检索结果-南通市图书馆

X(2900)in a chiral quark model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第9期45卷 55-64页

作者： yue tan Jialun Ping Department of Physics and Jiangsu Key Laboratory for Numerical Simulation of Large SaSystems Nanjing Normal UniversityNanjing 210023China Department of Physics Yancheng UniversityNanjing 210023China

Recently,the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named X_(0)(2900)and X_(1)(2900)with unknown *** by the report,we consider all the possible fourquark candidates for X(2900),which include the molecular structure,diquark structure,and their coupling in a chiral quark model via the Gaussian expansion *** identify the genuine resonances,the real-scaling method(stabilization method)was *** results show that five possible resonances,R_(0)(2914)withΓ=42 MeV,R_(1)(2906)withΓ=29 MeV,R_(1)(2912)withΓ=10 McV,R_(J)(2920)withΓ=9 MeV,and R_(J)(2842)withΓ=24 MeV,originate in the csqq *** with experimental data,R_(0)(2914)withΓ=42 MeV may be an optimal X_(0)(2900)***,none of the resonances have a similar width for X_(1)(2900).Hence,further study is required.

关键词： X(2900) quark model gaussian expansi on method real-scaling method

Light quarkonium and charmonium mass shifts in an unquenched quark model

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第9期48卷 96-106页

作者： Xiaoyun Chen yue tan College of Science Jinling Institute of TechnologyNanjing 211169China Department of Physics Yancheng Institute of TechnologyYancheng 224000China

The unquenched quark model for the light quarkonium and charmonium states is explored in this *** quark-pair creation operator in the^(3)P_(0) model,which combines the two-quark and four-quark components,is modified by considering the effects of the created quark pair's ***,the separation between the created quark pair and valence quark pair is *** the wave functions,including those for the mesons and the relative motion between two mesons,are obtained by solving the corresponding Schrodinger equation using the Gaussian expansion *** aim of this study is to find a new set of parameters that can accurately describe the mass spectrum of low-lying light quarkonium and charmonium ***,certain exotic states,such as X(3872),can be described well in the unquenched quark model.

关键词： the unquenched quark model Gaussian expansion method light quarkonium and charmonium states

Insulin resistance and occurrence and prognosis of ischemic stroke A non-randomized concurrent control and intra-group comparison

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2008年第3期3卷 324-328页

作者： Xiaohong Zhao Shaojun Jiang yue tan Department of Geriatric Disease Second Affiliated Hospital Kunming Medical College Kunming 650101 Yunnan Province China Department of Neurology People＇s Hospital of Langzhong Langzhong 637400 Sichuan Province China

BACKGROUND： Clinical evidence has demonstrated that insulin resistance might be an independent risk factor for ischemic stroke, which has not been recognized. At present, insulin resistance has been proven to be an independent risk factor for coronary arteriosclerotic heart disease. However, the relationship between the onset and prognosis of ischemic stroke remains unclear. OBJECTIVE： This study was designed to analyze the relationship between insulin resistance and ischemic stroke and the correlation between insulin resistance and stroke risk factor, and to investigate the relationship between insulin resistance and ischemic stroke prognosis as well as whether insulin resistance is an independent prognostic factor. DESIGN： A non-randomized concurrent control experiment. SETTING： Department of Geriatric Disease, Second Affiliated Hospital of Kunming Medical College. PARTICIPANTS： A total of 106 inpatients with ischemic stroke of the cervical internal carotid artery, who had suffered from the disease within the previous 72 hours, were admitted to the Department of Neurology, First Affiliated Hospital of Kunming Medical College from March to December in 2005 and, recruited for the present study. All 106 inpatients corresponded to the diagnostic criteria of ischemic stroke, formulated at the Fourth National Cerebrovascular Disease Conference in 1995, and were confirmed as having had an ischemic stroke by CT/MRI examinations. The patient group consisted of 54 males and 52 females. An additional 50 healthy individuals, who received health examinations simultaneously, were included as controls. Among the control subjects, there were 26 males and 24 females. Informed consent for laboratory measurements was obtained from all subjects; this study was approved by the Hospital Ethics Committee. METHODS： Following admission, all subjects were inquired of age, gender, previous history, blood pressure, body temperature, admission time, and smoking habits. Meanwhile, they were sc

