Attended collection and delivery points are vital components of ‘last-mile logistics’.Based on point of interest(POI) data for Cainiao Stations and China Post stations in Changsha City, China, this paper provides a ...Attended collection and delivery points are vital components of ‘last-mile logistics’.Based on point of interest(POI) data for Cainiao Stations and China Post stations in Changsha City, China, this paper provides a detailed exploration of the basic features, spatial distribution, and location influencing factors of attended collection and delivery points.Specifically, analyses of the types, service objects and location distributions of the attended collection and delivery points alongside a discussion of their spatial pattern and influencing factors provides a reference for their general geographic layout and characteristics.The findings of this study indicate that: 1) The main mode of operation of attended collection and delivery points is franchises, with other modes of operation rely on supermarkets and other individual shop types.2) The main service targets of attended collection and delivery points are communities, schools, and businesses, followed by townships, enterprises, scenic spots, and administrative units.3) Approximately 77.44% of the attended collection and delivery points are located near the exits of service areas;others are situated in the centre of the service areas.For the Cainiao Stations, 80% are located within 125 m of the exit;for the China Post stations, 80% are located within 175 m of the exit.4) The spatial distribution of the attended collection and delivery points in Changsha is unbalanced, with ‘more centre and fewer surrounding’.The centre is an ‘inverted triangle’, and the edge is an ‘orphan’, showing a northwest-southeast orientation and symmetrical along the axis.The layout of the attended collection and delivery points forms three core areas, and the number of sites decreases with the distance from the core.5) The number and distribution of the attended collection and delivery points are strongly consistent with the regional economic development level, population, and roadway system traffic convenience.Most attended collection and delivery points are on residential, scientific and educational, and commercial and financial land.展开更多
The aim of this study was to determine the bacteriological quality of raw mixed vegetable salads served in collective catering in Abidjan and to assess the factors likely to favor contamination. An investigation was c...The aim of this study was to determine the bacteriological quality of raw mixed vegetable salads served in collective catering in Abidjan and to assess the factors likely to favor contamination. An investigation was conducted to determine the practical risk of contamination. A total of 306 samples were collected and analyzed for the detection and enumeration of Enterobacteriaceae, E. coli and Salmonella according to standard microbiology methods. The most important risk factors were lack of training (96.7%), decontamination (84.0%), cross-contamination of vegetables in contact with fresh chicken or fish (76.7%) and salads that were uncovered and unprotected, thus exposed to the air and at ambient temperature for sale (97.7%). Theprevalence was 100%, 77.8% and 2.6% respectively for Enterobacteriaceae, E. coli and Salmonella. The average load of Enterobacteriaceae and E. coli was 4.93 log10 (CFU/g) and 1.89 log10 (CFU/g), respectively. Unsatisfactory microbiological quality samples were 52.3%. The results showed a failure of the sanitary quality in more than half of the products. Raising awareness in all of the workers in the food chain for vegetable salads is thus necessary to protect the health of the consumers.展开更多
A solution culture experiment was conducted to investigate the effects of collection time and interferingions on separation and determination of low-molecular-weight organic acids in root exudates of soybeanusing the ...A solution culture experiment was conducted to investigate the effects of collection time and interferingions on separation and determination of low-molecular-weight organic acids in root exudates of soybeanusing the method for directly collecting root exudates. The suitable collection time of root exudates andthe interfering ions affecting organic acid determination were determined. The method for removing theinterfering ions was established and analyzed. The release amount of root exudates increased with theincrease of collection time from 0 to 120 min but decreased with increasing of collection time from 120 to 240min. The maximum exuding amounts of organic acids were observed in root exudates at the collection time of120 min. There was a significant difference of organic acid components between the treatments of collectiontime of 120 min and 240 min. Citric acid was found only in the treatment of 120 min collection time. NO3-was the main interfering ion in organic acid determination and had the same retention time as oxalic acid.Anion exchangs resin (SAX) properly treated by HPLC (high performance liquid chromatography) solventcould remove NO3- anion in sample solution of root exudates, thus enhancing the recoveries of organic acidsin root exudates. There was no significant effect of the chemicals added into sample solution such as H3PO4,SAX and KNO3 on the retention time of organic acids.展开更多
