System supply can be realized and the process of system change complete only when the potentially social net benefit under the new system is greater than that of the previous system , and the potentially individual net benefit is greater as well 在运用基本理论具体研究我国农地产权制度的变迁和创新问题时,对现行的家庭承包制进行了产权经济学分析
The economic benefits to be brought about by the cwb is significant . in the first year alone , the cost of the time saved is estimated to be $ 2 . 2 billion . over its 40 - year life span , the net benefit will accrue to a significant sum of $ 122 billion 假设中环湾仔绕道可运作四十年,落成后首年所节省的时间成本估计达二十二亿,而最终可带来约一千二百二十二亿的净效益。
The form , scale , and duration of the intervention should be optimized so that the net benefit of the reduction of dose , i . e . the benefit of the reduction in radiation detriment , less the detriment associated with the intervention , should be maximised 最优化干预的形式规模及持续的时间应当谋求最优化,令减低辐射危害而得到的好处,扣除干预带来的危害后,得到最大的净利益。
The form , scale , and duration of the intervention should be optimized so that the net benefit of the reduction of dose , i . e . the benefit of the reduction in radiation detriment , less the detriment associated with the intervention , should be maximised 干预的形式、规模及持续的时间应当谋求最优化,令减低辐射危害而得到的好处,扣除干预带来的危害后,得到最大的净利益。
Based on mentioned above , as example , the topic 3 selects weidian irrigation area in the south and chengbei irrgation area in the north in huaibei plain , and the maths models have been established with maximal net benefit of annual irrigation as objective according to the method of linear planning of system engineering 以位于淮北平原中南部韦店灌区和北部亳州城北灌区为实例,根据该区农业资源特点、水资源紧缺状况,种植条件、灌排工程现状,采用线性规划方法,建立了两个典型灌区水资源优化配置数学模型。
The fact that there is no level of radiation which can be proven to cause no harm means that the international commission for radiological protection icrp recommends that no practice involving radiation be undertaken unless it is likely to bring a net benefit and that for any such practice , exposure should be kept as low as reasonably achievable alara principle , economic and social considerations being taken into account 由于任何辐射量都不能确保绝对安全,国际放射防护委员会在考虑经济及社会因素后,建议尽量避免涉及辐射的治疗或行为,除非所得的益处较辐射引致的坏影响大,并且在进行的过程中,应把辐照量维持在可合理使用最低剂量alara原则。
At the same time , using the results of model , the paper provides the optimization irrigation quota and the aim of high yield and high benefit based on the principle that the net benefit of unit water is highestusing the model , we can reasonably distribute the irrigation water for spring - wheat during growing period on the condition of different irrigation quota . through evaluating the comparative yield by the model , the paper gains that the reduction of spring - wheat output is biggest when the irrigation quote is between 100 and 200 . the thesis also gains that the corresponding economic irrigation quota is 170 - 120m3 / 667m2 . above results can provide scientific reference for irrigation water optimization distribution for crops in the individual irrigation area and the programming of irrigation district 在现有的生产条件下,可以利用模型在不同的灌溉定额下对春小麦生育期灌水进行合理的分配,并可以利用模型进行作物相对产量的评估,得出当灌溉定额在100 m 200范围内时,春小麦的产量下降幅度较大,最后得出相应的经济灌溉定额为170 120m ~ 3 667m ~ 2 ,为今后河套灌区各灌域多作物灌溉水量最优分配以及灌区的规划设计方面提供了科学参考依据。
Practice refers to any human activity that introduces new radiation sources or exposure pathways , or enlarges the scope of worker exposure , or changes the exposure pathways of existing radiation sources , thereby leading to either exposure of people or an increase in the number of people subject to exposure , for the purpose of obtaining a net benefit 一二辐射作业:指任何引入新辐射源或曝露途径、或扩大受照人员?围、或改变现有辐射源之曝露途径,从而使人们受到之曝露,或受到曝露之人数增加而获得净利益之人类活动。
Recent years , the discharge of yellow river is decrease , so the water volume diverted from yellow river will also be in short supply . aimed at the irrationality use of the water resources , such as attaching importance to yellow river , insufficient use of ground water , the paper gives the maximum net benefits and corresponding water volume both yellow river water and ground water , through the use of linear programming 本文针对目前引黄区重引黄、轻井灌,地下水开采量不足及不合理的状况,分不同黄河来水方案和不同引黄水价(成本)方案,用线性规划对全灌区总引黄水量和地下水量按净效益最优原则分配给各种作物,从而得到灌区最大净效益及相应引黄水量及地下水实际使用量。
Where such enterprises as with capital for actual foreign investment more than 3 million us dollars and less than 5 million us dollars , and complete commission within 18 months since the date of industrial and commercial registration , the enterprises in question shall be granted as a support the 30 % of the city level net benefits of the amount of selling the land 第三条:外资实际投入资金300万美元以上不足500万美元的企业,且自工商登记之日起18个月内完成投产的,给予土地出让金中市级纯收益部分30 %资金扶持。