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| 1 | Vacuum brazing of GH99 superalloy using graphene reinforced BNi-2 composite filler显示文摘A novel graphene reinforced BNi-2 composite filler was developed for brazing GH99 superalloy. The interfacial microstructure of brazed joints was analyzed by field emission scanning electron microscope and a transmission electron microscope. The effects of graphene addition on the microstructure evolution and mechanical properties of brazed joints were investigated, and the strengthening mechanism of graphene was analyzed. The results revealed that due to the addition of graphene, M23(C,B)6 compounds were synthesized in the solid solution and brittle boride precipitates near the brazing seam decreased.Graphene was effective in retarding solute atoms diffusion thus impeding the precipitation of borides.Furthermore, the low coefficient of thermal expansion(CTE) of graphene was conducive to relieve stress concentration of the brazed joints during the cooling process. The shear strengths of brazed joints were significantly improved by exerting the strengthening effect of graphene. The maximum shear strengths of the brazed joints were 410.4 MPa and 329.7 MPa at room temperature and 800?C, respectively. | Duo Liu Yanyu Song Bin Shi Qi Zhang Xiaoguo Song Hongwei Niu Jicai Feng | 2018 | Journal of Materials Science & Technology2018，34，10： | 10 |
| 2 | Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites显示文摘With the innovation of microelectronics technology, the heat dissipation problem inside the device will face a severe test. In this work, cellulose aerogel(CA) with highly enhanced thermal conductivity(TC) in vertical planes was successfully obtained by constructing a vertically aligned silicon carbide nanowires(SiC NWs)/boron nitride(BN) network via the ice template-assisted strategy. The unique network structure of SiC NWs connected to BN ensures that the TC of the composite in the vertical direction reaches 2.21 W m^(-1) K^(-1) at a low hybrid filler loading of 16.69 wt%, which was increased by 890% compared to pure epoxy(EP). In addition, relying on unique porous network structure of CA, EP-based composite also showed higher TC than other comparative samples in the horizontal direction. Meanwhile, the composite exhibits good electrically insulating with a volume electrical resistivity about 2.35 × 10^(11) Ω cm and displays excellent electromagnetic wave absorption performance with a minimum reflection loss of-21.5 dB and a wide effective absorption bandwidth(<-10 dB) from 8.8 to 11.6 GHz. Therefore, this work provides a new strategy for manufacturing polymer-based composites with excellent multifunctional performances in microelectronic packaging applications. | Duo Pan Gui Yang Hala MAbo-Dief Jingwen Dong Fengmei Su Chuntai Liu Yifan Li Ben Bin Xu Vignesh Murugadoss Nithesh Naik Salah MEl-Bahy Zeinhom MEl-Bahy Minan Huang Zhanhu Guo | 2022 | Nano-Micro Letters2022，14，7： | 7 |
| 3 | H2 strain attenuated live hepatitis A vaccines:protective efficacy in a hepatitis A outbreak显示文摘AIM To investigate the protective efficacy ofH2 strain attenuated live hepatitis A vaccines(H2-strain vaccines)in hepatitis A(HA)outbreaks.METHODS With the permission of theirparents,5551 pre-school and grade 1-3 primaryschool children were inoculated with 1 dose(106.5TCID50)of H2-strain vaccines in anonrandomized,controlled trial conducted inFucheng County,Hebei Province in May 1997.Another 6485 children in the same grades andcompatible in gender and age were enrolled ascontrols.Epidemiological and serological surveywas conducted to evaluate the protectiveefficacy of the vaccines.ELISA was used todetect serum IgM anti-HAV.RESULTS HA outbreak started in early May1998,peaked in the middle of the same month,and lasted about 80 days.Overall 302 HA caseswere found,192(53.58%)were 5-9 years old.One vaccinee and 25 control cases were found tohave hepatitis A,which account for 0.28%(1/356)and 5.92%(25/422)of all vaccinees andcontrols in the 14 villages,respectively.The protective efficacy of vaccines was 