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A Bright Single-Photon Source from Nitrogen-Vacancy Centers in Diamond Nanowires

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Chinese Physics Letters 2017年第9期34卷 70-73页

作者： Shen Li Cui-Hong Li bo-wen zhao Yang Dong Cong-Cong Li Xiang-Dong Chen Ya-Song Ge Fang-wen Sun Key Lab of Quantum Information Chinese Academy of Sciences University of Science and Technology of China Hefei 230026 Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 University of Chinese Academy of Sciences Beijing 100049

Single-photon flux is one of the crucial properties of nitrogen vacancy （NV） centers in diamond for its application in quantum information techniques. Here we fabricate diamond conical nanowires to enhance the single-photon count rate. Through the interaction between tightly confined optical mode in nanowires and NV centers, the single-photon lifetime is much shortened and the collection efficiency is enhanced. As a result, the detected single-photon rate can be at 564 kcps, and the total detection coefficient can be 0.8%, which is much higher than that in bulk diamond. Such a nanowire single-photon device with high photon flux can be applied to improve the fidelity of quantum computation and the precision of quantum sensors.

关键词： A Bright Single-Photon Source from Nitrogen-Vacancy Centers in Diamond Nanowires

Lifetime maximization of cooperative networks with mean channel gain information

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 98-103页

作者： YANG Chang-qing,WANG wen-bo,zhao Shuang,PENG Mu-gen School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

A simple but effective relay-selection and power-allocation scheme is proposed to maximize the lifetime of decode-and-forward （DF） cooperative networks under the constraint that only the mean channel gain information is available at the transmitters. The new scheme takes both channel state information （CSI） and residual energy information （REI） into consideration. To evaluate the performance of the proposed scheme, three typical relay-selection and power-allocation schemes, i.e., maximum residual energy （MRE）, minimum transmit power （MTP） and equal transmit power （ETP） are considered. Simulation results show that the proposed scheme outperforms the MRE and the MTP in lifetime duration and outage probability, while needing much less signal overhead compared with the ETP.

关键词： cooperative commtmication lifetime relay selection power allocation Rayleigh fading

Construction of shallow buried large-span metro stations using the small pipe roof-beam method

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Frontiers of Structural and Civil Engineering 2024年第1期18卷 122-136页

作者： Qian BAI wen zhao Yingda ZHANG Pengjiao JIA Xiangrui MENG bo LU Xin WANG Dazeng SUN School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Centre for Infrastructure Engineering and Safety School of Civil and Environmental EngineeringThe University of New South WalesNSW 2052Australia School of Rail Transportation Soochow UniversitySuzhou 215131China China Northeast Architectural Design and Research Institute Co. Ltd.Shenyang 110006China

In relation to the Shifu Road Station project on Line 4 of the Shenyang Metro in China,a small-pipe roof-beam method for constructing subway stations is ***,a numerical simulation was performed to optimize the supporting parameters of the proposed method and determine the design ***,the deformation of the pipe roof and surface settlement during the construction process were ***,the surface settlement attributed to the excavation was studied through field monitoring,and the proposed method was compared with other *** results show that an increase in the pipe-roof spacing has little effect on the surface settlement and piperoof *** bearing capacity of the pipe roof can be efficiently utilized once the flexural stiffness reaches 2EI,and the flexural stiffness is not the dominant factor controlling the *** essential stages in controlling surface settlement are the excavations of the transverse pilot tunnels and the soil between *** final settlement value of the ground was 24.1 mm,resulting in a reduction in the construction period by at least five months while satisfying the control requirements.

关键词： subway station pipe-roof method surface settlement simulation on-site monitoring

Inter-phase selective corrosion of γ-TiAl alloy in molten salt environment at high temperature

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Progress in Natural Science:Materials International 2011年第4期21卷 322-329页

作者： wen-yue zhao,bo-wen XU,Yue MA,Sheng-kai GONG Key Laboratory of Aerospace Materials and Performance(Ministry of Education), School of Materials Science and Engineering,Beihang University,Beijing 100191,China Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and Engineering Beihang University Beijing 100191 China

Hot corrosion behavior of Ti-48Al-2Cr-2Nb alloy in molten salt environment of 75%Na2SO4and 25%NaCl(mass fraction) at 800℃was studied using oxidation kinetics analysis,scanning electron microscopy,X-ray energy dispersive and X-ray diffraction *** inter-phase selective corrosion,which caused the corrosion pits initiated from lamellar interfaces and the preferential corrosion ofα2phases,was observed during the hot corrosion of the *** common controls of thermodynamic and kinetics in corrosion reactions with fluxing and active oxidation process were considered the essential hot corrosion mechanisms of the ***,lamellar refinement was proved to be an effective way to mitigate the inter-phase selective corrosion of the alloy in molten salts.

