检索结果-南通市图书馆

Projection-based Consistent Test for Linear Regression Model with Missing Response and Covariates

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2020年第4期36卷 917-935页

作者： su-jin ZHENG Si-yu GAO Zhi-hua suN China Institute for Actuarial Science/School of Insurance Central University of Finance and EconomicsBeijing 100081China School of Mat hematic Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Big Data Mining and Knowledge Management of Chinese Academy of Sciences Beijing 100049China

In recent years,there has been a large amount of literature on missing *** of them focus on situations where there is only missingness in response or *** this paper,we consider the adequacy check for the linear regression model with the response and covariates missing *** apply model adjustment and inverse probability weighting methods to deal with the missingness of response and covariate,*** order to avoid the curse of dimension,we propose an empirical process test with the linear indicator weighting *** asymptotic properties of the proposed test under the null,local and global alternative hypothe tical models are rigorously investigated.A consisten t wild boot strap method is developed to approximate the critical ***,simulation studies and real data analysis are performed to show that the proposed method performed well.

关键词： consistency linear indicator weighting function empirical process missing response and covariates projection

Room-temperature synthesis of ZrSnO4 nanoparticles for electron transport layer in efficient planar hetrojunction perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第7期42卷 38-45页

作者： Young Wook Noh In su jin Sang Hyun Park Jae Woong Jung Department of Advanced Materials Engineering for Information&Electronics Kyung Hee University1732 Deogyeong-daeroGiheung-guYongin-siGyeonggi-do 446-701Republic of Korea

The interface engineering plays a key role in controlled optoelectronic properties of perovskite photovoltaic devices,and thus the electron transport layer(ETL)material with tailored optoelectronic properties remains a challenge for achieving high photovoltaic performance of planar perovskite solar cells(PSCs).Here,the fine and crystalline zirconium stanate(ZrSnO4)nanoparticles(NPs)was synthesized at low temperature,and its optoelectronic properties are systematically *** from the favorable electronic structure of ZrSnO4 NPs for applications in ETL,efficient electron transport and extraction with suppre s sed charge recombination are achieved at the interface of perovskite *** a result,the optimized ZrSnO4 NPs synthesized at room-temperature deliver the optimized power conversion efficiency up to 16.76%with acceptable *** work opens up a new class of ternary metal oxide for the use in ETL of the planar PSCs and should pave the way toward designing new interfacial materials for practical optoelectronic devices.

关键词： ZrSnO4 Electron transport layer Nanoparticles Perovskite solar cells

What is the best strategy for successful bowel preparation under special conditions?

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第11期20卷 2741-2745页

作者： Yun Jeong Lim su jin Hong Department of Internal Medicine College of MedicineDongguk UniversityGyeonggi-Do 410-773South Korea Digestive Disease Center and Research Institute Department of Internal MedicineSoonchunhyang University College of MedicineBucheonGyeonggi-Do 420-767South Korea

Adequate bowel preparation is important for successful colonoscopic examination. Several effective colonic cleansing agents are available and routinely prescribed, but each carries its own limitations and benefits from particular dosing regimens. The most frequently prescribed colonic cleansing agent, the polyethylene glycol (PEG) cathartic solution, suffers from low patient compliance in general, due to its unpalatable taste and smell coupled with the large ingested volumes required. However, PEG is preferred over other cathartics for use in individuals of advanced age, sufferers of chronic kidney disease, heart failure and inflammatory bowel disease, and women who are pregnant or lactating. The laxative agents sodium phosphate (NaP) and sodium picosulfate plus magnesium citrate have been applied and have improved patient compliance and tolerance. NaP, however, should be avoided in individuals with impaired renal function or plasma clearance, such as those with chronic kidney disease, who are taking drugs that affect renal function, or who suffer from heart failure. Other special conditions that may affect an individual’s tolerance of the cathartic agent or ability to complete the administration routine include stroke, severe constipation, hematochezia, suspicious lower gastrointestinal bleeding, and mental disorders such as dementia. All ingestible bowel preparation solutions can be instilled into the stomach and duodenum through nasogastric tube or esophagogastroduodenoscope with the aid of a water irrigation pump for patients with difficulties swallowing or ingesting the large volumes of fluid required. In addition, dietary regimens based on clear liquids and low-residue foods for 1-4 d prior to the colonoscopy may be supplemental bowel preparation strategies. Achieving an effective and safe cleansing of the bowel is important for successful colonoscopy in all patients, so full knowledge of the individual’s condition and capabilities is necessary

