融合NSGA-II和CSA的多目标车间调度

针对在灵活车间系统中调度作业和自动引导车(automated guide vehicle,AGV)的同时调度问题,考虑在有限多个AGV和加工机台的情况下,以最小化最大完工时间、单个AGV搬运消耗时间及所有AGV搬运总消耗时间为目标函数,设计融合NSGA-II(non-dominated sorting genetic algorithms)和克隆选择(clonal selection algorithm,CSA)的改进算法INGCSA来解决此类问题。采用工件、加工机台和AGV三部分编码;引入非支配排序和目标函数值大小排序后总得分进行种群分层,从而有效地保留优秀个体;针对克隆后的种群,对不同等级的种群采取不同的变异概率,并对染色体进行内部交换与均匀交叉混合交换的基因重组,有效地提高了种群的多样性与防止陷入局部最优。通过三组对比实验,验证了该算法在探索最优解时,具有运行时间短、稳定性高和收敛性好等优点。

基于改进NSGA-II的轨道交通接驳公交线路优化

为解决接驳公交线路规划不合理和时间安排不完善的问题,提出了基于改进NSGA-II算法的环形接驳公交线路优化方法。首先,结合双层规划理论,以乘客出行时间成本最小化、公交企业运营收益和接驳公交服务率最大化为目标函数,以接驳公交线路站点数、线路长度和发车频率作为约束条件构建上层模型,采用Logit模型构建了下层接驳客流分配模型;其次,运用Floyd算法对NSGA-II算法的初始化种群进行了优化,针对所提出的模型设计了模型求解流程;最后,以哈尔滨市轨道交通1号线医大一院轨道交通站为案例,运用笔者提出的多目标双层规划模型和算法进行求解,并与原NSGA-II算法和基于Logistic混沌映射的NSGA-II算法进行对比。研究结果表明:基于Floyd算法改进的NSGA-II算法在多目标双层规划模型求解时,收敛速度更快效果更好,求解结果可以在Pareto前沿得到多个相互非支配的最优解;不同解集对应目标函数值不同,但可以达到接驳公交网络整体效益最优,采用折衷最优解集表述求解结果。

营心宁胶囊辅助治疗对冠心病心力衰竭患者血管紧张肽II水平和心功能的影响

目的:观察营心宁胶囊辅助治疗对冠心病心力衰竭患者血管紧张肽II (AngII)水平和心功能的影响。方法:将128例患者分为两组,对照组64例,治疗组64例。对照组予常规治疗,治疗组患者在此基础上加用营心宁胶囊治疗,每次4粒,每日3次。治疗前及治疗8周后检测血浆AngII、脑钠肽(BNP),并行心脏彩色多普勒超声心动图测定左室射血分数(LVEF)、左室舒张末期内径(LVEDD)和每搏输出量(SV)。结果:治疗组和对照组总有效率分别为92.2%和89.1% (P > 0.01);显效率分别为43.8%,32.8% (P < 0.01)。两组治疗后患者的AngII、BNP、LVEF、LVEDD和SV均较治疗前明显改善(P < 0.01或P < 0.05),且治疗组患者的改善水平优于对照组(P < 0.01)。结论:营心宁胶囊能有效降低患者AngII水平,并对心功能有改善作用。

