Numerical Control or Distributed Numerical Control) oriented networked manufacturing (Web-DNC system) differs dramatically from conventional ones by having: (1) concurrently supporting networked manufacturing; (2) sharing the numerical control machines via network; (3) optimizing the configuration and reorganization of numerical control resources. This paper deals with the key technologies of Web-DNC system, including: the implementing architecture model with four layers (user layer, service layer, agent layer and facility layer) and the topology architecture. The BL2000 SCM is selected as a COM server to meet the required capabilities of DNC controller. Compared with the communication architecture with fieldbus, a simpler function model of DNC communication technology based on Ethernet technology is presented. A Web-DNC system prototype is developed and proved to be effective in information integration of numerical control machines in injecton workshop.

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2

Chen, Jing. "Application of DNC Communication System Based on Network Manufacturing Technology." Applied Mechanics and Materials 40-41 (November 2010): 682–85. http://dx.doi.org/10.4028/www.scientific.net/amm.40-41.682.

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DNC is referred to as the Direct Numerical Control, Intended for direct digital control. It means a number of numerical control equipment directly connected to a computer, and the central computer in charge of the NC program’s management and transfer. At present, DNC system includes not only the NC program, but also the manufacturing data of the specific tasks required for the production, such as cutting tools data, scheduling, configuration information of machine tools, and so on, and part of the DNC system also has the functions of machine tool state acquisition and remote control.

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3

Zhang, Sheng Fang, Chang Jun Ji, Zhi Hua Sha, and Chen Hao Ma. "Study on Key Technologies of Practical DNC System." Advanced Materials Research 139-141 (October 2010): 1184–87. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1184.

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Aim at the communication problems of computer and NC machine tool, a practical DNC system is developed in this paper. A three-layer control structure mode – which is composed by the unit layer, DNC computer workstation layer and NC system equipment layer – is presented. Based on its good real-time capability and high reliability, CAN field-bus is introduced into the DNC communication system construction, the network topology is constructed and related hardware is chosen properly. Using VC++6.0 as development tool, and assisted with special compiling tools LEX&YACC, 3D standard graphic library OpenGL and database Microsoft Access, and based on the multi-task and multi-thread technologies, the software of the system is developed. The system has the characteristics of reliable operation, simple structure and high real-time capability, can improve the efficiency of NC machining process obviously, and has a certain application prospect in the middle and small scale manufacturing enterprises of our country.

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4

Ni, Xiao Hong, and Zhen Qing Gao. "System Development in Integration of DNC-Based Manufacturing Information." Applied Mechanics and Materials 312 (February 2013): 464–68. http://dx.doi.org/10.4028/www.scientific.net/amm.312.464.

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DNC is a typical way of integrating manufacturing information. In order to provide information for managers and technicians, this paper firstly researches on manufacturing information integration model based on DNC, and then designs the architecture of the workshop network and the mode of information exchange through Ethernet on analysis of manufacturing information stream. It also presents a method of information acquisition from NC machine. Finally, the validity of the model and network is verified by implementation of the manufacturing information integration system.

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5

Huang, Song Bo, and Guang Rong Yan. "Research on Solution and Key Technologies of Network DNC for CNC Workshop." Advanced Materials Research 282-283 (July 2011): 670–74. http://dx.doi.org/10.4028/www.scientific.net/amr.282-283.670.

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In order to improve average utilization of CNC machine tools in CNC workshop, this paper presents a network DNC solution which involves basic tools, management tools, communication and monitor tools as well as integration tool. The key technologies such as the DNC system communicated with CNC machine tools, information collection and analysis for machine tools, document management and DNC system integrated with other application system, etc. are introduced in this paper. The technologies and solution are verified in a missile institute, and the production efficiency and the production management are enhanced significantly in this institute.

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6

Fazliana Fadzail, Noor, Samila Mat Zali, Arizadayana Zahalan, and Mohd Alif Ismail. "Parameter Estimation for Dynamic Model of Distribution Network Cell (DNC) Using Fuzzy System." Applied Mechanics and Materials 793 (September 2015): 489–93. http://dx.doi.org/10.4028/www.scientific.net/amm.793.489.

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The aim of this project is to develop parameter estimation for dynamic model of distribution network cell (DNC) using fuzzy system. The parameter value was updated through adaptive neuro-fuzzy inference system (ANFIS). The active and reactive power responses from the fuzzy model were compared with the response from the full DNC model at various types of disturbances. The response of full DNC model was obtained from the UK 11 kV distribution network model. The model was built in DigSILENT PowerFactory software. The results obtained shown that the fuzzy model was more simple as only a few parameters involved in developing the equivalent model. This simplicity was reflected in the low computational time. In conclusion, the parameter estimation using fuzzy system was successfully developed.

