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To compare minimally invasive and traditional Chevron osteotomy in treating patients with mild to moderate hallux valgus.Clinical data of 36 patients (36 feet) with mild to moderate hallux valgus from January 2019 to February 2021 were retrospectively analyzed, and divided into minimally invasive osteotomy(minimally invasive group) and traditional Chevron osteotomy(traditional group). There were 16 patients in minimally invasive group, including 1 male and 15 females, aged from 36 to 60 years old with an average of(49.0±9.5) years old;9 were mild and 7 were moderate according to Mann classification;treated with minimally invasive osteotomy with hollow screw fixation. There were 20 patients(20 feet) in traditional group, including 2 males and 18 females, aged from 38 to 65 years old with an average of(50.0±9.2) years old;11 were mild and 9 were moderate according to Mann classification;treated with traditional Chevron osteotomy. Hallux valgus angle (HVA), intermetatarsal angle (IMA) before and after operation at 12 months bewteen two groups were observed and compared, and American Orthopedic Foot and Ankle Society (AOFAS) forefoot score and visual analogue scale (VAS) before and after operation at 6 weeks and 12 months between two groups were compared.Thirty-six patiens were followed up from 14 to 30 months with an average of (21.00±5.77) months. All incisions were healed well at stageⅠwithout infection. There were no significant differences in HVA, IMA, AOFAS forefoot scores and VAS before and after operation at 12 months between two groups(Compared with traditional Chevron osteotomy, minimally invasive osteotomy has less trauma and quicker recovery. Both of them has similar clinical effects, and could receive satisfactory clinical effects, while treatment of minimally invasive osteotomy should pain attention to learning curve.

The expert consensus of the third-generation minimally invasive technical specification for hallux valgus was developed by Foot and Ankle Committee of Orthopaedic Branch of Chinese Medical Doctor Association, Foot and Ankle Committee of Sports Medicine Branch of Chinese Medical Doctor Association, and Foot and Ankle Expert Committee of Orthopedic Branch of Chinese Association of Integrative Medicine. The consensus was drawn from evidence-based medicine and experts' clinical experience to provide an academic guidance of the third-generation minimally invasive technical specification of hallux valgus for the orthopedic surgeons, including definition, indications, osteotomy techniques, post-operative rehabilitation and prognosis.

Objective: To investigate the effect of low-frequency rTMS combined with fasudil on neurological function in patients with acute cerebral infarction and its mechanism. Method:120 patients with acute cerebral infarction admitted from January 2016 to January 2019 were randomly divided into four groups: control group (n = 30), fasudil group (n = 30), rTMS group (n = 30), fasudil + rTMS group (n = 30). The changes of NIHSS score, ADL score, serum GAP- 43, serum RhoA and serum ROCK-II were observed and recorded before and after treatment. Results: The ADL scores and serum GAP-43 levels of the four groups after treatment were higher than those before treatment (P < 0.05); the NIHSS scores, serum RhoA and serum ROCK-II levels of the four groups after treatment were lower than those before treatment (P < 0.05); After treatment, ADL score and serum GAP-43 level in fasudil+rTMS group were higher than those in other three groups (P < 0.05); After treatment, NIHSS score, serum RhoA and serum ROCK-II levels in fasudil+rTMS group were lower than those in other three groups (P < 0.05). After treatment, NIHSS score was positively correlated with RhoA and ROCK-II content, negatively correlated with GAP-43 content and ADL score. Conclusions: Low-frequency rTMS combined with fasudil in the treatment of acute cerebral infarction can significantly improve neurological deficits, improve daily living ability, promote axonal remodeling and regeneration. It may be one of its mechanisms by increasing the expression of GAP-43 in serum and reducing the expression levels of RhoA and ROCK-II in serum. It has high clinical value.

