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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

The future of carbon neutrality from a scientific research perspective:an interview with Jing-Hai Li

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National Science Review 2023年第9期10卷 110-112页

作者： Li-hua chen Wuhan University of Technology

Since China announced that it will strive to achieve carbon peak by 2030 and carbon neutrality by 2060, it has become the focus of the whole *** implementation of carbon peaking and carbon neutrality goals requires a range of revolutionary technologies and involves an array of key scientific questions.A great deal of research has focused on the development of new concepts and innovative technologies on carbon science and sustainable development.

关键词： Carbon

Goal-Oriented Control Systems(GOCS):From HOW to WHAT

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 816-819页

作者： Wen-hua chen the Department of Aeronautical and Automotive Engineering Loughborough UniversityLeicestershireLE113TUU.K.

Brief:New control theory is required to underpin safe design and deployment of future highly automated systems to deal with uncertain environments and complicated tasks,enabled by AI and other advanced ***-Oriented Control Systems offer potential to transform the control system design from currently instructing a control system how to perform a task to specifying what is to be achieved.

关键词： automated instru system

Downstream Development of Baroclinic Waves in the Midlatitude Jet Induced by Extratropical Transition: A Case Study

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Advances in Atmospheric Sciences 2015年第4期32卷 528-540页

作者： chen hua Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science and Technology

This study uses eddy kinetic energy analysis and a targeting method to investigate how an extratropical transition（ET）event induced downstream development（the modification of the midlatitude flow downstream of the ET system） in the midlatitude jet environment. The downstream development showed distinct characteristics of ＂coupling development＂ and being ＂boundary-trapped＂. Eddies（potential disturbances） first developed at the upper levels, and these triggered lower-level eddy development, with all eddies decaying away from the tropopause and the surface. Thereafter, a lower-level eddy caught up with the upper-level eddy ahead of it, and they coupled to form a cyclone extending through the whole troposphere. Vertical ageostrophic geopotential flux may be a crucial dynamic factor throughout the eddy＇s lower-level growth, boundary-trapping,and coupling *** with barotropic conversion, the ageostrophic geopotential fluxes that were transported from Hurricane Fabian（2003） to the midlatitudes by the outflow led to downstream ridge development in the upper-level jet. The strong downstream advection of eddy kinetic energy in the exit region of the jet streak triggered downstream trough development. The well-known ridge–trough couplet thus formed. The vertical ageostrophic fluxes that were transported downward from the developed upper-level systems converged near the surface and resulted in lower-level eddy growth. Baroclinic conversion was negligible near the boundaries, while it was the main source of eddy kinetic energy at mid-levels. In the upper-level jet, potential energy was converted to the mean kinetic energy of the jet, which in turn was converted to eddy kinetic energy through barotropic conversion.

关键词： downstream development ageostropic geopotential flux boundary-trapping coupling development

A Computational Approach for Modeling the Allele Frequency Spectrum of Populations with Arbitrarily Varying Size

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Genomics, Proteomics & Bioinformatics 2019年第6期17卷 635-644页

作者： hua chen CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming 650223China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

The allele frequency spectrum(AFS), or site frequency spectrum, is commonly used to summarize the genomic polymorphism pattern of a sample, which is informative for inferring population history and detecting natural selection. In 2013, chen and chen developed a method for analytically deriving the AFS for populations with temporally varying size through the coalescence time-scaling function. However, their approach is only applicable to population history scenarios in which the analytical form of the time-scaling function is tractable. In this paper, we propose a computational approach to extend the method to populations with arbitrary complex varying size by numerically approximating the time-scaling function. We demonstrate the performance of the approach by constructing the AFS for two population history scenarios: the logistic growth model and the Gompertz growth model, for which the AFS are unavailable with existing approaches. Software for implementing the algorithm can be downloaded at http://***/software/.

关键词： Allele frequency spectrum Complex demography Population history Population genetic inference Coalescent

Covalent hadronic molecules induced by shared light quarks

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Communications in Theoretical Physics 2022年第12期74卷 62-86页

作者： hua-Xing chen School of Physics Southeast UniversityNanjing 210094China

After examining Feynman diagrams corresponding to the ■, ■, ■, and ■ hadronic molecular states, we propose a possible binding mechanism induced by shared light quarks. This mechanism is similar to the covalent bond in chemical molecules induced by shared electrons. We use the method of QCD sum rules to calculate its corresponding light-quark-exchange diagrams, and the obtained results indicate a model-independent hypothesis: the light-quark-exchange interaction is attractive when the shared light quarks are totally antisymmetric so they obey the Pauli principle. We build a toy model with four parameters to formulize this picture and estimate binding energies of some possibly-existing covalent hadronic molecules. A unique feature of this picture is that the binding energies of the(I)JP=(0)1+■ hadronic molecules are much larger than those of the (I)JP=(0)1+■ ones, while the(I)JP=(1/2)1/2+■ hadronic molecules have similar binding energies.

