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Relative importance of spatial processes and environmental factors in shaping alpine meadow communities

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Journal of Plant Ecology 2011年第4期4卷 249-258页

作者： qi Li Xue Yang Janne Soininen Cheng-Jin Chu jie-qi zhang Kai-Liang Yu Gang Wang MOE Key Laboratory of Arid and Grassland Ecology Lanzhou UniversityLanzhou 730000China Department of Environmental Sciences University of HelsinkiHelsinkiPO Box 65FI 00014Finland

Spatial processes and environmental control are the two distinct,yet not mutually exclusive forces of community structuring,but the relative importance of these factors is controversial due to the speciesspecific dispersal ability,sensitivity towards environmental variables,organism’s abundance and the effect of spatial *** the present paper,we explored spatial versus environmental control in shaping community composition(i.e.b-diversity)and species turnover(*** of b-diversity)at an alpine meadow along a slope aspect gradient on the qinghai–Tibetan Plateau at different spatial scales of sampling(quadrats and plots),by taking account of seed dispersal mode and *** We examined the relative importance of spatial processes and environmental factors using all species and four additional subsets of selected ***,we attempted to explore the effect of scale(quadrat refers to scale of;0.3 m and plot of;8 m)on their counter *** data were analyzed both by variation partitioning and multiple regressions on distance *** spatial structure was modelled using Moran’s eigenvector maps(MEM).Important Findings Both spatial processes and environmental factors were important determinants of the community composition and species *** community composition in the alpine meadow was controlled by spatially structured environment(17.6%),space independent of environment(18.0%)and a negligible effect of environment independent of space(4.4%)at the scale of *** three components contributed 21.8,9.9 and 13.9%,respectively,at the scale of *** balance between the forces at different spatial scales drove community structures along the slope aspect *** importance of environmental factors on b-diversity at alpine meadow increased with scale while that of spatial processes decreased or kept steady,depending on dispersal mode and abundance of species comprising the *** the‘pure’effect of spatial processes on

关键词： alpine meadow dispersal environmental factor slope aspect spatial process spatial scale

Outcome of a session of extracorporeal shock wave lithotripsy before endoscopic retrograde cholangiopancreatography for problematic and large common bile duct stones

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World Journal of Gastroenterology 2017年第27期23卷 4950-4957页

作者： Tao Tao Ming zhang qi-jie zhang Liang Li Tao Li Xiao Zhu Ming-Dong Li Gui-Hua Li Shu-Xia Sun Department of Gastroenterology Zibo Central Hospital Department of Rehabilitation Zibo Central Hospital Department of General Surgery(Breast and Thyroid Surgery) Zibo Central Hospital Department of Orthopedics(Spinal Surgery) Zibo Central Hospital Guangdong Province Key Laboratory of Medical Molecular Diagnosis Guangdong Medical College Department of Gynecology Zibo Central Hospital

AIM To compare the efficacy of a session of extracorporeal shock wave lithotripsy(ESWL) before endoscopic retrograde cholangiopancreatography(ERCP) vs ERCP only for problematic and large common bile duct(CBD) *** Adult patients with CBD stones for whom initial ERCP was unsuccessful because of the large size of CBD stones were identified. The patients were randomized into two groups,an "ESWL + ERCP group" and an "ERCP-only" group. For ESWL + ERCP cases,ESWL was performed prior to ERCP. Clearance of the CBD,complications related to the ESWL/ERCP procedure,frequency of mechanical lithotripsy use and duration of the ERCP procedure were evaluated in both *** There was no significant difference in baseline characteristics between the two groups. A session of ESWL before ERCP compared with ERCP only resulted in similar outcomes in terms of successful stone removal within the first treatment session(74.2% vs 71.0%,P = 0.135),but a higher clearance rate within the second treatment session(84.4% vs 51.6%,P = 0.018) and total stone clearance(96.0% vs 86.0%,P = 0.029). Moreover,ESWL prior to ERCP not only reduced ERCP procedure time(43 ± 21 min vs 59 ± 28 min,P = 0.034) and the rate of mechanical lithotripsy use(20% vs 30%,P = 0.025),but also raised the clearance rate of extremely large stones(80.0% vs 40.0%,P = 0.016). Post-ERCP complications were similar for the two *** Based on the higher rate of successful stone removal and minimal complications,ESWL prior to ERCP appears to be a safe and effective treatment for the endoscopic removal of problematic and large CBD stones.

