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Rare Metals 2023年第5期42卷 1535-1544页

作者： Lan-fang Wang Rui-Xia Yang jin-zhi Fu Yue-Yue Cao Rui-fang Ding Xiao-Hong Xu Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education&School of Chemistry and Materials Science of Shanxi Normal University Taiyuan030032China Kunshan Superior Silk Screen Printing Material Co. Ltd.Suzhou215300China

The development of non-noble-metal hydrogen evolution electrocatalysts holds great promises for a sustainable energy ***,a hybrid W(Mo)S_(2)/NW(Mo)C nanosheet with array structures was reported for an efficient light-as sis ted hydrogen evolution electrocatalysts in acidic *** resulting vertically aligned W(Mo)S_(2)/N-W(Mo)C was supported on a conductive carbon fiber paper,which can be produced through annealing W(Mo)S_(2)nanosheets by simultaneous carbonization and N-doping in Ar/H_(2)*** optimized WS_(2)/NWC and MoS_(2)/N-MoC electrode exhibits remarkable lightassisted electrocatalysis activity with overpotentials of0.120 and 0.122 V at 10 mA·cm^(-1)in acidic solutions,*** high hydrogen evolution activities should be attributed to the electrocatalytic synergistic effects of the abundant active sites existing in different phase boundaries and the absorption for ultraviolet-visible *** study shows that synthesis of low-cost and highly active W(Mo)S_(2)-based hydrogen evolution electrocatalyst opens up a route toward the development of scalable production of hydrogen fuels.

关键词： W(Mo)S_(2)/N-W(Mo)C heterostructures Vertically aligned nanosheets Hydrogen evolution Lightassisted electrocatalysis

Lattice Boltzmann simulation of solute transport in a single rough fracture

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Water Science and Engineering 2014年第3期7卷 277-287页

作者： zhi DOU zhi-fang ZHOU School of Earth Sciences and Engineering Hohai University

In this study, the lattice Boltzmann method （LBM） was used to simulate the solute transport in a single rough fracture. The self-affine rough fracture wall was generated with the successive random addition method. The ability of the developed LBM to simulate the solute transport was validated by Taylor dispersion. The effect of fluid velocity on the solute transport in a single rough fracture was investigated using the LBM. The breakthrough curves （BTCs） for continuous injection sources in rough fractures were analyzed and discussed with different Reynolds numbers （Re）. The results show that the rough frac~＇e wall leads to a large fluid velocity gradient across the aperture. Consequently, there is a broad distribution of the immobile region along the rough fracture wall. This distribution of the immobile region is very sensitive to the Re and fracture geometry, and the immobile region is enlarged with the increase of Re and roughness. The concentration of the solute front in the mobile region increases with the Re. Furthermore, the Re and roughness have significant effects on BTCs, and the slow solute molecule exchange between the mobile and immobile regions results in a long breakthrough tail for the rough fracture. This study also demonstrates that the developed LBM can be effective in studying the solute transport in a rough fracture.

关键词： solute transport single rough fracture Lattice Boltzmann method, self-affinity breakthrough curve

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腰椎间盘突出症模型大鼠疼痛的针刺干预

中国组织工程研究 2025年第5期29卷 936-941页

作者：支芳朱满华熊伟林星镇南昌市洪都中医院江西省南昌市330038

背景:针灸是缓解腰椎间盘突出症腰痛的有效方法,但其机制目前尚未明确。JAK2/STAT3信号通路相关因子可调节机体炎症反应,参与神经病理性疼痛的过程。目的:基于JAK2/STAT3信号通路研究针刺对腰椎间盘突出症模型大鼠的作用机制。方法:采... 详细信息

