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人血白蛋白在胃肠外科围手术期的合理应用

世界华人消化杂志 2024年第8期32卷 569-575页

作者：贾祥浩高鑫鑫殷振华孔帅山东省立医院山东第一医科大学附属省立医院胃肠外科山东省济南市250021 武田国际贸易有限公司山东省济南市250000

血清白蛋白是调节血流动力和代谢的关键成分,胃肠道手术围术期低白蛋白血症是预测术后并发症和预后的重要指标.结合疾病状态、病理原因等因素,人血白蛋白是成人胃肠道大手术或危重患者液体管理的重要选择,对改善围术期安全性和预后可能... 详细信息

血清白蛋白是调节血流动力和代谢的关键成分,胃肠道手术围术期低白蛋白血症是预测术后并发症和预后的重要指标.结合疾病状态、病理原因等因素,人血白蛋白是成人胃肠道大手术或危重患者液体管理的重要选择,对改善围术期安全性和预后可能具有突出的临床意义.本文对血清白蛋白作为生物标记物预测疾病转归,以及人血白蛋白辅助液体管理的相关研究进行综述,旨在为胃肠外科围术期临床合理用药提供参考,并探讨了包括提高研究质量、扩展研究内容等未来的相关研究方向.

关键词：人血白蛋白胃肠手术液体疗法

Harmonic information transitions of spatiotemporal metasurfaces

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Light(Science & Applications) 2020年第1期9卷 58-70页

作者： Haotian Wu xin xin gao Lei Zhang Guo Dong Bai Qiang Cheng Lianlin Li Tie Jun Cui State Key Laboratory of Millimetre Waves Southeast University210096 NanjingChina Institute of Electromagnetic Space Southeast University210096 NanjingChina State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsPeking University100871 BeijingChina

Facilitated by ultrafast dynamic modulations,spatiotemporal metasurfaces have been identified as a pivotal platform for manipulating electromagnetic waves and creating exotic physical phenomena,such as dispersion cancellation,Lorentz reciprocity breakage,and Doppler *** by emerging information-oriented technologies,we hereby probe the information transition mechanisms induced by spatiotemporal variations and present a general model to characterize the information processing capabilities of the spatiotemporal *** theory and abstract number theory are adopted through this investigation,by which the group extension and independent controls of multiple harmonics are proposed and demonstrated as two major tools for information transitions from the spatiotemporal domain to the spectra-wavevector *** incorporating Shannon’s entropy theory into the proposed model,we further discover the corresponding information transition efficiencies and the upper bound of the channel capacity of the spatiotemporal *** results of harmonic information transitions show great potential in achieving high-capacity versatile information processing systems with spatiotemporal metasurfaces.

关键词： surface transitions surfaces

Glide symmetry for mode control and significant suppression of coupling in dual-strip SSPP transmission lines

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Advanced Photonics 2021年第2期3卷 68-77页

作者： Xiao Tian Yan Wenxuan Tang Jun Feng Liu Meng Wang xin xin gao Tie Jun Cui Southeast University School of Information Science and EngineeringState Key Laboratory of Millimeter WavesNanjingChina Southeast University Institute of Electromagnetic SpaceNanjingChina

Glide symmetry,which is one kind of higher symmetry,is introduced in a special type of plasmonic metamaterial,the transmission lines(TLs)of spoof surface plasmon polaritons(SSPPs),in order to control the dispersion characteristics and modal fields of the *** show that the glide-symmetric TL presents merged pass bands and mode degeneracy,which lead to broad working bandwidth and extremely low coupling between neighboring ***-conductor SSPP TLs with and without glide symmetry are arranged in parallel as two channels with very deep subwavelength separation(e.g.,λ0∕100 at 5 GHz)for the application of integrated circuits and *** coupling between the hybrid channels is analyzed using coupled mode theory and characterized in terms of scattering parameters and near-field *** demonstrate theoretically and experimentally that the hybrid TL array obtains significantly more suppressed crosstalk than the uniform array of two nonglide symmetric ***,it is concluded that the glide symmetry can be adopted to flexibly design the propagation of SSPPs and benefit the development of highly compact plasmonic circuits.

