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Effects of Time Delay on Stability of an Unstable State in a Bistable System with Correlated Noises

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Chinese Physics Letters 2011年第4期28卷 40-42页

作者： LI Chun MEI Dong-Cheng Department of Computer Science Simao Teachers’CollegePuer 665000 Department of Physics Yunnan UniversityKunming 650091

Effects of time delay on stability of an unstable state in a time-delayed bistable system are *** analytic expression of the transition rate W(x_(u),τ)from unstable state xu to stable state x+is *** numerical calculation results of W(x_(u),τ)indicate that W(x_(u),τ)decreases with the increasing multiplicative noise intensity,the additive noise intensi by and the strength of correlations between the multiplicative and the additive noise increase,but W(x_(u),τ)increases with increasing delay ***,the multiplicative noise,the additive noise and the correlations between the multiplicative and the additive noises enhance the stability of the unstable state in the time-delayed bistable system but the stability is weakened by time delay.

关键词： unstable noise Effects

Intensity Correlation Function and Associated Relaxation Time of a Saturation Laser Model with Correlated Noises

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Chinese Physics Letters 2006年第1期23卷 29-31页

作者：朱平陈世波梅冬成 Department of Physics Yunnan University Kunming 650091 Department of Physics Simao Teacher's College Yunnan 665000

We investigate the intensity correlation function C（s） and its associated relaxation time Tc for a saturation model of single-mode laser with correlated noises. The expressions of O（s） and Tc are derived by means of the projection operator method, and effects of correlations between an additive noise and a multiplicative noise are discussed by numerical calculation. Based on the calculated results, it is found that the correlation strength A between the additive noise and the multiplicative noise can enhance the fluctuation decay of the laser intensity.

关键词： STEADY-STATE ANALYSIS DYE-LASER MULTIPLICATIVE NOISE COLORED-NOISE WHITE-NOISE PROCESSES DRIVEN QUANTUM FLUCTUATIONS TRANSIENT PROCESS STATISTICS SYSTEM

Efficiency and safety of laparoscopic left hemihepatectomy: A study of intrathecal vs extrathecal Glissonean pedicle techniques

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2612-2619页

作者： Li-Min Kang Lei Xu Fu-Wei Zhang Fa-Kun Yu Li Lang Department of Hepatobiliary and Pancreatic Surgery Puer People's HospitalPuer 665000Yunnan ProvinceChina Department of Outpatient Puer People's HospitalPuer 665000Yunnan ProvinceChina

BACKGROUND Selective hemihepatic vascular occlusion is utilized in both right and left hemihepatectomies to preserve blood supply to the intact lobe,maintain hemo-dynamic stability,and mitigate surgical *** this technique encompasses both intrathecal and extrathecal Glissonean pedicle transection methods,there is a lack of systematic comparative reports on these two *** To retrospectively analyze the clinical data of patients with hepatocellular carcinoma(HCC)undergoing laparoscopic anatomical hepatectomy in our hospital to explore the feasibility,safety,and short-and long-term efficacy of extrathecal and intrathecal Glissonean pedicle transection methods in laparo-scopic left *** A retrospective study was performed to analyze the clinical data of 49 HCC patients who underwent laparoscopic left hemihepatectomy from January 2019 to December 2022 in our *** patients were divided into extrathecal Glissonean pedicle transection(EGP)group(n=24)and intrathecal Glissonean pedicle transection(IGP)group(n=25)according to the different approaches used for selective hemihepatic vascular *** perioperative indicators,liver function indexes,complications,and follow-up findings were compared between these two *** The surgeries were smooth in both groups,and no perioperative death was *** hepatic pedicle transection time and the operation time were(16.1±2.3)minutes and(129.6±19.0)minutes,respectively,in the EGP group,which were significantly shorter than those in the IGP group[(25.5±2.4)minutes and(184.8±26.0)minutes,respectively],both P0.05).The incidence of postoperative complications showed no significant difference[16.67%(4/24)vs 16.0%(4/25),P>0.05].All the 49 HCC patients were followed up after surgery(range:11.2

关键词： Hepatocellular carcinoma Laparoscopy Extra-Glissonian approach Intra-Glissonian approach Surgical efficiency Surgical safety

MULTI-SYMPLECTIC FOURIER PSEUDOSPECTRAL METHOD FOR A HIGHER ORDER WAVE EQUATION OF KDV TYPE

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Journal of Computational Mathematics 2015年第4期33卷 379-395页

作者： Junjie Wang Mathematics and Statistical Institute Pu Er University Pu Er 665000 China Mathematics Department of Northwest University Xidn 710127 China

The higher order wave equation of KdV type, which describes many important physical phenomena, has been investigated widely in last several decades. In this work, multi- symplectic formulations for the higher order wave equation of KdV type are presented, and the local conservation laws are shown to correspond to certain well-known Hamiltonian functionals. The multi-symplectic discretization of each formulation is calculated by the multi-symplectic Fourier pseudospectral scheme. Numerical experiments are carried out, which verify the efficiency of the Fourier pseudospectral method.

