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BACKGROUND: The proximal femoral nail antirotation is the preferred treatment for reverse osteoporotic intertrochanteric fractures. Bone cement enhancement can reduce the probability of proximal femoral nail antirotation cut-out and cut-through, but there are no relevant biomechanical studies demonstrating the effect of bone cement content and location on the stress and displacement of the fracture end. OBJECTIVE: To investigate the effects of different contents and locations of bone cement in cement-reinforced proximal femoral nail antirotation on stress, strain, and displacement of reverse osteoporotic femoral intertrochanteric fractures in the elderly by finite element analysis. METHODS: A healthy adult female right femur model was extracted by Mimics software and smoothed in Geometric software. Five types of internal fixation methods of proximal femoral nail antirotation (cementless, cephalic spherical 1 mL, cephalic spherical 2 mL, cephalic spherical 3.4 mL, and cylindrical 5 mL around spiral blade) and femoral intertrochanteric fracture (AO subtype 31-A3.1 type) model were established in Solidworks software. After assembly, the total stress distribution, peak stress and displacement of the five models of implants with the femur were compared in Ansys software. RESULTS AND CONCLUSION: (1) The peak stresses of proximal femoral nail antirotation with head-end spherical 1 mL, head-end spherical 2 mL, head-end spherical 3.4 mL, and cylindrical 5 mL enhanced proximal femoral nail antirotation around the spiral blade respectively were 571.07 MPa (located at the junction of the spiral blade and the main nail), 495.45 MPa (located at the junction of the spiral blade and the main nail), 467.20 MPa (located at the junction of the main nail and the distal screw connection), 642.70 MPa (located at the junction of the main nail and distal screw connection), and 458.58 MPa (located at the junction of the spiral blade and the main nail). (2) The maximum displacements of proximal femoral nail antirotation with head end sphere 1 mL, head end sphere 2 mL, head end sphere 3.4 mL, and with cylindrical 5 mL enhancement around the spiral blade were 9.260 5, 7.589 1, 7.316 8, 6.790 7, and 6.615 7 mm, respectively, all of which were located at the proximal end of the femoral head. (3) These findings revealed that for reverse femoral intertrochanteric fractures treated with proximal femoral nail antirotation, the bone cement enhancement had significant mechanical stability compared with no enhancement, and the enhancement of the spiral blade 5 mL around the perimeter was the best, which is more preferable for aged unstable intertrochanteric fractures. [ABSTRACT FROM AUTHOR]

Objective To investigate the depressive symptoms and risk factors among frontline workers in the secondary industry in Tongling City in order to provide a basis for the prevention of psychological problems among occupational populations in Tongling City. Methods By convenience sampling method, 389 frontline workers from 9 enterprises in the secondary industry, namely non -metal mining and dressing industry, rubber and plastic products industry, metal mineral products industry, and textile and garment enterprises, in Tongling City from July to September 2022 were anonymously surveyed with the Monitoring and Intervention Questionnaire for Occupational Health Literacy of Key Populations developed by the Chinese Center for Disease Control and Prevention. Multivariable logistic regression models were used to analyze the risk factors for depressive symptoms among these workers. Results The prevalence of depressive symptoms among 389 frontline workers in the secondary industry was 14.40%, while 123 individuals (31.62% ) had sleep disturbances. Multivariable logistic regression analysis showed that for every 1-year increase in the age of workers, the risk of abnormal depressive symptoms increased by 1.04 times (95%CI: 1.01-1.07); compared with workers with weekly working hours ≤ 40 h, those with weekly working hours > 48 h had an increased risk of abnormal depressive symptoms by 4.29 times (95% CI: 1.44 -12.78); compared with workers without anxiety, those with anxiety had an increased risk of abnormal depressive symptoms by 10.49 times (95% CI: 5.52 -19.94). Marital status, education level, monthly income, enterprise character, industry type, and the presence or absence of sleep disturbances were not risk factors for depressive symptoms among these workers. Conclusions Frontline workers with longer weekly working hours, specifically in labor -intensive enterprises with assembly line operations, were prone to having depressive symptoms. The enterprises should pay attention to older employees and those with longer working hours, improve organizational management systems, arrange working hours scientifically and rationally, and reduce the occurrence of anxiety and depressive symptoms among employees. [ABSTRACT FROM AUTHOR]

