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Improved ant colony-based multi-constrained QoS energy-saving routing and throughput optimization in wireless Ad-hoc networks

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The Journal of China Universities of Posts and Telecommunications 2014年第1期21卷 43-53,59页

作者： WANG Ya-li SONG mei WEI Yi-fei WANG Ying-he WANG xiao-jun School of Electronic Engineering Beijing University of Posts and Telecommunications Chinese Academy of Science Shanghai Institute of Microsystem and Information Technology School of Electronic Engineering Dublin City University

In order to establish a route supporting multi-constrained quality of service（QoS）, increase network throughput and reduce network energy consumption, an improved ant colony-based multi-constrained QoS energy-saving routing algorithm（IAMQER） is proposed. The ant colony algorithm, as one of the available heuristic algorithms, is used to find the optimal route from source node to destination node. The proposed IAMQER algorithm, which is based on the analysis of local node information such as node queue length, node forwarding number of data packets and node residual energy, balances the relationship between the network throughput and the energy consumption, thus improving the performance of network in multi-constrained QoS routing. Simulation results show that this IAMQER algorithm can find the QoS route that reduce average energy consumption and improves network packet delivery ratio under the end-to-end delay and packet loss ratio constraints.

关键词： wireless Ad-hoc networks multi-constrained QoS routing ant colony algorithm energy-saving throughput optimization

Elimination of Anti-spiral Waves by Local Inhomogeneity in Oscillatory Systems

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Chinese Journal of Chemical Physics 2008年第6期21卷 575-580页

作者： Fu-cheng Liu xiao-fei Wang College of Physics Science & Technology Hebei University Baoding 071002 China

Anti-spiral waves are controlled in an oscillatory system by using a local inhomogeneity. The inhomogeneity acts as a wave source, and gives rise to the propagating plane waves, tt is found that there is a critical pacemaking domain size below which no wave will be created at all. Two types of ordered waves （target waves and traveling waves） are created depending on the geometry of the local inhomogeneity. The competition between the anti-spiral waves and the ordered waves is discussed. Two different competition mechanisms were observed, which are related to the ordered waves obtained from different local inhomogeneities. It is found that traveling waves with either lower frequency or higher frequency can both eliminate the anti-spiral waves, while only the target waves with lower absolute value of frequency can eliminate the anti-spiral waves. This method also applies to outwardly rotating spiral waves. The control mechanism is intuitively explained and the control method is easily operative.

关键词： Anti-spiral wave Traveling wave Inhomogeneity Oscillatory system

Influence of Annealing Temperature on the Properties of TiO_2 Films Annealed by ex situ and in situ TEM

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Journal of Wuhan University of Technology(Materials Science) 2012年第6期27卷 1014-1019页

作者：彭堂超 xiao Xiangheng REN Feng XU Jinxia ZHOU xiaodong mei fei 蒋昌忠 School of Physics and Technology Wuhan University Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics School of Electrical&Electronic Engineer Hubei University of TechnologyWuhan 430068China

TiO2 thin films were deposited on quartz substrates by DC reactive magnetron sputtering of a pure Ti target in Ar/O2 plasma at room temperature. The TiO2 films were annealed at different temperatures ranging from 300 to 800 ℃ in a tube furnace under flowing oxygen gas for half an hour each. The effect of annealing temperatures on the structure, optical properties, and morphologies were presented and discussed by using X-ray diffraction, optical absorption spectrura, and atomic force microscope. The films show the presence of diffraction peaks from the （101）, （004）, （200） and （105） lattice planes of the anatase TiO2 lattice. The direct band gap of the annealed films decreases with the increase of annealing temperature. While, the roughness of the films increases with the increases of annealing temperature, and some significant roughness changes of the TiO2 film surfaces were observed after the annealing temperature reached 800 ℃. Moreover, the influences of annealing on the microstructures of the TiO2 film were investigated also by in situ observation in transmission electron microscope.

关键词： TiO2 films DC reactive magnetron sputtering anatase in situ TEM annealing

Symplectic system based analytical solution for bending of rectangular orthotropic plates on Winkler elastic foundation

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Acta Mechanica Sinica 2011年第6期27卷 929-937页

作者： Wei-An Yao xiao-fei Hu Feng xiao State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology 116024 Dalian China Department of Computer Science Dalian Medical University 116044 Dalian China

This paper analyses the bending of rectangular orthotropic plates on a Winkler elastic *** definition of symplectic inner product and symplectic space formed by generalized displacements establish dual variables and dual equations in the symplectic *** operator matrix of the equation set is proven to be a Hamilton operator *** of variables and eigenfunction expansion creates a basis for analyzing the bending of rectangular orthotropic plates on Winkler elastic foundation and obtaining solutions for plates having any boundary *** is discussion of symplectic eigenvalue problems of orthotropic plates under two typical boundary conditions,with opposite sides simply supported and opposite sides *** equations of eigenvalues and symplectic eigenvectors in analytical form *** solutions using two examples are presented to show the use of the new methods described in this *** verify the accuracy and convergence,a fully simply supported plate that is fully and simply supported under uniformly distributed load is used to compare the classical Navier method,the Levy method and the new *** show that the new technique has good accuracy and better convergence speed than other methods,especially in relation to internal forces.A fully clamped rectangular plate on Winkler foundation is solved to validate application of the new methods,with solutions compared to those produced by the Galerkin method.

