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Purification efficiency of ecological spur dikes for river pollutants in different geometric arrangements:Experiments and numerical modeling

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Journal of Hydrodynamics 2022年第5期34卷 934-947页

作者： yi-tian chen Xiao-ling Wang Song-min Li Ya-zhi Zheng Guang-yao Dong College of Environmental Science and Engineering Tianjin UniversityTianji300350China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin300072China College of Hydraulic Engineering Tianjin Agricultural CollegeTianjin300392China

The traditional ecological spur dike is improved,by using the biological fillers such as the plant materials,combined with microorganisms,to obtain a larger water purification *** of the researches on spur dikes focused on the hydrodynamic force and the migration and the diffusion of the pollutants,but not so much on the effects of the spur dike materials and the arrangement parameters on the water purification *** this paper the biological zeolite is used to make ecological spur *** laboratory flume experiment shows that compared with the natural zeolite spur dike,the purification effect of the biological zeolite spur dike is significantly improved,and the average removal rate of the NH3-N is kept at 6.8%after 24 h compared with 3.5%of the natural zeolite spur *** NH3-N removal rates of a single spur dike,the counterpart spur dikes and the staggered spur dikes decrease with the increase of the inlet flow,and the staggered spur dikes have the best purification ***,a numerical model based on the MIKE21 is verified by the experimental results and applied for the Tangjiali Section of the Xutangqiao River in Xinwu District,Wuxi City,Jiangsu *** orthogonal test shows that the length of the spur dike has the most important effect on the interception of pollutants and the purification,followed by the angle of the spur dike and the spacing of the spur dikes has the least important *** geometric arrangement parameters of the ecological spur dike group with the highest efficiency on the pollutant interception and the purification are:60°(angle),6.7 m(length)and 20 m(spacing).

关键词： Ecological spur dike spur dike group numerical simulation biological zeolite interception purification geometric arrangement parameters

Two New r-process-enhanced Stars with [Fe/H] >-0.6 dex from the LAMOST-MRS Survey

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Research in Astronomy and Astrophysics 2022年第7期22卷 109-117页

作者： Xiao-Jin Xie Jian-Rong Shi tian-Lu chen Hong-Liang Yan tian-yi chen Kai-Ke Pan Chun-Qian Li Shuai Liu Qi Gao Tai-Sheng Yan Ming-yi Ding Department of Physics College of ScienceTibet UniversityLhasa 850000China Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Apache Point Observatory SunspotNew Mexico 88349USA Astronomy Department New Mexico State UniversityLas CrucesNew Mexico 88003USA

We report the discovery of two r-process-enhanced stars with [Fe/H]>-0.6 dex selected from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST) *** candidate stars have been selected from the LAMOST medium-resolution(R~ 7500) spectroscopic survey,and the follo wed-up high signal-to-noise ratio and high-resolution(R~31,500) spectra are obtained with the ARC Echelle Spectrograph mounted on the3.5 m telescope at the Apache Point Observatory,which allow us for the determination of stellar atmospheric parameters and abundances of 20 *** these three r-process-enhanced candidate stars,TYC 1710-933-1 and TYC 2858-372-1 have [Eu/Fe] higher than 0.3 dex and [Ba/Eu] lower than 0.0 dex,thus,can be identified as new r-process-enhanced *** 2858-372-1 shows similar r+s-process pattern to the *** 1710-933-1 presents enhancement of the r-process elements of Nd and *** work indicates that the enrichment mechanisms of the heavy neutron-capture elements are complicated for metal-rich stars.

关键词： stars:abundances stars:chemically peculiar stars:fundamental parameters

Expression and clinical significance of CD73 and hypoxia-inducible factor-1α in gastric carcinoma

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World Journal of Gastroenterology 2013年第12期19卷 1912-1918页

作者： Xiao-Xia Lu yi-tian chen Bing Feng Xiao-Bei Mao Bo Yu Xiao-Yuan Chu Department of Medical Oncology Nanjing General Hospital of Nanjing Military Command Medical School of Nanjing University Department of Pathology Nanjing General Hospital of Nanjing Military Command