Objective To provide evidence for clinical safety of risperidone based on the FAERS database. Methods Adverse event reports for lurasidone as a suspected drug were collected from the FAERS database for 15 quarters from January 1,2020,to March 31,2023. After standardizing the adverse drug reaction terms, the proportional reporting ratio (PRR) and the reporting odds ratio (ROR) methods were used for signal detection of adverse reactions. Results A total of 11 168 case reports of adverse reactions to lurasidone were extracted from the FAERS database, most of which were male patients (7 525,67. 38%). The age group with the highest distribution was 18-＜45 years old (2 302,20. 61%). The majority of adverse events occurred within 0-30 days of drug administration, with 1453 cases accounting for 13. 01% of the total. In the detection of adverse reactions using the ROR and PRR methods, a total of 526 signals were detected, with the highest number of signals being related to the nervous system (112). Conclusion The use of lurasidone is associated with the occurrence of severe adverse reactions, especially prolonged hospitalization. Metabolic disorders caused by lurasidone, such as obesity and hyperprolactinemia, have a high signal, and caution should be exercised for the occurrence of these adverse reactions during clinical use. [ABSTRACT FROM AUTHOR]

To achieve the goal of 'Net-zero Europe' by 2050, the European Union (EU) has set up detailed policies in the fields of energy and climate. This paper summarizes the main characteristics of relevant policies in the EU and UK and their implications for China by reviewing these policies in the achievement of the carbon neutrality goal and other goals in the energy and climate fields. The characteristics of these energy and climate policies include: ① Top-down and bottom-up approaches are adopted to distribute the EU' s overall emission reduction targets to member states in accordance with the principle of fairness, and each member state formulates and adjusts its own goals to ensure the realization of the overall goals. ② Detailed transition plans are formulated for the power, industry, transportation, and building sectors; importance is attached to the application of new and renewable energy technologies such as solar, wind, and hydrogen energy; specific goals are set concerning coal power transition, nuclear energy development, energy efficiency improvement, carbon capture and storage, electrification, and building renovations; and the importance of energy security in transition planning is stressed. ③ A sound and mature emissions trading system and a fair transition mechanism are established to support the realization of the transition goals, and developing countries are helped to reduce emissions through technical dialogues and climate financing. To reach peak carbon emissions and achieve carbon neutrality, China should develop relevant roadmaps at national, sectoral, and provincial levels and strengthen R&D of key decarbonization technologies. At the same time, China should enhance its regulatory regime, and improve the carbon emissions trading system, the green financial system, and the just transition mechanism. [ABSTRACT FROM AUTHOR]

Objective To study the difference of ankle cartilage thickness and its change under load between young male grass-roots soldiers and healthy young male control group. Methods 20 young male grass-roots soldiers and 20 age-matched healthy men were enrolled in this study. 3T MRI was per.formed with 3-D fat-saturated T1 -weighted sequence before and after compression was applied to the right ankle using a lower extremity joint load device. The cartilage thickness of three parts of the ankle was measured and the compression radio under load was calculated. Results The cartilage in the lateral central, and medial ankle was significantly thicker (P<11.001) in the soldiers (2.76±0.36) mm, (2.72±0.32) mm, (2.79±0.36) mm than the control group (2.30±0.30) mm, (2.23±0.26) mm, (2.31±0.28) mm. The lateral, central, and medial cartilage was significantly thicker (P<11.001) before (2.76±0.36) mm, (2.72±0.32) mm, (2 79±0.36) mm than that after (2.45±0.36) mm, (2.46±0.29) mm, (2.52±0.36) mm compression in the soldiers. The lateral, central, and medial cartilage was also significantly thicker (P<0.001) before (2.30±0.30) mm, (2.23±0.26) mm, (2.31±0.28) mm than that after (2.W± 0.29) mm, (2.13±0.25) mm, (2.22±0.26) mm compression in the control group. The compression ratios of lateral (11.22±4.81 )%, central (9.65±2.65)%, and medial (9.95±3.95)% cartilage thickness under load in the soldiers were significantly higher (P<0.001) than that of the control group (4.15±1.43)%, (4.42±1.48)%, (4.13±1.35)%. There was correlation between the compression ratios of cartilage thickness under load and the total training time per week of soldiers {P<0.001). Conclusion The thickness of ankle cartilage in grass-roots soldiers was higher than that of control group. The cartilage thickness decreased under load with higher compression ratio in soldiers and longer military training. [ABSTRACT FROM AUTHOR]

