When the communication time is relatively shorter than the computation time for every task, the task duplication based scheduling (TDS) algorithm proposed by Darbha and Agrawal generates an optimal schedule. Park and ...When the communication time is relatively shorter than the computation time for every task, the task duplication based scheduling (TDS) algorithm proposed by Darbha and Agrawal generates an optimal schedule. Park and Choe also proposed an extended TDS algorithm whose optimality condition is less restricted than that of TDS algorithm, but the condition is very complex and is difficult to satisfy when the number of tasks is large. An efficient algorithm is proposed whose optimality condition is less restricted and simpler than both of the algorithms, and the schedule length is also shorter than both of the algorithms. The time complexity of the proposed algorithm is O(v2), where v represents the number of tasks.展开更多
Remote activation of biomarker sensing holds a great promise of shifting the success of in vitro diagnostics to spatiotemporally controlled in vivo visualization of tumor,and in turn,imaging guided therapy.Herein,a&qu...Remote activation of biomarker sensing holds a great promise of shifting the success of in vitro diagnostics to spatiotemporally controlled in vivo visualization of tumor,and in turn,imaging guided therapy.Herein,a"dual-key-one-lock"nanodevice was designed and built by assembling thermo-activatable probe of trimeric DNA hybrids into a mesoporous polydopamine nanoparticle-based multifunctional nanotransducer(probe host,fluorescence quencher,and photothermal conversion agent),enabling precisely switchable theranostic operations under the co-activation of exo/endogenous stimulations(near-infrared(NIR)light and microRNA(miRNA)).By this design,the NIR irradiation-induced local heat through the porous nanotransducer can be transferred to the DNA nanothermometer for triggering the exposure of the miRNA recognition segment,as well as the subsequent fluorescence activation by strand displacement reactions(SDR).A programmable application of short-(3 min)and long-duration(10 min)NIR irradiation was administered sequentially to induce a milder and a stronger hyperthermia,respectively,to activate the localized miRNA imaging,and in turn,tumor thermoablation under the fluorescence guidance in vivo.By reducing nonspecific activation,dual factor co-activatable nanodevices exhibited a high tumor-to-background ratio(TBR)value of 8.9,as well as a significantly lower(6-9-fold)normal tissue fluorescence as compared with those sensing miRNA solely.The in vivo results show that the tumors were significantly suppressed after the photothermal therapy with the assistance of the accurate miRNA diagnosis.This rationally integrated nanoplatform may pave a new avenue for advanced theranostic systems with high spatiotemporal precision by activatable designs.展开更多
Using a multi-input multi-output production technology and survey data from Jinzhai County, western Anhui Province, China, the author first measured the production performance of rural households their efficiency, ec...Using a multi-input multi-output production technology and survey data from Jinzhai County, western Anhui Province, China, the author first measured the production performance of rural households their efficiency, economy of scale, and productivity during 19781997, and then related the measured production performance with institutional change, market access, and other factors. Preliminary results show that: 1) performance differs a great deal across households and over time; 2) institutional changes and market accessibility have played a major role in improving performance; 3) depending on the specific resources, their effects are variable.展开更多
For improving the environmental quality and ensuring supply of wood and non-timber forest products, many forests have been planted in plain areas of China. Scientists have studied their benefits, almost all of the app...For improving the environmental quality and ensuring supply of wood and non-timber forest products, many forests have been planted in plain areas of China. Scientists have studied their benefits, almost all of the approaches were based on fixed-point data, and few was considered on the non-efficient factors and temporal scale effects. This paper studies the positive and negative benefits at a large temporal scale, and the effects of plain afforestation on stockbreeding and rural economy. The benefits of plain afforestation, correlation coefficiency of agroforestry and production factors are analyzed via stochastic frontier modeling in Huanghuaihai Plain Area of China; elastic coefficient of agroforestry, husbandry, farming, and total output of agricultural sector are calculated through adopting partial differential equation. Some conclusions can be drawn that, plain forests have an important effect on the development of plain agriculture. But shelterbelts and small-scale forests have different effect on the development of agricultural economy. Shelterbelts have negative effect on the industries, but small-scale forest has positive effect. On the whole, contribution of forest resource to value of animal husbandry and gross production value of agriculture is positive, and to the value of farming is negative.展开更多
文摘When the communication time is relatively shorter than the computation time for every task, the task duplication based scheduling (TDS) algorithm proposed by Darbha and Agrawal generates an optimal schedule. Park and Choe also proposed an extended TDS algorithm whose optimality condition is less restricted than that of TDS algorithm, but the condition is very complex and is difficult to satisfy when the number of tasks is large. An efficient algorithm is proposed whose optimality condition is less restricted and simpler than both of the algorithms, and the schedule length is also shorter than both of the algorithms. The time complexity of the proposed algorithm is O(v2), where v represents the number of tasks.
