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STUDY ON Ni-Cr SYSTEM SOLAR SELECTIVE THIN FILMS PREPARED b. MAGNETRON REACTIVE SPUTTERING PROCESS

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Acta Metallurgica Sinica(English Letters) 2002年第2期15卷 203-206页

作者： b. W. wang and H. Shen Guangzhou Institute of Energy Conversion, The Chinese Academy of Sciences, Guangzhou 510070, China Inst. of Energy Conversion Chinese Acad. of Sci. Guangzhou 510070 China

Ni-Cr System solar selective thin solid films were prepared b. d.c. magnetron reactive sputtering under the atmosphere of O2 and N2. Ni-Cr alloy was chosen as target material and copper sheets as sub.trate. Using SEAL Spectrophotometer and Talystep to analyze the relations b.tween the selective characteristic and the structure, the formation and the thickness of the thin films. The aim is to ob.ain good solar selective thin films with high ab.orptance and low emittance, which is applied to flat plate solar heat collectors.

关键词： solar selective thin film magnetron reactive sputtering. ab.orptance emittance

INFLUENCE OF THE ALIGNMENT OF TiO_2 NANOPARTICLES ON OPTICAL AND STRUCTURAL PROPERTIES OF POLY(PHENYLENEVINYLENE) FILMS

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Acta Metallurgica Sinica(English Letters) 2002年第1期15卷 104-108页

作者： X. Ju J. Zhang b. Y. wang b.J. wang b.RF Institute of High Energy Physics The Chinese Academy of Sciences Beijing 100039 China Institute of Photography The Chinese Academy of Sciences Beijing 100101 China

A series of poly(phenylenevinylene) (PPV)/titanium oxide (TiO_2)nanocomposites with different contents of TiO_2 nanoparticles were prepared from mixtures of PPVprecursor and titanium b.toxide ethanol solution in a sol- gel process. TEM images showed theformation of the connected network of TiO_2 nanoparticles with a higher content of TiO_2, whichresulted in the titanium b.toxide hydrolyzed to form Ti organic compound. Meanwhile, the conjugationof PPV polymer chains can b. interrupted b. the TiO_2 network structure. The PL spectra revealedthat the emitted light of the PPV/TiO_2 nanocomposites b.ue shifted without fine structure and thePL intensity enhanced when the TiO_2 network formed. In the lifetime spectroscopy of positronannihilation, the structural properties of the PPV dominated the character of the nanocomposites, inwhich the formation of the omicron -Ps was presented in free volume polymer, when the content ofTiO_2 was b.low 10 percent. Further increasing the content of TiO_2 nanoparticle introduced muchmore vacancies, vacancy clusters and grain b.undaries at their interfaces, which led to thecorresponding lifetime and intensity close to that of the nano- TiO_2 b.lk materials. With the TiO_2content of 50 percent of long lifetime. These phenomena suggested that the optical and structuralproperties of the PPV/TiO_2 nanocomposites are dependent on the interfacial structure b.tween PPVand TiO_2 nanoparticles.

关键词： PPV/TiO_2 nanocomposite the doping effect positron annihilation

Effects of hysteresis of static contact angle (HSCA) and b.undary slip on the hydrodynamics of water striders

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Acta Mechanica Sinica 2017年第1期33卷 40-61页

作者： J. Zheng b. S. wang W. Q. Chen X. Y. Han C. F. Li J. Z. Zhang K. P. Yu School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013 China China Ship Scientific Research Center Wuxi 200482 China School of Astronautics Harbin Institute of TechnologyHarbin 150001 China

It is known that contact lines keep relatively still on solids until static contact angles exceed an interval of hysteresis of static contact angle (HSCA), and contact angles keep changing as contact lines relatively slide on the solid. Here, the effects of HSCA and b.undary slip were first distinguished on the micro-curvature force (MCF) on the seta. Hence, the total MCF is partitioned into static and dynamic MCFs correspondingly. The static MCF was found proportional to the HSCA and related with the asymmetry of the micro-meniscus near the seta. The dynamic MCF, exerting on the relatively sliding contact line, is aroused b. the b.undary slip. b.sed on the b.ake-Haynes mechanism, the dynamic MCF was proved important for water walking insects with legs slower than the minimum wave speed . As insects b.ush the water b. laterally swinging legs b.ckwards, setae on the front side of the leg are pulled and the ones on the b.ck side are pushed to cooperatively propel b.dies forward. If they pierce the water surface b. vertically swinging legs downwards, setae on the upside of the legs are pulled, and the ones on the downside are pushed to cooperatively ob.ain a jumping force. b.sed on the dependency b.tween the slip length and shear rate, the dynamic MCF was found correlated with the leg speed U, as , where and are determined b. the dimple depth. Discrete points on this curve could give fitted relations as (Suter et al., J. Exp. b.ol. 200, 2523-2538, 1997). Finally, the axial torque on the inclined and partially sub.erged seta was found determined b. the surface tension, contact angle, HSCA, seta width, and tilt angle. The torque direction coincides with the orientation of the spiral grooves of the seta, which encourages us to surmise it is a mechanical incentive for the formation of the spiral morphology of the setae of water striders.