目的 研究中等职业学校(简称中职)新入学学生的心理健康状况,为开展心理健康教育提供 依据。方法 采用整群抽样法,抽取该校新入学的学生1400名,使用症状自评量表 (SCL-90) 对其进行心理健 康状况研究,采用SPSS26.0统计软件对数据进行统计分析。结果 有效调查问卷为1397份。该校新入学的 中职学生心理健康问题检出率达36.8% (514/1 397),其中强迫、人际关系和抑郁是中职入学新生中存在的三 大心理健康问题。女生的总分及各因子分均高于男生,差异均有统计学意义(P <0.01)。与全国职业院校学生 常模比较,该校新生的躯体化、焦虑、敌对、恐怖因子分数的值均高于常模,差异均有统计学意义(P <0.01)。结 论 新入学的中职学生整体心理健康状况相对低于全国常模,女生较男生更容易出现心理问题。 [ABSTRACT FROM AUTHOR]

Obesity causes the ovulation disorder, difficulty conceiving naturally and infertility. With the incidence of infertility in obese women increasing, the number of people seeking assisted reproductive technology is also rising. Obesity increases the days and doses of Gn, decreases the number of eggs obtained, and reduces the clinical pregnancy rate and live birth rate. Obesity affects oocyte quality, preimplantation embryo quality and endometrial receptivity. Obesity affects oocyte quality by altering follicular fluid metabolites and gene expression, increasing lipotoxicity and adiponectin, and intervening telomere morphology. The model of diet induced obesity (DIO) showed that the delayed development of oocyte and the change of cell composition affected the quality of embryo. Animal models showed that obesity impaired endometrial decidualization. The endometrial receptivity array (ERA) and sequence analysis showed that the abnormal gene expression in endometrium of implantation window affected endometrial receptivity. Obese pregnancies increase the risk of obstetric complications. Obesity in mothers increases the risk of metabolic disorders in multigenerations, which is an intergenerational effect. Weight loss methods includes lifestyle improvement, drug intervention, surgery and so on. In clinic, obese couples are advised to lose weight timely and reasonably according to their age and ovarian reserve. [ABSTRACT FROM AUTHOR]

Taking anthracite from Taixi and North Korea respectively as references, the amorphous graphite associated with high metamorphosed anthracite was qualitatively and quantitatively analyzed in this study. The demineralized test samples were analyzed through X-ray and Raman spectrum, and then the demineralized test samples were separated by float-and-sink analysis. The results show that the C(002) diffraction peaks of parts of demineralized graphite associated with high metamorphosed anthracite from different sampling positions exist, their peak intensity is different, and the diffraction peaks are broadening. The comparison of G band and D band parameters of Raman spectrum shows that the thermal evolution stage of amorphous graphite associated with high metamorphosed anthracite is between paranthracite and flake graphite. Using the disordered carbon content of Raman spectrum to characterize the anthracite relative content of amorphous graphite associated with high metamorphosed anthracite, and with the content of disordered carbon of Raman spectrum equivalent to the total float content, its corresponding separation density can be considered to be the separation density between amorphous graphite and anthracite of the samples, its value ranges from 1.665 g/cm3 to 1.681 g/cm3. [ABSTRACT FROM AUTHOR]

