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Search Results: 1 - 10 of 104577 matches for " JianMin Zhang "
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Translational medicine in China
JianMin Zhang
Science China Life Sciences , 2012, DOI: 10.1007/s11427-012-4373-0
EPr Solution to a System of Matrix Equations  [PDF]
Changzhou Dong, Yuping Zhang, Jianmin Song
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2013, DOI: 10.4236/alamt.2013.34010

A square complex matrix \"\"is called \"\"if it can be written in the form \"\"with \"\"being fixed unitary and \"\" being arbitrary matrix in \"\". We give necessary and sufficient conditions for the existence of the \"\"solution to the system of complex matrix equation \"\"and present an expression of the \"\"solution to the system when the solvability conditions are satisfied. In addition, the solution to an optimal approximation problem is obtained. Furthermore, the least square \"\" solution with least norm to this system mentioned above is considered. The representation of such solution is also derived.

On Least Squares Solutions of Matrix Equation MZN=S  [PDF]
Yuping Zhang, Changzhou Dong, Jianmin Song
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2013, DOI: 10.4236/alamt.2013.34009
Abstract: Let \"\"be a given Hermitian matrix satisfying \"\". Using the eigenvalue decomposition of \"\", we consider the least squares solutions to the matrix equation \"\", with the constraint \"\".
Basic theories for strain localization analysis of porous media with rate dependent model
Hongwu Zhang,Jianmin Qin
Chinese Science Bulletin , 2005, DOI: 10.1360/982005-624
Abstract: This paper analyzes the interaction between two kinds of internal length scales when the rate dependent plasticity is introduced to a multiphase material model to study the dynamic strain localization phenomenon of saturated and partially saturated porous media. The stability analysis demonstrates that the enhanced porous media model preserves the well-posedness of the initial value problem for both axial and shear waves because an internal length scale parameter is introduced in the visco-plasticity model. On the other hand, the interaction between the length scale introduced by the rate dependent model and that naturally contained in the governing equations of fully and partially saturated model will take place. A basic method is presented to investigate the internal length scale of the multiphase porous media under the interaction of these two kinds of length scale parameters. Material stability analysis is carried out for a certain permeability from which the results of wave number domain with real wave speed are distinguished. A one dimensional example is given to illustrate the theoretical findings.
Load-balanced Route Discovery for Wireless Sensor Networks
Jianmin Zhang,Jian Li
Journal of Networks , 2010, DOI: 10.4304/jnw.5.9.1060-1067
Abstract: Wireless sensor networks have received academia research attention at present. A typically task in a wireless sensor network is that every sensor node senses its local environment and, upon request, sends the data of interest back to the sink node. The energy-constrain sensors in wireless sensor networks operate on limited batteries, so it is a very important issue to use energy efficiently and reduce power consumption. Most recent routing protocols tend to find the minimum energy cost path to lower energy usage for all routing paths, thus, they may lead to some of the nodes deplete their energy quickly. To maximize the network survivability by using equal energy among as many nodes as possible, this paper presents a novel load balancing multipath routing algorithm
Transliterated Word Identification and Application to Query Translation Mining  [PDF]
Jing Zhang, Lei Guo, Meiling Zhou, Jianmin Yao
Journal of Software Engineering and Applications (JSEA) , 2009, DOI: 10.4236/jsea.2009.22018
Abstract: Query translation mining is a key technique in cross-language information retrieval and machine translation knowl-edge acquisition. For better performance, the queries are classified into transliterated words and non-transliterated words based on transliterated word identification model, and are further channeled to different mining processes. This paper is a pilot study on query classification for better translation mining performance, which is based on supervised classification and linguistic heuristics. The person name identification gets a precision of over 97%. Transliterated word translation mining shows satisfactory performance.
Surfactant Surface Tension Effects on Promoting Hydrate Formation: An Experimental Study Using Fluorocarbon Surfactant (Intechem-01) + SDS Composite Surfactant  [PDF]
Lin Zhang, Shidong Zhou, Shuli Wang, Lei Wang, Jianmin Li
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.45A005

The investigation of surface tension is a very important task for gas hydrate studying. Surfactants can effectively reduce the surface tension, improve the gas storage capability of hydrate and increase the formation rate, shorten the induction time. The objective of this study were to obtain a better understanding of the role of surface tension on hydrate formation and build gas hydrate models involve surfactant. In this study it was highlighted that the surface tension of Intechem-01 + SDS composite surfactants in natural gas hydrate promotion system and the change rules at different temperatures, concentration and proportion. According to the results of experiment, the surface tension of composite surfactants decreased with the increase of Intechem-01. The best cooperating effect was observed in proportion (Intechem-01 content) of 0.6 - 0.7, where the surface tension was the lowest. In this proportion range, the composite surfactants showed the same effect to pure fluorine carbon surfactant. The study shown the surface tension of composite surfactants decreased with the rise of temperature, and they were in a linear relationship within a certain range. Surface tension of composite surfactants decreased with the increase of surfactant concentration, however, it was no longer decreased above critical micelle concentration (CMC). The fitting equation of surface tension with various factors has been obtained.

