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A New Hybrid Model of Amino Acid Substitution for Protein Functional Classification 被引量:1
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作者 Ke Long WANG Zhi Ning WEN +1 位作者 Fu Sheng NIE Meng Long LI 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第8期1133-1136,共4页
关键词 Hybrid model of amino acid substitution protein functional classification Fisher weights.
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FUNCTIONAL CLASSIFICATION OF PITUITARY ADENOMA
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作者 张福林 张玉林 +2 位作者 胡金秀 王善祥 杨德泰 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 1991年第1期65-68,共4页
Pituitary adenoma may be calssifded in light of the hormones produced. 225 surgical specimens were labeled with anti-sear of GH, PRL. ACTH, TSH, FSH and LH by immunohistochemical technique (ABC method). Data indicated... Pituitary adenoma may be calssifded in light of the hormones produced. 225 surgical specimens were labeled with anti-sear of GH, PRL. ACTH, TSH, FSH and LH by immunohistochemical technique (ABC method). Data indicated that 100 out of 225 cases (44.5%) were monohormonal adenomas, including 24 GH, 39 PRL, 1 FSH and 9 LH, 77 (34.2%) were multi-hormonal adenomas, including 28 positive for 2 hormones, 30 positive for 3 hormones, 19 positive for 4 or more different hormones, and the remaining 48 (21.3%) were nonfunctional adenomas. In comparison with Kovacs series, factors which might participate in the mechanism of developing monohormonal or multi-hormonal adenomas are discussed. 展开更多
关键词 ACTH FSH LH PRL functional classification OF PITUITARY ADENOMA GH
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THE CLASSIFICATION OF INDUSTRIAL FUNCTION OF CHINESE CITIES (INCLUDING ATTACHED COUNTIES)
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作者 Zhou Yixing Roy Bradshaw 《Journal of Geographical Sciences》 SCIE CSCD 1990年第2期12-33,共22页
Represents the first attempt to classify all of China’s295 cities in terms of industrial functions,using 1984 data.Within the framework of economic base theory of urban development,three elements are defined as speci... Represents the first attempt to classify all of China’s295 cities in terms of industrial functions,using 1984 data.Within the framework of economic base theory of urban development,three elements are defined as specialized branch,functional intensity and functional scale.The method used here is based on a combination of the three elements.A number of techniques tried made it possible to base the classification on a composite measure,consisting of the Ward’s Error Method of hierarchical cluster analysis and a supplementary application of Nelson measure.The 295 cities have been grouped into three categories with 19 subcategories and 54 functional groups.The distribution of cities in most of the subcategories are displayed on 8 maps. 展开更多
关键词 INDUSTRY urban functional classification cluster analysis
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Rehabilitation of shoulder paresis caused by herpes zoster according to the International Classification of Functioning, Disability and Health A case report 被引量:1
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作者 Qiang Gao Yonghong Yang Chengqi He Shaxin Liu 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第26期2050-2052,共3页
We describe the case of a 73-year-old man with left shoulder paresis caused by a herpes zoster infection of the left C5 dermatomes. The patient had been affected by pain for 10 days, a skin rash on his left shoulder a... We describe the case of a 73-year-old man with left shoulder paresis caused by a herpes zoster infection of the left C5 dermatomes. The patient had been affected by pain for 10 days, a skin rash on his left shoulder and back for 5 days, and weakness of his left shoulder for 2 days before admission. Eiectromyography revealed denervation discharges from the left supraspinatus, infraspinatus and deltoid muscles, which was compatible with radiculopathy showing after zoster infection. The patient was examined in accordance with the International Classification of Functioning, Disability and Health, and treated with range-of-movement and strengthening exercises as well as activities of daily living and social participation. At 14 months after the onset of the condition, muscle strength had returned to normal. Electromyography revealed that motor unit action potentials were largely normal. These results indicate that the rehabilitation of paresis caused by herpes zoster can obtain positive results with suitable movement training. 展开更多
关键词 herpes zoster motor paralysis REHABILITATION International classification of Functioning Disability and Health
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Chronic Diseases of Childhood and the International Classification of Functioning, Disability, and Health: A Systematic Review
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作者 Daniela Koeller Rodrigues Vieira Carla Trevisan M. Ribeiro +1 位作者 Roseane de Lima Ribeiro Lara Carolina Januário Cabral 《Health》 CAS 2022年第7期751-765,共15页
