The purpose of this research was to develop a new approach in determination of overhaul and maintenance cost of loading equipment in surface mining. Two statistical models including univariate exponential regression (...The purpose of this research was to develop a new approach in determination of overhaul and maintenance cost of loading equipment in surface mining. Two statistical models including univariate exponential regression (UER) and multivariate linear regression (MLR) were used in this study. Loading equipment parameters such as bucket capacity, machine weight, engine power, boom length, digging depth, and dumping height were considered as variables. The results obtained by models and mean absolute error rate indicate that these models can be applied as the useful tool in determination of overhaul and maintenance cost of loading equipment. The results of this study can be used by the decision-makers for the specific surface mining operations.展开更多
Objectives:To access the effectiveness of our modified right-ventricular overhauling procedure on tricuspid valve(TV)growth in patients with pulmonary atresia with intact ventricular septum(PAIVS).Methods:We retrospec...Objectives:To access the effectiveness of our modified right-ventricular overhauling procedure on tricuspid valve(TV)growth in patients with pulmonary atresia with intact ventricular septum(PAIVS).Methods:We retrospectively reviewed 21 patients with PAIVS who underwent modified right ventricular overhauling(mRVoh)between 2008 and 2019 at two institutions.Our mRVoh consisted of wide resection of hypertrophied infundibular and trabecular muscle,peeling off fibrotic endocardial tissue in the right ventricle(RV)cavity,surgical pulmonary valvotomy,and Blalock-Taussig shunt or banding of ductus arteriosus under cardiopulmonary bypass.The TV annulus sizes were measured and analyzed using echocardiography before and after mRVoh.Results:No mortalities were observed during a median follow-up of 3 years(interquartile range:1.3–4.7 years)of follow-up were noted.mRVoh was performed at a median age of 163.5 days(range:21–560 days),including seven neonates and two infants(<60 days).During follow-up,the median TV annular z-score increased significantly from−2.24 to−1.15 before and after mRVoh(p=0.004).In ten patients with a prior history of percutaneous interventions for RV outflow tract(RVOT)widening at least 6 months before mRVoh,the TV annular z-score significantly changed during the period after mRVoh(−2.03 to−1.61,p=0.028)compared with the period before mRVoh(−2.51→–2.03,p=0.575)after percutaneous intervention only.Conclusions:mRVoh in PAIVS patients was positively associated with TV annular growth,and it was more effective than percutaneous RVOT widening interventions without mRVoh.展开更多
THE East African nation of Ethiopia is hoping to inaugurate its first and very own city rail system in 2015. The Addis Ababa Light Railway Transit. being constructed with loans obtained mainly from the Export-Import B...THE East African nation of Ethiopia is hoping to inaugurate its first and very own city rail system in 2015. The Addis Ababa Light Railway Transit. being constructed with loans obtained mainly from the Export-Import Bank of China, is hugely anticipated to ease the chronic transportation woes of Ethiopia＇s congested capital.展开更多
China＇s personal income tax threshold isexpected to rise to 5,000 yuan （$776）per month from the current 3,500 yuan（$544）, according to a draft amendment on theIndividual Income Tax Law recently submittedto the co...China＇s personal income tax threshold isexpected to rise to 5,000 yuan （$776）per month from the current 3,500 yuan（$544）, according to a draft amendment on theIndividual Income Tax Law recently submittedto the countr＇s top legislature, the StandingCommittee of the National People＇s Congress.The amendment is the seventh tax overhaulsince the personal income tax code was issuedin 1980.展开更多
