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Energy dissipation and contour integral characterizing fracture behavior of incremental plasticity

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Acta Mechanica Sinica 2011年第2期27卷 251-258页

作者： Qi-lin He lin-Zhi wu Ming li hong-Bo Chen Chen Center for Composite Materials Harbin Institute of Technology 150080 Harbin China

J ep -integral is derived for characterizing the frac- ture behavior of elastic-plastic materials. The J ep -integral differs from Rice’s J-integral in that the free energy density rather than the stress working density is employed to define energy-momentum tensor. The J ep -integral is proved to be path-dependent regardless of incremental plasticity and deformation plasticity. The J epintegral possesses clearly clear physical meaning：（1） the value J ep tip evaluated on the infinitely small contour surrounding the crack tip represents the crack tip energy dissipation; （2） when the global steadystate crack growth condition is approached, the value of J ep farss calculated along the boundary contour equals to the sum of crack tip dissipation and bulk dissipation of plastic zone. The theoretical results are verified by simulating mode I crack problems.

关键词： J-integral · Energy dissipation · Proportional loading · Deformation plasticity · Incremental plasticity

Static stress analysis of coupling superconducting solenoid coil assembly for muon ionization cooling experiment

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Nuclear Science and Techniques 2010年第1期21卷 29-34页

作者： PAN Heng WANG li wu hong GUO Xinglong XU Fengyu Institute of Cryogenics and Superconductivity Technology Harbin Institute of Technology Harbin 150080 China

The stresses in the coupling superconducting solenoid coil assembly,which is applied in the Muon Ionization Cooling Experiment (MICE),are critical for the structure design and mechanical stability because of a large diameter and relative high magnetic *** paper presents an analytical stress solution for the MICE coupling coil *** stress due to winding tension is calculated by assuming the coil package as a set of combined *** thermal and electromechanical stresses are obtained by solving the partial differential equations of displacement based on the power series expansion *** analytical stress solution is proved to be feasible by calculating stresses in a tested superconducting solenoid with 2.58 m bore at room *** analytical result of the MICE coupling coil is in good agreement with that of the finite element which shows that the transverse shear stress induced by Lorentz force is principally dominant to magnet instability.

关键词：螺线管线圈耦合线圈应力分析超导线圈组装电离实验冷却

Met-Controlled Allosteric Module of Neural Generation as A New Therapeutic Target in Rodent Brain Ischemia

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Chinese Journal of Integrative Medicine 2021年第12期27卷 896-904页

作者： li Kang-ning ZHANG Ying-ying YU Ya-nan wu hong-li WANG Zhong Department of Traditional Chinese Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijing(100070)China Institute of Basic Research in Clinical Medicine China Academy of Chinese Medical SciencesBeijing(100700)China

Objective To investigate a Met-controlled allosteric module(AM)of neural generation as a potential therapeutic target for brain *** We selected Markov clustering algorithm(MCL)to mine functional modules in the related target *** to the topological similarity,one functional module was predicted in the modules of baicalin(BA),jasminoidin(JA),cholic acid(CA),compared with I/R model *** functional module included three genes:Inppl1,Met and Dapk3(IMD).By gene ontology enrichment analysis,biological process related to this functional module was *** functional module participated in generation of *** blotting was applied to present the compound-dependent regulation of ***-immunoprecipitation was used to reveal the relationship among the three *** used IF to determine the number of newborn neurons between compound treatment group and ischemia/reperfusion *** expressions of vascular endothelial growth factor(VEGF)and matrix metalloproteinase 9(MMP-9)were supposed to show the changing circumstances for neural generation under cerebral *** Significant reduction in infarction volume and pathological changes were shown in the compound treatment groups compared with the I/R model group(Plidated successfully in *** neurons increased in BJC treatment group(P<0.05).The expression of VEGF and MMP-9 decreased in the compound treatment groups compared with the I/R model group(P<0.05).Conclusions AME demonstrates effectiveness of our pioneering approach to the discovery of therapeutic *** novel approach for AM discovery in an effort to identify therapeutic targets holds the promise of accelerating elucidation of underlying pharmacological mechanisms in cere

关键词： allosteric module InppM-Met-Dapk3 generation of neurons brain ischemia

Mixed State and High Effective Utilization of Pilbara Blending Iron Ore Powder

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Journal of Iron and Steel Research International 2011年第9期18卷 1-5页

作者： CAO Yong-guo wu Sheng-li HAN hong-liang WANG hong-wei XUE Fang liU Xiao-qin School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively such as the macroscopic properties, microscopic properties, and high-temperature properties the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was fur ther validated through the sintering pot test and industrial production. The results show that PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45 %.