Objectives: Currently, two global navigation satellite system （GLONASS） -K1 and four GLONASS-M+ satellites transmit code division multiple access (CDMA) signals on the third frequency in addition to the traditional frequency division multiple access (FDMA) signals on the first two frequencies, making it possible for GLONASS joint use of FDMA and CDMA signals for precise point positioning (PPP). To follow with the trend of multi-frequency and multi-system, GPS+GLONASS triple-frequency uncombined PPP ambiguity resolution (AR) model is investigated. Methods: First, a GPS+GLONASS triple-frequency uncombined PPP model considering the inter-frequency clock bias (IFCB) of GPS and GLONASS systems is presented. Then we present the triple-frequency uncalibrated phase delay (UPD) estimation method and PPP-AR algorithm. However, limited to the number of GLONASS triple-frequency observations and its distribution, we combine GPS and GLONASS triple-frequency observations for PPPAR, but only fix GPS triple-frequency ambiguities, while GLONASS ambiguity maintains its floating point form. The IFCB and UPD products are estimated by more than 300 multi-GNSS experiment (MGEX) stations distributed around the world, and another 14 MGEX stations are used to evaluate PPPAR performance. Results: Experimental results demonstrate that the best positioning performance has been achieved by our algorithm. Compared with GPS triple-frequency PPP-AR, the positioning accuracies of the static experiments in the east, north, up and 3D directions are improved by 80.7%, 60.0%, 61.0% and 63.8% respectively, and that of the simulated dynamic experiments are improved by 41.9%, 14.5%, 11.6% and 16.3%. However, if GLONASS IFCB errors are ignored, the stability of the convergence series of the combined triple-frequency PPP-AR will be harmed, causing the positioning performance even inferior to GPS single system. Moreover, our algorithm achieves rapid ambiguity resolutions. The average time to first fix time of static and simulated dynamic experiments of our model is about 12.3 and 12.9 min respectively, which is significantly improved compared with GPS, in which the improvement of the simulated dynamic experiment is 53.8%. Besides, compared with the scheme of combining GPS triple-frequency observations and GLONASS dual-frequency observations, after integrating GLONASS CDMA observations, the stability of the positioning time series of the simulated dynamic experiments is effectively im proved, and the root mean square value of positioning errors in each direction can be reduced. Conclusions: These results demonstrate that the best positioning performance can be achieved by the proposed GPS+ GLONASS triple-frequency PPP-AR. Moreover, GLONASS IFCB errors must be carefully investigated and calibrated beforehand. However, limited by the number of GLONASS CDMA datasets and other factors, it is difficult to perform GLONASS triple-frequency PPP-AR with FDMA and CDMA signals currently. In the future work, we will focus on the investigation of GLONASS triple-frequency PPP-AR. [ABSTRACT FROM AUTHOR]

Objective: To investigate the relationships between the expression of Rab guanine nucleotide exchange factor 5 (RABEX-5), homo sapiens longevity assurance homologue 2 (LASS2), homeodomain protein B7 (HOXB7) and clinicopathological characteristics and prognosis of colorectal cancer tissues. Methods: 105 patients with colorectal cancer who were treated in our hospital from October 2013 to April 2015 were selected as study subjects. Expressions of RABEX-5, LASS2, HOXB7 in colorectal cancer tissues and adjacent tissues were detected. The relationships between the expression of RABEX-5, LASS2, HOXB7 and clinicopathological characteristics were analyzed. Kaplan-meier survival curve was used to analyze the difference in the overall survival rate of patients with different expressions of RABEX-5, LASS2, HOXB7. Prognostic factors of patients with colorectal cancer was analyzed by Cox proportional risk regression. Results: Compared with adjacent tissues, the positive rates of expression of RABEX-5, HOXB7 in colorectal cancer tissues were increased, while the positive rates of LASS2 were decreased (P<0.05). LASS2 expression was associated with TNM stage, infiltration depth and lymph node metastasis (P<0.05), while expressions of RABEX-5, HOXB7 were associated with TNM stage and lymph node metastasis (P<0.05). The survival rates of patients with positive expression of RABEX-5, HOXB7 were respectively lower than those with negative expression of RABEX-5, HOXB7, while the survival rates of patients with positive expression of LASS2 were higher than those with negative expression of LASS2 (P<0.05). The influence factors of the prognosis of patients with colorectal cancer included TNM staging Ⅲ period, with lymph node metastasis, RABEX-5 positive expression, LASS2 negative expression and HOXB7 positive expression (P<0.05). Conclusion: The positive rates of RABEX-5, HOXB7 in colorectal cancer tissues are increase, while the positive rates of LASS2 are decreas, it is closely related to TNM stage and lymph node metastasis. Expressions of RABEX-5, LASS2, HOXB7 are closely related to survival and prognosis of patients with colorectal cancer. [ABSTRACT FROM AUTHOR]