AIM: To investigate the expression of CD73 and hypoxia-inducible factor-1α (HIF-1α) in human gastric carcinoma, and explore their clinical significance and prognostic value. METHODS: CD73 and HIF-1α expressions were detected by immunohistochemistry in consecutive sections of tissue samples from 68 gastric carcinoma patients. The peritumor tissues 2 cm away from the tumor were obtained and served as controls. The presence of CD73 and HIF-1α was analyzed by immunohis-tochemistry using the Envision technique. RESULTS: CD73 and HIF-1α expressions in gastric carcinoma were significantly higher than those in gastric mucosal tissues as control (P < 0.001) and showed a close correlation (Spearman r = 0.390, P = 0.001). Overexpression of CD73 was positively correlated with differentiation of tumor (P = 0.000), histopathology (P = 0.041), depth of invasion (P < 0.001), nodal status (P = 0.003), metastasis (P = 0.013), and the American Joint Committee on Cancer (AJCC) stage (P < 0.001). High expression of HIF-1α was positively correlated with tumor diameter (P = 0.031), depth of invasion (P = 0.022), and AJCC stage (P = 0.035). The overall survival rate was low in the patients with high expression of CD73 (P < 0.001). Moreover, CD73+/HIF-1α+ patients had the worst prognosis (P < 0.001). CD73 expression was proven to be an independent predictor for patients with gastric carcinoma by both multivariate Cox regression analysis (P = 0.021) and receiver operating characteristic curves (P = 0.001).CONCLUSION: CD73 expression correlates closely with HIF-1α expression in gastric carcinoma. CD73 could be an independent prognostic indicator for gastric carcinoma.

关键词： CD73 Hypoxia-inducible factor-1α Gastric carcinoma Immunohistochemistry Prognosis

Multichannel direct transmissions of nearfield information

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Light(Science & Applications) 2019年第1期8卷 643-650页

作者： Xiang Wan Qian Zhang tian yi chen Lei Zhang Wei Xu He Huang Chao Kun Xiao Qiang Xiao Tie Jun Cui The State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China National Mobile Communications Research Lab Southeast UniversityNanjing 210096China

A digital-coding programmable metasurface(DCPM)is a type of functional system that is composed of subwavelength-scale digital coding elements with opposite phase *** configuring the digital coding elements,a DCPM can construct dynamic near-field image patterns in which the intensity of each pixel of the image can be dynamically and independently ***,a DCPM can perform both spatial and temporal ***,this advantage is used to realize multichannel direct transmissions of near-field *** points are selected in the near-field region to form three independent *** applying various digital phase codes on the DCPM,independent binary digital symbols defined by amplitude codes(namely,weak and strong amplitudes)are transmitted through the three *** measured near-field distributions and temporal transmissions of the system agree with numerical *** with the conventional multichannel transmission,the proposed mechanism achieves simultaneous spatial and temporal modulations by treating DCPM as an energy radiator and information modulator,thereby enduing DCPM with high potential in near-field information processing and communications.

关键词： field system thereby

Coordinated Control Strategy of New Energy Power Generation System with Hybrid Energy Storage Unit

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Energy Engineering 2025年第1期122卷 167-184页

作者： Yun Zhang ZifenHan Biao tian Ning chen yi Fan School of Mechano-Electronic Engineering Xidian UniversityXi’an710071China Electric Power Control Center State Grid Gansu Electric Power CompanyLanzhou730030China Electric Power Control Center State Grid Gansu Electric Power Company Zhangye Power Supply BranchZhangye734000China

The new energy power generation is becoming increasingly important in the power *** as photovoltaic power generation has become a research hotspot,however,due to the characteristics of light radiation changes,photovoltaic power generation is unstable and random,resulting in a low utilization rate and directly affecting the stability of the power *** solve this problem,this paper proposes a coordinated control strategy for a newenergy power generation system with a hybrid energy storage unit based on the lithium iron phosphate-supercapacitor hybrid energy storage ***,the variational mode decomposition algorithm is used to separate the high and low frequencies of the power signal,which is conducive to the rapid and accurate suppression of the power fluctuation of the energy storage ***,the fuzzy control algorithm is introduced to balance the power between energy *** this paper,the actual data is used for simulation,and the simulation results show that the strategy realizes the effective suppression of the bus voltage fluctuation and the accurate control of the internal state of the energy storage unit,effectively avoiding problems such as overshoot and over-discharge,and can significantly improve the stability of the photovoltaic power generation systemand the stability of the Direct Current *** is of great significance to promote the development of collaborative control technology for photovoltaic hybrid energy storage units.