关键词： insulin resistance ischemic stroke stroke risk factor prognosis

A consensus model for group decision making under interval type-2 fuzzy environment

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 237-249页

作者： Xiao-xiong ZHANG Bing-feng GE yue-jin tan College of Information System and Management National University of Defense Technology Changsha 410073 China

We propose a new consensus model for group decision making(GDM) problems, using an interval type-2 fuzzy environment. In our model, experts are asked to express their preferences using linguistic terms characterized by interval type-2 fuzzy sets(IT2 FSs), because these can provide decision makers with greater freedom to express the vagueness in real-life situations. Consensus and proximity measures based on the arithmetic operations of IT2 FSs are used simultaneously to guide the decision-making process. The majority of previous studies have taken into account only the importance of the experts in the aggregation process, which may give unreasonable results. Thus, we propose a new feedback mechanism that generates different advice strategies for experts according to their levels of importance. In general, experts with a lower level of importance require a larger number of suggestions to change their initial preferences. Finally, we investigate a numerical example and execute comparable models and ours, to demonstrate the performance of our proposed model. The results indicate that the proposed model provides greater insight into the GDM process.

关键词： Group decision making (GDM) Interval type-2 fuzzy sets (IT2 FSs) Feedback mechanism

In sight on multiple morphological abno rmalities of sperm flagella in male infertility:what is new?

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2020年第3期22卷 236-245页

作者： Wei-Li Wang Chao-Feng Tu yue-Qiu tan Institute of Reproductive and Stem Cell Engineering School of Basic Medical ScienceCentral South UniversityChangsha 410078China Reproductive and Genetic Hospital of CITIC-Xiangya Changsha 410078China National Engineering and Research Center of Human Stem Cell Changsha 410078China

The syndrome of multiple morphological abnormalities of the sperm flagella(MMAF)is a specific kind of asthenoteratozoospermia with a mosaic of flagellar morphological abnormalities(absent,short,bent,coiled,and irregular flagella).MMAF was proposed in 2014 and has attracted increasing attention;however,it has not been clearly *** this review,we elucidate the definition of MMAF from a systematical view,the difference between MMAF and other conditions with asthenoteratozoospermia or asthenozoospermia(such as primary mitochondrial sheath defects and primary ciliary dyskinesia),the knowledge regarding its etiological mechanism and related genetic findings,and the clinical significance of MMAF for intracytoplasmic sperm injection and genetic coun sell *** review provides the basic kno wledge for MMAF and puts forward some suggestions for further investigations.

关键词： asthe no teratozoospermia disease-causing ge nes in tracytoplasmic sperm in jecti on male in fertility multiple morphological abnormalities of the sperm flagella

The incentive and coordination strategy of sustainable construction supply chain based on robust optimisation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Control and Decision 2020年第2期7卷 126-159页

作者： Ya-qin Lin Chun-xiang Guo yue tan Antai College of Economics&Management Shanghai Jiao Tong UniversityShanghaiPeople’s Republic of China Business School of Sichuan University Chengdu 610064People’s Republic of China

This paper considers the incentive and coordination problem of the construction supply chain consisting of the owner,general contractor,subcontractors and suppliers based on the sustainable development goals under uncertain ***,according to the general contract management pattern and the relationships among those participants,we establish an uncertain bi-level nonlinear model in which the owner set the proper intensities to minimise the total cost at first while the general contractor decides its alternative and the limits to subcontractors ***,we convert the primal model into a deterministic bi-level nonlinear programming model based on the concept of relative ***,a solution procedure combing interactive fuzzy technique and genetic algorithm is ***,the validity of the model is verified by a numerical *** paper provides a method to optimise the construction project management from the perspective of supply chain under the requirement of sustainable development.

