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Acta Mechanica Sinica 2014年第2期30卷 274-280页

作者： Jing Xu xiao-long wang Yun-Qiao Liu xiao-Bo Gong MOE Key Laboratory of Hydrodynamics Department of Engineering MechanicsShanghai Jiao Tong University SJTU-CU ICRC Shanghai Jiao Tong University

The effect of mechanical properties of erythrocytes on the near-wall motion of platelets was numerically studied with the immersed boundary method. Cells were modeled as viscous-fluid-filled capsules surrounded by hyper-elastic membranes with negligible thickness. The numerical results show that with the increase of hematocrit, the near-wall approaching of platelets is enhanced, with which platelets exhibit larger deformation and orientation angle of its near-wall tank-treading motion, and the lateral force pushing platelets to the wall is increased with larger fluctuation amplitude. Meanwhile the near-wall approaching is reduced by increasing the stiffness of erythrocytes.

关键词： Hemodynamics Fluid-membrane interaction Immersed boundary method Near-wall motion of platelet

Correlation between Conformation Change of Polyelectrolyte Brushes and Lubrication

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Chinese Journal of Polymer Science 2015年第1期33卷 163-172页

作者： Bin Li 于波 xiao-long wang 郭峰 Feng Zhou State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences School of Mechanical Engineering Qingdao Technological University

We directly monitor the absolute separation profiles that function as film thickness between a single glass disk and the charged polyelectrolyte brushes decorated steel slider in water using a home-made slider-on-disk apparatus, which reflects the structural conformation variations and interactions of polymer brushes under externally applied pressure, in addition to probing the relative variation of friction forces under different applied loads and sliding velocities. We find that the polyelectrolyte brushes modified surfaces can sustain high pressure and have extremely low friction coefficients（around 0.006 at pressures of 0.13 MPa; 0.5-0.6 without brushes）. The water-lubrication characteristics are correlated to the structural conformation changes of the polyelectrolyte brushes that are mainly governed by electrostatic interactions and the osmotic pressure of counterions inside the polymer chains, which can be used to support and distribute the normal pressure. The apparent thickness of the brush decreases with the increase of loading forces, an increase in the ionic strength causes the polymer chains collapse, and the friction forces increase. This fundamental research is of great importance to understand the mechanical and structural properties of polyelectrolyte brushes and their influences on the tribological behaviors, and helps to design friction/lubrication-controlled surface/interface by taking advantage of polyelectrolyte brushes.

关键词： Polyelectrolyte brush Lubrication Conformation Electrolyte.

Tribological properties of laser cladding TiB_2 particles reinforced Ni-base alloy composite coatings on aluminum alloy

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Rare Metals 2015年第11期34卷 789-796页

作者： long He Ye-Fa Tan xiao-long wang Qi-Feng Jing Xiang Hong College of Field Engineering PLA University of Science and Technology

To improve the wear resistance of aluminum alloy frictional parts, Ti B2particles reinforced Ni-base alloy composite coatings were prepared on aluminum alloy 7005 by laser cladding. The microstructure and tribological properties of the composite coatings were investigated. The results show that the composite coating contains the phases of Ni Al, Ni3Al, Al3Ni2, TiB2, TiB, TiC, CrB, and *** microhardness is HV0.5855.8, which is 15.4 % higher than that of the Ni-base alloy coating and is 6.7 times as high as that of the aluminum alloy. The friction coefficients of the composite coatings are reduced by 6.8 %–21.6 % and 13.2 %–32.4 % compared with those of the Ni-base alloy coatings and the aluminum alloys, while the wear losses are 27.4 %–43.2 % less than those of the Ni-base alloy coatings and are only 16.5 %–32.7 % of those of the aluminum alloys at different loads. At the light loads ranging from 3 to 6 N, the calculated maximum contact stress is smaller than the elastic limit contact stress. The wear mechanism of the composite coatings is micro-cutting wear, but changes into multi-plastic deformation wear at 9 N due to the higher calculated maximum contact stress than the elastic limit contact stress. As the loads increase to 12 N, the calculated flash temperature rises to 332.1 °*** composite coating experiences multi-plastic deformation wear, micro-brittle fracture wear, and oxidative wear.

