检索结果-南通市图书馆

Discrepancy of Certain Kronecker Sequences Concerning Transcendental Numbers

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第10期23卷 1897-1902页

作者： yao Chen zhu Institute of Applied Mathematics Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 P. R. China

Let ω1,..., ωs be a set of real transcendental numbers satisfying a certain Diophantine inequality. The upper bound for the discrepancy of the Kronecker sequence （{nω1},..., {nωs}）（1 ≤ n ≤ N） is given. In pa... 详细信息

关键词： discrepancy Kronecker-sequence transcendental number

Algebraic Independence of Certain Generalized Mahler Type Numbers

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第1期23卷 17-22页

作者： yao Chen zhu Institute of Applied Mathematics Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 P. R China

In this paper the generalized Mahler type number Mh（g;A,T） is defined, and in the case of multiplicatively dependent parameters gi, hi（1 ≤ i ≤ s） the algebraic independence of the numbers Mhi （gi; A, T）（1 ≤ i ≤ s） is proved, where A and T are certain infinite sequences of non-negative integers and of positive integers, respectively. Furthermore, the algebraic independence result on values of a certain function connected with the generalized Mahler type number and its derivatives at algebraic numbers is also given.

关键词： Mahler type numbers Generalized Mahler type numbers Algebraic independence Multiplicative dependence

Line profile studies of hydrodynamical models of cometary compact H II regions

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2015年第6期15卷 828-848页

作者： Feng-yao zhu Qing-Feng zhu Department of Astronomy University of Science and Technology of China Key Laboratory for Research in Galaxies and Cosmology University of Science and Technology of China Chinese Academy of Sciences

We simulate the evolution of cometary H II regions based on several champagne flow models and bow shock models, and calculate the profiles of the [Ne II] fine-structure line at 12.81 μm, the H30α recombination line and the [Ne III] finestructure line at 15.55 μm for these models at different inclinations of 0°, 30° and 60°. We find that the profiles in the bow shock models are generally different from those in the champagne flow models, but the profiles in the bow shock models with lower stellar velocity （≤ 5 km s^-1） are similar to those in the champagne flow models. In champagne flow models, both the velocity of peak flux and the flux weighted central velocities of all three lines point outward from molecular clouds. In bow shock models, the directions of these velocities depend on the speed of stars. The central velocities of these lines are consistent with the stellar motion in the high stellar speed cases, but they are opposite directions from the stellar motion in the low speed cases. We notice that the line profiles from the slit along the symmetrical axis of the projected 2D image of these models are useful for distinguishing bow shock models from champagne flow models. It is also confirmed by the calculation that the flux weighted central velocity and the line luminosity of the [Ne III] line can be estimated from the [Ne II] line and the H30α line.

关键词： H II regions -- ISM kinematics and dynamics clusters -- line profiles

Effects of magnetic field on the evolution of the wave function of a charged particle with an angular momentum

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2022年第5期74卷 10-14页

作者： Pei-Song He yao-Hui zhu Physics department Beijing Technology and Business UniversityBeijing 100048.China

We have calculated the effect of a magnetic field on the evolution of angular momentum eigenfunctions of a charged *** additional harmonic potential is supplemented to trap the wave *** find the probability density of the wave function is oscillating in the radial direction with a time period determined by the strength of the effective harmonic *** the magnetic field is along the z direction,if the initial wave function is an eigenfunction of■,the probability density of the particle remains *** for the case of an eigenfunction of■,it is anisotropic in the x-y plane and rotates with a time period inverse proportional to the strength of the external magnetic *** also extend the results in a phenomenological way to the case with an external magnetic field that varies harmonically in time.

关键词： angular momentum uncertainty magnetic field

Experimental Study on Coal Partial Gasification Coproducing Char,Tar,and Gas

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2023年第6期32卷 2297-2309页

作者： SONG Xue WANG Qinhui zhu yao XIE Guilin zhu Deao CEN Jianmeng LUO Zhongyang State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou310027China

The coal partial gasification process produces a large number of *** have similar combustion characteristics to anthracite and can be utilized as a material manufacturing clean briquette to replace residential coal to achieve clean ***,the coal partial gasification produced more tar at relatively low temperature,which can be applied as naphtha or diesel after purification and ***,experiments of coal partial gasification coproducing char,tar,and gas are carried out on a bench-scale fluidized bed reactor during the temperature range of 625–762℃.The effect of equivalence ratio on the characteristics of coal partial gasification products is *** results show that the equivalence ratio increasing from 0.06 to 0.13 leads to a higher partial gasification temperature and lower char yield,and tar yield reaches a maximum value and the lower calorific value of gas reaches as high as 6.14 MJ/m^(3).When the gasification temperature is lower than 643℃,the increase in temperature promotes the generation of oxygen-containing functional groups and aromatic compounds in coal particles,and the microstructures of char become more *** combustion stability of char is getting worse,whereas the pore structures in char become abundant at high *** the analysis of the tar chromatography column,it is observed that asphaltene and non-hydrocarbon account for 77%–88%of the total amount of tar.

关键词： coal partial gasification cascading utilization product characteristics

Squeezing microwaves by magnetostriction

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第5期10卷 208-214页

作者： Jie Li Yi-Pu Wang Jian-Qiang You Shi-yao zhu Interdisciplinary Center of Quantum Information Zhejiang Province Key Laboratory of Quantum Technology and Deviceand State Key Laboratory of Modern Optical InstrumentationSchool of PhysicsZhejiang University

Squeezed light finds many important applications in quantum information science and quantum metrology,and has been produced in a variety of physical systems involving optical non-linear ***,we show how a non-linear magnetostrictive interaction in a ferrimagnet in cavity magnomechanics can be used to reduce quantum noise of the electromagnetic *** show optimal parameter regimes where a substantial and stationary squeezing of the microwave output field can be *** of the scheme is within reach of current technology in cavity electromagnonics and *** work provides a new and practicable approach for producing s queezed vacuum states of electromagnetic fields,and may find promising applications in quantum information processing and quantum metrology.