背景:针灸是缓解腰椎间盘突出症腰痛的有效方法,但其机制目前尚未明确。JAK2/STAT3信号通路相关因子可调节机体炎症反应,参与神经病理性疼痛的过程。目的:基于JAK2/STAT3信号通路研究针刺对腰椎间盘突出症模型大鼠的作用机制。方法:采用随机数字表法将40只SD大鼠分为假手术组、模型组、针刺组与针刺+激动剂组,每组10只。模型组、针刺组及针刺+激动剂组采用自体髓核移植法构建L5腰椎间盘突出症模型,造模3 d后,针刺组开始进行针刺治疗(作用于阳陵泉、肾俞、环跳、大肠俞等穴位),针刺+激动剂组造模后第6,12,18天针刺治疗前向L4/L5椎间隙鞘内注射JAK2激动剂香豆霉素A1,针刺治疗1次/d,20 min/次,连续治疗15 d。造模前及造模后3,6,9,12,15,18 d,检测大鼠机械缩足阈值;造模后18 d,检测血清炎症因子水平,苏木精-伊红染色观察L5-L6组织形态,RT-PCR检测L5-L6组织JAK2、STAT3 mRNA表达,Western Blot检测L5-L6组织JAK2、STAT3、p-JAK2及p-STAT3蛋白表达。结果与结论:①模型组大鼠造模后不同时间点的机械缩足阈值均低于假手术组(P<0.05),针刺组大鼠造模后9,12,15,18 d的机械缩足阈值均高于模型组(P<0.05),针刺+激动剂组大鼠造模后9,12,15,18 d的机械缩足阈值均低于针刺组(P<0.05);②与假手术组比较,模型组白细胞介素6、肿瘤坏死因子α、神经递质P物质、脑部神经肽Y水平均升高(P<0.05);与模型组比较,针刺组4种炎症因子水平均降低(P<0.05);与针刺组比较,针刺+激动剂组4种炎症因子水平均升高(P<0.05);③苏木精-伊红染色显示模型组大鼠腰椎退行性变化明显,针刺组与针刺+激动剂组大鼠腰椎退行性变化减轻,针刺组减轻更明显;④与假手术组比较,模型组JAK2与STAT3 mRNA表达、p-JAK2与p-STAT3蛋白表达均升高(P<0.05);与模型组比较,针刺组JAK2与STAT3 mRNA表达、p-JAK2与p-STAT3蛋白表达均降低(P<0.05);与针刺组比较,针刺+激动剂组JAK2与STAT3 mRNA表达、p-JAK2与p-STAT3蛋白表达均升高(P<0.05);⑤结果表明,针刺干预可通过降低腰椎间盘突出症模型大鼠的炎症反应来缓解疼痛,其作用机制可能与抑制JAK2/STAT3信号通路有关。

关键词： JAK2/STAT3信号通路针刺腰椎间盘突出症病理性疼痛机械缩足阈值炎症反应

Fullerene bisadduct stabilizers:The effect of different addition positions on inhibiting the autocatalytic decomposition of nitrocellulose absorbed nitroglycerin

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Defence Technology（防务技术） 2021年第6期17卷 1944-1953页

作者： Ling Liao Bo jin zhi-cheng Guo Fei Xian Chen-jie Hou Ru-fang Peng State Key Laboratory of Environment-friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologySichuanMianyang621010China

To explore the effect of different positions and number of pyrrolidine bound to the carbon cage on the stabilization effect of fulleropyrrolidine derivatives to nitrocellulose(NC)/nitroglycerine(NG),we synthesized N-(4-methoxy)phenylpyrrolidine-C_(60) and four different of bis(N-(4-methoxy)phenylpyrrolidine)-C_(60) compounds through Prato *** structures were characterized by UVevis,^(1)H NMR,^(13)C NMR,high-resolution mass spectroscopy,and single-crystal X-ray *** stabilization effect to NC/NG were investigated using differential scanning calorimetry,methyl violet,vacuum stabilization effect,weight loss,and accelerating rate calorimeter *** results indicated these compounds had excellent stabilization effect to NC/*** stabilization effect of the fulleropyrrolidine bisadducts to NC/NG is significantly better than that of fulleropyrrolidine monoadduct and C_(60).Moreover,the position where pyrrolidine binds to fullerene in fulleropyrrolidine bisadducts is different,and its stabilization effect to NC is also *** stabilization effect order of different bisadduct isomers to nitrocellulose is as follows:e-edge>trans-2>cis-2>*** paramagnetic resonance(EPR)and FT-IR were used to study the stabilization mechanism of fulleropyrrolidine derivatives to NC/*** EPR results also show that fulleropyrrolidine bisadducts with different addition sites have different abilities to absorb nitroxide,and their ability is better than that of the monoadduct and C_(60),which is consistent with the results of stabilization effect performance test.

