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Journal of Clinical and Nursing Research 2020年第4期4卷 95-98页

作者： Gang Li Zhiyong Cao Jingqin Chen Gang fang Guangxi Zhuang Yao Medicine Center of Engineering and Technology GuangxiUniversity of Chinese MedicineNanning 530200China Medical Department of Hubei University for Nationalities EnshiChina

Objecrive:To investigate the expression of TNF-αand NF-κB in the uterus of chronic pelvic inflammatory disease(CPID)model ***:40 female rats that adaptive fed for 5 days were randomly divided into normal group,model group,high dose group,medium dose group and low *** addition to the normal group:the rats in each group were made chronic pelvic inflammatory model by mechanical injuuy combined with implantation of *** rats in each group were administrated by gavage for *** the last administration,the level of TNF-αand NF-κB in serum was measured by ELASA ***:(1)after the establishment of the model,the uterus of the chronic pelvic inflammatory model rats showed the pathological damage of chroic infilammation;the levels of lNF-αand NF-κB inserum were higher than those in the normal group,the difference was statistically significant(Pfang teng fang Group was basically restored to normal,with only a small amount of inflammatory cell infiltration and other pathological changes;compared with the rats in the model group,the TNF-αin serum of the rats in each treatment group was lower,the difference was statistically significant(Pteng fang can efectively improve the endometrial histomorphology of CPID model rats,and regulate the levels of TNF-αand NF-κB in the uterus of chronic pelvic inflammatory model rats.

关键词： Zhuang Yi Liu fang teng fang,Chronic pelvic inflammatory disease TNF-α NF-κB

Effects of adverse pressure gradient on Reynolds stresses inturbulent boundary layers

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航空动力学报 2017年第2期32卷 463-469页

作者： LUO Xiao-tian ZHANG Ce MA Wei teng Jin-fang School of Aeronautics and Astronautics Shanghai Jiao Tong University

The effects of adverse pressure gradient(APG)on Reynolds stresses in turbulent boundary layers(TBLs)with APG were *** difficulty of this work was attributable to the Reynolds stresses in TBLs with APG under two combined effects,i.e.:effect of upstream flow and effect of *** effect of upstream flow is an inherent effect no matter pressure gradient exists or *** individual effect was analyzed from absolute developments of Reynolds stresses in TBLs with zero pressure gradient(ZPG)*** of APG was then analyzed from absolute developments of Reynolds stresses in TBLs with *** showed that,for absolute development of mean streamwise Reynolds stresses,APG accelerated its development in TBL with ZPG;for absolute development of mean normal or shear Reynolds stresses,APG increased their magnitude in the outer part,and decreased their extent of large value region.

关键词： turbulent boundary layer adverse pressure gradient zero pressure gradient Reynolds stresses flat plate

An interval finite element method for electromagnetic problems with spatially uncertain parameters

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Science China(Technological Sciences) 2020年第1期63卷 25-43页

作者： WANG ZhongHua JIANG Chao NI BingYu WANG CongSi ZHONG JianFeng fang teng State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Key Laboratory of Electronic Equipment Structure Design of Ministry of Education School of Electro-Mechanical EngineeringXidian UniversityXi'an 710071China Nanjing Research Institute of Electronics Technology Nanjing 210039China

During the manufacturing process of dielectric materials used in electromagnetic engineering, the electromagnetic parameters are often spatially uncertain due to the processing technology, environmental temperature, personal operations, etc. Traditionally,the random field model can be used to measure the spatial uncertainties, but its construction requires a large number of *** the contrary, the interval field model only needs the upper and lower bounds of the spatially uncertain parameters, which requires much less samples and furthermore is easy to understand and use for engineers. Therefore, in this paper, the interval field model is introduced to describe the spatial uncertainties of dielectric materials, and then an interval finite element method(IFEM) is proposed to calculate the upper and lower bounds of electromagnetic responses. Firstly, the interval field of the dielectric material is represented by the interval K-L expansion and inserted into the scalar Helmholtz wave equations, and thus the interval equilibrium equations are constructed according to the node-based finite element method. Secondly, a perturbation interval finite element method is developed for calculating the upper and lower bounds of electromagnetic responses such as the electric strength and magnetic strength. Finally, the effectiveness of the proposed method is verified by three numerical examples.

