检索结果-南通市图书馆

World Journal of Clinical Cases 2025年第6期13卷 41-47页

作者： Kuan-Hua Chen Ming-Yuan Kang Yi-Ting Chang sheng-yang Huang Yung-Szu Wu Center for Cardiovascular Disease Taichung Veterans General HospitalTaichung 407219TaiwanChina Department of Anesthesiology Taichung Veterans General HospitalTaichung 407219TaiwanChina Division of Pediatric Surgery Department of SurgeryTaichung Veterans General HospitalTaichung 407219TaiwanChina School of Medicine National Yang Ming Chiao Tung UniversityTaipei 112304TaiwanChina Department of Post-Baccalaureate Medicine National Chung Hsing UniversityTaichung 402202TaiwanChina

BACKGROUND Abdominal aortic aneurysm(AAA)repair often involves significant postoperative pain,traditionally managed with systemic opioids,which can cause undesirable side *** case report explores the novel use of a surgically-initiated rectus sheath block with a catheter-over-needle assembly for pain management in AAA *** SUMMARY A 67-year-old female with hypertension and previous aortic dissection underwent elective open repair of an infrarenal AAA,which had grown from 3.4 cm to 4.3 cm over 14 months.A rectus sheath block was initiated surgically for postoperative pain *** patient reported low pain scores and did not require systemic intravenous opioids,enabling early ambulation and discharge on postoperative day seven without *** preventing complications of systemic opi-oids,the method indicating a promising direction for postoperative pain management in major vascular *** Surgically-initiated rectus sheath block as a valuable tool for managing postoperative pain in AAA repair.

关键词： Abdominal aortic aneurysm Postoperative pain management Rectus sheath block Surgical anesthesia Opioid-sparing techniques Case report

3-Blocks with Abelian Defect Groups Isomorphic to Z3m × Z3n

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2013年第12期29卷 2245-2250页

作者： sheng yang Department of Mathematics Wenzhou University

Let G be a finite group and let p be a fixed prime number. Let B be a p-block of G with defect group D. In this paper, we give results on 3-blocks with abelian defect groups isomorphic to Z3m ×Z3n. We are particularly interested in the number of irreducible ordinary characters and the number of irreducible Brauer characters in the block. We calculate two important block invariants k（B） and l（B） in this case.

关键词： Blocks defect groups inertial quotient inertial index

On the Generalized 2-D Stochastic Ginzburg-Landau Equation

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2010年第8期26卷 1601-1612页

作者： De sheng yang School of Mathematical Sciences and Computing Technology Central South University Changsha 410083 P. R. China

This paper proves the existence and uniqueness of solutions in a Banach space for the generalized stochastic Ginzburg-Landau equation with a multiplicative noise in two spatial dimensions. The noise is white in time and correlated in spatial variables. The condition on the parameters is the same as in the deterministic case. The Banach contraction principle and stochastic estimates in Banach spaces are used as the main tool.

关键词： Generalized stochastic Ginzburg-Landau equation multiplicative noise stochastic partial differential equation

On the control of fusion in the local category for the p-block with a minimal nonabelian defect group

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2011年第2期54卷 325-340页

作者： yang sheng GAO sheng School of Mathematical Sciences Peking University Beijing 100871 China

If B is a p-block of a finite group G with a minimal nonabelian defect group D (p is an odd prime number) and (D, b D ) is a Sylow B-subpair of G, then N G (D, b D ) controls B-fusion of G in most cases. This result is of great importance, because we can use it to obtain a complete set of representatives of G-conjugate classes of B-subsections and to calculate the number of ordinary irreducible characters in B. This result is key to the calculation of the structure invariants of the block with a minimal nonablian defect group. On the other hand, we improve Brauer's famous formula k(B) =Σ (ω,b ω ) l(b ω ),where (ω, b ω ) ∈ [(G : sp(B))]. Let p be any prime number, B be a p-block of a finite group G and (D, b D ) be a Sylow B-subpair of G. H is a subgroup of N G (D, b D ) satisfying N G (R, b R ) = N H (R, b R )C G (R), (R, b R ) ∈ A 0 (D, b D ), N G ( w , b w' ) = N H ( w , b w' )C G (w' ), (w' , b w' ) ∈ (D, b D ). If w 1 , . . . , w l is a complete set of representatives of H-conjugate classes of D, then (w 1 , b w 1 ), . . . , (w l , b w l ) is a complete set of representatives of G-conjugate classes of B-subsections in G. In particular, we have k(B) =Σ l j=1 l(b w j ).

关键词： defect group subpair control of fusion Brauer's net

Theoretical Study on the Reaction Mechanism of F_2+2HBr = 2HF+Br_2

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第11期24卷 1328-1333页

作者： SUN De-sheng WANG Zun-Yao yang Chun-sheng School of Chemistry and Chemical Engineering Nanjing University of Technology Jiangsu Nanjing 210009 China Department of Chemical Engineering Yancheng Institute of Technology Jiangsu Yancheng 224003 China

The gas phase reaction mechanism of F2 ＋ 2HBr = 2HF ＋ Br2 has been investigated by （U）MP2 at 6-311G＊＊ level, and a series of four-center and three-center transition states have been obtained. The reaction mechanism was achieved by comparing the activation energy of seven reaction paths, i.e. the dissociation energy of F2 is less than the activation energy of the bimolecular elementary reaction F2 ＋ HBr → HF ＋ BrF. Thus it is theoretically proved that the title reaction occurs more easily in the free radical reaction with three medium steps.