关键词： The higher order wave equation of KdV type Multi-symplectic theory Fourierpseudospectral method Local conservation laws.

Subclinical paraganglioma of the retroperitoneum:A case report

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World Journal of Clinical Cases 2024年第15期12卷 2672-2677页

作者： Li-Min Kang Fa-Kun Yu Fu-Wei Zhang Lei Xu Department of Hepatobiliary and Pancreatic Surgery Puer People's HospitalPuer 665000Yunnan ProvinceChina

BACKGROUND Paraganglioma(PGL)located in the retroperitoneum presents challenges in diagnosis and treatment due to its hidden location,lack of specific symptoms in the early stages,and absence of distinctive manifestations on *** SUMMARY A 56-year-old woman presented with a left upper abdominal mass discovered 1 wk ago during a physical *** did not have a history of smoking,alcohol consumption,or other harmful habits,no surgical procedures or infectious diseases,and had a 4-year history of *** admission,she did not exhibit fever,vomiting,or abdominal *** examination indicated mild percussion pain in the left upper abdomen,with no palpable enlargement of the liver or *** tests and tumor markers showed no significant *** computed tomography and magnetic resonance imaging of the upper abdomen revealed a cystic solid mass in the left epigastrium measuring approximately 6.5 cm×4.5 cm,with inhomogeneous enhancement in the arterial phase,closely associated with the lesser curvature of the stomach and the *** patient underwent laparoscopic resection of the retroperitoneal mass,which was successfully removed without tumor rupture.A 12-month postoperative follow-up period showed good *** This case report details the successful laparoscopic resection of a retroperitoneal subclinical PGL,resulting in a good recovery observed at the 12-month ***,the patient also experienced unexpected cure of hypertensive disease.

关键词： Paraganglioma Retroperitoneal anatomy Subclinical Pheochromocytoma Laparoscopy Case report

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铁皮石斛多糖的结构表征与抗氧化活性研究

食品工业科技 2024年第19期45卷 32-39页

作者：李学玲白芩凡孙体杰陈丽萍张奇李素丽许苑南普洱学院茶叶咖啡学院云南普洱665000 普洱学院生物与化学学院云南普洱665000

为深入研究铁皮石斛多糖的抗氧化活性,以铁皮石斛为原料,提取纯化铁皮石斛多糖并表征其初步结构,从铁皮石斛多糖自由基清除能力和对低密度脂蛋白(Low Density Lipoprotein,LDL)体外氧化抑制效果两个方面评价其抗氧化活性。结果表明,铁... 详细信息

为深入研究铁皮石斛多糖的抗氧化活性,以铁皮石斛为原料,提取纯化铁皮石斛多糖并表征其初步结构,从铁皮石斛多糖自由基清除能力和对低密度脂蛋白(Low Density Lipoprotein,LDL)体外氧化抑制效果两个方面评价其抗氧化活性。结果表明,铁皮石斛多糖总糖含量90.17%±3.90%,蛋白质含量0.14%±0.05%,灰分含量4.47%±1.42%以及糖醛酸含量2.53%±1.02%,相对分子量23970 Da,单糖组成主要为甘露糖和葡萄糖。铁皮石斛多糖具有一定的自由基清除能力,可以抑制LDL氧化修饰体系中共轭二烯的产生,3.00 mg·mL^(−1)时铁皮石斛多糖对铜离子诱导的LDL氧化产生的硫代巴比妥酸反应产物(Thiobarbituric Acid Reactive Substances,TBARS)抑制率为57.46%±0.56%。本研究可为开发因LDL氧化导致的动脉粥样硬化(Arteriosclerosis,AS)等疾病药物提供理论支撑。

关键词：铁皮石斛多糖抗氧化低密度脂蛋白

玉米大豆间作对喀斯特区土壤理化性质及微生物碳代谢特征的影响

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作物学报 2025年第1期51卷 273-284页

作者：钱玉平宿兵兵高吉星阮粉花李亚伟茅林春滇西应用技术大学普洱茶学院云南普洱665000 兰州交通大学环境与市政工程学院甘肃兰州730070 甘肃省农业科学院作物研究所甘肃兰州730070 浙江大学生物系统工程与食品科学学院浙江杭州310000

为探明喀斯特区玉米大豆带状复合种植对土壤理化性质及微生物群落结构多样性的影响,本研究设置玉米大豆间作(MSI)、玉米单作(MM)和大豆单作(SM) 3种模式,采用Biolog-ECO微孔培养法,旨在揭示玉米大豆种植模式对土壤微生物碳源代谢活性、... 详细信息