Network Hot Topic Discovery of Fuzzy Clustering Based on Improved Firefly Algorithm  [PDF]
Zhenpeng Liu, Jing Dong, Bin Zhang, Mengjie He, Jianmin Xu
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.68001
Abstract: The existing fuzzy clustering algorithm (FCM) is sensitive to the initial center point. And simple clustering of distance can neither discovery hot topics on the Network accurately nor solve the problem of semantic diversity in Chinese. Aiming at these problems, an improved fuzzy clustering method based on dynamic adaptive step firefly algorithm (FA) was proposed. The clustering center was optimized by improved FA, and the FCM was used to complete the final clustering. First, the step length was adjusted adaptively in the current iteration, and the relationship between fireflies was established according to text similarity, then the topic influence value was applied to fuzzy clustering algorithm to improve fitness function optimization. In this process the topic was categorized into the closest class to the cluster center, which can reduce the impact of topic variation. Finally, according to the level of influence value got hot topics. By collecting real data from Sina micro-blog, the effectiveness of the algorithm was verified by experiments, and the accuracy of topic discovery was improved greatly.
Paleogeomorphic Influence on Facies Characteristics and Reservoir Prediction in Lacustrine Basin
—By Taking Cretaceous Reservoirs in the Western Slope of SL Basin, China as an Example

Longtao Cui, Qianping Zhang, Xue Liu, Ming Yang, Jianmin Zhu
Open Journal of Yangtze Oil and Gas (OJOGas) , 2019, DOI: 10.4236/ojogas.2019.42009
Abstract: The West Slope of SL Basin, China, mainly targets on lithologic reservoirs for oil and gas. The paleogeomorphology and provenance direction analysis has great significance for predicting the type and distribution of sand body. According to the analysis of well logging, core and seismic data, braided delta and gravity sediment mainly develop in the study area. A backs tripping method is used to reconstruct the topography of Qingshankou to Yaojia Formation, Cretaceous. The West Slope is mainly controlled by two slope belts in Qingshankou Formation, with the width of upper slope 12 - 18 km and the gradient 0.7 - 0.8 degrees, the width of lower slope 13 - 15 km and the gradient 1.0 degrees. The West Slope is controlled by a single slope belt in Yaojia Formation, with the lower slope width of 13 - 16 km and the gradient 0.4 degrees. The relationship between the slope belt, provenance direction and sand body distribution is analyzed, and result shows that the combination of upper and lower slope controls the distribution of reservoir types, and the provenance supply rate controls the scale of sand body. The gravity flow develops when the provenance direction is parallel to slope direction, and the slope becomes transporting channel in vertical to provenance direction. The paleogeomorphology, lake level and provenance direction are the main control factors of sand body in West Slope.
Isolation and expression characterization of CBF2 in vitis amurensis with stress  [PDF]
Chang Dong, Jianmin Tao, Meng Zhang, Zhiying Yu, Bailin Wang, Binhua Cai, Zhen Zhang, Yang Qin
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.49062

The transcription factor VaCBF2, which interacts with C-repeat/DRE and its promoter, was isolated from Vitis amurensis. The VaCBF2 amino acid sequence contained a conserved AP2 domain of 56 amino acids and a potential nuclear localization sequence. The sequence of VaCBF2 showed a high level of homology with other CBF2 family members. Phylogenetic analysis showed that the amino acid sequences may be CBF2 proteins with evolutionary relationship. Quantitative reverse-transcription polymerase chain reaction analysis indicated that the expression of VaCBF2 gene in tissues (roots, stems, leaves, and petioles) was induced by low temperature, high salinity, and application of abscisic acid and salicylic acid in a time-dependent manner but to different extents in the cold-hardy V. amurensis and the less cold-hardy Vitis vinifera. The presence of cis-elements such as MYC and ABRE in VaCBF2 promoter further confirmed that this promoter was a component of the CBF transduction pathway involved in plant response to multiple stresses.

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