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Soil Acidification of Alfisols as Influenced by Tea Cultivation in Eastern China

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Pedosphere 2010年第6期20卷 799-806页

作者： WANG Hui XU ren-Kou WANG Ning LI Xing-Hui Institute of Tea Science Nanjing Agriculture University Nanjing 210095 (China) State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China) College of Food and Bioengineering Henan University of Science and Technology Luoyang 471003 (China)

Soil acidification is an important process in land degradation around the world as well as in *** of Alfisols was investigated in the tea gardens with various years of tea cultivation in the eastern *** of tea plants caused soil acidification and soil acidity increased with the increase of tea cultivation *** pH of composite samples from cultivated layers decreased by 1.37,1.62 and 1.85,respectively,after 13,34 and 54 years of tea plantation,as compared to the surface soil obtained from the unused *** acidification rates at early stages of tea cultivation were found to be higher than those at the later *** acidification rate for the period of 0-13 years was as high as 4.40 kmol H + ha ?1 year ?1 for the cultivated layer *** acidification induced the decrease of soil exchangeable base cations and base cation saturation and thus increased the soil exchangeable *** acidification also caused the decrease of soil cation exchange capacity,especially for the 54-year-old tea *** acidification induced by tea plantation also led to the increase of soil exchangeable Al and soluble Al,which was responsible for the Al toxicity to plants.

关键词： aluminum base cations cation exchange capacity soil exchangeable acidity tea garden

Micro-arc oxidization fabrication and ethanol sensing performance of Fe-doped TiO_2 thin films

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International Journal of Minerals,Metallurgy and Materials 2012年第5期19卷 461-466页

作者： Fu-jian ren Xiao-bai Yu Yun-han Ling Jia-you Feng Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

In-situ pure TiO2 and Fe-doped TiO2 thin films were synthesized on Ti plates via the micro-arc oxidation （MAO） technique. The as-fabricated anatase TiO2 thin film-based conductometric sensors were employed to measure the gas sensitivity to ethanol. The results showed that Fe ions could be easily introduced into the MAO-TiO2 thin films by adding precursor K4（FeCN）6＇3H20 into the NaaPO4 electrolyte. The amount of doped Fe ions increased almost linearly with the concentration of Kg（FeCN）63H20 increasing, eventually affecting the ethanol sensing performances of TiO2 thin films. It was found that the enhanced sensor signals obtained had an optimal concentration of Fe dopant （1.28at%）, by which the maximal gas sensor signal to 1000 ppm ethanol was estimated to be 7.91 at 275℃. The response time was generally reduced by doped Fe ions, which could be ascribed to the increase of oxygen vacancies caused by Fe3＋ substituting for Ti4＋.

关键词： thin films titanium dioxide doping iron micro-arc oxidation ethanol sensors

Inferring three-dimensional surface displacement field by combining SAR interferometric phase and amplitude information of ascending and descending orbits

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Science China Earth Sciences 2010年第4期53卷 550-560页

作者： HU Jun LI ZhiWei ZHU JianJun ren XiaoChong DING XiaoLi Department of Survey Engineering and Geomatics Central South UniversityChangsha 410083China Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong KongChina

Conventional Interferometric Synthetic Aperture Radar(InSAR) technology can only measure one-dimensional surface displacement(along the radar line-of-sight(LOS) direction).Here we presents a method to infer three-dimensional surface displacement field by combining SAR interferometric phase and amplitude information of ascending and descending *** method is realized in three steps:(1) measuring surface displacements along the LOS directions of both ascending and descending orbits based on interferometric phases;(2) measuring surface displacements along the azimuth directions of both the ascending and descending orbits based on the SAR amplitude data;and(3) estimating the three-dimensional(3D) surface displacement field by combining the above four independent one-dimensional displacements using the method of least squares and Helmert variance component *** apply the method to infer the 3D surface displacement field caused by the 2003 Bam,Iran,*** results reveal that in the northern part of Bam the ground surface experienced both subsidence and southwestward horizontal movement,while in the southern part uplift and southeastward horizontal movement *** displacement field thus determined matches the location of the fault very well with the maximal displacements reaching 22,40,and 30 cm,respectively in the up,northing and easting ***,we compare the 3D displacement field with that simulated from the Okada *** results demonstrate that the method presented here can be used to generate reliable and highly accurate 3D surface displacement fields.

