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腹膜透析对慢性肾衰竭患者氧化应激及钙磷代谢的影响

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罕少疾病杂志 2024年第8期31卷 80-82页

作者：何国斌郭利芹王焕新乡市中心医院肾内科河南新乡453000

目的探讨腹膜透析在慢性肾衰竭(CRF)患者中的应用价值。方法回顾性分析2020年7月至2022年7月我院收治的CRF患者94例的临床资料。按照透析方式的不同进行分组,行血液透析的47例CRF患者为对照组,行腹膜透析的47例CRF患者为观察组,两组均治... 详细信息

目的探讨腹膜透析在慢性肾衰竭(CRF)患者中的应用价值。方法回顾性分析2020年7月至2022年7月我院收治的CRF患者94例的临床资料。按照透析方式的不同进行分组,行血液透析的47例CRF患者为对照组,行腹膜透析的47例CRF患者为观察组,两组均治疗6个月。对比分析两组氧化应激、钙磷代谢、炎症因子水平、肾功能、营养状态及并发症。结果治疗后,观察组丙二醛(MDA)(9.04±1.18)nmol/mL、髓过氧化物酶(MPO)(6.32±1.05)U/L、磷离子(1.38±0.26)mmol/L、超敏C反应蛋白(hs-CRP)(7.31±1.09)mg/L、肿瘤坏死因子-α(TNF-α)(35.31±3.54)ng/L、白介素(IL)-6(32.50±3.28)pg/L、IL-8(47.31±5.48)pg/L、尿素氮(BUN)(19.27±2.54)mmol/L、血肌酐(Scr)(461.47±21.46)μmol/L、白蛋白(ALB)(30.94±2.88)g/L,低于对照组的(11.26±1.53)nmol/mL、(8.06±1.42)U/L、(1.65±0.38)mmol/L、(9.26±1.57)mg/L、(42.58±4.39)ng/L、(38.21±4.31)pg/L、(60.48±7.31)pg/L、(22.49±3.08)mmol/L、(497.69±23.86)μmol/L、(33.89±2.17)g/L,超氧化物歧化酶(SOD)(159.58±7.82)U/mL、总抗氧化能力(T-AOC)(7.48±1.22)U/L、血红蛋白(Hb)(117.95±12.75)g/L,高于对照组的(137.77±7.26)U/mL、(5.19±0.96)U/L、(106.79±11.84)g/L,差异有统计学意义(P0.05)。结论腹膜透析能够更好的减轻CRF患者机体氧化应激损伤,调节钙磷代谢,抑制炎症反应,改善肾功能,提高Hb水平,但治疗中可能造成ALB下降,引发低蛋白血症,故临床需及时补充ALB,提高治疗安全性。

关键词：慢性肾衰竭腹膜透析氧化应激钙磷代谢炎症因子肾功能营养状态

维普期刊数据库博看期刊

Quantum coherence and correlation dynamics of two-qubit system in spin bath environment

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Chinese Physics B 2020年第4期29卷 154-159页

作者： Hao Yang li-guo qin li-Jun Tian Hong-Yang Ma Department of Physics Shanghai UniversityShanghai 200444China School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China School of Science Qingdao University of TechnologyQingdao 266000China

The quantum entanglement,discord,and coherence dynamics of two spins in the model of a spin coupled to a spin bath through an intermediate spin are *** effects of the important physical parameters including the coupling strength of two spins,the interaction strength between the intermediate spin and the spin bath,the number of bath spins and the temperature of the system on quantum coherence and correlation dynamics are discussed in different *** frozen quantum discord can be observed whereas coherence does not when the initial state is the Bell-diagonal *** finite temperature,we find that coherence is more robust than quantum discord,which is better than entanglement,in terms of resisting the influence of ***,quantum coherence is more tenacious than quantum correlation as an important resource.

