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Chinese herbal medicine for the treatment of endocrine therapyrelated osteoporosis among patients with breast cancer:A systematic review and meta-analysis
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作者 Xiaomin Quan Hongyang Chen +6 位作者 Wenyi Wang Yu Gao Xingyue Zhi Xun Li Guanhu Yang Donggui Wan chao an 《Journal of Traditional Chinese Medical Sciences》 CAS 2024年第2期148-164,共17页
Objective:To assess the efficacy and safety of combining traditional Chinese medicine(TCM),specifically Chinese herbal medicine(CHM),with Western medicine(WM),compared to WM alone to treat breast cancer endocrine ther... Objective:To assess the efficacy and safety of combining traditional Chinese medicine(TCM),specifically Chinese herbal medicine(CHM),with Western medicine(WM),compared to WM alone to treat breast cancer endocrine therapy-related osteoporosis(BCET-OP)by meta-analysis.Methods:Thirty-eight randomized controlled trials involving 2170 participants were analyzed.Eight databases were searched for articles published between inception and December 2023.Quality assessment was performed using the Risk of Bias 2 tool.Results:Significant increases were observed in the TCM-WM group in lumbar vertebrae bone mineral density(BMD)(P<.001,mean difference(MD)=0.07,95%confidence interval(CI):0.06 to 0.08),lumbar vertebrae T-score(P=.0005,MD=0.21,95%CI:0.09 to 0.33)and collum femoris BMD(P=.01,MD=0.10,95%CI:0.02 to 0.19).No significant difference was observed between the groups in the collum femoris T-score and estradiol levels.Bone gla-protein levels were significantly increased in the TCM-WM group(P=.0002,MD=0.52,95%CI:0.25 to 0.79).Beta-CrossLaps decreased significantly in the TCM-WM group(P=.0008,MD=−0.10,95%CI:−0.16 to−0.04).No significant difference was observed between the TCM-WM and WM groups in alkaline phosphatase,in procollagen type I N-terminal propeptide,and in the Kupperman index.The visual analog score(VAS)was decreased in the TCM-WM group compared to the WM group(P<.001,MD=−1.40,95%CI:−1.94 to−0.87).No significant difference in adverse events was observed between the two groups.Conclusion:Combining CHM with WM in patients with BCET-OP significantly improved BMD,T-score,and certain bone turnover markers and reduced the VAS score,indicating potential benefits for bone health and related pain.Adverse event analysis revealed no differences between the groups,supporting the feasibility of the combination therapy.However,further research,particularly in diverse populations,is required. 展开更多
关键词 Breast cancer Endocrine therapy OSTEOPOROSIS Traditional Chinese medicine META-ANALYSIS
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Camrelizumab,apatinib and hepatic artery infusion chemotherapy combined with microwave ablation for advanced hepatocellular carcinoma
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作者 Meng-Xuan Zuo chao an +5 位作者 Yu-Zhe Cao Jia-Yu Pan Lu-Ping Xie Xin-Jing Yang Wang Li Pei-Hong Wu 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第8期3481-3495,共15页
BACKGROUND Hepatic arterial infusion chemotherapy and camrelizumab plus apatinib(TRIPLET protocol)is promising for advanced hepatocellular carcinoma(Ad-HCC).However,the usefulness of microwave ablation(MWA)after TRIPL... BACKGROUND Hepatic arterial infusion chemotherapy and camrelizumab plus apatinib(TRIPLET protocol)is promising for advanced hepatocellular carcinoma(Ad-HCC).However,the usefulness of microwave ablation(MWA)after TRIPLET is still controversial.AIM To compare the efficacy and safety of TRIPLET alone(T-A)vs TRIPLET-MWA(TM)for Ad-HCC.METHODS From January 2018 to March 2022,217 Ad-HCC patients were retrospectively enrolled.Among them,122 were included in the T-A group,and 95 were included in the T-M group.A propensity score matching(PSM)was applied to balance bias.Overall survival(OS)was compared using the Kaplan-Meier curve with the log-rank test.The overall objective response rate(ORR)and major complications were also assessed.RESULTS After PSM,82 patients were included both the T-A group and the T-M group.The ORR(85.4%)in the T-M group was significantly higher than that(65.9%)in the T-A group(P<0.001).The cumulative 1-,2-,and 3-year OS rates were 98.7%,93.4%,and 82.0%in the T-M group and 85.1%,63.1%,and 55.0%in the T-A group(hazard ratio=0.22;95%confidence interval:0.10-0.49;P<0.001).The incidence of major complications was 4.9%(6/122)in the T-A group and 5.3%(5/95)in the T-M group,which were not significantly different(P=1.000).CONCLUSION T-M can provide better survival outcomes and comparable safety for Ad-HCC than T-A. 展开更多
关键词 Hepatic arterial infusion chemotherapy Hepatocellular carcinoma Molecular targeting agent Programmed cell death protein 1 inhibitors Microwave ablation
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Artificial intelligence model of complicated flow behaviors for Ti-13Nb-13Zr alloy and relevant applications 被引量:3
