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To develop an accurate and effective short-term air traffic flow prediction model to improve the efficiency of terminal area management, the arrival traffic flow was chosen as the research subject. Firstly, the ARMA(autoregressive moving average) model was adopted for initial linear prediction of the flow time series. Then, the residual sequence after linear prediction was subjected to non-linear correction using the LSTM(long short term memory) model. To address the issue of decreased prediction accuracy caused by redundant features, the AE (autoencoder) model was used to adaptively compress and optimize the input of weather and traffic flow features for the LSTM model. Finally, a comparative experiment was conducted to validate the accuracy, robustness, and timeliness of the ARMA-AE-LSTM model. Experimental results demonstrate that the proportion of predicted absolute errors within 1. 3 aircraft reaches 75% . The average iteration time of the LSTM model is reduced to 1. 014 seconds. When compared with other commonly used deep learning prediction models, the ARMA-AE-LSTM model improves the RMSE ( root mean square error), MAE (mean absolute error), and R² (r-squared) evaluation metrics by 45. 98% ~ 67. 66%, 48. 56% ~ 67. 35%, and 5. 18% ~ 21. 07%, respectively. Furthermore, the ARMA-AE-LSTM model exhibits better robustness in adverse weather conditions. Thus, it can be concluded that this method enables accurate, effective, and rapid prediction of air traffic flow. [ABSTRACT FROM AUTHOR]

The study aimed to explore the impact of different proportions of probiotic fermented soybean meal on the reproductive performance, lactation performance of sows, and the growth performance of piglets. Forty-eight healthy and similar-sized pregnant sows were selected and randomly divided into four groups, with 12 replicates per group, each replicate consisting of one sow. The control group sows were fed a basal diet, while the fermented soybean meal groups replaced the soybean meal in the basal diet with 5%, 10%, and 15% of probiotic-fermented soybean meal, respectively. A one-week pre-experimental period was followed by a formal experimental period from 90 days of gestation to 21 days postpartum. The results showed that feeding sows with 10% and 15% of probiotic fermented soybean meal increased the number of piglets born, the number of live piglets, and the number of healthy piglets (P<0.05), and reduced the average duration of parturition (P<0.05). The rate of healthy piglets in all groups fed with fermented soybean meal was increased, and the rate of stillbirths was decreased (P<0.05). Compared with the control group, feeding with 10% and 15% of probiotic fermented soybean meal significantly increased the sow's feed intake during the second week and the average feed intake during the entire lactation period (P<0.05), significantly reduced backfat loss (P<0.05), increased milk yield, milk fat percentage, lactose percentage, milk protein percentage, and non-fat solid levels (P<0.05), and reduced the level of milk urea nitrogen (P<0.05). Compared with the control group, the birth weight, weaning number, and individual weight at weaning of piglets in the 10% and 15% probiotic fermented soybean meal groups were all increased (P<0.05), and the diarrhea rate was decreased (P<0.05). The weaning weight and survival rate of piglets in all probiotic fermented soybean meal groups was increased (P<0.05). The study indicates that the addition of an appropriate proportion of probiotic fermented soybean meal to the diet of pregnant sows can improve reproductive performance and milk yield, enhance milk quality, and improve the growth performance and survival rate of piglets. Considering production costs, the optimal addition ratio of probiotic fermented soybean meal is 10%. [ABSTRACT FROM AUTHOR]

In order to grasp the current development status of ecological animal husbandry in Chengde area, the main problems and urgent problems in the production process of breeding farms were analyzed. The research group conducted a survey on the current development status of ecological animal husbandry in Chengde area from April 15 to June 28, 2024. Through online and offline research methods, the research team grasped the current problems in animal husbandry in Chengde area, which helped to evaluate the level of ecological animal husbandry development in Chengde City. By proposing long-term development strategies for ecological animal husbandry, it provided theoretical and technical supports for the efficient and sustainable development of ecological animal husbandry. [ABSTRACT FROM AUTHOR]