关键词： Colonoscopy Preparation Polyethylene glycols Special conditions Cathartic agent

Drain-site hernia after laparoscopic rectal resection:A case report and review of literature

维普期刊数据库评论

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 Clinical Cases 2022年第8期10卷 2637-2643页

作者： jin su Cheng Deng Hui-Ming Yin Department of General surgery Zhuzhou Central HospitalThe Affiliated Zhuzhou Hospital of Xiangya Medical College of Central South UniversityZhuzhou 412000Hunan ProvinceChina Division of Science and Education Zhuzhou Central HospitalThe Affiliated Zhuzhou Hospital of Xiangya Medical College of Central South UniversityZhuzhou 412000Hunan ProvinceChina Department of General surgery the Second Affiliated Hospital of Hunan University of Traditional Chinese MedicineChangsha 410000Hunan ProvinceChina

BACKGROUND Drain-site hernia(DSH)has an extremely low morbidity and has rarely been *** bowel obstruction is a frequent concurrent condition in most cases of DSH,which commonly occurs at the≥10 mm *** we report a rare case of DSH at the lateral 5 mm port site one month postoperatively without visceral ***,a brief review of the literature was conducted focusing on the risk factors,diagnosis,and prevention strategies for *** suMMARY A 76-year-old male patient was admitted to our institution with intermittent abdominal pain and a local abdominal mass which occurred one month after laparoscopic radical resection of rectal cancer one year ago.A computed tomography scan showed an abdominal wall hernia at the 5 mm former drain-site in the left lower quadrant,and that the content consisted of the large *** elective herniorrhaphy was performed by closing the fascial defect and reinforcing the abdominal wall with a synthetic mesh *** postoperative period was *** patient was discharged seven days after the operation without surgery-related complications at the 1-mo follow-up *** Emphasis should be placed on DSH despite the decreased use of intra-abdominal *** is recommended that placement of a surgical drainage tube at the≥10 mm trocar site should be ***,it is advisable to have a comprehensive understanding of the risk factors for DSH and complete closure of the fascial defect at the drainage site for high-risk patients.

关键词： Drain-site hernia Abdominal hernia Laparoscopic surgery surgical drainage Risk factor Case report

Motor function outcomes of pediatric patients with hemiplegic cerebral palsy after rehabilitation treatment:a diffusion tensor imaging study

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2015年第4期10卷 624-630页

作者： jin Hyun Kim Yong Min Kwon su Min Son Department of Physical Medicine and Rehabilitation School of MedicineYeungnam University

Previous diffusion tensor imaging （DTI） studies regarding pediatric patients with motor dys-function have conifrmed the correlation between DTI parameters of the injured corticospinal tract and the severity of motor dysfunction. There is also evidence that DTI parameters can help predict the prognosis of motor function of patients with cerebral palsy. But few studies are re-ported on the DTI parameters that can relfect the motor function outcomes of pediatric patients with hemiplegic cerebral palsy after rehabilitation treatment. In the present study, 36 pediatric patients with hemiplegic cerebral palsy were included. Before and after rehabilitation treatment, DTI was used to measure the ifber number （FN）, fractional anisotropy （FA） and apparent dif-fusion coefifcient （ADC） of bilateral corticospinal tracts. Functional Level of Hemiplegia scale （FxL） was used to assess the therapeutic effect of rehabilitative therapy on clinical hemiplegia. Correlation analysis was performed to assess the statistical interrelationship between the change amount of DTI parameters and FxL. DTI ifndings obtained at the initial and follow-up evalua-tions demonstrated that more affected corticospinal tract yielded signiifcantly decreased FN and FA values and signiifcantly increased ADC value compared to the less affected corticospinal tract. Correlation analysis results showed that the change amount of FxL was positively correlated to FN and FA values, and the correlation to FN was stronger than the correlation to FA. The results suggest that FN and FA values can be used to evaluate the motor function outcomes of pediatric patients with hemiplegic cerebral palsy after rehabilitation treatment and FN is of more signiif-cance for evaluation.