关键词： hot corrosion TiAl-based alloy inter-phase selective corrosion molten salts

Treatment of osteoporotic intertrochanteric fractures by zoledronic acid injection combined with proximal femoral nail anti-rotation

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Chinese Journal of Traumatology 2016年第5期19卷 259-263页

作者： Yong Li wen-bo zhao De-Li Wang Qing He Qin Li Fu-Xing Pei Lei Liu Department of Orthopedics Navy General Hospital of PLA Bering China Department of Orthopedics West China Hospital Sichuan University Chengdu China

Objective： To observe the clinical results of proximal femoral nail anti-rotation （PFNA） combined with zoledronic acid injection in the treatment of osteoporotic intertrochanteric fractures in the elderly. Methods： 60 elderly patients with osteoporotic intertrochanteric fractures were diagnosed using a dual energy X-ray bone density instrument. Patients were randomly divided into treatment or control groups （30 cases in each group）. Patients in both groups were treated by closed/open reduction and internal fixation using PFNA. In the treatment group, patients received one zoledronic phosphonic acid injection of 5 mg/100 ml via intravenous drip, in addition to 600 mg of Cakrate D （qd） and 0.25 μg of alpha ossification alcohol （qd）. The control group received 600 mg of Caltrate D （qd） and 0.25 μg of alpha ossification alcohol （qd）. The oral drugs were administered for 12 months. bone pain relief was observed, and changes in the bone mineral density （BMD） of the lumbar and health-side hip were recorded. Clinical results were evaluated using the Visual Analogue Scale （VAS）, Harris joint function score, and Osteo- porosis Quality of Life Scale （OQOLS）. Results： Compared with the control group, bone pain symptoms wene significantly alleviated （p 〈 0.05） in the treatment group. In the treatment and control groups, both between-group and within-group differences in BMD were significantly increased in L1-4, femoral neck and trochanter （p 〈 0.05）. No significant differences were found between the two groups in regard to the involved hip or the total rate of improvement at the end of the follow-up period, although cases in the treatment group had higher OQOLS scores than those of the controls （p = 0.04）. Cases in the treatment group healed more quickly than those in the control group [（13 ± 3.2） weeks vs （15 ± 4.6） weeks, p = 0.02]. During the follow^up period, cases in the treatment group had no new fractures, whereas 2 new cases of hip fracture and 2 cases of distal radial f

关键词： Hip fractures Osteoporosis Internal fixators Aged

Nitro-oleic acid ameliorates erectile dysfunction in a streptozotocin-induced rat model of diabetes by inhibiting oxidative stress and apoptosis and activating the NO/cGMP pathway

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Asian Journal of Andrology 2024年第1期26卷 57-66页

作者： Chang-bo zhao Wei-bo Chen wen-Zhen Wang Fang-Xin Gong Cui-Qin Fan Ye Li Tian Lan wen-Jing Wang Ming-Zhen Yuan Department of Urology Shandong Provincial HospitalShandong UniversityJinan 250012China Department of Andrology Liaocheng People's HospitalShandong UniversityLiaocheng 252000China Department of Urology The Second Hospital of Shandong UniversityJinan 250012China Department of Physiology School of Basic Medical SciencesShandong UniversityJinan 250012China

The major vascular complications associated with diabetes make the management of diabetic mellitus erectile dysfunction(DMED)a challenging *** factors contributing to DMED include oxidative stress,nitric oxide(NO)/cyclic guanosine monophosphate(cGMP)pathway activation,and apoptosis,while nitro-oleic acid(NO,-OA)has been shown to be beneficial in treating these aspects of this ***,herein,investigated the effects and possible mechanisms of NO,-OA on erectile function as assessed in a streptozotocin-induced rat model of *** results revealed that the erectile function of DMED rats was significantly impaired compared with that of the control ***,in response to 4 weeks of NO,-OA treatment,there was an improvement in erectile *** expression of oxidative stress-related indicators was significantly increased and the NO/cGMP pathway was impaired in the DMED *** expression of proapoptotic factors was increased,while that of antiapoptotic factors was decreased in the DMED ***,the cell morphology in the cavernous tissue of the DMED group also changed ***,-OA treatment significantly reversed all these changes observed in the DMED *** conclusion,NO,-OA treatment partially improved erectile function in DMED rats through mechanisms that included inhibition of oxidative stress,activation of the NO/cGMP pathway,and a reduction in apoptosis.

