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In recent years, the pollution problem of particulate matter, especially PM2.5, is becoming more and more serious, which has attracted many people's attention from all over the world. In this paper, a Kalman prediction model combined with cubic spline interpolation is proposed, which is applied to predict the concentration of PM2.5 in the micro-regional environment of campus, and to realize interpolation simulation diagram of concentration of PM2.5 and simulate the spatial distribution of PM2.5. The experiment data are based on the environmental information monitoring system which has been set up by our laboratory. And the predicted and actual values of PM2.5 concentration data have been checked by the way of Wilcoxon signed-rank test. We find that the value of bilateral progressive significance probability was 0.527, which is much greater than the significant level = 0.05. The mean absolute error (MEA) of Kalman prediction model was 1.8 μg/m , the average relative error (MER) was 6%, and the correlation coefficient was 0.87. Thus, the Kalman prediction model has a better effect on the prediction of concentration of PM2.5 than those of the back propagation (BP) prediction and support vector machine (SVM) prediction. In addition, with the combination of Kalman prediction model and the spline interpolation method, the spatial distribution and local pollution characteristics of PM2.5 can be simulated.
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The paper covered dominant models and organization of healthcare alliances in Xinjiang, illustrating the hospital group model, synergy development model, focused partnership support model, three-level integration model, and other business models.As described by the authors, healthcare alliances in Xinjiang, thanks to telemedicine, have achieved initial success by means of disciplines support, primary care human resources, new technologies and new service spreading, and promotion of appropriate medical techniques, in such aspects as regional medical cooperation, population benefits and medical resources sharing.
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Objective:To explore the effects of voriconazole on the proliferation and morphology of Acanthamoeba cultivated in vitro,and to clarify the killing effects of voriconazole against the trophozoites and cysts of Acanthamoeba.Methods:The Acanthamoeba polyphaga at logarithmic phase were selected and divided into control group and experiment groups(2.5 and 25.0 mg·L-1).The Acanthamoeba in each group was collected at 24,48,72,and 96 h after drug administration,respectively.Then the concentrations of Acanthamoeba were calculated and the proliferation curves were drawn;inverted microscope was used to observe the morphology,activity and adherence of Acanthamoeba;the ultrastructures of Acanthamoeba were observed under electron microscope.Results:Compared with control group,the numbers of Acanthamoeba polyphaga in experiment groups were significantly decreased(P<0.01).The morphology of Acanthamoeba changed significantly under inverted microscope,and the shape of Acanthamoeba transformed from the trophozoites with irregular spiny filopodia to circular cysts.Even a large number of cell debris was observed.Different degrees of damage and even necrosis of Acanthamoeba in experiment groups were found under electron micro scope.Conclusion:Certain concentration of voriconazole can effectively inhibit the proliferation of Acanthamoeba and change the morphology and ultrastructure and kill the trophozoites and cysts of Acanthamoeba cultivated in vitro.
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Objective:To discuss the performance management method for large medical equipments in hospitals.Methods:13 large medical equipments in a large hospital were selected as samples and the economic efficiency analysis method and comprehensive evaluation method were aaplied to carry out performance management of medical equipment.Results:11 sets of medical equipment had good economic returns,the remaining 2 sets of equipments had a greater degree of loss due to lack of business and lack of qualification.Conclusion:Performance management of large medical equipments would help change the efficiency management of equipment from extensive to elaborate management.
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Objective To analyze and evaluate the precision ,accuracy and linearity of the chemiluminescence method for detec‐ting plasma BNP .Methods According to the experimental schemes of CLSI EP15‐A2 ,EP6‐A files and other relevant documents , the precision ,accuracy and linearity of the Siemens Centaur XP chemiluminescence instrument for detecting BNP ,and the detection results were compared with the performance declared by manufacturer or the quality target formulated by laboratory .Results The imprecision of BNP detected by the chemiluminescence method was less than 1/3 TEa regulated by the Clinical Laboratory Center of Ministry of Health (allowable total error);the variation coefficient index (CVR) of internal quality control data was less than ± 2;the relative bias of the results of external quality control blind samples with the target values were less than Tea regulated by the Ministry of Health ;the linear evaluation results showed that BNP was once linearity in the range of 5 .3‐4696 .7 pg/mL .Conclusion The precision ,accuracy and linearity of the Siemens Centaur XP chemiluminescence instrument for detecting BNP can accord withthe quality objectives requirements and meet the clinical needs .