关键词： Photovoltaic power suppression hybrid energy storage unit variationalmodal decomposition fuzzy control power distribution control

Plasma brain natriuretic peptide and atria natriuretic peptide as predictors for diastolic heart failure in patients with type 2 diabetes mellitus

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Journal of Geriatric Cardiology 2009年第4期6卷 227-229页

作者： yi-tian chen Ting-Song Liu Shi-Sen Jiang Rui-Ji Xu cheng Huang Department of Cardiology Jinling Hospital Nanjing 210002 Jiangsu China Department of Nuclear Medicine Jinling Hospital Nanjing 210002 Jiangsu China Department of Ultrasonics JinlingHospital Nanjing 210002 Jiangsu China

Objective To study the change of diastolic cardiac function in diabetic patients and to determine the diagnostic value of plasma brain natriuretic peptide （BNP） and atria natriuretic peptide （ANP） for diastolic heart failure in patients with type 2 diabetes mellitus. Methods Twelve healthy subjects and seventy-one diabetic patients were included in the study. Plasma BNP and ANP were measured with immtmoradiometic assay. Results Plasma levels of BNP and ANP increased significantly with increased severity of diastolic heart dysfunction. The ratio of E/A had significant negative correlation with the plasma levels ofBNP （r=0.669,P〈0.001） and ANP （r=0.579, P〈0.01）. AUC of ANP and BNP in ROC model was 91.9% and 65.3%, respectively. Conclusions The plasma level of BNP might be a valuable predictor for differential diagnosis of diastolic cardiac function in diabetic patients.

关键词： diabetes mellitus brain natriuretic peptide atria natriuretic peptide diastolic heart failure

Searching for r-process-enhanced stars in the LAMOST surveyⅠ:the method

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Research in Astronomy and Astrophysics 2021年第2期21卷 89-96页

作者： tian-yi chen Jian-Rong Shi Timothy CBeers Hong-Liang Yan Qi Gao Chun-Qian Li Hai-Ning Li Gang Zhao CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Department of Physics and JINA Center for the Evolution of the Elements University of Notre DameNotre DameIN 46556USA

The abundance patterns of r-process-enhanced stars contain key information required to constrain the astrophysical site(s)of r-process nucleosynthesis,and to deepen our understanding of the chemical evolution of our *** expand the sample of known r-process-enhanced stars,we have developed a method to search for candidates in the LAMOST medium-resolution(R7500)spectroscopic survey by matching the observed spectra to synthetic templates around the EuⅡline at 6645.1 *** obtain a sample of 13 metal-poor(-2.35<[Fe/H]<-0.91)candidates from 12209 unique stars with 32774 mediumresolution *** candidates will be further studied by high-resolution follow-up observations in the near *** describe some extensions of this effort to include larger samples of stars,in particular at lower metallicity,using the strength of the BaⅡline at 6496.9 A.

关键词： stars abundances-stars chemically peculiar-stars statistics

3D Modeling Quantitative Evaluation for the Underground Space Resources in Beijing City

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地学前缘 2009年第S1期16卷 283-284页

作者： yi tian,Jianping chen,Limei Wang School of Land Resources and Technology,China University of Geosciences(Beijing),Beijing 100083,China.

Recently,underground space evaluation has become fundamental for a city’s long term sustainable development *** paper,based on the 3D-GIS tools,adopts"multi-factors comprehensive evaluation"models to establish a prac... 详细信息

关键词： city underground space resources quantitative evaluation 3D modeling

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遥感影像分类方法研究进展

光谱学与光谱分析 2011年第10期31卷 2618-2623页

作者：贾坤李强子田亦陈吴炳方中国科学院遥感应用研究所北京100101 中国科学院研究生院北京100049

遥感影像分类是遥感信息提取的重要手段,是目前遥感技术中的热点研究内容。分类方法是遥感影像分类的重要内容,有效地选择合适的分类方法是提高分类精度的关键。随着遥感技术的发展,传统的非参数分类方法已经难以满足分类精度需求,基于... 详细信息

遥感影像分类是遥感信息提取的重要手段,是目前遥感技术中的热点研究内容。分类方法是遥感影像分类的重要内容,有效地选择合适的分类方法是提高分类精度的关键。随着遥感技术的发展,传统的非参数分类方法已经难以满足分类精度需求,基于智能算法的非参数分类方法得到了迅速发展,并在遥感影像分类中发挥着重要作用。近年来,组合分类器由于能够利用单一分类器的互补信息,成为了遥感影像分类的一个新热点。本文综合分析了各种分类方法的特点和优势,及分类方法的发展趋势,为遥感影像分类技术的发展提供科学的参考依据。

关键词：遥感分类分类器