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作者 Ze-yan SHI Guo-zheng QUan +3 位作者 chao an Hui-min QIU Wei-yong WanG Zhi-hua ZHanG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第10期2090-2098,共9页
The comprehensive nonlinear flow behaviors of a ductile alloy play a significant role in the numerical analysis of its forming process. The accurate characterization of as-forged Ti-13 Nb-13 Zr alloy was conducted by ... The comprehensive nonlinear flow behaviors of a ductile alloy play a significant role in the numerical analysis of its forming process. The accurate characterization of as-forged Ti-13 Nb-13 Zr alloy was conducted by an improved intelligent algorithm, GA-SVR, the combination of genetic algorithm(GA) and support vector regression(SVR). The GA-SVR model learns from a training dataset and then is verified by a test dataset. As for the generalization ability of the solved GA-SVR model, no matter in β phase temperature range or(α+β) phase temperature range, the correlation coefficient R-values are always larger than 0.9999, and the AARE-values are always lower than 0.18%. The solved GA-SVR model accurately tracks the highly-nonlinear flow behaviors of Ti-13 Nb-13 Zr alloy. The stress-strain data expanded by this model are input into finite element solver, and the computation accuracy is improved. 展开更多
关键词 Ti-13Nb-13Zr alloy flow stress constitutive model support vector regression genetic algorithm
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Grain refining of Er added to Ti-22Al-25Nb alloy and morphology of erbium precipitates 被引量:3
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作者 Jing-Ru Dai Hui-Min Lu +1 位作者 Zhi-Jin Cai chao an 《Rare Metals》 SCIE EI CAS CSCD 2013年第1期5-11,共7页
In order to investigate the effect of erbium (Er) on the microstructure of orthorhombic Ti2A1Nb-based alloys, four testing alloys were prepared by adding differ- ent contents of the rare earth metal Er to Ti-22A1-25... In order to investigate the effect of erbium (Er) on the microstructure of orthorhombic Ti2A1Nb-based alloys, four testing alloys were prepared by adding differ- ent contents of the rare earth metal Er to Ti-22A1-25Nb alloy and optical microscopy, X-ray diffraction, scanning electron microscopy, electron probe microanalysis, energy- dispersive spectrometry, and transmission electron microscopy were used. The results show that the addition of Er is capable of grain refining and the refinement effect is more obvious with increasing content of Er. The Er203 dispersoids formed by internal oxidation and A13Er com- pound particles are observed in Er-doped alloys and the number of Er precipitates is increased with increasing Er addition. It is likely that the solubility of Er in the Ti2A1Nb alloy is very low and Er precipitates tend to segregate at grain boundaries, which together with the surface activity of rare earth elements is supposed to decrease the prior B2 grain size of Ti-22A1-25Nb alloy effectively. 展开更多
关键词 Ti2A1Nb-based alloys Rare earth erbium(Er) Microstructure Erbium precipitates
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Inhibition of growth and metastasis of triple-negative breast cancer targeted by Traditional Chinese Medicine Tubeimu in orthotopic mice models 被引量:10
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作者 Jingxiao Wang Xinjie Yang +8 位作者 Haibo Han Limin Wang Weiqian Bao Shanshan Wang Robert M.Hoffman Meng Yang Hui Qi chao an Kaiwen Hu 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2018年第1期112-121,共10页
Objective: Triple-negative breast cancer(TNBC) is highly invasive and metastatic, which is in urgent need of transformative therapeutics. Tubeimu(TBM), the rhizome of Bolbostemma paniculatum(Maxim.) Franquet, i... Objective: Triple-negative breast cancer(TNBC) is highly invasive and metastatic, which is in urgent need of transformative therapeutics. Tubeimu(TBM), the rhizome of Bolbostemma paniculatum(Maxim.) Franquet, is one of the Chinese medicinal herbs used for breast diseases since the ancient times. The present study evaluated the efficacy, especially the anti-metastatic effects of the dichloromethane extract of Tubeimu(ETBM) on TNBC orthotopic mouse models and cell lines.Methods: We applied real-time imaging on florescent orthotopic TNBC mice model and tested cell migration and invasion abilities with MDA-MB-231 cell line. Digital gene expression sequencing was performed and Kyoto Encyclopedia of Genes and Genomes(KEGG) analysis applied to explore the pathways influenced by ETBM.Moreover, quantitative real-time polymerase chain reactions(q RT-PCR) and Western blot were delivered to confirm the gene expression changes.Results: ETBM exhibited noticeable control on tumor metastasis and growth of TNBC tumors with no obvious toxicity. In compliance with this, it also showed inhibition of cell migration and invasion in vitro. Its impact on the changed biological behavior in TNBC may be a result of decreased expression of integrin β1(ITGβ1), integrin β8(ITGβ8) and Rho GTPase activating protein 5(ARHGAP5), which disabled the focal adhesion pathway and caused change in cell morphology.Conclusions: This study reveals that ETBM has anti-metastatic effects on MDA-MB-231-GFP tumor and may lead to a new therapeutic agent for the integrative treatment of highly invasive TNBC. 展开更多
