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149篇 您的检索式:作者名="Zun"
    题名 作者 年代 出处 被引量
1λ-Central BMO Estimates for Commutators of Singular Integral Operators with Rough Kernels显示文摘作者在中央 Morrey 空格用不平的核为单个不可分的操作员的整流器建立 λ-central BMO 估计。而且,中央 Morrey 空格的产品上的 multisublinear 操作符的一个类的围住的海角被讨论。作为它的特殊情况,多线性的考尔德ó n -Zygmund 操作员和多线性的部分不可分的操作员的相应结果能分别地被推出。Zun Wei FU Yan LIN Shan Zhen LU 2008Acta Mathematica Sinica,English Series2008,24,3:20
2Single-center experience of 309 consecutive patients with obscure gastrointestinal bleeding显示文摘AIM: To investigate the diagnostic yield of capsule endoscopy (CE) in patients with obscure gastrointestinal bleeding (OGIB), and to determine whether the yield was affected by different bleeding status. METHODS: Three hundred and nine consecutive patients (all with recent negative gastric and colonic endoscopy results) were investigated with CE; 49 cases with massive bleeding and 260 cases with chronic recurrent overt bleeding. Data regarding OGIB were obtained by retrospective chart review and review of an internal database of CE fi ndings.RESULTS: Visualization of the entire small intestine was achieved in 81.88% (253/309) of cases. Clinically positive findings occurred in 53.72% (166/309) of cases. The positivity of the massive bleeding group was slightly higher than that of the chronic recurrent overt bleeding group but there was no significant difference (59.18% vs 52.69%, P > 0.05) between the two groups. Small intestinal tumors were the most common fi nding in the entire cohort, these accounted for 30% of clinically signifi cant lesions. In the chronic recurrent overt bleeding group angioectasia incidence reached more than 29%, while in the massive bleedinggroup, small intestinal tumors were the most common finding at an incidence of over 51%. Increasing patient age was associated with positive diagnostic yield of CE and the findings of OGIB were different according to age range. Four cases were compromised due to the capsule remaining in the stomach during the entire test, and another patient underwent emergency surgery for massive bleeding. Therefore, the complication rate was 1.3%. CONCLUSION: In this study CE was proven to be a safe, comfortable, and effective procedure, with a high rate of accuracy for diagnosing OGIB.Bing-Ling Zhang You-Hong Fang Chun-Xiao Chen You-Ming Li Zun Xiang 2009World Journal of Gastroenterology2009,15,45:14
3Uptake of HIV Self-testing among Men Who have Sex with Men in Beijing, China: a Cross-sectional Study显示文摘Objective To examine HIV self-testing uptake and its determinates among men who have sex with men(MSM) in Beijing, China. Methods A cross-sectional online survey was conducted in Beijing, China in 2016. Participants were users of a popular Chinese gay networking application and had an unknown or negative HIV status. Univariate and multivariate logistic regression analyses were conducted to examine factors associated with HIV self-testing based on adjusted odds ratio(AOR) and 95% confidence interval(CI). Results Among the 5,996 MSM included in the study, 2,383(39.7%) reported to have used HIV self-testing kits. Willingness to use an HIV self-test kit in the future was expressed by 92% of the participants. High monthly income(AOR = 1.49; CI = 1.10-2.02; P = 0.010), large number of male sex partners(≥ 2: AOR = 1.24; CI = 1.09-1.43; P = 0.002), sexual activity with commercial male sex partners(≥ 2: AOR = 1.94; CI = 1.34-2.82; P = 0.001), long-term drug use(AOR = 1.42; CI = 1.23-1.62; P < 0.001), and long-term HIV voluntary counseling and testing(VCT) attendance(AOR = 3.62; CI = 3.11-4.22; P < 0.001) were all associated with increased odds of HIV self-testing uptake. Conclusion The nearly 40% rate of HIV self-testing uptake among MSM in our sample was high. In addition, an over 90% willingness to use kits in the future was encouraging. HIV self-testing could be an important solution to help China achieve the global target of having 90% of all people living with HIV diagnosed by 2020.REN Xian Long WU Zun You MI Guo Dong MCGOOGAN Jennifer ROU Ke Ming ZHAO Yan 2017Biomedical and Environmental Sciences2017,30,6:13
