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Chinese Medical Journal 2018年第3期131卷 361-363页

作者： Mo-Han Ju Yu-Long Yao Chun-ling du Shu Chen Yuan-lin Song Department of Pulmonary Medicine Zhongshan Hospital Fudan University Shanghai 200032 China Department of Critical Care Medicine Shanghai Seventh People's Hospital Shanghai University of Chinese Traditional MedicineShanghai 201203 China Department of Respiratory Medicine Qingpu Branch of Zhongshan Hospital Fudan University Shanghai 201700 China Department of Infectious Disease Huashan Hospital Fudan University Shanghai 200040 China

Acinetobacter baumannii has been considered the prevailing pathogen responsible for ventilator-associated pneumonia （VAP）,a condition associated with high morbidity and mortality,among patients in Intensive Care Units （ICUs）. However,data regarding VAP caused by *** （AbVAP） in China are *** this retrospective study,we aimed to assess the clinical features and outcomes of Chinese patients with AbVAP and thus identify risk factors for 30-day ICU mortality.

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Corrosion Study of Two-step Deposition Coatings on Copper Foil

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 911-916页

作者：师慧娟唐云志 TAN Yuhui LIAO Shuling ZHANG Yusong du Pengkang School of Materials Metallurgy and Chemical EngineeringJiangxi University of Science and TechnologyGanzhou341000China

To improve corrosion inhibition performance of copper foil with a novel two-step electrochemical modification processes,the surface of 35μm copper foils was coated with graphene oxide(GO)via electrochemical method at first step,then was further coated with 3-aminopropyltrimethoxysilane(APTS)at the second *** the first step the copper foil acted as anode,and as cathode for the second one(we labeled it as E-GO).Optimum coating parameters for the preparation of E-GO coating are 5 V and 1 min with ratio of APTS/deionized water(DI)1.5/98.5(v/v).The physicochemical properties of modified coating were studied by X-ray diffraction(XRD),scanning electron microscopy(SEM)and hydrophilicity *** behavior of different samples were also *** experimental results indicate that anti-corrosion performance is significantly improved with two-step modified *** E-GO coating shows more positive corrosion potential and the highest corrosion resistance rate than others according to the Tafel *** is also found that surface hydrophobicity of E-GO coating is significantly improved.

关键词： graphene oxide silane coupling agent electrochemical deposition corrosion resistance

Horseshoe kidney with retrocaval ureter： one case report

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Chinese Medical Journal 2012年第3期125卷 543-545页

作者： Shen Long-liang Yang Pei-qian du lin-dong Lu Wen-cheng Tian Ye Capital Med Univ Beijing Friendship Hosp Dept Urol Beijing 100050 Peoples R China

Horseshoe kidney and retrocaval ureter are uncommon congenital anomalies of the genitourinary system that are easily diagnosed by typical imaging features. Both anomalies presenting in one patient is a rare disease characterized by isthmus of horseshoe kidney between the abdominal aorta and inferior vena cava. The clinical diagnosis and treatment of horseshoe kidney with retrocaval ureter remain a challenge. Here, we reported a case of a 44-year-old man with the two anomalies who was preoperatively diagnosed by unenhanced computed tomography scanning immediately after retrograde pyelography. The literatures on such combined anomalies are reviewed and the diagnostic evaluation and surgical management of this rare entity are discussed.

关键词： horseshoe kidney retrocaval ureter congenital anomaly

Prospects for Solar-Induced Chlorophyll Fluorescence Remote Sensing from the SIFIS Payload Onboard the TECIS-1 Satellite

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Journal of Remote Sensing 2022年第1期2022卷 77-85页

作者： Shanshan du Xinjie Liu Jidai Chen Liangyun Liu Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China University of Chinese Academy of Sciences Beijing 100049China

The importance of solar-induced chlorophyll fluorescence(SIF)to monitoring vegetation photosynthesis has attracted much attention from the ecological and remote sensing research ***-borne SIF products have been obtained owing to the rapid development of atmospheric satellites in recent *** SIF Imaging Spectrometer(SIFIS)is a payload onboard the upcoming Terrestrial Ecosystem Carbon Inventory Satellite(TECIS-1)that is specifically designed for SIF *** conducted an in situ experiment to evaluate the performance of SIFIS on spectral measurement and SIF retrieval through comparison to the commercial spectrometer QE *** the spatiotemporal mismatch between the collected measurements of the two spectrometers,the radiance spectra obtained synchronously by SIFIS and QE Pro showed a high level of *** SIF retrieval,normalized difference vegetation index(NDVI),and near-infrared radiance of vegetation(NIRvR)results for a push-broom image shows consistent spatial distributions over both vegetated and nonvegetated surfaces.A quantitative comparison was conducted by strictly filtering matching *** the far-red band,a high correlation was obtained between the SIF retrieval performances of SIFIS and QE Pro with R^(2)=0:70 and RMSE=0:30mWm^(−2)sr^(−−1)nm^(−1).However,a relatively poor correlation was observed for the red band with an R^(2)value of 0.23 and an RMSE of 0.26 mWm^(−2)sr^(-−1)nm^(−1).Despite the large uncertainties associated with this experiment,the results indicate that TECIS-1 should offer a reliable SIF monitoring performance after its launch.

