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In order to solve the problem of RFID tags collision in the current logistics system. Based on the study of existing anti-collision algorithms, a grouped dynamic frame slot with query tree (GDQT) algorithm was designed for a large number of labeling scenarios in logistics management. The GDQT algorithm first estimates the number of tags that have not been identified after each round of identification by the tag estimation algorithm, if less than or equal to 354, the tags were first identified using the dynamic frame slot ALOHA (DFSA) algorithm., and then using the query tree algorithm (QT) for the remaining tags identification. If the number of unrecognized tags was greater than 354, the tags should be first grouped, and then DFSA and QT would be used for tags identification. The simulation results showed that GDQT algorithm can improve system throughput rate and keep throughput rate at around 0.82, which is 300%, 120%, 50% higher than the DFSA algorithm, GDFSA algorithm and AHT algorithm respectively. Therefore, The GDQT algorithm has a good application prospect in the logistics system.

Objective To clarify and quantify risk factors among local characteristics of the foot for major amputation in diabetic foot patients. Methods Articles published before January 2018 on PubMed and Embase were conducted observational studies about risk factors for major amputation in patients with diabetic foot were retrieved and systematically reviewed by using Stata 12.0 statistical software. Results A total of 4668 major amputees and 65 831 controls were reported in 18 observational studies. Across the studies, the overall odds ratios (ORs) and 95% confidence intervals (CIs) of significant risk factors are ulcer reaching bone (OR, 11.796; 95% CI, 6.905-20.152), gangrene (OR, 6.487; 95% CI, 4.088-10.293), hindfoot position (OR, 3.913; 95% CI, 2.254-6.795), decreased ankle-brachial index (ABI) (OR, 2.522; 95% CI, 1.805-3.523), infection (OR, 2.516; 95% CI, 1.708-3.706), peripheral arterial disease (PAD) (OR, 2.114; 95% CI, 1.326-3.372). While there is no significant difference in the size of the ulcer, neuropathy, Charcot foot, osteomyelitis and intermittent claudication (OR, 1.15; 95% CI, 0.85-1.54). Conclusion Factors among local characteristics of the foot associated with major amputation in patients with diabetic foot are the ulcer reaching bone, gangrene, hindfoot position, decreased ABI, infection, and PAD, a negative risk factor for the risk of amputation. Further studies are required to provide more details of foot local characteristics.

This study explored the association between the CYP2C9*3/CYP2D6*10/CYP3A5*3 genetic polymorphisms with lower extremity deep venous thrombosis (LEDVT) and the warfarin maintenance dose.Five hundred thirty-six patients who were pathologically diagnosed with LEDVT after surgery were included in the LEDVT group. At the same time, 540 patients without LEDVT who underwent surgery were recruited as the control group. Patients were given warfarin at an initial dose of 2.5-3.0 mg. Blood samples were collected to detect the initial and stable international normalized ratio (INR) values. The warfarin maintenance dose was obtained if the INR remained within a range of 2.0-3.0 for 3 consecutive days. The genotype distribution and haplotype analysis of the CYP2C9*3/CYP2D6*10/CYP3A5*3 alleles were analyzed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) testing and SHEsis software, respectively. Logistic regression analysis was used to analyze the risk and protective factors for LEDVT.The A/G genotypes, G/G genotypes, and G allele of CYP3A5*3 in the LEDVT group were observed with increased frequency compared with the control group. The LEDVT group displayed a higher ACG haplotype frequency, and lower ACA and ATA haplotype frequencies than the control group. Age, diabetes, low-density lipoprotein, CYP3A5*3 and the ACG haplotype were independent risk factors for LEDVT. High-density lipoprotein and the ACA haplotype were independent protective factors for LEDVT. The genotype distributions of the CYP2C9*3, CYP2D6*10, and CYP3A5*3 genetic polymorphisms were associated with the warfarin maintenance dose.The CYP3A5*3 genetic polymorphism may be an important risk factor for LEDVT. Moreover, CYP2C9*3, CYP2D6*10, and CYP3A5*3 are associated with the warfarin maintenance dose.

One-step process of poly(styrene-co-maleic acid)(PS-PMA) nanofibers/QCM combination system was proposed as a novel ammonia detection in this study. Nano-sized PS-PMA fibers were deposited on the QCM electrodes via electrospinning technique directly, which can retain the original high specific surface area of PS-PMA nanofibers, and simplify NH3detection process significantly. Experimental results showed that this new PS-PMA nanofibers/QCM sensor exhibited excellent ammonia sensing performances, such as rapid response and good reproducibility. Moreover, the carboxyl content on the surface of PS-PMA membranes was also determined as well as the specific surface area in order to study the structure-properties relationships.

Natural dye extracted from Pu-erh tea was applied to tencel fabric. The factors of pH values, temperature, dye concentration and dyeing time on dyeing performance of tencel fabric dyed with Pu-erh tea dyestuff were discussed. The color depth of tencel fabric was investigated on Data Color matching system in terms of k/s values. The optimal dyeing results were obtained at 45°C, pH 3.5, and dye concentration 0.66% owf for 10min. To improve the color depth of tencel fabric dyeing with tea dyes, the meta-mordanting (ferrous sulfate) was added in the dyeing process and the optimal meta-mordanting time for tencel fabric is 45 min.

The dyeing behavior of dew-retted linen fabrics modified with urea was analyzed. The effects of processing conditions, such as concentration of urea, modification time, and modification temperature on the dyeing performance of dew-retted linen were investigated. The surface morphology of linen fiber was observed by stereoscopic microscope. The breaking strength of linen fabrics was measured by fabric strength tester. The k/s value was tested by spectrophotometer. The results show that, the dyeing performance of the modified linen was greatly improved, but its breaking strength was decreased and the morphology of linen fiber became roughly. Meanwhile, the optimal process conditions were obtained, i.e. the concentration of urea was 150 g/L, the modification temperature at 160°C, and modification time for 6 min.