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Rare Metals 2019年第9期38卷 824-831页

作者： Yao-mian Wang Wei Zhuang Huan-Ping Yang Cong-Hui Zhang School of Metallurgical Engineering Xi’an University of Architecture and Technology

Commercially pure zirconium was processed by the surface mechanical attrition treatment(SMAT),and the microstructure observation showed that a gradient structure was *** measurements were taken to obtain the load-displacement curves at different depths below the treated *** dimensional analysis,the local yield stress,hardness,strain hardening exponent,and elastic modulus at the corresponding depths were *** results showed that the yield stress and hardness varied with depth,while the strain hardening exponent and elastic modulus were approximately *** finite element method was used to simulate nanoindentation at different depths below the treated surface to verify the derivation of the local elastic-plastic constitutive *** curves were computed for the treated samples through the rule of mixtures,and they agreed well with the experimental *** analysis showed that the surface and subsurface hardening layers as well as the transition layer shared a high load applied to the samples,even though their volume fraction was small.

关键词： Mechanical property Severe plastic deformation Gradient microstructure Nanoindentation Finite element method

Intussusception Induced by Transverse Colon Lipoma in a Young Male PatientmOne Case Report

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Clinical oncology and cancer researeh 2011年第4期8卷 247-249页

作者： Ting-ting SUN Yong-xi-SONG xiao-ye ZHANG Miao YU Zhen-ning WANG Hui-mian XU Department of Surgical Oncology and GeneralSurgery First Hospital of China MedicalUniversity Shenyang 110001 LiaoningProvince China

Colonic lipoma is an uncommon benign non-epithelial tumor of the gastrointestinal tract. It typically occurs in the ascending colon and among old female patients. Most cases are asymptomatic and do not require any special treatment. However, we encountered a young male patient with a symptomatic lipoma located in the transverse colon that induced a transcolocolonic intussusception. He presented with such symptoms as diarrhea, tenesmus, abdominal pain, and weight loss. Colonoscopy revealed a spherical polypoid lesion with partial congestion and ulceration on its surface, and the related biopsy and inflammatory cell infiltration. revealed spindle cell hyperplasia Reduction of the intussusception was not attempted, and transverse hemicolectomy was conducted. Although several novel techniques have been reported for the diagnosis and treatment of colonic lipoma, for our case patient, an exact diagnosis was made postoperatively via histological examina- tion and laparotomy was performed.

关键词： transverse colon lipoma intussusception pathology laparotomy.

Identification of the deposited layers in landslides reservoir and investigation of the sediment yields during the later sixteenth century on the Hill Loess Plateau,China

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Chinese Science Bulletin 2008年第24期53卷 3908-3913页

作者： LONG Yi ZHANG xinBao LI Min LI mian ZHANG YunQi Institute of Mountain Hazards and Environment Chinese Academy of Sciences & Ministry of Water Resources Chengdu 610041 China Graduate University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Chinese Academy of Sciences & Ministry of Water Resources Yangling 712100 China Yellow River Administration Bureau Xi'an 710075 China Yellow River Institute of Hydraulic Research Zhengzhou 450003 China

There are many sediment trapping reservoirs in the Hill Loess *** Huangtuwa small catchment is selected as a research field where samples were collected in a sediment deposit profile with a vertical length of 12.73 *** the variation of fine particle content and pollen concentration,54 flood couples were *** the freeze-thawing disturbed texture as the sign of the latest flood couple in a year,it is ascertained that those 54 floods should happen in 31 *** pyramid volume calculation formula,the sediment yields of flood ranged between 716―30376 t·*** average sediment yield was 7106 t·*** annual sediment yields varied between 968―55579 t·(km2·a) -1,and the average value is 12629 t·(km2·a) -*** with the modern annual sediment discharge of the Huaining River,the erosion rate in the Huangtuwa region 450 years ago was similar to the modern erosion *** the period from the 27th year to the 31st year,the average annual sediment yield increased sharply to 31309 t·(km2·a) -*** implied that re-reclamation of the abandoned land in the catchment since the landslide disaster,where vegetation had rehabilitated already,caused very severe soil erosion in the catchment.

