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Search Results: 1 - 10 of 45797 matches for " YUAN Yong "
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Research on Urban Community Facilities Safety Governance—Based on the Overall Perspective  [PDF]
Yanping Liu, Zhixiang Yuan, Yong Wang
World Journal of Engineering and Technology (WJET) , 2017, DOI: 10.4236/wjet.2017.53B005
Abstract:
Community facilities accidents happen every year in many cities of China, which has been an important issue in academic circles. The purpose of this study is to suggest the direction of universal design for the prevention of community facilities accidents. In this paper, from the overall angle, the impact factors of the urban community service facilities safety were analyzed. Then, based on the integrated governance theory, from such aspects as engineering and non-engineering disaster reduction, the governance measures were explored.
Analysis of the arginine biosynthetic gene cluster argCJBDFR of Corynebacterium crenatum  [PDF]
Haitao Jiao, Yong Yuan, Yonghua Xiong, Xuelan Chen
Journal of Biomedical Science and Engineering (JBiSE) , 2011, DOI: 10.4236/jbise.2011.41009
Abstract: Objective: Corynebacterium crenatum AS1.542, a Gram-positive bacterium and indigenous nonpatho-genic corynebacteria, is widely exploited for the in-dustrial production of amino acids. The objective of this paper is to clarify the genetic information of the arginine biosynthetic pathway, and further more contribute to the improvement of arginine produc-tion. Methods: Polymerase chain reaction (PCR) technology was employed for obtaining the arginine biosynthetic gene sequence, and softwares eg. Laser-gene, BPROM, RNAshapes were used for the analysis of obtained sequences. Results: Arginine biosynethetic gene cluster of C. crenatum, comprising argJ, argB, argD, argF, argR and part of argC, has been ampli-fied and sequenced. The gene order has been estab-lished as argCJBDFR, with a entire length of 6.08kb. Conclusion: An internal promoter was found in the upstream of argB gene, four argBDFR ORFs are lo-cated in a same transcription unit, and the tran-scripiton termination of argC gene is irrelevant with the rho-factor. Comparison with ornithine acetyl-transferase (coded by argJ gene) from C. glutamate, ornithine acetyltransferase from C. crenatum also belongs to the monofunctional enzymes.
Least Squares Hermitian Problem of Matrix Equation (AXB, CXD) = (E, F) Associated with Indeterminate Admittance Matrices  [PDF]
Yanfang Liang, Shifang Yuan, Yong Tian, Mingzhao Li
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.66101
Abstract: For ACmΧn, if the sum of the elements in each row and the sum of the elements in each column are both equal to 0, then A is called an indeterminate admittance matrix. If A is an indeterminate admittance matrix and a Hermitian matrix, then A is called a Hermitian indeterminate admittance matrix. In this paper, we provide two methods to study the least squares Hermitian indeterminate admittance problem of complex matrix equation (AXB,CXD)=(E,F), and give the explicit expressions of least squares Hermitian indeterminate admittance solution with the least norm in each method. We mainly adopt the Moore-Penrose generalized inverse and Kronecker product in Method I and a matrix-vector product in Method II, respectively.
Adaptation fermentation of Pichia stipitis and combination detoxification on steam exploded lignocellulosic prehydrolyzate  [PDF]
Jun-Jun Zhu, Qiang Yong, Yong Xu, Shang-Xing Chen, Shi-Yuan Yu
Natural Science (NS) , 2009, DOI: 10.4236/ns.2009.11009
Abstract: Yeast Pichia stipitis CBS 5776 was developed through adaptation fermentation step by step in steam exploded corn stover prehydrolyzate because high concentration of weak acids and other inhibitors present in the prehydrolyzate could degrade the fermentability. However, the adaptability of Pichia stipitis CBS 5776 in the prehydrolyzate was so limited that steam strip-ping and overliming were applied to remove these inhibitors from it. Corn stover was steam exploded; the filtrate of steam exploded corn stover was hydrolyzed with dilute sulfuric acid, and then the acid hydrolyzate was detoxified and fermented by Pichia stipitis CBS 5776. Steam stripping could remove volatile com-pounds from the acid hydrolyzate and the fil-trate. At a steam stripping time of 120min, 81% acetic acid and 59% formic acid were removed from the acid hydrolyzate, 77% acetic acid and 45% formic acid were removed from the filtrate, while furfural was stripped off completely from the acid hydrolyzate and the filtrate. Overliming could reduce the contents of furfural and phe-nolics present in the acid hydrolyzate, however, sugars, especially pentoses, were also removed partially. It was necessary to detoxify the acid hydrolyzate in order to ferment the sugars to ethanol. Acid hydrolyzate detoxified with a combination of steam stripping for 120 min and overliming at pH11 and 60℃ for 90 min, its fer-mentability was significantly improved. Xylose was consumed nearly completely in 24h with an ethanol yield of 15.92g/l, 80.34% of theoretical.