关键词： nerve regeneration cerebral palsy corticospinal tract diffusion tensor hemiplegia motor rehabilitation neural regeneration

Developmental process of the arcuate fasciculus from infancy to adolescence: a diffusion tensor imaging study

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2016年第6期11卷 937-943页

作者： Hyeong Jun Tak jin Hyun Kim su Min Son Department of Physical Medicine and Rehabilitation School of Medicine Yeungnam University

We investigated the radiologic developmental process of the arcuate fasciculus（AF） using subcomponent diffusion tensor imaging（DTI） analysis in typically developing volunteers. DTI data were acquired from 96 consecutive typically developing children, aged 0–14 years. AF subcomponents, including the posterior, anterior, and direct AF tracts were analyzed. success rates of analysis（AR） and fractional anisotropy（FA） values of each subcomponent tract were measured and compared. AR of all subcomponent tracts, except the posterior, showed a significant increase with aging（P 〈 0.05）. subcomponent tracts had a specific developmental sequence： First, the posterior AF tract, second, the anterior AF tract, and last, the direct AF tract in identical hemispheres. FA values of all subcomponent tracts, except right direct AF tract, showed correlation with subject＇s age（P 〈 0.05）. Increased AR and FA values were observed in female subjects in young age（0–2 years） group compared with males（P 〈 0.05）. The direct AF tract showed leftward hemispheric asymmetry and this tendency showed greater consolidation in older age（3–14 years） groups（P 〈 0.05）. These findings demonstrated the radiologic developmental patterns of the AF from infancy to adolescence using subcomponent DTI analysis. The AF showed a specific developmental sequence, sex difference in younger age, and hemispheric asymmetry in older age.

关键词： tracts tensor younger older developmental maturation typically asymmetry anisotropy fractional

Three-dimensional kagome structures in a PCL/HA-based hydrogel scaffold to lead slow BMP-2 release for effective bone regeneration

在线全文

学校读者我要写书评

暂无评论

Bio-Design and Manufacturing 2023年第1期6卷 12-25页

作者： Se-Hwan Lee kang-Gon Lee Jaeyeon Lee Yong Sang Cho Min-Soo Ghim Soojin Kim su-jin Heo Yongdoo Park Young-Sam Cho Bu-Kyu Lee McKay Orthopaedic Research Laboratory Department of Orthopaedic SurgeryPerelman School of MedicineUniversity of Pennsylvania36th Street and Hamilton WalkPhiladelphiaPA 19104USA Department of Biomedical Sciences College of MedicineKorea University73Goryeodae-roSeongbuk-guSeoul 02841Republic of Korea Medical Device Development Center Daegu-Gyeongbuk Medical Innovation Foundation(K-MEDI hub)80Cheombok-roDong-guDaegu 41061Republic of Korea Department of Mechanical Engineering College of EngineeringWonkwang University460Iksan-daeroIksan 54538Republic of Korea Biomedical Engineering Research Center Asan Institute for Life SciencesAsan Medical Center88Olympic-roSongpa-guSeoul 05505Republic of Korea Department of Mechanical Design Engineering College of EngineeringWonkwang University460Iksan-daeroIksan 54538Republic of Korea MECHABIO Group Wonkwang University460Iksan-daeroIksan 54538Republic of Korea Department of Oral and Maxillofacial surgery Asan Institute for Life SciencesAsan Medical Center88Olympic-roSongpa-guSeoul 05505Republic of Korea