China’s iron and steel industry accelerates its reorganization process China Baowu Steel Group Corp., China’s largest steel producer, has acquired a control ing stake in another steel giant Magang Group, according t...China’s iron and steel industry accelerates its reorganization process China Baowu Steel Group Corp., China’s largest steel producer, has acquired a control ing stake in another steel giant Magang Group, according to an announcement by Maanshan Iron and Steel Co. Ltd.展开更多
The government plans to lift re-strictions on where people work andlive.The move wi1l create a more mo-bile workforce it is hoped.The ministries of public security,construction and agriculture as well asthe State Comm...The government plans to lift re-strictions on where people work andlive.The move wi1l create a more mo-bile workforce it is hoped.The ministries of public security,construction and agriculture as well asthe State Commission for Restructur-ing the Economy have started surveysas a first step to reforming the systemof household registration in smalltowns and cities.展开更多
Reform has brought hope,but also concern,to workers across ChinaThe National Development and Reform Commission published a plan to change China’s golden week holiday system on November 9.The change sees the end of th...Reform has brought hope,but also concern,to workers across ChinaThe National Development and Reform Commission published a plan to change China’s golden week holiday system on November 9.The change sees the end of the three-day May Day holiday and the creation of three single-day holidays that fall on traditional Chinese festivals—the Tomb-Sweeping Day,the Dragon Boat Festival and the Mid- Autumn Festival.One day off work remains on May Day. The change increases the number of non-working daYs per year from 114 to 115. In addition,according to a newly issued paid vacation plan,workers who remain in the same company for more than one year should enjoy a paid vacation,the length展开更多
U.S.President Barack Obama signed a new financial regulatory bill,supposedly the most comprehensive overhaul on Wall Street since the Great Depression in the 1930s,into uly.Zuo Xiaolei,chief economist at the Beijing-b...U.S.President Barack Obama signed a new financial regulatory bill,supposedly the most comprehensive overhaul on Wall Street since the Great Depression in the 1930s,into uly.Zuo Xiaolei,chief economist at the Beijing-based Galaxy Securities Co.Ltd.,contends that the new law could have adverse impact on emerging economies.She shared her views with Shanghai Securities News.Edited excerpts follow:展开更多
针对风机检修业务流程中存在的操作失误和工作延期等问题,应用业务流程预测性监控方法,预测业务的下一事件、下一事件执行时间和剩余时间,以提醒工作人员预防和避免风险的发生。首先,针对不同预测任务,提出一种基于优先级的特征自选取策...针对风机检修业务流程中存在的操作失误和工作延期等问题,应用业务流程预测性监控方法,预测业务的下一事件、下一事件执行时间和剩余时间,以提醒工作人员预防和避免风险的发生。首先,针对不同预测任务,提出一种基于优先级的特征自选取策略,并使用LightGBM(Light Gradient Boosting Machine)算法作为特征选择策略的依托预测模型,得到对预测结果有积极影响的输入特征;然后,针对不同预测任务分别采用LightGBM算法和LSTM(Long Short Term Memory)神经网络构建预测模型;最后,经实验评估和分析,在风机检修业务流程中,特征选择策略能够为不同的预测任务提供有效特征,确保预测的准确率,具有实际应用价值。对于不同预测任务而言,LightGBM算法更适用于下一事件任务预测,LSTM模型更适用于时间方面的任务预测。展开更多
文摘The purpose of this research was to develop a new approach in determination of overhaul and maintenance cost of loading equipment in surface mining. Two statistical models including univariate exponential regression (UER) and multivariate linear regression (MLR) were used in this study. Loading equipment parameters such as bucket capacity, machine weight, engine power, boom length, digging depth, and dumping height were considered as variables. The results obtained by models and mean absolute error rate indicate that these models can be applied as the useful tool in determination of overhaul and maintenance cost of loading equipment. The results of this study can be used by the decision-makers for the specific surface mining operations.