This experiment was conducted to investigate the effect of dietary calcium (Ca) or phosphorus (P) deficiency on bone development and related Ca or P metabolic utilization parameters of broilers from 22 to 42 days of age based on our previous study, which indicated that dietary Ca or P deficiency impaired the bone development by regulating related Ca or P metabolic utilization parameters of broilers from 1 to 21 days of age. A total of 504 one-day-old Arbor Acres male broilers were randomly assigned to 1 of 4 treatments with 7 replicates in a completely randomized design, and fed the normal control and Ca- or P-deficient diets from 1 to 21 days of age. At 22 days of age, the broilers were further fed the normal control diet (0.90% Ca+0.35% non-phytate P (NPP)), the P-deficient diet (0.90% Ca+0.18% NPP), the Ca-deficient diet (0.30% Ca+0.35% NPP) or the Ca and P-deficient diet (0.30% Ca+0.18% NPP), respectively. The results showed that dietary Ca or P deficiency decreased (P

The gut microbiota play an important role in the growth and intestinal health of broilers. The present study was to investigate the gut microbiota, short-chain fatty acids, and intestinal morphology of broilers at different ages. A total of 320 one-day-old male broilers were raised in 8 replicates and fed the same corn–soybean diets for 42 D. The duodenal, jejunal, and ileal segments and their and cecal microbiota were collected on day 1, 7, 14, 21, and 42, respectively. The villous height (VH), crypt depth (CD), and their ratio of VH:CD in the duodenum, jejunum, and ileum all increased (P

ILFObjective: To investigate the clinical effect of ultra-low frequency repetitive transcranial magnetic stimulation on dysphagia in elderly patients with acute cerebral infarction and its impact on quality of life. Methods: 60 elderly patients with dysphagia caused by acute cerebral infarction were randomly divided into rTMS group and control group, 30 cases in each group. Both groups received routine drug therapy and swallowing function training. rTMS group was additionally treated by ultra-low frequency (10mHZ) repetitive transcranial magnetic stimulation for 14 days. The changes of NIHSS score and ADL score and NSE serum level and Wa Tian drinking water experiment and Fujishima Ichiro dysphagia scale score and SWAL-QOL score and SF-36 score were observed between the two groups before and after treatment.The clinical effect was evaluated by Wa Tian drinking water experiment. Results: After treatment, The clinical effective rate in rTMS group was significantly higher compared with that in the control group (P < 0.05), NIHSS score and serum NSE level were significantly lower compared with the control group (P < 0.05), ADL score and Fujishima Ichiro dysphagia score and SWAL-QOL score and SF-36 scores were significantly higher compared with the control group (P < 0.05). After treatment, SF-36 total score(or SWAL-QOL Score ) was negatively correlated with NSE serum level and NIHSS score, which was positively correlated with ADL score and Fujishima Ichiro dysphagia scale score score. Conclusion: Ultra-low frequency rTMS therapy can reduce NSE level, effectively improve dysphagia in elderly patients with acute cerebral infarction and significantly improve the elderly patients' life quality.

Background The current calcium (Ca) recommendation for broilers is primarily based on studies conducted more than 30 years ago with birds of markedly different productive potentials from those which exist today. And the response indicators in these studies are mainly growth performance and bone ash percentage. Therefore, the present study was carried out to investigate the effect of dietary Ca level on growth performance, serum parameters, bone characteristics and Ca metabolism-related gene expressions, so as to estimate dietary Ca requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 d of age. Methods A total of 420 1-day-old Arbor Acres male broilers were randomly assigned to 1 of 7 treatments with 6 replicates (10 birds per cage) and fed the corn-soybean meal diets containing 0.60, 0.70, 0.80, 0.90, 1.00, 1.10 or 1.20% Ca for 21days. Each diet contained the constant non-phytate phosphorus content of about 0.39%. Results The average daily gain decreased linearly (P P P P

