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Flow-Induced Instabilities in Pump-Turbines in China

Zhigang Zuo,Shuhong Liu

Engineering 2017, Volume 3, Issue 4,   Pages 504-511 doi: 10.1016/J.ENG.2017.04.010

Abstract:

The stability of pump-turbines is of great importance to the operation of pumped storage power (PSP) stations. Both hydraulic instabilities and operational instabilities have been reported in PSP stations in China. In order to provide a reference to the engineers and scientists working on pump-turbines, this paper summarizes the hydraulic instabilities and performance characteristics that promote the operational instabilities encountered in pump-turbine operations in China. Definitions, analytical methods, numerical and experimental studies, and main results are clarified. Precautions and countermeasures are also provided based on a literature review. The gaps between present studies and the need for engineering practice are pointed out.

Keywords： Pump-turbines     Flow-induced instability     Pressure fluctuations     S-shaped characteristics     Positive slopes    

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Stability analysis of slopes with planar failure using variational calculus and numerical methods

Norly BELANDRIA, Roberto ÚCAR, Francisco M. LEÓN, Ferri HASSANI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1262-1273 doi: 10.1007/s11709-020-0657-9

Abstract: Sub-routines are important because they can be applied in slopes with different geometry, surcharge,

Keywords： slopes stability     planar failure     variational calculus     numerical methods    

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Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 378-387 doi: 10.1007/s11709-022-0808-2

Abstract: This study presents stability analyses of layered soil slopes in unsaturated conditions and uses a limitanalyses are conducted to explore the influences of the matric suction on the stability of layered soil slopesshow that larger suction stress provided in unsaturated clay dominates the stability of the layered slopesInfiltration/evaporation can obviously affect the stability of unsaturated layered slopes, but their

Keywords： slope stability     suction stress     unsaturated soil     layered slope     limit equilibrium    

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Evaluation of the stability of terraced slopes in clayey gravel soil using a novel numerical technique

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 796-811 doi: 10.1007/s11709-023-0922-9

Abstract: After validating the proposed technique, it was employed to investigate the performance of terraced slopes

Keywords： terraced slope     safety factor     finite element method     ABAQUS     extended Cam–clay    

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Triage for management of cervical high-grade squamous intraepithelial lesion patients with positive margin

Yuya Dou, Xiaodan Zhang, Yang Li, Fenfen Wang, Xing Xie, Xinyu Wang

Frontiers of Medicine 2017, Volume 11, Issue 2,   Pages 223-228 doi: 10.1007/s11684-017-0517-8

Abstract: triage for the management of cervical high-grade squamous intraepithelial lesion (HSIL) patients with positiveClinico-pathological data of HSIL patients with positive margin by conization were retrospectively collectedNearly half of HSIL patients with positive margin by conization were disease-free in subsequent surgicalspecimens, and those with multiple positive margins may consider re-conization or re-assessment.

Keywords： cervical high-grade squamous intraepithelial lesion     conization     positive surgical margin     hysterectomy    

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Seismic stability of earth slopes with tension crack

Yundong ZHOU, Fei ZHANG, Jingquan Wang, Yufeng GAO, Guangyu DAI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 950-964 doi: 10.1007/s11709-019-0529-3

Abstract: Cracks at the crest of slopes frequently occur during earthquakes.Developed is a closed-form to assess the seismic stability of slopes with zero tensile strength.indicate that the presence of the tension crack has significant effects on the seismic stability of slopesin seismic slope analysis may lead to overestimation on the stability, as much as 50% for vertical slopesresults in transit of the critical failure mode to a straight line from a log-spiral, except for flat slopes

Keywords： slope stability     tension     crack     limit equilibrium     seismic effect    

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NO conversion by positive streamer discharge—effects of gas compositions and reaction conditions

HE Wei, ZHU Tianle, LI Jing

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 153-158 doi: 10.1007/s11783-007-0027-z

Abstract: The effects of gas compositions and reaction conditions on NO conversion by positive streamer discharge

Keywords： conversion     streamer discharge     wheel-cylinder     positive streamer    

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To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Strategic Study of CAE 2007, Volume 9, Issue 2,   Pages 5-11

Abstract: proposition, definition, classification and characteristic of biological economy, also, the importance of positiveIt also discusses which views of happiness should be recommended and how to practice a positive view