关键词： Orthotropic plate Symplectic space Winklerelastic foundation Analytical solution

The Products of Three Theta Functions and the General Cubic Theta Functions

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Acta Mathematica Sinica,English Series 2010年第6期26卷 1115-1124页

作者： xiao mei YANG Department of Mathematics East China Normal University Shanghai 200241 P. R. China

In this paper we establish two theta function identities with four parameters by the theory of theta functions. Using these identities we introduce common generalizations of Hirschhorn-Garvan-Borwein cubic theta functions, and also re-derive the quintuple product identity, one of Ramanujan＇s identities, Winquist＇s identity and many other interesting identities.

关键词： Jacobi theta function quintuple product identity Winquist's identity Ramanujan identity

Panax quinquefolium saponin attenuates cardiomyocyte apoptosis induced by thapsigargin through inhibition of endoplasmic reticulum stress

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Journal of Geriatric Cardiology 2015年第5期12卷 540-546页

作者： Mi LIU mei XUE xiao-Reng WANG Tian-Qi TAO fei-fei XU Xiu-Hua LIU Da-Zhuo SHI Department of Pathophysiology Chinese PLA General Hospital Beijing China Xiyuan Hospital China Academy of Chinese Medical Sciences Beijing China

Background Endoplasmic reticulum （ER） stress-related apoptosis is involved in the pathophysiology of many cardiovascular diseases, and Panax quinquefolium saponin （PQS） is able to inhibit excessive ER stress-related apoptosis of cardiomyocytes following hypoxia/reoxygenation and myocardial infarction. However, the pathway by which PQS inhibits the ER stress-related apoptosis is not well understood. To further investigate the protective effect of PQS against ER stress-related apoptosis, primary cultured eardiomyocytes were stimulated with thapsigargin （TG）, which is widely used to model cellular ER stress, and it could induce apoptotic cell death in sufficient concentration. Methods Primary cultured cardiomyocytes from neonatal rats were exposed to TG （1 μmol/L） treatment for 24 h, following PQS pre-treatment （160 μg/mL） for 24 h or pre-treatment with small interfering RNA directed against protein kinase-like endoplasmic reticulum kinase （Si-PERK） for 6 h. The viability and apoptosis rate of cardiomyocytes were detected by cell counting kit-8 and flow cytometry respectively. ER stress-related protein expression, such as glucose-regulated protein 78 （GRP78）, calreticulin, PERK, eukaryotic translation initiation factor 2α （elF2c0, activating transcription factor 4 （ATF4）, and C/EBP homologous protein （CHOP） were assayed by western blotting. Results Both PQS pre-treatment and PERK knockdown remarkably inhibited the cardiomyocyte apoptosis induced by TG, increased cell viability, decreased phosphorylation of both PERK and eIF2α, and decreased protein levels of both ATF4 and CHOP. There was no statistically significant difference between PQS pre-treatment and PERK knockdown in the cardioprotective effect. Conclusions Our data indicate that the PERK-eIF2α-ATF4-CHOP pathway of ER stress is involved in the apoptosis induced by TG, and PQS might prevent TG-induced cardiomyocyte apoptosis through a mechanism involving the suppression of this pathway. These findings provide nov

关键词： Cardiomyocyte apoptosis Endoplasmic reticulum stress Panax quinqueJblium saponin Thapsigargin

Acoustic characterization of hydrate formation and decomposition in clay-bearing sediments

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Petroleum Science 2024年第4期21卷 2830-2838页

作者： Yi-Jian Zhu xiao-mei Yang Xing Huang Hao Li xiao-Hui Wang Yi-fei Sun Peng xiao Chang-Yu Sun Guang-Jin Chen State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of PetroleumBeijing102249China

Understanding the acoustic characteristics of hydrates in various sediments is crucial for hydrate resource detection and safe and efficient exploitation,as hydrate occurrence patterns vary greatly in different *** this work,sediments with different bentonite contents,water saturations,and types were prepared to investigate the characteristics of P-wave velocity(reflecting the magnitude of hydrate saturation in the sediment)and amplitude(reflecting the degree of hydrate-sediment cementation)during hydrate formation and *** hydrate formation,the P-wave velocity and amplitude have similar *** clay content increases,the P-wave velocity increase rates *** the other hand,the increased rate of P-wave velocity slows down with the increase of water saturation in the clay-bearing *** various types of sediment shows that the water absorption and swelling of bentonite reduce the pore space,speeding up the cementation of the hydrate with the sediment and increasing P-wave velocity at a faster *** between P-wave velocity and hydrate saturation is strongly related to sediment type,clay content,and water *** rapidly decreasing amplitude in the early stage of hydrate depressurization indicates that hydrate in clay-bearing sediments is weakly cemented to the sediments,which is prone to stratigraphic *** findings of this study offer guidance for hydrate resource assessments in clay-bearing sediments as well as geologic risk estimations during hydrate mining.