95.27%(95% Cl:85.83%-104.72%).In subjects testedfor anti-HAV IgM from 13 villages,1(0.40%)overt and 11(4.06%)asymptomatic HAV caseswere found in 271 vaccinees,but 21(6.69%)ofovert and asymptomatic ones were found in 314controls.CONCLUSION H2 strain vaccines were excellent in preventing overt hepatitis A, but not so effective in preventing asymptomatic hepatitis A virus infection. A booster dose might be needed to get permanent reliable immunity. | Yu Liang Zhao Zong Da Meng Zhi Yi Xu Jun Jie Guo Shao Ai Chai Cheng Gang Duo Xuan Yi Wang Jin Feng Yao Hong Bin Liu Shun Xiang Qi Hui Bin Zhu | 2000 | World Journal of Gastroenterology2000，6，6： | 7 |
| 4 | Joint Trajectory and Power Optimization for Securing UAV Communications Against Active Eavesdropping显示文摘Due to both of jamming and eavesdropping,active eavesdroppers can induce more serious security threats to unmanned aerial vehicle(UAV)-enabled communications.This paper considers a secure UAV communication system including both the downlink(DL)and uplink(UL)transmissions,where the confidential information is transmitted between a UAV and a ground node in the presence of an active eavesdropper.We aim to maximize the average secrecy rates of the DL and UL communications,respectively,by jointly optimizing the UAV trajectory and the UAV/ground node’s transmit power control over a given flight period.Due to the non-convexity of the formulated problems,it is difficult to obtain globally optimal solutions.However,we propose efficient iterative algorithms to obtain high-quality suboptimal solutions by applying the block coordinate descent and successive convex optimization methods.Simulation results show that the joint optimization algorithms can effectively improve the secrecy rate performance for both the DL and UL communications,as compared with other baseline schemes.The proposed schemes can be considered as special cases of UAV-assisted non-orthogonal multiple access(NOMA)networks. | Bin Duo Junsong Luo Yilian Li Hao Hu Zibin Wang | 2021 | China Communications2021，18，1： | 4 |
| 5 | Substantial transition to clean household energy mix in rural China显示文摘The household energy mix has significant impacts on human health and climate,as it contributes greatly to many health-and climate-relevant air pollutants.Compared to the well-established urban energy statistical system,the rural household energy statistical system is incomplete and is often associated with high biases.Via a nationwide investigation,this study revealed high contributions to energy supply from coal and biomass fuels in the rural household energy sector,while electricity comprised∼20%.Stacking(the use of multiple sources of energy)is significant,and the average number of energy types was 2.8 per household.Compared to 2012,the consumption of biomass and coals in 2017 decreased by 45%and 12%,respectively,while the gas consumption amount increased by 204%.Increased gas and decreased coal consumptions were mainly in cooking,while decreased biomass was in both cooking(41%)and heating(59%).The time-sharing fraction of electricity and gases(E&G)for daily cooking grew,reaching 69%in 2017,but for space heating,traditional solid fuels were still dominant,with the national average shared fraction of E&G being only 20%.The non-uniform spatial distribution and the non-linear increase in the fraction of E&G indicated challenges to achieving universal access to modern cooking energy by 2030,particularly in less-developed rural and mountainous areas.In some non-typical heating zones,the increased share of E&G for heating was significant and largely driven by income growth,but in typical heating zones,the time-sharing fraction was<5%and was not significantly increased,except in areas with policy intervention.The intervention policy not only led to dramatic increases in the clean energy fraction for heating but also accelerated the clean cooking transition.Higher income,higher education,younger age,less energy/stove stacking and smaller family size positively impacted the clean energy transition. | Guofeng Shen Rui Xiong Yanlin Tian Zhihan Luo Bahabaike Jiangtulu Wenjun Meng Wei Du Jing Meng Yuanchen Chen Bing Xue Bin Wang Yonghong Duan Jia Duo Fenggui Fan Lei Huang Tianzhen Ju Fenggui Liu Shunxin Li Xianli Liu Yungui Li Mu Wang Ying Nan Bo Pan Yanfang Pan Lizhi Wang Eddy Zeng Chao Zhan Yilin Chen Huizhong Shen Hefa Cheng Shu Tao | 2022 | National Science Review2022，9，7： | 4 |