4miRNA-133a-UCP2 pathway regulates inflammatory bowel disease progress by influencing inflammation, oxidative stress and energy metabolism显示文摘AIM To investigate the role of the mi R-133a-UCP2 pathway in the pathogenesis of inflammatory bowel disease(IBD)and to explore the potential downstream mechanisms with respect to inflammation,oxidative stress and energy metabolism.METHODS C57BL/6 mice were fed dextran sulfate sodium(DSS)liquid for 7 consecutive days,followed by the administration of saline to the DSS group,UCP2 si RNA to the UCP2 group and a mi R-133a mimic to the mi R-133a group on days 8 and 11.Body weight,stool consistencyand rectal bleeding were recorded daily,and these composed the disease activity index(DAI)score for the assessment of disease severity.After cervical dislocation was performed on day 14,the length of the colon in each mouse was measured,and colonic tissue was collected for further study,which included the following:haematoxylin and eosin staining,UCP2 and mi R-133a detection by immunohistochemical staining,western blot and quantitative real-time PCR,measurement of apoptosis by TUNEL assay,and the assessment of inflammation(TNF-α,IL-1β,IL-6 and MCP1),oxidative stress(H2O2 and MDA)and metabolic parameters(ATP)by ELISA and colorimetric methods.RESULTS An animal model of IBD was successfully established,as shown by an increased DAI score,shortened colon length and specific pathologic changes,along with significantly increased UCP2 and decreased mi R-133a levels.Compared with the DSS group,the severity of IBD was alleviated in the UCP2 and the mi R-133a groups after successful UCP2 knockdown and mi R-133a overexpression.The extent of apoptosis,as well as the levels of TNF-α,IL-1β,MDA and ATP,were significantly increased in both the UCP2 and mi R-133a groups compared with the DSS group.CONCLUSION The mi R-133a-UCP2 pathway participates in IBD by altering downstream inflammation,oxidative stress and markers of energy metabolism,which provides novel clues and potential therapeutic targets for IBD.Xi Jin Dong Chen Ruo-Heng Zheng Hong Zhang Yi-Peng Chen Zun Xiang 2017World Journal of Gastroenterology2017,23,1:11
5Double-balloon enteroscopy in small bowel tumors: A Chinese single-center study显示文摘AIM: To analyze the clinical characteristics of small bowel tumors detected by double-balloon enteroscopy (DBE) and to evaluate the diagnostic value of DBE in tumors. METHODS: Four hundred and forty consecutive DBE examinations were performed in 400 patients (250 males and 150 females, mean age 46.9 ± 16.3 years, range 14-86 years) between January 2007 and April 2012. Of these, 252 patients underwent the antegrade approach, and 188 patients underwent the retrograde approach. All the patients enrolled in our study were suspected of having small bowel diseases with a negative etiological diagnosis following other routine examinations, such as upper and lower gastrointestinal endoscopy and radiography tests. Data on tumors, such as clinical information, endoscopic findings and opera-tion results, were retrospectively collected. RESULTS: Small bowel tumors were diagnosed in 78 patients, of whom 67 were diagnosed using DBE, resulting in a diagnostic yield of 16.8% (67/400); the other 11 patients had negative DBE findings and were diagnosed through surgery or capsule endoscopy. Adenocarcinoma (29.5%, 23/78), gastrointestinal stromal tumor (24.4%, 19/78) and lymphoma (15.4%, 12/78) were the most common tumors. Among the 78 tumors, 60.3% (47/78) were located in the jejunum, and the overall number of malignant tumors was 74.4% (58/78). DBE examinations were frequently performed in patients with obscure gastrointestinal bleeding (47.4%) and abdominal pain (24.4%). The positive detection rate for DBE in the 78 patients with small bowel tumors was 85.9% (67/78), which was higher than that of a computed tomography scan (72.9%, 51/70). Based on the operation results, the accuracy rates of DBE for locating small bowel neoplasms, such as adenocarcinoma, gastrointestinal stromal tumor and lymphoma, were 94.4%, 100% and 100%, respectively. The positive biopsy rates for adenocarcinoma and lymphoma were 71.4% and 60%, respectively. CONCLUSION: DBE is a useful diagnostic tool with high clinical practice value and should be considered the gold standard for the investigation of small bowel tumors.Wen-Guo Chen Guo-Dong Shan Hong Zhang Lin Li Min Yue Zun Xiang Ying Cheng Chen-Jiao Wu Ying Fang Li-Hua Chen 2013World Journal of Gastroenterology2013,19,23:11