The increase in chronic diseases in childhood highlights the need for a biopsychosocial approach to deal with the complexity of these health conditions. The International Classification of Functioning, Disability, and... The increase in chronic diseases in childhood highlights the need for a biopsychosocial approach to deal with the complexity of these health conditions. The International Classification of Functioning, Disability, and Health (ICF) results from the need to implement new explanatory evaluative and therapeutic models. Thus, the present systematic review aims to identify published studies on the use of the ICF in chronic childhood diseases. As a secondary objective, to map the themes that have already been studied in the area to support the discussion on the expansion of the use of this classification in health services. The systematic review followed the PRISMA protocol, and the model was the PICO acronym, where Population was children and adolescents with chronic diseases, Intervention/Exposure was evaluation based on ICF concepts, Comparator was any tool, instrument, or intervention, and outcome was direct or indirect use of the ICF. We selected eight articles, five of which used the ICF as a conceptual tool and three as a classification system, divided into the following themes: quality of life, evaluation of patients (without using coding) and mapping the inclusion of the activity’s results and participation in clinical trials. Thus, use of the ICF in clinical practice is still incipient, although it has been recommended in guidelines. Further studies are necessary to expand the number of contributions by the ICF and to develop the necessary approaches for understanding the classification’s use. 展开更多
关键词 Chronic Diseases International classification of Functioning DISABILITY and Health CHILD ADOLESCENT Disabled Children
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Prognostic factors and its predictive value in patients with metastatic spinal cancer 被引量:1
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作者 Qing-Peng Gao Da-Zhi Yang +1 位作者 Zheng-Bin Yuan Yu-Xia Guo 《World Journal of Clinical Cases》 SCIE 2021年第20期5470-5478,共9页
BACKGROUND The spine is the most common location of metastatic diseases.Treating a metastatic spinal tumor depends on many factors,including patients’overall health and life expectancy.The present study was conducted... BACKGROUND The spine is the most common location of metastatic diseases.Treating a metastatic spinal tumor depends on many factors,including patients’overall health and life expectancy.The present study was conducted to investigate prognostic factors and clinical outcomes in patients with vertebral metastases.AIM To investigate prognostic factors and their predictive value in patients with metastatic spinal cancer.METHODS A retrospective analysis of 109 patients with metastatic spinal cancer was conducted between January 2015 and September 2017.The prognoses and survival were analyzed,and the effects of factors such as clinical features,treatment methods,primary lesions and affected spinal segments on the prognosis of patients with metastatic spinal cancer were discussed.The prognostic value of Frankel spinal cord injury functional classification scale,metastatic spinal cord compression(MSCC),spinal instability neoplastic score(SINS)and the revised Tokuhashi score for prediction of prognosis was explored in patients with metastatic spinal tumors.RESULTS Age,comorbidity of metastasis from elsewhere,treatment methods,the number of spinal tumors,patient’s attitude toward tumors and Karnofsky performance scale score have an effect on the prognosis of patients(all P<0.05).With respect to classification of spinal cord injury,before operation,the proportion of grade B and grade C was higher in the group of patients who died than in the group of patients who survived,and that of grade D and grade E was lower in the group of patients who died than in the group of patients who survived(all P<0.05).At 1 mo after operation,the proportion of grade A,B and C was higher in the group of patients who died than in the group of patients who survived,and that of grade E was lower in patients in the group of patients who died than in the group of patients who survived(all P<0.05).MSCC occurred in four(14.3%)patients in the survival group and 17(21.0%)patients in the death group(P<0.05).All patients suffered from intractable pain,dysfunction in spinal cord and even paralysis.The proportion of SINS score of 1 to 6 points was lower in the death group than in the survival group,and the proportion of SINS score of 7 to 12 points was higher in the death group than in the survival group(all P<0.05).The proportion of revised Tokuhashi score of 0 to 8 points and 9 to 11 points were higher in the death group than in the survival group,and the proportion of revised Tokuhashi score of 12 to 15 points was lower in the death group than in the survival group(all P<0.05).Frankel spinal cord injury functional classification scale,MSCC,SINS and revised Tokuhashi score were important factors influencing the surgical treatment of patients with metastatic spinal cancer(all P<0.05).CONCLUSION Frankel spinal cord injury functional classification scale,MSCC,SINS and revised Tokuhashi score were helpful in predicting the prognosis of patients with metastatic spinal cancer. 展开更多
关键词 Metastatic spinal tumors Frankel spinal cord injury functional classification scale Metastatic spinal cord compression Spinal instability neoplastic score Revised Tokuhashi score
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Corticoreticular tract lesion in children with developmental delay presenting with gait dysfunction and trunk instability 被引量:1
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作者 Yong Min Kwon Jessica Rose +1 位作者 Ae Ryoung Kim Su Min Son 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第9期1465-1471,共7页