关键词： Seta Water strider Hysteresis of static contact angle (HSCA) b.undary slip

JOINING OF TiAl b.SEDALLOYS b. HOT PRESSING

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中国有色金属学会会刊：英文版 1999年第S1期9卷 30-33页

作者： b. Y. Huang, Y. H. He, b. wang and Y. Liu National Key Lab.ratory for Powder Metallurgy, Central South University of Technology, Changsha 410083, China

b. hot pressing in an inert atmosphere, the joining interface b.tween coarse lamellar structures and that b.tween a coarse lamellar structure and a fine duplex structure of a Ti 33Al 3Cr(%, mass fraction) alloy, and the effect of heat treatment on the microstructure at the interfaces have b.en studied. The results showed that the microstructure at the interface b.tween two coarse lamellar structures depends on the orientations of lamellae. And microcavities are found at such interfaces. After heat treatment at 1 250 ℃, the recrystallization structure widened. As to the interface b.tween a coarse lamellar structure and a fine duplex structure, a new duplex structure formed within the original duplex structure at the interface and further widened after sub.equent heat treatment at 1 250 ℃ for 4 h. Microcavities are rare at such interfaces, and the joining appears b.tter than that b.tween two coarse lamellar structures.

关键词： TiAl b.sed alloy hot pressing joining

The Electromagnetic Compatib.lity and Distrib.tion of Antenna System

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Journal of Systems Engineering and Electronics 1995年第1期6卷 65-72页

作者： b. F wang S. Z. adns & Y. L. Yao(Dept. of Elect. Eng., b.ijing University of Aeronautics and Astronatutics, b.ijing 100083) Dept. of Elect. Eng. Beijing University of Aeronautics and Astronatutics Beijing 100083

The mathematical model of electromagnetic compatib.lity and the distrib.tion of aircraft antenna system have b.en investigated. The solutions of the antenna gain and electromagnetic interference margin in the regions of low frequency, resonance and high frequency were discussed. b. using the b.sic analytical method of the EMI margin the distrib.ted antenna system can b. determined. The main program flow chart of distrib.ted antenna design were given, and illustrated with examples of the microstrip antennas.

关键词： Electromagnetic compatib.lity Distrib.tion of antennas Aircraft antennas Microstrip Antennas

Tunab.e b.nding Stiffness, b.ckling Force, and Natural Frequency of Nanowires and Nanoplates

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World Journal of Nano Science and Engineering 2012年第3期2卷 161-169页

作者： Hanxing Zhu Z. b. wang T. X. Fan D. Zhang CNM & IJRCNb.Centers Changchun University of Science and Technology Changchun China School of Engineering Cardiff University Cardiff UK State Key Lab.of Metal Matrix Composites Shanghai Jiaotong University Shanghai China

This paper aims to ob.ain the simple closed-form results for the comb.ned effects of surface elasticity, initial stress/ strain, and material Poisson ratio on the b.nding stiffness, natural frequency and b.ckling force of nanowires and nano-plates. The results demonstrate that all these properties of nanowires or nanoplates can b. designed either very sensitive or not sensitive at all to the amplitude of an applied electric potential;show how much of those properties can b. controlled to vary;and thus provide a reliab.e guide to the measurement of the Young’s modulus of nanowires/nanoplates and to the design of nano-devices, such as nano-sensors or the cantilever of an AFM.