Cinnamon essential oil (CEO) and its combination with bamboo leaf flavonoid (BLF) have been shown to exhibit an additive antibacterial effect in vitro, but their functions in broilers were not clear. An experiment was conducted to investigate the effects of dietary graded levels of CEO and its combination with BLF on the growth performance, immune responses, antioxidative ability, and intestinal morphology and microbiota of broilers fed a corn-soybean meal basal diet. A total of 576 1-d-old Arbor Acres commercial male broilers were randomly allotted to 9 treatments with 8 replicates of 8 birds each in a completely randomized design. Birds were fed on a basal corn-soybean meal diet (control, without plant extracts and antibiotics), or the basal diet supplemented with 50 mg of aureomycin kg−1, 50, 100, 200, 400, or 800 mg of CEO kg−1, a combination of 100 mg of CEO and 16.7 mg of BLF kg−1, or a combination of 200 mg of CEO kg−1 and 33.3 mg of BLF kg−1 for 42 d. Dietary treatment affected (P0.16) on all other measured indices. The addition of 400 mg of CEO kg−1 or a combination of 200 mg CEO kg−1 and 33.3 mg BLF kg−1 increased (P

The AgI/2D-La2Ti2O7 hybrids were obtained via a facile method at room temperature. Rhodamine B, as an organic dye, was used to determine the photocatalytic activity of the samples. The photocatalytic degradation mechanism was also analyzed. Experimental results display that AgI can broaden the light absorption of La2Ti2O7 under the visible light irradiation. The photocatalytic degradation efficiency of the as-synthesized hybrids appears the tendency of first increasing and then decreasing with increasing the usage of La2Ti2O7. When the usage of La2Ti2O7 is 10%, within 60 min, the as-synthesized hybrids possess the maximum of 93.1%. This is higher than 2.1% of La2Ti2O7 and 80.9% of AgI. Moreover, the improved photocatalytic activity can be attributed to AgI particles conjugating with 2D-La2Ti2O7 nanosheets via chemical-bonds, which can enhance the separation and transformation of the photo-generated holes and electrons. In addition, the dominating role is superoxide radicals during the photocatalytic process.

The fluctuation behaviors of a gene transcriptional regulatory system subjected to the cross-correlated noises are investigated. Based on the approximate Fokker–Planck Equation, the analytic expressions of the associate relaxation time and the correlation function of a gene transcriptional regulatory system are obtained by means of projection operator method. The results show that the noise parameters exhibit different effects on the fluctuation behaviors of this system, and can produce the critical behaviors in the relaxation time as functions of the multiplicative noise intensity D , the additive noise intensity α and the cross-correlated noise intensity λ . That is, the relaxation time decreases below the critical value of λ , and above the critical value of D and α . The rate of fluctuation decay of concentration state of TF-A is speeded up, the stability of this system is enhanced. However, above the critical value of λ , and below the critical values of D and α , the relaxation time first increases, reaches a maximum, and then decreases. The rate of fluctuation decay of concentration state of TF-A is slowed down firstly, and then, is enhanced. On the other hand, the effects of noise parameters on the correlation function show that λ and α weaken the related activity between two states at different time, and enhances the stability of the system in the steady state. In contrast, D enhances the related activity between two states at different time, and weakens the stability. The numerical results are in basic agreement with the theoretical predictions.

Purpose: This study was conducted to investigate the relation of HP infection to peripheral arterial stiffness and 10-year cardiovascular risk in diabetes mellitus (DM). Methods: DM subjects who underwent the C13-breath test were enrolled and divided into DMHP+ and DMHP− groups. Peripheral arterial stiffness was measured using brachial to ankle pulse wave velocity (baPWV). Framingham score (FRS) and Chinese evaluation method of ischemic cardiovascular diseases (ICVD) were used to clarify 10-year cardiovascular risk. Results: A total of 6767 subjects were included, baPWV and proportion of subjects with severe peripheral arterial stiffness were lower in DMHP− group than DMHP+ group (1556.68 ± 227.54 vs 2031.61 ± 525.48 cm/s, p

In nonlinear optics, different forms of soliton propagation can be described by nonlinear Schrodinger equation. The purpose of this paper is to find and classify all exact solutions of a class of Schrodinger equation in quadratic-cubic nonlinear medium according to the quartic polynomial discriminant system and trial equation method. These solutions contain the partial solutions obtained by predecessors with different algorithms. The complete discriminant system of quartic polynomials is modified, and the eight families of exact solutions show various properties of patterns of amplitudes including singularity, periodicity and double periodicity.

