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Contact Angle Prediction Model for Underwater Oleophobic Surfaces Based on Multifractal Theory

China Petroleum Processing & Petrochemical Technology 2023年第3期25卷 37-48页

作者： Jiang huayi You Yanzhen hu juan Tian Dongmei Qi Hongyuan Sun Nana Liu Mei College of Petroleum Engineering Xi’an Shiyou UniversityXi’an 710065ShaanxiChina Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs Xi’an Shiyou UniversityXi’an 710065ShaanxiChina The Second Gas Production Plant Changqing Oilfield CompanyYulin 719000ShaanxiChina

Traditional microstructure scale parameters have difficulty describing the structure and distribution of a roughmaterial’s surface morphology comprehensively and quantitatively. This study constructs hydrophilic and underwateroleophobic surfaces based on polyvinylidene fluoride (PVDF) using a chemical modification method, and the fractaldimension and multifractal spectrum are used to quantitatively characterize the microscopic morphology. A new contactangle prediction model for underwater oleophobic surfaces is established. The results show that the fractal dimension ofthe PVDF surface first increases and then decreases with the reaction time. The uniformity characterized by the multifractalspectrum was generally consistent with scanning electron microscope observations. The contact angle of water droplets onthe PVDF surface is negatively correlated with the fractal dimension, and oil droplets in water are positively *** the fractal dimension is 2.0975, the new contact angle prediction model has higher prediction accuracy. Themaximum and minimum relative deviations of the contact angle between the theoretical and measured data are 18.20%and 0.72%, respectively. For water ring transportation, the larger the fractal dimension and spectral width of the materialsurface, the smaller the absolute value of the spectral difference, the stronger the hydrophilic and oleophobic properties, andthe better the water ring transportation stability.

关键词： contact angle hydrophilic-oleophobic surface polyvinylidene fluoride multifractal prediction model

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HNCO hydrolysis performance in urea-water solution thermohydrolysis process with and without catalysts

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第11期11卷 849-856页

作者： Zhen-chao CHEN Wei-juan YANG Jun-hu ZHOU Hong-kun LV Jian-zhong LIU Ke-fa CEN State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

The thermolysis of urea-water solution and its product, HNCO hydrolysis is investigated in a dual-reactor system. For the thermal decomposition below about 1073 K, the main products are ammonia (NH3) and isocyanic acid (HNCO) whereas at higher temperatures the oxidation processes take effect and the products include a low concentration of nitric oxide (NO) and nitrous oxide (N2O). The gas HNCO is quite stable and a high yield of HNCO is observed. The ratio of NH3 to HNCO increases from approximately 1.2 to 1.7 with the temperature. The chemical analysis shows that H radical is in favor of HNCO hydrolysis by instigating the reaction HNCO+H·→·NH2+CO and high temperature has positive effect on H radical. The hydrolysis of HNCO over an alumina catalyst made using a sol-gel process (designated as γ-Al2O3) is investigated. The conversion of HNCO is high even at the high space velocities (6×105 h-1) and low temperatures (393–673 K) in the tests with catalysts, which enhances HNCO hydrolysis and raises the ratio of NH3 to HNCO to approximately 100. The pure γ-Al2O3 shows a better catalytic performance than CuO/γ-Al2O3. The addition of CuO not only reduces the surface area but also decreases the Lewis acid sites which are recognized to have a positive effect on the catalytic activity. The apparent activation energy of the hydrolysis reaction amounts to about 25 kJ/mol in 393–473 K while 13 kJ/mol over 473 K. The overall hydrolysis reaction rate on catalysts is mainly determined by external and internal mass-transfer limitations.