BACKGROUND: Antifibrinolytic drugs are widely used to reduce blood loss in total knee arthroplasty. Although the hemostatic effect of tranexamic acid and aminocaproic acid in total knee arthroplasty has been confirmed, which is superior or inferior is still controversial. OBJECTIVE: To compare the safety and effectiveness of tranexamic acid and aminocaproic acid in the perioperative period of total knee arthroplasty. METHODS: 102 patients undergoing unilateral total knee arthroplasty in the Sixth Affiliated Hospital of Xinjiang Medical University from April 2021 to June 2022 were retrospectively screened. These patients were divided into two groups according to different antifibrinolytic hemostatic agents applied during the perioperative period. Of these, 49 patients used aminhexic acid and 53 patients used tranexamic acid. Both groups received intravenous and topical combinations. The blood loss and coagulation indexes, postoperative hospital stay and postoperative complications in the perioperative period of total knee arthroplasty were compared between the two groups. RESULTS AND CONCLUSION: (1) Preoperative data: No significant differences in age, gender composition, body mass index, hypertension, diabetes mellitus, operation time, erythrocytes, hemoglobin, hematocrit, albumin, prothrombin activity, international standard ratio, or D-dimer index were found between the two groups (P > 0.05). (2) Blood loss and coagulation indexes: There were significant differences in total blood loss and recessive blood loss between the tranexamic acid group and the aminocaproic acid group (P < 0.05). There was no significant difference in estimated blood volume, dominant blood loss and postoperative drainage between the two groups (P > 0.05). There was no significant difference in erythrocyte, hemoglobin, hematocrit, albumin, serum ferritin, D-dimer, prothrombin activity and international standard between the two groups at 1 and 5 days after operation (P > 0.05). (3) Blood transfusion: The amount of blood transfusion in the tranexamic acid group was significantly less than that in the aminocaproic acid group (P < 0.05), but there was no significant difference in blood transfusion rate between the two groups (P > 0.05). (4) There was no significant difference in postoperative hospital stay and postoperative complications between the two groups (P < 0.05). (5) The results showed that the hemostatic effect of tranexamic acid in the perioperative period of total knee arthroplasty was stronger than that of aminocaproic acid, and the safety of the two drugs was basically the same. Therefore, the authors suggest that tranexamic acid should be the first choice as an antifibrinolytic hemostatic drug in the perioperative period of total knee arthroplasty. [ABSTRACT FROM AUTHOR]

In view of the problems such as untimely monitoring, low accuracy of monitoring data, and few monitoring data in the manual monitoring on deep-large foundation pit, relying on a foundation pit project in Wuhan City, the monitoring results such as deformation and stress of foundation pit were obtained by using automatic monitoring and collection equipment, and the cloud platform for automatic monitoring and intelligent early warning of deep foundation pit was established by using the front-end development tool Visual Studio Code and the back-end development tool IntelliJ. The research results show that the maximum horizontal displacement of the retaining pile is 0. 4 times the retaining pile length, and the ground settlement increases with the increase of excavation depth of the foundation pit. It also can be investigated that the supporting axial force increases linearly with increasing excavation depth of the foundation pit, and the growth rate of the axial force decreases with the application of the subsequent support. The automatic monitoring and intelligent early warning platform of deep-large foundation pit has realized the automatic monitoring, intelligent dynamic prediction and risk assessment in the whole construction process of foundation pit. [ABSTRACT FROM AUTHOR]