Shenfu low-metamorphic bituminous coal(SF) was pretreated with ethanol and hexane and then pyrolyzed at a slow rate in a fixed-bed pyrolysis plant to explore the influence of pretreatment on the pyrolysis characteristics of the coal・ The changes of coal before and after pretreatment and the pyrolysis products were analyzed by X-ray diffractometry (XRD), infrared spectroscopy (FTIR), thermogravimetric (TG), gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC)・ The results showed that pretreatment could promote the transformation of SF coal into light products and enrich the aromatic compounds in tar. After ethanol pretreatment, the relative percentage of aromatic hydrocarbons in tar increased significantly (up to 47・ 99%), and the relative percentage of phenol in tar after n<-hexane pretreatment increased significantly (up to 30.43%). [ABSTRACT FROM AUTHOR]

The experiment was to study the effect of Gynostemma pentaphyllum ultrafine powder on growth performance, nutrient apparent digestibility and serum biochemical index of Hyland brown egg chicks. 180 one-day-old Hyland brown egg chicks (females) with similar body weight were randomly divided into four groups, with three replicates in each group and 15 in each replicate, setting control group, 0.25%, 0.50% and 1.00% Gynostemma pentaphyllum ultrafine powder addition group, respectively. The experiment lasted for 42 d. The results showed that at 28 and 42 d of age, the average daily gain of laying chicks in 0.50% group and 1.00% group was significantly higher than that of control group (P<0.05), and feed to gain ratio was significantly lower than that of control group (P<0.05). The apparent digestibility of organic matter, crude fiber, ether extract, calcium and phosphorus in 0.25% group, 0.50% group and 1.00% group was higher than that in control group (P>0.05), and the apparent digestibility of dry matter and crude protein in 0.50% group and 1.00% group was significantly higher than that in control group (P<0.05). The serum total protein content of chicks in 0.50% and 1.00% groups was significantly higher than that in control group (P>0.05), and the alanine aminotransferase activity, total cholesterol and triglyceride contents of chicks in 0.50% group and 1.00% group were significantly lower than those in control group (P<0.05). The content of immunoglobulin M in serum in 0.25% group, 0.50% group and 1.00% group was significantly higher than that in control group (P<0.05), and the content of IgG and IgA in serum in 0.50% group and 1.00% group was significantly higher than that in control group (P<0.05). The experiment indicates that 0.50% and 1.00% Gynostemma pentaphyllum ultrafine powder can improve the growth performance and nutrient apparent digestibility of Hyland chicks, improve serum biochemical indexes and improve the immune level, suggest appropriate adding amount at 0.50%. [ABSTRACT FROM AUTHOR]

Objective: To investigate the Effects of vaginal and open surgery on pelvic floor function, inflammatory stress response and sexual quality of life in patients with uterine benign tumor. Methods: The clinical data of 78 patients with uterine benign tumor from March 2017 to January 2019 were analyzed retrospectively, the patients were divided into group A (n=38, treatment by open surgery) and group B (n=40, treatment by vaginal surgery) according to the different operative plans, the indexes of perioperative period, inflammatory stress indexes [Interleukin-6 (IL-6), C-reactive protein (CRP), Cortisol Cor ], pelvic floor dysfunction, complications and sexual quality of life were compared between the two groups. Results: The time of exhaust, operation, hospitalization and getting out of bed in group B were shorter than that in group A, and the amount of bleeding was less than that in group A (P<0.05). The levels of IL-6, CRP and cor were all increased in two groups, but the level in group B was lower than that in group A (P<0.05). The incidence of pelvic floor dysfunction in group B was 12.50% (5 / 40), lower than 36.84% (14 / 38) in group A (P<0.05). The score of Female sexual function index scale FSFI in the two groups was higher than that before operation, and the score in group B was higher than that in group A (P<0.05). The incidence of postoperative complications in group B was lower than that in group A (P<0.05). Conclusions: Compared with laparotomy, vaginal surgery can effectively improve the perioperative indicators, inflammatory stress response, pelvic floor function and sexual quality of life, and reduce the incidence of complications. [ABSTRACT FROM AUTHOR]