关键词： glide symmetry spoof surface plasmon polaritons dispersion control mode degeneracy coupling suppression

Integrated spoof plasmonic circuits

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Science Bulletin 2019年第12期64卷 843-855页

作者： Jingjing Zhang Hao-Chi Zhang xin-xin gao Le-Peng Zhang Ling-Yun Niu Pei-Hang He Tie-Jun Cui State Key Laboratory of Millimeter Waves Southeast University

Using a metamaterial consisting of metals with subwavelength surface patterning, one can mimic surface plasmon polaritons(SPPs) and achieve surface waves with subwavelength confinement at microwave and terahertz frequencies, thus bringing most of the advantages associated with the optical SPPs to lower frequencies. Due to the properties of strong field confinement and high local field intensity, spoof SPPs have demonstrated the improved performance for data transmission and device miniaturization in an intensively integrated environment. The distinctive abilities, such as suppression of transmission loss and bending loss, and increase of signal integrity, make spoof SPPs a promising candidate for future generation of electronic circuits and electromagnetic systems. This article reviews the progress in spoof SPPs with a special focus on their applications in circuits from transmission lines to passive and active devices in microwave and terahertz regimes. The integration of versatile spoof SPP devices on a single platform,which is compatible with established electronic circuits, is also discussed.

关键词： Spoof surface plasmons Metamaterial Electromagnetic system Integrated circuits

Colonic tubular duplication combined with congenital megacolon:A case report

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World Journal of Clinical Cases 2022年第34期10卷 12768-12774页

作者： Zhe-Ming Zhang Shuai Kong xin-xin gao Xiang-Hao Jia Chun-Ning Zheng School of Clinical Medicine Weifang Medical UniversityWeifang 261053Shandong ProvinceChina Department of Gastrointestinal Surgery Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250000Shandong ProvinceChina

BACKGROUND Colonic duplication refers to a spherical or tubular cavity which shows similar properties with the native colon and is attached to the mesenteric side of the alimentary *** is the rarest in alimentary tract *** upon anatomic feature,colonic duplications can be classified as spherical(cystic)or tubular,with the latter being less common(approximately 20%).Symptoms of colonic duplication are dependent on the duplication site and extent,and patient age,***,patients with colonic duplication manifest typical intestinal obstruction,potentially accompanied by recurrent dark or bright red bloody stool,varying degrees of anemia-related symptoms,and body *** SUMMARY A young male patient was admitted to our hospital due to recurrent abdominal *** definite diagnosis was achieved by computed tomography(CT)or electronic colonoscopy,and the bowel preparation efficacy was *** disease was suspected,and thus laparoscopic exploration was *** approximately 60-cm-long inverted duplicated colon with severe edema and dilation was *** originated from the mesenteric side of the transverse colon and ended in the terminal part of the descending colon with a blind *** parallel native colon had a thickened colonic wall,became stiff,and was poor in *** patient then underwent subtotal colectomy and was discharged 7 d after the *** 3 mo post-surgery to date,the patient had regular bowel movement once daily and a steady increase in body *** Tubular colonic duplication is a rare type of alimentary tract duplication that can be detected by ultrasonography,CT,or magnetic resonance imaging based on the actual clinical *** resection of aberrant colon(including the duplicated colonic segment and other potentially involved colonic segments)is the only approach to cure this medical condition.

关键词： Colonic duplication Chronic constipation Subtotal colectomy Congenital megacolon Case report

Love wave propagation in one-dimensional piezoelectric quasicrystal multilayered nanoplates with surface effects

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 619-632页

作者： xin FENG Liaoliang KE Yang gao College of Science China Agricultural UniversityBeijing 100083China School of Mechanical Engineering Tianjin UniversityTianjin 300350China

The exact solutions for the propagation of Love waves in one-dimensional(1D)hexagonal piezoelectric quasicrystal(PQC)nanoplates with surface effects are *** electro-elastic model is developed to investigate the anti-plane strain problem of Love wave *** introducing three shape functions,the wave equations and electric balance equations are decoupled into three uncorrelated *** the boundary conditions of the top surface on the covering layer,the interlayer interface,and the matrix,a dispersive equation with the influence of multi-physical field coupling is provided.A surface PQC model is developed to investigate the surface effects on the propagation behaviors of Love waves in quasicrystal(QC)multilayered structures with nanoscale thicknesses.A novel dispersion relation for the PQC structure is derived in an explicit closed form according to the non-classical mechanical and electric boundary *** examples are given to reveal the effects of the boundary conditions,stacking sequence,characteristic scale,and phason fluctuation characteristics on the dispersion curves of Love waves propagating in PQC nanoplates with surface effects.