关键词：黄土高原小蓄水地塌方水坝水库

Controllability of Semilinear Evolution Equations with Nonlocal Conditions

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Acta Mathematicae Applicatae Sinica 2005年第4期21卷 697-704页

作者： Mei-li Li mian-sen Wang xian-long Fu Department of Applied Mathematics Xi'an Jiaotong University Xi'an 710049 China Department of Mathematics East China Normal University Shanghai 200062 China

In this paper we examine the controllability problems of certain evolution equations with nonlocal conditions. Using the Schaefer fixed-point theorem, we obtain sufficient conditions for controllability and we give an... 详细信息

关键词： Controllability nonlocal conditions mild solutions Schaefer fixed-point theorem

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波浪作用下悬移质泥沙运动的两相流数值模型

水动力学研究与进展（A辑） 2010年第2期25卷 224-230页

作者：李勇余锡平林缅中国科学院力学研究所环境力学重点实验室北京100190 清华大学水沙科学与水利水电工程国家重点实验室北京100084

该文采用基于水沙两相紊流的数值模型对波浪作用下的悬移质泥沙运动进行研究。基本方程中将水相和颗粒相通过相间作用力进行耦合,合理地考虑了相间相对运动的影响。数值计算方法为有限体积法,对流项处理利用了三阶精度的QUICK格式,离散... 详细信息

该文采用基于水沙两相紊流的数值模型对波浪作用下的悬移质泥沙运动进行研究。基本方程中将水相和颗粒相通过相间作用力进行耦合,合理地考虑了相间相对运动的影响。数值计算方法为有限体积法,对流项处理利用了三阶精度的QUICK格式,离散方程组求解采用的是TDMA迭代方法。计算得到的悬移质泥沙垂线时均计算值与不同尺度的水槽实验数据吻合很好,表明数学模型及其计算方法对于低浓度水沙两相问题是合理的。该研究还探讨了悬沙浓度、泥沙沉降速度以及各种相间作用力随时间的分布规律。

关键词：两相流悬移质波浪作用数值模拟

A pharmacological study of pioglitazone in the regulation of adipocyte differentiation

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Journal of Chinese Pharmaceutical Sciences 2022年第3期31卷 176-183页

作者： Chuan Qin Qi Wan Lei xi mian Wei Quan Du State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking University Health Science CenterBeijing 100191China

As a pathological result of the abnormal differentiation of adipocytes,the occurrence of obesity will not only lead to weight gain,abnormal energy metabolism,but also the development of the diseases such as *** studies have focused on the discovery of protein factors that regulate this ***,long noncoding RNAs(lncRNAs)are found to actively participate in the process of adipocyte *** means of literature investigation,we get to know that in the treatment of diabetes,taking pioglitazone for a long time will lead to weight gain and ***,the undeerlying mechanisms are far from being *** this aspect,the effects of pioglitazone treatment on adipocyte differentiation were systematically investigated,in the present *** an in vitro adipocyte differentiation model of 3T3-L1 cells,pioglitazone treatment was found to promot the process of *** were then performed with the effects on protein signaling pathway,in terms of the expressional regulation of PPARγ,C/EBPα,FABP4 and *** further elucidate the effects of pioglitazone,regulation of a adipogenic lncRNA was also investigated in the study.

关键词： Long non-coding RNA Adipocyte differentiation Pioglitazone slincRAD

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Vascular reconstruction of segmental intestinal grafts using autologous internal iliac vessels

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Gastroenterology Report 2021年第4期9卷 350-356,I0002页

作者： Guosheng Wu Yinglun Wu mian Wang Wentong Zhang Chaoxu Liu Tingbo Liang Intestinal Transplant Center The First Affiliated HospitalZhejiang University School of MedicineHangzhouP.R.China Section of Plastic Surgery Dartmouth-Hitchcock Medical CenterLebanonNHUSA State Key Laboratory of Cancer Biology&National Clinical Research Center for Digestive Diseases Xijing HospitalAir Force Military Medical UniversityXi’anChina

Background The aim of this study was to assess whether the autologous internal iliac artery and vein could be used as an interpositional graft for vascular reconstruction in segmental intestinal allografts and *** Thirty-four intestinal transplants(19 living-related allografts and 15 autografts)were conducted in our programs between January 2011 and January *** characteristics,type of vascular reconstruction,and post-operative complications were *** There were 20 males and 14 females with a median age of 35 *** 34 grafts,22(64.7%)(11 allografts and 11 autografts)were revascularized using the autologous internal iliac artery and vein for *** reconstruction on the back table took 2166min to *** total operative time and cold ischemia time tended to be longer in the vascular-reconstruction group than in the direct-anastomosis group(5306226 vs 4406116 and 159649 vs 125666 min,respectively),but these differences were not *** incidence of vascular thrombosis tended to be higher in the direct-anastomosis group than in the vascular-reconstruction group(16.7%vs 0%,P=0.118).At a median follow-up of 36.9 months,no stenosis or pseudoaneurysms *** 19 allografts,acute rejection occurred in 4(21.1%)and chronic rejection occurred in 1(5.2%).Conclusions Our results indicate that the use of an autologous internal iliac interposition graft greatly facilitates intestinal graft implantation and minimizes the risk of vascular complications.

