检索结果-南通市图书馆

Pedosphere 2011年第3期21卷 400-406页

作者： WANG Jie HUANG Yi jiang Xue-Yan College of Environmental Sciences and Engineering Peking University Beijing 100871 (China) School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen 518055 (China)

Pinus tabulaeformis seedlings were grown under a factorial design to measure biomass accumulation and P, Na and K concentrations of plants, with 3 different ectomycorrhizal fungus (EMF) strains (Boletus edulis, Xerocomus chrysenteron and Gomphidius viscidus) and two P treatments (with or without extra P). Growth and mineral nutrition of pine seedlings were stimulated by three EMF under salinity stress. Na concentrations were changed and plant K and P concentrations were increased significantly by EMF. Adding extra P made no difference in accumulation of seedlings biomass, and did not assist element absorption of plants. Although three strains of EMF can all enhance the tolerance of pine seedlings to salinity stress, they may utilize different mechanisms because of different performance in absorption of elements. The increased P and K accumulation and the balance of ion concentrations might be due to the enhanced tolerance of EMF-inoculated plants to saline conditions.

关键词： afforestation ectomycorrhizae phosphorus deficiency potassium salinity stress

Cooling control for castings by adopting skeletal sand mold design

在线全文

学校读者我要写书评

暂无评论

China Foundry 2021年第1期18卷 18-28页

作者： Jin-wu Kang Hao-long Shangguan Fan Peng Jing-ying Xu cheng-yang Deng Yong-yi Hu Ji-hao Yi Tao Huang Long-jiang Zhang Wei-min Mao School of Materials Science and Engineering Key Laboratory for Advanced Materials Processing TechnologyTsinghua UniversityBeijing100084China Kocel Machinery Limited Ningxia750021China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Beijing DRUCK Technology Development Co.Ltd. Beijing100084China

The cooling control of the melt during the casting process is of great significance. A comprehensive closed-loop cooling control of castings by adopting a skeletal sand mold design was proposed. The skeletal sand mold consisting of an adaptive shell, functional cavities and a support was designed and created based on the finite difference meshes of a casting. It was applied to a round wall test casting. Two kinds of skeletal sand molds, one with lattice support and the other with enforcing ribs for this casting were designed and printed out by the 3 D printing(3 DP) method. Aluminum alloy A356 was cast by using these two sand molds. The first mold was cooled by natural convection, the other one by water spray cooling. Two sound castings were obtained. The sand mold temperature, cooling curves, microstructures, mechanical properties, residual stress and deformation were measured, compared and discussed. Water spray cooling hastened the cooling rate by 62%, increased the content of Mg and Cu in the α-Al matrix, improved the mechanical properties, and altered the surface residual stress state.

关键词： skeletal sand mold 3D printing(3DP) casting solidification cooling

Vegetation Feedback at the Mid-Pliocene

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2013年第5期6卷 320-323页

作者： jiang Da-Bang Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Climate Change Research Center Chinese Academy of Sciences

A global atmospheric general circulation model and an asynchronously coupled global atmosphere-biome model are used to simulate vegetation feedback at the mid-Pliocene approximately 3.3 to 3.0 million years *** that period,the simulated vegetation differed from present conditions at 62％ of the global ice-free land *** feedback had little overall impact on the global climate of the *** the regional scale,however,the interactive vegetation led to statistically significant increases in annual temperature over Greenland,the high latitudes of North America,the mid-high latitudes of eastern Eurasia,and westem Tibet,and reductions in most of the land areas at low latitudes,owing to vegetation-induced changes in surface albedo.

关键词： mid-Pliocene vegetation feedback model

Complex liver retransplantation to treat graft loss due to long-term biliary tract complication after liver transplantation: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第3期8卷 568-576页

作者： jiang Li Qing-Jun Guo Wen-Tao jiang Hong Zheng Zhong-Yang Shen Department of Liver Transplant Tianjin First Central Hospital

BACKGROUND Loss of graft function after liver transplantation(LT) inevitably requires liver retransplant. Retransplantation of the liver(Re LT) remains controversial because of inferior outcomes compared with the primary orthotopic LT(OLT).Meanwhile, if accompanied by vascular complications such as arterial and portal vein(PV) stenosis or thrombosis, it will increase difficulties of surgery. We hereby introduce our center’s experience in Re LT through a complicated case of *** SUMMARY We report a patient who suffered from hepatitis B-associated cirrhosis and underwent LT in December 2012. Early postoperative recovery was *** months after LT, the patient’s bilirubin increased significantly and he was diagnosed with an ischemic-type biliary lesion caused by hepatic artery occlusion. The patient underwent percutaneous transhepatic cholangial drainage and repeatedly replaced intrahepatic biliary drainage tube regularly for 5 *** patient developed progressive deterioration of liver function and underwent liver re-transplant in January 2019. The operation was performed in a classic OLT manner without venous bypass. Both the hepatic artery and PV were occluded and could not be used for anastomosis. The donor PV was anastomosed with the recipient’s left renal vein. The donor hepatic artery was connected to the recipient’s abdominal aorta. The bile duct reconstruction was performed in an end-to-end manner. The postoperative process was very uneventful and the patient was discharged 1 mo after *** With the development of surgical techniques, portal thrombosis and arterial occlusion are no longer contraindications for ReLT.