关键词： piezoelectric quasicrystal(PQC)material multilayered plate dispersion characteristic surface effect

Microstructure evolution and strengthening mechanism of high -performance powder metallurgy TA15 titanium alloy by hot rolling

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1426-1436页

作者： Ying gao Ce Zhang Jiazhen Zhang xin Lu Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsInstitute for Advanced Ma-terials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Engineering Research Center for Advanced Rolling Technology National Engineering Research Center for Flat Rolling EquipmentInstitute of Engin-eering TechnologyUniversity of Science and Technology BeijingBeijing 100083China

Hot deformation of sintered billets by powder metallurgy(PM)is an effective preparation technique for titanium alloys,which is more significant for high-alloying *** this study,Ti–6.5Al–2Zr–Mo–V(TA15)titanium alloy plates were prepared by cold press-ing sintering combined with high-temperature hot *** microstructure and mechanical properties under different process paramet-ers were *** microscope,electron backscatter diffraction,and others were applied to characterize the microstructure evolution and mechanical properties strengthening *** results showed that the chemical compositions were uniformly dif-fused without segregation during sintering,and the closing of the matrix craters was accelerated by increasing the sintering *** block was hot rolled at 1200℃ with an 80%reduction under only two passes without *** strength and elongation of the plate at 20–25℃ after solution and aging were 1247 MPa and 14.0%,respectively,which were increased by 24.5%and 40.0%,respect-ively,compared with the as-sintered alloy at 1300℃.The microstructure was significantly refined by continuous dynamic recrystalliza-tion,which was completed by the rotation and dislocation absorption of the substructure surrounded by low-angle grain *** hot rolling combined with heat treatment,the strength and plasticity of PM-TA15 were significantly improved,which resulted from the dense,uniform,and fine recrystallization structure and the synergistic effect of multiple slip systems.

关键词： elemental powder powder metallurgy titanium alloy hot rolling strength and plasticity

Flow Field Simulation and Parameter Analysis of Hydraulic Unbalanced Bionic Self-recovery Actuator for Rotary Equipment

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Journal of Bionic Engineering 2024年第1期21卷 325-343页

作者： Wei Li xin Pan Dehong Ge Jinji gao Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of High-End Mechanical Equipment Health Monitoring and Self-Recovery Beijing University of Chemical TechnologyBeijing 100029China

The rotor is the most important component of rotating machinery,and the vibration produced by its mass unbalance has a serious influence on the secure and steady operation of the machine,so an effective online suppression technology is urgently needed.A new hydraulic unbalanced bionic self-recovery system is introduced,imitating the way of manually repairing faulty *** accomplish the effect of actuator mass redistribution,the technology employs pressurized air to drive the quantitative transfer of liquid in the reservoir cavity at opposite *** can complete the online adjustment of the equipment's balancing state and suppress the unbalanced vibration of equipment in real time,which gives the equipment the ability to maintain an autonomous health state and improve equipment *** composition and working principle of the system are introduced in detail,and the key performance parameters,such as the minimum running speed and the balancing liquid transfer speed,are analyzed *** fluid-solid coupling model of the actuator was established,and the two-phase flow from inside the hydraulic unbalanced bionic self-recovery actuator was simulated under multiple working conditions and the performance parameters were quantitatively analyzed.A balancing simulation test bed was built,and its effectiveness was verified by performance parameter tests and unbalanced bionic self-recovery *** experimental results show that the mass distribution adjustment of the balancing disk can be achieved using different viscosity balancing liquid,and the response of liquid viscosity 10 cSt is faster than that of liquid viscosity 100 cSt in the process of balancing liquid transfer,and the time is reduced by more than 75%;the system can reduce the simulated rotor amplitude from 18.3μm to 10.6μm online in real time,which provides technical support for the subsequent development of a new generation of bionic intelligent equipment.

关键词： Engineering self-recovery-Bionics Simulation analysis Self-recovery regulation

Cascaded four-wave mixing all-optical wavelength converter based on highly nonlinear fiber deposited graphene oxide

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Journal of Materials Science & Technology 2024年第4期171卷 10-15页

作者： Yuanhongliu gao Xiaoyu Chen Tonglei Cheng Fang Wang xin Yan College of Information Science and Engineering State Key Laboratory of Synthetical Automation for Process IndustriesNortheastern UniversityShenyang 110819China

The all-optical wavelength conversion using cascaded four-wave mixing(FWM)phenomena with graphene oxide(GO)and a highly nonlinear fiber(HNLF)device is demonstrated *** has a strong third-order nonlinear effect and is an excellent nonlinear optical material for nonlinear optical wavelength *** group velocity matching of pump and signal,HNLF,and GO amplification promote the cascaded nonlinear frequency mixing *** the experimental and analytical results,the maximum spacing between signal and pump is 21 nm,and specifically,the order of cascaded FWM light increases from order 1 to order 2 with increasing GO,and the first-order FWM conversion effi-ciency increases to a maximum of−14.5 *** the best of our knowledge,this is the first time that cascaded FWM-based all-optical wavelength conversion in HNLF-GO with wide wavelength selectivity is investigated with combined pump and signal *** findings not only provide an effective method for achieving all-optical wavelength conversion in cascaded FWM but also offer the possibility of fabricating high-performance nonlinear optical devices.

关键词： Four-wave mixing Graphene oxide Highly nonlinear fiber Optical wavelength conversion