关键词： Fulleropyrrolidine bisadducts Stabilization effect Nitrocellulose/nitroglycerine

Plastic limit load analysis for pressure pipe with incomplete welding defects based on the extended Net Section Collapse Criteria

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第6期11卷 440-448页

作者： zhi-jiang jin Cheng-hang JIANG Xian-ping WAN Po CHEN Xiao-fang WANG Institute of Chemical Process Equipment Zhejiang University Hangzhou 310027 China

With von Mises yield criterion,the loading range of Net Section Collapse(NSC) Criteria is extended from combined tension and bending loadings to combined bending,torsion and internal pressure loadings.A new theoretical analyzing method of plastic limit load for pressure pipe with incomplete welding defects based on the extended NSC Criteria is presented and the correlative formulas are deduced,the influences of pipe curvature,circumferential length and depth of incomplete welding defects on the plastic limit load of pressure pipe are considered as well in this ***,according to the orthogonal experimental design method,the plastic limit loads are calculated by the finite element method and compared with the theoretical *** results show that the expressions of plastic limit load of pressure pipe with incomplete welding defects under bending,torsion and internal pressure based on extended NSC criteria are *** study provides an important theoretical basis for the establishment of safety assessment measure towards pressure pipe with incomplete welding defects.

关键词： Net Section Collapse(NSC) Criteria Incomplete welding defects Pressure pipe Plastic limit load Finite element

STUDY ON CATASTROPHIC MECHANISM FOR ROTOR DROP TRANSIENT VIBRATION FOLLOWING MAGNETIC BEARING FAILURE

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Applied Mathematics and Mechanics(English Edition) 2002年第11期23卷 1319-1325页

作者： fang zhi-chu(方之楚) Department of Engineering Mechanics Shanghai Jiaotong University Shanghai 200030 P R China

The nonlinear and transient vibration of a rotor, which dropped onto back-up bearings when its active magnetic bearings were out of order, was investigated. After strictly deriving its equations of motion and performing numerical simulations, the time-histories of rotating speed of the dropping rotor, and normal force at the rubbing contact point as well as the frequency spectrum of the vibration displacement of back-up bearings are fully analyzed. It is found that the strong and unsteady forced bending vibration of the unbalanced and, damped rotor decelerating through : its first. bending vibtation of the unbalanced and, damped rotor decelerating through its,first critical speed as well as chattering at high frequencies caused by the nonlinearity at the rubbing contact point between, the journal and back-up bearings may lead to the catastrophic damage. of the system.

关键词： rotor system with active magnetic bearing magnetic bearing failure transient response passing through critical speed nonlinear rubbing catastrophic mechanism

Effect of metallurgical dust on NO emissions during coal combustion process

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Journal of Iron and Steel Research International 2018年第1期25卷 19-27页

作者： zhi-fang Gao Hong-ming Long Tie-jun Chun Zhao-jin Wu Zheng-wei Yu School of Metallurgy Engineering Anhui Universityof Technology Ma'anshan 243002 Anhui China Key Laboratory of Metallurgical Emission Reductionand Resources Recycling Ministry of Education AnhuiUniversity of Technology Ma'anshan 243002 Anhui China

NO emissions from coal combustion are receiving significant attention in recent years. As a solid waste generated from metallurgical industry, metallurgical dust （MD） contains a large amount of metal oxides, such as Fe2O3, CaO, SiO2 and Al2O3, as well as other rare metal oxides. The influence of MD on the NO emissions and the mechanism of the coal com- bustion systems were analyzed. The results show that the peak values of NO emission decrease with the increase in MD mass percent, and the curve of NO emission can be divided into two stages including rapid generation （400-600 ℃） and slow release （800-900 ℃）. The reduction of NO is significantly affected by temperature, volatile components, 02 and CO. CO has a significant catalytic action which can deoxidize NO to N2. The results obtained by X-ray diffraction and scanning electron microscopy indicate that multiple components in MD, such as FegTiO15, Fe2O3 and TiO2, can react with NO to produce TiN. Besides, the alkali metals in MD, such as Na, K and Ca, may catalyze NO precursor to inhibit NO emission. These results indicate that MD is cheap and highly efficient in controlling NO emissions during coal combustion processes.