关键词： Fluorescence normalized strictly

A Finite Volume Method for the Multi Subband Boltzmann Equation with Realistic 2D Scattering in Double Gate MOSFETs

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Communications in Computational Physics 2011年第7期10卷 305-338页

作者： Tiao Lu Gang du Xiaoyan Liu Pingwen Zhang School of Mathematical Sciences LMAM and CAPTPeking UniversityBeijing 100871China Institute of Microelectronics Peking UniversityBeijing 100871China

We propose a deterministic solver for the time-dependent multi-subband Boltzmann transport equation(MSBTE)for the two dimensional(2D)electron gas in double gate metal oxide semiconductor field effect transistors(MOSFETs)with flared out source/drain contacts.A realistic model with six-valleys of the conduction band of silicon and both intra-valley and inter-valley phonon-electron scattering is *** propose a second order finite volume method based on the positive and flux conservative(PFC)method to discretize the Boltzmann transport equations(BTEs).The transport part of the BTEs is split into two *** is a 1D transport problem in the position space,and the other is a 2D transport problem in the wavevector *** order to reduce the splitting error,the 2D transport problem in the wavevector space is solved directly by using the PFC method instead of splitting into two 1D *** solver is applied to a nanoscale double gate MOSFET and the current-voltage characteristic is *** of the numerical results with ballistic solutions show that the scattering influence is not ignorable even when the size of a nanoscale semiconductor device goes to the scale of the electron mean free path.

关键词： Double gate MOSFET multi subband Boltzmann transport equation 2D electron gas deterministic solver PFC method

DNA repair gene XRCC1 polymorphisms and susceptibility to childhood acute lymphoblastic leukemia: a meta-analysis

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Chinese Journal of Cancer Research 2013年第4期25卷 405-415页

作者： Juan du Cong Lu Guohui Cui Yan Chen Jing He Department of Hematology Union HospitalTongji Medical CollegeHuazhong University of Science and Technology

Objective： To estimate the relationship between genetic polymorphisms of X-ray repair cross- complementing group 1 （XRCC1） and the susceptibility to childhood acute lymphoblastic leukemia （ALL）. Methods： Relevant case-control studies were enrolled in the meta-analysis. We applied Rev Man 4.2 software to pool raw data and test studies＇ heterogeneity and to calculate the incorporated odds ratio （OR） and 95% confidence interval （95% CI）. Results： Our data showed that the OR for the Gln allele of the Arg399Gln polymorphism, compared with the Arg allele, was 1.35 （95% CI, 1.16-1.57; P〈0.0001） for childhood ALL patients. Similarly, the homozygous genotype Gln/Gln and heterozygous genotype Arg/Gln both significantly increased the risk of childhood ALL compared with the wild genotype Arg/Arg （OR =1.58; 95% CI, 1.13-2.21; P=0.008; OR =1.51; 95% CI, 1.21-1.87; P=0.0002）. The dominant model of Arg399Gln was associated with childhood ALL risk （OR =1.54; 95% CI, 1.25-1.89; P〈0.0001）. The ethnic subgroup analysis demonstrated that the Gln allele in all five ethnic groups was prone to be a risk factor for childhood ALL just with different degrees of correlation while Arg194Trp SNP showed a protective or risk factor or irrelevant thing in different races. Conclusions： XRCC1 399 polymorphism may increase the risk of childhood ALL. Different ethnic groups with some gene polymorphism have different disease risks.

关键词： X-ray repair cross-complementing group 1 (XRCC1) gene polymorphism childhood acute lymphoblastic leukemia (ALL)

Fabrication of multilayer films from regenerated cellulose and graphene oxide through layer-by-layer assembly

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Progress in Natural Science:Materials International 2012年第4期22卷 341-346页

作者： Li Tang Xiang Li De du Chunju He College of Materials Science and Engineering Donghua University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

A key challenge in the preparation of nanoplatelet-filled polymer composites is the ability to realize the nanometer-level dispersion and the planar orientation of nanosheets in polymer matrices. In this report, multilayer films were successfully fabricated by layer-by-layer assembly of regenerated cellulose and graphene oxide, in which graphene oxide nanosheets were used as the building blocks. The thickness of 50 layer film is about 20 mm and it exhibits a high degree of smoothness. This may be attributed to the well-defined layered structure with high degree of planar orientation and nanolevel assemblies of graphene oxide nanosheets in the polymer matrices. Typical field emission scanning electron microscope images demonstrate an ordered arrangement of layers. The electrical conductivity of the multilayer films shows a remarkable increase with increasing layer of the films. A significant enhancement of mechanical properties has been achieved, that is, a 110.8% improvement of elastic modulus and a 262.5% increase of hardness respectively.

