Objective To investigate the transportation of chemico-biological particles(CBP) through the micropassage inside the human body in order to improve chemico-biological protection.Methods Dissipative particle dynamics (DPD) method was used to study CBP transportation through micropassages inside the human body.Results The Poiseuille flow could be ensured by imposing boundary conditions including pressure gradient and no-slip.The axial velocity between fluid particles and CBPs was well matched except the area close to the passage wall.However, CBPs tended to accumulate and the density of CBPs slightly increased, leading to the jam effect and producing particle accumulation.Conclusion The characteristic of CBP transportation is better understood,which can help develop some chemico-biological protection devices according to movement of CBPs and improve the performance of CBPs during chemico-biological protection.

Objective To develop a new quasi-zero stiffness isolator for the vibration isolation of the sick and wounded on the ambulance stretcher.Methods The isolator was designed and verified on the basis of the quasi-zero stiffness of slotted disk spring, vibration isolation design method with high static while low dynamic stiffness and co-laminated structure of the spring.Results The theoretical analyses and tests proved the force-displacement curves of the new quasi-zero stiffness isolator fit well. The frequency-weighted acceleration at the buttock and head under different speeds on the asphalt roads was less than 0.315 m/s2.Conclusion The new quasi-zero stiffness isolator developed behaves well in vibration isolation and comfortability for the ambulance stretcher sick and wounded.

OBJECTIVE: To assess and compare the two procedures, total thyroidectomy (TT) and partial thyroidectomy (PT), for papillary thyroid cancer in terms of associated injuries, postoperative complication, recurrence rate and survival, so as to provide a reference and basis for surgical procedure option of this disease. METHOD: Strictly specified into the exclusion criteria, the combination of computer retrieval and manual retrieval and retrieval systems such as CNKI, Wang Fan, PubMed, central, CBM database. Total thyroidectomy and partial thyroidectomy for the treatment of patients with thyroid papillary cancer related literature were compared, with the retrieval time until December 31, 2013. RESULT: According to the retrieval strategy 4630 literatures were found, and 20 witch matched the exclusion criteria were left, all were retrospective study. TT and PT group of recurrent laryngeal nerve injury rate are 5.9%, 2.0% respectively [OR = 0.39, 95% CI (0.17 - 0.90), P < 0.05], TT and PT group of parathyroid injury rate are respectively 4.9%, 0.8% respectively [OR = 0.23, 95% CI (0.08 - 0.68), P < 0.01]. The TT group of 10 years survival rate is 95.24% - 100%, and the PT group is 96.8% - 99.2% [OR = 0.03, 95% CI (0 - 0.34), P < 0.01]. Unstaged, unstaged TT group' postoperative recurrence rate is 4.7%, while PT group is 12.6% [OR = 3.21, 95% CI (1.57 - 6.57), P < 0. 01]. Postoperative recurrence of stage I TT group and PT group are 4.9%, 7.8% respectively [OR = 3.82, 95% CI (1. 07-13.66) P < 0.05]; The rate of stage II TT group is 0.5%, while the rate of PT group is 15.9% [OR = 17.23, 95% CI (4.03 - 73.73), P < 0.01]. CONCLUSION Different methods of primary thyroid papillary carcinoma surgical treatment can all obtaina good survival, but the rate of laryngeal recurrent nerve injury and parathyroid injury caused by partal throidectomy is relatively lower. As a result, partial thyroidectomy can be a good choice for early stage thyroid papillary carcinoma.
Carcinoma ; surgery ; Carcinoma, Papillary ; Humans ; Neoplasm Recurrence, Local ; Parathyroid Glands ; Postoperative Complications ; Recurrent Laryngeal Nerve Injuries ; Retrospective Studies ; Survival Rate ; Thyroid Cancer, Papillary ; Thyroid Neoplasms ; surgery ; Thyroidectomy ; methods