文摘Objectives:To access the effectiveness of our modified right-ventricular overhauling procedure on tricuspid valve(TV)growth in patients with pulmonary atresia with intact ventricular septum(PAIVS).Methods:We retrospectively reviewed 21 patients with PAIVS who underwent modified right ventricular overhauling(mRVoh)between 2008 and 2019 at two institutions.Our mRVoh consisted of wide resection of hypertrophied infundibular and trabecular muscle,peeling off fibrotic endocardial tissue in the right ventricle(RV)cavity,surgical pulmonary valvotomy,and Blalock-Taussig shunt or banding of ductus arteriosus under cardiopulmonary bypass.The TV annulus sizes were measured and analyzed using echocardiography before and after mRVoh.Results:No mortalities were observed during a median follow-up of 3 years(interquartile range:1.3–4.7 years)of follow-up were noted.mRVoh was performed at a median age of 163.5 days(range:21–560 days),including seven neonates and two infants(<60 days).During follow-up,the median TV annular z-score increased significantly from−2.24 to−1.15 before and after mRVoh(p=0.004).In ten patients with a prior history of percutaneous interventions for RV outflow tract(RVOT)widening at least 6 months before mRVoh,the TV annular z-score significantly changed during the period after mRVoh(−2.03 to−1.61,p=0.028)compared with the period before mRVoh(−2.51→–2.03,p=0.575)after percutaneous intervention only.Conclusions:mRVoh in PAIVS patients was positively associated with TV annular growth,and it was more effective than percutaneous RVOT widening interventions without mRVoh.
文摘THE East African nation of Ethiopia is hoping to inaugurate its first and very own city rail system in 2015. The Addis Ababa Light Railway Transit. being constructed with loans obtained mainly from the Export-Import Bank of China, is hugely anticipated to ease the chronic transportation woes of Ethiopia＇s congested capital.
文摘China＇s personal income tax threshold isexpected to rise to 5,000 yuan （$776）per month from the current 3,500 yuan（$544）, according to a draft amendment on theIndividual Income Tax Law recently submittedto the countr＇s top legislature, the StandingCommittee of the National People＇s Congress.The amendment is the seventh tax overhaulsince the personal income tax code was issuedin 1980.
文摘China’s iron and steel industry accelerates its reorganization process China Baowu Steel Group Corp., China’s largest steel producer, has acquired a control ing stake in another steel giant Magang Group, according to an announcement by Maanshan Iron and Steel Co. Ltd.
文摘The government plans to lift re-strictions on where people work andlive.The move wi1l create a more mo-bile workforce it is hoped.The ministries of public security,construction and agriculture as well asthe State Commission for Restructur-ing the Economy have started surveysas a first step to reforming the systemof household registration in smalltowns and cities.
文摘Reform has brought hope,but also concern,to workers across ChinaThe National Development and Reform Commission published a plan to change China’s golden week holiday system on November 9.The change sees the end of the three-day May Day holiday and the creation of three single-day holidays that fall on traditional Chinese festivals—the Tomb-Sweeping Day,the Dragon Boat Festival and the Mid- Autumn Festival.One day off work remains on May Day. The change increases the number of non-working daYs per year from 114 to 115. In addition,according to a newly issued paid vacation plan,workers who remain in the same company for more than one year should enjoy a paid vacation,the length
文摘U.S.President Barack Obama signed a new financial regulatory bill,supposedly the most comprehensive overhaul on Wall Street since the Great Depression in the 1930s,into uly.Zuo Xiaolei,chief economist at the Beijing-based Galaxy Securities Co.Ltd.,contends that the new law could have adverse impact on emerging economies.She shared her views with Shanghai Securities News.Edited excerpts follow:
文摘针对风机检修业务流程中存在的操作失误和工作延期等问题,应用业务流程预测性监控方法,预测业务的下一事件、下一事件执行时间和剩余时间,以提醒工作人员预防和避免风险的发生。首先,针对不同预测任务,提出一种基于优先级的特征自选取策略,并使用LightGBM(Light Gradient Boosting Machine)算法作为特征选择策略的依托预测模型,得到对预测结果有积极影响的输入特征;然后,针对不同预测任务分别采用LightGBM算法和LSTM(Long Short Term Memory)神经网络构建预测模型;最后,经实验评估和分析,在风机检修业务流程中,特征选择策略能够为不同的预测任务提供有效特征,确保预测的准确率,具有实际应用价值。对于不同预测任务而言,LightGBM算法更适用于下一事件任务预测,LSTM模型更适用于时间方面的任务预测。