6Helicobacter pylori and Crohn's disease: A retrospective single-center study from China显示文摘AIM: To investigate the association between Helicobacter pylori (H. pylori ) infection and the prevalence of Crohn's disease (CD). METHODS: Subjects were selected from patients admitted the gastrointestinal (GI) department at The First Affiliated Hospital School of Medicine (Zhejiang University)for abdominal pain, hematochezia, diarrhea and other GI symptoms between January 2008 and September 2012. CD was diagnosed by endoscopy and biopsy. H. pylori infection was detected by a 14 C-urea breath test and culturing of the biopsy sample. Demographic, anthropometric and serologic data were collected for each patient. H. pylori infection rate was compared between CD and control groups, followed by a subgroup analysis based on extent and severity of CD. Student's t , Mann-Whiney U , and χ 2 tests were used to analyze the data. RESULTS: A total of 447 patients were analyzed, including 229 in the CD group and 248 in the control group. There were no significant differences in age, sex, and rates of hypertension or diabetes. However, the CD group showed significantly higher rates of smoking history (34.9% vs 18.1%), alcohol intake (17.4% vs 8.1%), white blood cell count (9.7 ± 2.9 × 10 9 /L vs 4.3 ± 0.9 × 10 9 /L), and C-reactive protein (36.3 ± 20.8 mg/L vs 5.5 ± 2.3 mg/L) but lower body mass index (24.5 ± 2.0 kg/m 2 vs 26.0 ± 2.2 kg/m 2 ) than the control group. The H. pylori infection rate in the CD group was 27.1%, significantly lower than that of 47.9% in the control group. Furthermore, the H. pylori infection rates in patients with colonic, small intestine, ileocolonic and extensive CD were 31.1%, 28.9%, 26.8% and 25.9% respectively, all of which were significantly lower than in the control group. Finally, the H. pylori infection rates in patients with remission, moderate and severe CD were 34.3%, 30.7% and 22.0% respectively, which were also significantly lower than in the control group. CONCLUSION: Lower H. pylori infection in CD patients suggests a correlation between bacterial infection and CD, suggesting caution when considering H. pylori eradication in CD patients.Zun Xiang Yi-Peng Chen Yue-Fang Ye Kui-Fen Ma Shao-Hua Chen Lin Zheng Yi-Da Yang Xi Jin 2013World Journal of Gastroenterology2013,19,28:9
7Sharp Estimates of p-Adic Hardy and Hardy-Littlewood-Pólya Operators显示文摘In this paper we get the sharp estimates of the p-adic Hardy and Hardy-Littlewood-Pólya operators on Lq(|x|αpdx). Also, we prove that the commutators generated by the p-adic Hardy operators(Hardy-Littlewood-Pólya operators) and the central BMO functions are bounded on Lq(|x|αpdx), more generally, on Herz spaces.Zun Wei FU Qing Yan WU Shan Zhen LU 2013Acta Mathematica Sinica,English Series2013,29,1:5
8Molecular Characteristics of Neisseria meningitidis Isolated during an Outbreak in a Jail: Association with the Spread and Distribution of ST-4821 Complex Serogroup C Clone in China显示文摘Objective To characterize the meningococcal strains isolated from cases and close contacts with meningococcal disease associated with an outbreak in a jail in May 2010 by investigating the national distribution of hyperinvasive ST-4821 serogroup C clone associated with this outbreak. Methods The cases were described based on the clinical symptoms and laboratory results. Pharyngeal swabs were cultured for N. meningitidis from men in the jail. Meningococcal isolates were identified by serogrouping, pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST), respectively. Four hundred and sixteen serogroup C N. meningitidis