关键词： hadronic molecule covalent bond QCD sum rules

Decay properties of the X(3872)through the Fierz rearrangement

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Communications in Theoretical Physics 2022年第2期74卷 60-77页

作者： hua-Xing chen School of Physics Southeast UniversityNanjing 210094China

We systematically construct all the tetraquark currents of J^(PC)=1^(++) with the quark configurations[cq][cq],[cq][qc],and[cc][qq](q=u/d).Their relations are derived using the Fierz rearrangement of the Dirac and color indices,through which we study decay properties of the X(3872)under both the compact tetraquark and hadronic molecule *** conduct a search for the X(3872)→χ_(c0)π,η_(c)ππ,and χ_(c1)ππ decay processes in particle experiments.

关键词： exotic hadron tetraquark state hadronic molecule Fierz rearrangement QCD sum rules

Dynamic Behavior Analysis of Finger Seal Based on Equivalent Dynamic Model

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Chinese Journal of Mechanical Engineering 2010年第5期23卷 590-599页

作者： SU hua chen Guoding School of Mechatronics Northwestern Polytechnical University Xi ＇an 710072 China

Finger seal is a new technology developed for gas path sealing in gas turbine *** has been paid attention to its good sealing performance and lower manufacture *** vibration behavior of finger seal is not be considered in performance analysis for the contact finger seal with compliant geometric configuration,then this will influence the reliability of the performance analysis and the parametric design of a finger *** to the dynamic character of finger seal,the harmonic vibration and free vibration models of a repetitive section of a two-layer finger seal that contains one high and one low finger seal are established *** dynamic behavior of finger seal in different working conditions is obtained based on the dynamic response analysis of finger＇s *** dynamic low hysteresis and low wear terms based on the equivalent dynamic model of finger seal are put forward,which can be used to predict the dynamic behavior of finger *** an example,the dynamic behaviors of an 8-layer finger seal and a 10-layer finger seal were predicted,and the validity of the prediction was demonstrated by the leakage test results of these two finger *** work presented here not only could make the dynamic analysis of finger seal with complicated structure simple and easy especially for multi-layer finger seal system,but also suggest a useful method for designing the finger seal with good dynamic behavior by means of different seal layers assembly.

关键词： finger seal dynamic behavior vibration

Optimal Design of Stewart Platform Safety Mechanism

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Chinese Journal of Aeronautics 2007年第4期20卷 370-377页

作者： chen hua chen Weishan Liu Junkao School of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China

A safety mechanism capable of moving at will within the range of its whole link lengths is designed based on the link space. Sixteen extreme poses are obtained in a Stewart platform. The singular points of the extreme poses are solved by using homotopy method as well as the judgment condition of singular points, and thereby the maximum link lengths are achieved. The rotation angles of joints and the distances between two neighboring links are analyzed in a calculation example in which that the mechanism moves among the extreme poses is assumed. Then an algorithm to test the safety mechanism is presented taking the constraint conditions into account. A safety mechanism having optimal properties of global movement is worked out by optimizing all structural parameters through minimizing the average condition number of extreme poses.

关键词： parallel manipulator safety mechanism optimal design Stewart platform

Neottia wuyishanensis(Orchidaceae:Neottieae),a new species from Fujian,China

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Plant Diversity 2021年第5期43卷 426-431页

作者： Bing-hua chen Xiao-hua Jin College of Life Sciences Fujian Normal UniversityFuzhou 350117China State Key Laboratory of Systematic and Evolutionary Botany and Herbarium Institute of BotanyChinese Academy of SciencesBeijing 100093China The Public Service Platform for Industrialization Development Technology of Marine Biological Medicine and Products of the State Oceanic Administration Fujian Key Laboratory of Special Marine Bioresource Sustainable UtilizationSouthern Institute of OceanographyCollege of Life SciencesFujian Normal UniversityFuzhou 350117China

A new species,Neottia wuyishanensis(Neottieae,Orchidaceae),is described and illustrated from Wuyishan,Fujian,eastern China,based on morphological characters and molecular *** phylogenetics indicate that *** is nested within the clade formed by Neottia fugongensis and Neottia ***,*** is similar to *** and ***,but differs from them by having indistinct auricles at the base,and in the shape and size of lobelets.

关键词： China Neottia wuyishanensis New species Orchidaceae