关键词 Tubeimu triple negative breast cancer(TNBC) orthotopic mouse models Traditional Chinese Medicine(TCM) integrins Rho GTPase activating protein 5
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Structural and electrical transport properties of Dirac-like semimetal PdSn4 under high pressure
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作者 Bowen Zhang chao an +5 位作者 Yonghui Zhou Xuliang Chen Ying Zhou Chunhua Chen Yifang Yuan Zhaorong Yang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第12期280-285,共6页
We conducted in-situ high-pressure synchrotron x-ray diffraction(XRD) and electrical transport measurements on Dirac-like semimetal Pd Sn4 in diamond anvil cells with quasi-hydrostatic pressure condition up to 44.5 GP... We conducted in-situ high-pressure synchrotron x-ray diffraction(XRD) and electrical transport measurements on Dirac-like semimetal Pd Sn4 in diamond anvil cells with quasi-hydrostatic pressure condition up to 44.5 GPa–52.0 GPa. The XRD data show that the ambient orthorhombic phase(Ccca) is stable with pressures to 44.5 GPa, and the lattice parameters and unit-cell volume decrease monotonously upon compression. The temperature dependence of the resistance exhibits a metallic conduction and follows a Fermi-liquid behavior below 50 K, both of which keep unchanged upon compression to 52.0 GPa. The magnetoresistance curve at 5 K maintains a linear feature in a magnetic field range of 2.5 T–7 T with increasing pressure to 20.0 GPa. Our results may provide pressure-transport constraints on the robustness of the Dirac fermions. 展开更多
关键词 high pressure Dirac-like semimetal crystal structure electrical transport
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Pressure-induced anomalous insulating behavior in frustrated iridate La_(3)Ir_(3)O_(11)
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作者 Chun-Hua Chen Yong-Hui Zhou +5 位作者 Ying Zhou Yi-Fang Yuan chao an Xu-Liang Chen Zhao-Ming Tian Zhao-Rong Yang 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第6期547-551,共5页
The geometrically frustrated iridate La_(3)Ir_(3)O_(11) with strong spin–orbit coupling and fractional valence was recently predicted to be a quantum spin liquid candidate at ambient conditions. Here, we systematical... The geometrically frustrated iridate La_(3)Ir_(3)O_(11) with strong spin–orbit coupling and fractional valence was recently predicted to be a quantum spin liquid candidate at ambient conditions. Here, we systematically investigate the evolution of structural and electronic properties of La_(3)Ir_(3)O_(11) under high pressure. Electrical transport measurements reveal an abnormal insulating behavior rather than metallization above a critical pressure P_(c) ~ 38.7 GPa. Synchrotron x-ray diffraction(XRD)experiments indicate the stability of the pristine cubic KSbO_(3)-type structure up to 73.1 GPa. Nevertheless, when the pressure gradually increases across P_(c), the bulk modulus gets enhanced and the pressure dependence of bond length d_(Ir-Ir) undergoes a slope change. Consistent with the XRD data, detailed analyses of Raman spectra reveal an abnormal redshift of Raman mode and a change of Raman intensity around P_(c). Our results demonstrate that the pressure-induced insulating behavior in La_(3)Ir_(3)O_(11) can be assigned to the structural modification, such as the distortion of IrO_6 octahedra. These findings will shed light on the emergent abnormal insulating behavior in other 5 d iridates reported recently. 展开更多
关键词 high pressure 5d iridates semimetal–insulator transition crystal structure
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Structural and electrical transport properties of charge density wave material LaAgSb_(2)under high pressure
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作者 Bowen Zhang chao an +7 位作者 Xuliang Chen Ying Zhou Yonghui Zhou Yifang Yuan Chunhua Chen Lili Zhang Xiaoping Yang Zhaorong Yang 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第7期407-412,共6页
Layered lanthanum silver antimonide LaAgSb_(2)exhibits both charge density wave(CDW)order and Dirac-cone-like band structure at ambient pressure.Here,we systematically investigate the pressure evolution of structural ... Layered lanthanum silver antimonide LaAgSb_(2)exhibits both charge density wave(CDW)order and Dirac-cone-like band structure at ambient pressure.Here,we systematically investigate the pressure evolution of structural and electronic properties of LaAgSb_(2)single crystal.We show that the CDW order is destabilized under compression,as evidenced by the gradual suppression of magnetoresistance.At P_(C)~22 GPa,synchrotron x-ray diffraction and Raman scattering measurements reveal a structural modification at room-temperature.Meanwhile,the sign change of the Hall coefficient is observed at 5 K.Our results demonstrate the tunability of CDW order in the pressurized LaAgSb_(2)single crystal,which can be helpful for its potential applications in the next-generation devices. 展开更多