血管紧张素II对脓毒症休克大鼠心脏功能的影响

本研究拟通过盲肠结扎穿孔制备大鼠脓毒症模型,观察血管紧张素II对脓毒症休克(sepsis-shock)大鼠心脏功能的影响。方法 48只(Sprague-Dawley,SD)雄性大鼠随机分为6组(n=8):对照(control)组、假手术(sham)组、脓毒症休克(SS)组、去甲肾上腺素(NE)治疗组、血管紧张素II (ANGII)治疗组。采用盲肠结扎穿孔制备脓毒症休克动物模型。监测大鼠心率、血压变化。监测过程中大鼠如出现平均动脉压下降至65mmHg以下,立即给予0.9%生理盐水进行液体复苏,观察10分钟后如效果不佳,按照分组给予不同血管活性药物泵入。分别在造模后6,12,18,24小时抽血行心肌酶学指标检测,同时在该时段行超声观察大鼠心脏超声检查。于术后24小时留取心脏组织进行氧化因子指标测定,并进行心脏组织病理学观察。结果 与对照组和假手术组对比,脓毒症休克、去甲肾上腺素组、血管紧张素组平均动脉压下降明显,液体复苏效果欠佳,需要血管活性药物干预。与对照组和假手术组对比,脓毒症休克、去甲肾上腺素组、血管紧张素II组炎症反应、乳酸指标明显升高,具有统计学差异(P<0.05)。脓毒症休克组与对照组、假手术组相比,心脏左室射血分数(LVEF)明显下降,具有统计学差异(P<0.05),应用血管活性药物后,左室射血分数明显提高,血管紧张素II组射血分数提高与脓毒症组相比,具有显著统计学差异(P<0.01)。脓毒症休克组与对照组、假手术组相比,心肌酶学指标明显升高,应用去甲肾上腺素或血管紧张素II干预后,心肌酶学指标下降,与脓毒症组相比,具有统计学差异(P<0.05),血管紧张素II组改善更为明显(P<0.01)。结论 血管紧张素II可改善脓毒症休克对大鼠的心肌损害,对脓毒症休克大鼠心肌有一定的保护作用。

表达Strep-tag II的重组塞内卡病毒的构建与鉴定

为构建表达Strep-tag II的重组塞内卡病毒(SVA),本研究在感染性cDNA克隆p SVA-I212V/S460L的基础上,采用重叠延伸PCR扩增Strep-tag II并采用无缝克隆法将其插入SVA VP1基因C端,构建感染性cDNA克隆,命名为p SVA-Strep,并采用双酶切和测序鉴定正确后,将p SVA-Strep转染BHK-21细胞拯救重组病毒,收集病变细胞上清,并将含有病毒的细胞上清和野生型SVA(SVA-WT)分别感染BHK-21细胞,以未感染病毒的BHK-21细胞作为阴性对照,感染后24 h分别以鼠源SVA VP2蛋白单克隆抗体(MAb)5D10(1∶1000)、鼠源Strep-tag II MAb(1∶2000)作为一抗,以FITC标记的山羊抗小鼠Ig G(1∶2000)为二抗,采用间接免疫荧光试验(IFA)对重组病毒鉴定。IFA结果显示,以鼠源SVA VP2蛋白MAb 5D10为一抗,SVA-WT和重组病毒感染的细胞均出现绿色荧光,以Strep-tag II MAb作为一抗时,仅有重组病毒感染的细胞出现绿色荧光,经SVA-WT感染的BHK-21细胞及阴性对照细胞均无绿色荧光,表明拯救了Strep-tag II标记的重组病毒,并将其命名为r SVA-Strep。将r SVA-Strep在BHK-21细胞中连续传10代,每隔2代采用引物VP1-F/R经PCR鉴定并对第10代重组病毒的VP1基因测序以鉴定r SVA-Strep的遗传稳定性。结果显示,每隔两代的重组病毒经PCR扩增后均出现约780 bp的目的条带,第10代重组病毒扩增的VP1基因测序结果显示Strep-tag II基因仍在重组病毒中,且无基因突变,表明r SVA-Strep的遗传稳定性较强;将SVA-WT和r SVA-Strep分别以MOI 0.01感染BHK-21细胞,在感染后4 h、8 h、12 h、24 h、36 h、48 h和72 h收获病毒测定病毒滴度并绘制生长曲线,结果显示在病毒感染36 h内r SVA-Strep和SVA-WT生长动力学基本一致,表明Strep-tag II的引入在病毒感染36 h内对SVA的复制基本无影响。采用0.2%甲醛充分灭活r SVA-Strep,并利用Strep-TactinRXT Purification纯化试剂盒纯化该灭活病毒,将r SVA-Strep灭活病毒上清加至Strep-Tactin亲和层析柱,分别用不同体积洗脱缓冲液依次洗脱病毒并通过western blot鉴定病毒的纯化效果。对纯化过程中不同洗脱液洗脱病毒的western blot结果显示,不同体积的洗脱液中E1、E2和E3均出现VP0和VP2两条带,且E1和E2的条带最明显,表明洗脱缓冲液的最佳洗脱体积约为2.2 CV;以上结果表明r SVA-Strep可通过Strep-Tactin亲和层析柱一步法纯化。本研究在SVA中插入Strep-tag II标签,为SVA灭活疫苗的快速纯化提供技术手段,也为其他病原的快速纯化方法的建立提供参考。