In this paper, the classification of all envelope traveling wave solutions of Gerdjikov–Ivanov model with full nonlinearity is obtained by using complete discriminant system for polynomial method and trial equation method. All the results show that the Gerdjikov–Ivanov model has abundant traveling wave solutions, including isolated solutions, periodic solutions, rational singular solutions, double periodic continuous solutions and discontinuous solutions. Among them, some new solutions are obtained.

AIM To investigate the intestinal luminal microbiota (LM) and mucosa-associated microbiota (MAM) in Chinese patients with functional gastrointestinal disorders (FGIDs) and examine the association between these communities and the expression of toll-like receptor (TLR) 2 and TLR4. METHODS Thirty-two Chinese subjects who suffered from symptoms of FGIDs, as confirmed by gastroenterologists, were enrolled in this study. Fresh faecal samples and descending colonic mucosal biopsies were collected from the subjects before (faecal) and during (mucosal) flexible colonoscopy. For analysis of the samples, we performed high-throughput sequencing of the V3-V4 region of the 16S rRNA gene and reverse transcription (RT)-PCR to detect the expression of colonic TLR2 and TLR4. Differences in the stool and mucosal microbiota were examined and a correlation network analysis was performed. RESULTS The microbiota of faecal samples was significantly more diverse and richer than that of the mucosal samples, and the LM and MAM populations differed significantly. TLR2 expression showed a significant positive correlation with TLR4 expression. In the MAM samples, the genera Faecalibacterium and Ruminococcus, which belong to the family Ruminococcaceae, were inversely correlated with TLR4 expression (r = -0.45817, P = 0.0083 and r = -0.5306, P = 0.0018, respectively). Granulicatella, which belongs to Carnobacteriaceae, and Streptococcus, which belongs to Streptococcaceae, were inversely correlated with TLR2 expression (r = -0.5573, P = 0.0010 and r = -0.5435, P = 0.0013, respectively). In the LM samples, examination at phylum, class, or order level revealed no correlation with TLR4 expression. Faecalibacterium, which belongs to Ruminococcaceae, and Streptococcus, which belongs to Streptococcaceae, were inversely correlated with TLR2 expression (r = -0.5743, P = 0.0058 and r = -0.3905, P = 0.0271, respectively). CONCLUSION Microbial compositions of LM and MAM in Chinese patients with FGIDs are different. Expression of TLRs may be affected by the type of bacteria that are present in the gut.

In this work, a ternary magnetic composite of Fe3O4@TiO2/SiO2 aerogel with good photocatalytic activity was prepared successfully by combining sol–gel and simple hydrothermal methods with Fe3O4@TiO2 core–shell microspheres and SiO2 aerogels from industrial fly ash as starting materials. The structural and magnetic features of the as-obtained Fe3O4@TiO2/SiO2 aerogel composite were investigated by powder X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), transmission electron microscopy (TEM), N2 adsorption–desorption measurements, UV–vis diffuse reflectance spectra (UV–vis/DRS) and vibrating sample magnetometry (VSM). The results showed that Fe3O4@TiO2 core–shell microspheres were dispersed on the surface of SiO2 aerogels. The Fe3O4@TiO2/SiO2 aerogel composite material possessed excellent magnetic properties at room temperature, high adsorption capacity to organic pollutants, enhanced charge separation efficiency and strong light absorption in the visible region. The photocatalytic activity of the prepared Fe3O4@TiO2/SiO2 aerogel for Rhodamine B degradation under visible light irradiation was systematically investigated by varying the operational parameters such as pH value, catalyst concentration, irradiation time, and initial substrate concentration, etc. The photocatalytic reactions obeyed pseudo-first-order kinetics according to Langmuir–Hinshelwood model. The repeatability of photocatalytic activity was also tested. Compared to pure TiO2 and Fe3O4@TiO2 core–shell microspheres, the ternary composite of Fe3O4@TiO2/SiO2 aerogel showed higher photocatalytic activity for Rhodamine B degradation, which meant that this material can serve as an efficient and recyclable multifunctional photocatalyst for the degradation of hazardous organic dyes in wastewater.

