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Meta analysis of application of acupuncture combined with drug anesthesia in anorectal surgery

Journal of Hainan Medical University 2020年第18期26卷 40-45页

作者： Jia-Bin Liang Yue Liu Xin-Jun Liu Yang wei wei-chuan kuang Yan-Qing Lu Department of Acupuncture and Rehabilitation Guangzhou University of Chinese Medicine 510405 Guangdong Provincial Second Traditional Chinese Medicine Hospital Department of Acupuncture and Rehabilitation 510095

Objective:To evaluate the effectiveness and safety of acupuncture combined drug anesthesia and simple drug anesthesia in anorectal ***:The randomized controlled trials of acupuncture combined with drug anesthesia was evaluated using Cochrane systematic review *** search scope was China National Knowledge Internet,wanfang database,China Biomedical Literature,Pubmed and *** deadline was December 31,*** randomized controlled trials of acupuncture combined with anesthesia that met the inclusion criteria were *** terms of trial quality evaluation,Cochrane risk bias was used for ***,RevMan 5.2 software was used for statistical ***:This study finally included 15 articles,a total of 1321 *** heterogeneity of significant rate was good,and the combined effect amount OR was 3.55(95%CI[2.06,6.12]).The combined effect quantitative test(Z=4.57,P<0.00001)showed that there was a statistical significance,indicating that acupuncture combined drug anesthesia was better than simple anesthesia in anorectal *** heterogeneity of adverse reactions was good,and the combined effect test(Z=8.88,P<0.00001)showed that there was a statistical significance,indicating that the adverse reaction rate of acupuncture combined with drug anesthesia was lower than that of simple drug anesthesia in the anorectal ***:Compared with simple drug anesthesia,acupuncture combined with drug anesthesia can improve the anesthesia effect and reduce the occurrence of adverse reactions in anorectal surgery.

关键词： Acupuncture anesthesia Anorectal surgery Randomized control Review Systematic review

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Optimization on bicriterion policies for M/G/1 system with second optional service

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第10期9卷 1437-1445页

作者： Jau-chuan KE Yunn-kuang CHU Department of Applied Statistics National Taichung Institute of Technology Taichung 404 Taiwan China

We compare the optimal operating cost of the two bicriterion policies, and , for an M/G/1 queueing system with second optional service, in which the length of the vacation period is randomly controlled either by the number of arrivals during the idle period or by a timer. After all the customers are served in the queue exhaustively, the server immediately takes a vacation and may operate policy or policy. For the two bicriterion policies, the total average cost function per unit time is developed to search the optimal stationary operating policies at a minimum cost. Based upon the optimal cost the explicit forms for joint optimum threshold values of (p,T) and (p,N) are obtained.

关键词： Average operating cost Bicriterion policy Optimization comparisons Optional service Optimal threshold values

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Progress in application of rare metals in superalloys

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Rare Metals 2014年第2期33卷 111-126页

作者： kuang-Di Xu Zhong-Ming Ren chuan-Jun Li Laboratory of Modern Metallurgy and Material Processing Shanghai University

Rare metals play an important role in development of superalloys. Over the last two decades, the application of the rare metals in superalloys has achieved progress significantly. They present multi-beneficial effects for strengthening the matrix and the cophase, increasing the lattice misfit, cleaning the grain boundary, improving the carbides and eutectics, refining the grain, stabilizing the oxidation film, etc., so that the elevated temperature rupture life and elevated temperature oxidation resistance are improved significantly, leading to a broad application in the superalloys. In order to meet the higher demand for better superalloys in the future, more intensive research is necessary on the effects of the rare metals on the superalloy, and especially on the combination effect of various rare metals and mutual influence among them. Utilization of the computational materials science and combinatorial high throughput experiment will be of importance in application of rare metals in superalloys.

关键词： Superalloys Rare metals Strengthening Carbide Intermetallics Elevated temperature mechnical property Oxidation resistance Rupture life Creep resistance

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基于数据挖掘技术的拖拉机发动机故障诊断

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农机化研究 2025年第2期47卷 244-248页

作者：匡伟祥郴州职业技术学院现代装备制造学院湖南郴州423000

拖拉机是农业生产的重要工具,发动机是其核心部件,如发动机出现故障,将会直接影响农业生产效率和产量。为此,提出了一种使用数据挖掘技术进行拖拉机发动机故障诊断的方法。利用了机器学习技术和统计学,首先针对拖拉机田间运行信号噪音... 详细信息

拖拉机是农业生产的重要工具,发动机是其核心部件,如发动机出现故障,将会直接影响农业生产效率和产量。为此,提出了一种使用数据挖掘技术进行拖拉机发动机故障诊断的方法。利用了机器学习技术和统计学,首先针对拖拉机田间运行信号噪音较大的问题,引入小波阈值去噪的方法;其次,基于卷积神经网络模型,引入一种注意力机制,提高故障诊断准确率,并通过对拖拉机传感器数据进行分析,可以帮助诊断和预测发动机故障;最后,通过实验结果验证了算法的有效性。研究结果不仅可以提高故障的准确性和效率,还能够节约维修成本和提高机器的利用率,具有较高的应用价值。