The corticoreticular tract (CRT) is known to be involved in walking and postural control. Using diffusion tensor tractography (DTT), we investigated the relationship between the CRT and gait dysfunction, includ- i... The corticoreticular tract (CRT) is known to be involved in walking and postural control. Using diffusion tensor tractography (DTT), we investigated the relationship between the CRT and gait dysfunction, includ- ing trunk instability, in pediatric patients. Thirty patients with delayed development and 15 age-matched, typically-developed (TD) children were recruited. Fifteen patients with gait dysfunction (bilateral trunk instability) were included in the group A, and the other 15 patients with gait dysfunction (unilateral trunk instability) were included in the group B. The Growth Motor Function Classification System, Functional Ambulation Category scale, and Functional Ambulation Category scale were used for measurement of functional state. Fractional anisotropy, apparent diffusion coefficient, fiber number, and tract integrity of the CRT and corticospinal tract were measured. Diffusion parameters or integrity of corticospinal tract were not significantly different in the three study groups. However, CRT results revealed that both CRTs were disrupted in the group A, whereas CRT disruption in the hemispheres contralateral to clinical mani- festations was observed in the group B. Fractional anisotropy values and fiber numbers in both CRTs were decreased in the group A than in the group TD. The extents of decreases of fractional anisotropy values and fiber numbers on the ipsilateral side relative to those on the contralateral side were greater in the group B than in the group TD. Functional evaluation data and clinical manifestations were found to show strong correlations with CRT status, rather than with corticospinal tract status. These findings suggest that CRT status appears to be clinically important for gait function and trunk stability in pediatric patients and DTT can help assess CRT status in pediatric patients with gait dysfunction. 展开更多
关键词 nerve regeneration corticoreticular tract corticospinal tract GAIT TRUNK diffusion tensor Trunk Control Measurement Scale functional Ambulation Category Growth Motor Function classification System cerebral palsy motor neural regeneration
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Multi-variate Stepwise Discriminant Analysis Research Affecting Portal Hypertension's Grade Factors of Liver Function 被引量:1
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作者 彭志海 覃修福 赵业民 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 1994年第1期56-60,共5页
The idtal time for selecting portal hypertension operation is the accurate judgement of the grade of liver function.yet the present criterion in grading liver functicn is controversial.tco pztitnts vith 20 factoxs rel... The idtal time for selecting portal hypertension operation is the accurate judgement of the grade of liver function.yet the present criterion in grading liver functicn is controversial.tco pztitnts vith 20 factoxs related to poxttl hypeitersor wexe undergone stepwise discriminant analysis by using SAS software on the IBM/PC computer(significance levtl α=0.05).The results show that ascites degree prothrombin tmie(PT),serum total bilirubin,serum albumin content,main portal vein flow are significant fators.In the light of above variates contributing to grading liver function as to estblish a discriminant eqation,it was found that the total agreement rate between replaceable discimination and original Child-Pugh classification is 86%.A test for agieement was performed between discriminant and original classificaton,showing that the two kinds of classification methods have a good agreement rates (Kppa=0.7856),indicating the discriminant classification is of practica values. 展开更多
关键词 portal hypertension liver function classification multi-varate stepwise discrimnant analysis
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Integrating urban morphology and land surface temperature characteristics for urban functional area classification
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作者 Bin Li Yefei Liu +4 位作者 Hanfa Xing Yuan Meng Guang Yang Xiaoding Liu Yaolong Zhao 《Geo-Spatial Information Science》 SCIE EI CSCD 2022年第2期337-352,共16页
The classification of urban functional areas plays an important role in urban planning and resource management.Although previous studies have confirmed that different urban func-tional areas have different morphologic... The classification of urban functional areas plays an important role in urban planning and resource management.Although previous studies have confirmed that different urban func-tional areas have different morphological structures and Land Surface Temperature(LST)characteristics,these two types of characteristics have rarely been fully integrated and used for functional area classification.In this paper,a new framework for classifying urban functional areas is proposed by combining urban morphological features and LST features.First,metrics are constructed from three levels,namely,building,road and region,which are used to portray urban morphology;LST is retrieved using thermal infrared remote sensing to reflect LST features with four metrics:the average temperature,maximum temperature,temperature difference and standard deviation of temperature.Then,the