The outlet flow field of an agricultural sprayer nozzle with water as single medium fluid is studied by qualitative and quantitative experiments. Firstly，conventional shooting method using a single-lens reflex camera is used to record the outflow field of the nozzle with the spray pressure ranging from 50 Pa to 4 000 Pa. As the spray pressure increases，the shape of the jet flow at the outlet of the nozzle undergoes a process of bubble formation to corruption， as well as the development and final stabilization of the jet. Then， quantitative measurement is carried out on the outlet flow field of the nozzle with the spray pressure of 1 000— 4 000 Pa，using PIV velocity measurement technique. A quantitative measurement experiment is conducted to obtain that on the longitudinal section，the outlet velocity of the nozzle increases with the spray pressure， and the velocity along the center line shows an oscillating attenuation decrease with the increase of the distance from the nozzle. At the same transverse section，with the increase of the spray pressure，the stronger the swirl strength is，the greater the flow velocity will be；while at the same spray pressure，the closer the cross section to the nozzle outlet is ，the stronger the swirl strength and the greater the flow velocity will be. The experimental results in this paper show an important reference value to the design of spray nozzles and similar atomizer nozzles. It is also verified that the PIV velocity measurement technique can be used to measure the velocity field of water droplets. [ABSTRACT FROM AUTHOR]

目的对比宫腔镜手术静脉全身麻醉中不同剂量纳布啡的应用效果。方法将270例拟行宫腔镜手术的患者随机分为3组各90例,N1组患者在宫腔镜手术静脉全身麻醉中静注0.1 mg/kg纳布啡,N2组静注0.15 mg/kg纳布啡,N3组静注0.2 mg/kg纳布啡。比较各组麻醉开始前（T0）、睫毛反射消失时（T1）、扩张宫颈时（T2）、术毕清醒时（T3）的血流动力学指标（SBP、DBP、HR、SpO2）,记录各组手术时间、丙泊酚用量、术后苏醒时间及术中肢体活动、呼吸抑制、术后恶心呕吐、术后头晕例数,另比较各组术后1 h各疼痛评分、镇静评分例数。结果 3组内各时点SBP、DBP、HR、SpO2比较,P均<0.05;3组间同时点SBP、DBP、HR、SpO2比较,P均>0.05。N1组术中肢体活动例数与其余两组比较,N3组术后恶心呕吐、头晕例数与其余两组比较,P均<0.05。与N1组比较,N2组和N3组丙泊酚用量低,术后苏醒时间短（P均<0.05）。与N1组比较,N2组疼痛评分0分、1分例数多,疼痛评分3分、镇静评分2分例数少（P均<0.05）;与N1组比较,N3组疼痛评分0分、1分及镇静评分4分例数多,疼痛评分3分及镇静评分2分例数少（P均<0.05）;与N2组比较,N3组镇静评分2分、3分例数少,4分例数多（P均<0.05）。结论 0.15 mg/kg纳布啡具有较好的麻醉镇痛效果和安全性,术后不良反应发生率低,较其他剂量组更适合用于宫腔镜手术。 [ABSTRACT FROM AUTHOR]

Focusing the influence of high-lift configuration of an airplane on wing aerodynamic characteristics， an experiment is conducted in NH-2 low-speed wind tunnel over a swept constant chord half-model (SCCH) high-lift configuration of a civil aircraft. In this experiment， the Mach number is 0.2 and the Reynolds number is 1.85×106. The effect of salt deployment angle， gap and over-lap on efficiency of high-lift configuration is investigated. Based on the test results， best slat parameters of this model are obtained for both take-off and landing configurations. The results show that both the stall angle of attack and the maximum lift coefficient increase with the slat deployment angle increasing from 18° to 24°， and only the stall angle of attack increases while the maximum lift coefficient does not change obviously when the angle increasing from 25° to 31°. The best slat gap width is from 1.5% to 2.0% for take-off configuration， while 2.0% to 2.5% for landing configuration. The best over-lap is around 1.0% for take-off configuration， while －1.0% to 0% for landing configuration. The best slat gap width presents increasing trend with the increase of the slat deployment angle. [ABSTRACT FROM AUTHOR]

