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Aggregation¶. The topic guide on Django's database-abstraction API described the way that you can use Django queries that create, retrieve, update and delete individual objects. However, sometimes you will need to retrieve values that are derived by summarizing or aggregating a collection of objects. This topic guide describes the ways that aggregate values can be generated and returned ...T-Rex NVIDIA GPU miner (Ethash / Kawpow / Octopus / MTP) T-Rex is a universal software for mining cryptocurrencies. It supports many algorithms, and we, as developers, try to do everything possible to make it as fast and convenient to use as possible. The developer's fee is 1%. you check your overclocking settings before starting mining.

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This update() operation will set the value of the price field in the first document found containing the embedded document carrier whose fee field value is greater than 2.. To set the value of the price field in all documents containing the embedded document carrier whose fee field value is greater than 2, specify the multi:true option in the update() method:Aggregate Material Property Specified Threshold Values Minimum 10% FACTa 110 Maximum aggregate crushing valueb 29% Liquid limit <25 Linear shrinkagec <2% Plasticity index (PI) <4 a 10% FACT (fines aggregate crushing value) is the force in kilonewtons required to crush a sample of aggregate passing the 13.2-mm and retained on the 9.5-mm sieve so ...

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The $match selects the documents where the author field equals dave, and the aggregation returns the following: { "_id": ObjectId("512bc95fe835e68f199c8686"), "author ...e Emission factors were developed by using the AP-42 Section 13.2.4, Aggregate and Sand Transfer Emission Factors in conjunction with the ratio of aggregate and sand used in an average yard3 of concrete. The unit for these emission factors is kg of pollutant per Mg of aggregate and sand. f References 9, 10, and 14. The emission factor units are ...