| 6 | Faraday anomalous dispersion optical filter at 133Cs weak 459 nm transition显示文摘A 459 nm Faraday anomalous dispersion optical filter(FADOF) working at the side wings of the cesium6S1∕2→ 7P1∕2transition with weak oscillator strength is achieved. The transmittance of the higher side wing reaches 98% at a temperature of 179°C and magnetic field above 323 G. The experimental results coincide with the theoretical predictions in 1982 and 1995, which were not realized in experiments for over three decades. Due to its high transmittance, high accuracy, and narrow linewidth, the 459 nm FADOF can be applied in underwater optical communications, the building of active optical clocks, and laser frequency stabilization in active optical clocks. | Xiaobo Xue Duo Pan Xiaogang Zhang Bin Luo Jingbiao Chen Hong Guo | 2015 | Photonics Research2015，3，5： | 2 |
| 7 | Practical Polar Code Construction For Degraded Multiple-Relay Networks显示文摘In this paper, based on the characteristics of polar codes, a new decode-and-forward strategy called generalized partial information relaying protocol is proposed for degraded multiple-relay networks with orthogonal receiver components(MRNORCs). In such a protocol, with the help of partial information from previous nodes, each relay node tries to recover the received source message and re-encodes part of the decoded message for transmission to satisfy the decoding requirements for the following relay node or the destination node. In order to construct practical polar codes, the nested structures are developed based on this protocol and the information sets corresponding to the partial messages forwarded are also calculated. The proposed scheme is proved to be capable of achieving the theoretical capacity of the degraded MRN-ORCs while still retains the low-complexity feature of polar codes. We perform simulations to testify the practicability of the proposed scheme and compare polar codes by using successive-cancellation list decoder(SCLD) with traditional low-density parity-check(LDPC) codes. The results show that the obtained polar codes provide significant gain. | Bin Duo Xiaoling Zhong Yong Guo | 2017 | China Communications2017，14，4： | 2 |
| 8 | Optimal parameters selection for BP neural network based on particle swarm optimization: A case study of wind speed forecasting显示文摘 | Chao Ren Ning An Jianzhou Wang Lian Li Bin Hu Duo Shang | 2013 | Knowledge-Based Systems2013，，： | 1 |
| 9 | Tamoxifen and toremifene impair retrieval,but not acquisition of spatial information processing in mice显示文摘 | Chen Duo Wu Chun-Fu Shi Bin | 2002 | Pharmacol Biochem Behav2002，72，12： | 1 |
| 10 | The concentrations, distribution and sources of PAHs in agricultural soils and vegetables from Shunde, Guangdong, China显示文摘 | Yong Tao Li Fang Bai Li Jun Jian Chen Guo Yi Yang Hong Fu Wan Tian Bin Zhang Xiao Duo Zeng Jian Ming Liu | 2008 | 2008 (1-3)2008，，1： | 1 |
| 11 | Electrochemical properties of carbon coated LiO2 cathode materials for lithium ion batteries 显示文摘 | Bin L Zhao Yin W Jin Duo H | 2008 | Solid state ionics2008，179，2732： | 1 |
| 12 | Community Structure and Diversity of Ground Cover Plants in Tianjin Binhai International Airport显示文摘By using quadrat sampling method,the community structure and diversity of ground cover plants in the flight area in Tianjin Binhai International Airport were investigated from spring to autumn in 2015. The results showed that 58 plant species were recorded at the airport,belonging to 18 families and 48 genera.Dominant plant species showed seasonal characteristics. Specifically,Ixeris chinensis( Thunb.) Nakai and Lagopsis supina( Steph.) Ik.