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7

Fan, Tao, Chang-Zhong Chen, Xiao-Hong Ren, and Ping He. "Adaptive Synchronization of Delayed Chen Chaotic System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 3, no. 4 (December 2014): 367–78. http://dx.doi.org/10.5890/dnc.2014.12.001.

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8

Zhuang, Dian Zheng, and Yu Hua Zhu. "Research on Network NC Manufacturing Based on Internet." Applied Mechanics and Materials 441 (December 2013): 947–50. http://dx.doi.org/10.4028/www.scientific.net/amm.441.947.

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The paper introduced the method and technology of how to implement a Integrated Manufacturing, each CNC machining equipment is equipped with a special communication unit, each communication unit are directly connected with the DNC main control computers on the Internet, effect of special communication unit is mainly data buffer and protocol conversion, the TCP/IP protocol is used between communication unit and DNC main control Internet computer, and used serial communication protocol communication between communication unit and NC equipment. Using this technology, all kinds of CNC machining equipment and DNC system can be easily with the CAD/CAM/CAE system, digital profile measurement system, fault diagnosis and error compensation of intelligent system integration, providing good technical conditions for further information of various advanced manufacturing environment integration.

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9

Yudianto, Yudianto. "AN OVERVIEW OF DIRECT OR DISTRIBUTED NUMERICAL CONTROL IN COMPUTER NUMERICAL CONTROL APPLICATIONS." Journal of Mechanical Science and Engineering 7, no. 2 (January 23, 2021): 025–29. http://dx.doi.org/10.36706/jmse.v7i2.38.

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Direct numerical control is also known as distributed numerical control (also abbreviated DNC), is a common manufacturing term for networking CNC machine tools. On some CNC machine controllers, the available memory is too small to contain the machining program (for example machining complex surfaces), so in this case the program is stored in a separate computer and sent directly to the machine, one block at a time. If the computer is connected to a number of machines it can distribute programs to different machines as required. Usually, the manufacturer of the control provides suitable DNC software. However, if this provision is not possible, some software companies provide DNC applications that fulfill the purpose. DNC networking or DNC communication is always required when Computer-Aided Manufacturing (CAM) programs are to run on some CNC machine control. Wireless DNC is also used in place of hard-wired versions. Controls of this type are very widely used in industries with significant sheet metal fabrication, such as the automotive, appliance, and aerospace industries. A DNC system has to fulfill two basic tasks such as first guaranteeing secure, timely data transfer from and to the CNC controllers, secondly administering many thousands of NC programs.

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10

Li, Xihao. "Standardization of Agent-based Modeling in Economic System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 3, no. 3 (September 2014): 293–302. http://dx.doi.org/10.5890/dnc.2014.09.006.

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11

Bozhkov, Yuri, Valter Aparecido, and Silva Junior. "Group Analysis of the Generalized Hunter-Saxton System." Interdisciplinary journal of Discontinuity, Nonlinearity and Complexity 6, no. 2 (June 2017): 165–71. http://dx.doi.org/10.5890/dnc.2017.06.004.

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12

Yuan, Jian, and Bao Shi. "Sliding Mode Control of Fractional Lorenz-Stenflo Hyperchaotic System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 4, no. 4 (November 2015): 445–55. http://dx.doi.org/10.5890/dnc.2015.11.007.

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13

Abirami, K., S. Rajasekar, and M. A. F. Sanjuan. "Vibrational Resonance in a System with a Signum Nonlinearity." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 5, no. 1 (March 2016): 43–58. http://dx.doi.org/10.5890/dnc.2016.03.006.

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14

Ao, Mao Yao, and Yan Zhao. "The Research of Heterogeneous CNC Machine Tool DNC Integration System Based on OPC Technology." Applied Mechanics and Materials 246-247 (December 2012): 1031–34. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.1031.

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Because different manufacturers of CNC machine tool use the different NC system at present, it results the actuality that the CNC machine tool is hard to integrate and manage. This paper proposed a scheme of DNC integrated system of heterogeneous CNC Machine Tool based on OPC technology, after analyzing OPC interface and industrial Ethernet technology. Establish workshop-level experimental platform of DNC system based on Ethernet network. On this platform, establish the communication with OPC Server by using VC, realize monitoring and management to the bottom heterogeneous CNC machine tool. The example proved that the scheme was practical and effective.