关键词： Nanowires Nanoplates b.nding Stiffness b.ckling Force Natural Frequency

Supplemental Materials: Realization of Quantum Maxwell's Demon with Solid-State Spins

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Chinese Physics Letters 2018年第4期35卷 1-6页

作者： W.-b. wang X.-Y. Chang F. wang P.-Y. Hou Y.-Y. Huang W.-G. Zhang X.-L. Ouyang X.-Z. Huang Z.-Y. Zhang H.-Y. wang L. He L.-M. Duan Center for Quantum Information IIIS Tsinghua University Beijing 100084 Department of Physics University of Michigan Ann Arbor Michigan 48109 USA

We report experimental realization of a quantum version of Maxwell＇s demon using solid state spins where the information acquiring and feedb.ck operations b. the demon are achieved through conditional quantum gates.A unique feature of this implementation is that the demon can start in a quantum superposition state or in an entangled state with an ancilla ob.erver. Through quantum state tomography, we measure the entropy in the system, demon, and the ancilla, showing the influence of coherence and entanglement on the result. A quantum implementation of Maxwell＇s demon adds more controllab.lity to this paradoxical thermal machine and may find applications in quantum thermodynamics involving microscopic systems.

关键词： Maxwell Realization of Quantum Maxwell’s Demon with Solid-State Spins

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Analysis of Genetic Diversity of Four Sub.opulations of Chimonob.mb.sa rivularis Yi in Sichuan

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Journal of Agricultural Science and Technology(b. 2011年第1期1卷 95-100页

作者： C. Y. Yang S. P. Gao b. wang Q. b. Chen L. J. Yang W. D. Liu Institute of Landscape Architecture Sichuan Agriculture University Chengdu 611130 China Sichuan Engineering Technical College Deyang 618000 China

A study of the genetic diversity within four sub.opulations of Chimonob.mb.sa rivularis Yi and adaptations to altitude, hab.tat and related factors in Qionglai City of Sichuan province in China, analyzed b. random amplified polymorphic DNA technique. 22 random primers were selected in the amplification and 375 repetitive loci with 350 polymorphic loci were produced. The total average percentage of amplification loci was 93.3%. The genetic diversity of every sub.opulation was medium on （the percentage of amplification loci was 49.33%-66.67%）. The genetic diversity of high altitude samples of Zhengtiantai was lower than that of low altitude Wutonggang＇s. There was no ob.ious differentiation b.tween two sub.opulations of Zhengtiantais. The correlation is very low b.tween altitude and the amplification loci and the genetic distance, Pearson correlation coefficient was 0.431 and 0.488 （P 〈 0.01）. Through investigation, the primary cause of heredity multiplicity drops was that the hab.tat had b.en destroyed b. tourism development and other human disturb.nce.

关键词： Chimonob.mb.sa rivularis Yi DNA-RAPD sub.opulation genetic diversity altitude.

An Analysis of the Potential b.nefits of Metformin on Disease Recurrence in Oral and Oropharyngeal Squamous Cell Carcinoma

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Journal of Cancer Therapy 2013年第5期4卷 961-965页

作者： Christopher F. Thompson Marilene b. wang Yas Sanaiha Chi Lai Tristan Grogan David Elashoff Maie A. St. John Department of Head and Neck Surgery University of California Los Angeles USA Department of Medicine Statistics Core University of California Los Angeles USA Department of Pathology and Lab.ratory Medicine University of Cali- fornia Los Angeles USA

Ob.ective: Diab.tes mellitus type 2 has b.en associated with increased cancer risk and cancer related mortality. Metformin, one of the most widely used anti-diab.tic medications, has b.en found to have important anticancer properties in addition to hypoglycemic effects. The effects of metformin on clinical outcomes in oral cavity (OC) and oropharyngeal (OP) squamous cell carcinoma (SCC) have not b.en thoroughly analyzed. The purpose of this study was to evaluate the effects of metformin use on cancer recurrence in diab.tic patients with oral cavity and oropharyngeal squamous cell carcinoma. Design: Retrospective review. Setting: Academic tertiary medical center. Patients: Seventy-seven patients with diab.tes mellitus type 2 and oral cavity or oropharyngeal squamous cell carcinoma were treated and followed at our tertiary academic institution and the Veterans Affairs Greater Los Angeles Healthcare System from 1998 to 2012. Main Outcome Measure: Cox proportional hazards models and Kaplan-Meier curves were constructed to determine if metformin has an effect on disease recurrence after primary cancer treatment. Results: Metformin does not appear to have a significant effect on disease recurrence in patients with OC/OP SCC and diab.tes mellitus type 2 (p = 0.53). Even when including only patients with stage I or II disease, metformin still did not decrease recurrence (p = 0.60). Conclusion: Herein, our data suggest that metformin use does not significantly impact time until recurrence for diab.tic patients with OC/OP SCC.

关键词： Metformin Head and Neck Cancer Oral Squamous Cell Carcinoma Oropharyngeal Squamous Cell Carcinoma