关键词： quantum coherence quantum correlation spin bath

Opto-electromechanically induced transparency in a hybrid opto-electromechanical system

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Chinese Physics B 2019年第10期28卷 579-584页

作者： Hui liu li-guo qin li-Jun Tian Hong-Yang Ma Department of Physics Shanghai UniversityShanghai 200444China School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China School of Science Qingdao University of TechnologyQingdao 266000China

We study opto-electromechanically induced transparency in a hybrid opto-electromechanical system made up of an optical cavity tunneling-coupled to an opto-mechanical cavity, which is capacitively coupled to a charged mechanical oscillator by a charged and moveable mechanical cavity mirror as an interface. By studying the effects of the different parameters on the output field, we propose a scheme to modulate the opto-electromechanically induced transparency(OEMIT). Our results show that the OEMIT with the transparency windows from single to double to triple can be modulated by changing the tunneling, opto-mechanical and electrical couplings. In addition, the explanation of the OEMIT with multi-windows is given by the energy level diagram based on quantum interference. Our investigation will provide an optimal platform to manipulate the transmission of optical field via microfabricated opto-electromechanical device.

关键词： opto-electromechanical system opto-electromechanically induced transparency pump-probe spectroscopy

Multiple induced transparency in a hybrid driven cavity optomechanical device with a two-level system

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Chinese Physics B 2021年第9期30卷 225-230页

作者： Wei Zhang li-guo qin li-Jun Tian Zhong-Yang Wang Department of Physics Shanghai UniversityShanghai 200444China School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

We present a scheme with the multiple-induced transparency windows in a hybrid optomechanical *** studying the transmission of a probe field through the hybrid device,we show the successive generations of three transparent windows induced by multiple factors including tunneling,optomechanical and qubit-phonon coupling interactions,and analyze the physical mechanism of the induced transparency based on a simplified energy-level diagram of the ***,the effects of the transition frequency and decay rate of the two-level system on the multiple-induced transparency windows are *** find that the transparency windows can be modulated by the coupling interaction between the qubit and NMR,the decay of qubit and the power of the control ***,the transmission of the probe field can be coherently adjusted in the hybrid cavity optomechanical device with a two-level system.

关键词： hybrid optomechanical device optomechanical induced transparency two-level system

Electro-optic waveform interconnect based on quantum interference

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Photonics Research 2017年第5期5卷 481-487页

作者： li-guo qin ZHONG-YANG WANG SHANG-qinG GONG HONG-YANG MA School of Science Qingdao University of Technology Shanghai Advanced Research Institute Chinese Academy of Sciences Department of Physics East China University of Science and Technology

The ability to modulate an optical field via an electric field is regarded as a key function of electro-optic interconnects, which are used in optical communications and information-processing systems. One of the main devices required for such interconnects is the electro-optic modulator(EOM). Current EOMs based on electro-optic and electro-absorption effects often are bulky and power-inefficient due to the weak electro-optic properties of their constituent materials. Here, we propose a new mechanism to produce an arbitrary-waveform EOM based on quantum interference, in which both real and imaginary parts of the susceptibility are engineered coherently with super-high efficiency. Based on this EOM, a waveform interconnect from the voltage to the modulated optical absorption is realized. We expect that such a new type of electro-optic interconnect will have a broadrange of applications, including in optical communications and networks.

关键词： Electro-optic waveform interconnect based on quantum interference EOM EIT

Phase-dependent double optomechanically induced transparency in a hybrid optomechanical cavity system with coherently mechanical driving

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Chinese Physics B 2019年第7期28卷 233-242页

作者： Shi-Chao Wu li-guo qin Jian Lu Zhong-Yang Wang Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China School of Mathematics Physics and Statistics Shanghai University Of Engineering Science Shanghai 201620 China University of Chinese Academy of Sciences Beijing 100049 China

We propose a scheme that can generate tunable double optomechanically induced transparency in a hybrid optomechanical cavity *** this system, the mechanical resonator of the optomechanical cavity is coupled with an additional mechanical resonator and the additional mechanical resonator can be driven by a weak external coherently mechanical driving *** show that both the intensity and the phase of the external mechanical driving field can control the propagation of the probe field, including changing the transmission spectrum from double windows to a *** study also provides an effective way to generate intensity-controllable, narrow-bandwidth transmission spectra, with the probe field modulated from excessive opacity to remarkable amplification.