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15

Urbina, F., S. Rica, and E. Tirapegui. "Coarse-Graining and Master Equation in a Reversible and Conservative System." Interdisciplinary journal of Discontinuity, Nonlinearity and Complexity 4, no. 2 (June 2015): 197–208. http://dx.doi.org/10.5890/dnc.2015.06.007.

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16

Uchaikin, V. V. "On the Way to Generalized Kinetics for Multi-scale Complex System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 8, no. 2 (June 2019): 199–210. http://dx.doi.org/10.5890/dnc.2019.06.007.

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17

Bazhenov, V. A., O. S. Pogorelova, and T. G. Postnikova. "Breakup of Closed Curve - Quasiperiodic Route to Chaos in Vibroimpact System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 8, no. 3 (September 2019): 299–311. http://dx.doi.org/10.5890/dnc.2019.09.006.

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18

Tang, Xiaowei, Xilin Fu, and Xiaohui Sun. "The Dynamical Behaviorof a Two Degrees of Freedom Oblique Impact System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 9, no. 1 (March 2020): 117–39. http://dx.doi.org/10.5890/dnc.2020.03.009.

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19

Bhuvaneswari, V., and K. Balachandran. "Estimates from below for blow up time for two species chemotaxis system." Interdisciplinary journal of Discontinuity, Complexity, and Nonlinearity 6, no. 3 (September 2017): 205–315. http://dx.doi.org/10.5890/dnc.2017.09.005.

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20

Vougalter, Vitali. "On the Well-posedness of the Magnetic, Semi-relativistic Schrodinger-Poisson System." Interdisciplinary journal of Discontinuity, Nonlinearity and Complexity 7, no. 3 (September 2018): 233–41. http://dx.doi.org/10.5890/dnc.2018.09.002.

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21

Kovalevsky, Dmitry V., and Klaus Hasselmann Hasselmann. "A Hierarchy of Out-of-Equilibrium Actor-Based System-Dynamic Nonlinear conomic Models." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 3, no. 3 (September 2014): 303–18. http://dx.doi.org/10.5890/dnc.2014.09.007.

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22

Gazi, N. H., M. R. Mandal, and S. Sarwardi. "Study of a Predator-Prey System with Monod-Haldane Functional Response and Harvesting." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 9, no. 2 (June 2020): 229–43. http://dx.doi.org/10.5890/dnc.2020.06.005.

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23

Uchaikin, V. V., V. A. Litvinov, and E. V. Kozhemjakina. "Nonlinear Modifications of Perturbation Theory with Some Examples of Applications to Complex System Analysis." Interdisciplinary journal of Discontinuity, Nonlinearity and Complexity 7, no. 3 (September 2018): 327–54. http://dx.doi.org/10.5890/dnc.2018.09.009.

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24

Kislitsyn, Alexey A., and Yurii N. Orlov. "Dynamical System Model with the use of Liouville Equation for Empirical Distribution Function Densities." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 9, no. 4 (December 2020): 529–40. http://dx.doi.org/10.5890/dnc.2020.12.006.

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25

Adinku, Ofotsu. "Cultural Education in Ghana: A Case Study of Dance Development in the University System." Dance Chronicle 27, no. 1 (December 26, 2004): 49–66. http://dx.doi.org/10.1081/dnc-120029926.

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26

Bhattacharyya, Anindita, Sanghita Bose, Ashok Mondal, and A. K. Pal. "Modelling and Analysis of an One-predator Two-prey Ecological System with Fear Effect." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 10, no. 4 (December 2021): 585–604. http://dx.doi.org/10.5890/dnc.2021.12.001.

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27

Vo Ngoc, Phu. "Latent Semantic Analysis using a Dennis Coefficient for English Sentiment Classification in a Parallel System." International Journal of Computers Communications & Control 13, no. 3 (May 27, 2018): 408–28. http://dx.doi.org/10.15837/ijccc.2018.3.3044.

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We have already survey many significant approaches for many years because there are many crucial contributions of the sentiment classification which can be applied in everyday life, such as in political activities, commodity production, and commercial activities. We have proposed a novel model using a Latent Semantic Analysis (LSA) and a Dennis Coefficient (DNC) for big data sentiment classification in English. Many LSA vectors (LSAV) have successfully been reformed by using the DNC. We use the DNC and the LSAVs to classify 11,000,000 documents of our testing data set to 5,000,000 documents of our training data set in English. This novel model uses many sentiment lexicons of our basis English sentiment dictionary (bESD). We have tested the proposed model in both a sequential environment and a distributed network system. The results of the sequential system are not as good as that of the parallel environment. We have achieved 88.76% accuracy of the testing data set, and this is better than the accuracies of many previous models of the semantic analysis. Besides, we have also compared the novel model with the previous models, and the experiments and the results of our proposed model are better than that of the previous model. Many different fields can widely use the results of the novel model in many commercial applications and surveys of the sentiment classification.