-Gal. ex Knorr. were the dominant species in spring; Lagopsis supina,Cirsium setosum( Willd.) MB,Plantago asiatica L.,Cynanchum chinense R. Br. and Humulus scandens( Lour.)Merr. were the dominant species in summer; Chloris virgata Sw. and Eleusine indica( L.) Gaertn. were the dominant species in autumn. Quantitative characteristics of the dominant species,including the density,frequency,coverage and height,varied in different seasons. In different seasons,changes in the diversity of plant communities in three sampling points were analyzed. The results indicated that plant communities in summer exhibited the highest diversity and the most uniform distribution. This study provided a theoretical basis for avoidance of bird strike in Tianjin Binhai International Airport. | Xiaobo LIU Huanran XU Hong YUAN Bin HE Shulan ZHAO Li'an DUO | 2017 | Agricultural Biotechnology2017，6，3： | 1 |
| 13 | Ti-6Al-4V-5Cu synthesized for antibacterial effect in vitro and in vivo via contact sterilization显示文摘Implant-related infection is one of the most catastrophic complications after surgery,since it may trigger osteomyelitis and necessitate reoperation,increasing the pain suffered by and the burden placed on the patient.Producing a new alloy with an antibacterial effect for use as a biomedical material is an urgent requirement.In this article,Ti-6 Al-4 V-5 Cu was synthesized under two different heat treatment schemes(solution temperatures of 850℃and 950℃).Through comprehensive observation of the microstructure,phase,copper ion release,biocompatibility,corrosion resistance and antibacterial effect in vitro and in vivo,it was determined that cell viability and corrosion resistance of Ti-6 Al-4 V-5 Cu was better than Ti-6 Al-4 V.More importantly,the obtained alloy,especially samples treated at 850℃,showed prominent antibacterial ability.Meanwhile,we also found that the main antibacterial mechanism of the alloy was contact sterilization via the extensive precipitation of Ti_(2)Cu instead of Cu ion release,and the content,surface area of Ti_(2)Cu could affect the antibacterial effect.These findings provide a very promising scheme by which to balance the biocompatibility and antibacterial effect of Ti-based,Cu-bearing alloys,which could improve their performance in orthopedic and dental applications. | Duo Xu Tianyu Wang Zhiyuan Lu Yuanqi Wang Bin Sun Shudan Wang Qiang Fu Zhenggang Bi Shuo Geng | 2021 | Journal of Materials Science & Technology2021，，31： | 1 |
| 14 | An active bacterial anti-adhesion strategy based on directional transportation of bacterial droplets driven by triboelectric nanogenerators显示文摘An active bacterial anti-adhesion strategy based on directional transportation of bacterial droplets driven by a triboelectric nanogenerator(TENG)has not been reported to date,although passive defense approaches can prevent bacterial adhesion by regulating superwetting surfaces combined with incorporated antibacterial substances.Here a triboelectric nanogenerator driving droplet system(TNDDS)was built to drive directional transportation of bacterial droplets to be eliminated,which comprises TENG with periodical frictional Kapton film and aluminum foils and a superhydrophobic driving platform(SDP)with paralleled driving electrodes.The current generated by the TENG triboelectricity is transmitted to the paralleled driving electrodes to form an electric field driving the directional transportation of charged droplets.The critical value of the driven droplet volume on SDP is closely related to the distributed electrodes’distance and width,and the driving distance of droplets is related to the number of electrodes.More crucially,TNDDS can actively drive the charged droplets of prepared triangular silver nanoprisms(Ag NPs)forward and back to mix with and remove a tiny bacterial droplet on an open SDP or in a tiny semi-enclosed channel.Bacteria could be killed by releasing Ag+and effectively removed by TNDDS by regulating the motion direction.Generally,this approach offers a promising application for removing bacteria from material surfaces driven by TENG and opens a new avenue for bacterial anti-adhesion. | Jing Lin Jialin Li Shichang Feng Caiqin Gu Huajian Li Hanqing Lu Fei Hu Duo Pan Ben Bin Xu Zhanhu Guo | 2023 | Nano Research2023，16，1： | 0 |