关键词： Urea-water solution Sol-gel method γ-Al2O3 HNCO hydrolysis

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Quantitative analysis of diffusion-weighted magnetic resonance images:differentiation between prostate cancer and normal tissue based on a computer-aided diagnosis system

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Science China(Life Sciences) 2017年第1期60卷 37-43页

作者： Ge Gao Chengyan Wang Xiaodong Zhang juan hu Xuedong Yang He Wang Jue Zhang Xiaoying Wang Department of Radiology Peking University First HospitalBeijing 100034China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Department of Radiology the First Affiliated Hospital of Kunming Medical UniversityKunming 650032China Department of Radiology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China

Diffusion-weighted imaging(DWI) is considered to be one of the dominant modalities used in prostate cancer(PCa) detection and the assessment of lesion aggressiveness,especially for peripheral zone(PZ) ***-aided diagnosis(CAD),which is capable of automatically extracting and evaluating image features,can integrate multiple parameters and improve the detection of *** this study,13 quantitative image features were extracted from DWI by CAD,and diagnostic efficacy was analyzed in both the PZ and transition zone(TZ).The results demonstrated that there was a significant difference(P<0.05) between PCa and non-PCa for nine of the 13 features in the PZ and five of the 13 features in the ***,the prediction outcome of CAD had a strong correlation with the DWI scores that were graded by experienced radiologists according to the Prostate Imaging-Reporting and Data System Version 2(PI-RADS v2).

关键词： prostate cancer magnetic resonance imaging DWI diagnosis computer-assisted prostate imaging-reporting and datasystem (PI-RADS)

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Novel compound heterozygous mutations in DNAH1 cause primary infertility in Han Chinese males with multiple morphological abnormalities of the sperm flagella

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Asian Journal of Andrology 2023年第4期25卷 512-519页

作者： Meng Wang Qi-Yu Yang Jue-Pu Zhou hui-Ping Tan juan hu Lei Jin Li-Xia Zhu Reproductive Medicine Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

This study aimed to identify genetic causes responsible for multiple morphological abnormalities of the sperm flagella(MMAF)in the Han Chinese *** primary infertile males with completely immobile sperm and MMAF were ***-exome sequencing and Sanger sequencing were performed to identify disease-causing ***,morphological and ultrastructural analyses of sperm flagella were *** probable impact of genetic variants on protein function was analyzed by online bioinformatic tools and immunofluorescence *** patients with dynein axonemal heavy chain 1(DNAH1)gene compound heterozygous variations were ***1 c.7435C>T,p.R2479X and c.10757T>C,p.F3586S were identified in the patient from Family 1,c.11726_11727delCT,p.P3909fs and c.12154delC,p.L4052fs were found in the patient from Family 2,and c.10627-3C>G and c.11726_11727delCT,p.P3909fs existed in the patient from Family *** of these variations have not been reported,and all the mutations showed pathogenicity by functional effect *** absence of the center pair and disorganization of the fibrous sheath were present in sperm flagella at the ultrastructural ***,the expression of DNAH1 was absent in spermatozoa from the participants,validating the pathogenicity of the *** three couples have undergone intracytoplasmic sperm injection(ICSI),and two couples of them became pregnant after the *** conclusion,the newly identified DNAH1 mutations can expand the mutational and phenotypic spectrum of MMAF genes and provide a theoretical basis for genetic diagnosis in MMAF *** is recommended to conduct genetic screening in male infertility patients with MMAF and provide rational genetic counseling,and ICSI might be an optimal strategy to help with fertilization and conception for patients with DNAH1 mutations.

关键词： DNAH1 intracytoplasmic sperm injection male infertility MMAF mutation

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Simplified liver imaging reporting and data system for the diagnosis of hepatocellular carcinoma on gadoxetic acid-enhanced magnetic resonance imaging

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2439-2448页

作者： Rong Lyu Wei-juan hu Di Wang Jiao Wang Yu-Bing Ye Ke-Feng Jia Department of Radiology Tianjin Third Central HospitalTianjin Key Laboratory of Extracorporeal Life Support for Critical DiseasesArtificial Cell Engineering Technology Research CenterTianjin 300170China