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28

Polach, Pavel, Miroslav Byrtus, Zbynek Sika, and Michal Hajzman. "Fibre Spring-damper Computational Models in a Laboratory Mechanical System and Validation with Experimental Measurement." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 6, no. 4 (December 2017): 513–23. http://dx.doi.org/10.5890/dnc.2017.12.009.

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29

Guo, Siyu, and Albert C. J. Luo. "A Parameter Study on Periodic Motions in a Discontinuous Dynamical System with Two Circular Boundaries." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 10, no. 2 (June 2021): 289–309. http://dx.doi.org/10.5890/dnc.2021.06.009.

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30

Dao, Thu-Thuy Thi, and Pham Ngoc Son. "Cancel-Decode-Encode Processing on Two-Way Cooperative NOMA Schemes in Realistic Conditions." Wireless Communications and Mobile Computing 2021 (April 28, 2021): 1–15. http://dx.doi.org/10.1155/2021/8828443.

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This paper considers the effects of perfect/imperfect successive interference cancellation (SIC) and perfect/imperfect ` information (CSI) in a multiple-relay two-way cooperative network using nonorthogonal multiple access (NOMA) and digital network coding (DNC). In this model, a relay is selected by maximizing estimated channel gains to enhance the decoding capacity of the nearer source and minimize the collection time of imperfect CSI. Spectrum utilization efficiency is enhanced two times by a mixture of the SIC and DNC techniques at the selected relay (called as the SIC-2TS protocol). The system performance is considered through analysis of the exact and asymptotic expressions of the system outage probabilities and throughput. The major thing is exposed as the proposed SIC-2TS protocol can reach the best performance at optimal positions of the selected relay. Besides, the system throughput of the proposed protocol outperforms a SIC-utilized two-way relaying scheme without the DNC (called as the SIC-3TS protocol) and a conventional two-way scheme (called as the CONV-4TS protocol) for all signal-to-noise ratio regions. Lastly, the validity of the analytical expressions is verified by the Monte Carlo simulation results.

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31

Roopnarain, Ryan, and S. Roy Choudhury. "Distributed Delay Effects on Coupled van der Pol Oscillators, and a Chaotic van der Pol-Rayleigh System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 10, no. 1 (March 2021): 87–115. http://dx.doi.org/10.5890/dnc.2021.03.007.

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32

Guidad, Derradji, Khaled Zennir, Abdelhak Berkane, and Mohamed Berbiche. "The effect of damping terms on decay rate for system of three nonlinear wave equations with weak-memories." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 10, no. 4 (December 2021): 635–47. http://dx.doi.org/10.5890/dnc.2021.12.005.

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33

Duraisamy, P., and T. Nandha Gopal. "Existence and Uniqueness of Solutions for a Coupled System of Higher Order Fractional Differential Equations with Integral Boundary Conditions." Interdisciplinary journal of Discontinuity, Nonlinearity and Complexity 7, no. 1 (March 2018): 1–14. http://dx.doi.org/10.5890/dnc.2018.03.001.

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34

Greer, Robert A. "The Navigation Sensor System Interface Project." Journal of Navigation 46, no. 2 (May 1993): 238–44. http://dx.doi.org/10.1017/s0373463300011577.

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The AN/SSN-6 Navigation Sensor System Interface (NAVSSI) Project is a new system being designed with two primary objectives; to serve as the central distribution computer for navigation data to shipboard combat/weapon systems and to serve as the electronic chart display and information system (ECDIS). The NAVSSI will operate the digital nautical chart (DNC) database being developed by the Defense Mapping Agency (DMA). Our goal is for the digital nautical chart to replace the paper chart as a legal means of ownship navigation plotting. This paper will introduce the project and will primarily explore the use of digital nautical charts for ownship navigation with NAVSSI.

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35

Yang, Shu Yi, Cheng Huang, and Yan Fang He. "NC Machine Tool Control System Design Based on CAN Bus." Applied Mechanics and Materials 48-49 (February 2011): 730–33. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.730.