关键词： (U)MP2,transition state reaction mechanism free radical reaction.

On the Number of Irreducible Characters in a 3-block with a Minimal Nonabelian Defect Group

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2017年第9期33卷 1267-1274页

作者： sheng yang sheng GAO Chong Bin XU Department of Mathematics Wenzhou University Department of Mathematics Hefei University of Technology

Let B be a 3-block of a finite group G with a defect group D. In this paper, we are mainly concerned with the number of characters in a particular block, so we shall use Isaacs＇ approach to block structure. We consider the block B of a group G as a union of two sets, namely a set of irreducible ordinary characters of G having cardinality k（B） and a set of irreducible Brauer characters of G having cardinality l（B）. We calculate k（B） and l（B） provided that D is normal in G and D = （x, y, z｜x3n=y3m = z3 = [x, z] = [y, z] = 1, [x, y] = z）（n 〉 m 〉 2）.

关键词： Characters blocks defect groups inertial groups

A general solution for one dimensional chemo-mechanical coupled hydrogel rod

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2018年第2期34卷 392-399页

作者： Xing-Quan Wang Qing-sheng yang Department of Engineering Mechanics Beijing University of Technology

Smart hydrogels are environmentally sensitive hydrogels, which can produce a sensitive response to external stimuli, and often exhibit the characteristics of multi filed coupling. In this paper, a hydrogel rod under chemomechanical coupling was analytically studied based on a poroelastical model. The already known constitutive and governing equations were simplified into the one dimensional case, then two different boundary conditions were considered. The expressions of concentration, displacement,chemical potential and stress related to time were obtained in a series form. Examples illustrate the interaction mechanism of chemical and mechanical effect. It was found that there was a balance state in the diffusion of concentration and the diffusion process could lead to the expansion or the stress change of the hydrogel rod.

关键词： Chemo-mechanical coupling Analytical solution One dimensional hydrogel rod

Contractivity and Exponential Stability of Solutions to Nonlinear Neutral Functional Differential Equations in Banach Spaces

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2012年第2期28卷 289-304页

作者： Wan-sheng WANG Shou-fuLI Run-sheng yang School of Mathematics and Computational Science Changsha University of Science ＆ Technology Yuntang Campus Changsha 410114 China School of Mathematics and Computational Sciences Xiangtan University Xiangtan 411105 China

A series of eontractivity and exponential stability results for the solutions to nonlinear neutral functional differential equations （NFDEs） in Banach spaces are obtained, which provide unified theoretical foundation for the contractivity analysis of solutions to nonlinear problems in functional differential equations （FDEs）, neutral delay differential equations （NDDEs） and NFDEs of other types which appear in practice.

关键词： nonlinear neutral functional differential equations contractivity exponential stability~ Banachspaces

Finite element analysis of shape-memory polymer mast

在线全文

学校读者我要写书评

暂无评论

International Journal of Smart and Nano Materials 2019年第4期10卷 285-299页

作者： Shuai Liu Qing-sheng yang Department of Engineering Mechanics Beijing University of TechnologyBeijingChina

Space masts are widely used in the aerospace engineering as one type of deployable space *** this paper,based on the stimuli-responsive effects of shape-memory polymers(SMPs),an intelligent mast with shape-memory function is *** thermos-mechanical constitutive model of SMPs is associated with the finite element(FE)software,and then the deployable deformation and shape-memory effect of the intelligent mast are investigated by the FE *** is demonstrated that the mast can automatically deploy due to the shape recovery characteristics of ***,the effects of structure parametric of the mast and temperature are also *** results can contribute to the design and application of novel SMP masts.

关键词： Space masts shape-memory polymers FE analysis folding and deployment

Advances in plastid transformation for metabolic engineering in higher plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

aBIOTECH 2022年第3期3卷 224-232页

作者： sheng yang Yi Deng shengchun Li State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life SciencesHubei UniversityWuhan430062China

The plastid(chloroplast)genome of higher plants is an appealing target for metabolic engineering via genetic *** the bacterial-type plastid genome is small compared with the nuclear genome,it can accommodate large quantities of foreign genes that precisely integrate through homologous *** complex metabolic pathways in plants often requires simultaneous and concerted expression of multiple transgenes,the possibility of stacking several transgenes in synthetic operons makes the transplastomic approach *** potential for extraordinarily high-level transgene expression,absence of epigenetic gene silencing and transgene containment due to the exclusion of plastids from pollen transmission in most angiosperm species further add to the attractiveness of plastid transformation *** minireview describes recent advances in expanding the toolboxes for plastid genome engineering,and highlights selected high-value metabolites produced using transplastomic plants,including artemisinin,astaxanthin and paclitaxel.

关键词： Plastid transformation Metabolic engineering Multiple transgenes High-level expression