检索结果-南通市图书馆

Acta Mathematica Sinica,English Series 2009年第8期25卷 1289-1296页

作者： yun hu Department of Mathematics Soochow University Suzhou 215006 P. R. China

We study the fixed point sets of subgroups of modular groups acting on Teichmiiller spaces.

关键词： Teichmiiller space modular group allowable mapping

Improved Hardy–Littlewood–Sobolev Inequality on S^(n)under Constraints

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2023年第11期39卷 2149-2163页

作者： yun yun hu Jing Bo DOU School of Mathematics and Statistics Shaanxi Normal UniversityXi’an 710119P.R.China

In this paper,we establish an improved Hardy–Littlewood–Sobolev inequality on Snunder higher-order moments ***,by constructing precise test functions,using improved Hardy–Littlewood–Sobolev inequality on S^(n),we show such inequality is almost optimal in critical *** an application,we give a simpler proof of the existence of the maximizer for conformal Hardy–Littlewood–Sobolev inequality.

关键词： Hardy–Littlewood–Sobolev inequality higher-order moments constraint concentration compactness principle almost optimal

Isomorphisms of fiber spaces over Teichmüller spaces

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2006年第7期49卷 877-892页

作者： hu yun SHEN Yuliang Department of Mathematics Suzhou University Suzhou 215006 China Department of Mathematics Suzhou University Suzhou 215006 China

We will be mainly concerned with some important fiber spaces over Teichmuller spaces, including the Bers fiber space and Teichmuller curve, establishing an isomorphism theorem between 'punctured' Teichmuller curves an... 详细信息

关键词： Teichmuller space Bers fiber space 'punctured' fiber space Teichmuller curve 'punctured' Teichmuller curve biholomorphic isomorphism.

Aldo-Keto reductase 1C3 reduces myocardial cell damage after acute myocardial infarction by activating the Kelch-like ECH-associated protein 1-nuclear factor erythroid 2-related factor 2-antioxidant response element pathway to inhibit ferroptosis

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2024年第9期21卷 899-912页

作者： Wang MIAO yun-Zhao hu Department of Cardiology Shunde HospitalSouthern Medical Universitythe First People’s Hospital of ShundeFoshanChina The Second School of Clinical Medicine Southern Medical UniversityGuangzhouChina

Background Acute myocardial infarction(AMI)is a high-risk cardiovascular condition associated with increased cellular damage and oxidative ***-Keto Reductase 1C3(AKR1C3)is a stress-regulating ***,its specific role and mechanisms regarding AMI remain *** We assessed cardiac function through echocardiography;tissue damage was evaluated using Hematoxylin and Eosin(HE)and Masson trichrome ***1C3 expression levels were measured through Reverse transcription-quantitative polymerase chain reaction and western *** cell viability using Cell Counting Kit-8 and lactate dehydrogenase(LDH)*** extent of ferroptosis was determined by measuring the levels of Fe2+,boron-dipyrromethane(BODIPY)and malondialdehyde(MDA),the glutathione/glutathione disulfide(GSH/GSSG)ratio,and the expression of Glutathione Peroxidase 4(GPX4)and Solute carrier 7A11(SLC7A11).Kelch-like ECH-associated protein 1-Nuclear factor erythroid 2-related factor 2-Antioxidant response element(Keap1-Nrf2-ARE)pathway activation was analyzed through western ***2 was inhibited with ML385and activated with(R)-Sulforaphane to investigate the Keap1-Nrf2-ARE *** The rats in the AMI group displayed reduced heart function,more tissue damage,and lower AKR1C3 expression compared to the Sham ***,hypoxia-treated H9C2 cells showed reduced viability,and decreased AKR1C3 *** AKR1C3 in H9C2 cells enhanced *** down AKR1C3 exhibited the opposite *** the inhibitors tested,Ferrostatin-1 most effectively restored cell viability in hypoxia-treated H9C2 ***,H9C2 cells subjected to hypoxia suggested Keap1-Nrf2-ARE pathway *** AKR1C3 reduced ferroptosis and activated the Keap1-Nrf2-ARE pathway in hypoxia-treated cells,knocking down AKR1C3 exhibited the opposite *** experiments using ML385 in hypoxia-treated H9C2 cells with overexpressed AKR1C3 showed decreased viabil

关键词： damage Antioxidant myocardial

在线全文

学校读者我要写书评

暂无评论

On Strebel points

Science China Mathematics 2009年第9期52卷 2019-2026页

作者： hu yun SHEN YuLiang Department of Mathematics Soochow UniversitySuzhou 215006China

Any Beltrami coefficient μ on a hyperbolic Riemann surface X of infinite type represents a point [μ]T in the Teichmüller space T (X) and a point [μ]B in the tangent space of T (X) at the base point as well. The paper deals with the problem of determining whether that [μ]T is a Strebel point is equivalent to that [μ]B is an infinitesimal Strebel point.

关键词： Teichmüller space Strebel point infinitesimal Strebel point 32G15 30C62 30F60

Special column:solar energy conversion

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2019年第2期13卷 205-206页

作者： yun Hang hu Fangming JIN Department of Materials Science and Engineering Michigan Technological University Houghton MI 49931 USA School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

It is a great challenge to meet the increasing energy requirement due to the increase of the population and the improvement of the living standard. As the largest single available source of clean energy, the sun deposits 120000 TW of radiation on the earth. The efficient use of solar energy would be a promising solution for the energy issue. Therefore, great efforts were made to develop solar technologies, such as solar cells, photocatalysis, photoelectrical catalysis, and photothermal devices. In this special column, six articles in solar energy conversion have been accepted for publication.

