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| 1 | The thermoelastic excitation of air-solid interface waves using the pulsed laser显示文摘Applying the integral transform to the coupled problem of thermoelastic and heat conduction equations, the integral representation of the normal displacement field for the air-solid interface waves excited by a pulsed laser line source is obtained. The pole residues of the integrand are performed analytically, and the transient displacement field is calculated by using FFT technique. The thermoelastic excitation and detection of the air-solid interface waves is carried out by a laser ultrasonic system, on which the pulsed laser is focused into a line source onto the interface to excite the air-solid interface waves: leaky Rayleigh wave and Scholte wave, and the interface waves displacement signal is detected successfully by a SH130 laser heterodyne interferometer. The theoretic and experimental results are in good agreement. | HU Wenxiang QIAN Menglu | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，2： | 4 |
| 2 | Ultrasonic displacement field generated by laser pulse line source显示文摘Applying the Fourier transform to the wave equations of elastic medium at its surface a laser pulse line source is acted, the integral representations of solutions are obtained. Displacement waveforms are calculated numerically by using double FFT. The calculated results include the displacements of the elastic half space of Aluminum medium, and epicenter and off-epicenter of an Aluminum plate. The two exciting sources of thermoelastic and ablating generation are considered respectively. The experiment was made on the Aluminum medium with a Nd:YAG laser and the normal displacement signals are detected by a laser interferometer. The numerical results are quite in agreement with experiments. | HU Wenxiang QIAN Menglu (Institute of Acoustics, Tongji University Shanghai 200092) | 2000 | Chinese Journal of Acoustics2000，19，2： | 4 |
| 3 | Impact of COVID-2019 on stroke services in China: survey from the Chinese Stroke Association显示文摘Background The COVID-19 pandemic and physical distancing guidelines have compelled stroke practices worldwide to reshape their delivery of care significantly.We aimed to illustrate how the stroke services were interrupted during the pandemic in China.Methods A 61-item questionnaire designed on Wenjuanxing Form was completed by doctors or nurses who were involved in treating patients with stroke from 1 February to 31 March 2020.Results A total of 415 respondents completed the online survey after informed consent was obtained.Of the respondents,37.8%,35.2%and 27.0%were from mild,moderate and severe epidemic areas,respectively.Overall,the proportion of severe impact(reduction>50%)on the admission of transient ischaemic stroke,acute ischaemic stroke(AIS)and intracerebral haemorrhage(ICH)was 45.0%,32.0%and 27.5%,respectively.Those numbers were 36.9%,27.9%and 22.3%;36.5%,22.1%and 22.6%;and 66.4%,47.5%and 41.1%in mild,moderate and severe epidemic areas,respectively(all p<0.0001).For AIS,thrombolysis was moderate(20%-50%reduction)or severely impacted(>50%),as reported by 54.4%of the respondents,while thrombectomy was 39.3%.These were 44.4%,26.3%;44.2%,39.4%;and 78.2%,56.5%,in mild,moderate and severe epidemic areas,respectively(all p<0.0001).For patients with acute ICH,39.8%reported the impact was severe or moderate for those eligible for surgery who had surgery.Those numbers were 27.4%,39.0%and 58.1%in mild,moderate and severe epidemic areas,respectively.For staff resources,about 20%(overall)to 55%(severe epidemic)of the respondents reported moderate or severe impact on the on-duty doctors and nurses.Conclusion We found a significant reduction of admission for all types of patients with stroke during the pandemic.Patients were less likely to receive appropriate care,for example,thrombolysis/thrombectomy,after being admitted to the hospital.Stroke service in severe COVID-19 epidemic areas,for example,Wuhan,was much more severely impacted compared with other regions in China. | Xia Wang Menglu Ouyang Cheryl Carcel Chen Chen Lingli Sun Jie Yang Yao Zhang Guofang Chen Shoujiang You Yongjun Cao Lu Ma Xin Hu Yi Sui Craig Anderson Lili Song Yongjun Wang David Wang | 2020 | Stroke & Vascular Neurology2020，5，4： | 2 |
| 4 | Surpassing electrocatalytic limit of earth-abundant Fe^(4+)embedded in N-doped graphene for(photo)electrocatalytic water oxidation显示文摘Developing highly active,cost-effective,and environmental friendly oxygen evolution reaction(OER)electrocatalysts facilitates various(photo)electrochemical processes.In this work,Fe3N nanoparticles encapsulated into N-doped graphene nanoshells(Fe_(3)N@NG)as OER electrocatalysts in alkaline media were reported.Both the experimental and theoretical comparison between Fe_(3) N@NG and Fe_(3)N/NG,specifically including in situ Mossbauer analyses,demonstrated that the NG nanoshells improved interfacial electron transfer process from Fe_(3)N to NG to form high-valence Fe^(4+)ions(Fe^(4+)@NG),thus modifying electronic properties of the outer NG shells and subsequently electron transfer from oxygen intermediate to NG nanoshells for OER catalytic process.Meanwhile,the NG nanoshells also protected Fe-based cores from forming OER inactive and insulated Fe_(2)O_(3),leading to high OER stability.As a result,the as-formed Fe^(4+)@NG shows one of the highest electrocatalytic efficiency among reported Fe-based OER electrocatalysts,which can as well highly improve the photoelectrochemical water oxidation when used as the cocatalysts for the Fe_(2)O_(3) nanoarray photoanode. | Wenjia Xue Feng Cheng Menglu Li Wenjian Hu Congping Wu Bing Wang Kuowei Liao ZhenTao Yu Yingfang Yao Wenjun Luo Zhigang Zou | 2021 | Journal of Energy Chemistry2021，30，3： | 2 |