关键词： Metallurgical dust NO emission Reaction mechanism Coal combustion

An investigation of numerical aperture of air-core photonic bandgap fiber

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Science China(Technological Sciences) 2015年第2期58卷 352-356页

作者： XU Xiao Bin GAO Fu Yu ZHANG zhi Hao jin jing SONG Ning fang Institute of Opto-electronics Technology Beihang University

Air-core photonic bandgap fiber(PBF)is the perfect choice of the next-generation fiber optical gyroscope(FOG),with excellent temperature,electromagnetism and radiation *** aperture is an important optical parameter of PBF for application in *** PBF’s maximum theoretical numerical aperture(NAmax)is calculated and compared with the far-field numerical aperture(NAeff)through *** result indicates that the relationship between NAmax and NAeff has much stronger dependence on wavelength than that of the conventional fiber,and they get close at wavelengths near the middle of the photonic bandgap with the error less than 5%.Furthermore,photonic bandgap fiber optical gyroscope(PBFOG)with no fusion splicing points is proposed,and the optimization method and results of the PBF’s structure parameters for application in PBFOG are given from the aspect of numerical aperture.

关键词： fiber optical gyroscope (FOG) photonic bandgap fiber (PBF) numerical aperture

Tuning Out-of-Plane Spin Polarization Using in-Plane Magnetic Fields in a Quasi-One-Dimensional Quantum Wire Embedded in （110） Plane

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Chinese Physics Letters 2014年第3期31卷 148-151页

作者： SUN jin-fang CHENG fang The State Key Laboratory for Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 Department of Physics and Electronic Science Changsha University of Science and Technology Changsha 410004

We investigate theoretically the combination effect of an in-plane magnetic field and spin-orbit interactions （SOIs） on the spin and charge transport property of a quasi-one-dimensional quantum wire embedded in the （110） crystallographic plane. We find that the oscillations of the conductance induced by the SOIs become more significant and different for the spin-up and spin-down electrons in the presence of the in-plane magnetic field. The conductance exhibits a significant anisotropic behavior and electrons exhibit out-of-plane spin polarization which can be tuned by an in-plane magnetic field. These features offer us an efficient way to control SOI-induced spin transport using in-plane magnetic fields.

关键词： SPIN polarization RESEARCH MAGNETIC fields NANOWIRES SPIN-orbit interactions (Physics) PHYSICS research

3D entangled fractional squeezing transformation and its quantura mechanical correspondence

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Frontiers of physics 2016年第3期11卷 81-87页

作者： fang Jia Shuang Xu Cheng-zhi Deng Cun-jin Liu Li-Yun Hu Center for Quantum Science and Technology Jiangxi Normal University Nanchan9 330022 China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China School of Information Engineering Nanchang Institute of Technology Nanchang 330099 China

A new type of entangled fractionaJ squeezing transformation （EFrST） has been theoretically pro- posed for 2D entanglement [Front. Phys. 10, 100302 （2015）]. In this paper, we shall extend this case to that of 3D entanglement by introducing a type of three-mode entangled state representation, which is not the product of tkrec 1D cases. Using the technique of integration within an ordered product of operators, we derive a compact unitary operator corresponding to the 3D fractional entangling transformation, which is an entangling operator that presents a clear transformation re- lation. We also verified that the additivity property of the novel 3D EFrST is of a Fourier character by using its quantum mechanical description. As an application of this representation, the EFrST of the three-mode number state is calculated using the quantum description of the EFrST.

关键词： entangled fractional squeezing transformation entangled state representation