关键词 high pressure charge density wave crystal structure electrical transport
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Pressure-Induced Metallization Accompanied by Elongated S–S Dimer in Charge Transfer Insulator NiS2
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作者 Hao Wu Yong-Hui Zhou +12 位作者 Yi-Fang Yuan Chun-Hua Chen Ying Zhou Bo-Wen Zhang Xu-Liang Chen Chuan-Chuan Gu chao an Shu-Yang Wang Meng-Yao Qi Ran-Ran Zhang Li-Li Zhang Xin-Jian Li Zhao-Rong Yang 《Chinese Physics Letters》 SCIE CAS CSCD 2019年第10期53-57,共5页
The insulator-metal transition triggered by pressure in charge transfer insulator NiS2 is investigated by combining high-pressure electrical transport,synchrotron x-ray diffraction and Raman spectroscopy measurements ... The insulator-metal transition triggered by pressure in charge transfer insulator NiS2 is investigated by combining high-pressure electrical transport,synchrotron x-ray diffraction and Raman spectroscopy measurements up to40-50 GPa.Upon compression,we show that the metallization firstly appears in the low temperature region at^3.2 GPa and then extends to room temperature at^8.0 GPa.During the insulator-metal transition,the bond length of S-S dimer extracted from the synchrotron x-ray diffraction increases with pressure,which is supported by the observation of abnormal red-shift of the Raman modes between 3.2 and 7.1 GPa.Considering the decreasing bonding-antibonding splitting due to the expansion of S-S dimer,the charge gap between the S-ppπ* band and the upper Hubbard band of Ni-3 d eg state is remarkabl.y decreased.These results consistently indicate that the elongated S-S dimer plays a predominant role in the insulator-metal transition under high pressure,even though the p-d hybridization is enhanced simultaneously,in accordance with a scenario of charge-gap-controlled type. 展开更多
关键词 NiS2 bonding charge
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Pressure-induced enhancement of optoelectronic properties in PtS2
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作者 Yi-Fang Yuan Zhi-Tao Zhang +9 位作者 Wei-Ke Wang Yong-Hui Zhou Xu-Liang Chen chao an Ran-Ran Zhang Ying Zhou Chuan-Chuan Gu Liang Li Xin-Jian Li Zhao-Rong Yang 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第6期345-349,共5页
PtS2, which is one of the group-10 transition metal dichalcogenides, attracts increasing attention due to its extraordinary properties under external modulations as predicted by theory, such as tunable bandgap and ind... PtS2, which is one of the group-10 transition metal dichalcogenides, attracts increasing attention due to its extraordinary properties under external modulations as predicted by theory, such as tunable bandgap and indirect-to-direct gap transition under strain; however, these properties have not been verified experimentally. Here we report the first experimental exploration of its optoelectronic properties under external pressure. We find that the photocurrent is weakly pressuredependent below 3 GPa but increases significantly in the pressure range of 3 GPa–4 GPa, with a maximum ~ 6 times higher than that at ambient pressure. X-ray diffraction data shows that no structural phase transition can be observed up to26.8 GPa, which indicates a stable lattice structure of PtS2 under high pressure. This is further supported by our Raman measurements with an observation of linear blue-shifts of the two Raman-active modes to 6.4 GPa. The pressure-enhanced photocurrent is related to the indirect-to-direct/quasi-direct bandgap transition under pressure, resembling the gap behavior under compression strain as predicted theoretically. 展开更多
关键词 high pressure optoelectronic properties transition metal disulfide
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Highly Aligned Graphene Aerogels for Multifunctional Composites 被引量:1
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作者 Ying Wu chao an +4 位作者 Yaru Guo Yangyang Zong Naisheng Jiang Qingbin Zheng Zhong‑Zhen Yu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第6期276-342,共67页