BACKGROUND: There is currently a lack of extensive multi-center clinical research on the accuracy of the artificial intelligence (AI) HIP planning system for predicting the prosthesis size. Compared with the two-dimensional template planning, it remains poorly understood whether it is more accurate and whether it has advantages in restoring the acetabular and femoral eccentricity and rotation center. OBJECTIVE: To investigate the accuracy of AI HIP preoperative planning system in predicting the size of total hip arthroplasty prosthesis and its influencing factors, and to analyze its value in restoring eccentricity and rotation center. METHODS: According to the random number table method, 70 cases were divided into two groups (n=35). AIHIP (study group) and Smart Joint twodimensional digital template (control group) were used for preoperative planning. The accuracy of predicting the prosthesis size between the two groups was compared, and the potential factors affecting the accuracy of AI HIP prediction were analyzed, including age, gender, body mass index, International Society of Osseous Circulation (ARCO) staging and femoral medullary cavity classification (Dorr classification). The acetabular eccentricity, femoral eccentricity, horizontal and vertical displacement difference of the center of rotation, and the length difference of both lower extremities were measured before and after operation. RESULTS AND CONCLUSION: (1) The prediction of the prosthesis size on the acetabular side and femoral side was 57.1% (20/35) and 42.9% (15/35) in the study group, and 31.4% (11/35) and 34.3% (12/35) in the control group. The prosthesis compliance rates of the study group on acetabular side and femoral side were 94.3% (33/35) and 82.9% (29/35), while those of the control group were 74.3% (26/35) and 62.9% (22/35); the difference between the two groups was statistically significant (P < 0.05). (2) Logistic regression analysis showed that gender, body mass index and femoral canal classification had no effect on the accuracy of the femoral stem. Compared with the control group, AI HIP had more advantages in planning the Dorr A femoral medullary cavity, and the comparison between the two groups was statistically significant (P=0.012). The postoperative femoral eccentricity and total eccentricity in the control group were greater than those in the study group, and the differences were statistically significant (all P < 0.05). (3) In the horizontal direction, the average displacement of the center of rotation was 1.8 (-0.7, 4.1) mm in the study group, and 2.3 (-0.5, 5.0) mm in the control group; in the vertical direction, the average displacement in the study group was 0.8 (-1.5, 2.7) mm and -1.5 (-3.6, 2.5) mm in the control group, with no statistical significance (P > 0.05). There was no significant difference in the length of both lower limbs between the two groups after operation, which was 3.05 (2.01, 3.89) mm in the study group and 3.63 (2.60, 5.30) mm in the control group (Z=-1.736, P=0.083). (4) These results confirm that the AI HIP preoperative planning system has higher accuracy than the digital two-dimensional template in predicting the size of the acetabular and femoral stem prostheses, and has more advantages in planning the shape of the Dorr A femoral medullary canal. Using artificial intelligence deep learning technology helps to more reliably predict the length and eccentricity of the lower limbs and restore the center of rotation of the hip joint. [ABSTRACT FROM AUTHOR]