strains were collected from 27 provinces between 2003 and 2010 for a nationwide survey and analyzed by PFGE and MLST. Results Three persons in a jail system were infected with invasive N. meningitidis serogroup C. All isolates tested had matching PFGE patterns and belonged to the multilocus sequence type (ST) 4821 clonal complex. All 47 N. meningitidis strains were identified from the pharyngeal swabs of 166 peoples in the jail, and 26 of them belonged to ST-4821 serogroup C clone, and 90.14% (375/416) serogroup C strains identified in the nationwide survey belonged to the ST-4821 complex. The ST-4821 serogroup C clone was spread nationwide, distributed in 24 provinces, especially in eastern provinces between 2003 and 2010. Conclusion Endemic transmission and carriage rate of ST-4821 serogroup C clone are high in this jail system. The ST-4821 serogroup C clone is spreading in China and nationwide distributed despite the existence of some effective vaccines.ZHANG Ji ZHOU Hai Jian XU Li HU Guang Chun ZHANG Xue Hua XU Sheng Ping LIU Zun Yu SHAO Zhu Jun 2013Biomedical and Environmental Sciences2013,26,5:5
9Monte Carlo simulation fused with target distribution modeling via deep reinforcement learning for automatic high-efficiency photon distribution estimation显示文摘Particle distribution estimation is an important issue in medical diagnosis. In particular, photon scattering in some medical devices extremely degrades image quality and causes measurement inaccuracy. The Monte Carlo(MC) algorithm is regarded as the most accurate particle estimation approach but is still time-consuming, even with graphic processing unit(GPU) acceleration. The goal of this work is to develop an automatic scatter estimation framework for high-efficiency photon distribution estimation. Specifically, a GPU-based MC simulation initially yields a raw scatter signal with a low photon number to hasten scatter generation. In the proposed method, assume that the scatter signal follows Poisson distribution, where an optimization objective function fused with sparse feature penalty is modeled. Then, an over-relaxation algorithm is deduced mathematically to solve this objective function. For optimizing the parameters in the over-relaxation algorithm, the deep Q-network in the deep reinforcement learning scheme is built to intelligently interact with the over-relaxation algorithm to accurately and rapidly estimate a scatter signal with the large range of photon numbers.Experimental results demonstrated that our proposed framework can achieve superior performance with structural similarity >0.94, peak signal-to-noise ratio >26.55 d B, and relative absolute error <5.62%, and the lowest computation time for one scatter image generation can be within 2 s.Jianhui Ma Zun Piao Shuang Huang Xiaoman Duan Genggeng Qin Linghong Zhou Yuan Xu 2021Photonics Research2021,9,3:5
10Plasma long noncoding RNA expression profile identified by microarray in patients with Crohn's disease显示文摘AIM: To investigate the expression pattern of plasma long noncoding RNAs(lnc RNAs) in Chrohn's disease(CD) patients.METHODS: Microarray screening and q RT-PCR verification of lnc RNAs and m RNAs were performed in CD and control subjects, followed by hierarchy c l u s t e r i n g, G O a n d K E G G p a t h w a y a n a l y s e s. Significantly dysregulated lnc RNAs were categorized into subgroups of antisense lnc RNAs, enhancer lnc RNAs and linc RNAs. To predict the regulatory effect of lnc RNAs on m RNAs, a CNC network analysis was performed and cross linked with significantly changed lnc RNAs. The overlapping lnc RNAs were randomly selected and verified by q RT-PCR in a larger cohort. RESULTS: Initially, there were 1211 up-regulated and 777 down-regulated lnc RNAs as well as 1020 up-regulated and 953 down-regulated m RNAs after microarray analysis; a heat map based on these results showed good categorization into the CD and control groups. GUSBP2 and AF113016 had the highest fold change of the up- and down-regulated lnc RNAs, whereas TBC1D17 and CCL3L3 had the highest foldchange of the up- and down-regulated