Hybrid treatment of varied orthodontic appliances for a patient with skeletal class II and temporomandibular joint disorders:A case report and review of literature

BACKGROUND The relation between orthodontic treatment and temporomandibular disorders(TMDs)is under debate;the management of TMD during orthodontic treatment has always been a challenge.If TMD symptoms occur during orthodontic treatment,an immediate pause of orthodontic adjustments is recommended;the treatment can resume when the symptoms are managed and stabilized.CASE SUMMARY This case report presents a patient(26-year-old,female)with angle class I,skeletal class II and TMDs.The treatment was a hybrid of clear aligners,fixed appliances and temporary anchorage devices(TADs).After 3 mo resting and treatment on her TMD,the patient’s TMD symptom alleviated,but her anterior occlusion displayed deep overbite.Therefore,the fixed appliances with TAD were used to correct the anterior deep-bite and level maxillary and mandibular deep curves.After the levelling,the patient showed dual bite with centric relation and maximum intercuspation discrepancy on her occlusion.After careful examination of temporomandibular joints(TMJ)position,the stable bite splint and Invisible Mandibular Advancement appliance were used to reconstruct her occlusion.Eventually,the improved facial appearance and relatively stable occlusion were achieved.The 1-year follow-up records showed there was no obvious change in TMJ morphology,and her occlusion was stable.CONCLUSION TMD screening and monitoring is of great clinical importance in the TMD susceptible patients.Hybrid treatment with clear aligners and fixed appliances and TADs is an effective treatment modality for the complex cases.

血管活性药物评分联合APACHE II评分对血流感染后脓毒性休克患者预后的预测价值

目的:探讨血管活性药物评分(vasoactive inotropic score, VIS)联合急性生理与慢性健康评分(APACHE II)对血流感染后脓毒性休克患者结局的预测价值,为临床提供参考。方法:采用回顾性研究方法,通过收集2020年1月至2022年12月安徽医科大学附属合肥医院重症医学科收治的185例脓毒性休克患者的临床资料,根据28 d转归情况,分为存活组95例和死亡组90例,记录所有患者性别、年龄、相关血液检测指标、SOFA评分、24小时内急性生理与慢性健康评分(APACHE II)及24小时内最大血管活性药物评分(VISmax24)等信息,采用单因素分析筛选脓毒性休克患者的相关危险因素,多因素logistic回归分析影响脓毒性休克患者预后的独立危险因素,采用受试者工作特征(receiver op-erating characteristic, ROC)曲线下面积(area under curve, AUC)分析各指标的诊断价值。结果:单因素分析结果表明:死亡组的APACHE II评分(24.30 ± 5.157)、VISmax24 [100.0 (53.5, 121.0)]明显高于存活组(P max24联合APACHE II评分(AUC = 0.848, 95% CI: 0.792~0.905),较单一的APACHE II评分(AUC = 0.729, 95% CI: 0.655~0.802)、VISmax24 (AUC = 0.783, 95% CI: 0.709~0.856)、乳酸(AUC = 0.665, 95% CI: 0.587~0.743)、SOFA (AUC = 0.680, 95% CI: 0.602~0.758)预测价值更高。结论:VISmax24联合APACHE II评分能更有效预测血流感染后脓毒性休克患者的预后。