Purpose: This study was conducted to investigate the relation of HP infection to peripheral arterial stiffness and 10-year cardiovascular risk in diabetes mellitus (DM). Methods: DM subjects who underwent the C13-breath test were enrolled and divided into DMHP+ and DMHP− groups. Peripheral arterial stiffness was measured using brachial to ankle pulse wave velocity (baPWV). Framingham score (FRS) and Chinese evaluation method of ischemic cardiovascular diseases (ICVD) were used to clarify 10-year cardiovascular risk. Results: A total of 6767 subjects were included, baPWV and proportion of subjects with severe peripheral arterial stiffness were lower in DMHP− group than DMHP+ group (1556.68 ± 227.54 vs 2031.61 ± 525.48 cm/s, p Conclusion: DM subjects with HP infection had more severe peripheral arterial stiffness compared those without HP infection, a higher cardiovascular risk score and 10-year cardiovascular risk stratification were observed in those subjects.

Elderly individuals with non-dipper hypertension are at high risk of cardiovascular disease because of increased stiffness of peripheral arteries. Since, vitamin D deficiency is prevalent in elderly Chinese. We examined whether reduced plasma levels of 25-hydroxyvitamin D [25(OH)D] may help promote this stiffness. Hypertensive patients at least 60 years old without history of peripheral arterial disease at our hospital were retrospectively divided into dipper and non-dipper groups according to the results of 24-hour ambulatory blood pressure monitoring. Plasma levels of 25(OH)D were measured by enzyme immunoassay. Peripheral arterial stiffness was measured based on the cardio-ankle vascular index (CAVI). Of the 155 patients enrolled, 95 (61.3%) were diagnosed with non-dipper hypertension and these patients had significantly lower plasma levels of 25(OH)D than the 60 patients with dipper hypertension (19.58 ± 5.97 vs 24.36 ± 6.95 nmol/L, P

We did an experimental study on ammonia absorption in a spray tower. The kinetic characteristics of droplets were investigated by considering the forces acting on a droplet. The gas-phase mass transfer coefficient was deduced with the Colburn analogy method. A simplified model for predicting NH3 capture with a spray tower has been presented based on mass transfer and ionic equilibrium, which was successfully validated against experimental data. The influences and the sensitivity analysis of main operating parameters on the absorption efficiency were analyzed. As the most sensitive parameter, the mean droplet diameter was obtained by fitting experimental data with an empirical correlation. The distributions of two typical process parameters along the absorber were also simulated. Decreasing the pH value of absorbent is an effective but restrictive way to strengthen the mass transfer rate on account of insufficient liquid-side resistance.

A low carbon bainitic steel YP960 for construction machinery was designed by directly quenching and tempering (DQ&T), and the mechanism for tempering temperature on tensile behavior was studied. A modified Voce relation was established using the experimental results to describe the stress–strain relationship of the as-quenched and as-tempered specimens, and quantitative model parameters for flow curve have been derived and discussed taking account into the evolution of precipitations and dislocation cell during temper. The reliability of the model was verified by a comparison between the predicted flow stress curves from the model and the experimental data. When tempering temperature is 823 K, the “hard regions” and “soft regions” form as a result of inhomogeneous recovery. With the help of Crussard–Jaoul (C–J) analysis, the cooperative deformation relationship between softer regions and harder regions was studied, which was confirmed by EBSD and TEM analysis. The cooperative deformation between softer regions and harder regions can reduce stress concentration and improve the uniform elongation of low carbon bainitic YP960 steels.

Medical images registration technique is important to the modern clinical medicine. A registration algorithm of medical images is proposed in the paper. The algorithm consists of two part, i.e. the rough registration and the fine registration. In the rough registration procedure, the contour lines of the couple medical images are obtained at first, then they are resampled to obtain fewer contour feature points. The rough registration is accomplished based on the resampled contour lines and the Principal Axes method. In the fine registration procedure, the simplified multiwavelet transform is used to obtain the couple images multiscale information at first, then part of high-frequency coefficients are selected as registration objects. In addition, the selected high-frequency sub-bands are filtered by their mathematical expectation, and hierarchical registration strategy is used in the registration process. The experiment results show that the proposed registration algorithm is an effect method, not only the registrations precision can be held, but also the calculation cost is reduced.