Keywords： biological economy     happiness     positive view of happiness    

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Prognostic value of the 21-gene recurrence score in ER-positive, HER2-negative, node-positive breast

Jiayi Wu, Weiqi Gao, Xiaosong Chen, Chunxiao Fei, Lin Lin, Weiguo Chen, Ou Huang, Siji Zhu, Jianrong He, Yafen Li, Li Zhu, Kunwei Shen

Frontiers of Medicine 2021, Volume 15, Issue 4,   Pages 621-628 doi: 10.1007/s11684-020-0738-0

Abstract: significance of the 21-gene recurrence score (RS) in Chinese patients with pN0-1, estrogen receptor-positive

Keywords： early breast cancer     21-gene assay     recurrence score     prognosis    

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Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions: finding of

Zhan Su, Fengyu Wu, Weiyu Hu, Xiaodan Liu, Shaoling Wu, Xianqi Feng, Zhongguang Cui, Jie Yang, Zhenguang Wang, Hongzai Guan, Hongguo Zhao, Wei Wang, Chunting Zhao, Jun Peng

Frontiers of Medicine 2017, Volume 11, Issue 3,   Pages 440-444 doi: 10.1007/s11684-017-0523-x

Abstract:

Philadelphia chromosome-positive acute myeloid leukemia is controversial and difficult to distinguishand BCR-ABL1 fusion gene together with complex chromosome abnormalities, a diagnosis of Philadelphia-positive

Keywords： Philadelphia chromosome     acute myeloid leukemia     mass     osteolysis     positron emission tomography    

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EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Frontiers of Agricultural Science and Engineering   Pages 285-295 doi: 10.15302/J-FASE-2022469

Abstract:

● Transport stress declined the level of leukocytes including lymphocytes in rat serum.

Keywords： intestine     nNOS     nNOS-positive neurons     transport stress    

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of imatinib plus CALLG2008 protocol in adult patients with newly diagnosed Philadelphia chromosome-positive

Yinjun Lou, Yafang Ma, Chenyin Li, Sansan Suo, Hongyan Tong, Wenbin Qian, Wenyuan Mai, Haitao Meng, Wenjuan Yu, Liping Mao, Juyin Wei, Weilei Xu, Jie Jin

Frontiers of Medicine 2017, Volume 11, Issue 2,   Pages 229-238 doi: 10.1007/s11684-017-0506-y

Abstract: We retrospectively analyzed 153 newly diagnosed adult patients with Philadelphia chromosome (Ph)-positiveAll these results suggested that imatinib plus CALLG2008 was an effective protocol for Ph-positive ALL

Keywords： Philadelphia chromosome     acute lymphoblastic leukemia     imatinib     CALLG2008    

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Overcoming resistance to endocrine therapy in hormone receptor-positive human epidermal growth factor

Wenjie Zhu, Binghe Xu

Frontiers of Medicine 2021, Volume 15, Issue 2,   Pages 208-220 doi: 10.1007/s11684-020-0795-4

Abstract: New targeted therapies have been developed to overcome resistance to endocrine therapy (ET) and improve the outcome of HR /HER2 advanced breast cancer (ABC). We conducted a meta-analysis and systemic review on randomized controlled trials evaluating various targeted therapies in combination with ET in HR /HER2 ABC. PUBMED and EMBASE databases were searched for eligible trials. Hazard ratios (HRs) for progression-free survival (PFS), odds ratios (ORs) for objective response rate (ORR), clinical benefit rate (CBR), and toxicity were meta-analyzed. Twenty-six studies with data on 10 347 patients were included and pooled. The addition of cyclin-dependent kinase 4/6 inhibitors to ET significantly improved median PFS (pooled HR= 0.547, <0.001), overall survival (pooled HR= 0.755, <0.001), and tumor response rates (ORR, pooled OR= 1.478, <0.001; CBR, pooled OR= 1.201, <0.001) with manageable toxicities (pooled OR= 3.280, <0.001). The mammalian targets of rapamycin inhibitors and exemestane were not clinically beneficial for this pooled population including ET-naïve and ET-resistant patients. Moderate improvement in PFS (pooled HR= 0.686, <0.001) yet pronounced toxicities (pooled OR= 2.154, <0.001) were noted in the combination of phosphatidylinositol-4,5-bisphosphate 3-kinase inhibitors with fulvestrant. Future studies are warranted to optimize the population and the dosing sequence of these available options.