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With the development of computer network and automation technology, network production of NC machine tool has become trend in enterprise. Aim at communicate interface of NC machine tool, a NC machine tool control system design based on CAN bus was presented. Asynchronism serial communication software between DNC host computer with NC system and hardware realization of CAN bus communication and the key technologies for realizing system were discussed in detail.

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36

Son, Pham Ngoc, Tran Trung Duy, and Khuong Ho-Van. "SIC-Coding Schemes for Underlay Two-Way Relaying Cognitive Networks." Wireless Communications and Mobile Computing 2020 (August 24, 2020): 1–17. http://dx.doi.org/10.1155/2020/8860551.

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In this paper, we propose an underlay two-way relaying scheme with the successive interference cancellation (SIC) solution in which two secondary sources transmit simultaneously their data to each other through secondary relays. The proposed scheme is operated in only two time slots and under an interference constraint of a primary receiver, denoted as the UTW-2TS scheme. In the UTW-2TS scheme, the secondary relays employ the SIC operation to decode successively the data from received broadcast signals and then encode these data by two techniques: digital network coding (DNC) enforced by XOR operations (denoted as the UTW-2TS-DNC protocol) and superposition coding (SC) enforced by power domain additions (denoted as the UTW-2TS-SC protocol). A selected secondary relay which subjects to maximize decoding capacities and to minimize collection time of channel state information in two protocols UTW-2TS-DNC and UTW-2TS-SC experiences residual interferences from imperfect SIC operations. Outage probabilities and throughputs are solved in terms of exact closed-form expressions to evaluate the system performance of the proposed protocols. Simulation and analysis results provide performance enhancement of the proposed protocols UTW-2TS-DNC and UTW-2TS-SC owing to increase the number of the cooperative secondary relays, the interference constraints, and the distances from the secondary network to the primary receiver. The best throughputs are pointed at optimal interference power allocation coefficients and optimal locations of the selected secondary relay. Considering the same power consumption, the UTW-2TS-DNC protocol outperforms the UTW-2TS-SC protocol. Finally, the simulation results are collected to confirm the exact analysis values of the outage probabilities and throughputs.

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37

Vogel, Thomas K., and S. Roy Choudhury. "Establishing the Onset, and Parameter and Spatial Domains, of Chaos in a Smooth Quadratic Autonomous System Using Sil’nikov Criteria and Competitive Modes Analysis." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 2, no. 1 (March 2013): 1–19. http://dx.doi.org/10.5890/dnc.2012.10.001.

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38

Jeong, Hwa Young, and Bong Hwa Hong. "The System Software for Automatic Jam Detection and Recovery on Manufacturing System." Applied Mechanics and Materials 271-272 (December 2012): 575–79. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.575.

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In manufacturing system, around the year 1950’s, computer aided design (CAD) and developments of NC resulted which led to the evolution of systems like computer numerical control (CNC) and direct numerical control (DNC). Today, computer integrated manufacturing is a reality. The advent of computer integrated manufacturing system has got an efficiency and high performance for production. And manufacturing system operating ratio was related by cost-efficiency of the factory operation and increasing good production. However it has still problem that the system engineer who is in the factory hard to keep watching the manufacturing system always in order to recover the manufacturing system when it has system error. In this paper, we propose system jam detection and recovery process for manufacturing system. For this process, we make and use system Jam Database and Jam Recovery Process Sequence.

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39

Phuong, N. T., A. Dutrey, E. Chapillon, S. Guilloteau, J. Bary, T. L. Beck, A. Coutens, et al. "An unbiased NOEMA 2.6 to 4 mm survey of the GG Tau ring: First detection of CCS in a protoplanetary disk." Astronomy & Astrophysics 653 (September 2021): L5. http://dx.doi.org/10.1051/0004-6361/202141881.

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Context. Molecular line surveys are among the main tools to probe the structure and physical conditions in protoplanetary disks (PPDs), the birthplace of planets. The large radial and vertical temperature as well as density gradients in these PPDs lead to a complex chemical composition, making chemistry an important step to understand the variety of planetary systems. Aims. We aimed to study the chemical content of the protoplanetary disk surrounding GG Tau A, a well-known triple T Tauri system. Methods. We used NOEMA with the new correlator PolyFix to observe rotational lines at ∼2.6 to 4 mm from a few dozen molecules. We analysed the data with a radiative transfer code to derive molecular densities and the abundance relative to 13CO, which we compare to those of the TMC1 cloud and LkCa 15 disk. Results. We report the first detection of CCS in PPDs. We also marginally detect OCS and find 16 other molecules in the GG Tauri outer disk. Ten of them had been found previously, while seven others (13CN, N2H+, HNC, DNC, HC3N, CCS, and C34S) are new detections in this disk. Conclusions. The analysis confirms that sulphur chemistry is not yet properly understood. The D/H ratio, derived from DCO+/HCO+, DCN/HCN, and DNC/HNC ratios, points towards a low temperature chemistry. The detection of the rare species CCS confirms that GG Tau is a good laboratory to study the protoplanetary disk chemistry, thanks to its large disk size and mass.