维U颠茄铝镁片II+多潘立酮片治疗慢性胃炎对患者生活质量的改善探讨

探讨慢性胃炎患者经维U颠茄铝镁片II、多潘立酮片两者联用所得疗效,以及生活质量的改善情况。方法 80例患者均确诊“慢性胃炎”且在本校卫生所就诊,研究时段自2022年1月至2023年12月终止。依托随机性分组工具首先产生观察组,组内40例患者施行维U颠茄铝镁片II、多潘立酮片联合疗法;另外40例患者自然归入对照组,组内施行多潘立酮片单一疗法。分析治疗成效、首要症状、不良反应等多项数据,全方面印证两种疗法的差异性。结果 与对照组所统计数值相比,观察组在总疗效、生活质量(躯体疼痛、活力、情感职能、总体健康)方面显著处于更高水平(P<0.05);观察组患者首要症状(疼痛、恶心、烧灼感)消除相较于对照组更快(P<0.05),且组内统计不良反应发生率及半年内复发率依次为5.00%、2.50%,相较于对照组均处于较低水平(P<0.05)。结论 维U颠茄铝镁片II、多潘立酮片两者联用针对慢性胃炎疗效更为显著,患者首要症状能够尽早消除,从而恢复高质量生活,值得应用。

Biological function of miRNA-145-5p in angiotensin II induced renal inflammation

Objective:Chronic kidney disease(CKD)is a progressive disorder characterized by intricate structural and functional alterations in the kidneys,attributable to diverse causative factors.Notably,the therapeutic promise of miR-145-5p in addressing renal pathologies has been discerned.This investigation seeks to elucidate the functional role of miR-145-5p in injured kidneys by subjecting human glomerular mesangial cells(HGMCs)to stimulation with Angiotensin II(AngII).Materials and Methods:Cellular viability and the levels of inflammatory mediators were evaluated utilizing Cell Counting Kit-8(CCK-8),quantitative real-time polymerase chain reaction(qRT-PCR),and western blot methodologies,both in the presence of AngII incubation and in scenarios of miR-145p overexpression and downregulation.Furthermore,the cell cycle dynamics were elucidated through Fluorescence-activated Cell Sorting(FACS)analysis.Results:AngII incubation induced an upregulation of miR-145-5p and inflammatory factors including Intercellular Adhesion Molecule 1(ICAM-1),Interleukin 6(IL-6),Interleukin 8(IL-8),and Interleukin 1β(IL-1β).Additionally,it elevated the expression of Cyclin A2,Cyclin D1,and the G2/M cell cycle ratio.Conversely,inhibition of miR-145-5p heightened the levels of inflammatory factors and cell cycle regulators induced by AngII incubation.Reduced expression of miR-145-5p correlated with a downregulation of Interleukin 10(IL-10)expression,concurrently promoting HGMC proliferation under AngII stimulation.Moreover,ectopic miR-145-5p expression demonstrated a reduction in inflammatory factors,cell cyclin regulators,G2/M cell cycle ratio,and overall proliferation.Conclusion:MiR-145-5p exhibited inhibitory effects on the inflammatory response and proliferation induced by Angiotensin II in HGMCs,showcasing its potential as a therapeutic avenue for the treatment of kidney injury.