关键词： Ti B2 Ni-base alloy Laser cladding Composite coati

A New Sesquiterpene and a New Norsesquiterpene from Cacalia deltophylla

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Chinese Chemical Letters 2003年第8期14卷 818-819页

作者： Ying wang Cheng Shan YUAN xiao long wang Zhong Jian JIA Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

A new sesquiterpene and a new norsesquiterpene were isolated from the whole plant of Cacalia deltophylla (Maxim) Mattf. Their structures were elucidated as deltocacalone (1) and deltonorcacalol (2) by spectroscopic m... 详细信息

关键词： Cacalia deltophylla Compositae cacalone cacalol.

A novel rat model of seminal vesiculitis

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Asian Journal of Andrology 2019年第4期21卷 360-364页

作者： Peng Zhang xiao-long wang Zhong-Hua Yang Xin-Jun Su Xing-Huan wang Department of Urology Zhongnan Hospital Wuhan University Wuhan 430071 China Department of Urology Research Lab/LIFE-Zentrum University of Munich (LMU) Munchen 81377 Germany

We aimed to establish a novel rat model of seminal vesiculitis that would provide an effective approach to investigate the pathogenesis of this disease in the future. Eight male rats received the same operation, during which the root of one of the two seminal vesicles was partly ligatured with sutures and the other vesicle was left in tact. The samples of seminal vesicles were harvested on the 8th day followi ng the operation. Hematoxylin and eosi n and Mass on's trichrome stains were used to observe the histopathology and the presenee of fibrous tissue in seminal vesicles, respectively. Immunoblotting and immunohistochemistry were applied to determine the tumor n ecrosis factor-alpha and cyclooxygenase-2 levels in semi nal vesicle tissues. Real-time fluoresce nee qua ntitative polymerase chain reaction was performed to measure the gene expression levels of proinflammatory cytokines. H2O2 levels in the seminal plasma from the seminal vesicle were also measured. Hematoxylin and eosin staining suggested that there was inflammatory cell in filtration into the semi nal vesicles treated by partial root ligati on. The tumor n ecrosis factor-alpha and cyclooxygenase-2 proteins were significantly upregulated in the treated seminal vesicles. The tumor necrosis factor-alpha, cyclooxygenase, interleukin 6, and inducible nitric oxide synthase mRNA expression levels were also upregulated in the treated seminal vesicles. The H2O2 levels in the seminal plasma from seminal vesicles with partial root ligation were significantly elevated compared with those from vesicle left intact. In conclusion, partially ligating the root of the seminal vesicle via sutures in rats is an effective method to establish a seminal vesiculitis rat model.

关键词： cyclooxygenase-2 rat model seminal vesiculitis tumor necrosis factor

Design and performance of a high-speed and low-noise preamplifier for SiPM

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Nuclear Science and Techniques 2023年第11期34卷 93-102页

作者： Xi‑Yang wang Hong‑Yu Zhang De‑Qing Fang Wan‑Bing He xiao‑long wang Qi‑Bin Zheng Shi‑Ming Zou Key Laboratory of Nuclear Physics and Ion‑beam Application(MOE)and Institute of Modern Physics Fudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai 200438China Laboratory of Radiation Detection and Medical Imaging and School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Considering the R&D for upgrading the K^(0)_(L) andμdetectors in the Belle II experiment using a scintillator and silicon pho-tomultiplier(SiPM),we designed a compact high-speed and low-noise *** preamplifier demonstrated a good gain stability,bandwidth of 426 MHz,baseline noise level ofσ≈0.6 mV,dynamic range of up to170 mV of the input signal amplitude,good time resolution of 20 ps,and it can be comprehensively applied to *** pole-zero-cancelation in the preamplifier reduces both the rise and fall times of the SiPM signal,which can significantly improve the time resolution and reduce the pile-up when using a large SiPM or an array of *** combinations of the preamplifier and several types of SiPMs demonstrated time resolutions better than 50 ps for most cases;when the number of detected photons was larger than 60,a time resolution of approximately 25 ps was achieved.