m RNAs. Six(SNX1, CYFIP2, CD6, CMTM8, STAT4 and IGFBP7) of 10 m RNAs and 8(NR_033913, NR_038218, NR_036512, NR_049759, NR_033951, NR_045408, NR_038377 and NR_039976) of 14 lnc RNAs showed the same change trends on the microarray and q RT-PCR results with statistical significance. Based on the q RT-PCR verified m RNAs, 1358 potential lnc RNAs with 2697 positive correlations and 2287 negative correlations were predicted by the CNC network. CONCLUSION: The plasma lnc RNAs profiles provide preliminary data for the non-invasive diagnosis of CD and a resource for further specific lnc RNA-m RNA pathway exploration.Dong Chen Jiang Liu Hui-Ying Zhao Yi-Peng Chen Zun Xiang Xi Jin 2016World Journal of Gastroenterology2016,22,19:5
11Ion engine grids:Function,main parameters,issues,configurations,geometries,materials and fabrication methods显示文摘Ion optics are crucial components of ion thrusters and the study of the different ion extraction solutions used since the beginning of the electric propulsion era is essential to understand the evolution of ion engines. This work describes ion engine grids' main functions, parameters and issues related to thermal expansion and sputter erosion, and then introduces a review of ion optics used for significant launched and tested ion thrusters since 1970. Configurations, geometries, materials and fabrication methods are analyzed to understand when typical ion thrusters use two or three grids, what are the thicknesses and aperture sizes of the screen, accelerator and decelerator grids, why molybdenum and carbon-based materials such as pyrolytic graphite and carbon–carbon are the best available options for ion optics and what is the manufacturing method for each material.Miguel SANGREGORIO Kan XIE Ningfei WANG Ning GUO Zun ZHANG 2018Chinese Journal of Aeronautics2018,31,8:4
12Uncoupling protein and nonalcoholic fatty liver disease显示文摘JIN Xi XIANG Zun CHEN Yi-peng MA Kui-fen YE Yue-fang LI You-ming 2013Chinese Medical Journal2013,,16:4
13β-hydroxy-β-methylbutyrate Improves Chronic Renal Failure-Induced Sarcopenia in SD Rats by Regulating Autophagy显示文摘Background Chronic renal failure-induced sarcopenia(CRF-S)seriously affects public health by increasing morbidity and mortality.This study evaluated the therapeutic effects ofβ-hydroxy-β-methylbutyrate acid(HMB)and the underlying mechanism in an adenine-induced CRF-S rat model.Methods Sprague Dawley rats were divided into control,model(CRF-S),and HMB treatment(CRF-S+HMB)groups.The rats in the CRF-S group received 250 mg/kg/d adenine by oral gavage every day for 14 days,followed by administration every other day until the 28th day.In the CRF-S+HMB group,each rat was given 320 mg/kg/d HMB by oral gavage starting from 7 days prior to adenine treatment,and this treatment was maintained for a total of 35 days.The body weight,right anterior tibial muscle weight,blood serum parameters,gastrocnemius muscle and renal tissue histology,and expression of autophagy-related transcripts and proteins were evaluated.Results A rat model of CRF-S was successfully established via adenine gavage,as indicated by reduced body weight and muscle weights,and markers of sarcopenia.There were increased mRNA levels of LC3B,Beclin1,Ulk1,Atg5,Atg7,Atg13 and vps-34,and increased protein expression levels of LC3B and P62.In the rats with HMB intervention,the body weight,right anterior tibial weight and gastrocnemius muscle histology were not significantly different from those in the control group,and the expression levels of autophagy-related proteins(LC3B and P62)were consistent with those in the control group.Conclusion We successfully established a rat model of CRF-S using adenine administered via oral gavage,and observed that HMB treatment prevented CRF-S.Zun Yue Zhang Liu Qing Yang Ya Nan Yang Yun Lin Wang Long Mei Zhang Kun Hua Wang Min Weng 2021Journal of Nutritional Oncology2021,6,4:4