关键词： Sustainable development construction supply chain incentive coordination bi-level programming robust optimisation

Valley modulation and topological phase transition in staggered kagome ferromagnets

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第12期33卷 416-421页

作者： Yuheng Xing Wenjuan Qiu Xinxing Wu yue tan Department of Physics School of Mathematics and PhysicsYancheng Institute of TechnologyYancheng 224051China

Owing to their charge-free property,magnons are highly promising for achieving dissipationless transport without Joule heating,and are thus potentially applicable to energy-efficient ***,we investigate valley magnons and associated valley modulations in a kagome ferromagnetic lattice with staggered exchange interaction and Dzyaloshinskii-Moriya *** staggered exchange interaction breaks the spatial inversion symmetry,leading to a valley magnon Hall *** nonzero Dzyaloshinskii-Moriya interaction in a staggered kagome lattice,the magnon Hall effect can be observed from only one ***,reversing the Dzyaloshinskii-Moriya interaction(D→-D)and exchanging J_(1)and J_(2)(J_(1)■J_(2))can also regulate the position of the unequal *** increasing Dzyaloshinskii-Moriya interaction,a series of topological phase transitions appear when two bands come to touch and split at the *** valley Hall effect and topological phase transitions observed in kagome magnon lattices can be realized in thin films of insulating ferromagnets such as Lu_(2)V_(2)O_(7),and will extend the basis for magnonics applications in the future.

关键词： valley modulation Dzyaloshinskii-Moriya interaction staggered kagome ferromagnets topological phase transitions magnon Hall effect

Heterolytic and homolytic C-D bond dissociation energies of NADH models in acetonitrile and primary isotopic effects on hydride versus hydrogen atom transfer reactions

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2012年第10期55卷 2054-2056页

作者： CAO ChaoTun tan yue ZHU Xiao-Qing State Key Laboratory of Elemento-Organic Chemistry Department of ChemistryNankai UniversityTianjin 300071China

Heterolytic and homolytic C D bond dissociation energies of three NADH models: BNAH-4,4-d 2 , HEH-4,4-d 2 and AcrD 2 in acetonitrile were first estimated by using an efficient method. The results showed that the heterolytic C D bond dissociation energies are 65.2, 70.2, and 81.9 kcal/mol and the homolytic C D bond dissociation energies are 72.66, 70.69, and 74.95 kcal/mol for BNAH-4,4-d 2 , HEH-4,4-d 2 , and AcrD 2 , respectively. According to the bond dissociation energy differences of isotope isomers, an interesting conclusion can be made that the primary kinetic isotope effects are dependent not only on the zero-point energy difference of the isotope isomers, but also on the types of C D bond dissociations, and the C D bond homolytic dissociations should have much larger primary kinetic isotope effects (26.9 28.8) than the corresponding C D bond heterolytic dissociations (3.9-5.4).

关键词： bond dissociation energies primary isotopic effects nicotinamide-adenine dinucleotide coenzyme models

Vitreous amyloidosis caused by a Lys55Asn variant in transthyretin: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第32期10卷 12000-12006页

作者： yue tan Yuan Tao Yan-Juan Sheng Chen-Ming Zhang Department of Ophthalmology The Jinan Second People’s HospitalJinan 250000Shandong ProvinceChina

BACKGROUND Amyloidosis is caused by misfolding of proteins and is characterized by formation of extracellular aggregates of insoluble *** primary effects in the eye include sharp deterioration of visual acuity as a result of vitreous *** to the local and systemic distribution characteristics of amyloid deposits and their fibrin components,amyloidosis can be classified as primary,secondary or ***,we report a typical case of vitreous amyloidosis in hereditary transthyretin amyloidosis(hATTR)to improve ophthalmologists’understanding of the disease and reduce misdiagnosis and *** SUMMARY The patient was a 49-year-old man who complained of progressive visual decline in both eyes over a 2-mo *** systemic diseases such as diabetes or hypertension were reported,and no obvious family history of disease was *** patient’s visual acuity was HM/10 cm in the right eye and 0.06 in the left *** had a transparent cornea in both eyes,with a normal anterior depth,clear aqueous humor,no obvious iris abnormalities,round pupils of approximately 3 mm in diameter,normal direct and indirect light reflexes,and normal intraocular *** various examinations,the patient was diagnosed with binocular vitreous amyloidosis secondary to hATTR associated with a Lys55Asn variant in *** binocular visual acuity recovered to 1.0 after binocular *** Vitreous amyloidosis is rare in the clinic and gene testing can assist the diagnosis accurately and effectively.

关键词： Vitreous amyloidosis Transthyretin Lys55Asn variant Vitrectomy Case report