关键词： Extracorporeal shock wave lithotripsy Endoscopic retrograde cholangiopancreatography Common bile duct stones

Prostate-derived IL-1βupregulates expression of NMDA receptor in the paraventricular nucleus and shortens ejaculation latency in rats with experimental autoimmune prostatitis

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Asian Journal of Andrology 2022年第2期24卷 213-218页

作者： jie Yang Jiao-Chen Luan Jian-Huai Chen qi-jie zhang Jian-Xin Xue Ya-Min Wang Guo-qing Zhu Ning-Hong Song Zeng-Jun Wang Jia-Dong Xia Department of Urology First Affiliated Hospital of Nanjing Medical UniversityNanjing 210008China Department of Andrology Jiangsu Province Hospital of Chinese MedicineAffiliated Hospital of Nanjing University of Chinese MedicineNanjing 210008China Key Laboratory of Cardiovascular Disease and Molecular Intervention Department of PhysiologyNanjing Medical UniversityNanjing 210008China

Experimental autoimmune prostatitis(EAP)-induced persistent inflammatory immune response can significantly upregulate the expression of N-methyl-D-aspartic acid(NMDA)receptors in the paraventricular nucleus(PVN).However,the mechanism has not yet been ***,we screened out the target prostate-derived inflammation cytokines(PDICs)by comparing the inflammatory cytokine levels in peripheral blood and cerebrospinal fluid(CSF)between EAP rats and their *** identifying the target PDIC,qualified males in initial copulatory behavior testing(CBT)were subjected to implanting tubes onto bilateral ***,they were randomly divided into four subgroups(EAP-1,EAP-2,Control-1,and Control-2).After 1-week recovery,EAP-1 rats were microinjected with the target PDIC inhibitor,Control-1 rats were microinjected with the target PDIC,while the EAP-2 and Control-2 subgroups were only treated with the same amount of artificial CSF(aCSF).Results showed that only interleukin-1β(IL-1β)had significantly increased mRNA-expression in the prostate of EAP rats compared to the controls(P<0.001)and significantly higher protein concentrations in both the serum(P=0.001)and CSF(P<0.001)of the EAP groups compared to the Control ***,IL-1βwas identified as the target PDIC which crosses the blood-brain barrier,thereby influencing the central nervous ***,the EAP-1 subgroup displayed a gradually prolonged ejaculation latency(EL)in the last three CBTs(all P<0.01)and a significantly lower expression of NMDA NR1 subunit in the PVN(P=0.043)compared to the respective control groups after a 10-day central administration of IL-1β***,the Control-1 subgroup showed a gradually shortened EL(P<0.01)and a significantly higher NR1 expression(P=0.004)after homochronous IL-1β***,we identified IL-1βas the primary PDIC which shortens EL in EAP ***,further studies should be conducted to elucidate the specific molecular mechanisms throug

关键词： chronic prostatitis N-methyl-D-aspartic acid receptor paraventricular nucleus premature ejaculation prostate-derived inflammation cytokines sympathetic nervous system

Losartan improves erectile function through suppression of corporal apoptosis and oxidative stress in rats with cavernous nerve injury

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Asian Journal of Andrology 2019年第5期21卷 452-459页

作者： Yi Wang Xiang-Hu Meng qi-jie zhang Ya-Min Wang Chen Chen Yi-Chun Wang Xiang Zhou Cheng-Jian Ji Ning-Hong Song Department of Urology The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China