Objective: To analyze the value of preoperative DSA injury grading in splenic artery embolization for traumatic splenic rupture. Method: A total of 95 patients with traumatic splenic rupture admitted to our hospital from January 2020 to December 2022 were selected for study. According to the random number table method, they were divided into routine operation group (45 cases) and DSA-guided splenic artery embolization group (50 cases). The routine operation group underwent open total splenectomy, and the DSA-guided splenic artery embolization group underwent DSA-guided splenic artery embolization. The operation-related indexes, T lymphocytes (CD3', CD4", CD8', CD4/CD8'), immunoglobulin (IgG, IgA, IgM), white blood cell (WBC) and platelet (PLT) contents, serum interleukin 6 (IL-6), serum interleukin 10 (IL-10) and tuftsin levels of different DSA grades in the two groups and DSA-guided splenic artery embolization group were analyzed. Results: Compared with the conventional operation group, the splenic artery embolization group under DSA guidance had shorter operation time, bed time and hospital stay, and less intraoperative blood loss (P<0. 05). On postoperative day 14, compared with the conventional operation group, the levels of CD3, CD4", CD4/CD8 in the DSA-guided splenic artery embolization group were higher, and the levels of CD8 were lower (P<0.05). On day 14 after surgery, the levels of IgG, IgA and IgM in the DSA-guided splenic artery embolization group were higher than those in the conventional operation group (P<0.05). At 14 days after operation, PLT content in the DSA-guided splenic artery embolization group was lower than that in the conventional operation group. Compared with DSAIII, the PLT content of DSA III was lower (P<0.05). On the 14 th day after operation, compared with the conventional operation group, the serum IL-6 level in the DSA-guided splenic artery embolization group was lower, and the serum IL-10 and Tuftsin levels were higher (P<0.05). Conclusion: Under the guidance of DSA injury grading, splenic artery embolization for patients with traumatic splenic rupture has little effect on the immune function of the body, and there will be no massive bleeding during the operation, which can not only reduce the platelet content of the patients, but also promote the recovery of the patients as soon as possible. INSET: +.. [ABSTRACT FROM AUTHOR]

The experiment was to study the effect of yeast culture and Bacillus subtilis on production performance of Simmental hybrid fattening cattle. A total of 40 Simmental crossbred cattle with a body weight of (390.0±16.2) kg were selected and randomly divided into four groups, with ten replicates in each group and one cattle in each replicate. The cattle in control group were only fed with basal diet, and the cattle in group Ⅰ, group Ⅱ and group Ⅲ were fed with basal diet supplemented with 0.1%, 0.2% and 0.3% yeast culture + Bacillus subtilis (mixing ratio 1∶ 1), respectively. The pre-trial period was 5 d, and the formal test period was 60 d. The results showed that compared with control group, the whole-term weight gain and average daily weight gain of beef cattle in group Ⅱ and group Ⅲ were significantly increased (P<0.05). Compared with control group, the serum AST activity and TC content of beef cattle in group Ⅱ and group Ⅲ were significantly decreased (P<0.05), and the serum TP content was significantly increased (P<0.05). Compared with control group, the content of lactic acid bacteria and Bifidobacteria in the beef cattle feces of group Ⅱ and group Ⅲ was significantly increased (P<0.05), and content of Escherichia coli was significantly decreased (P<0.05). The study indicates that adding 0.2% of microecological preparations compounded by yeast culture and Bacillus subtilis to beef cattle's fattening diet can improve production performance, serum biochemical indiexes and intestinal flora structure of beef cattle. [ABSTRACT FROM AUTHOR]

The zinc(II)N, N-dimethyl-4-[2,2′:6′,2″-terpyridine]-4′-yl aniline(terpyridine-zinc complex)is prepared, and used to modify TEMPO-oxidized cellulose nanofibril by coordination bond, then the modified cellulose nanofibril with fluorescence property is obtained. Finally, terpyridine-zinc complex grafted cellulose nanofibril film(modified film)is acquired by vacuum filtration. The structure of the product is characterized using IR and X-ray diffraction(XRD). The optical property of the product is studied by UV absorption spectroscopy and fluorescence spectroscopy. The surface morphology of the product is observed by SEM. The results show that the TEMPO-oxidized cellulose nanofibril is successfully modified by coordination bonds using terpyridine-zinc complex, and its nanoscale has not changed. The modified film with good solvatochromic performance was obtained. The fluorescence spectrum of the modified film would occur obvious changes under the stimulation of different solvents. [ABSTRACT FROM AUTHOR]