14A Centralized Report on Pediatric Japanese Encephalitis Cases from Beijing Children's Hospital,2013显示文摘Fifteen pediatric cases of suspected Japanese encephalitis(JE)were reported in Beijing Children’s Hospital during the late summer of 2013.The clinical manifestations in most cases included high fever,seizures,and abnormal magnetic resonance imaging findings.Twelve of 15 cases were laboratory-confirmed as JE cases by pathogen identification.Epidemiological investigations showed that five of the 12LI Jiu Wei GAO Xiao Yan WU Yun FU Shi Hong TAN Xiao Juan CAO Yu Xi ZHANG Wei Hua YIN Zun Dongs HE Ying LI Yi Xing LIANG Guo Dong XU Wen Bo FANG Fang WANG Huan Yu 2016Biomedical and Environmental Sciences2016,29,12:4
15High-purity magnesium pin enhances bone consolidation in distraction osteogenesis via regulating Ptch protein activating Hedgehog-alternative Wnt signaling显示文摘Magnesium alloys are promising biomaterials for orthopedic implants because of their degradability,osteogenic effects,and biocompatibility.Magnesium has been proven to promote distraction osteogenesis.However,its mechanism of promoting distraction osteogenesis is not thoroughly studied.In this work,a high-purity magnesium pin developed and applied in rat femur distraction osteogenesis.Mechanical test,radiological and histological analysis suggested that high-purity magnesium pin can promote distraction osteogenesis and shorten the consolidation time.Further RNA sequencing investigation found that alternative Wnt signaling was activated.In further bioinformatics analysis,it was found that the Hedgehog pathway is the upstream signaling pathway of the alternative Wnt pathway.We found that Ptch protein is a potential target of magnesium and verified by molecular dynamics that magnesium ions can bind to Ptch protein.In conclusion,HP Mg implants have the potential to enhance bone consolidation in the DO application,and this process might be via regulating Ptch protein activating Hedgehog-alternative Wnt signaling.Musha Hamushan Weijie Cai Yubo Zhang Zun Ren Jiafei Du Shaoxiang Zhang Changli Zhao Pengfei Cheng Xiaonong Zhang Hao Shen Pei Han 2021Bioactive Materials2021,6,6:3
16Three antibacterial naphthoquinone analogues from cultured mycobiont of lichen Astrothelium sp显示文摘新 naphthoquinone 混合物和二已知的混合物 trypethelone 把 7-hydroxyl-8-methoxyltrypethelone 称为 3 1 和 trypethelone 甲基醚 2 从 Astrothelium sp 的有教养的 mycobiont 被孤立。结构被 1D 和 2D NMR 分光镜的分析阐明以及有那些的比较在文学报导了。化合物 1 对杆菌 subtilis (ATCC 6633 ) 显示了重要抗菌剂活动,并且对葡萄球菌 aureus 关口(MRSA )(CGMCC 1.2465 ) 显示出谦虚抗菌剂活动,当时对肠球菌 faecalis 850E (CGMCC 1.2135 ) 和 S 加重 2 和 3 显示出的谦虚抗菌剂活动。aureus 关口(MRSA )(CGMCC 1.2465 ) 。Li Yan Sun Zhen Liang Liu Tao Zhang Shu Bin Niu Zun Tian Zhao 2010Chinese Chemical Letters2010,21,7:3
17A Constant Potential Molecular Dynamics Simulation Study of the Atomic-Scale Structure of Water Surfaces Near Electrodes显示文摘Summary of main observation and conclusion Novel and technologically important processes and phenomena arise at water surfaces in the presence of electric fields.However,experimental measurements on water surfaces are challenging,and the results are scarce and inconclusive.In this work,the constant potential molecular dynamics method,in which the electrode charges are allowed to fluctuate to keep the electric potential fixed,was implemented in the study of a near-electrode water surface systems.This simulation system was set up with a vapor/liquid-water/vapor slab and two electrodes under different sets of applied electrostatic potential,yielding i)a detailed characterization of the external E-field dependent electrostatic potential/density/dipole moment density profiles,and ii)the relationship between the water surface width and the applied electrode voltage differences which has been rarely reported.The adjustments in the number density profiles in the vicinity of water surfaces due to external E-fields were observed,while the capillary interfacial widths for the surfaces near both cathode and anode were found with different increment rates under increasing E-fields.By examining dipole density profiles across the water surfaces,we found that external E-field induced polarization occurs in both bulk and surface regimes,yet the surface polarization densities vary asymmetrically with respect to the increasing