关键词： InSAR amplitude matching azimuth offset three-dimensional surface displacement Bam earthquake

Convergence ball and error analysis of Ostrowski-Traub’s method

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Applied Mathematics(A Journal of Chinese Universities) 2010年第3期25卷 374-378页

作者： BI Wei-hong WU Qing-biao ren Hong-min Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Information and Electronics Hangzhou Radio and TV University Hangzhou 310012 China

Under the hypotheses that the second-order and third-order derivatives of a function are bounded, an estimate of the radius of the convergence ball of Ostrowski-Traub＇s method is obtained. An error analysis is given which matches the convergence order of the method. Finally, two examples are provided to show applications of our theorem.

关键词： Ostrowski-Traub's method nonlinear equation convergence ball estimate of radius error analysis

新时代社会主义意识形态建设的创新发展及其经验析论

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南通大学学报（社会科学版） 2024年第1期40卷 1-10,159页

作者：孙绍勇任雯陕西(高校)哲学社会科学重点研究基地“马克思主义创新发展研究中心” 西北工业大学马克思主义学院

意识形态作为观念上层建筑,对经济社会发展具有巨大的反作用。高度重视意识形态建设,牢牢掌握意识形态工作的领导权,是中国共产党的优良传统。新时代以来,面对纷繁复杂的意识形态领域的风险和挑战,中国共产党审时度势、深谋远虑,不断推... 详细信息

意识形态作为观念上层建筑,对经济社会发展具有巨大的反作用。高度重视意识形态建设,牢牢掌握意识形态工作的领导权,是中国共产党的优良传统。新时代以来,面对纷繁复杂的意识形态领域的风险和挑战,中国共产党审时度势、深谋远虑,不断推进社会主义意识形态建设的创新发展。洞察时代大势科学研判社会主义意识形态建设的坐标定位、聚焦本质规律辩证认识社会主义意识形态建设的原则导向、把握历史主动系统优化社会主义意识形态建设的战略举措,深入总结党的十八大以来中国共产党推进社会主义意识形态建设创新发展,以及所积累创造的经验,对于党在新征程上不断提升社会主义意识形态的引领力和凝聚力,进而统一全党全国各族人民的意志和思想,推进全面建设社会主义现代化强国,具有深刻的理论价值和现实意义。

关键词：新时代社会主义意识形态创新发展宝贵经验

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A new combined criterion to better predict malignant lesions in patients with pancreatic cystic neoplasms

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Cancer Biology & Medicine 2018年第1期15卷 70-78页

作者： Chungen Lan Xin Li Xiuchao Wang Jihui Hao He ren Department of Pancreatic Cancer Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Centerfor Cancer Key Laboratory of Cancer Prevention and Therapy TianjinTianjin's Clinical Research Center for CancerTianjin 300060China

Objective:Cystic lesions of the pancreas have been increasingly *** lesions exhibit benign behavior,while others have unequivocal malignant ***,accurate identification of malignancy in patients diagnosed with pancreatic cystic neoplasms(PCNs)remains a major *** aim of this study was to define a combined criterion to better predict malignant lesions in patients with ***:We retrospectively analyzed 165 patients who underwent resection of PCNs from October 2011 to May *** relationship among malignancy and serum carbohydrate antigen 19-9(CA19-9),preoperative neutrophil-to-lymphocyte ratio(NLR),and the presence of enhanced solid component on imaging was ***:NLR before surgery in patients with malignant PCNs(2.81±2.14)was significantly higher than that in patients diagnosed with pancreatic neuroendocrine tumor(1.90±0.69,P=0.013)or healthy volunteers(1.40±0.48;P1.976 and presence of enhanced solid component were independent predictors of PCN malignancy.A combined criterion meeting any two or more of the three elements including CA19-9≥39 U/m L,NLR>1.976,and presence of enhanced solid component on computed tomography imaging is an indicator with a high positive predictive value of 80.5%and a high negative predictive value of 87.9%,and thus,represents a highly accurate test(86.1%).Conclusions:The new combined criterion is an effective predictor of tumor malignancy in patients with PCNs.