Stemming from the unique in-plane honeycomb lattice structure and the sp^(2)hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds,graphene exhibits remarkable anisotropic electrical,mechanical,an... Stemming from the unique in-plane honeycomb lattice structure and the sp^(2)hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds,graphene exhibits remarkable anisotropic electrical,mechanical,and thermal properties.To maximize the utilization of graphene’s in-plane properties,pre-constructed and aligned structures,such as oriented aerogels,films,and fibers,have been designed.The unique combination of aligned structure,high surface area,excellent electrical conductivity,mechanical stability,thermal conductivity,and porous nature of highly aligned graphene aerogels allows for tailored and enhanced performance in specific directions,enabling advancements in diverse fields.This review provides a comprehensive overview of recent advances in highly aligned graphene aerogels and their composites.It highlights the fabrication methods of aligned graphene aerogels and the optimization of alignment which can be estimated both qualitatively and quantitatively.The oriented scaffolds endow graphene aerogels and their composites with anisotropic properties,showing enhanced electrical,mechanical,and thermal properties along the alignment at the sacrifice of the perpendicular direction.This review showcases remarkable properties and applications of aligned graphene aerogels and their composites,such as their suitability for electronics,environmental applications,thermal management,and energy storage.Challenges and potential opportunities are proposed to offer new insights into prospects of this material. 展开更多
关键词 Highly aligned graphene aerogels Quantitative characterization of alignment Multifunctional composites Anisotropic properties Multifunctional applications
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中国农村低保精准识别的内在困境——贫困可见性与瞄准偏误及其解决思路 被引量:9
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作者 安超 《公共行政评论》 CSSCI 北大核心 2019年第6期125-142,201,202,共20页
甄别指标是基层干部认定低保对象的主要工具,它浓缩地反映了国家政策、地方变通、村庄知识之间的复杂互动,也集中体现了农村低保瞄准的内在困境。论文基于民政部政策研究中心2016年全国城乡困难家庭入户调查数据,通过回归分析实证考察... 甄别指标是基层干部认定低保对象的主要工具,它浓缩地反映了国家政策、地方变通、村庄知识之间的复杂互动,也集中体现了农村低保瞄准的内在困境。论文基于民政部政策研究中心2016年全国城乡困难家庭入户调查数据,通过回归分析实证考察了农村低保甄别指标与瞄准偏误之间的关系。结果表明:中央、地方、基层干部对甄别指标有着不同的理解,最终被采纳的指标通常是高度可见的;可见性指标能够有效预测和指示个案瞄准偏误,但欠缺稳定性,倾向以增加“漏出”风险为代价规避“过保”错误;相对于远离公共生活的群体,参加过村务监督的困难家庭被“漏出”的概率要低得多,表明了贫困人群融入社区公共事务对低保精准识别的重要性。 展开更多
关键词 农村低保 瞄准偏误 甄别指标 可见性
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Nomogram based on albumin-bilirubin grade to predict outcome of the patients with hepatitis C virus-related hepatocellular carcinoma after microwave ablation 被引量:4
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作者 chao an Xin Li +5 位作者 Xiaoling Yu Zhigang Cheng Zhiyu Han Fangyi Liu Jie Yu Ping Liang 《Cancer Biology & Medicine》 SCIE CAS CSCD 2019年第4期797-810,共14页
Objective:To construct a nomogram based on the albumin-bilirubin(ALBI)grade to provide prognostic value for hepatitis C virus(HCV)-related hepatocellular carcinoma(HCC)patients who underwent ultrasound-guided percutan... Objective:To construct a nomogram based on the albumin-bilirubin(ALBI)grade to provide prognostic value for hepatitis C virus(HCV)-related hepatocellular carcinoma(HCC)patients who underwent ultrasound-guided percutaneous microwave ablation(US-PMWA).Methods:From April 2005 to January 2018,183 treatment-naIve patients with 251 HCV-related HCCs according to the Milan criteria received US-PMWA subsequently.The overall survival(OS)and recurrence-free survival(RFS)were compared between groups classified by ALBI grade.Cox proportional hazard regression model based on risk factors for survival and recurrence was used to construct the nomogram.Results:The cumulative OS rates at 1-,3-,5-and 10-year were 97.7%,73.6%,54.5%and 34.5%,respectively.Stratified according to ALBI grade,the 1-,3-,and 5-year OS in the ALBI grade 1 group and grade 2 group were 99.2%,92.4%,77.9% and 97.7%,52.3%,38.6%,respectively,with significant statistical difference(P<0.001).No significant statistical difference was detected in the1-,3-,and 5-year RFS rates in the ALBI grade 1 group and grade 2 group(P=0.220).The major complication rate was 1.6%.Multivariate analysis results showed age,α-fetoprotein level,tumor number,platelet count,location,Child-Turcotte-Pugh(CTP)and ALBI grade were associated with OS,which generated the nomograms.Internal validation with 1000 bootstrapped sample sets had good concordance index of 0.769(95%CI 0.699-0.839)in OS.Conclusions:This nomogram based on ALBI grade was a visualization risk model,which could provide personalized prediction of long-term outcomes for HCV-related HCC patients after US-PMWA. 展开更多
关键词 NOMOGRAM albumin-bilirubin grade hepatitis C virus hepatocellular carcinoma microwave ablation
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Numerical Investigation of the Deposition Characteristics of Snow on the Bogie of a High-Speed Train 被引量:4
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作者 Lu Cai Zhen Lou +2 位作者 Nan Liu chao an Jiye Zhang 《Fluid Dynamics & Materials Processing》 EI 2020年第1期41-53,共13页