E-fields.Detailed discussions were carried out to explain the correlation between water surface tension and surface widths,as well as the interplay between the surface polarization densities and the hydrogen bond network structure.We conclude that the mechanical and structural properties of the water surfaces could be tuned by both magnitude and direction of the strong external E-fields.We also recognize that more surface properties with application value,such as dielectric permittivity tensor or surface potential,could also be regulated by the external E-fields.Pengli Yang Zhenxing Wang Zun Liang Hongtao Liang Yang Yang 2019Chinese Journal of Chemistry2019,37,12:2
18Molecular Characterization of Anisotropic Musielak–Orlicz Hardy Spaces and Their Applications显示文摘Let A be an expansive dilation on R^n and φ:R^n× [0,∞)→[0,∞) an anisotropic Musielak–Orlicz function.Let H_A~φ(R^n) be the anisotropic Hardy space of Musielak–Orlicz type defined via the grand maximal function.In this article,the authors establish its molecular characterization via the atomic characterization of H_A~φ(R^n).The molecules introduced in this article have the vanishing moments up to order s and the range of s in the isotropic case(namely,A:=2I_(n×n)) coincides with the range of well-known classical molecules and,moreover,even for the isotropic Hardy space H^p(R^n)with p∈(0,1](in this case,A:=2I_(n×n),φ(x,t) :=t^p for all x∈R^n and t∈[0,∞)),this molecular characterization is also new.As an application,the authors obtain the boundedness of anisotropic Calderón–Zygmund operators from H_A~φ(R^n) to L~φ(R^n) or from H_A~φ(R^n) to itself.Bao De LI Xing Ya FAN Zun Wei FU Da Chun YANG 2016Acta Mathematica Sinica,English Series2016,32,11:2
19Measurement and Evolution of High-quality Development Level of Marine Fishery in China显示文摘High-quality development of marine fisheries provides an important advantage for China to build itself into a maritime power and implement the Blue Granary Plan effectively.Based on the concepts of‘new development’,‘food security’,and the six dimensions of‘openness,innovation,coordination,green,sharing,and security’,in this study,we established an evaluation index system for the high-quality development of China’s marine fishery sector.We applied the entropy method to evaluate the high-quality development level of China’s marine fishery sector from 2000 to 2016 and explored its spatial and temporal evolution rules.Our results indicated that:1)from 2000 to 2016,China’s marine fishery sector was in the primary stage of high-quality development;2)spatially,the highquality development of marine fisheries showed an upward trend in all provinces,autonomous regions,and municipalities in the country(not including Hong Kong,Macao and Taiwan of China),and with time,the distribution pattern changed from single to multi-polarization;3)temporally,the development level of high-quality marine fisheries fluctuated during the study period.From 2000 to 2010,the growth rate in openness was relatively slow,but after 2010,it increased rapidly.Notably,innovation is the driving force for high-quality development.The green and security factors provide a solid guarantee for high-quality development.In the high-quality development of a region,economic development is better coordinated,and the distribution of benefits is more inclusive.This study provides a theoretical basis to formulate effective marine fishery policies for the high-quality development of the marine fishery sector in China.Exploring the high-quality development and evolution process of marine fishery is conducive to promoting the sustainable development of marine fishery industry,ensuring marine fishery food security,and alleviating global food crisis.LI Bo LIU Zun 2022Chinese Geographical Science2022,32,2:2
20Spin-Tunneling Time in Ferromagnetic/Semiconductor/Ferromagnetic Three-Terminal Heterojunction in the Presence of Rashba Spin-Orbit Coupling显示文摘ZHANG Ying-Tao XIE Zun LI You-Cheng 2006Communications in Theoretical Physics2006,46,5X:2
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