关键词： Regenerated cellulose Graphene oxide Layer-by-layer assem-bly Multilayer films

Corrosion products of reverse crevice corrosion of copper

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International Journal of Minerals,Metallurgy and Materials 2011年第3期18卷 320-324页

作者： lin Lu Xiao-gang Li School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Open-circuit potential measurements and Raman spectroscopy were used to investigate the reverse crevice corrosion phenomenon and its corresponding corrosion products. With the aid of these techniques, the existence of reverse-crevice corrosion in copper was verified, i.e., while the surface of a crevice was corrosion free, the outside surface of the copper was attacked. The processes associated with this phe-nomenon were classified into three phases, and different compositions of the corrosion products were determined. Raman spectra showed that copper and Cu2O were found in the crevice, while CuO, Cu2O, and CuCl2 were the corrosion products on the bold surface. Based on these findings, a hypothesis relating to the three phases of reverse crevice corrosion has been proposed.

关键词： copper corrosion potential crevice corrosion corrosion products Raman spectroscopy

Pulse signal detection in cognitive UWB system

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The Journal of China Universities of Posts and Telecommunications 2012年第3期19卷 74-79页

作者： SONG Xiao-ou XIANG Xin BI du-yan DENG Yong Engineering College Air Force Engineering.UniversityXi'an 710038China

According to the problem of cognitive ultra wide-band （UWB） spectrum sensing, a novel UWB pulse signal detection algorithm based on cumulative sum （CUSUM） test is proposed in this paper. Based on the analysis of the existing spectrum sensing schemes for cognitive UWB system, some obvious facts are obtained that it is difficult to detect UWB pulse signal with conventional spectrum sensing schemes, due to its low average signal to noise ratio （SNR）, large bandwidth, and low duty ratio. In this paper the detection algorithm of signal distribution change, which is application of CUSUM test, is considered to be applied to cognitive UWB spectrum sensing. But CUSUM test request that the pre-change and the post-change distributions are i.i.d, which cannot be satisfied in the detection process of UWB pulse signal. Since there are two time domain descriptions on UWB pulse signal, namely one contains only noise and the other one contains pulse signal plus noise, the existing detection algorithm of signal distribution change cannot be directly applied to detect UWB pulse signal. Hence the uniform probability density function expression of UWB pulse signal is first deduced, then CUSUM test is applied to cognitive UWB spectrum sensing. The proposed algorithm is a time sequential detection algorithm, with low complexity and minimal detection delay, which is suitable to detect the low duty ratio signal. Its performance is evaluated through theoretical analysis and numerical simulations. It is shown that this algorithm outperforms the conventional energy detection algorithm and conquers SNR wall phenomenon.

关键词： cognitive UWB (CUWB) spectrum sensing pulse signal CUSUM

Shape-controlled synthesis of highly monodisperse and small size gold nanoparticles

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Science China Chemistry 2007年第4期50卷 494-500页

作者： FU YunZhi du YuKou YANG Ping LI JinRu JIANG Long Department of Chemistry Suzhou UniversitySuzhou 215006China Key Laboratory of Colloids and Surfaces Institute of ChemistryChinese Academy of SciencesBeijing 100080China

We describe here that fine control of nanoparticle shape and size can be achieved by systematic varia-tion of experimental parameters in the seeded growth procedure in aqueous solution. Cubic and spherical gold nanoparticles are obtained respectively. In particularly, the Au cubes are highly mono-disperse in 33±2 nm diameter. The experimental methods involve the preparation of Au seed particles and the subsequent addition of an appropriate quantity of Au seed solution to the aqueous growth solutions containing desired quantities of CTAB and ascorbic acid (AA). Here, AA is a weak reducing agent and CTAB is not only a stable agent for nanoparticles but also an inductive agent for leading increase in the face of nanoparticle. Ultraviolet visible spectroscopy (UV-vis), X-ray diffraction (XRD), transmission electron microscopy (TEM) are used to characterize the nanoparticles. The results show that the different size gold nanoparticles displayed high size homogenous distribution and formed mono-membrane at the air/solid interface.

关键词： Au cubes seed grow up cetyltrimethylammoniumbromide (CTAB) ascorbic acid (AA)