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31 results on '"Ma, Songlin"'

5. Constrained Motion Planning for Safe Operation of a Vision-Based Laser Cutting Manipulator

Author

Ma, Songlin, Zabihifar, Seyedhassan, Montazeri, Allahyar, Ma, Songlin, Zabihifar, Seyedhassan, and Montazeri, Allahyar

Abstract

Motion planning plays an important role in autonomous manipulators, especially when operating in confined spaces with various constraints. The problem is particularly challenging in unstructured and cluttered environments where there is no a priori information on the surroundings available. In this paper, a method for constrained motion planning of a hydraulically actuated manipulator is proposed within the context of laser cutting applications in nuclear decommissioning. This method enables the robot to move the end-effector to follow the surface of an inspected workpiece, based on the assumption that cutting points are generated from a 3D vision system. The algorithm works in two phases: in the first step, the ConstrainedRRT* motion planning algorithm computes a collision-free path for the manipulator to reach the initial cutting point above the surface of the target object whilst respecting robot kinematic constraints. In the second step, a laser cutting path is generated such that it satisfies the constraints imposed by the user and avoids singularities. The results indicate that the proposed method is robust against a degraded camera with 40 dB SNR under a 10 Gy/h radiation dose. The algorithm's performance is also compared against some well-known approaches in terms of planning time and computational complexity.

Published
2024

7. Structural prediction of porcine sialoadhesin V-set Ig-like domain sheds some light on its role in porcine reproductive and respiratory syndrome virus (PRRSV) infection

Author

Jie HOU,Rui LI,Hongfang MA,Songlin QIAO,Gaiping ZHANG

Subjects
PRRSV, porcine sialoadhesin, V-set Ig-like domain, Drosophila S2 cell, crystallization, Agriculture (General), S1-972
Abstract

Porcine reproductive and respiratory syndrome (PRRS) is characterized by reproductive failures in sows and respiratory diseases in pigs of all ages. PRRS virus (PRRSV) is its causative agent and has caused huge economic losses in the swine industry. Porcine sialoadhesin (pSn) is a putative receptor of PRRSV. Previous studies have shown that a pSn V-set Ig-like domain is significant in PRRSV infection. However, its structural details are not fully known, hindering our deep understanding of PRRSV infection. In this study, we successfully cloned, expressed and purified the pSn V-set Ig-like domain in Drosophila S2 cells. Then we tried to crystallize the target protein and predicted its structure. This will establish the foundation for the further structural study of pSn, deepen our understanding of the invasion mechanism of PRRSV, and support the structural information for the development of clinical drugs and vaccines against PRRSV.

Published
2016
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8. Cloning, characterization of two female-specific AFLP markers and development of PCR-based sex identification method for the half-smooth tongue sole Cynoglossus semilaevis

Author

Hongyu MA, Songlin CHEN, Jing LI, Jin-Zhen BI, Tianjun XU

Subjects
AFLP, Cynoglossus semilaevis, Female-specific marker, SCAR, Molecular sexing, Zoology, QL1-991
Abstract

Two female-specific AFLP (amplified fragment length polymorphism) markers (named CseF464 and CseF136) were isolated by using one selective primer combination (E-AGC/M-CTG) from the genomic DNA of 20 females and 20 males of the half-smooth tongue sole Cynoglossus semilaevis. Both the markers were re-amplified, recovered from the agarose gels, cloned and sequenced. Bioinformatics analysis indicated that the length of the two markers were 468bp and 134bp, respectively, and the sequences showed no similarity to each other, as well as to the known sequences deposited in the GenBank database using BLASTn. Two pairs of SCAR (sequence characterized amplified regions) primers were designed based on the sequences of the two female-specific markers. Furthermore, PCR-based genetic sex identification method was developed in Cynoglossus semilaevis. A specific fragment was amplified in all females but not in any males by using these SCAR primers on the initial 20 female and 20 male individuals of Cynoglossus semilaevis. The feasibility of the two SCAR primer pairs was confirmed in additional 100 individuals (50 females and 50 males). This allowed for reliable, rapid molecular identification of genetic sex of the species, genetic mapping on the sex chromosomes and better understanding of the sex determination and sex differentiation in the half-smooth tongue sole [Current Zoology 55 (4): 309–314, 2009].

Published
2009

11. H�jek-R�nyi Type Inequalities and Strong Law of Large Numbers for NOD Sequences

Author

Ma Songlin

Subjects
Discrete mathematics, Numerical Analysis, Pure mathematics, Inequality, Applied Mathematics, media_common.quotation_subject, Type (model theory), Stability (probability), Computer Science Applications, Orthant, Corollary, Computational Theory and Mathematics, Law of large numbers, Analysis, Mathematics, media_common
Abstract

In the paper, we get the precise results of H ´ ajek-R´ enyi type inequalities for the partial sums of negatively orthant depende nt sequences, which improve the results of Theorem 3.1 and Corollary 3.2 in Kim (2006). In addition, the Marcinkiewicz type strong law of large numbers is obtained. At last, the strong stability for weighted sums o f negatively orthant dependent sequences is discussed.

Published
2013

14. Evaluation on Sustainable Food Security in Henan against the Background of Low-Carbon Economy

Author

Li Ruihong and Ma Songlin

Subjects
education.field_of_study, Food security, business.industry, Population, Sustainable Food Security, Sustainable Agriculture Innovation Network, Agriculture, General Medicine, Low-carbon economy, Energy consumption, Agricultural economics, Food Security, Sustainable agriculture, Economics, Food systems, Low-carbon Economy, business, education, Factor Analysis
Abstract

New requirements for sustainable food security are set against the background of Low-Carbon Economy (LCE). LCE Influences on sustainable food security include “Minimization” principle and “Recycling” principle. The present situation of sustainable food security in Henan Province is analyzed quantitatively. Preliminary conclusion is that, energy consumption in grain production and proportion of agricultural population in Henan Province is relatively large, the level of deep processing of agricultural products is too limited. On this basis, suggestions on sustainable food safety are given, such as the development of water-saving agriculture, reduction of energy consumption in agriculture and so on.

Published
2010
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16. Complete convergence and complete moment convergence for widely orthant-dependent random variables.

Author

Ding, Yang, Wu, Yi, Ma, Songlin, Tao, Xinran, and Wang, Xuejun

Subjects
STOCHASTIC convergence, MOMENTS method (Statistics), RANDOM variables, MATHEMATICAL equivalence, STOCHASTIC processes
Abstract

In this paper, we first establish the complete convergence for weighted sums of widely orthant-dependent (WOD, in short) random variables by using the Rosenthal type maximal inequality. Based on the complete convergence, we further study the complete moment convergence for weighted sums of arrays of rowwise WOD random variables which is stochastically dominated by a random variableX. The results obtained in the paper generalize the corresponding ones for some dependent random variables. [ABSTRACT FROM AUTHOR]

Published
2017
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