关键词： electromagnetic problems spatial uncertainty interval field model interval finite element method

Approaching the minimum lattice thermal conductivity of p-type SnTe thermoelectric materials by Sb and Mg alloying

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Science Bulletin 2019年第14期64卷 1024-1030页

作者： Tiezheng Fu Jiazhan Xin Tiejun Zhu Jiajun Shen teng fang Xinbing Zhao State Key Laboratory of Silicon Materials and School of Materials Science and EngineeringZhejiang University

SnTe, as the nontoxic analogue to high-performance PbTe thermoelectric material, has captured the worldwide interest recently. Many triumphant instances focus on the strategies of band convergence, resonant doping, and nano-precipitates phonon scattering. Herein, the p-type SnTe-based materials Sn0.85-xSb0.15MgxTe (x=0-0.10) are fabricated and a combined effect of Sb and Mg is investigated. Sb alloying tunes the hole carrier concentration of SnTe and decreases the lattice thermal conductivity. Mg alloying leads to a nearly hundredfold rise of disorder parameter due to the large mass and strain fluctuations, and as a consequence the lattice thermal conductivity decreases further down to ~0.64Wm^-1K^-1 at 773K, close to the theoretical minimum of the lattice thermal conductivity (~0.50Wm^-1K^-1) of SnTe. In conjunction with the enhancement of the Seebeck coefficient caused by band convergence due to Mg alloying, the maximum zTmax reaches ~1.02 and the device zTdevice of ~0.50 at 773K for Sn0.79Sb0.15Mg0.06Te, suggesting this SnTe-based composition has a promising potential in intermediate temperature thermoelectric applications.

关键词： Tin telluride Thermoelectric materials Point defect scattering Band convergence

Microstructure inheritance of matrixes of SiC_(f)/Ti6242 composites from precursor wire coatings byα+βphase field consolidation

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Rare Metals 2021年第12期40卷 3676-3684页

作者： Wang-teng-Fei fang Xu Huang Hu Li Min-Juan Wan Mao Wen Hao Huang AECC Beijing Institute of Aeronautical Materials Beijing 100095China College of Materials Science and Engineering Jilin UniversityChangchun 130012China

SiC_(f)/Ti composite owns the attractive advantages of lightweight and excellent high-temperature performance,which make it have great significance to the development of aerospace ***,the complicated fabrication route and novel architecture of SiC_(f)/Ti composite bring about more difficulties for controlling its *** this work,the method of regulating the structure and performance of the composite matrix by adjusting the characteristics of the precursor wire was *** physical vapor deposition(PVD)method was applied to fabricate precursor ***6242 coatings with bamboo leaf-shaped grains and chrysanthemumshaped grains were deposited on SiC fibers by changing the PVD *** is found that the original structure of the Ti6242 coating of precursor wire has significant impact on the microstructure of the composite matrix after hot isostatic pressing(HIP).The matrix transformed from the Ti6242 coating with bamboo leaf-shaped grains exhibits equiaxed grain *** the other matrix has a columnar crystal structure,and the inside of the columnar crystal inherits the original chrysanthemum-shaped *** columnar crystal matrix has lower hardness and modulus than the equiaxed grain matrix.

关键词： SiC_(f)/Ti composite physical vapor deposition(PVD) Ti6242 coating HIP consolidation Matrix

Mid-temperature thermoelectric performance of zone-melted Sb_(2)(Te,Se)_(3) alloys near phase transition boundary

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Journal of Materiomics 2019年第4期5卷 590-596页

作者： Beibei Li Renshuang Zhai teng fang Kaiyang Xia Yongjun Wu Tiejun Zhu State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China