关键词： Pilbara blending ore sintering mixed state high effective utilization

Tomographic imaging of P wave velocity structure beneath the region around Beijing

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Earthquake Science 2009年第4期22卷 403-408页

作者： Zhifeng Ding Xiaofeng Zhou Yan wu Guiyin li hong Zhang Institute of Geophysics China Earthquake Administration Beijing 100081 China

The three-dimension crustal and upper mantle structures in the region around Beijing were studied by seismic tomography. We used the P wave arrival times from local and teleseismic events. These events were recorded by 250 stations of the North China Seismic Array and 108 stations of the Beijing Telemetry Seismic Network. 118 869 P wave arrivals from 10 285 local events and 12 189 P wave arrivals from 107 teleseismic events were used in the inversion. We obtained the 3-D P wave velocity structure of the crust and upper mantle with the horizontal resolution of 0.3° in the studied region. The tomographic imaging shows the remarkably heterogeneous velocity variation. The velocity anomalies are in well agreement with the geological structure in the shallow crust. The different relationships between seismic activities and velocity anomalies may imply the different seismogenic structure and mechanism. Beneath the Moho under Taihangshan mountain and Yanshan mountain, we found the high velocity anomalies deep to 120 km and 200 km, respectively. The deep high velocity zone may be explained by the existence of the mountain root under Yanshan mountain. The high velocity anomalies in the upper mantle of North China basin may be the relics of the de-rooting from the former craton mantle lithosphere.

关键词： crustal and upper mantle structure Beijing seismic tomography

Fitness of fall armyworm,Spodoptera frugiperda to three solanaceous vegetables

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Journal of Integrative Agriculture 2021年第3期20卷 755-763页

作者： wu li-hong ZHOU Cao LONG Gui-yun YANG Xi-bin WEI Zhi-yan liAO Ying-jiang YANG hong HU Chao-xing Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region Institute of EntomologyGuizhou UniversityGuiyang 550025P.R.China College of Tobacco Science Guizhou UniversityGuiyang 550025P.R.China Scientific Observing and Experimental Station of Crop Pests in Guiyang of Ministry of Agriculture and Rural Affairs Guiyang 550025.P.R.China

The fall armyworm(FAW),Spodoptera frugiperda Smith(Lepidoptera:Noctuidae)is an important agricultural pest that invaded China in the middle of December *** a polyphagous pest,FAW is identified as a serious threat to agricultural production and food security in ***(Capsicum annuum L.),tomato(Solanum lycopersicum Mill.)and eggplant(Solanum melongena L.)are three of dominant solanaceous vegetables of this *** our knowledge,the effects of these plants on the performances of FAW have not been well *** this study we assessed the fitness of this pest to these three *** showed that FAW can complete its life cycle when fed with tomato and pepper,but not on *** population parameters of FAW fed with maize(Zea mays L.)and the three solanaceous vegetables were compared using the age-stage,two-sex life table *** duration was significantly different in the larval stage,but not in the pupae *** fed with pepper had the longest pre-adult period(41.73 d)and the lightest pupal weight(0.1134 g);the survival rate was lower than FAW fed with *** differences were observed in the mean fecundity of female,with the highest(943.95 eggs)laid by FAW fed with *** had the shortest mean generation time(T),the highest intrinsic rate of increase(r)and finite rate of increase(λ)on maize,and the highest net reproductive rate(R_(0))on ***,FAW fitness on the three solanaceous vegetables was:tomato>pepper>*** study provides the foundation for further assessment of FAW risk to solanaceous vegetables and for establishing corresponding control strategies in China.

关键词： Spodoptera frugiperda life table adaptability tomato pepper eggplant

Scheme of Weather-Based Indemnity Indices for Insuring Against Freeze Damage to Citrus Orchards in Zhejiang,China

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Agricultural Sciences in China 2009年第11期8卷 1321-1331页

作者： LOU Wei-ping QIU Xin-fa wu li-hong NI Hu-ping TANG Qi-yi MAO Yu-ding Department of Atmospheric Science Nanjing University oflnformation Science ＆ Technology Nanjing 210044 P..R.China Xinchang Weather Bureau Xinchang 312500 P.R.China Zhejiang Provincial Climate Center Hangzhou 310017 P.R. China Division of Comprehensive Reform Development and Reform Commission of Zhejiang Province Hangzhou 310025 P.R. China College of Agriculture and Biotechnology Zhejiang University Hangzhou 310029 P.R.China