Vitrification of municipal solid waste incineration (MSWI) fly ash is a promising technology to treat hazardous wastes・ The feed-to-glass conversion during the melting solidification process has been of great concern・ Phase transformations of fly ash and the feed (the mixture of fly ash and glass additive) at elevated temperature were analyzed w让h ICP-AES, IC, DSC and XRD・ The results show that the fly ash is mainly composed of Ca, Si, and Cl, and the crystalline phases mainly include hydrous compounds, chlorides, carbonates, and sulfates・ Fly ash occurs dehydration of hydroxides, decomposition o£ carbonates and formation of silicate intermediate phases as the temperatures increased・ After included glass additives (SiO2 and B2O3), the reactions of dehydration and decarbonation could hardly be affected, while the formation of intermediate silicate phases occurs in the lower temperature and the amorphous phase starts to appear in the feed at 850 ・ The feed finally turns to molten glass at 1300 °C ・ Additionally, prolonging the heat-treatment time could promote feed reactions. [ABSTRACT FROM AUTHOR]

In the covered karst region, karst cave has a great influence on safety of the building foundation. In this study, combining a practical projection, the development situation of karst is analyzed, and shape and scale of the karst cave are clarified. Based on the form of building foundation, grouting treatment on shallow karst caves and fissure is determined, and bearing capacity of foundation can be improved by filling all soil caves to limit development of karst, and strengthening foundation soil. For practical purposes, grouting is carried out from external to inner of the building foundation, and grouting parameters are dynamically adjusted according to the test results of the detection holes. After completion of grouting, geophysical prospecting, detection hole, indoor test, plate loading test, standard penetration test and long-term settlement observation on building are used to evaluate grouting effect. After grouting, strength, soil intensity and deformation of foundation are increased by 6.4% to 25.58%, and bearing capacity of foundation can be increased by more than 10% according to the results of static load test and standard penetration test, suggesting that reinforcing effect of grouting method in foundation treatment is obvious and remarkable. Compared to pile foundation treatment and treatment on a deep karst with large area, grouting in foundation treatment can save 20% to 30% of total cost of construction, and shorten 1/3 of total construction time. [ABSTRACT FROM AUTHOR]

Metal-organic framework (MOFs) is a new membrane modified material with porous nano-structure, which is widely used in waste water treatment, such as the membrane technology for water treatment, because of its complex geometry, adjustable window size, high porosity and excellent hydrothermal stability. Tn this paper, several commonly used MOFs nanoparticles are introduced, and the unique structural characteristics of MOFs are briefly described. The latest application progress of MOFs modified membranes in different wastewater treatment fields is reviewed. By introducing the preparation methods, separation effects and possible separation mechanisms of different MOFs nano-particle modified membranes, their important roles in desalination, heavy metal removal, dye removal and oil/water separation are analyzed. The key problems that need to be solved in the field of waste water treatment by MOFs modified membrane are put forward, in addition, the future research of MOFs modified membranes is also prospected. [ABSTRACT FROM AUTHOR]

Aiming at the problem of insufficient bearing capacity of existing pile foundation in silty clay stratum, the effect of improving bearing capacity of existing pile foundation by side grouting was studied systematically through grouting simulation experiment. The reinforcement mechanism was mainly through the compaction effect of grouting material on the soil around the pile, increasing the friction resistance of the pile-soil interface, restricting the settlement of the pile body, and improving the bearing capacity of the pile foundation. The results showed that the grouting water cement ratio, grouting pressure, grouting hole layout position and grouting amount were the four main controlling factors for the reinforcement effect of pile foundation. The combined action of slurry water-cement ratio and grouting pressure directly affected the compaction effect of slurry on silty clay stratum by controlling the shape of slurry veins. According to the different compaction effects 5 the combination of different water cement ratio and grouting pressure was divided into three reinforcement design areas: strong5 medium and weak. Among them, the compacted soil with a slurry water-cement ratio of 0.8 and a grouting pressure of 2 MPa improved the physical and mechanical strength to the greatest extent. The increase of the bearing capacity of pile foundation was positively correlated with the amount of grouting, and inversely proportional to the distance between the formation position of grouting vein and the pile body. According to the different distance between the formation position of grouting vein and the pile body, the soil reinforced by grouting was divided into the strong action area and the weak action area. In addition, the improvement of lateral friction resistance of pile side grouting was mainly generated in the middle and lower section of pile body. In practical engineering, the reinforcement of this section reduced the consumption of manpower and material resources. [ABSTRACT FROM AUTHOR]