关键词： Silicon photomultiplier High-speed amplifier Low noise High time resolution

Synthesis and characterization of novel polyimides based on thiazole-containing diamine

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Chinese Chemical Letters 2007年第10期18卷 1203-1204页

作者： Xin Zhao Yan Feng Li Shu Jiang Zhang xiao long-wang Yu Shao State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringInstitute of Biochemical Engineering ＆ Environmental Technology Lanzhou University Lanzhou 730000 China

A new kind of aromatic diamine monomer containing thiazole unit, 2-amino-5-（4-aminophenyl）-thiazole （AAPT）, was synthesized in three steps, starting from 4-nitroacetophenone. A novel thiazole-containing polyimide was prepared via the polycondensation of AAPT with 6FDA by one-step method. The resulting polyimide exhibits excellent solubility, film-forming capability and high thermal resistance.

关键词： Thiazole Thiazole-containing monomer Synthesis Aromatic diamine

Synthesis of anew siloxane-containing diamine and related polyimide

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Chinese Chemical Letters 2007年第6期18卷 762-763页

作者： Yu Shao Yan Feng Li xiao long wang Jin Shan Guo Xin Zhao State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

A novel siloxane-containing diamine, bis[4-(p-aminophenoxy)phenoxy]dimethylsilane (APPMS), was successfully synthesized in three steps using hydroquinone as starting material, which was reacted with 4,4′-oxydiphthalic anhydride (ODPA) via a conventional two-step thermal or chemical imidization method to produce a new siloxane-containing polyimide. The resulting polyimide exhibited excellent solubility, and film-forming capability.

关键词： Polyimide Siloxane-containing diamine Solubility

Polarization control and tuning efficiency of tunable vertical-cavity surface-emitting laser with internal-cavity sub-wavelength grating

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Chinese Physics B 2020年第8期29卷 310-316页

作者： xiao-long wang Yong-Gang Zou Zhi-Fang He Guo-Jun Liu xiao-Hui Ma State Key Laboratory of High-Power Laser Diodes Changchun University of Science and TechnologyChangchun 130022China

We design an 850 nm tunable vertical-cavity surface-emitting laser(VCSEL)structure using an internal-cavity sub-wavelength *** use of such a tuning structure allows for wider wavelength tuning range and more stable single-polarization as compared to conventional tunable *** features of the internal-cavity grating effect on the wavelength tuning and polarization characteristics of the tunable VCSEL are *** simulation results show that the largest wavelength tuning range achieves 44.2 nm,and the maximum orthogonal polarization suppression ratio(OPSR)is 33.4 dB(TE-type)and 38.7 dB(TM-type).

关键词： sub-wavelength grating polarization mode tunable VCSEL wavelength tuning

Migration behavior of solid fuel particles during granulation process and its influence on combustion property

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Journal of Iron and Steel Research International 2023年第11期30卷 2153-2162页

作者： Zhi-yun Ji Yi-fan wang xiao-hui Fan Gai-ge Zhao Min Gan Le-yun Tang Yong Tu xiao-long wang Hao-xiang Zheng Xu-ling Chen xiao-xian Huang Zeng-qing Sun School of Minerals Processing and Bioengineering Central South UniversityChangsha410083HunanChina Hunan Valin Xiangtan Iron and Steel Co. Ltd.Xiangtan411101HunanChina

Iron ore sintering process is the main CO_(2) emission source throughout the integrate steelworks,which primarily comes from the combustion of solid *** the combustion efficiency and reducing the solid fuel consumption are important ways to reduce the CO_(2) emission in the sintering *** the efficient combustion of fuel,the migration behavior and combustion characteristics of solid fuel in the granulation process were *** results indicated that during the granulation process,fuel particles with size less than 0.5 mm mainly migrated into the granules with grain size of 1-3,3-5 and 5-8 mm;fuel particles with size of 0.5^(-1)mm mainly migrated into granules of 1-3 mm;fuel particles with size of 1-3,3-5 and 5-8 mm mainly entered the granules with the same grain *** the increase in fuel particles grain size from-0.5 to+8 mm,the combustion efficiency exhibited a firstly-increasing and then decreasing tendency,while the NO_(x) exhibited a decreasing *** reason can be described that finer fuel particles(-1 mm)easily distributed in the outer layer of the granules,which combusted fiercely due to its larger specific surface area,leading to the development of incomplete combustion and the conversion of fuel nitrogen;the combustion efficiency of larger fuel particles was restricted by the inner diffusion of O_(2),which then contributed to the reduction of NO_(x) under the inadequate combustion atmosphere.

关键词： Iron ore sintering Granulation Solid fuel distribution Pollutant emission Combustion efficiency