Keywords： endocrine-resistant     HR+/HER2- advanced breast cancer     randomized clinical trials     meta-analysis     targeted therapy    

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N-Positive ion activated rapid addition and mitochondrial targeting ratiometric fluorescent probes

Yan Shi, Fangjun Huo, Yongkang Yue, Caixia Yin

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 64-71 doi: 10.1007/s11705-021-2048-8

Abstract: Heterocyclic compound quinoline and its derivatives exist in natural compounds and have a broad spectrum of biological activity. They play an important role in the design of new structural entities for medical applications. Similarly, indoles and their derivatives are found widely in nature. Amino acids, alkaloids and auxin are all derivatives of indoles, as are dyes, and their condensation with aldehydes makes it easy to construct reaction sites for nucleophilic addition agents. In this work, we combine these two groups organically to construct a rapid response site (within 30 s) for H S, and at the same time, a ratiometric fluorescence response is presented throughout the process of H S detection. As such, the lower detection limit can reach 55.7 nmol/L for H S. In addition, cell imaging shows that this probe can be used for the mitochondrial targeted detection of endogenous and exogenous H S. Finally, this probe application was verified by imaging H S in nude mice.

Keywords： heterocyclic compound     hydrogen sulfide     ratiometric     mitochondrial targeted    

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Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 399-409 doi: 10.1007/s11705-020-1934-9

Abstract: local fluid velocities taking place in a rectangular channel electrochemical flow cell used as the positive

Keywords： CFD simulation     porous media     porous electrode     pressure drop     redox flow battery    

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Title Author Date Type Operation

Flow-Induced Instabilities in Pump-Turbines in China

Zhigang Zuo,Shuhong Liu

Journal Article

Stability analysis of slopes with planar failure using variational calculus and numerical methods

Norly BELANDRIA, Roberto ÚCAR, Francisco M. LEÓN, Ferri HASSANI

Journal Article

Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Journal Article

Evaluation of the stability of terraced slopes in clayey gravel soil using a novel numerical technique

Journal Article

Triage for management of cervical high-grade squamous intraepithelial lesion patients with positive margin

Yuya Dou, Xiaodan Zhang, Yang Li, Fenfen Wang, Xing Xie, Xinyu Wang

Journal Article

Seismic stability of earth slopes with tension crack

Yundong ZHOU, Fei ZHANG, Jingquan Wang, Yufeng GAO, Guangyu DAI

Journal Article

NO conversion by positive streamer discharge—effects of gas compositions and reaction conditions

HE Wei, ZHU Tianle, LI Jing

Journal Article

To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Journal Article

Prognostic value of the 21-gene recurrence score in ER-positive, HER2-negative, node-positive breast

Jiayi Wu, Weiqi Gao, Xiaosong Chen, Chunxiao Fei, Lin Lin, Weiguo Chen, Ou Huang, Siji Zhu, Jianrong He, Yafen Li, Li Zhu, Kunwei Shen

Journal Article

Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions: finding of

Zhan Su, Fengyu Wu, Weiyu Hu, Xiaodan Liu, Shaoling Wu, Xianqi Feng, Zhongguang Cui, Jie Yang, Zhenguang Wang, Hongzai Guan, Hongguo Zhao, Wei Wang, Chunting Zhao, Jun Peng

Journal Article

EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Journal Article

of imatinib plus CALLG2008 protocol in adult patients with newly diagnosed Philadelphia chromosome-positive

Yinjun Lou, Yafang Ma, Chenyin Li, Sansan Suo, Hongyan Tong, Wenbin Qian, Wenyuan Mai, Haitao Meng, Wenjuan Yu, Liping Mao, Juyin Wei, Weilei Xu, Jie Jin

Journal Article

Overcoming resistance to endocrine therapy in hormone receptor-positive human epidermal growth factor

Wenjie Zhu, Binghe Xu

Journal Article

N-Positive ion activated rapid addition and mitochondrial targeting ratiometric fluorescent probes

Yan Shi, Fangjun Huo, Yongkang Yue, Caixia Yin

Journal Article

Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Journal Article