关键词： Malignant pancreatic cystic neoplasm neutrophil-lymphocyte ratio enhanced solid component combined criterion diagnosis

Two new diterpenoids from Suregada glomerulata(Blume) Baill

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Chinese Chemical Letters 2011年第5期22卷 580-582页

作者： ren Yi Yan Ruo Yun Chen De Quan Yu Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine Ministry of Education Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing 100700 China

Two new diterpenoids,3,4,18β-cyclopropa-ent-abieta-8（14）,13（15）-dien-16,12-olide（1） and 3-oxojolkinolide B（2）,were isolated from the roots of Suregada glomerulata（Blume） *** structures were determined by sp... 详细信息

关键词： Suregada glomerulata Diterpenoid 3 4 18β-Cyclopropa-ent-abieta-8(14) 13(15)-dien-16 12-olide 3-Oxojolkinolide B Cytotoxicity

Performance evaluation of channel inversion precoding for downlink multi-user MIMO system

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The Journal of China Universities of Posts and Telecommunications 2009年第5期16卷 20-24页

作者： CHEN Zhi-yong , WANG wen-bo, PENG Mu-gen, LI ren Wireless Signal Processing and Network Laboratory, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China [a]Wireless Signal Processing and Network Laboratory Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

In downlink multi-user multi-input multi-output （MU-MIMO） system, not every user （user equipment （UE）） can calculate accurately signal to interference and noise ratio （SINR） without prior knowledge of the other users＇ precoding vector. To solve this problem, this article proposes a channel inversion precoding scheme by using the lower bound of S1NR and zero-forcing （ZF） algorithm. However, the SINR mismatch between lower bound SINR and actual SINR causes the inaccurateness of adaptive modulation and coding （AMC）. As a result, it causes degradation in performance. Simulation results show that channel inversion precoding provides lower throughput than that of single user multi-input multi-output （SU-MIMO） at high signal-to-noise ratio （SNR）（〉14 dB）, due to the SINR mismatch, although the sum-rate of channel inversion precoding is higher than that of SU-MIMO at full SNR regime.

关键词： MU-MIMO channel inversion precoding CQI feedback AMC lower bound S1NR zero-forcing

Nonhuman Primate Model of Oculocutaneous Albinismwith TYR and OCA2 Mutations

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Research 2020年第1期2020卷 135-145页

作者： Kun-Chao Wu Ji-Neng Lv Hui Yang Feng-Mei Yang Rui Lin Qiang Lin ren-Juan Shen Jun-Bin Wang wen-Hua Duan Min Hu Jun Zhang Zhan-Long He Zi-Bing Jin Division of Ophthalmic Genetics The Eye HospitalLaboratory for Stem Cell&Retinal RegenerationInstitute of Stem Cell ResearchWenzhou Medical UniversityWenzhou 325027China National Center for International Research in Regenerative Medicine and Neurogenetics National Clinical Research Center for Ocular DiseasesState Key Laboratory of OphthalmologyOptometry and Visual ScienceWenzhou 325027China Institute of Medical Biology Chinese Academy of Medical SciencesAnd Peking Union Medical College(CAMS&PUMC)Yunnan Key Laboratory of Vaccine Research Development on Severe Infectious DiseaseKunming 650118China Department of Ophthalmology The Second People’s Hospital of Yunnan ProvinceFourth Affiliated Hospital of Kunming Medical UniversityKey Laboratory of Yunnan Province for the Prevention and Treatment of OphthalmologyKunming 650021China Laboratory of Retinal Physiology&Disease The Eye HospitalWenzhou Medical UniversityWenzhou 325027China

Human visual acuity is anatomically determined by the retinal *** ontogenetic development of the fovea can be seriously hindered by oculocutaneous albinism(OCA),which is characterized by a disorder of melanin *** people of all ethnic backgrounds can be affected,no efficient treatments for OCA have been developed thus far,due partly to the lack of effective animal *** macaques are genetically homologous to humans and,most importantly,exhibit structures of the macula and fovea that are similar to those of humans;thus,rhesus macaques present special advantages in the modeling and study of human macular and foveal *** this study,we identified rhesus macaque models with clinical characteristics consistent with those of OCA patients according to observations of ocular behavior,fundus examination,and optical coherence *** sequencing revealed a biallelic p.L312I mutation in TYR and a homozygous p.S788L mutation in OCA2,both of which were further confirmed to affect melanin biosynthesis via in vitro *** rhesus macaque models of OCA will be useful animal resources for studying foveal development and for preclinical trials of new therapies for OCA.

关键词： clinical cutaneous ism