关键词：拖拉机发动机故障诊断数据挖掘技术机器学习特征选择

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An improved imaging algorithm for spaceborne MAPs sliding spotlight SAR with high-resolution wide-swath capability

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Chinese Journal of Aeronautics 2015年第4期28卷 1178-1188页

作者： kuang Hui Chen Jie Yang wei Liu wei School of Electronic and Information Engineering Beihang University Electronic and Electrical Engineering Department University of Sheffield

Conventional synthetic aperture radar（SAR） systems cannot achieve both highresolution and wide-swath imaging *** problem can be mitigated by employing multiple-azimuth-phases（MAPs） technology for spaceborne sliding spotlight SAR ***, traditional imaging algorithms have met challenges to process the data accurately, due to range model error, MAPs data reconstruction problem, high-order cross-coupling phase error and variation of Doppler parameters along the azimuth ***, an improved imaging algorithm is proposed for solving the above ***, a modified hyperbolic range equation（MHRE） is proposed by introducing a cubic term into the traditional hyperbolic range equation（THRE）.And two curved orbit correction methods are derived based on the proposed range ***, a MAPs sliding spotlight data reconstruction method is introduced, which solves the spectral aliasing problem by a de-rotation ***, high-order cross-coupling phases and variation of Doppler parameters are analyzed and the corresponding compensation methods are *** results for point-target scene are provided to verify the effectiveness of the proposed algorithm.

关键词： High resolution Imaging Multiple-azimuth-phasesSliding spotlight Synthetic aperture radarWide swath

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Adaptive thermo-fluid moving boundary computations for interfacial dynamics

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Acta Mechanica Sinica 2012年第4期28卷 999-1021页

作者： Chih-kuang Kuan Jaeheon Sim wei Shyy University of Michigan Ann ArborMIUSA Hong Kong University of Science and Technology

In this study, we present adaptive moving boundary computation technique with parallel implementation on a distributed memory multi-processor system for large scale thermo-fluid and interfacial flow computations. The solver utilizes Eulerian-Lagrangian method to track moving （Lagrangian） interfaces explicitly on the stationary （Eulerian） Cartesian grid where the flow fields are computed. We address the domain decomposition strategies of Eulerian- Lagrangian method by illustrating its intricate complexity of the computation involved on two different spaces inter- actively and consequently, and then propose a trade-off ap- proach aiming for parallel scalability. Spatial domain decomposition is adopted for both Eulerian and Lagrangian do- main due to easy load balancing and data locality for mini- mum communication between processors. In addition, parallel cell-based unstructured adaptive mesh refinement （AMR） technique is implemented for the flexible local refinement and even-distributed computational workload among processors. Selected cases are presented to highlight the computa- tional capabilities, including Faraday type interfacial waves with capillary and gravitational forcing, flows around varied geometric configurations and induced by boundary conditions and/or body forces, and thermo-fluid dynamics with phase change. With the aid of the present techniques, large scale challenging moving boundary problems can be effectively addressed.

关键词： Moving boundary Eulerian-Lagrangian method Parallel adaptive mesh refinement

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Electrochemical hydrogen evolution efficiently boosted by interfacial charge redistribution in Ru/MoSe_(2) embedded mesoporous hollow carbon spheres

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Journal of Energy Chemistry 2023年第10期85卷 447-454,I0012页

作者： Yubin kuang wei Qiao Fulin Yang Ligang Feng School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina

The strong metal-support interaction inducing combined effect plays a crucial role in the catalysis reaction. Herein, we revealed that the combined advantages of MoSe_(2), Ru, and hollow carbon spheres in the form of Ru nanoparticles(NPs) anchored on a two-dimensionally ordered MoSe_(2) nanosheet-embedded mesoporous hollow carbon spheres surface(Ru/MoSe_(2)@MHCS) for the largely boosted hydrogen evolution reaction(HER) performance. The combined advantages from the conductive support, oxyphilic MoSe_(2), and Ru active sites imparted a strong synergistic effect and charge redistribution in the Ru periphery which induced high catalytic activity, stability, and kinetics for HER. Specifically, the obtained Ru/MoSe_(2)@MHCS required a small overpotential of 25.5 and 38.4 mV to drive the kinetic current density of 10 mA cm^(-2)both in acid and alkaline media, respectively, which was comparable to that of the Pt/C catalyst. Experimental and theoretical results demonstrated that the charge transfer from MoSe_(2) to Ru NPs enriched the electronic density of Ru sites and thus facilitated hydrogen adsorption and water dissociation. The current work showed the significant interfacial engineering in Ru-based catalysts development and catalysis promotion effect understanding via the metal-support interaction.