| 15 | Large area^(3)He tube array detector with modular design for multi‑physics instrument at CSNS显示文摘The multi-physics instrument(MPI)is the first user cooperative instrument at the China Spallation Neutron Source(CSNS).It was designed to explore the structures of complex materials at multiple scales based on the neutron total scattering technique.This imposes the requirements for the detector,including a high detection efficiency to reduce the measurement time and a large solid angle coverage to cover a wide range of momentum transfers.To satisfy these demands,a large-area array of 3He-filled linear position-sensitive detectors(LPSDs)was constructed,each with a diameter of 1 inch and pressure of 20 atm.It uses an orbicular layout of the detector and an eight-pack module design for the arrangement of 3He LPSDs,covering a range of scattering angles from 3°to 170°with a total detector area of approximately 7 m2.The detector works in air,which is separated from the vacuum environment to facilitate installation and maintenance.The characteristics of the MPI detector were investigated through Monte Carlo(MC)simulations using Geant4 and experimental measurements.The results suggest that the detectors are highly efficient in the wavelength range of the MPI,and an efficiency over 25%is achievable for above 0.1 A neutrons.A minimal position resolution of 6.4 mm full width at half maximum(FWHM)along the tube length was achieved at a working voltage of 2200 V,and a deviation below 2 mm between the real and measured positions was attained in the beam experiment.The detector module exhibited good consistency and an excellent counting rate capacity of up to 80 kHz,which satisfied the requirements of experiments with a high event rate.Observations of its operation over the past year have shown that the detector works steadily in sample experiments,which allows the MPI to serve the user program successfully. | Lin Zhu Jian‑Rong Zhou Yuan‑Guang Xia Liang Xiao Hong Luo Xiao‑Juan Zhou Wen‑Qin Yang Bei‑Ju Guan Xing‑Fen Jiang Yan‑Feng Wang Hong Xu Hai‑Yun Teng Li‑Xin Zeng Jia‑Jie Li Lei Hu Ke Zhou Yong‑Xiang Qiu Pei‑Xun Shen Jun Xu Li‑Jiang Liao Xiao‑Zhuang Wang Gui‑An Yang Huai‑Chan Chen Ju‑Ping Xu Zhi‑Duo Li Song‑Lin Wang Jian Zhuang Yu‑Bin Zhao Jun‑Rong Zhang Wen Yin Zhi‑Jia Sun Yuan‑Bo Chen | 2023 | Nuclear Science and Techniques2023，34，1： | 0 |
| 16 | Notch signaling leads to a slower progression of embryonic myogenic differentiation in Landrace than in Langtang pigs显示文摘Delving into porcine embryonic myogenesis is the key to elucidate the complex regulation of breed-specific differences in growth performance and meat production.Increasing evidence proves that pigs with less meat production show earlier embryonic myogenesis,but little is known about the underlying mechanisms.In this study,we examine the longissimus dorsi muscle(LDM)by immunohistochemistry and confirm that the differentiation of myogenic progenitors is increased(P<0.05)in Lantang(LT,fatty)pigs compared with that in Landrace(LR,lean)pigs,which results in more(P<0.001)differentiated myoblasts(Pax7-/MyoD^(+))and less(P<0.001)myogenic progenitors(Pax7^(+)/MyoD^(-))in LT pigs at 35 days post-conception(35dpc).Additionally,embryonic myogenic progenitors isolated from LT pigs show greater(P<0.001)differentiation capacity with earlier expression of MyoD compared with those from LR pigs.Moreover,Notch signaling is more active(P<0.05)in LR pig myogenic progenitors than in LT pig myogenic progenitors.Inhibition of Notch signaling in LR myogenic progenitors suppresses Pax7 expression and increases MyoD expression,thus promoting myogenic differentiation.Consistently,the process of myogenic progenitors differentiating into myoblasts in ex vivo embryo limbs is accelerated when Notch signaling is inhibited.These results indicate that Notch signaling facilitates the maintenance of myogenic progenitors and antagonizes myogenic differentiation by promoting Pax7 expression and preventing MyoD expression in LR pigs. | Shufang Cai Bin Hu Qi Zhu Tianqi Duo Xiaoyu Wang Xian Tong Xiaorong Luo Renqiang Yuan Yaosheng Chen Jing Wang Chenglong Luo Baosong Xing Delin Mo | 2022 | Acta Biochimica et Biophysica Sinica2022，54，8： | 0 |