Billroth II anastomosis combined with brown anastomosis reduce reflux gastritis in gastric cancer patients

BACKGROUND The surgeon performing a distal gastrectomy,has an arsenal of reconstruction techniques at his disposal,Billroth II among them.Braun anastomosis performed during a Billroth II procedure has shown evidence of superiority over typical Billroth II,in terms of survival,with no impact on postoperative morbidity and mortality.AIM To compare Billroth II vs Billroth II and Braun following distal gastrectomy,regarding their postoperative course.METHODS Patients who underwent distal gastrectomy during 2002-2021,were separated into two groups,depending on the surgical technique used(Billroth II:74 patients and Billroth II and Braun:28 patients).The daily output of the nasogastric tube(NGT),the postoperative day that NGT was removed and the day the patient started per os feeding were recorded.Postoperative complications were at the same time noted.Data were then statistically analyzed.RESULTS There was difference in the mean NGT removal day and the mean start feeding day.Mean total postoperative NGT output was lower in Braun group(399.17 mL vs 1102.78 mL)and it was statistically significant(P<0.0001).Mean daily postoperative NGT output was also statistically significantly lower in Braun group.According to the postoperative follow up 40 patient experienced bile reflux and alkaline gastritis from the Billroth II group,while 9 patients who underwent Christodoulidis G et al.Billroth II and Braun compared with Billroth II WJM https://www.wjgnet.com 2 March 20,2024 Volume 14 Issue 1 Billroth II and Braun anastomosis were presented with the same conditions(P<0.05).CONCLUSION There was evidence of superiority of Billroth II and Braun vs typical Billroth II in terms of bile reflux,alkaline gastritis and NGT output.

Impacts of angiotensin II on retinal artery changes in apolipoprotein E deficient mice

AIM:To investigate the impacts of angiotensin II(Ang II)on retinal artery changes in apolipoprotein E deficient(apoE^(-/-))mice.METHODS:ApoE^(-/-)male mice were infused by minipumps with Ang II at 1000 ng/kg·min(Ang II group)or saline(control group)for 28d.They were underwent ophthalmic fundus examination on day 0,14,and 28 of infusion.Histopathologic examination,ribonucleic acid(RNA)sequencing and local Ang II measurement of retinas were conducted.RESULTS:Ophthalmic fundus examination showed Ang II infusion promoted the formation of retinal arterial aneurysm-like lesions on day 28.Optical coherence tomography revealed the ganglion cell and inner plexiform layer(GCIPL)thickness in the control group was significantly thinner than that in Ang II group(P<0.001).Hematoxylin-eosin staining demonstrated diffused swelling of GCIPL layer and its disordered structure in Ang II group.Transmission electron microscopy showed Ang II infusion caused aggravation of atherosclerotic lesions,including increased swelling,roughness,disorganization of the retinal vasculature,and vacuoles formation.RNA-sequencing and gene ontology enrichment analysis demonstrated that the structure and function of cellular membrane might be disturbed and visual function might be compromised by Ang II.The local level of Ang II was higher in Ang II infusion group but did not show significant differences compared to the control group(P=0.086).CONCLUSION:Ang II infusion promotes the formation of retinal arterial aneurysm-like lesions in apoE^(-/-)mice,causing aggravation of atherosclerotic lesions,more severe disorganization of the retinal vasculature and disturbance of the cellular membrane.

Influence of Angiotensin II on α1-Adrenergic Receptors Function in Rat Aorta and Expression in Vascular Smooth Muscle Cells

Angiotensin II (Ang II) is the main mediator of the Renin-Angiotensin-System acting on AT1 and other AT receptors. It is regarded as a pleiotropic agent that induces many actions, including functioning as a growth factor, and as a contractile hormone, among others. The aim of this work was to examine the impact of Ang II on the expression and function of α1-adrenergic receptors (α1-ARs) in cultured rat aorta, and aorta-derived smooth muscle cells. Isolated Wistar rat aorta was incubated for 24 h in DMEM at 37˚C, then subjected to isometric tension and to the action of added norepinephrine, in concentration-response curves. Ang II was added (1 × 10−5 M), and in some experiments, 5-Methylurapidil (α1A-AR antagonist), AH11110A (α1B-AR antagonist), or BMY-7378 (α1D-AR antagonist), were used to identify the α1-AR involved in the response. Desensitization of the contractile response to norepinephrine was observed due to incubation time, and by the Ang II action. α1D-AR was protected from desensitization by BMY-7378;while RS-100329 and prazosin partially mitigated desensitization. In another set of experiments, isolated aorta-derived smooth muscle cells were exposed to Ang II and α1-ARs proteins were evaluated. α1D-AR increased at 30 and 60 min post Ang II exposure, the α1A-AR diminished from 1 to 4 h, while α1B-AR remained unchanged over 24 h of Ang II exposure. Ang II induced an increase of α1D-AR at short times, and BMY-7378 protected α1D-AR from desensitization.