关键词： Gas hydrate Bentonite Illite P-wave velocity Amplitude

Dicer Deletion in Astrocytes Inhibits Oligodendroglial Differentiation and Myelination

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Neuroscience Bulletin 2021年第8期37卷 1135-1146页

作者： Kun Liu Bin Yu Jing-fei Chen Rui-Xue Li Lin Chen Shu-Yu Ren fei Wang Feng mei Lan xiao Department of Histology and Embryology Chongqing Key Laboratory of NeurobiologyBrain and Intelligence Research Key Laboratory of Chongqing Education CommissionThird Military Medical University(Army Medical University)Chongqing400038China Department of Neurosurgery 2nd affiliated HospitalThird Military Medical University(Army Medical University)Chongqing400038China

Increasing evidence has shown that astrocytes are implicated in regulating oligodendrocyte myelination,but the underlying mechanisms remain largely *** understand whether microRNAs in astrocytes function in regulating oligodendroglial differentiation and myelination in the developing and adult CNS,we generated inducible astrocyte-specific Dicer conditional knockout mice(hGFAP-CreERT;Dicer fl/fl).By using a reporter mouse line(mT/mG),we confirmed that hGFAP-CreERT drives an efficient and astrocyte-specific recombination in the developing CNS,upon tamoxifen treatment from postnatal day 3(P3)to *** Dicer deletion in astrocytes resulted in inhibited oligodendroglial differentiation and myelination in the developing CNS of Dicer cKO mice at P10 and P14,and did not alter the densities of neurons or axons,indicating that Dicer in astrocytes is required for oligodendrocyte ***,the Dicer deletion in astrocytes at P3 resulted in impaired spatial memory and motor coordination at the age of 9 *** understand whether Dicer in astrocytes is also required for remyelination,we induced Dicer deletion in 3-month-old mice and then injected lysolecithin into the corpus callosum to induce *** Dicer deletion in astrocytes blocked remyelination in the corpus callosum 14 days after induced ***,our results indicate that Dicer in astrocytes is required for oligodendroglia myelination in both the developing and adult CNS.

关键词： White matter Myelination MicroRNA GFAP MT/mG Microglia Oligodendrocyte Demyelination Remyelination

Hot Compress with Chinese Herbal Salt Packets Reducing PICC Catheter Complications: A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2018年第11期24卷 809-814页

作者： WU xiao-fei YU Ya-juan YING Ling-mei TAN Wei-fen ZHAN xiao-yan WANG Ling-cong Central Venous Catheter Maintenance Center the First Affiliated Hospital of Zhejiang Chinese Medical University Department of ICU the First Affiliated Hospital of Zhejiang Chinese Medical University

Objective： To explore the preventive effect of applying hot compress with Chinese herbal salt packets（CHSP） to puncture vessels under aseptic conditions during peripherally inserted central catheter（PICC） on postoperative phlebitis. Methods： A total of 720 hospitalized patients undergoing first PICC were assigned to treatment and control groups（360 cases each group） according to a random number table. The control group received conventional catheterization and nursing care. The treatment group was first given hot compress with CHSP（which consisted of honeysuckle 30 g, Semen brassicae 30 g, Salvia miltiorrhiza 30 g, Angelica dahurica 30 g, Semen raphani 30 g, Evodia rutaecarpa 30 g, and coarse salt 20 g） on the punctured vessel under aseptic conditions for 5–10 min before conventional catheterization. The main efficacy indices were the vessel diameters before and during catheterization and the success rate of a single catheter, and the secondary efficacy indiex was the incidence of superficial phlebitis within 1 week after catheterization. Results： The vessel diameter during catheterization of the treatment group was remarkably increased compared with the control group [（7.96±0.42） mm vs.（4.39±0.54） mm, P〈0.01]. The success rate of the single catheter of the treatment group was significantly higher than that of the control group [94.00%（329/350） vs. 73.72%（244/329）, P〈0.01]. The incidence of superficial phlebitis within 1 week after catheterization in the treatment group was lower than that in the control group（P=0.007）. There was no adverse event with CHSP. Conclusion： Hot compress with CHSP during PICC is applicable as it can effectively improve the success rate of a single catheter and reduce the incidence of superficial phlebitis after catheterization（Trial registration No. ChiCTR-ONC-17010498）.

关键词： Chinese herbal salt packets hot compression peripherally inserted central catheter catheterization phlebitis success rate of single catheter randomized controlled trial