关键词： Hydrogen evolution reaction Ruthenium Electrocatalyst MoSe_(2) Mesoporous hollow carbon spheres

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Experimental and numerical study of tip injection in a subsonic axial flow compressor

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Chinese Journal of Aeronautics 2017年第3期30卷 907-917页

作者： wei WANG Wuli CHU Haoguang ZHANG Haiyang kuang School of Power and Energy Northwestern Polytechnical University Xi'an 710072 China Faculty of Water Resources and Hydroelectric Engineering Xi'an University of Technology Xi'an 710048 China Collaborative Innovation Center of Advanced Aero-Engine Beijing 100083 China

Parametric study of tip injection was implemented experimentally on a subsonic axial flow compressor to understand the underlying flow mechanisms of stability improvement of the compressor with discrete tip *** throat height varied from 2 to 6 times the height of rotor tip clearance,and circumferential coverage percentage ranged from 8.3% to 25% of the *** pressure fluctuations over the rotor tip were measured with fast-response pressure ***-passage time-accurate simulations were also carried out to help us understand the flow *** combinations of tip injection with traditional casing treatments were experimentally studied to generate an engineering-acceptable method of compressor stall *** results indicate that the maximum stability improvement is achieved when injectors are choked despite their different *** effect of circumferential coverage percentage on compressor stability depends on the value of injector throat height for un-choked injectors,and vice *** blockage in the blade passage is greatly reduced by the choked injectors,which is the primary reason for stability *** accomplishment of blockage diminishment is maintained in the circumferential direction with the unsteady effect of tip injection,which manifests as a hysteresis between the recovery of tip blockage and the recovery of tip leakage *** unsteady effect is primarily responsible for the effectiveness of tip injection with a partial circumferential *** injection cannot enhance the stability of the rotor with axial slots significantly,but it can improve the stability of the rotor with circumferential grooves *** combined structure of tip injection with circumferential grooves is an alternative for engineering application.

关键词： Axial flow compressor Casing treatments Compressor stability Tip blockage Tip injection Tip leakage vortex

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Ionic thermal up-diffusion in nanofluidic salinity-gradient energy harvesting

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National Science Review 2019年第6期6卷 1266-1273页

作者： Rui Long Zhengfei kuang Zhichun Liu wei Liu School of Energy and Power Engineering Huazhong University of Science and Technology

Advances in nanofabrication and materials science give a boost to the research in nanofluidic energy harvesting. Contrary to previous efforts on isothermal conditions, here a study on asymmetric temperature dependence in nanofluidic power generation is conducted. Results are somewhat counterintuitive. A negative temperature difference can significantly improve the membrane potential due to the impact of ionic thermal up-diffusion that promotes the selectivity and suppresses the ion-concentration polarization,especially at the low-concentration side, which results in dramatically enhanced electric power. A positive temperature difference lowers the membrane potential due to the impact of ionic thermal down-diffusion,although it promotes the diffusion current induced by decreased electrical resistance. Originating from the compromise of the temperature-impacted membrane potential and diffusion current, a positive temperature difference enhances the power at low transmembrane-concentration intensities and hinders the power for high transmembrane-concentration intensities. Based on the system's temperature response, we have proposed a simple and efficient way to fabricate tunable ionic voltage sources and enhance salinity-gradient energy conversion based on small nanoscale biochannels and mimetic nanochannels. These findings reveal the importance of a long-overlooked element—temperature—in nanofluidic energy harvesting and provide insights for the optimization and fabrication of high-performance nanofluidic power devices.

关键词： energy harvesting ionic thermal up-diffusion ionic voltage source nanofluidics

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Performance Analysis of the Packet-Based PNT Service in NGSO Broadband Satellite Communication Systems

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China Communications 2023年第9期20卷 247-259页

作者： Xi Chen Qihui wei Yafeng Zhan Linling kuang National Information Science and Technologies Research Center Tsinghua UniversityBeijing100084China Department of Electronic Engineering Tsinghua UniversityBeijing100084China

Providing alternative PNT service to GNSS-challenged users will be an important function of next-generation NGSO broadband satellite communication ***,a packet-based PNT service architecture in NGSO broadband systems is proposed in which a primary satellite and selected assistant satellites work together to provide PNT service to requesting *** positioning performance bounds are mathematically formulated by rigorously analyzing the bounds constrained by different *** are conducted on different configurations of Walker Delta MEO constellations and Walker Star LEO constellations for corroboration,revealing the following:(1)Both MEO and LEO constellations achieve sub-meter-level positioning precision given enough satellites.(2)Compared to the GNSS Doppler-based velocity estimation method,the position advance based velocity estimation algorithm is more precise and applicable to the PNT service in NGSO broadband systems.(3)To provide PNT service to users in GNSS-challenged environments,the primary and each assistant satellite need only∼0.1‰of the time of one downlink beam.

关键词： 6G non-terrestrial network NGSO satellite positioning performance analysis

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