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40

Wang, Shilong. "RESEARCH ON THE DYNAMIC EQUIPMENT-GROUPED IN DNC SYSTEM." Chinese Journal of Mechanical Engineering 36, no. 12 (2000): 81. http://dx.doi.org/10.3901/jme.2000.12.081.

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41

Kaul, I. K., D. R. Yadav, and J. P. Yadav. "Design of Interface Hardware and Software for DNC System." Defence Science Journal 44, no. 2 (January 1, 1994): 139–46. http://dx.doi.org/10.14429/dsj.44.4161.

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42

Lapointe, Stéphane, Luc Bélanger, Jean-François Giroux, and Bernard Filion. "Effects of Plant Cover Improvements for Nesting Ducks on Grassland Songbirds." Canadian Field-Naturalist 117, no. 2 (April 1, 2003): 167. http://dx.doi.org/10.22621/cfn.v117i2.678.

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Several islands located along the St. Lawrence River in southern Quebec have been used as natural pastureland by cattle for decades. Recently, a rest-rotation grazing system and dense nesting cover were established on four islands near Varennes to improve duck nesting conditions. The effects of these two plant cover improvements on the abundance of grassland songbirds were assessed through four treatments: (1) idle fields with no vegetation improvement but exclusion of cattle (IDLE), (2) improved pastures with seeding of forage plants for cattle (IMPP), (3) dense seeded nesting cover fields improved for ducks and where cattle were excluded (DNC), and (4) natural or unimproved pastures grazed by cattle after the duck nesting season (UIPP). The overall abundance of birds was similar among treatments before cover improvements as well as two years after. The abundance of Bobolinks (Dolichonyx oryzivorus) was significantly greater in DNC and UIPP two years after treatments while Red-winged Blackbirds (Agelaius phoeniceus) were more abundant in DNC and IDLE. Plant cover improvements had little impact on Savannah Sparrow (Passerculus sandwichensis) abundance. Furthermore, few annual or treatment-related changes were observed for less abundant species. On the short-term, duck nesting cover improvements in natural pastures did not have any major effect on grassland songbirds on Varennes islands.

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43

Liu, Yan. "Application and Study of CNC Network System Based on DNC." Advanced Materials Research 655-657 (January 2013): 1214–17. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1214.

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Three solutions to network CNC machines are introduced. Advantages and disadvantages are compared. Wireless network solution supports a wider range of CNC communications but easy be disturbed. Single port server solution ensure stable signal but hardware cost is high. TCP/IP solution is stable and reliability while most low-end CNCs do not have Ethernet ports. CNC quantity, port type, distance between CNCs and computers, required speed and cost should be considered to choose right solutions.

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Xun, Jing Bin, Gang Wang, Zhi Feng Qiao, Yan Yu Ding, Xiang Gui Ling, and Zhi Yuan Tang. "The Development of DNC Transfer Software Used in CNC Machine Tools." Applied Mechanics and Materials 141 (November 2011): 550–53. http://dx.doi.org/10.4028/www.scientific.net/amm.141.550.

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The network manufacturing technology of CNC machine tools can greatly increase their manufacturing efficiency, reduce production costs, enhance competitiveness and has significant practical significance. The paper studied the communication techniques used in CNC machine tool, took the programs developed in the practical application for example, described the process of preparing the application serial communication, completed the overall design of the structure of DNC system.

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Yi, Xiaolu. "Design and analysis of DNC production data acquisition and monitoring system." IOP Conference Series: Earth and Environmental Science 632 (January 14, 2021): 032058. http://dx.doi.org/10.1088/1755-1315/632/3/032058.

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Klemen, Nicholas, Raul Vizcardo, Linda Tran, and Nicholas P. Restifo. "Precocious Differentiation of Somatic and Pluripotent Stem Cells Bearing Pre-Arranged TCR." Blood 126, no. 23 (December 3, 2015): 847. http://dx.doi.org/10.1182/blood.v126.23.847.847.