functional areas are classified into four categories:service/public land,commercial land,residential land and industrial land.A random forest algorithm is used to effectively fuse the features of these two categories and classify the functional areas.The effectiveness of the proposed framework is tested in the study area of Shenzhen City,Guangdong Province.The results show that the combined classification accuracy of the proposed classification method is 0.85,which is 0.26 higher than that of the classification model based on urban morphology and 0.1 higher than that of the classification model based on LST features.The proposed framework verifies that the integration of LST features into urban functional area classification is reliable and effectively combines urban morphology and LST features for functional area classification. 展开更多
关键词 Urban function classification urban morphology random forest Land Surface Temperature(LST)
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The value of real-time three-dimensional echocardiography in evaluating left ventricular function for different degrees of heart failure
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作者 Qin Wang Jin-Ping Wang 《Journal of Hainan Medical University》 2020年第17期47-51,共5页
Objective:To explore the value and feasibility of real-time three-dimensional echocardiography(RT-3DE)in evaluating left ventricular function in patients with different degrees of heart failure.Methods:The 60 heart fa... Objective:To explore the value and feasibility of real-time three-dimensional echocardiography(RT-3DE)in evaluating left ventricular function in patients with different degrees of heart failure.Methods:The 60 heart failure patients in the case group were divided into three subgroups according to the New York Heart Association(NYHA)classification:12 cases of cardiac function gradeⅡ,35 cases of cardiac function gradeⅢ,13 cases of cardiac function grade IV,and the other 30 cases of healthy subjects as control group.Compare the left ventricular end-diastolic volume(LVEDV),left ventricular end-systolic volume(LVESV),left ventricular ejection fraction(LVEF),and left ventricular 16,12,and 6 segments reaching the minimum systolic volume time standard deviation standardized value(Tmsv SD%),left ventricular 16,12 and 6 segments reaching the minimum systolic volume time standardized values of the maximum difference(Tmsv DIF%),analysis of the correlation between the above left ventricular function-related parameters and cardiac function grading.Results:(1)There were statistically significant differences in LVEDV and LVESV between each group(p<0.001).There was no statistically significant difference in LVEF between the cardiac function gradeⅡgroup and the control group,and between the grade IV group and the gradeⅢgroup(p=0.094 and 0.246).(2)compared with the control group,all parameters related to RT-3DE evaluation of left ventricular synchronization were prolonged in the case group,and the difference was statistically significant(p<0.001).The differences of Tmsv 16-SD%and Tmsv 16-DIF%in each subgroup of the case group were statistically significant(p<0.001).(3)LVEF was negatively correlated with NYHA classification of cardiac function(rs=-0.779,p<0.001),and LVEDV,LVESV,Tmsv 16-SD%,Tmsv 12-SD%,Tmsv 6-SD%,Tmsv 16-DIF%,Tmsv 12-DIF%,Tmsv 6-DIF%were positively correlated with NYHA function classification,showing strong correlation(rs=0.710,0.785,0.885,0.675,0.605,0.885,0.695,0.622,p<0.001),among them,Tmsv 16-SD%and Tmsv 16-Dif%have the highest correlation.Conclusion:RT-3DE can comprehensively evaluate the impairment of cardiac function.The measured parameters of left ventricular function are strongly correlated with cardiac function classification,which has impo-rtant application value for clinical judgment of the severity of heartfailure. 展开更多
关键词 RT-3DE Heart failure Heart function classification The correlation
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Algae functional group characteristics in reservoirs and lakes with different trophic levels in northwestern semi-humid and semi-arid regions in China 被引量:7
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作者 Jinsuo Lu Zhe Yang Ying Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第2期166-173,共8页
In order to study the differences in algae species and their biomass in water bodies in a region, three reservoirs and two lakes at the center of Guanzhong Plain were chosen to identify algae functional groups, measur... In order to study the differences in algae species and their biomass in water bodies in a region, three reservoirs and two lakes at the center of Guanzhong Plain were chosen to identify algae functional groups, measure biomass, and assess water quality, from January2013 to December 2014. The water bodies represented different trophic levels: one oligotrophic, three mesotrophic, and one eutrophic. Based on the Reynolds’ functional groups, they had 10 groups in common—B, P, D, X1, M, MP, F, S1, J, and G, but the algae biomasses and proportions were different. In the oligotrophic reservoir, functional group B reached a peak biomass of 576 × 104 L-1, which accounted for 31.27%. In the eutrophic lake,functional group D reached a peak biomass of 3227 × 104 L-1, which accounted for only13.38%. When samples collected from other water bodies with similar trophic levels were compared, we found differences in the algae species functional groups. The potential reasons for the differences in algae functional group characteristics in the different water bodies in the region were water temperature and nutritional states. 展开更多