To investigate the deposition distribution of snow particles in the bogie surfaces of a high-speed train,a snow particle deposition model,based on the critical capture velocity and the critical shear velocity,was elab... To investigate the deposition distribution of snow particles in the bogie surfaces of a high-speed train,a snow particle deposition model,based on the critical capture velocity and the critical shear velocity,was elaborated.Simulations based on the unsteady Reynolds-Averaged Navier-Stokes(RANS)approach coupled with Discrete Phase Model(DPM)were used to analyze the motion of snow particles.The results show that the cross beam of the bogie frame,the anti-snake damper,the intermediate brake clamps in the rear wheels,the traction rod and the anti-rolling torsion bar are prone to accumulate snow.The accumulation mass relating to the vertical surface in the rear region,horizontal surface in the front region and the corner area of the bogie is high.The average snow accumulation mass for each component ordered from high to low is as follow:traction rod,frame,bolster,brake clamp 2,anti-rolling torsion bar,brake clamp 1,transverse damper,axle box 2,axle box 1,air spring,anti-snake damper,tread cleaning device.The snow accumulation mass on the front components of the bogie is more significant than that relating to the rear components.Particularly,the average snow accumulation mass of rear brake clamp 2 and axle box 2 is about twice as high as that of the front brake clamp 1 and axle box 1. 展开更多
关键词 High-speed train BOGIE discrete phase model snow drift snow accumulation
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Multi-centric clinical study of the effect of intervention time on efficacy of gastroparesis external application prescription treatment of gastrointestinal tumor postsurgical gastroparesis 被引量:2
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作者 Qin Zhou Minghuan Zuo +7 位作者 Yantao Tian Yanbin Wang Yingjiang Ye chao an Tian Zhou Chuanbo Liu Kaiwen Hu Quanwang Li 《Journal of Traditional Chinese Medical Sciences》 2016年第4期212-219,共8页
Objective:This intervention has been shown to be clinically efficacious and safe.The aim of this study was to determine the effect of different intervention times on the efficacy of gastroparesis external application ... Objective:This intervention has been shown to be clinically efficacious and safe.The aim of this study was to determine the effect of different intervention times on the efficacy of gastroparesis external application prescription versus placebo for the treatment of gastrointestinal tumor postoperative,postsurgical gastroparesis.Methods:A multicenter,randomized,double-blind,placebo controlled phaseⅢclinical trial was designed to demonstrate superiority and conducted at four grade 3A hospitals in Beijing.Patients diagnosed with gastrointestinal tumor postsurgical gastroparesis and local cold syndrome in the abdomen were enrolled and received conventional treatment(nutritional support,gastrointestinal decompression,and prokinetic medication).Treatment and control groups respectively received gastroparesis external application prescription or placebo acupoint application over a treatment course of 14 days or until the primary efficacy endpoint(clinical efficiency)was achieved.Results:A total of 120 patients were enrolled in the treatment and control groups(n Z 60 per group),and 15 patients dropped out of the study because of skin allergies(n Z 7)or poor efficacy(nZ8).The efficacy among patients in Class B of Group A(treatment group)was marginally better than that of Group B(control group)(64.28%vs.55.56%)although the difference between the two groups was not significant.However,the efficacy among patients in Class C of Group A was significantly better than that of Group B(79.49%vs.43.33%).For Group A,the time for patients in the three classes to achieve the efficacy endpoint increased significantly with disease progression(3.00,6.78,and 8.29 days for Class A,B,and C,respectively).Conclusions:Gastroparesis external application prescription can effectively treat gastrointestinal tumor postsurgical gastroparesis and may be more efficacious in progressive disease compared placebo.Patients with gastrointestinal tumor postsurgical gastroparesis should therefore undergo intervention at an earlier stage. 展开更多
关键词 Postsurgical gastroparesis Traditional Chinese medicine Acupoint application Intervention time
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Large-scale edge waves generated by a moving atmospheric pressure 被引量:1
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作者 chao an Philip L-F. Liu Seung Nam Seo 《Theoretical & Applied Mechanics Letters》 CAS 2012年第4期13-16,共4页
