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Search Results: 1 - 10 of 46577 matches for " TANG Feng "
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Fatty Acid Composition in Freeze-Dried Chinese Mitten Crabs (Eriocheir sinensis)  [PDF]
Lihong He, Feng Li, Junyong Tang
Open Journal of Marine Science (OJMS) , 2012, DOI: 10.4236/ojms.2012.23012
Abstract: Freeze drying is reported to be the best method of dehydration. Live fresh Chinese mitten crabs (Eriocheir sinensis) were freeze dried. The moisture content, rehydration ratio, and fatty acid composition of freeze-dried crabs were analysed. The applicability of using freeze drying to process high-value E. sinensis, so as to prolong the time duration of their storage and marketing, were discussed. After lyophilisation, the average moisture content was 6%. The physical properties (shape, size, and colour) of the musculature and viscera were maintained well during freeze drying. The rehydration ratio was 2.15 when rehydrated for 30 min at room temperature. The levels of polyunsaturated fatty acids, especially eicosapentaenoic acid and docosahexaenoic acid, were higher in female freeze-dried crabs than in male crabs. After full rehydration, the fatty acid composition of freeze-dried crabs showed no significant differences to that of frozen crabs after thawing. In conclusion, freeze drying can well preserve the physical properties of the edible parts and fatty acid composition of the viscera in high-value E. sinensis. Rehydration has no destruction of the nutritional value regarding to the fatty acid composition. Therefore, freeze drying is a suitable technique for the processing of high-value E. sinensis.
The Asymptotic Synchronization Analysis for Two Kinds of Complex Dynamical Networks
Ze Tang,Jianwen Feng
Advances in Mathematical Physics , 2012, DOI: 10.1155/2012/309289
Abstract: We consider a class of complex networks with both delayed and nondelayed coupling. In particular, we consider the situation for both time delay-independent and time delay-dependent complex dynamical networks and obtain sufficient conditions for their asymptotic synchronization by using the Lyapunov-Krasovskii stability theorem and the linear matrix inequality (LMI). We also present some simulation results to support the validity of the theories. 1. Introduction A complex dynamical network is a large set of interconnected nodes that represent the individual elements of the system and their mutual relationships. Owing to their immense potential for applications to various fields, complex networks have been intensively investigated in the past decade in areas as diverse as mathematics, physics, biology, engineering, and even the social sciences [1–3]. The synchronization problem for complex networks was first posed by Saber and Murray [4, 5] who also introduced a theoretical framework for their investigation by viewing them as the adjustments of the rhythms of their interaction states [6] and many different kinds of synchronization phenomena and models have also been discovered such as complete synchronization, phase synchronization, lag synchronization, antisynchronization, impulsive synchronization, and projective synchronization. Time delays are an important consideration for complex networks although these were usually ignored in early investigations of synchronization and control problems [6–11]. To make up for this deficiency, uniformly distributed time delays have recently been incorporated into network models [12–25] and Wang et al. [18] even considered networks with both delayed and nondelayed couplings and obtained sufficient conditions for asymptotic stability. Similarly, Wu and Lu [19] investigated the exponential synchronization of general weighted delay and nondelay coupled complex dynamical networks with different topological structures. There remains, however, much room for improvement in both the scope of the systems considered by Wang and Xu as well as in their methods of proofs. The main contributions of this paper are two-fold. Firstly, we present a more general model for networks with both delayed and nondelayed couplings and derive criteria for their asymptotical synchronization. Secondly, we apply the Lyapunov-Krasovskii theorem and the LMIs to ensure the inevitable attainment of the required synchronization. The rest of the paper is organized as follows. In Section 2, we present the general complex dynamical network model under
Adaptive Cluster Synchronization for Nondelayed and Delayed Coupling Complex Networks with Nonidentical Nodes
Ze Tang,Jianwen Feng
Abstract and Applied Analysis , 2013, DOI: 10.1155/2013/946243
Abstract:
A selection of nonempty compact convex set
Tang Feng-jun
Applied Mathematical Sciences , 2012,
Abstract:
Context-Aware Rate-Adaptive Beaconing for Efficient and Scalable Vehicular Safety Communication  [PDF]
Alvin Sebastian, Maolin Tang, Yanming Feng, Mark Looi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2012, DOI: 10.4236/ijcns.2012.59064
Abstract: Vehicular safety applications, such as cooperative collision warning systems, rely on beaconing to provide situational awareness that is needed to predict and therefore to avoid possible collisions. Beaconing is the continual exchange of vehicle motion-state information, such as position, speed, and heading, which enables each vehicle to track its neighboring vehicles in real time. This work presents a context-aware adaptive beaconing scheme that dynamically adapts the beaconing repetition rate based on an estimated channel load and the danger severity of the interactions among vehicles. The safety, efficiency, and scalability of the new scheme is evaluated by simulating vehicle collisions caused by inattentive drivers under various road traffic densities. Simulation results show that the new scheme is more efficient and scalable, and is able to improve safety better than the existing non-adaptive and adaptive rate schemes.
Progress and Prospect of Extreme Climate Events in Arid Northwest China  [PDF]
Xiangling Tang, Xin Lv, Feng Xue, Ying He
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.41004
Abstract:

Extreme climate events have significant influences on ecological systems and social economic systems. The global climate is becoming warmer and warmer, so extreme climate events will probably increase in both frequency and intensity, and the Northwest arid region of China is situated in the middle latitudes, all of which combine to make this area be come the most sensitive region to global climate change. For this reason, based on home and broad literature of research in extreme climate events, this paper mainly discusses those scientific problems which are waiting for resolved and we should strength work that those need research in future from extreme climatic events concept, their change regular, the discussion of theory reasons, and review from mode and simulate, as well as sum up some research results related ex treme climatic change.

Approximation Solution for TEHL of Bevel Gears in PSD  [PDF]
Yunhui Zhang, Zuoxin Li, Shuangshi Feng, Yongjiang Ma, Lei Tang
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.15014
Abstract:

To study the lubrication of the contact zone between half-shaft gears and planet gears in the power-split device (PSD), TEHL line contact of bevel gears in PSD is approximately computed based on a theory in which a bevel gear is equalized to an equivalent spur gear. In the calculation, the housing is taken as the reference system and the influence of the housing’s rotating on the lubrication is ignored. Film pressure, film thickness and temperature rise are analyzed under maximum load condition. This research provides some approximate reference data for the design of lubrication and cooling system of PSD.

Fuzzy Decision Method Applied in Action of Reactive Power Compensation Devices in Wind System  [PDF]
Xueming Li, Li Feng, Yi Tang, Yonghua Chen
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24039
Abstract: Frequent occurrence of large-scale cascading trip-off of wind turbine raises the concern about the decision process of ordered control of reactive power compensation devices. The theory of fuzzy multi-attribute decision making is adopted to ascertain the action sequence of reactive power compensation devices. First, a set of evaluation indexes including control sensitivity, regulation
margin, response time, response level and cost is set up, and fuzziness of the proposed qualitative indexes is introduced to make them comparable to the proposed quantitative indexes. Then a method to calculate fuzzy weight of each index is put forward for evaluating relative importance of the proposed indexes. Finally, the action sequence of reactive power compensation devices is determined through the theory of fuzzy compromise decision making. The case study shows that the proposed method is effective to obtain the action sequence of reactive power compensation device which correspond to experience.
Analysis of Influence Factors of Tide-Dominated Estuaries Based on Deposition Numerical Simulation  [PDF]
Tao Tang, Jixin Huang, Yanshu Yin, Wenjie Feng
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32012
Abstract: Tide-dominated estuaries sedimentary reservoir is a hot area of sedimentology research in recent years, and the important target of oil and gas exploration is one of the relatively few sedimentary systems. Based on the study of underground reservoirs, outcrop and modern sedimentation, scholars believe that the estuary is a sedimentary system formed by transgressive system tract, which is composed of a complex subfacies environment with obvious changes. Its formation is influenced by many factors. The purpose of this paper is to simulate the deposition process of estuaries by Delft-3D software, and to reveal the main controlling factors of estuarine reservoir formation. The factors are as follows. 1) The size of the river flow has a destructive effect on the formation of the estuarine sand bar in the estuary, but the effect is small. 2) Tidal energy plays a constructive role in estuarine sand bars in estuaries, and it is also the main force for the formation of estuarine reservoirs. 3) The composition of the sediments has an obvious influence on the formation of the estuarine reservoir, and the content of the mud is an important factor for the retention of the estuarine sand bar.
RNA Interference Mediated Silencing of Tissue Factor in Human Umbilical Vein Endothelial Cells  [PDF]
Xiaojuan Yin, Zhu Chen, Weiqin Zhou, Wen Tang, Zhichun Feng
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.85054
Abstract: Objective: To construct to silence tissue factor (TF) expression in Human Umbilical Vein Endothelial Cells (HUVECs) for providing evidence of the gene therapy and prevention of coagulation dysfunction in placental abruption (PA) neonates. Methods: Cultured HUVECs in vitro were divided into control group and PA group, each including non-prevention, scramble siRNA and TF-siRNA subgroups. pENTRTM/U6-shRNA/TF vector expressing TF were constructed and transfected into HUVECs. The mRNA expression of TF was tested with RT-PCR, and TF protein expression was detected with immunofluorescence staining. Results: Monolayer HUVECs with short-rod and short spindle shaped were adherent to the bottom, forming paving stone arrangement. The TF mRNA expression was significantly different between control group and PA group (P < 0.01) and among different subgroups (P < 0.01). In non-prevention subgroups, significant difference was observed in TF mRNA expression between control group and PA group (P < 0.05). Significant difference in TF mRNA expression was found in false-prevention subgroups (P < 0.05). The TF mRNA expression was
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