In clinical application, medical images tend to be low contrast, bigger or more speckle noise, and they will affect the effective use of medical images. Medical image enhancement can solve the problem of the low contrast of the image, so as to get more clear details of images. An algorithm of the medical image enhancement is proposed based on the binary wavelet transform in the paper. Firstly, the medical image was carried through dyadic wavelet transform, then the high-frequency information was de-noised, and then to enhance the high frequency information which was de-noised; at last, the enhanced high-frequency sub-images and the low-frequency sub-images were reconstructed by inverse dyadic wavelet transform. Finally, a better visual effect can be got by a subsection grayscale transform. The experiment results show the enhanced effect of proposed method is better than those of the wavelet transform.

Medical image registration is the important technique in the clinical medicine field. A novel hierarchical registration method of the medical images based on multiscale information and contour line is proposed in the paper. At First, contour lines of the couple images are extracted based on the edge features obtained by Canny operator, and contour lines of the couple images are resample in order to reduce the calculation cost in the registration process. Secondly, the Principal Axes method is used to accomplish the rough registration based on the resampled contour lines. Thirdly, multiscale image serials obtained by down-sample transform are used to accomplish the couple images fine registration. Experiment results show that the method not only can achieve more accurate registration results, but also can reduce the computational time greatly. The accurate registration results also can be achieved in the noisy environment.

A novel medical image retrieval method based on Simplified Multi-wavelet Transform and Shape Feature was proposed in the paper, which included coarse and fine retrieval procedure. In the procedure of the coarse retrieval, Canny operator was used to extract edges of images. Moreover, contour lines were obtained by using the method of scan lines. At last, the coarse retrieval results of the images can be accomplished by using contour lines of images. In the procedure of the fine retrieval, the simplified multi-wavelet transform was used to decompose images at first, then, only the high frequency coefficients in the vertical directions were selected as retrieval objects. And hierarchical retrieval strategy was selected to accomplish the fine retrieval. This method not only can reduce the computational complexity effectively, but also can make full use of high frequency information of original images. Experiments showed that the accuracy of the retrieved results can be ensured.

The oxidative stability of castor oil based biodiesel, added different antioxidant, was studied systematacially through pressure differential scanning calorimetry (PDSC), accelerated oxidation test, constant temperature method, programmed temperature method. The result shows after adding antioxidant in castor oil, the generation of hyperoxide and acid value were suffocated for the biodiesel. When the content of antioxidant 300 was 0.6 wt.%, the initiation oxide temperature raised to 197.7°C, the acid value reduced to 1.41, the solubility of oxide reduced to 1.40mg/100mL, and the activity energy of oxidation was 48.18kJ/mol.

Linear polyvinyl alcohol ( PVA ) as the matrix, Glutaraldehyde as crosslinking agent, the crosslinked polyvinyl alcohol microspheres ( CPVA ) was prepared by inverse microemulsion polymerization. Influence factors for forms and particle size of crosslinking spheres such as the ratio of oil and water, reaction temperature and time, crosslinking agent and catalyst use level, stirring speed. When reaction conditions changed, the particle size would change accordingly.

In order to construct a certain standard structure MRI (Magnetic resonance imaging) image library by extracting and collating unstructured literature data information, an identification method of the image and text information fusion is proposed. The method makes use of PHOW (Pyramid Histogram Of Words) to represent image features, combines with the word frequency characteristics of the embedded icon note (text), and then uses posterior multiplication fusion method to complete the classification and identification of the online biological literature MRI image. The experimental results show that this method has better correct recognition rate and better recognition performance than feature identification method only based on PHOW or text. The study can offer use for reference to construct other structured professional database from online literature.