| 5 | Measurement of acoustic field radiated by low frequency power ultrasonic transducer with laser-interferometer显示文摘Based on the piezo-optic effect of medium, the refractive index of medium is the function of its density, and so it’s also the function of acoustic pressure. Therefore, acoustic pressure in the optical path everywhere can be determined absolutely by laser-interferometric technique and relative distribution of pressure in the middle and far acoustic field, which can be obtained from theory or experiment respectively. Theory and experiment of measurement of pressure in acoustic field with laser-interferometer are introduced. Distribution of pressure radiated by a power ultrasonic transducer is determined by laser interferometric technique. The theoretical and experimental results are in good agreement. The receiving sensitivity of a PVDF (Polyvinylidene fluoride) transducer in free field is also calibrated absolutely due to above results and its sensitivity is -118.5 dB. | QIAN Menglu GAO Wen HU Wenxiang (Institute of Acoustics, Tongji University Shanghai 200092) | 2000 | Chinese Journal of Acoustics2000，19，4： | 2 |
| 6 | A noise and artifact suppression using resampling(NASR)method to facilitate de novo protein structure determination显示文摘Background The search of heavy atoms is crucial to the de novo determination of protein structures.Typically,the difference Patterson map is calculated as a first step to solve substructure.However,the pseudo-peaks and noises inherent in such maps arising from the high symmetry and large size of protein structures accompanied with the data collection errors inevitably pose a challenge in accurate real space-based substructure determination.Purpose In order to mitigate such pseudo-peaks and noises and further improve signal-to-noise ratio(SNR)of the difference Patterson map,the noise and artifact suppression using resampling(NASR)method originally proposed in nuclear magnetic resonance is introduced into protein crystallography in this work to optimize the difference Patterson map.Methods The NASR method makes use of the statistical learning theory,which in this work repeatedly samples a fixed portion of diffraction data(sub-dataset)randomly followed by a statistical analysis of the multiple calculated difference Patterson maps to discard pseudo-peaks and noises.Its feasibility is based on the fact that the true vector peaks of the heavy atoms keep static in the multiple random sub-datasets,whereas the pseudo-peaks and noises fluctuate remarkably.And the key of this method lies in the design of a weighting function to distinguish true vector peaks from pseudo-peaks and noises,as well as a proper selection of the parameters associated with the function.Results The introduced NASR method is both numerically and experimentally demonstrated to be feasible in suppressing spurious peaks and non-correlative noises intrinsic to the difference Patterson maps.As a result,the SNR of the difference Patterson maps can be enhanced to some extent to facilitate real space-based substructure determination.Conclusion It is therefore anticipated that the proposed method may provide a meaningful insight into how to denoise the difference Patterson maps,which in turn assists in locating heavy atoms and further facilitates de novo protein structure determination. | Menglu Hu Zengqiang Gao Qiang Zhou Zhi Geng Yuhui Dong | 2019 | Radiation Detection Technology and Methods2019，3，3： | 1 |
| 7 | The thermoelastic excitation of air-solid interface waves using the pulsed laser显示文摘 | Wenxiang Hu Menglu Qian | 2004 | Science in China Series G: Physics and Astronomy2004，，2： | 1 |
| 8 | An iterative refinement method combining detector geometry optimization and diffraction model refinement in serial femtosecond crystallography显示文摘Background Recent advances in serial femtosecond crystallography(SFX)using X-ray free electron lasers(XFELs)have facilitated accurate structure determination for biological macromolecules.However,given the many fluctuations inherent in SFX,the acquisition of SFX data of sufficiently high quality still remains challenging.Method Aimed at enhancing the accuracy of SFX data,this study proposes an iterative refinement method to optimally match pairs of the observed and predicted reflections on the detector plane.This method features a combination of detector geometry optimization and diffraction model refinement in an alternate manner,concomitant with a cycle-by-cycle peak selection procedure.Result To demonstrate whether this iterative method is convergent and feasible,both numerical simulations and experimental tests have been performed.The results reveal that this method can gradually improve overall quality of the integrated SFX data and therefore accelerate the convergence of Monte Carlo integration,while simultaneously suppressing correlations inherent in certain parameters and precluding outliers to some extent during the refinement.Conclusion We have demonstrated that our iterative refinement method is applicable to both simulated and experimental SFX data.It is expected that this method could provide meaningful insights into the refinement of SFX data and take the step forward toward more accurate Monte Carlo integration. | Zhi Geng Menglu Hu Zhun She Qiang Zhou Zengqiang Gao Yuhui Dong | 2018 | Radiation Detection Technology and Methods2018，2，1： | 0 |
| 9 | Usefulness of Dale’s Cone of Experience in the Context of Learning显示文摘Ⅰ.What Cone of Experience Is Experiences var y from sensing concrete objects to indirect sensing abstract symbols and concepts. These experiences could be classified into levels according to their degree to abstractness (Dale, 1946). A modal called Cone of Experience, developed by Dale (1946), demonstrates the varied experiences, from direct, firsthand participation to pictorial representation and on to purely symbolic expression. This ten-band pyramid is divided into three stages in accordance with their degree to abstractness which is characterized respectively by doing, obser ving and symbolizing. | Menglu HU | 2019 | 校园英语2019，，47： | 0 |
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