Analysis of the Antidepressant Effects and Mechanisms of Icariin II Based on The GABAergic Nervous System

This article summarized the research progress on the antidepressant mechanism of icariin II,mainly elaborating on its mechanism from five aspects:GABAergic nervous system,inflammatory response,oxidative stress,neurotrophic factors,and neurotransmitters in the brain.Its clinical application value was further explored to provide a theoretical basis for the development and utilization of icariin II in treating depression.

渐近II型删失下广义半逻辑分布的统计推断

本文主要研究了广义半逻辑分布在渐近II型删失下的统计推断问题。首先,我们介绍了广义半逻辑 分布的概念和性质,然后提出了渐近II型删失机制。 接着,我们详细推导了在渐近II型删失下,使 用最大似然估计和贝叶斯方法估计广义半逻辑分布参数的过程。 最后,通过数值模拟和实际数据 分析,验证了所提出方法的有效性和适用性。

Case Report: Carnitine Palmitoyl Transferase II (CPT II) Deficiency

Carnitine Palmitoyl Transferase II (CPTII) is a very important enzyme that helps with the oxidation of long-chain fatty acid to produce energy. Deficiency in CPTII will lead to energy deficiency in the case of fasting and the accumulation of the long chain fatty in the body. There are three types of CPT II deficiency, the myopathic form, the severe infantile hepatocardiomuscular form and the lethal neonatal form. They are all inherited as an autosomal recessive. Diagnosis of the CPTII are 1) tandem mass spectrometry (MS/MS) in adult form and 2) CPTII polymorphism (F352C), which is linked to reducing the activity of CPTII in infantile form [1]. Glucose is the primary management and medium-chain fatty acid is an alternative due to the bypass of the CPTII enzyme in the pathway. For the prevention of CPTII deficiency are to avoid long chain fatty acid (C12-fatty acid), fasting, prolonged exercise, known triggers, and certain medications such as anti-epileptics and general anesthesia. During the rhabdomyolysis and myoglobinuria attack, it is very important to maintain hydration to avoid acute renal failure. If, however, renal failure occurs, dialysis is recommended. We present a case of a 27-year-old African American woman with the significant past medical history of CPT II deficiency leading to recurrent rhabdomyolysis and myoglobinuria. Together with all the research studies from diagnosis to treatment of CPTII deficiency will help in clinical management of patients. And this case report will add to the existing case reports of patients who have CPTII deficiency in terms of how we diagnose, how we treat, and how we prevent symptoms from re-occurring.

影响II-III期结直肠癌患者生存的因素分析

分析影响II-III期结直肠癌患者生存的因素。方法 回顾性分析柳州市鹿寨县人民医院进行治疗的II-III期结直肠癌患者(110例),2017年5月至2021年8月为病例选取时间,并对所有纳入人员进行为期2年的随访,以分析影响其生存时间的因素。结果 性别、年龄、文化程度、烟酒史、家族史、肿瘤位置均P>0.05,非影响此类患者生存的高危指标;肿瘤分化程度、TNM分期、脉管侵犯、神经侵犯及手术方式均P<0.05,为影响此类患者生存的高危指标;COX逐步回归法结果显示,低肿瘤分化程度、TNM Ⅲ期、姑息性切除术、有脉管侵犯及神经侵犯均可作为影响II-III期结直肠癌患者生存的独立危险因素,P<0.05。结论 在II-III期结直肠癌患者中,低肿瘤分化程度、TNM Ⅲ期、姑息性切除术、有脉管侵犯及神经侵犯均可作为此疾病患者生存时间的影响因素,并可作为临床评估此疾病的相关指标。

