Thanks to the waterproof cover, which withstands the weight of a person, the box can also be installed offside the house. Jansen plastic systems are produced by extrusion and are …

Check out our janson box selection for the very best in unique or custom, handmade pieces from our board games shops.

Our Premium+® nest is the benchmark for the breeding industry and can rightly be called the heart of your poultry house! The Premium+ laying nest is well accepted among birds because it offers a comfortable, sheltered and secluded place to lay eggs.

The VDL Jansen Premium+ laying nest is a high quality nest, manufactured of first-class shuttering plywood and plastic side walls. The nest is designed to fulfil the natural needs of the hens by creating comfortable surroundings. The open structure of …

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Jansen UK Ltd is a leading distributer of poultry equipment in the UK with over 35 years of experience supplying customers products for broiler, layer, and breeder houses across the UK.

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2004年12月18日 · 虽然在变换成功率上Johnson变换要好一些，但Box-Cox变换只估计一个参数，而Johnson变换要估计4个参数，因此前者要更直观简捷。 一般的建议还是先尝试Box-Cox变换，在效果不理想的情况下在尝试Johnson变换。 5.一点疑问