关键词： apoptosis diabetic mellitus erectile dysfunction nitro-oleic acid NO/cGMP pathway oxidative stress

Transfer-learning multi-input multi-output equalizer for mode-division multiplexing systems

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Chinese Optics Letters 2024年第7期22卷 12-18页

作者： Tianfeng zhao Feng wen Mingming Tan Baojian Wu bo Xu Kun Qiu Key Laboratory of Optical Fiber Sensing and Communication Ministry of EducationUniversity of Electronic Science and Technology of ChinaChengdu 611731China Aston Institute of Photonics Technologies Aston UniversityBirmingham B47ETUK

We propose a transfer-learning multi-input multi-output(TL-MIMO)scheme to significantly reduce the required training complexity for converging the equalizers in mode-division multiplexing(MDM)*** on a built three-mode(LP01,LP11a,and LP11b)multiplexed experimental system,we thoughtfully investigate the TL-MIMO performances on the three-typed data,collecting from different sampling times,launching optical powers,and inputting optical signal-to-noise ratios(OSNRs).A dramatic reduction of approximately 40%–83.33%in the required training complexity is achieved in all three ***,the good stability of TL-MIMO in both the launched powers and OSNR test bands has also been proved.

关键词： mode division multiplexing multi-input multi-output transfer learning training complexity

Black hole evaporation and its remnants with the generalized uncertainty principle including a linear term

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Communications in Theoretical Physics 2024年第2期76卷 125-136页

作者： bo Yu Zheng-wen Long College of Physics Guizhou UniversityGuiyang550025China

In recent years,researchers have investigated the evaporation of Schwarzschild black holes using various forms of the generalized uncertainty principle(GUP),metric quantum correction,and noncommutative geometry,***,there are differences between the GUP correction and the other two methods in terms of describing the later stages of black hole ***,some studies argue that the GUP with a negative parameter cannot effectively correct black hole evaporation,while others contend that the positivity or negativity of the GUP parameters should not affect the correction *** the above into consideration,we reconsider black hole evaporation with the generalized uncertainty principle including a linear term(LGUP),and examine the case of negative *** results indicate that the evaporation behavior of both Schwarzschild black holes and Reissner–Nordstr?m black holes,under LGUP correction,is consistent with the results of metric quantum correction and non-commutative ***,the negative parameter LGUP can also effectively correct for black hole evaporation.

关键词： black hole evaporation generalized uncertainty principle negative parameter

Ultraviolet phosphorescent carbon nanodots

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Light(Science & Applications) 2022年第6期11卷 1274-1284页

作者： Shi-Yu Song Kai-Kai Liu Qing Cao Xin Mao wen-bo zhao Yong Wang Ya-Chuan Liang Jin-Hao Zang Qing Lou Lin Dong Chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Material and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China

Phosphorescent carbon nanodots(CNDs)have generated enormous interest recently,and the CND phosphorescence is usually located in the visible region,while ultraviolet(UV)phosphorescent CNDs have not been reported thus ***,the UV phosphorescence of CNDs was achieved by decreasing conjugation size and in-situ spatial confinement in a NaCNO *** electron transition from the P_(x) to the sp^(2) orbit of the N atoms within the CNDs can generate one-unit orbital angular momentum,providing a driving force for the triplet excitons population of the *** confinement caused by the NaCNO crystal reduces the energy dissipation paths of the generated triplet *** further tailoring the size of the CNDs,the phosphorescence wavelength can be tuned to 348 nm,and the room temperature lifetime of the CNDs can reach 15.8 *** a demonstration,the UV phosphorescent CNDs were used for inactivating gram-negative and gram-positive bacteria through the emission of their high-energy photons over a long duration,and the resulting antibacterial efficiency reached over 99.9%.This work provides a rational design strategy for UV phosphorescent CNDs and demonstrates their novel antibacterial applications.

关键词： rational ultraviolet lifetime