关键词： double optomechanically induced transparency hybrid optomechanical cavity system pump– probe spectroscopy mechanical driving

Quantum speed limit for mixed states in a unitary system

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Chinese Physics B 2022年第11期31卷 236-243页

作者： Jie-Hui Huang li-guo qin Guang-Long Chen li-Yun Hu Fu-Yao liu School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China College of Physics and Communication Electronics Jiangxi Normal UniversityNanchang 330022China

Since the evolution of a mixed state in a unitary system is equivalent to the joint evolution of the eigenvectors contained in it,we could use the tool of instantaneous angular velocity for pure states to study the quantum speed limit(QSL)of a mixed *** derive a lower bound for the evolution time of a mixed state to a target state in a unitary system,which automatically reduces to the quantum speed limit induced by the Fubini–Study metric for pure *** computation of the QSL of a degenerate mixed state is more complicated than that of a non-degenerate mixed state,where we have to make a singular value decomposition(SVD)on the inner product between the two eigenvector matrices of the initial and target *** combing these results,a lower bound for the evolution time of a general mixed state is *** order to compare the tightness among the lower bound proposed here and lower bounds reported in the references,two examples in a single-qubit system and in a single-qutrit system are studied analytically and numerically,*** conclusions derived in this work are independent of the eigenvalues of the mixed state,which is in accord with the evolution properties of a quantum unitary system.

关键词： quantum speed limit instantaneous angular velocity singular value decomposition

Reversible waveform conversion between microwave and optical fields in a hybrid opto-electromechanical system

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Chinese Physics B 2021年第6期30卷 691-697页

作者： li-guo qin Zhong-Yang Wang Jie-Hui Huang li-Jun Tian Shang-qing Gong School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Department of Physics Shanghai UniversityShanghai 200444China Department of Physics East China University of Science and TechnologyShanghai 200237China

We present a scheme of reversible waveform conversion between microwave and optical fields in the hybrid optoelectromechanical system. As an intermediate interface, nanomechanical resonator optomechanically couples both optomechanical cavities in the optical and microwave frequency domains. We find the double-optomechanically induced transparency and achieve coherent signal waveform bi-directional transfer between microwave and optical fields based on quantum interference. In addition, we give an analytical expression of one-to-one correspondence between the microwave field and the optical output field, which intuitively shows the reversible waveform conversion relationship. In particular,by numerical simulations and approximate expression, we demonstrate the conversion effects of the three waveforms and discuss the bi-directional conversion efficiency and the bandwidth. such a hybrid opto-and electro-mechanical device has significant potential functions for electro-optic modulation and waveform conversion of quantum microwave-optical field in optical communications and further quantum networks.

关键词： opto-electromechanical systems photoelectric conversion cavity quantum electrodynamics optoelectromechanically induced transparency

Fracture mechanism of inclusions in thick plate center under tensile loading

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Journal of Iron and Steel Research International 2024年第5期31卷 1196-1209页

作者： Lei Hu li-qin Zhang Feng Hu guo-hong Zhang Kuan Zheng Collaborative Innovation Center for Advanced Steels Wuhan University of Science and TechnologyWuhan430081HubeiChina Department of Applied Physics Wuhan University of Science and TechnologyWuhan430081HubeiChina Analysis and Testing Center Wuhan University of Science and TechnologyWuhan430081HubeiChina

Segregation of solute atoms in the center of thick plates of the tempered steel can cause an inhomogeneous structural transformation and generate micron-sized inclusions,which leads to lamellar tearing of thick plate and decreases the plasticity and *** formation and fragmentation mechanisms of micron-sized inclusions,like MnS and(Nb,Ti)C,in the center of thick plates were investigated by using thermodynamic calculations,finite element simulations,and electron backscatter diffraction characterization *** results show that micron-sized inclusions nucleate and grow in the liquid phase,and under tensile loading,they exhibit three fragmentation *** local stress during the fragmentation of inclusions is lower than the critical fracture stress of adjacent grains,and phase boundaries can effectively impede crack propagation into the *** existence of a low proportion of high-angle grain boundaries(58.1%)and high Kernel average misorientation value(0.534°)in the segregation band promotes inclusions fragmentation and crack *** difference in crack initiation and propagation direction caused by the morphology of inclusions and physical properties,as well as different matrix arrest abilities,is the main reasons for the diversity of inclusion fragmentation.

关键词： Thick plate Inclusion Finite element simulation Critical fracture stress Fracture mechanism