This study aimed to investigate the functional and morphological changes in the corpus cavernosum after cavernous nerve(CN)injury or neurectomy and then reveal whether treatment with the angiotensin II Type 1 receptor antagonist losartan would improve erectile function as well as its potential mechanisms.A total of 48 10-week-old Sprague-Dawley male rats,weighing 300-350 g,were randomly divided into the following four groups(n=12 per group):sham operation(Sham)group,bilateral cavernous nerve injury(BOND group,losartaretreated BCNI(BCNI+Losartan)group,and bilateral cavernous neurectomy(Neurectomy)*** was administered once daily by oral gavage at a dose of 30 mg kg^-1 day^-1 for 4 weeks starting on the day of *** BCNI and the Neurectomy groups exhibited decreases in erectile response and increases in apoptosis and oxidative stress,compared with the Sham *** with losartan could have a modest effect on erectile function and significantly prevent corporal apoptosis and oxidative stress?The phospho-B-cell lymphoma 2(Bcl-2)-associated death promoter(p-Bad)/Bad and phospho-the protein kinase B(p-AKT)/AKT ratios were substantially lower,while the Bcl-2-associated X protein(Bax)/Bcl-2 ratio,nuclear factor erythroid 2-related factor 2(Nrf2)/Kelch-like ECH-associated protein 1(Keap-1),transforming growth factor-p 1(TGF-pi)and heme oxygenase-1(HO-1)levels,and caspase-3 activity were higher in the BCNI and Neurectomy groups than in the Sham *** 4 weeks of daily administration with losartan,these expression levels were remarkably attenuated compared with the BCNI *** together,our results suggested that early administration of losartan after CN injury could slightly improve erectile function and significantly reduce corporal apoptosis and oxidative stress by inhibiting the Akt/Bad/Bax/caspase-3 and Nrf2/Keap-1 pathways.

关键词： angiotensin II apoptosis erectile dysfunction fibrosis losartan oxidative stress

Mitochondrial DNA Haplogroups and the Risk of Sporadic Parkinson＇s Disease in Han Chinese

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Chinese Medical Journal 2015年第13期128卷 1748-1754页

作者： Ya-Fang Chen Wan-Jin Chen Xiao-Zhen Lin qi-jie zhang Jiang-Ping Cai Chia-Wei Liou Ning Wang Department of Neurology and Institute of Neurology First Affiliated Hospital Fujian Medical University Fuzhou Fujian 350005 China Fujian Key Laboratory of Molecular Neurology Fuzhou Fujian 350005 China Department of Neurology Mitochondrial Research Unit Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine Kaohsiung Taiwan China

Background： Mitochondrial dysflmction is linked to the pathogenesis of Parkinson＇s disease （PD）. However, the precise role of mitochondrial DNA （mtDNA） variations is obscure. On the other hand, mtDNA haplogroups have been inconsistently reported to modify the risk of PD among differeni population. Here, we try to explore the relationship between mtDNA haplogroups and sporadic PD in a Han Chinese population. Methods： Nine single-nucleotide polymorphisms, which define the major Asian mtDNA haplogroups （A, B, C, D, F, G）, were detected via polymerase chain reaction-restriction fragment length polymorphism or denaturing polyacrylamide gel electrophoresis in 279 sporadic PD patients and 510 matched controls of Hart population. Results： Overall, the distribution ofmtDNA haplogroups did not show any significant differences between patients and controls. However, alter stratification by age at onset, the frequency of haplogroup B was significantly lower in patients with early-onset PD （EOPD） compared to the controls （odds ratio [OR] =0.225, 95% confidence interval [CI]： 0.082-0.619, P 0.004）, while other haplogroups did not show significant differences. Alter stratification by age at examination, among subjects younger than 50 years of age： Haplogroup B also showed a lower frequency in PD cases （OR = 0. 146, 95% CI： 0.030-0.715~ P = 0.018） while haplogroup D presented a higher risk of PD （OR - 3.579, 95% CI： 1. 112-11.523, P = 0.033）, other haplogroups also did not show significant differences in the group. Conclusions： Our study indicates that haplogroup B might confer a lower risk for EOPD and people younger than 50 years in Han Chinese, while haplogroup D probably lead a higher risk of PD in people younger than 50 years of age. In brief particular Asian mtDNA haplogroups likely play a role in the pathogenesis of PD among Hart Chinese.