Long waves generated by a moving atmospheric pressure distribution, associated with a storm, in coastal region are investigated numerically. For simplicity the moving atmospheric pressure is assumed to be moving only ... Long waves generated by a moving atmospheric pressure distribution, associated with a storm, in coastal region are investigated numerically. For simplicity the moving atmospheric pressure is assumed to be moving only in the alongshore direction and the beach slope is assumed to be a constant in the on-offshore direction. By solving the linear shallow water equations we obtain numerical solutions for a wide range of physical parameters, including storm size (2a), storm speed (U), and beach slope (a). Based on the numerical results, it is determined that edge wave packets are generated if the storm speed is equal to or greater than the critical velocity, Ucr, which is defined as the phase speed of the fundamental edge wave mode whose wavelength is scaled by the width of the storm size. The length and the location of the positively moving edge wave packet is roughly Ut/2 〈 y 〈 Ut, where y is in the alongshore direction and t is the time. Once the edge wave packet is generated, the wavelength is the same as that of the fundamental edge wave mode corresponding to the storm speed and is independent of the storm size, which can, however, affect the wave amplitude. When the storm speed is less than the critical velocity, the primary surface signature is a depression directly correlated to the atmospheric pressure distribution. 展开更多
关键词 edge wave packet moving atmospheric pressure linear and nonlinear shallow water waves numerical solutions
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Experimental and numerical flutter analysis of a folding fin with multiple asymmetric free-plays 被引量:1
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作者 Chenyu LIU chao an +2 位作者 Changchuan XIE Xin ZHanG Lan YanG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第5期332-348,共17页
Experimental folding fin models with an adjustable free-play are tested in a wind tunnel.The fin structure is modeled using the free-interface component mode synthesis method,and its free-play is modeled as four indep... Experimental folding fin models with an adjustable free-play are tested in a wind tunnel.The fin structure is modeled using the free-interface component mode synthesis method,and its free-play is modeled as four independent nonlinear springs with asymmetric stiffness.A nonplanar unsteady vortex-lattice method considering compressibility is employed to address nonlinear deformation and high subsonic flow.Surface spline interpolation is improved through projection and partition.The aeroelastic characteristics of folding fins with different free-play magnitudes,initial conditions and elastic-axis positions are analyzed using an established time-marching method because of its relatively small computation scale and high precision.The results show good consistency among the presented method,the wind tunnel test and the harmonic balance method.There is a negative correlation between the critical speed of divergent motion and the ratio of the initial condition to the free-play magnitude.If either the free-play magnitude or the initial condition is extreme(tiny or vast),the system nonlinearity degenerates to linearity.Generally,the flutter prevention design of a linear model can be applied to a nonlinear model,such as moving the elastic-axis position aftward.The presented fin configuration exhibits an unstable limit cycle oscillation because the orders of coupled flutter modes do not change with variations in equivalent linear stiffness. 展开更多
关键词 Free-play Limit cycle oscillation FLUTTER Component mode synthesis Vortex-lattice method
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High-resolution tsunami hazard assessment for the Guangdong-Hong Kong-Macao Greater Bay Area based on a non-hydrostatic tsunami model
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作者 Yifan ZHU chao an +2 位作者 Houyun YU Wei ZHanG Xiaofei CHEN 《Science China Earth Sciences》 SCIE EI CAS CSCD 2024年第7期2326-2351,共26页
The Guangdong-Hong Kong-Macao Greater Bay Area(GBA)is threatened by potential tsunami hazards from the Littoral Fault Zone(LFZ)and the Manila subduction zone(MSZ),and may suffer huge damage because of its dense popula... The Guangdong-Hong Kong-Macao Greater Bay Area(GBA)is threatened by potential tsunami hazards from the Littoral Fault Zone(LFZ)and the Manila subduction zone(MSZ),and may suffer huge damage because of its dense population,concentrated infrastructure,and low-lying coasts.Previous tsunami studies for the GBA made simple assumptions on the mechanisms of LFZ earthquakes,and used coarse bathymetry data in tsunami simulation,which limited the prediction of detailed tsunami hazard characteristics.In this paper,we develop a parallel dispersive tsunami model PCOMCOT to efficiently simulate dispersive,nonlinear,and breaking tsunami waves.We also construct large-scale and high-resolution bathymetry models for the GBA by correcting and integrating various data sources.Dynamic rupture simulation is performed for the LFZ to obtain a more reliable earthquake source model.We propose several representative earthquake scenarios for the LFZ and MSZ,and use PCOMCOT to calculate the resulting tsunami waves,currents,and inundation in the GBA.Our results indicate that if an M_(w)7.5 oblique-slip earthquake occurs in the LFZ off the Pearl River Estuary(PRE),the subsequent tsunami will primarily impact Hong Kong,causing maximum positive and negative waves of around 1 m and -2 m,respectively,along with slightly destructive currents(≥1.5 m/s).An M_(w)9.0 MSZ megathrust earthquake can lead to widespread inundation with>1 m depth on the outlying islands of Macao and in the urban areas of Hong Kong around the Victoria Harbour.Besides,it will also cause catastrophic tsunami currents along the narrow waterways in Hong Kong and Macao,and the spatial distribution of strong currents(≥3 m/s)shows a considerable discrepancy from the areas of serious inundation.Thus,more attention should be paid to the potential impacts of tsunami currents on the GBA. 展开更多