In this paper,based on the process data of evaluating the benchmark land prices of collective construction land and agricultural land,the score of influencing factors is calculated,and a regression model between value...In this paper,based on the process data of evaluating the benchmark land prices of collective construction land and agricultural land,the score of influencing factors is calculated,and a regression model between value-added benefits and influencing factors is established.According to the contribution of the government and collectives to value-added benefits,the distribution proportions of different purposes and levels are calculated.The research results show that there are significant differences in the distribution proportion of value-added income among different levels.The government distribution proportion decreases with the decrease of level,while the collective distribution proportion increases with the decrease of level.For each level of decrease in commercial service industry land and industrial and mining warehousing industry land,the government distribution proportion decreases by an average of 2.66%and 2.34%,while the collective distribution proportion increases by an average of 2.66%and 2.34%,respectively.The average distribution proportion of the government in the value-added income of commercial service industry land is 31.58%,which is much higher than the average income of 23.68%in the value-added income of industrial and mining warehousing industry land.展开更多
目的调查影响自体造血干细胞采集效果的因素。方法调查2018年1月—2023年1月在中国医科大学附属盛京医院行自体造血干细胞采集的140次造血干细胞相关参数,CD34^(+)细胞计数≥2×10^(6)/kg计为良好组,<2×10^(6)/kg计为不佳...目的调查影响自体造血干细胞采集效果的因素。方法调查2018年1月—2023年1月在中国医科大学附属盛京医院行自体造血干细胞采集的140次造血干细胞相关参数,CD34^(+)细胞计数≥2×10^(6)/kg计为良好组,<2×10^(6)/kg计为不佳组。分析两组包括性别、年龄、体重、诊断、采血血量、到达低点天数、低点时白细胞计数、低点到采集天数、采集前1日白细胞计数、采集当日白细胞计数、采集当日淋巴细胞计数、采集当日单核细胞计数、采集当日血红蛋白和红细胞压积、采集干细胞容量、循环总血量等参数的差异。结果两组患者诊断、性别、到达低点天数(中位数8.0 d vs 7.0 d,P<0.05)、低点白细胞计数(中位数0.9×10^(9)/L vs 0.4×10^(9)/L,P<0.05)、低点到采集天数(中位数4.0 d vs 6.0 d,P<0.001)、采集当日白细胞计数(中位数10.8×10^(9)/L vs 7.5×10^(9)/L,P<0.05)、单核细胞计数(中位数2.1×10^(9)/L vs 1.3×10^(9)/L,P<0.001)和淋巴细胞计数(中位数1.1×10^(9)/L vs 0.7×10^(9)/L,P<0.05)、当日血红蛋白值(中位数97.0 g/L vs 91.0 g/L,P<0.05)、当日红细胞压积(中位数29.2%vs 25.9%,P<0.05)、循环血量(中位数9112 mL vs 9998 mL,P<0.05)均有统计学差异。其中患者年龄(中位数49 y vs 52 y)、低点到采集天数(中位数4.0 d vs 6.0 d)、采集当日单核细胞计数(中位数2.1×10^(9)/L vs 1.3×10^(9)/L)是影响采集效果独立风险因素。结论多种因素可能影响患者自体造血干细胞采集效果,年龄、低点到采集天数、采集当日单核细胞计数是影响采集效果独立风险因素。展开更多
基金Under the auspices of the Tang Scholar Program of Northwest University(No.2016)
文摘Attended collection and delivery points are vital components of ‘last-mile logistics’.Based on point of interest(POI) data for Cainiao Stations and China Post stations in Changsha City, China, this paper provides a detailed exploration of the basic features, spatial distribution, and location influencing factors of attended collection and delivery points.Specifically, analyses of the types, service objects and location distributions of the attended collection and delivery points alongside a discussion of their spatial pattern and influencing factors provides a reference for their general geographic layout and characteristics.The findings of this study indicate that: 1) The main mode of operation of attended collection and delivery points is franchises, with other modes of operation rely on supermarkets and other individual shop types.2) The main service targets of attended collection and delivery points are communities, schools, and businesses, followed by townships, enterprises, scenic spots, and administrative units.3) Approximately 77.44% of the attended collection and delivery points are located near the exits of service areas;others are situated in the centre of the service areas.For the Cainiao Stations, 80% are located within 125 m of the exit;for the China Post stations, 80% are located within 175 m of the exit.4) The spatial distribution of the attended collection and delivery points in Changsha is unbalanced, with ‘more centre and fewer surrounding’.The centre is an ‘inverted triangle’, and the edge is an ‘orphan’, showing a northwest-southeast orientation and symmetrical along the axis.The layout of the attended collection and delivery points forms three core areas, and the number of sites decreases with the distance from the core.5) The number and distribution of the attended collection and delivery points are strongly consistent with the regional economic development level, population, and roadway system traffic convenience.Most attended collection and delivery points are on residential, scientific and educational, and commercial and financial land.