为探明喀斯特区玉米大豆带状复合种植对土壤理化性质及微生物群落结构多样性的影响,本研究设置玉米大豆间作(MSI)、玉米单作(MM)和大豆单作(SM) 3种模式,采用Biolog-ECO微孔培养法,旨在揭示玉米大豆种植模式对土壤微生物碳源代谢活性、多样性以及土壤性质的影响及其机制。结果表明,与MM及SM相比, MSI土壤微生物群落丰富度指数(McIntoshindex)分别显著提高了11.90%和58.40%,平均颜色变化率(averagewellcolordevelopment, AWCD)分别显著增加了24.50%和80.10%,羧酸类、氨基酸类和酚酸类碳源的平均相对吸光度分别显著提高了34.50%、63.70%和61.80%;碳源代谢指纹图谱表明,MSI模式中土壤微生物通过提高衣康酸的代谢活性进而增加了对羧酸类碳源的利用,通过提高L-苯丙氨酸、L-苏氨酸和甘氨酰-L-谷氨酸的代谢活性从而增加了氨基酸类碳源利用,通过提高吐温40、吐温80和肝糖的代谢活性从而增加了对多聚类碳源的利用;同时, MSI处理土壤SOC分别较MM和SM显著提高8.50%和72.84%, NH_4~+-N和TN含量分别较SM处理显著增加46.70%和33.30%;主成分分析表明,提取的2个主成分解释了碳源利用总变异的79.69%,种植模式对碳源代谢的综合利用能力表现为MSI>MM>SM,其中MSI土壤微生物群落对羧酸类、氨基酸类和多聚类代谢利用能力最强;冗余分析则表明,显著影响碳源代谢利用的2个环境因子分别是TN (53.50%)和SOC (30.90%),其中TN促进了羧酸类和氨基酸类碳源的代谢利用, SOC加强了胺类和酚酸类碳源的利用。综上可见,玉米大豆间作模式土壤微生物碳代谢的偏好性主要由微生物群落结构多样性引起,同时又受土壤全氮和有机质含量的调控,表明微生物群落结构与土壤理化因子间的互作可能是大豆玉米复合种植增产增效的一个关键因素。

关键词：玉米大豆土壤微生物碳源代谢活性土壤理化性质 Biolog-ECO

Explicit Multi-symplectic Method for a High Order Wave Equation of KdV Type

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Communications in Mathematical Research 2018年第3期34卷 193-204页

作者： WANG JUN-JIE WANG XIU-YING School of Mathematics and Statistics Pu’er UniversityPu’erYunnan665000 School of Mathematics Northwest UniversityXi’an710127 Pu’er Meteorological Office of Yunnan Province Pu’erYunnan665000

In this paper, we consider multi-symplectic Fourier pseudospectral method for a high order integrable equation of KdV type, which describes many important physical phenomena. The multi-symplectic structure are constructed for the equation, and the conservation laws of the continuous equation are presented. The multisymplectic discretization of each formulation is exemplified by the multi-symplectic Fourier pseudospectral scheme. The numerical experiments are given, and the results verify the efficiency of the Fourier pseudospectral method.

关键词： the high order wave equation of KdV type multi-symplectic theory Hamilton space Fourier pseudospectral method local conservation law

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2015年云南省人体钩虫感染现状调查

中国寄生虫学与寄生虫病杂志 2020年第6期38卷 781-784页

作者：吴方伟汪丽波李奔福严信留字金荣彭佳蔡璇保雪莹杨亚明云南省寄生虫病防治所普洱665000 普洱学院普洱665000

为了解云南省人体钩虫病流行现状,于2015年按照《全国人体重点寄生虫病现状调查方案》和实施细则要求,采用分层整群随机抽样方法从全省抽取10个县(市)共20个调查点,每个调查点不少于250人,调查对象为1岁及以上本地常住人口,收集受检者粪... 详细信息

为了解云南省人体钩虫病流行现状,于2015年按照《全国人体重点寄生虫病现状调查方案》和实施细则要求,采用分层整群随机抽样方法从全省抽取10个县(市)共20个调查点,每个调查点不少于250人,调查对象为1岁及以上本地常住人口,收集受检者粪样,采用改良加藤厚涂片法检测钩虫卵,试管滤纸培养法鉴别钩虫虫种。共调查5067人,钩虫感染率为9.0%(457/5067),其中轻、中、重度感染者分别占94.5%(432/457)、2.8%(13/457)和2.6%(12/457)。对160例钩虫感染者进行钩虫虫种鉴别,其中感染美洲钩虫139例,感染十二指肠钩虫16例,混合感染5例。男性和女性钩虫感染率分别为8.4%(204/2422)、9.6%(253/2645),60岁及以上年龄组感染率最高(12.9%),民族以独龙族的感染率最高(39.6%),职业以农民感染率最高(9.4%),文化程度以小学人群感染率最高(9.5%)。滇桂粤南部生态区感染率最高(17.1%),其中河口县人体钩虫感染率高达30.6%。高、中、低经济水平地区感染率分别为0.8%(6/759)、13.6%(311/2287)和6.9%(140/2021),差异有统计学意义(P<0.01)。云南省部分地区人体钩虫感染率仍然较高,应继续加强对农民、老年人和直过少数民族等重点人群的防治工作。

关键词：钩虫感染调查云南省