The intestinal microbiota is associated with human health. The luminal microbiota (LM) and mucosa-associated microbiota (MAM) are distinct ecosystems with different metabolic and immunological functions. Several studies have examined the correlations between the gut microbiota and clinical indices, but few have investigated the relationships between the microbiota and mucosal proteins. We characterized the intestinal LM and MAM in Chinese people and examined the association between these communities and the expression of mucosal proteins. Fresh fecal samples and distal colonic mucosal biopsies were collected from 32 subjects before (fecal) and during (mucosal) flexible sigmoidoscopy. We used high-throughput sequencing targeting the 16SrRNA gene V3–V4 region to analyze the samples and reverse transcription(RT)–PCR to detect the expression of colonic proteins BDNF, ZO1, TLR2, TLR4, AQP3, and AQP8. Differences in the stool and mucosal microbiota were identified and a correlation network analysis performed. The LM and MAM populations differed significantly. In LM, the microbiota composition correlated significantly positively with host age, and Firmicutes (phylum) correlated positively with body mass index (BMI), but inversely with ZO1.At the genus level, systemic indices, such as age, BMI, and BDNF, correlated predominantly with LM, whereas systemic and local indices, such as TLR2, correlated with both MAM and LM. ZO1 and TLR4 which usually exert a local effect, mainly correlated with MAM. Different bacteria were associated with the expression of different proteins. Our data suggest that The microbial compositions of LM and MAM differed. Different gut bacteria may play different roles by regulating the expression of different proteins.

OBJECTIVE: To study and compare the clinical outcomes of open reduction and internal fixation via extensile L‐shape incision and limited open reduction via the sinus tarsi approach using the medial distraction technique for intra‐articular calcaneal fractures. METHODS: We performed a retrospective review of 65 intra‐articular calcaneal fractures treated operatively between March 2012 and February 2015. Patients were divided into two groups: 28 were in the sinus tarsi approach group and 37 were in the extensile lateral approach group. All patients were asked to return for a research visit that included radiography and clinical evaluation. The postoperative function was evaluated using the ankle and hindfoot score of the American Orthopaedic Foot and Ankle Society (AOFAS) and the visual analogue scale (VAS). RESULTS: No significant difference was found in demographics between the two groups. The corrected value of the calcaneal varus angle between the two groups is statistically significant (P < 0.05). The overall wound complication rate was 3.6% in the minimally invasive group versus 13.5% in the extensile group. Four patients in the extensile lateral approach group had developed hindfoot varus deformity at last follow‐up. At the last follow‐up, the average AOFAS ankle and the hindfoot score of the minimal group was 88.4 ± 6.6, and the VAS score was 1.9 ± 0.7, while that of the extensile lateral approach group was 83.2 ± 5.6 and 2.3 ± 1.0, respectively. CONCLUSION: Limited open reduction via the sinus tarsi approach for intra‐articular calcaneal fractures could reduce the incidence of wound complications effectively, and the medial distraction technique is helpful for correcting the calcaneus varus deformity.

Material transfer characteristics and surface morphology of contact material reflects their electrical erosion performance. In this paper, by using a JF04C contact material testing machine, the characteristics of electrical erosion of PtIr contact materials are acquired under low voltage, resistive load and small current. By means of an electronic balance and SEM, the material transfer values of the PtIr contact materials and the characteristics of contact material surface profile are obtained and analyzed. The results show that PtIr alloy contact materials mainly transfer from cathode to anode and its breaking arcs are metallic phase.

Based on the overburden three caving feature, the deformation of mining rock process was devided and the criterion of gradual transformation of each stages deformation were given. Then , combined the thin-plate theory, the differential models were derived for rock deformation in level and similar to level bured condition. The boundary condition of each models and exchange condition between different models were put forward and the gradual mechanics model was set up.The subsidence model before roof collapse was solved by Navier double trigonometric series and the deflection surface expression of rock deformation was put forword. At last, the reliability and practicality of the models was verified by engineering examples.

By the in situ compatibilization, PP/POE blends were prepared with dicumyl peroxide (DCP) as initiator, Trimethylolpropane triacrylate (TMPTA) as co-during systems and the metallocene polyolef in elastomers ploy (ethylene-1-octene) (POE) as toughening rubber. The effects of additive amount for TMPTA、POE on the mechanical properties were studied. The results showed that the maximum value of the room-temperature and low-temperature impact strength for the composite was reached to 52.03KJ/m2 and 37.29KJ/m2, and the elongationfor was reached to 482.74%.