关键词 functional group classifications Lakes and reservoirs Trophic levels functional group characteristics
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Application of the international classification of functioning, disability and health in China 被引量:3
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作者 ZHANG Hong-xia Pamela Enderby SANG Lin 《Chinese Medical Journal》 SCIE CAS CSCD 2011年第21期3588-3591,共4页
Implementation of the International Classification of Functioning, Disability and Health (ICF) started in 2001 with the unanimous endorsement of the classification by the 54th World Health Organization (WHO) as a ... Implementation of the International Classification of Functioning, Disability and Health (ICF) started in 2001 with the unanimous endorsement of the classification by the 54th World Health Organization (WHO) as a framework for describing and measuring health and disability. In recent years, the ICF has been increasingly applied to research and development in China, and has influenced the policies of the Chinese Disabled Person Enterprise and Chinese Rehabilitation Career. This paper introduces the translation, training and spread of ICF and its application in the fields of medicine, society and education in China. 展开更多
关键词 APPLICATION International classification of Functioning Disability and Health China
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Strategic Digital Transformation of State-owned Enterprises:Mission Embedding and Mode Selection-A Case Study Based on the Typical Digital Transformation of Three State-owned Enterprises
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作者 QI Yudong DU Bo WEN Xin 《Frontiers of Business Research in China》 2023年第1期74-125,共52页
China’s state-owned enterprises(SOEs)are facing an embedded integration of new functional mission,new classification reform and new digital development.These new tasks require SOEs to embrace digital strategic transf... China’s state-owned enterprises(SOEs)are facing an embedded integration of new functional mission,new classification reform and new digital development.These new tasks require SOEs to embrace digital strategic transformation and innovation for high-quality fulfillment of their national mission.Studying their digital transformation practices,this paper systematically explores the mechanism and path of embedding national mission into SOE digital transformation,and the mode selection of SOE digital transformation under different mission guidance.The findings are:(1)The SOE functional mission focusing on economic development,strategic support and public services in the new era is undertaken by for-profit,strategic and public functional SOEs;(2)the foreign circulation path based on the positioning mechanism-mapping mechanism and the internal consumption connection path for the state capital strategic positioning constitute a double twoway mechanism of embedding the national mission to the SOE digital strategic transformation,leading SOEs to build market-oriented,capacity-oriented and public-oriented digital transformation modes;(3)the three types of reform modes have respectively produced the action mechanism featuring agile strengthening,toughness strengthening and adaptability strengthening,which support the SOE classification performance.This paper attempts to make up for the research gap such as the lack of integration of the SOE digital strategic transformation mode by constructing the theoretical mode of SOE digital strategic transformation under the guidance of national mission,and reveals the intermediary mechanism of digital strategic transformation to support SOEs for fulfilling their functional missions. 展开更多
关键词 national mission state-owned enterprises(SOEs) functional classification two-way embedding digital strategic transformation
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Efficacy of oral magnesium therapy in the treatment of chronic constipation in spastic cerebral palsy children:a randomized controlled trial 被引量:9
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作者 Sahar M.A.Hassanein Shaymaa M.Deifallah Hend A.Bastawy 《World Journal of Pediatrics》 SCIE CAS CSCD 2021年第1期92-98,共7页
Background Constipation is a common problem in children with spastic cerebral palsy(sCP)with a prevalence that reaches 75%.We hypothesized that treating constipation in those children will improve their health and sho... Background Constipation is a common problem in children with spastic cerebral palsy(sCP)with a prevalence that reaches 75%.We hypothesized that treating constipation in those children will improve their health and shorten time spent in daily care.Our aim was to evaluate the efficacy and safety of oral magnesium sulfate for treating chronic constipation in children with sCP.Methods A prospective,double-blinded randomized control trial was carried out involving 100 children aged 2-12 years with sCP(level Ⅲ-Ⅴ of the Gross Motor Functional Classification system)and chronic constipation.They were followed up in the Pediatric neurology clinic,Children's hospital,Ain Shams University,May 2017-January 2019.The intervention group(O-Mg)received oral magnesium sulfate 1 mL/kg/day daily for 1 month compared to the placebo.Outcome measures were constipation improvement and decrease in bowel evacuation time after 1 month.Results