关键词： l-tan Chinese Haplogroups Mitochondrial DNA Parkinson's Disease

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基于局部正脸合成和两阶段表示的三阶段人脸识别算法

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北京理工大学学报 2017年第6期37卷 637-643页

作者：赵清杰齐惠张雨王浩北京理工大学计算机学院智能信息技术北京市重点实验室北京100081

基于两阶段表示的人脸识别算法(TPTSR)识别率高,并且对遮挡、噪声等干扰鲁棒,但是当人脸姿态有较大变化时,TPTSR算法的识别率会明显下降.针对这一问题,提出基于局部正脸合成和TPTSR的三阶段人脸识别算法:第一个阶段,正脸合成阶段,利用... 详细信息

基于两阶段表示的人脸识别算法(TPTSR)识别率高,并且对遮挡、噪声等干扰鲁棒,但是当人脸姿态有较大变化时,TPTSR算法的识别率会明显下降.针对这一问题,提出基于局部正脸合成和TPTSR的三阶段人脸识别算法:第一个阶段,正脸合成阶段,利用提出的正脸合成算法和视点库,将偏转角度较大的测试样本合成相应的正脸,作为新的测试样本;第二个阶段,样本筛选阶段,选择出对最新的测试样本最具表示能力的M个训练样本;第三个阶段,决策识别阶段,用这M个训练样本做人脸识别.通过与经典算法的对比实验证明,提出的3PTSR人脸识别算法能有效解决多姿态人脸识别问题.

关键词：人脸识别正脸合成稀疏表示

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Practical approach for detecting k-nonseparability of multipartite quantum states

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 32-48页

作者： jie Guo Jinchuan Hou Xiaofei qi Kan He College of Mathematics Taiyuan University of Technology School of Mathematics and Statistics Shanxi University Key Laboratory of Complex Systems and Data Science of Ministry of Education Shanxi University

The instantaneous detection of entanglement in quantum states poses a significant challenge in the fields of quantum computation and quantum information, and there are no practical methods or tools to complete this task satisfactorily so far. We propose a sufficient and necessary criterion of k-nonseparability for any n-partite finite or infinite dimensional systems, 2 ≤ k ≤ n. This criterion serves as the foundation for a practical scheme designed to detect entanglement and k-nonseparability across multipartite finite-dimensional systems. To exemplify the application of our scheme, we have developed a software tool that facilitates swift and precise identification of entanglement, k-nonseparability, and genuine entanglement within n-qubit systems, specifically tailored for systems with 2 ≤ n ≤ 4.

关键词： multipartite systems entanglement states entanglement witnesses ${\bm~k}$-nonseparability

Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

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Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming zhang Hanyu Wu qi Chen Jiaxin Yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

Dynamic behaviors of graphene platelets-reinforced metal foam piezoelectric beams with velocity feedback control

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 63-80页

作者： jie CHEN Xinyue zhang Mingyang FAN School of Mathematics Statistics and Mechanics Beijing University of Technology College of Mechanical & Energy Engineering Beijing University of Technology

Graphene platelets(GPLs)-reinforced metal foam structures enhance the mechanical properties while maintaining the lightweight characteristics of metal foams. Further bonding piezoelectric actuator and sensor layers on the surfaces of GPLs-reinforced metal foam beams enables active vibration control, greatly expanding their applications in the aerospace industry. For the first time, this paper investigates the vibration characteristics and active vibration control of GPLs-reinforced metal foam beams with surfacebonded piezoelectric layers. The constant velocity feedback scheme is used to design the closed-loop controller including piezoelectric actuators and sensors. The effects of the GPLs on the linear and nonlinear free vibrations of the beams are numerically *** Newmark-β method combined with Newton's iteration technique is used to calculate the nonlinear responses of the beams under different load forms including harmonic loads,impact loads, and moving loads. Additionally, special attention is given to the vibration reduction performance of the velocity feedback control on the responses of the beam.

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