关键词 Tsunami hazards Inundation Tsunami currents Non-hydrostatic model Guangdong-Hong Kong-Macao Greater Bay Area
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Crystalline-amorphization-recrystallization structural transition and emergent superconductivity in van der Waals semiconductor SiP under compression
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作者 Chunhua Chen Zhenyu Ding +11 位作者 Yonghui Zhou Yifang Yuan Nixian Qian Jing Wang Shuyang Wang Ying Zhou chao an Min Zhang Xuliang Chen Xiaoping Yang Mingliang Tian Zhaorong Yang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2024年第5期115-122,共8页
van der Waals(vdW)semiconductors have gained significant attention due to their unique physical properties and promising applications,which are embedded within distinct crystallographic symmetries.Here,we report a pre... van der Waals(vdW)semiconductors have gained significant attention due to their unique physical properties and promising applications,which are embedded within distinct crystallographic symmetries.Here,we report a pressure-induced crystallineamorphization-recrystallization transition under compression in binary vdW semiconductor SiP.Upon compression to 52 GPa,bulk SiP undergoes a consecutive phase transition from pristine crystalline to amorphous phase,ultimately to recrystallized phase.By employing synchrotron X-ray diffraction experiments in conjunction with high-pressure crystal structure searching techniques,we reveal that the recrystallized Si P hosts a tetragonal structure(space group I4mm)and further transforms partially into a cubic phase(space group Fm3m).Consistently,electrical transport and alternating-current magnetic susceptibility measurements indicate the presence of three superconducting phases,which are embedded in separate crystallographic symmetries—the amorphous,tetragonal,and cubic structures.Furthermore,a high superconducting transition temperature of 12.3 K is observed in its recovered tetragonal phase during decompression.Our findings uncover a novel phase evolution path and elucidate a pressure-engineered structure-property relationship in vdW semiconductor SiP.These results not only offer a new platform to explore the transformation between different structures and functionalities,but also provide new opportunities for the design and exploration of advanced devices based on vdW materials. 展开更多
关键词 RECRYSTALLIZATION transition AMORPHOUS
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New understanding of using“heart adjusting acupuncture method”to prevent and treat atherosclerotic cardiovascular disease
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作者 Yu Gao Guanhu Yang chao an 《Journal of Traditional Chinese Medical Sciences》 CAS 2024年第4期389-394,共6页
This article explores the foundational research,Chinese medicine theories,and clinical applications of the“heart adjusting acupuncture method”developed by Professor Guanhu Yang to prevent and treat athero-sclerotic ... This article explores the foundational research,Chinese medicine theories,and clinical applications of the“heart adjusting acupuncture method”developed by Professor Guanhu Yang to prevent and treat athero-sclerotic cardiovascular disease(ASCVD).Professor Yang established this method based on experimental studies involving electroacupuncture along the horizontal umbilical line,which demonstrated a reduction in infarct area in the myocardial infarction mice model.This method was formulated using acupoints on the horizontal umbilical line:Daimai(GB 26),Tianshu(ST 25),and Daheng(SP 15).Clinical application has shown that it could effectively improve cardiac function and manage various cardiovascular conditions and proposed a new hypothesis for the treatment of myocardial infarction.Further research is required to determine if electroacupuncture stimulation at the site of myocardial infarction or during transportation can extend the critical treatment window,preserve myocardial tissue,and enhance reperfusion therapy prognosis.Professor Yang advocates that,when combined with active Western medicine treatments,the“heart adjusting acupuncture method”offers an effective measure to prevent and treat ASCVD. 展开更多
关键词 Atherosclerotic cardiovascular disease Nociceptor-induced conditioning Heart adjusting acupuncture method Clinical practice
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