In order to evaluate the drainage system capability and waterlogging risk of the main urban area in Xianyang city. Shaanxi province, one-dimensional and two-dimensional coupled hydrodynamic models of the main urban area were settled based on Info Works ICM model to test the current situation of drainage system, and waterlogging risk was evaluated by the flood disaster index assessment indicators of UK. The results show that the main urban area of Xianyang city adopts the flat grate rainwater inlet, and the coverage degree is satisfied with the design requirement, but the problems such as damage, displacement and silting still exist, and some pipes are seriously clogged, resulting in lower compliance rate of pipes; the diameter of current drainage pipe network is small, so that in the simulation of 4 rainfall intensities (design storm frequencies are 0. 5, 1, 3 and 5 years), the proportions of pipe networks with drainage capacity of once less than 0. 5 year, once 0. 5-1. 0 years, once 1-3 years, once 3-5 years and once more than 5 years are 68. 9%, 5. 8%, 3. 9%, 5. 3% and 16. 1 %, respectively; the areas surrounded by Renmin road-Dongfeng road-Weihe-Xiantong road and Dongfeng road-Hedi road-Fuyin expressway-Jinxu road in the main urban area of Xianyang city are high waterlogging risk. [ABSTRACT FROM AUTHOR]

BACKGROUND: The best prevention strategy for venous thrombosis (VTE) is currently controversial, especially for patients with high risk of total knee arthroplasty. There are no fully safe, effective and inexpensive thrombus prevention drugs. OBJECTIVE: To study the efficacy and safety of aspirin in preventing venous thrombosis after total knee arthroplasty. METHODS: 300 patients undergoing primary unilateral total knee arthroplasty from September 2014 to December 2016 were randomly divided into two groups: conventional anticoagulation group and risk stratification group (n=150 per group), including 88 males and 212 females at the age of 49-85 years old. The conventional anticoagulation group received low molecular weight heparin for prevention and treatment. Risk stratification group was stratified according to the risk of venous thrombosis. 64 patients with low risk were treated with aspirin and 86 patients with high risk were treated with low molecular weight heparin. Complications were analyzed within 90 days after surgery, including deep venous thrombosis, pulmonary embolism, wound infection, bleeding and death. RESULTS AND CONCLUSION: (1) Complications occurred in 39 cases (13%) within 90 days after follow-up. The total incidence of symptomatic deep vein thrombosis complications was 2% in 6 cases, and 19 cases (6.33%) had wound complications. There were 3 cases (2%) of symptomatic deep vein thrombosis in conventional anticoagulation group and 3 cases (2%) in risk stratification group. (2) The incidence of symptomatic deep vein thrombosis, proximal deep vein thrombosis and distal deep vein thrombosis and pulmonary embolism were 1.56% (1 case), 1.56% (1 case), 4.68% (3 cases), and 0% respectively in patients treated with aspirin. The incidence of symptomatic deep vein thrombosis, proximal deep vein thrombosis and distal deep vein thrombosis and pulmonary embolism in patients receiving low molecular weight heparin were 2.12% (5 cases), 0.85% (2 cases), 5.08% (12 cases) and 0.42% (1 case), respectively. There was no significant difference between the two groups (P > 0.05). (3) There were 11 cases of wound complications in the conventional anticoagulation group and 8 cases in the risk stratification group (χ² = 506, P = 0.318). (4) The incidences of wound-related complications (wound delayed healing, superficial wound infection and deep wound infection) were 1.56% (1 case), 0% and 1.56% (1 case) respectively in patients receiving aspirin, and 5.51% (13 cases), 1.27% (3 cases) and 0.42% (1 case) in patients receiving low molecular weight heparin. (5) Results suggested that aspirin and low molecular weight heparin can effectively prevent the occurrence of deep vein thrombosis. For low-risk patients, aspirin multi-mode thrombosis prevention is safe and effective. [ABSTRACT FROM AUTHOR]