(Bi,Sb)_(2)(Te,Se)_(3) alloys are widely used commercial thermoelectric(TE)materials for solid-state refrigeration around room *** composition-induced structural phase transition could be realized by varying the compositions in these alloys,which may largely alter the electronic structure and phonon *** them,the Se-alloyed Sb_(2)Te_(3) accompanied with structural transition is seldom ***,the interrelations of Se-alloying induced changes in structural phase transition,band structure and TE properties of p-type zone-melted Sb_(2)Te_(3-x)Se_(x)(x=1.5-2.4)alloys near phase transition boundary are systematically *** results demonstrate that Sb_(2)Te_(3-x)Se_(x) shows a structural transition from a rhombohedral phase to mixed structure at x=*** carrier concentration and bandgap at room temperature of Sb_(2)Te_(3)-xSex(x=1.5-2.4)constantly decrease with increasing Se contents *** zT peak of the Sb_(2)TeSe_(2) matrix is improved and shifted to higher temperature by optimizing carrier concentration via Ag doping.A maximum zT of~0.4 is obtained at 680 K in Sb_(1.97)Ag_(0.03)TeSe_(2) alloy,about 100% enhancement compared with the undoped sample.

关键词： Thermoelectric materials Zone melting Structural transition Doping Thermoelectric properties

Inhibition of microRNA-29b suppresses oxidative stress and reduces apoptosis in ischemic stroke

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Neural Regeneration Research 2022年第2期17卷 433-439页

作者： Yao-Hua Ma Wen-Jing Deng Zhi-Yi Luo Jing Jing Peng-Wei Pan Yao-Bing Yao Yan-Bo fang Jun-fang teng Neurological Intensive Care Unit the First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina

MicroRNAs(miRNAs) regulate protein expression by antagonizing the translation of mRNAs and are effective regulators of normal nervous system development, function, and disease. Micro RNA-29 b(mi R-29 b) plays a broad and critical role in brain homeostasis. In this study, we tested the function of mi R-29 b in animal and cell models by inhibiting mi R-29 b expression. Mouse models of middle cerebral artery occlusion were established using the modified Zea-Longa suture method. Prior to modeling, 50 nmol/kg mi R-29 b antagomir was injected via the tail vein. Mi R-29 b expression was found to be abnormally increased in ischemic brain tissue. The inhibition of mi R-29 b expression decreased the neurological function score and reduced the cerebral infarction volume and cell apoptosis. In addition, the inhibition of mi R-29 b significantly decreased the malondialdehyde level, increased superoxide dismutase activity, and Bcl-2 expression, and inhibited Bax and Caspase3 expression. PC12 cells were treated with glutamate for 12 hours to establish in vitro cell models of ischemic stroke and then treated with the mi R-29 antagomir for 48 hours. The results revealed that mi R-29 b inhibition in PC12 cells increased Bcl-2 expression and inhibited cell apoptosis and oxidative damage. These findings suggest that the inhibition of mi R-29 b inhibits oxidative stress and cell apoptosis in ischemic stroke, producing therapeutic effects in ischemic stroke. This study was approved by the Laboratory Animal Care and Use Committee of the First Affiliated Hospital of Zhengzhou University(approval No. 201709276 S) on September 27, 2017.

关键词： Akt apoptosis cerebral artery occlusion ischemic stroke malondialdehyde microRNA-29b oxidative stress PI3K superoxide dismutase

Acoustic characteristics of eight common Chinese anurans during the breeding season

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Zoological Research 2014年第1期35卷 42-50页

作者： Yi-Lin ZHOU Xia QIU Xiao-Bin fang Lu-Yi YANG Yi ZHAO teng fang Wei-Hong ZHENG Jin-Song LIU School of Life and Environmental Sciences Wenzhou University Wenzhou 325035 China Gutianshan National Nature Reserve Zone Kaihua 324300 China

Anurans often have species-specific vocalizations. To quantify and compare the characteristics of anuran calls in Gutianshan National Nature Reserve, Zhejiang Province, we recorded the advertisement calls of eight species belonging to four families （Ranidae, Microhylidae, Megophryidae and Bufonidae） from June to September 2012 using Sony ICD-FX8 IC recorders. All recordings were analyzed using the ＂Praat＂ software. Five acoustics parameters were measured, including temporal traits （call duration, number of notes or pulse number/call） and spectral traits （fundamental frequency, the first three formants and dominant frequency）. The characteristic parameters of Microhyla ornate and Fejervarya limnocharis calls were different as were the calls of some populations of the same species recorded in different regions. The advertisement calls of the eight species were specific. Our study has provided a useful reference for identifying the calls of some common Chinese anurans.