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Abstract Adoptive cell transfer (ACT) of mutation-specific T lymphocytes may represent the future of immunotherapy for cancer. Current strategies utilize mature T cells isolated from tumors, but this approach may be hampered by limited persistence, advanced differentiation status, and exhaustion of transferred cells. Cellular rejuvenation is needed, and this could be accomplished through induced pluripotent stem cell (iPS) technology. IPS cells can be generated from various types of somatic cells using the four Yamanaka factors (Oct4, Sox2, Klf4, and c-Myc), and we have shown that iPS generated from T cells (T-iPS) retain their original TCR specificity upon re-differentiation into T cell lineage. With existing technology, tumor antigen-specific progenitor cells can be derived from T-iPS. These cells could have superior potential to engraft, proliferate, and persist for long periods of time. To explore this concept, we have generated a murine iPS cell line from our Pmel transgenic mouse model, in which T cells bear a pre-rearranged TCR specific for the melanoma antigen GP100. Differentiation in vitro employs the OP9-DL1 co-culture system. We characterize the DN1-DN4 stages by flow cytometry of T cell lineage differentiation markers, such as c-kit, CD3, CD4, CD8, CD25, TCRvb, and TCRvb13 (present in the Pmel transgene). To study somatic stem cell differentiation, we used lineage negative bone marrow from femurs of wild type C57BL/6 (WT) and Pmel TCR transgenic (Pmel) mice. After 10 days of culture, cells were harvested and analyzed. Frequencies of cells in the DN1-DN4 stages for WT were 2%, 41%, 55%, and 2%; for Pmel they were 5%, 31%, 39%, and 25%. Expression of CD3 in WT cells in the DN1/DN2 stage was 1%, and for the DN3/DN4 stage was 2%. In contrast, CD3 expression in Pmel cells was 85% for cells in DN1/DN2 and 95% for cells in DN3/DN4. To study pluripotent stem cell differentiation, we used WT embryonic stem cells (ES) and Pmel iPS. After 21 days of culture, cells were harvested and analyzed. The double positive compartment was 9% in WT ES and 30% in Pmel iPS; the double negative compartment was 60% and 37%. Frequencies of cells in DN1-DN4 stages for WT ES were 4%, 6%, 45%, and 45%; for Pmel they were 1%, 7%, 69%, and 23%. Expression of CD3 in WT cells in the DN1/DN2 stage was 1%, and for the DN3/DN4 stage was 13%. In contrast, CD3 expression in Pmel cells was 76% for cells in DN1/DN2 and 91% for cells in DN3/DN4. These data show for the first time that in vitro differentiation of pluripotent stem-derived progenitor cells bearing a pre-rearranged TCR will undergo precocious expression of the CD3 molecule and enhanced progression to DP stage as compared to WT controls. The pattern is consistent with that previously seen during in vitro differentiation of somatic stem cells. It appears that the presence of a pre-rearranged TCR is driving precocious development of T cells in vitro, regardless of whether the source of progenitors is from somatic (bone marrow) or pluripotent (ES/iPS) stem cells. Our ultimate goal is to intricately characterize the nature of iPS-derived T cells, and study their antitumor efficiency in vitro and in vivo, in order to evaluate their suitability for clinical use. Disclosures No relevant conflicts of interest to declare.

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Fang, Zhi Liang, Xing Jie Wu, and Bai Xin Fang. "Research and Application of Information Management for NC Equipment." Applied Mechanics and Materials 548-549 (April 2014): 1536–42. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1536.

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Focused on the operation management of equipment, the workflow of NC equipment informatization management was deeply analyzed in this article. The functional structure of equipment management system was studied here. And, the equipment information management system was developed based on B/S structure. The system was applied to manage the basic information, Spare parts and Maintenance of the NC Equipment by way of information and automation, and realize the traceability of equipment maintenance and spare parts management throughout the whole Life Cycle. The alete integration of the Equipment Information Management System and other system, such as DNC, MES and ERP, was realized. And the integrated system effectively promoted the information interaction between layer of enterprise, workshop and equipment.

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McCahill, Peter W., Erin E. Noste, AJ Rossman, and David W. Callaway. "Integration of Energy Analytics and Smart Energy Microgrid into Mobile Medicine Operations for the 2012 Democratic National Convention." Prehospital and Disaster Medicine 29, no. 6 (November 12, 2014): 600–607. http://dx.doi.org/10.1017/s1049023x14001198.