Osteoconductive function is remarkably low in bone disease in the absence of bone tissue surrounding the grafting site,or if the bone tissue is in poor ***,an effective bone graft in terms of both osteoconductivity and osteoinductivity is required for clinical ***,the three-dimensional(3D)kagome structure has been shown to be advantageous for bone tissue regeneration due to its mechanical *** this study,a polycaprolactone(PCL)kagome-structure scaffold containing a hyaluronic acid(HA)-based hydrogel was fabricated using a 3D printing *** retention capacity of the hydrogel in the scaffold was assessed in vivo with a rat calvaria subcutaneous model for 3 weeks,and the results were compared with those obtained with conventional 3D-printed PCL grid-structure scaffolds containing HA-based hydrogel and bulk-type HA-based *** retained hydrogel in the kagome-structure scaffold was further evaluated by in vivo imaging system *** further reinforce the osteoinductivity of the kagome-structure scaffold,a PCL kagome-structure scaffold with bone morphogenetic protein-2(BMP-2)containing HA hydrogel was fabricated and implanted in a calvarial defect model of rabbits for 16 *** bone regeneration characteristics were evaluated with hematoxylin and eosin(H&E),Masson’s trichrome staining,and micro-CT image analysis.

关键词： Kagome-structure scaffold Retention capacity Biomimetic hydrogel Bone morphogenetic protein-2(BMP-2)

Syntheses,Structures and Catalytic Properties of Two Mn(Ⅱ)and Cd(Ⅱ)Coordination Polymers through in Situ Ligand Reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2021年第6期40卷 785-796,685页

作者： ZHAO su-Qin GU jin-Zhong College of Physics and Electronic Information Engineering Qinghai University for NationalitiesXining 810007China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China

Two coordination polymers,namely[Mn(μ-Hcpia)(bipy)(H_(2)O)_(2)]_(n)(1)and[Cd_(3)(μ3-Hcpia)_(2)(μ-Hbiim)_(2)(μ-H_(2)biim)(H_(2)O)_(2)]n(2),have been constructed hydrothermally using H_(2)cbia(H_(2)cbia=5-(4΄-cyano-benzoxy)isophthalic acid),bipy(bipy=4,4΄-bipyridine),H_(2)biim(H_(2)biim=2,2΄-biimidazole),and manganese or cadmium chlorides at 160℃.Interestingly,the H3cpia(H3cpia=5-(4΄-carboxylphenoxy)isophthalic acid)ligand was generated by in situ hydrolysis of cyano group in H_(2)*** products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses(TGA),and single-crystal X-ray diffraction *** compounds crystallize in the triclinic system,space group *** 1 discloses a 1D linear chain of the 2C1 topological *** chains are assembled into a 2D supramolecular sheet through O–H∙∙∙O/N hydrogen *** 2 features a 3D framework with a 3,4,4T25 *** luminescent and catalytic properties of two compounds were *** 1 exhibits a superior catalytic activity in the cyanosilylation at room temperature.

关键词： coordination polymer tricarboxylic acid luminescent properties catalytic properties in situ reaction

同方期刊数据库

NUMERICAL ANALYSIS OF SATURATED-UNSATURATED SEEPAGE FLOW IN FRACTURED ROCK MASS DUE TO suRFACE INFILTRATION

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2001年第4期13卷 28-33页

作者： Hu, Yun-jin su, Bao-Yu Zhan, Mei-Li Dept. of Hydraulic Eng. Tsinghua Univ. Beijing 100084 China

Seepage flow in fractured rock mass due to surface infiltration is a saturated-unsaturated seepage process. Aimed at rock mass with large fracture density, which can be equivalent to continuum, a mathematical model for saturated-unsaturated seepage flow in fractured rock mass due to surface infiltration was established in this paper. The Galerkin finite element method was used in numerical simulation and a finite element program used to calculate saturated-unsaturated seepage flow due to surface infiltration was worked out. A model experiment was used to examine the reasonableness of the program. The results show that the proposed model and program are reasonable. The application of the analysis method in an engineering project shows that the method is reliable and feasible.

关键词： Computer simulation Mathematical models Seepage