关键词： Special column solar energy conversion a great challenge

Correspondence between quantum-optical transform and classical-optical transform explored by developing Dirac＇s symbolic method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of physics 2012年第3期7卷 261-310页

作者： Hong-yi Fan Li-yun hu Department of Physics Shanghai Jiao Tong UniversityShanghai 200030China College of Physics&Communication Electronics Jiangxi Normal UniversityNanchang 330022China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China

By virtue of the new technique of performing integration over Dirac＇s ket-bra operators, we ex- plore quantum optical version of classical optical transformations such as optical Fresnel transform, Hankel transform, fractional Fourier transform, Wigner transform, wavelet transform and Fresnel- Hadmard combinatorial transform etc. In this way one may gain benefit for developing classical optics theory from the research in quantum optics, or vice-versa. We cannot only find some new quantum mechanical unitary operators which correspond to the known optical transformations, de- riving a new theorem for calculating quantum tomogram of density operators, but also can reveal some new classical optical transformations. For examples, we find the generalized Fresnel opera- tor （GFO） to correspond to the generalized Fresnel transform （GFT） in classical optics. We derive GFO＇s normal product form and its canonical coherent state representation and find that GFO is the loyal representation of symplectic group multiplication rule. We show that GFT is just the transformation matrix element of GFO in the coordinate representation such that two successive GFTs is still a GFT. The ABCD rule of the Gaussian beam propagation is directly demonstrated in the context of quantum optics. Especially, the introduction of quantum mechanical entangled state representations opens up a new area in finding new classical optical transformations. The complex wavelet transform and the condition of mother wavelet are studied in the context of quantum op- tics too. Throughout our discussions, the coherent state, the entangled state representation of the two-mode squeezing operators and the technique of integration within an ordered product （IWOP） of operators are fully used. All these have confirmed Dirac＇s assertion：＂...for a quantum dynamic system that has a classical analogue, unitary transformation in the quantum theory is the analogue of contact transformation in the classical theory＂.

关键词： Dirac's symbolic method IWOP technique entangled state of continuum variables entangled Fresnel transform Collins formula Generalized Fresnel operator complex wavelet trans-form complex Wigner transform complex fractional Fourier transform symplectic wavelet trans-form entangled symplectic wavelet transform Symplectic-dilation mixed wavelet transform frac-tional Radon transform new eigenmodes of fractional Fourier transform

Efficient multi-event monitoring using built-in search engines

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2016年第2期10卷 281-291页

作者： Zhaoman ZHONG Zongtian LIU yun hu Cunhua LI School of Computer Engineering Huaihai Institute of Technology Lianyungang 222006 China School of Computer Engineering and Science Shanghai University Shanghai 200072 China

Users of the internet often wish to follow certain news events, and the interests of these users often overlap. General search engines （GSEs） cannot be used to achieve this task due to incomplete coverage and lack of freshness. Instead, a broker is used to regularly query the built-in search engines （BSEs） of news and social media sites. Each user defines an event profile consisting of a set of query rules called event rules （ERs）. To ensure that queries match the semantics of BSEs, ERs are transformed into a disjunctive normal form, and separated into conjunctive clauses （atomic event rules, AERs）. It is slow to process all AERs on BSEs, and can violate query submission rate limits. Accordingly, the set of AERs is reduced to eliminate AERs that are duplicates, or logically contained by other AERs. Five types of event are selected for experimental comparison and analysis, including natural disasters, accident disasters, public health events, social security events, and negative events of public servants. Using 12 BSEs, 85 ERs for five types of events are defined by five users. Experimental comparison is conducted on three aspects： event rule reduction ratio, number of collected events, and that of related events. Experimental results in this paper show that event rule reduction effectively enhances the efficiency of crawling.

关键词： information retrieval event retrieval event monitoring BSEs event rule reduction

Experimental investigation and correlations for proppant distribution in narrow fractures of deep shale gas reservoirs

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第2期19卷 619-628页

作者： Hao Zeng Yan Jin Hai Qu yun-hu Lu College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China College of Petroleum Engineering Chongqing University of Science and TechnologyChongqing401331China

Hydraulic fracturing is a crucial stimulation for the development of deep shale gas reservoirs.A key challenge to the effectiveness of hydraulic fracturing is to place small proppants in complex narrow fractures *** experiments with varied particle and fluid parameters are carried out in a narrow planar channel to understand particle transport and *** four dimensionless parameters,including the Reynold number,Shields number,density ratio,and particle volume fraction,are introduced to describe the particle transport in narrow *** results indicate that the narrow channel probably induces fluid fingers and small particle aggregation in a highly viscous fluid,leading to particle settlement near the *** low viscous fluid is beneficial to disperse particles further into the fracture,especially in the high-speed fluid *** linear and natural logarithmic laws have relationships with dimensionless parameters *** multiple linear regression method developed two correlation models with four dimensionless parameters to predict the bed equilibrium height and covered area of small particles in narrow *** study provides fundamental insight into understanding small size proppant distribution in deep reservoirs.

关键词： Proppant transport Multiphase flow Hydraulic fracturing Deep reservoir Narrow fractures

Practice of precision surgery in primary liver cancer

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2021年第2期20卷 108-109页

作者： yun hu Zhen-hua Shen Department of Pathology Huzhou Traditional Chinese Medicine Hospital Affiliated to Zhejiang Chinese Medical UniversityHuzhou 313000China Department of General Surgery Huzhou Central HospitalHuzhou 313003China

Primary liver cancer(PLC)is mainly composed of three major cancer:intrahepatic cholangiocarcinoma,hepatocellular carcinoma and mixed hepatocellular-cholangiocellular *** is the sixth most common cancer and the second ... 详细信息

关键词： cancer carcinoma. liver