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In recent years, dielectric barrier discharge has been well developed in analytical chemistry, especially in spectrometric analysis. This review emphasizes its applications in atomic spectrometry, including atomic emission spectrometry, atomic absorption spectrometry, and chemical vapor generation for sample introduction to atomic spectrometry.
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Objective: Through managing objectives in our hospital, promote the hospital management. Methods:Use expert advice method to establish the target assessment index system, with the weighted index method to calculate the final score. Results: According to the characteristics of the department, develop differentiated, personalized indicators; objective management system consists of 3 level indicators medical examination standard (680 points), scientific research and teaching standards (220 points), departmental management assessment criteria(100 points), and 45 secondary indicator of internal medicine, surgical 49 second-level indicators. Conclusion: Objective management is the starting point of the hospital and meticulous management, and implementation of objective management enhance the awareness of the collective participation of the medical staffs at all levels, so that the department changes from passive management to active management, and it enhances department execution and promotes the hospital science directly.
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Objective To investigate the risk factors for postmenopausal osteoporosis in Shanghai.Methods Five hundred postmenopausal community-dwelling women aged 45-80 years were recruited. The case-control study was performed from June 2008 to September 2008.A total number of 250 women with postmenopausal osteoporosis identified with their bone mineral density (BMD) were selected as case group, and 250 non-osteoporosis women were selected as control group. BMD was measured by dual energy X-ray absorption (DEXA). Results Univariate logistic regression analysis showed that age, eduction level, occupation, years since menopause, BMI, use of calcium,historyofnon-violencefracture,fall,diabetesmellitus,chronicgastricdiseases, gastrointestinal resection and diarrhea were related to osteoporosis.Multiple logistic regression showed that age, years since menopause and nutritional status were the risk factors for osteoporosis. ConclusionsThe occurrence of osteoporosis is related with many factors in postmenopausal women in Shanghai, and women with early menopause, low BMI and older age should pay more attention to the prevention and treatment of osteoporosis.
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Objective To investigate the operative methods and their efficacy of the modified decompressive craniectomy in combination with indirect revascularization for the treatment of massive cerebral infarction. Methods The clinical data of 15 patients with massive cerebral infarction who underwent modified decompressive craniectomy in combination with encephaloduroarteriomyosynangiosis were analyzed retrospectively. The clinical efficacy was assessed according to the mortality, Barthel Index and modified Rankin scale. Results All the patients were followed up, and 12 patients survived 3 months after operation, of those, 4 had a good functional outcome; 11 patients survived 6 month after operation, of those, 7 had a good functional outcome. Conclusions The modified decompressive craniectomy in combination with indirect revascularization for the treatment of massive cerebral infarction could effectively treat massive cerebral infarction and increase the survival rate and life quality of patients, however, the surgical timing, surgical indications and surgical skills are needed to master accurately.
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Objective:To study the best opportunity for minimal invasive puncture in the treatment of hypertensive intracerebral hemorrhage.Methods:Forty-one patients with hypertensive intracerebral hemorrhage were randomly divided into four groups:<6 h,6-12 h,12-18 h and 18-24 h from the onset of symptoms.The comparison among groups in outcome measures were performed,including the rebleeding rate,short-term efficacy,long-term efficacy,mortality,and excellent and good rate.Results:The incidence of complication such as rebleeding etc had no significantly difference in the four groups.The excellent and good rates of clinical outcomes at 3 months were the<6 h group>6-12 h group,and 12-18 h group>18-24 h group(P<0.05).The 18-24 h group had the highest mortality(30%,3/10).Conclusions:Within 6 h after the onset of hypertensive intracerebral hemorrhage was the best opportunity for the minimal invasive puncture.