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AbstractIntroductionDisasters create major strain on energy infrastructure in affected communities. Advances in microgrid technology offer the potential to improve “off-grid” mobile disaster medical response capabilities beyond traditional diesel generation. The Carolinas Medical Center's mobile emergency medical unit (MED-1) Green Project (M1G) is a multi-phase project designed to demonstrate the benefits of integrating distributive generation (DG), high-efficiency batteries, and “smart” energy utilization in support of major out-of-hospital medical response operations.MethodsCarolinas MED-1 is a mobile medical facility composed of a fleet of vehicles and trailers that provides comprehensive medical care capacities to support disaster response and special-event operations. The M1G project partnered with local energy companies to deploy energy analytics and an energy microgrid in support of mobile clinical operations for the 2012 Democratic National Convention (DNC) in Charlotte, North Carolina (USA). Energy use data recorded throughout the DNC were analyzed to create energy utilization models that integrate advanced battery technology, solar photovoltaic (PV), and energy conservation measures (ECM) to improve future disaster response operations.ResultsThe generators that supply power for MED-1 have a minimum loading ratio (MLR) of 30 kVA. This means that loads below 30 kW lead to diesel fuel consumption at the same rate as a 30 kW load. Data gathered from the two DNC training and support deployments showed the maximum load of MED-1 to be around 20 kW. This discrepancy in MLR versus actual load leads to significant energy waste. The lack of an energy storage system reduces generator efficiency and limits integration of alternative energy generation strategies. A storage system would also allow for alternative generation sources, such as PV, to be incorporated. Modeling with a 450 kWh battery bank and 13.5 kW PV array showed a 2-fold increase in potential deployment times using the same amount of fuel versus the current conventional system.ConclusionsThe M1G Project demonstrated that the incorporation of a microgrid energy management system and a modern battery system maximize the MED-1 generators’ output. Using a 450 kWh battery bank and 13.5 kW PV array, deployment operations time could be more than doubled before refueling. This marks a dramatic increase in patient care capabilities and has significant public health implications. The results highlight the value of smart-microgrid technology in developing energy independent mobile medical capabilities and expanding cost-effective, high-quality medical response.McCahillPW, NosteEE, RossmanAJ, CallawayDW. Integration of energy analytics and smart energy microgrid into mobile medicine operations for the 2012 Democratic National Convention. Prehosp Disaster Med. 2014;29(6):1-8.

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Goto, Akira, Motohiko Nohmi, Takaki Sakurai, and Yoshiyasu Sogawa. "Hydrodynamic Design System for Pumps Based on 3-D CAD, CFD, and Inverse Design Method." Journal of Fluids Engineering 124, no. 2 (May 28, 2002): 329–35. http://dx.doi.org/10.1115/1.1471362.

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A computer-aided design system has been developed for hydraulic parts of pumps including impellers, bowl diffusers, volutes, and vaned return channels. The key technologies include three-dimensional (3-D) CAD modeling, automatic grid generation, CFD analysis, and a 3-D inverse design method. The design system is directly connected to a rapid prototyping production system and a flexible manufacturing system composed of a group of DNC machines. The use of this novel design system leads to a drastic reduction of the development time of pumps having high performance, high reliability, and innovative design concepts. The system structure and the design process of “Blade Design System” and “Channel Design System” are presented. Then the design examples are presented briefly based on the previous publications, which included a centrifugal impeller with suppressed secondary flows, a bowl diffuser with suppressed corner separation, a vaned return channel of a multistage pump, and a volute casing. The results of experimental validation, including flow fields measurements, were also presented and discussed briefly.

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Chen, Shao Bo, Zhi Dan Zheng, Qiu Sheng Yan, Zi Qiang Zhang, and Y. Li. "Control System Configuration for Grinding Machine with Two Moving Axes and One Circumrotating Axis Ganged Function." Key Engineering Materials 304-305 (February 2006): 474–77. http://dx.doi.org/10.4028/www.scientific.net/kem.304-305.474.

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By applying NC system with three axes ganged function to M1432 universal cylindrical grinding machine, a NC grinding machine with two moving axes and one circumrotating axis ganged function is designed and developed. Besides two moving axes ganged function, this machine has a special function of driving the form wheel dresser to circumrotate around the Y axis. Ordinary grinding machine with two axes ganged function can’t machine complicated parts such as seaming roll with steep gradient groove. But a grinding machine with this special unction can do this by precisely dressing the form wheel with various aspheric curves. With the set-in PLC function of NUM1020 NC system and the correlative parameters to be respectively setup, the new machine can be used to machine some complicated parts such as seaming roll. The system receives machining process codes which is pretreated by computer firstly and dresses the form wheel in DNC mode, then machines parts with the form wheel later.

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