基金supported in part by the National Natural Science Foundation of China(NSFC,Nos.51773022,51825302,21734002)Project No.2019CDQYSW041 supported by the Fundamental Research Funds for the Central Universities,Graduate Scientific Research and Innovation Foundation of Chongqing,China(No.CYB20068)the 100 Talents Program of Chongqing University(J.Z.)。
文摘Remote activation of biomarker sensing holds a great promise of shifting the success of in vitro diagnostics to spatiotemporally controlled in vivo visualization of tumor,and in turn,imaging guided therapy.Herein,a"dual-key-one-lock"nanodevice was designed and built by assembling thermo-activatable probe of trimeric DNA hybrids into a mesoporous polydopamine nanoparticle-based multifunctional nanotransducer(probe host,fluorescence quencher,and photothermal conversion agent),enabling precisely switchable theranostic operations under the co-activation of exo/endogenous stimulations(near-infrared(NIR)light and microRNA(miRNA)).By this design,the NIR irradiation-induced local heat through the porous nanotransducer can be transferred to the DNA nanothermometer for triggering the exposure of the miRNA recognition segment,as well as the subsequent fluorescence activation by strand displacement reactions(SDR).A programmable application of short-(3 min)and long-duration(10 min)NIR irradiation was administered sequentially to induce a milder and a stronger hyperthermia,respectively,to activate the localized miRNA imaging,and in turn,tumor thermoablation under the fluorescence guidance in vivo.By reducing nonspecific activation,dual factor co-activatable nanodevices exhibited a high tumor-to-background ratio(TBR)value of 8.9,as well as a significantly lower(6-9-fold)normal tissue fluorescence as compared with those sensing miRNA solely.The in vivo results show that the tumors were significantly suppressed after the photothermal therapy with the assistance of the accurate miRNA diagnosis.This rationally integrated nanoplatform may pave a new avenue for advanced theranostic systems with high spatiotemporal precision by activatable designs.
文摘Using a multi-input multi-output production technology and survey data from Jinzhai County, western Anhui Province, China, the author first measured the production performance of rural households their efficiency, economy of scale, and productivity during 19781997, and then related the measured production performance with institutional change, market access, and other factors. Preliminary results show that: 1) performance differs a great deal across households and over time; 2) institutional changes and market accessibility have played a major role in improving performance; 3) depending on the specific resources, their effects are variable.
文摘For improving the environmental quality and ensuring supply of wood and non-timber forest products, many forests have been planted in plain areas of China. Scientists have studied their benefits, almost all of the approaches were based on fixed-point data, and few was considered on the non-efficient factors and temporal scale effects. This paper studies the positive and negative benefits at a large temporal scale, and the effects of plain afforestation on stockbreeding and rural economy. The benefits of plain afforestation, correlation coefficiency of agroforestry and production factors are analyzed via stochastic frontier modeling in Huanghuaihai Plain Area of China; elastic coefficient of agroforestry, husbandry, farming, and total output of agricultural sector are calculated through adopting partial differential equation. Some conclusions can be drawn that, plain forests have an important effect on the development of plain agriculture. But shelterbelts and small-scale forests have different effect on the development of agricultural economy. Shelterbelts have negative effect on the industries, but small-scale forest has positive effect. On the whole, contribution of forest resource to value of animal husbandry and gross production value of agriculture is positive, and to the value of farming is negative.