In order to identify the pathogen causing the death of Chinese grass turtle (Chinemys reevesiis) and identify its biological characteristics, a pathogenic bacterium was isolated from the diseased liver tissue of the dead Chinese tortoise in this study, which was identified as Aeromonas veronii by biochemical identification and named CRQ1. The pathogenicity, virulence genes, drug resistance and drug resistance genes of CRQ1 were detected by zebrafish attack test, PCR and KB susceptibility disk method. The results showed that the LD50 of CRQ1 strain to zebrafish was 3. 57 x107cfu/ml, carrying aerA, act, aha, Ser, Exu, Up, Hly, ompA and LuxS nine virulence genes were found to be sensitive to nine kinds of drugs, including tilmicosin, ciprofloxacin and enrofloxacin, and it was moderately sensitive to eight drugs such as amikacin, streptomycin, and Sulfamethoxypyrimidine, but resistant to neostigmine. The isolates carried let(A), tet(E), oqxA, gyrA, gyrB, parC, parE, aminoglycoside resistance genes aac2, aac(6)-Ib, aadB, aao4, sulfonamide resistant sul-I and macrolide resistance gene emB． However, it did not express the corresponding resistance phenotype, which was related to the duration and frequency of drug use. It is suggested that A veronii is the pathogenic bacteria causing the death of Chinese grass turtle, and it carries virulence genes related to pathogenicity and has potential drug resistance. This study provides a basis for the study of pathogenic mechanism and prevention and control of A. veronii from Chinese grass turtle. [ABSTRACT FROM AUTHOR]

The study was to investigate the effect of adding bacteriophages, probiotics and antimicrobial peptides (AMP) in basic diet on growth performance, intestinal flora and slaughter performance of meat rabbits. 350 New Zealand rabbits of 30-day-old with similar body weight were randomly divided into seven groups, with five replicates in each group, and ten rabbits in each replicate. The rabbits in control group were fed with basic diet, and those in group 1, group 2, group 3, group 4, group 5 and group 6 were fed a basal diet supplemented with phage, probiotics, antimicrobial peptides, phage + probiotics, bacteriophage + antimicrobial peptides and antimicrobial peptides + probiotics, respectively. The experimental period was 35 d. The results showed that compared with control group, the feed to gain ratio, diarrhea rate and mortality rate of meat rabbits in experimental group were significantly decreased (P<0.05). The number of lactic acid bacteria in meat rabbits in experimental group was significantly increased (P<0.05), the number of Salmonella and Escherichia coli of meat rabbits in experimental group was significantly decreased (P<0.05). Kidney index in meat rabbits in experimental group 4 and group 5 was significantly decreased (P<0.05). The spleen index of experimental group 1 and group 5 was significantly increased (P<0.05). The experiment indicates that the addition of phage, probiotics and antimicrobial peptides can improve the performance of meat rabbits, improve intestinal microecological environment and slaughter performance, the combination of phage and antimicrobial peptides can significantly improve performance indicators. [ABSTRACT FROM AUTHOR]

A multi-residue method was established to simultaneously determine seven herbicides (simetryn, isoproturon, bensulfuron methyl, anilofos, oxyfluorfen, oxadiazon and pendimethalin) in rice using QuEChERS and high performance liquid chromatography-tandem mass spectrometry Triple TOF (HPLC-MS/MS Triple TOF). The samples were extracted with a mixture of ethyl acetate and water (Vethyl acetate : Vwater = 80 : 20), purified by dispersive solid phase extraction with primary secondary amine (PSA), and detected by HPLC-MS/MS Triple TOF using the external standard method for quantitative analysis. Good linearity was achieved with a correlation coefficient of 0.99. The average recoveries of simetryn, isoproturon, bensulfuron methyl and anilofos ranged from 75% to 108% with the spiked levels of 0.001, 0.01 and 0.05 mg/kg. And the relative standard deviation (RSD) ranged from 1.1% to 7.0% (n = 5). The limits of quantification (LOQs) of all those herbicides were 0.001 mg/kg. The average recoveries of oxyfluorfen, oxadiazon and pendimethalin ranged from 81% to 108% with the spiked levels of 0.01, 0.05 and 1 mg/kg. And the RSD ranged from 2.9 % to 9.0% (n = 5). And their LOQs were 0.01 mg/kg. This method is simple and rapid. Its sensitivity, accuracy and precision can meet the requirements of the pesticide residue analysis. Therefore, this method can be applied to the simultaneous analysis of simetryn, isoproturon, bensulfuron methyl, anilofos, oxyfluorfen, oxadiazon and pendimethalin in rice. [ABSTRACT FROM AUTHOR]