关键词： Anurans Advertisement calls Acoustic characteristics

Broadband ＆ Digital Content-Couple Subscriber Cooperative Relaying Networks for Uplink Transmission using Hierarchical Game Approach

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China Communications 2010年第2期7卷 16-31页

作者： Song Meil teng Yinglei Niu fang Zhang Yong Wang Li Beijing University of Posts and Telecommunications Beijing 100876 P.R. China

Cooperation allows wireless network users to benefit from various gains such as an in- crease in the achieved rate or an improvement in the bit error rate. In the paper, we propose a distributed Hierarchical Game （HG） theoretic framework over multi-user cooperative communication networks to stimulate cooperation and improve the network performance. First, we study a two- user decision making game in the OFDMA based subscriber cooperative relaying network, in which subscribers transmit their own data in the first phase, while helping to retransmit their partner＇s or choosing to freeride in the second phase. Instead of consulting to a global optimal solution, we decouple the cooperation resource allocation into two level subproblems： a user level Nash game for distributed cooperation decision and a Base Station （BS） level coalition game for centralized resource allocation. In the proposed HG algorithm, where mutual cooperation is preferred and total payoff is transferable, we prove it converges to a unique optimal equilibrium and resolve the subcarrier as-signment and power allocation among the couples. Besides, we discuss the existence of the publishing and rewarding coefficients in order to encourage cooperation. Then, we extend the HG to multi-user cases by coupling among subscribers according to the location information. The simulation results show that the proposed scheme with the distributed HG game achieves a well tradeoff between fairness and efficiency by improving the transmission efficiency of adverse users and outperforms those employing centralized schemes.

关键词： cooperative relay hierachical game infrastructure relay subscriber relay Nash Equilibrium

Carbon Monoxide Alleviates Salt-Induced Oxidative Damage in Wheat Seedling Leaves

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Journal of Integrative Plant Biology 2006年第3期48卷 249-254页

作者： Ben-Kai Huang Sheng Xu Wei Xuan Ming LI Ze-Yu Cao Kai-Li Liu teng-fang Ling Wen-Biao Shen College of Life Sciences Nanjing Agricultural University Nanjing 210095 China College of Sciences Nanjing Agricultural University Nanjing 210095 China

Carbon monoxide （CO）, a by-product released during the degradation of heme by heme oxygenases （EC 1.***.99.3） In animals, is regarded as an important physiological messenger or bioactive molecule involved in many biological events that has been recently reported as playing a major role in mediating the cytoprotectlon against oxidant-induced lung Injury. In the present study, we first determined the protective effect of exogenous CO against salt-induced oxidative damage in wheat seedling leaves. Wheat seedlings treated with 0.01μmol/L hematin as the CO donor demonstrated significant reversal of chlorophyll decay, dry weight, and water loss induced by 300 mmol/L NaCl stress. Interestingly, the increase in lipid peroxidation observed in salt-treated leaves was reversed by 0.01μmol/L hematin treatment. Time-couree analyses showed that application of 0.01μmol/L hematln enhanced gualacol peroxidase, superoxide dismutase, ascorbate peroxidase and catalase activities in wheat seedling leaves subjected to salt stress. These effects are specific for CO because the CO scavenger hemoglobin （1.2 mg/L） blocked the actions of the CO donor hematln. However, higher concentration of the CO donor （1.0μmol/L） did not alleviate dry weight and water loss of salt-stressed wheat seedlings. These results suggest that exogenous application of low levels of a CO donor may be advantageous against salinity toxicity.

关键词： carbon monoxide lipid peroxidation oxidative stress salinity seedling leaves wheat.