文摘The aim of this study was to determine the bacteriological quality of raw mixed vegetable salads served in collective catering in Abidjan and to assess the factors likely to favor contamination. An investigation was conducted to determine the practical risk of contamination. A total of 306 samples were collected and analyzed for the detection and enumeration of Enterobacteriaceae, E. coli and Salmonella according to standard microbiology methods. The most important risk factors were lack of training (96.7%), decontamination (84.0%), cross-contamination of vegetables in contact with fresh chicken or fish (76.7%) and salads that were uncovered and unprotected, thus exposed to the air and at ambient temperature for sale (97.7%). Theprevalence was 100%, 77.8% and 2.6% respectively for Enterobacteriaceae, E. coli and Salmonella. The average load of Enterobacteriaceae and E. coli was 4.93 log10 (CFU/g) and 1.89 log10 (CFU/g), respectively. Unsatisfactory microbiological quality samples were 52.3%. The results showed a failure of the sanitary quality in more than half of the products. Raising awareness in all of the workers in the food chain for vegetable salads is thus necessary to protect the health of the consumers.
文摘A solution culture experiment was conducted to investigate the effects of collection time and interferingions on separation and determination of low-molecular-weight organic acids in root exudates of soybeanusing the method for directly collecting root exudates. The suitable collection time of root exudates andthe interfering ions affecting organic acid determination were determined. The method for removing theinterfering ions was established and analyzed. The release amount of root exudates increased with theincrease of collection time from 0 to 120 min but decreased with increasing of collection time from 120 to 240min. The maximum exuding amounts of organic acids were observed in root exudates at the collection time of120 min. There was a significant difference of organic acid components between the treatments of collectiontime of 120 min and 240 min. Citric acid was found only in the treatment of 120 min collection time. NO3-was the main interfering ion in organic acid determination and had the same retention time as oxalic acid.Anion exchangs resin (SAX) properly treated by HPLC (high performance liquid chromatography) solventcould remove NO3- anion in sample solution of root exudates, thus enhancing the recoveries of organic acidsin root exudates. There was no significant effect of the chemicals added into sample solution such as H3PO4,SAX and KNO3 on the retention time of organic acids.
文摘In this paper,based on the process data of evaluating the benchmark land prices of collective construction land and agricultural land,the score of influencing factors is calculated,and a regression model between value-added benefits and influencing factors is established.According to the contribution of the government and collectives to value-added benefits,the distribution proportions of different purposes and levels are calculated.The research results show that there are significant differences in the distribution proportion of value-added income among different levels.The government distribution proportion decreases with the decrease of level,while the collective distribution proportion increases with the decrease of level.For each level of decrease in commercial service industry land and industrial and mining warehousing industry land,the government distribution proportion decreases by an average of 2.66%and 2.34%,while the collective distribution proportion increases by an average of 2.66%and 2.34%,respectively.The average distribution proportion of the government in the value-added income of commercial service industry land is 31.58%,which is much higher than the average income of 23.68%in the value-added income of industrial and mining warehousing industry land.
文摘目的调查影响自体造血干细胞采集效果的因素。方法调查2018年1月—2023年1月在中国医科大学附属盛京医院行自体造血干细胞采集的140次造血干细胞相关参数,CD34^(+)细胞计数≥2×10^(6)/kg计为良好组,<2×10^(6)/kg计为不佳组。分析两组包括性别、年龄、体重、诊断、采血血量、到达低点天数、低点时白细胞计数、低点到采集天数、采集前1日白细胞计数、采集当日白细胞计数、采集当日淋巴细胞计数、采集当日单核细胞计数、采集当日血红蛋白和红细胞压积、采集干细胞容量、循环总血量等参数的差异。结果两组患者诊断、性别、到达低点天数(中位数8.0 d vs 7.0 d,P<0.05)、低点白细胞计数(中位数0.9×10^(9)/L vs 0.4×10^(9)/L,P<0.05)、低点到采集天数(中位数4.0 d vs 6.0 d,P<0.001)、采集当日白细胞计数(中位数10.8×10^(9)/L vs 7.5×10^(9)/L,P<0.05)、单核细胞计数(中位数2.1×10^(9)/L vs 1.3×10^(9)/L,P<0.001)和淋巴细胞计数(中位数1.1×10^(9)/L vs 0.7×10^(9)/L,P<0.05)、当日血红蛋白值(中位数97.0 g/L vs 91.0 g/L,P<0.05)、当日红细胞压积(中位数29.2%vs 25.9%,P<0.05)、循环血量(中位数9112 mL vs 9998 mL,P<0.05)均有统计学差异。其中患者年龄(中位数49 y vs 52 y)、低点到采集天数(中位数4.0 d vs 6.0 d)、采集当日单核细胞计数(中位数2.1×10^(9)/L vs 1.3×10^(9)/L)是影响采集效果独立风险因素。结论多种因素可能影响患者自体造血干细胞采集效果,年龄、低点到采集天数、采集当日单核细胞计数是影响采集效果独立风险因素。