| 17 | Hypoperfusion assessed by pressure reactivity index is associated with delayed cerebral ischemia after subarachnoid hemorrhage:an observational study显示文摘Background:Dysfunction of cerebral autoregulation is one of the pathophysiological mechanisms that causes delayed cerebral ischemia(DCI)after subarachnoid hemorrhage(SAH).Pressure reactivity index(PRx)have been confirmed to reflect the level of cerebral autoregulation and used to derive optimal cerebral perfusion pressure(CPPopt).The goal of this study is to explore the associations between autoregulation,CPPopt,PRx,and DCI.Methods:Continuous intracranial pressure(ICP),arterial blood pressure(ABP),and cerebral perfusion pressure(CPP)signals acquired from 61 aSAH patients were retrospectively analyzed.PRx was calculated and collected by Pneumatic computer system.The CPP at the lowest PRx was determined as the CPPopt.The duration of a hypoperfusion event(dHP)was defined as the cumulative time that the PRx was>0.3 and the CPP was | Bin Bin Fan Xiao Chuan Sun Zhi Jian Huang Xiao Min Yang Zong Duo Guo Zhao Hui He | 2021 | Chinese Neurosurgical Journal2021，7，3： | 0 |
| 18 | Achieving the capacity of half-duplex degraded relay channels using polar coding显示文摘In this paper, a novel transmission protocol based on polar coding is proposed for the half-duplex degraded relay channel. In the proposed protocol, referred to as the partial message relaying, the relay only needs to forward a part of the decoded source message that the destination needs according to the exquisite nested structure of polar codes. Theoretically, it is proved that the scheme can achieve the capacity of the half-duplex relay channel under the decode-and-forward(DF) cooperation strategy while enjoying low encoding/decoding complexity. Practically, in order to minimize the global transmission power, the optimization of the power allocation is performed between the source and the relay by using information theoretic tools. Furthermore, a joint iterative soft parallel interference cancellation receiver structure is developed to suit to the proposed scheme.Simulation results show that the proposed scheme outperforms the conventional scheme designed by low-density parity-check(LDPC) codes. | Duo Bin Wang Zhenyong Gu Xuemai Guo Qing | 2014 | Chinese Journal of Aeronautics2014，27，3： | 0 |
| 19 | Interfacial characteristics in CNTs-AgCuTi systems显示文摘AgCuTi-based composite fillers reinforced with Carbon Nanotubes(CNTs) were prepared by mechanical ball milling and ultrasonic agitation. The morphological features, chemical components, and melting characteristics of the composite fillers with different content of CNTs addition were investigated using Field Emission Scanning Electron Microscopy(FESEM), XRay Diffraction(XRD) and a Differential Scanning Calorimeter(DSC). After being heated at 900 ℃, the microstructure of the composite fillers was examined through FESEM and Transmission Electron Microscopy(TEM) to analyze the interfacial characteristics in the AgCuTi-CNTs system.The microstructures of the composite fillers with 0.5 wt% CNTs and 0.1 wt% CNTs were compared. It was found that 0.5 wt% CNTs were favorable for dispersive distribution of the structure.Nano-sized TiC particles formed in the reaction of CNTs with Ti, resulting in the transformation of TiCu;with high Ti content and Ti;Cu;phases to TiCu;phase with low Ti content. Additionally,the microstructure evolution of the composite fillers was studied by changing the ratio of Ti/CNTs.Results showed that CNTs significantly influenced the wettability of the AgCuTi filler. After addition of 0.3 wt% of CNTs, the spreading area of the composite filler on the C/C composite increased by 146.0%. | Duo LIU Bin CHEN Guobiao JIN Yanyu SONG Qi ZHANG Xiaoguo SONG Jian CAO | 2022 | Chinese Journal of Aeronautics2022，35，4： | 0 |
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