关键词： internal iliac vessel graft intestinal autotransplantation living-related intestinal transplantation

Coordination behavior between zinc salts and L-α-methionine

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Chinese Science Bulletin 1998年第18期43卷 1527-1531页

作者： Shengli Gao Jianrui Liu mian Ji Xuwu Yang Fengxing Zhang Zhongjin Li Department of Chemistry Northwest University Xi’an China Department of Chemical Engineering Northwest Institute of Light Industry Xianyang China

The solubility properties of ZnCl\-2/ZnAc\-2/ZnSO\-4MetH\-2O systems at 25℃ in the whole cocentration range have been investigated by phase equilibrium method. The results indicate that ZnAc\-2 and ZnSO\-4 systems are both simple systems, which do not exist any compound; there are 2 complexes formed in ZnCl\-2 system: Zn（Met）Cl\-2 and Zn（Met）\-2Cl\-2·2H\-2O. Under the direction of phase equilibrium result, 2 solid complexes have been prepared in water and characterized by chemical analysis, IR, Xray diffraction. Their combustion energies have also been determined by means of a RBCtype1 rotatingbomb calorimeter, and their standard enthalpies of formation, Δ f, coor（s）H O-, have been calculated which are （-828.32±3.00） kJ·mol -1 and （-1 117.08±6.15） kJ·mol -1, respectively.

关键词： zinc salts L-methionine phase equilibrium complex standard formation enthalpy.

Tight gas production model considering TPG as a function of pore pressure,permeability and water saturation

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Petroleum Science 2020年第5期17卷 1356-1369页

作者： Atif Zafar Yu-Liang Su Lei Li Jin-Gang Fu Asif Mehmood Wei-Ping Ouyang mian Zhang School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Department of Petroleum Technology University of KarachiUniversity RoadKarachi 75270Pakistan Changqing Downhole Technology Company Chuangqing Drilling Engineering Co.LtdCNPCXi’an 710018ShaanxiChina

Threshold pressure gradient has great importance in efficient tight gas field development as well as for research and laboratory *** experimental study is carried out to investigate the threshold pressure gradient in *** are carried out with and without back pressure so that the effect of pore pressure on threshold pressure gradient may be *** trend of increasing or decreasing the threshold pressure gradient is totally opposite in the cases of considering and not considering the pore *** results demonstrate that the pore pressure of tight gas reservoirs has great influence on threshold pressure *** effects of other parameters like permeability and water saturation,in the presence of pore pressure,on threshold pressure gradient are also examined which show that the threshold pressure gradient increases with either a decrease in permeability or an increase in water *** new correlations of threshold pressure gradient on the basis of pore pressure and permeability,and pore pressure and water saturation,are also *** on these equations,new models for tight gas production are *** gas slip correction factor is also considered during derivation of this proposed tight gas production *** performance relationship curves based on these proposed models show that production rates and absolute open flow potential are always be overestimated while ignoring the threshold pressure gradients.

关键词： Inflow performance relationship Pore pressure Threshold pressure gradient Tight gas field development Tight gas sand reservoir

污染源半定量化的地下水有机污染风险评价——以城区典型排污河周边地下水为例

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中国环境科学 2015年第6期35卷 1709-1718页

作者：于喜鹏宋绵张文静吉林大学环境与资源学院吉林长春130021 中国地质调查局水文地质环境地质调查中心河北保定071051

结合细河沿岸地区水文地质条件及地下水有机污染特征,通过AHP法确定权重,建立DRSIC模型,将评价结果与污染源荷载评价叠加,构建研究区有机污染风险评价模型.并通过研究区有机污染特征检验模型的合理性.结果表明:区内大部分地区有机污染... 详细信息

结合细河沿岸地区水文地质条件及地下水有机污染特征,通过AHP法确定权重,建立DRSIC模型,将评价结果与污染源荷载评价叠加,构建研究区有机污染风险评价模型.并通过研究区有机污染特征检验模型的合理性.结果表明:区内大部分地区有机污染风险中等或低.只有细河沿岸、杨士至于洪区一带污染风险处于高水平.评价结果较好的符合研究区有机污染现状.

关键词： DRASTIC模型 AHP 地下水有机污染风险