关键词： Liver retransplantation Biliary tract complication Ischemic type biliary lesion Portal vein thrombosis Arterial occlusion Graft liver failure Case report

Probiotics and irritable bowel syndrome

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第36期19卷 5973-5980页

作者： Cong Dai Chang-Qing Zheng Min jiang Xiao-Yu Ma Li-Juan jiang Department of Cadre Ward V First Affiliated Hospital China Medical University Department of Gastroenterology Second Affiliated Hospital China Medical University Department of Gastroenterology First Affiliated Hospital China Medical University

Irritable bowel syndrome(IBS)is common gastrointestinal *** is characterized by abdominal pain or discomfort,and is associated with changes in stool frequency and/or *** etiopathogenesis of IBS may be multifactorial,as is the pathophysiology,which is attributed to alterations in gastrointestinal motility,visceral hypersensitivity,intestinal microbiota,gut epithelium and immune function,dysfunction of the brain-gut axis or certain psychosocial *** therapeutic strategies are often *** is now increasing evidence linking alterations in the gastrointestinal microbiota and *** are living organisms which,when ingested in certain numbers,exert health benefits beyond inherent basic *** have numerous positive effects in the gastrointestinal ***,many studies have suggested that probiotics are effective in the treatment of *** mechanisms of probiotics in IBS are very *** purpose of this review is to summarize the evidence and mechanisms for the use of probiotics in the treatment of IBS.

关键词： Probiotics Irritable bowel syndrome Visceral hypersensitivity Brain-gut axis Immune function

ANALYSIS AND MODELING ON CULTIVATED LAND CONVERSION——Case Study of Hebei Province

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Geographical Science 2006年第1期16卷 18-23页

作者： LIANG Shuang jiang Nan GU Shu-zhong Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P. R. China Development Research Centre of the Ministry of Water Resources Beijing 100038 P. R. China

： With the acceleration of thc urbanization and industrialization of China, it is inevitable that cultivated land convcrts to built-up land for industrial, commercial and residential uses, which would impose pressure both on food security and on the sustainability of urbanization itself tbr such a country with large population and few cultivated land. Based on thc three-time Landsat Thematic Mapper （TM） digital imagcs and statistic data of Hebei Province, the general facts of cultivated land conversion and its driving forces were analyzcd by establishing econometric model in this papcr. Some conclusions werc drawn as the following： during 1985 2000, the rate of cultivated land converting to built-up arca in Hebei was 4.01% or 0.27% pcr year. Of all the converted cultivated land, 20.96% was converted to built-up area and of all the new built-up areas, 83.4% was converted from cultivated land; meanwhile the conversion is uneven not only in time but also in space; factors such as edgc length shared by cultivated land and built-up land, agricultural value per hectare, non-agriculture value per hectarc, GDP, total population, farmer＇s net income per capita and time had significant effects on this conversion.

关键词： cultivated land conversion driving forces economctric model Hebei Province

Textural differences based on apparent diffusion coefficient maps for discriminating pT3 subclasses of rectal adenocarcinoma

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第24期9卷 6987-6998页

作者： Zhi-Hua Lu Kai-Jian Xia Heng jiang Jian-Long jiang Mei Wu Department of Radiology Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina Department of Information Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina Department of Surgery Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina Department of Pathology Changshu Hospital Affiliated to Soochow UniversityChangshu No.1 People's HospitalChangshu 215500Jiangsu ProvinceChina