BACKGROUND The liver imaging reporting and data system(LI-RADS)diagnostic table has 15 cells and is too *** diagnostic performance of LI-RADS for hepatocellular carcinoma(HCC)is not satisfactory on gadoxetic acid-enhanced magnetic resonance imaging(EOB-MRI).AIM To evaluate the ability of the simplified LI-RADS(sLI-RADS)to diagnose HCC on *** A total of 331 patients with 356 hepatic observations were retrospectively *** diagnostic performance of sLI-RADS A-D using a single threshold was evaluated and compared with LI-RADS v2018 to determine the optimal *** algorithms of sLI-RADS A-D are as follows:The single threshold for sLI-RADS A and B was 10 mm,that is,classified observations≥10mm using an algorithm of 10-19 mm observations(sLI-RADS A)and≥20 mm observations(sLI-RADS B)in the diagnosis table of LI-RADS v2018,respectively,while the classification algorithm remained unchanged for observations0.999).With HBP hypointensity as an MF,the sensitivity of F-sLI-RADS was greater than that of LI-RADS v2018(93.0%vs 87.0%,P<0.001)and sLI-RADS D(93.0%vs 89.8%,P=0.016),without a lower specificity(86.5%vs 90.1%,P=0.062;86.5%vs 89.4%,P=0.125).Compared with that of LI-RADS v2018,the time to classif

关键词： Hepatocellular carcinoma Magnetic resonance imaging Liver Diagnosis Contrast agent

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The Effects of Demographic Features on Differences in Sensitivity between PCL-C and SCL-90 Scores in a Follow-up Study in Secondary School Students in the Wenchuan Earthquake Region

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Biomedical and Environmental Sciences 2011年第6期24卷 642-648页

作者： HOU Feng Su LI Ting LI juan hu Xiao Qin LIU Zhi Yue YUAN Ping Department of Epidemiology West China School of Public Health Sichuan University Chengdu 610041 SichuanChina

Objective To analyze the sensitivity of effect factors between the PCL-C and the SCL-90, to provide evidence for social psychological crisis screening and post-trauma interventions. Methods We administered the PCL-C and SCL-90 to screen for PTSD and other psychological problems among students who survived the disaster and continued their school studies. The surveys were carried out 3, 6, 9, and 12 months after the earthquake. A bivariate 2-level logistic model was used to explore the different levels of sensitivity among students. The factors influencing the relationships between PTSD and depression, and between PTSD and anxiety were examined. Results We analyzed data from 1677 students, revealing that female students in higher grades were more likely to exhibit symptoms of depression, rather than PTSD, compared with the control group （males in lower grades）, and the difference was significant （P〈0.05）. In contrast, ethnic minorities were more likely to exhibit PTSD symptoms compared to the others. In addition, female students were more likely to exhibit symptoms of anxiety than PTSD. Other effects that did not reach statistical significance were suggested to have a similar influence on PTSD, depression, and anxiety. Conclusion After a natural disaster, specific aspects of depression and anxiety should be examined, avoiding an overemphasis on PTSD in social psychological crisis interventions.

关键词： PTSD Depression Anxiety Bivariate 2-Level Logistic Model Students Natural disaster survivors

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Potential Distribution of Alien Invasive Species and Risk Assessment:a Case Study of Erwinia amylovora in China

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Agricultural Sciences in China 2007年第6期6卷 688-695页

作者： CHEN Chen CHEN juan hu Bai-shi IIANG Ying-hua LIU Feng-quan Key Laboratory of Monitoring and Management of Plant Diseases and Insects Ministry of Agriculture Nanjing Agricultural UniversityNanjing 210095 P.R.China

Alien invasive species represent a severe risk to biodiversity and economy, as in the case of fire blight （Erwinia amylovora）, a bacterial disease that originated in North America, which may be released into new locations by means of fruit trade. On the basis of the knowledge of Erwinia amylovora＇s biophysical characteristics and environmental data, the geographic information system （GIS） has been applied to determine areas where Erwinia amylovora can potentially invade China. Temperature and precipitation, during the blossoming period, are considered to be two critical factors affecting the Erwinia amylovora＇s suitable climatic zones. This spatial modeling approach was validated from a case study in Europe, where the occurrence of Erwinia amylovora has been proven. The model prediction agreed with the occurrence of the bacteria recorded in Europe, and the same procedure has been applied to produce a potential establishment area in China＇s two preferential apple cultivation regions, Bohai Bay region and huangtu Altiplano region. It has been found that areas belonging to the high-risk category are more or less the main apple producing areas, accounting for their great economic importance in China. This methodology provides an initial baseline for assessment, prevention, and management of alien species that may become invasive under certain environmental conditions. In addition, this modeling approach provides a tool for policy makers to use, in making decisions on management practices where alien species are involved.

