Robot Application and Adjustment of Export Product Scope:Can We Have Both Efficiency and Quality?Jianhong Qi,Zhitong Zhang Based on the matching data of China Industrial Enterprise Database and China Customs Database ...Robot Application and Adjustment of Export Product Scope:Can We Have Both Efficiency and Quality?Jianhong Qi,Zhitong Zhang Based on the matching data of China Industrial Enterprise Database and China Customs Database from 2000 to 2015,this paper examines the infuence of robot application(RA)on the export product scope(EPS)of multi-product enterprises(MPEs),the influence channels,and the export competition strategies of these enterprises.The research results show that RA has promoted the expansion of EPS of MPEs,and this promotion effect is prominent especially for the export of laborintensive products,resource-intensive products and for non-state-owned enterprises(SOEs).The adjustment of EPS by RA not only enhances efficiency through productivity improvement effect and cost-saving effect,but also improves quality through emission-reduction effect and product quality effect,which is very obvious in long-quality-ladder enterprises.The RA-expanded product scope covers both old products and new products manufactured in the same industry.Facing fierce competition in the same industry,robot-using enterprises prefer quality competition strategy,which further promotes the expansion of EPS.展开更多
【目的】检验SCOPE(Soil Canopy Observation of Photosynthesis and Energy fluxes)模型用于模拟樟子松人工林的日光诱导叶绿素荧光(sun-induced chlorophyll fluorescence,SIF)和植被总初级生产力(gross primary productivity,GPP)动...【目的】检验SCOPE(Soil Canopy Observation of Photosynthesis and Energy fluxes)模型用于模拟樟子松人工林的日光诱导叶绿素荧光(sun-induced chlorophyll fluorescence,SIF)和植被总初级生产力(gross primary productivity,GPP)动态变化的可能性。【方法】对科尔沁沙地南缘樟子松人工林,基于样地SIF、GPP及气象协同观测数据,利用SCOPE模型模拟SIF与GPP的日变化与季节变化,评估了SCOPE模型在典型晴天、典型多云日、整个观测期的模拟效果。【结果】结果显示,利用气象观测数据及冠层参数(入射短波辐射、气温、大气实际水汽压、CO_(2)浓度及叶面积指数),可驱动SCOPE模型模拟樟子松人工林的SIF与GPP。典型晴天日与多云日的SIF模拟值和实测值的R^(2)分别为0.42与0.52,RMSE分别为0.19与0.18 W·m^(-2)·μm^(-1)·sr^(-1);GPP模拟值和观测值的R^(2)分别为0.78与0.89,RMSE分别为1.87与2.57μmol·m^(-2)·s^(-1)。在季节尺度上,SIF和GPP模拟值和观测值的R^(2)分别为0.50、0.72,RMSE分别为0.19 W·m^(-2)·μm^(-1)·sr^(-1)和2.64μmol·m^(-2)·s^(-1)。在整个观测期,多云日的SIF(R^(2)=0.31,RMSE=0.22 W·m^(-2)·μm^(-1)·sr^(-1))与GPP(R^(2)=0.80,RMSE=2.42μmol·m^(-2)·s^(-1))的模拟效果优于晴天日(SIF:R^(2)=0.30,RMSE=0.26 W·m^(-2)·μm^(-1)·sr^(-1),GPP:R^(2)=0.64,RMSE=3.64μmol·m^(-2)·s^(-1))。SIF模拟值总体高于观测值,当SIF强度较低时易对SIF高估,反之则易低估。GPP的模拟精度较高,模型对较低与较高GPP有所低估,对中间值有所高估。【结论】SCOPE模型可用于日尺度与季节尺度的SIF与GPP模拟,且多云日的模拟精度更高。SCOPE模型对樟子松人工林的GPP模拟结果优于SIF,推测SIF模拟精度较低的原因可能是模型对SIF的模拟是基于阔叶植物的辐射传输过程。未来应发展针对针叶植物的SIF辐射传输模型,为针叶林的辐射传输与荧光遥感监测提供模型基础。展开更多
In recent years, the work of quality supervision and production safety of aquatic products in Nanjing City has been carried out rapidly, and the system of "origin exit, market access, sign traceability, real-time...In recent years, the work of quality supervision and production safety of aquatic products in Nanjing City has been carried out rapidly, and the system of "origin exit, market access, sign traceability, real-time monitoring" has been basically formed, initially realizing the whole-process monitoring on the quality safety of aquatic products from "pond to table". We take the current situation of quality supervision and production safety of aquatic products in Nanjing City as the study object, take the basic work of supervision on aquatic products in Nanjing City and advancing both in scope and in depth as breakthrough point, to sum up the results achieved in the work of quality supervision and production safety of aquatic products in Nanjing City in recent years; make initial exploration and research, in order to consolidate the existing achievements, and further enhance the level of supervision on quality safety of aquatic products in Nanjing City.展开更多
基金the major project(17ZDA040)of National Social Science Fundthe major project(72192842)of National Natural Science Foundation for their support.
文摘Robot Application and Adjustment of Export Product Scope:Can We Have Both Efficiency and Quality?Jianhong Qi,Zhitong Zhang Based on the matching data of China Industrial Enterprise Database and China Customs Database from 2000 to 2015,this paper examines the infuence of robot application(RA)on the export product scope(EPS)of multi-product enterprises(MPEs),the influence channels,and the export competition strategies of these enterprises.The research results show that RA has promoted the expansion of EPS of MPEs,and this promotion effect is prominent especially for the export of laborintensive products,resource-intensive products and for non-state-owned enterprises(SOEs).The adjustment of EPS by RA not only enhances efficiency through productivity improvement effect and cost-saving effect,but also improves quality through emission-reduction effect and product quality effect,which is very obvious in long-quality-ladder enterprises.The RA-expanded product scope covers both old products and new products manufactured in the same industry.Facing fierce competition in the same industry,robot-using enterprises prefer quality competition strategy,which further promotes the expansion of EPS.
基金Supported by Nanjing Science and Technology Plan Project (2008701S)
文摘In recent years, the work of quality supervision and production safety of aquatic products in Nanjing City has been carried out rapidly, and the system of "origin exit, market access, sign traceability, real-time monitoring" has been basically formed, initially realizing the whole-process monitoring on the quality safety of aquatic products from "pond to table". We take the current situation of quality supervision and production safety of aquatic products in Nanjing City as the study object, take the basic work of supervision on aquatic products in Nanjing City and advancing both in scope and in depth as breakthrough point, to sum up the results achieved in the work of quality supervision and production safety of aquatic products in Nanjing City in recent years; make initial exploration and research, in order to consolidate the existing achievements, and further enhance the level of supervision on quality safety of aquatic products in Nanjing City.