基于NIELVISII+平台的超声波传感器温度分布测量技术研究

通过对超声波传感器温度分布测量技术的研究了解,我们发现其作为一种非接触式测温方式,在高温、高腐蚀等恶劣环境中具有广泛的应用。超声波传播速度和衰减量可用于计算被测物体内部的温度分布,实现温度测量。相比传统的接触式测温法,超声测温法无需与被测对象直接接触,避免了传感器受到高温环境影响的问题,因此提高了测量的精度,并扩大了测温范围和深度。基于此,本文进行了NI ELVIS II+平台的超声波传感器温度分布测量技术研究,超声波传感器温度分布测量原理分析。本文得到了气体介质的温度和声波速度之间的函数关系,并据此建立了声学测温模型,从而实现温度的准确测量和检测。超声波温度检测系统的总体设计。根据相关的技术指标,对相关测温原理进行详细分析,对相位差法和飞行时间法两种测温方案进行了深入阐述,并且比较两种方案的优缺点及适用范围,在此基础上提出了基于相位差法的设计方案,依据此,最终给出系统总体设计方案。

氧化石墨烯(GO)表面原位生长二硫化钼(MoS2)材料高效去除Hg(II)

Hg(II)指的是游离的Hg2+及其不稳定的络合物,是厌氧条件下微生物将其转化为毒性更大的甲基汞的主要形式。作为一种超毒性重金属,Hg(II)可对肾脏、肝脏、免疫系统、内分泌系统以及生殖系统造成不可逆的损伤。在此文章中,以氧化石墨烯(GO)为基底,以L-半胱氨酸、钼酸铵、聚乙烯吡咯烷酮(PVP)、葡萄糖为原料,利用水热法于氧化石墨烯(GO)表面原位生长二硫化钼(MoS2)制备GO改性材料(MoS2/GO)。通过扫描电子显微镜(SEM)和x射线光电子能谱(XPS)表征得到MoS2/GO为石墨烯表面原位生长的层状放射性花状结构,对Hg(II)有较好的吸附作用且吸附后MoS2/GO有明显形态变化。MoS2/GO在较宽pH范围内对Hg(II)均有良好的吸附能力,拟二级动力学模型可以更好的描述该吸附过程,这证明MoS2/GO对Hg(II)之间的结合主要为化学作用。Freundlich模型可以很好的描述Hg(II)的吸附行为为多层吸附,PVP作为插层剂起到了一定的作用,25℃下MoS2/GO对Hg(II)的最大吸附容量为868.38 mg/g。该材料原料毒性小、MoS2层间距相对较大,对Hg(II)有着更为优异的去除能力,可较好的应用在含Hg废水处理中。

改进自适应渐进 II 型删失下 Chen 分布的贝叶斯分析

本文基于改进的自适应渐进 II 型删失,对 Chen 分布进行了贝叶斯分析。首先利用 EM 算法得 到了参数的极大似然估计。针对共轭和非共轭的四种信息先验,运用大方差和遗传算法确定了先 验的超参数。进而根据 Metropolis-Hastings 算法实现了后验分布样本的抽取。最后,通过真实 数据集对不同先验下的贝叶斯估计性能进行比较并得出了相应的结论。

新文科背景下民办本科英语专业《英语听力II》应用型课程教学改革与实践

新文科背景下,《英语听力II》作为民办本科英语专业的一门必修课程,主要旨在促进学生英语听力发展,提高英语听说综合运用能力,以学校培养高质量应用型人才为目标,对本课程进行应用型课程教学改革与实践,通过线上线下相结合的混合式教学方式,基于听力单元不同专题融入课程思政元素,坚持正确价值引领,不断优化课程教学内容,改进教学方法,以提高课程教育教学质量和水平,培养出符合国家战略要求和社会各行各业需求的新时代外语类应用型复合人才。