关键词： squeezing of quantum noise cavity magnonics magnomechanics

Prostate cancer in East Asia： evolving trend over the ast decade

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2015年第1期17卷 48-57,I0007页

作者： yao zhu Department of Urology Fudan University Shanghai Cancer Center Shanghai 200032 China Department of Oncology Fudan University Shanghai Medical College Shanghai 200032 China.

Prostate cancer is now becoming an emerging health priority in East Asia. Most of our current knowledge on Prostate cancer has been generated from studies conducted in Western population; however, there is considerable heterogeneity of Prostate cancer between East and West. In this article, we reviewed epidemiologic trends, risk factors, disease characteristics and management of Prostate cancer in East Asian population over the last decade. Growing evidence from East Asia suggests an important role of genetic and environmental risk factors interactions in the carcinogenesis of Pr0s^te cancer. Exposure to westernized diet and life style and improvement in health care in combination contribute substantially to the increasing epidemic in this region. Diagnostic and treatment guidelines in East Asia are largely based on Western knowledge. Although there is a remarkable improvementin the outcome over the last decade, ample evidence suggests an inneglectable difference in diagnostic accuracy, treatment efficacy and adverse events between different populations. The knowledge from western countries should be calibrated in the Asian setting to provide a better race-based treatment approach. In this review, we intend to reveal the evolving trend of Prostate cancer in the last decade, in order to gain evidence to improve Prostate cancer prevention and control in East Asia.

关键词： Asians diagnosis epidemiology genetics prostate cancer treatment outcome

A brief review on the diagnostic and therapeutic principles of primary urethral cancer

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

Asian Journal of Urology 2022年第4期9卷 423-429页

作者： Hengchuan Su yao zhu Dingwei Ye Department of Urology Fudan University Shanghai Cancer CenterShanghaiChina Department of Oncology Shanghai Medical CollegeFudanUniversityShanghaiChina

Objective:Primary urethral carcinoma(PUC)is a rare malignant carcinoma but with limited therapeutic *** review aims to provide an overview of the current strategies on this patient ***:Recent literature ranging from January 1987 and December 2021 was assessed through PubMed search to assess the diagnostic and therapeutic principles of ***:A complete of examination including cystoscopy,imaging,and biopsy should be conducted for these *** diagnosed,the clinical decision of PUC should be made according to the tumor location,pathological pattern,and extent of the *** patients with superficial and distal urethral lesions,organ sparing approaches or radical reconstructive procedures can be *** for more advanced disease or nodal involvement,an optimal multimodal treatment strategy consisted of surgery and radiochemotherapy should be *** patients with urothelial carcinoma of the prostate,the management including transurethral resection of the prostate followed by bacille Calmette-Guerin or radical cysto-prostatectomy should depend on the infiltration depth of ***:A complete of examination is important for the diagnosis of *** management of PUC should be determined by the location,pathological pattern,and extent of the *** multi-institutional collaborations should be held to investigate better treatment modal-ities for PUC.

关键词： Diagnosis Management Primary Urethral Cancer

National Comprehensive Cancer Network （NCCN） riSK classification in predicting biochemical recurrence after radical prostatectomy： a retrospective cohort study in Chinese prostate cancer patients

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2018年第6期20卷 551-554页

作者： Hua Xu yao zhu Bo Dai Ding-Wei Ye Department of Urology Fudan University Shanghai Cancer Center Shanghai 200032 China Department of Oncology Shanghai Medical College Fudan University Shanghai 200032 China

This study aimed to assess the role of the National Comprehensive Cancer Network （NCCN） risk classification in predicting biochemical recurrence （BCR） after radical prostatectomy （RP） in Chinese prostate cancer patients. We included a consecutive cohort of 385 patients with prostate cancer who underwent RP at Fudan University Shanghai Cancer Center （Shanghai, China） from March 2011 to December 2014. Gleason grade groups were applied at analysis according to the 2014 International Society of Urological Pathology Consensus. Risk groups were stratified according to the NCCN Clinical Practice Guidelines in Oncology： Prostate Cancer version 1, 2017. All 385 patients were divided into BCR and non-BCR groups. The clinicopathological characteristics were compared using an independent sample t-test, Chi-squared test, and Fisher＇s exact test. BCR-free survival was compared using the log-rank test and multivariable Cox proportional hazard analysis. During median follow-up of 48 months （range： 1-78 months）, 31 （8.05%） patients experienced BCR. The BCR group had higher prostate-specific antigen level at diagnosis （46.54 ± 39.58 ng m1-1 vs 21.02 ± 21.06 ng ml-1, P= 0.001）, more advanced pT stage （P= 0.002）, and higher pN1 rate （P〈 0.001）. NCCN risk classification was a significant predictor of BCR {P = 0.0006） and BCR-free survival （P = 0.003） after RP. As NCCN risk level increased, there was a significant decreasing trend in BCR-free survival rate （Ptrend = 0.0002）. This study confirmed and validated that NCCN risk classification was a significant predictor of BCR and BCR-free survival after RP.

关键词： biochemical recurrence prostate cancer radical prostatectomy National Comprehensive Cancer Network risk classification