Spiral-wave dynamics in excitable medium with excitability modulated by rectangle wave

Yuan Guo-Yong,

中国物理 B , 2011,
Abstract: We numerically study the dynamics of spiral waves in the excitable system with the excitability modulated by a rectangle wave. The tip trajectories and their variations with the modulation period T are explained by the corresponding spectrum analysis. For a large T, the external modulation leads to the occurrence of more frequency peaks and these frequencies change with the modulation period according to their specific rules, respectively. Some of the frequencies and a primary frequency f1 determine the corresponding curvature periods, which are locked into rational multiplies of the modulation period. These frequency-locking behaviours and the limited life-span of the frequencies in their variations with the modulation period constitute many resonant entrainment bands in the T axis. In the main bands, which follow the relation T/T12=m/n, the size variable Rx of the tip trajectory is a monotonic increasing function of T. The rest of the frequencies are linear combinations of the two ones. Due to the complex dynamics, many unique tip trajectories appear at some certain T. We find also that spiral waves are eliminated when T is chosen from the end of the main resonant bands. This offers a useful method of controling the spiral wave.
8-(4-Nitrobenzyloxy)quinoline
Yuan Zhang,Yong Hua Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809033212
Abstract: In the title compound, C16H12N2O3, the planar quinoline ring system [maximum deviation = 0.025 (3) ] is oriented at a dihedral angle of 61.76 (7)° with respect to the benzene ring. In the crystal structure, intermolecular C—H...O interactions link the molecules into chains parallel to the b axis. π–π contacts between the quinoline rings [centroid–centroid distance = 3.623 (1) ] may further stabilize the structure.
4-[(2-Hydroxy-1-naphthyl)(piperidin-1-yl)methyl]benzonitrile
Yuan Zhang,Yong Hua Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809033728
Abstract: In the title compound, C23H22N2O, obtained from the condensation reaction of 4-formylbenzonitrile, 2-naphthol and piperidine, the dihedral angle between the naphthalene ring system and the benzene ring is 75.31 (4)°. The piperidine ring adopts a chair conformation. The crystal structure is stabilized by intermolecular C—H...N hydrogen bonds, which link the molecules into centrosymmetric dimers. An intramolecular O—H...N hydrogen bond is also present.
2-Benzyl-1,3-diphenyl-2,3-dihydro-1H-naphtho[1,2-e][1,3]oxazine
Yuan Zhang,Yong Hua Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809025811
Abstract: In the title compound, C31H25NO, the oxazine ring adopts a half-chair conformation. The dihedral angles between the phenyl rings and the naphthyl ring system are 70.89 (8), 37.34 (10) and 9.42 (10)°. The crystal structure is stabilized by an aromatic π–π stacking interaction, with a centroid–centroid distance of 3.879 (3) .
Retrospective Cohort Analysis of Chest Injury Characteristics and Concurrent Injuries in Patients Admitted to Hospital in the Wenchuan and Lushan Earthquakes in Sichuan, China
Xi Zheng, Yang Hu, Yong Yuan, Yong-Fan Zhao
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0097354
Abstract: Background The aim of this study was to compare retrospectively the characteristics of chest injuries and frequencies of other, concurrent injuries in patients after earthquakes of different seismic intensity. Methods We compared the cause, type, and body location of chest injuries as well as the frequencies of other, concurrent injuries in patients admitted to our hospital after the Wenchuan and Lushan earthquakes in Sichuan, China. We explored possible relationships between seismic intensity and the causes and types of injuries, and we assessed the ability of the Injury Severity Score, New Injury Severity Score, and Chest Injury Index to predict respiratory failure in chest injury patients. Results The incidence of chest injuries was 9.9% in the stronger Wenchuan earthquake and 22.2% in the less intensive Lushan earthquake. The most frequent cause of chest injuries in both earthquakes was being accidentally struck. Injuries due to falls were less prevalent in the stronger Wenchuan earthquake, while injuries due to burial were more prevalent. The distribution of types of chest injury did not vary significantly between the two earthquakes, with rib fractures and pulmonary contusions the most frequent types. Spinal and head injuries concurrent with chest injuries were more prevalent in the less violent Lushan earthquake. All three trauma scoring systems showed poor ability to predict respiratory failure in patients with earthquake-related chest injuries. Conclusions Previous studies may have underestimated the incidence of chest injury in violent earthquakes. The distributions of types of chest injury did not differ between these two earthquakes of different seismic intensity. Earthquake severity and interval between rescue and treatment may influence the prevalence and types of injuries that co-occur with the chest injury. Trauma evaluation scores on their own are inadequate predictors of respiratory failure in patients with earthquake-related chest injuries.
Overlapping Community Detection in Complex Networks using Symmetric Binary Matrix Factorization
Zhong-Yuan Zhang,Yong Wang,Yong-Yeol Ahn
Computer Science , 2013, DOI: 10.1103/PhysRevE.87.062803
Abstract: Discovering overlapping community structures is a crucial step to understanding the structure and dynamics of many networks. In this paper we develop a symmetric binary matrix factorization model (SBMF) to identify overlapping communities. Our model allows us not only to assign community memberships explicitly to nodes, but also to distinguish outliers from overlapping nodes. In addition, we propose a modified partition density to evaluate the quality of community structures. We use this to determine the most appropriate number of communities. We evaluate our methods using both synthetic benchmarks and real world networks, demonstrating the effectiveness of our approach.
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