Initially,weekly bowel movements,constipation scores and stool consistency were comparable in both groups.After 1 month of regular administration of oral magnesium sulfate,the constipation score,stool frequency and consistency improved compared to the placebo group(P<0.001).Effective safe treatment was achieved in 31(68%)and 4(9.5%)patients in the O-Mg and placebo groups,respectively(RR,2.95;95%CI 2.0-4.5)(P<0.001).Painful bowel evacuation attempts spent by mothers decreased from 25(55.6%)of the cases initially to 10(22%)cases after one month in the O-Mg group(P=0.001).In contrast,in the placebo group,the decrease went from 21(50%)cases initially to 18(42.9%)after 1 month and was not significant(P=0.5).Conclusions Oral magnesium sulfate seems effective in alleviating chronic constipation and pain experience in children with sCP.Consequently,saving maternal time spent in daily bowel evacuation attempts. 展开更多
关键词 Bristol stool consistency scale Constipation scale Gross Motor functional classification system Magnesium sulfate Painful bowel evacuation SPASTICITY
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Wind Power Prediction Based on Multi-class Autoregressive Moving Average Model with Logistic Function 被引量:1
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作者 Yunxuan Dong Shaodan Ma +1 位作者 Hongcai Zhang Guanghua Yang 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2022年第5期1184-1193,共10页
The seasonality and randomness of wind present a significant challenge to the operation of modern power systems with high penetration of wind generation. An effective shortterm wind power prediction model is indispens... The seasonality and randomness of wind present a significant challenge to the operation of modern power systems with high penetration of wind generation. An effective shortterm wind power prediction model is indispensable to address this challenge. In this paper, we propose a combined model, i.e.,a wind power prediction model based on multi-class autoregressive moving average(ARMA). It has a two-layer structure: the first layer classifies the wind power data into multiple classes with the logistic function based classification method;the second layer trains the prediction algorithm in each class. This two-layer structure helps effectively tackle the seasonality and randomness of wind power while at the same time maintaining high training efficiency with moderate model parameters. We interpret the training of the proposed model as a solvable optimization problem. We then adopt an iterative algorithm with a semi-closed-form solution to efficiently solve it. Data samples from open-source projects demonstrate the effectiveness of the proposed model. Through a series of comparisons with other state-of-the-art models, the experimental results confirm that the proposed model improves not only the prediction accuracy,but also the parameter estimation efficiency. 展开更多
关键词 Wind power prediction wind generation time series analysis logistic function based classification
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Concept of the integrative aspects of the forest ecosystem services with case study on recreation services assessment in Slovakia
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作者 Vladimir Caboun Miroslav Kovalcik Zuzana Sarvasova 《Ecological Processes》 SCIE EI 2014年第1期136-141,共6页
Introduction:This paper presents basic information on the research,classification,and application of the functions of tree species and their communities(mainly forest)in Slovakia.The main aim is a scientific assessmen... Introduction:This paper presents basic information on the research,classification,and application of the functions of tree species and their communities(mainly forest)in Slovakia.The main aim is a scientific assessment of acquired knowledge regarding the functional effects of forests under real ecological,forest management and socio-economic conditions from various regions in Slovakia;the most up-to-date findings concerning the ecology and economics of natural resources will be applied here.The second part of the paper presents methodological possibilities for valuation of outdoor recreation in forests.Different methods and methodological approaches suitable to a valuation of recreation based on various principles and criteria(preference and non-preference methods,cost-based methods,revenue-based methods,and direct and indirect methods)are analyzed.A practical application of one indirect preference method(travel cost method)is made to evaluate outdoor recreation in forests in Slovakia.Results and conclusions:A new classification system and a methodology of integrative utilization of forest functions for the forest ecosystem services are constructed.Outdoor recreation in forests,besides recreational forests and areas,assumes the character of a public good:its use by individuals has some influence on utilization by other individuals,and single users cannot be excluded from its utilization.Therefore,some stimulation for its production is missing.In principle,there are no markets for these kinds of public goods and services.The total value of outdoor recreation in forests in Slovakia amounted to€163.4 million;if opportunity time costs were included,this amounted to as much as€825.7 million. 展开更多
关键词 classification of forest functions Forest functions Outdoor recreation in forests Utilization of the functions of forest tree species
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