Objective: To investigate the clinical effect of splenic artery interventional embolization in the treatment of traumatic spleen rupture and its effect on the immune function. Methods: 116 cases of patients with traumatic splenic rupture who were treated in the 97 th Hospital of the Chinese People’s Liberation Army from April 2013 to February 2017 were selected. According to different treatment methods, they were divided into 60 cases in the observation group and 56 cases in the control group. The control group was given splenectomy, and the observation group was treated by splenic artery interventional embolization. The postoperative ambulation time, postoperative hospital time, postoperative anus defecation time, postoperative anus exhaust time, intraoperative blood transfusion,operation time, the changes of CD4~+/CD8~+, CD8~+, CD4~+, CD3~+ before and after treatment and the occurrence of adverse reactions of the two groups were recorded and compared. Results: All patients completed the treatment and were successfully rescued. The postoperative activity out of bed days, the time of hospitalization after operation, the time of postoperative anus defecation, the time of postoperative anus exhaust, the amount of blood transfusion and the operation time of the observation group were less than those of the control group(P<0.05). In the observation group, the incidence of acute intestinal obstruction, acute pancreatitis, pneumonia and other complications during the perioperative period was 3.33%, it was 17.86% in the control group and was higher than that of the observation group(P<0.05). On the 14 th day after operation, the content of white blood cells and platelets in both groups were significantly higher than those on 1 day before operation(P<0.05), but the content of platelet in the observation group was significantly lower than that of the control group(P<0.05), but there was no significant difference in the white blood cell content between the two groups(P>0.05). The CD4~+/CD8~+,CD4~+and CD3~+of observation group at 14 days after operation and 1 month after the operation were significantly higher than those in the control group(P<0.05), and there was no significant difference in the CD8~+between the two groups(P>0.05). Conclusion: Splenic artery interventional embolization can improve the clinical effect in the treatment of traumatic spleen rupture, it can reduce the occurrence of postoperative complications and promote the recovery of immune function. [ABSTRACT FROM AUTHOR]

One hybridized combinations between 2 self lines as parents with different budding period were used to analyze the inheritance of budding period in their progeny family groups P1, P2, F1, B1, B2and F2by utilizing the method of joint segregation of major genes plus poly genes. The results showed that budding period in the cross of y145 x b145 was controlled by two major genes with additive-dominant-epistatic effects. The heritability of the major gene was 47. 22 % in B1 generation, 37. 95 % in B2 generation, and 46. 45 % in F2 generation. The major gene effects was important and should be utilized effectively in the breeding program. The improvement of budding period trait should be selected in middle and high generation. [ABSTRACT FROM AUTHOR]

The early bolting of tumorous stem mustard caused tremendous loss to mustard production，which became one of the major factors hampering the rapid and healthy development of the mustard industry. In the present study，bulked segregant analysis ( BSA) was used to identify the SSR markers related to bolting genes in the F2 generation of an early bolting cultivar ‘ 92 ' and a late bolting cultivar ‘ 203 ' of tumorous stem mustard. 600 pairs of Brassica genus SSR primers were used to identify the polymorphism，and one SSR marker 0112-D09 was found in the early bolting gene pool，with a close genetic distance of 10. 9 cM calculated by the kosambi function. The SSR marker identified in the present study can be used for molecular marker-assisted breeding in the early bolting of tuber mustard. The findings can also provide theoretical foundations for the breeding of bolting-resistant tuber mustard. [ABSTRACT FROM AUTHOR]