BACKGROUND The accuracy of discriminating pT3a from pT3b-c rectal cancer using highresolution magnetic resonance imaging(MRI)remains unsatisfactory,although texture analysis(TA)could improve such *** To investigate the value of TA on apparent diffusion coefficient(ADC)maps in differentiating pT3a rectal adenocarcinomas from pT3b-c *** This was a case-control study of 59 patients with pT3 rectal adenocarcinoma,who underwent diffusion-weighted imaging(DWI)between October 2016 and December *** inclusion criteria were:(1)Proven pT3 rectal adenocarcinoma;(2)Primary MRI including high-resolution T2-weighted image(T2WI)and DWI;and(3)Availability of pathological reports for surgical *** exclusion criteria were:(1)Poor image quality;(2)Preoperative chemoradiation therapy;and(3)A different pathological ***-order(ADC values,skewness,kurtosis,and uniformity)and second-order(energy,entropy,inertia,and correlation)texture features were derived from whole-lesion ADC *** operating characteristic curves were used to determine the diagnostic value for pT3b-c *** The final study population consisted of 59 patients(34 men and 25 women),with a median age of 66 years(range,41-85 years).Thirty patients had pT3a,24 had pT3b,and five had *** the ADC first-order textural differences between pT3a and pT3b-c rectal adenocarcinomas,only skewness was significantly lower in the pT3a tumors than in pT3b-c *** the ADC second-order textural differences,energy and entropy were significantly different between pT3a and pT3b-c rectal *** differentiating pT3a rectal adenocarcinomas from pT3b-c tumors,the areas under the curves(AUCs)of skewness,energy,and entropy were 0.686,0.657,and 0.747,*** regression analysis of all three features yielded a greater AUC(0.775)in differentiating pT3a rectal adenocarcinomas from pT3b-c tumors(69.0%sensitivity and 83.3%specificity).CONCLUSION TA features

关键词： Diffusion-weighted imaging Apparent diffusion coefficient Rectal cancer Cancer stage Texture analysis case-control study

A Provable Positivity-Preserving Local Discontinuous Galerkin Method for the Viscous and Resistive MHD Equations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications on Applied Mathematics and Computation 2024年第1期6卷 279-310页

作者： Mengjiao Jiao Yan jiang Mengping Zhang School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026AnhuiChina

In this paper,we construct a high-order discontinuous Galerkin(DG)method which can preserve the positivity of the density and the pressure for the viscous and resistive magnetohydrodynamics(VRMHD).To control the divergence error in the magnetic field,both the local divergence-free basis and the Godunov source term would be employed for the multi-dimensional *** theoretical analyses are presented for one-dimensional and multi-dimensional DG schemes,respectively,showing that the scheme can maintain the positivity-preserving(PP)property under some CFL conditions when combined with the strong-stability-preserving time ***,general frameworks are established to construct the PP limiter for arbitrary order of accuracy DG *** tests demonstrate the effectiveness of the proposed schemes.

关键词： Viscous and resistive MHD equations Positivity-preserving Discontinuous Galerkin(DG)method High order accuracy

Psychophysiological Effects of Bamboo Plants on Adults

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2017年第11期30卷 846-850页

作者： Ahmad Hassan CHEN Qi Bing jiang Tao LYU Bing Yang LI Nian LI Shu SHANGGUAN Zi Yue LI Yun Ting JUN Zhou Li LUO Qian CHEN Xin Yi WANG Yi Yan ZENG cheng cheng YANG Jun Muhammad Sohaib Tahir College of Landscape Architecture Sichuan Agricultural University School of Electronics Information and Electrical Engineering Shanghai Jiao Tong University

The present study was conducted to clarify the psychophysiological relaxation effects of viewing bamboo on university students. Forty healthy Chinese participants enrolled in this study to clarify the psychophysiological relaxation effects of viewing bamboo. The effects of visual stimulation using a pot both with and without a bamboo were recorded by measuring the student＇s blood pressure, EEG and STAI. We observed that viewing bamboo plants resulted in significantly lower systolic（female, P 〈 0.001; male, P 〈 0.001; P 〈 0.05） and diastolic（female,P 〈 0.001; male, P 〈 0.001; P 〈 0.05） blood pressures, but no changes in the pulse rate（female, P = 0.09; male, P = 0.07; P 〉 0.05） were observed. The results of the EEG analysis indicated brainwave variation（all P 〈 0.05） and lower anxiety scores（P 〈 0.01） after 3 min of viewing bamboo compared with the control. These findings indicate that visual stimulation with bamboo plants induced psychophysiological relaxation effects on adults.

关键词： Psychophysiological Effects o Bamboo Plants on Adults

Refactoring Software Packages via Community Detection in Complex Software Networks

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2013年第2期10卷 157-166页

作者： Wei-Feng Pan Bo jiang Bing Li School of Computer Science and Information Engineering Zhejiang Gongshang University State Key Laboratory of Software Engineering Wuhan University

An intrinsic property of software in a real-world environment is its need to evolve, which is usually accompanied by the increase of software complexity and deterioration of software quality, making software maintenance a tough problem. Refactoring is regarded as an effective way to address this problem. Many refactoring approaches at the method and class level have been proposed. But the research on software refactoring at the package level is very little. This paper presents a novel approach to refactor the package structures of object oriented software. It uses software networks to represent classes and their dependencies. It proposes a constrained community detection algorithm to obtain the optimized community structures in software networks, which also correspond to the optimized package structures. And it finally provides a list of classes as refactoring candidates by comparing the optimized package structures with the real package structures. The empirical evaluation of the proposed approach has been performed in two open source Java projects, and the benefits of our approach are illustrated in comparison with the other three approaches.

关键词： Refactoring community detection complex networks package software