关键词： biological invasions Erwinia amylovora GIS potential distribution risk assessment

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Neuroprotective effects of salidroside on focal cerebral ischemia/reperfusion injury involve the nuclear erythroid 2-related factor 2 pathway

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Neural Regeneration Research 2015年第12期10卷 1989-1996页

作者： Jing Han Qing Xiao Yan-hua Lin Zhen-zhu Zheng Zhao-dong He juan hu Li-dian Chen Institute of Materia Medica Fujian Academy of Traditional Chinese Medicine Fujian University of Traditional Chinese Medicine

Salidroside,the main active ingredient extracted from Rhodiola crenulata,has been shown to be neuroprotective in ischemic cerebral injury,but the underlying mechanism for this neuroprotection is poorly *** the current study,the neuroprotective effect of salidroside on cerebral ischemia-induced oxidative stress and the role of the nuclear factor erythroid 2-related factor 2（Nrf2）pathway was investigated in a rat model of middle cerebral artery ***（30 mg/kg）reduced infarct size,improved neurological function and histological changes,increased activity of superoxide dismutase and glutathione-S-transferase,and reduced malon-dialdehyde levels after cerebral ischemia and ***,salidroside apparently increased Nrf2 and heme oxygenase-1 *** results suggest that salidroside exerts its neuroprotective effect against cerebral ischemia through anti-oxidant mechanisms and that activation of the Nrf2 pathway is *** Nrf2/antioxidant response element pathway may become a new therapeutic target for the treatment of ischemic stroke.

关键词： nerve regeneration traditional Chinese medicine salidroside cerebral ischemia andreperfusion nuclear factor erythroid 2-related factor 2 heme oxygenase-1 middle cerebral arteryocclusion model superoxide dismutase neuroprotection neural regeneration

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Prostate cancer identification: quantitative analysis of T2-weighted MR images based on a back propagation artificial neural network model

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Science China(Life Sciences) 2015年第7期58卷 666-673页

作者： ZHAO Kai WANG ChengYan hu juan YANG XueDong WANG He LI FeiYu ZHANG XiaoDong ZHANG Jue WANG XiaoYing Department of Radiology Peking University First Hospital Academy for Advanced Interdisciplinary Studies Peking University

Computer-aided diagnosis(CAD) systems have been proposed to assist radiologists in making diagnostic decisions by providing helpful information. As one of the most important sequences in prostate magnetic resonance imaging(MRI), image features from T2-weighted images(T2WI) were extracted and evaluated for the diagnostic performances by using CAD. We extracted 12 quantitative image features from prostate T2-weighted MR images. The importance of each feature in cancer identification was compared in the peripheral zone(PZ) and central gland(CG), respectively. The performance of the computer-aided diagnosis system supported by an artificial neural network was tested. With computer-aided analysis of T2-weighted images, many characteristic features with different diagnostic capabilities can be extracted. We discovered most of the features(10/12) had significant difference(P<0.01) between PCa and non-PCa in the PZ, while only five features(sum average, minimum value, standard deviation, 10 th percentile, and entropy) had significant difference in CG. CAD prediction by features from T2 w images can reach high accuracy and specificity while maintaining acceptable sensitivity. The outcome is convictive and helpful in medical diagnosis.

关键词： prostate cancer magnetic resonance imaging T2WI diagnosis computer-assisted

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The Characteristics ofHong Kong＇s Cruise Port Construction and Operation

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International English Education Research 2014年第8期 54-56页

作者： hu juan Shanghai University of Engineering Science

In recent years, China to seize the opportunity of the world＇s cruise industry eastward, the cruise market was developing rapidly. However, due to the late start of the cruise industry in China, all aspects of the cruise homeport construction lack of experience. This article will conduct a comprehensive analysis of all aspects ofHong Kong by cruise port planning concepts, infrastructure, commercial facilities, operating mode, and then summed up the characteristics of its construction operations. And on this basis, we will put forward targeted suggestions on various aspects of Shanghai Wusong cruise port operations and management, to build an international cruise homeport.

关键词： cruise homeport construction and operation suggestions

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