We design a weather-based indemnity index for the insurance against freeze damage to citrus orchards so as to provide technological support for the development of policy-based agriculture. The indices are prepared by separating a relative meteorological yield from the yield that is dependent on tree age, high-yield and low-yield years, and environmental factors, and then using a risk assessment scheme to determine the percentage yield reduction due to the meteorological hazard. We thus develop a set of indices associated with cold temperature damage with which to construct more severe weather indices in conjunction with the yield percentage decrease. We then combine the insured regional citrus yield index with the insured meteorological counterpart to obtain a weather-based indemnity index for the varying degree of freeze damage to crops. When the freeze damage index （FDI） is greater than -7.0℃ for the coastal belt of Zhejiang Province, China, or greater than -9.0℃ for other regions of Zhejiang, weather-based indemnity index （WBII） is zero, meaning there is no compensation; when the FDI is from -7.0 to -7.9℃ for the coastal belt or from -9.0 to -9.9℃ for other regions, the WBII is 1 with 50% compensation; when the FDI is from -8.0 to -8.9℃ for the coastal belt or from -10.0 to -10.9℃ for other regions, the WBII is 2 with 70% compensation; and when the FDI is less than -9.0℃ for the coastal belt or less than -11.0℃ for other regions, the WBII is 3 with 90% compensation. The weather indemnity indices of insured orchards are developed in the interest of owners, thereby eliminating adverse selection and moral hazard issues and providing timely recompense from the insurer, and resolving the problem of high indemnity cost in agricultural insurance.

关键词： citrus orchard freeze damage agricultural insurance weather-based indemnity index

学校体育教育中男性气质的生产生成过程研究——基于德勒兹的身体创造理论

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浙江体育科学 2015年第4期37卷 91-96页

作者：常进吴昱宏同济大学体育教学部上海200092

学校体育教育的不足,不仅影响学生的体质健康,也影响学生精神品格的完善,甚至严重影响男生男性气质的生成。为深入了解学校体育教育在男生男性气质培养方面的独特作用,借鉴德勒兹的身体创造理论,对体育教育中男生男性气质的生产生成过... 详细信息

学校体育教育的不足,不仅影响学生的体质健康,也影响学生精神品格的完善,甚至严重影响男生男性气质的生成。为深入了解学校体育教育在男生男性气质培养方面的独特作用,借鉴德勒兹的身体创造理论,对体育教育中男生男性气质的生产生成过程进行了研究。认为在体育教育中,身体的感觉是男性气质的始源;身体情感的解辖域化是男性气质生产生成的动力;权力意志的培养催化男性气质的生产生成;内化于身体思维是男性气质生产生成的最高阶段。因此,学校体育教育在强调体育愉悦身心的作用的同时,应重视体育在男生男性气质培养方面的功能,在保障安全的条件下,开展一些具有挑战性的项目或进行体育方面的拓展训练。

关键词：体育教育男性气质生产生成身体创造

Segmental transcatheter arterial embolization for primary hepatocellular carcinoma

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World Journal of Gastroenterology 1998年第6期4卷 56-57页

作者： li li, wu Pei hong, li Jin Qing, ZHANG Wei Zhang, liN Hao Gao and ZHANG Ya Qi

AIM To evaluate the therapeutic effects of segmental transcatheter arterial embolization for primary hepatocellular carcinoma, and to recognize the menifestation and clinical value of lipiodol overflow into portal veins surrounding the tumors. METHODS A total of 50 cases of nonresectable primary hepatocellular carcinoma underwent segmental transcatheter arterial embolization. Two methods of superselective segmental catheterization were used, one was the method of wire guiding, and the other the technic of co axial infusion catheter. RESULTS The 1 , 2 , 3 and 4 year cumulative survival rates of 50 cases with segmental transcatheter arterial embolization for primary hepatocellular carcinoma were 83 8%, 65 4%, 42 9% and 24 5% respectively. The incidence of the lipiodol overflow into portal veins was 64%. The overflow of lipiodol into portal veins, represented as 3-5 grade branches of portal veins visualized by lipiodol, was “star like” or “tree like”, and there was a relatively large vessel in the center surrounded with radicalized small branches of vessels. CONCLUSION The lipiodol overflow into portal veins was one of the signs of complete embolization for tumors, and may play a partial role in embolizating the portal venous supply for hepatocellular carcinoma.

关键词： liver neoplasms/therapy carcinoma, hepatocellular/therapy embolization, therapeutic portal veins