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The pollution level of aldehydes and ketones in indoor air, floor, coating, and furniture samples was analyzed by using high-performance liquid chromatography(HPLC). The study showed that 30 rooms were detected with different concentrations of aldehydes and ketones, with an average value of 0.432 mg/m3, mainly including formaldehyde, acetaldehyde, and acrolein/acetone. The average concentrations of aldehydes and ketones in floor, furniture and coating samples were 0.648 mg/m3, 0.590 mg/m3 and 0.341 mg/m3, respectively. Factor analysis and multiple linear regression analysis were used to determine that the contribution rate of aldehydes and ketones pollution caused by floor, coating and furniture samples accounted for 75.4% of indoor pollution. The least square method was used to fit the concentrations of aldehydes and ketones in indoor air and corresponding decorated materials in 10 rooms. The results showed that the pollution of aldehydes and ketones in these 10 rooms was mainly caused by coating, as well as floor and furniture materials dominated by wood products.

The existing green construction evaluation lacks dynamic nature. Based on the characteristics of urban deep foundation pit construction, PDCA cycle theory gives the dynamic evaluation index weight based on OWA operator, and establishes a dynamic evaluation model. BIM information technology is used to build a platform and Wuhan Yangtze River Shipping Center proves the scientific nature of dynamic evaluation.

Objective: To study the technique of sentinel lymph node mapping in the papillary thyroid carcinoma and its evaluation in the search for cervical metastases., Method: Exploration of the sentinel lymph nodes of the papillary thyroid carcinoma by injection of methylene blue around the tumour among 25 patients during surgery. The nodes which stained blue and the other nodes removed by functional neck dissection were examined histologically after staining with hematoxylin-eosin-saffron (HES). We have evaluated the predictive value of the technique in mapping the cervical metastases in the sentinel lymph node., Results: Among the 25 patients, 22 patients presented sentinel lymph nodes (blue-stained), that is to say a rate of identification of 88%. At histological examination, 19 of the 22 patients had positive sentinel lymph nodes, of which 13 had also positive nodes not coloured with blue. The histological examination of patients without sentinel lymph node was negative., Conclusion: The technique of the sentinel lymph node has a strong positive predictive value in the search for cervical node metastases in the papillary thyroid carcinoma.