Study on the Safety and Prevention Technology of Coal Mining under the River in Xingyuan Coal Mine

Coal mining-induced surface subsidence poses significant ecological and infrastructural challenges, necessitating a comprehensive study to ensure safe mining practices, particularly in underwater conditions. This project aims to address the extensive impact of coal mining on the environment, infrastructure, and overall safety, focusing on the Shigong River area above the working face. The study employs qualitative and quantitative analyses, along with on-site engineering measurements, to gather data on crucial parameters such as coal seam characteristics, roof rock lithology, thickness, water resistance, and structural damage degree. The research encompasses a multidisciplinary approach, involving mining, geology, hydrogeology, geophysical exploration, rock mechanics, mine surveying, and computational mathematics. The importance of effective safety measures and prevention techniques is emphasized, laying the foundation for research focused on the Xingyun coal mine. The brief concludes by highlighting the potential economic and social benefits of this project and its contribution to valuable experience for future subsea coal mining.

Erosion and Sediment Production in Small Watershed in Purple Hilly Areas and Prevention Techniques

Purple Soil distributes extensively and mainly in China. Because of abundant easily weatherable parent rocks/materials and unstable soil structure, and also influenced by parent materials, usage systems, and slope gradients, erosion and sediment production of purple soils are very severe with main fashions of water erosion and gravitational erosion. Basing on observed data in small watersheds, rainfall erosivity,vegetation coverage, previous soil water content, flow and relating factors such as climate, topograph of small watershed,land usage, and soil kinds are all the influence factors of erosion and erodibility of purple soil as well as sediment production and transport in small watershed of purple hilly areas.The effective technological countermeasures of ecosystem restoration, agricultural tillage for water conservation and erosion prevention, agriculture project, and soil changing for fertility and anti-erosion were provided.

Field Identification and Prevention and Control Techniques of Citrus Huanglongbing of Orah Mandarin

In order to promote the development of Orah mandarin industry in Guangxi and reduce the harm of citrus huanglongbing to Orah mandarin,the pathogen,characteristics,occurrence regularity and field symptoms of citrus huanglongbing were summarized,and scientific prevention and control measures were put forward,such as strict implementation of quarantine system,cultivation and use of disease-free seedlings,strengthening field management,timely control of psyllid,timely removal of diseased trees,etc.

Species and Control Techniques of Main Diseases and Insect Pests of Camellia oleifera in Anhui Province

[Objectives]The paper was to master the species,incidence regularity and control techniques of main diseases and insect pests of Camellia oleifera in Anhui Province.[Methods]The species of main diseases and insect pests of C.oleifera in major C.oleifera afforestation bases and seedling bases in Anhui Province were investigated through field survey and literature search.Afterwards,the symptom characteristics,occurrence regularity and harms of diseases and insect pests were analyzed,and scientific and reasonable control techniques were put forward.[Results]The main diseases of C.oleifera in Anhui Province were soft rot disease,blister blight,anthracnose,sooty blotch,etc.,and the main insect pests were Euproctis pseudoconspersa,Biston marginata,Hypomeces squamosus,Curculio chinensts,Chrenoma atritarsis,etc.The control techniques mainly included ecological regulation,physical prevention and control,chemical prevention and control,and biological prevention and control.[Conclusions]The results will promote the high-quality development of C.oleifera industry in Anhui Province,and contribute to the improvement of China s edible vegetable oil supply and national grain and oil security.

Micro-power negative pressure wound technique reduces risk of incision infection following loop ileostomy closure

BACKGROUND Prophylactic loop ileostomy is an effective way to reduce the clinical severity of anastomotic leakage following radical resection of rectal cancer.Incisional surgical site infection(SSI)is a common complication after ileostomy closure.AIM To evaluate the efficacy and safety of the micro-power negative pressure wound technique(MPNPWT)in preventing incisional SSI.METHODS This was a prospective,randomized controlled clinical trial conducted at a single center.A total of 101 consecutive patients who underwent ileostomy closure after rectal cancer surgery with a prophylactic ileostomy were enrolled from January 2019 to December 2021.Patients were randomly allocated into an MPNPWT group and a control group.The MPNPWT group underwent intermittent suturing of the surgical incision with 2-0 Prolene and was covered with a micro-power negative pressure dressing.The surgical outcomes were compared between the MPNPWT(n=50)and control(n=51)groups.Risk factors for incisional SSI were identified using logistic regression.RESULTS There were no differences in baseline characteristics between the MPNPWT(n=50)and control groups(n=51).The incisional SSI rate was significantly higher in the control group than in the MPNPWT group(15.7%vs 2.0%,P=0.031).However,MPNPWT did not affect other surgical outcomes,including intra-abdominal complications,operative time,and blood loss.Postoperative hospital stay length and hospitalization costs did not differ significantly between the two groups(P=0.069 and 0.843,respectively).None of the patients experienced adverse effects of MPNPWT,including skin allergy,dermatitis,and pain.MPNPWT also helped heal the infected incision.Our study indicated that MPNPWT was an independent protective factor[odds ratio(OR)=0.005,P=0.025)]and diabetes was a risk factor(OR=26.575,P=0.029)for incisional SSI.CONCLUSION MPNPWT is an effective and safe way to prevent incisional SSI after loop ileostomy closure.

A Comparative Study and Performance Analysis of ATM Card Fraud Detection Techniques

ATM card fraud is increasing gradually with the expansion of modern technology and global communication. In the whole world, it is resulting in the loss of billions of dollars each year. Fraud detection systems have become essential for all ATM card issuing banks to minimize their losses. The main goals are, firstly, to review alternative techniques that have been used in fraud detection and secondly compare and analyze these techniques that are already used in ATM card fraud detection. Recently different card security systems used different fraud detection techniques;these techniques are based on neural network, genetic algorithm, hidden Markov model, Bayesian network, decision tree, clustering method, support vector machine, etc. According to our survey, the most important parameters used for comparing these fraud detection systems are accuracy, speed and cost of fraud detection. This study is very useful for any ATM card provider to choose an appropriate solution for fraud detection problem and also enable us to build a hybrid approach for developing some effective algorithms which can perform properly on fraud detection mechanism.

Anchor-wire technique for multiple plastic biliary stents to prevent stent dislocation

In endoscopic placement of multiple plastic biliary stents (PBSs),we sometimes experience proximal dislocation of the first PBS at the time of subsequent PBS insertion.We describe the case of a 79-year-old male with obstructive jaundice caused by cholangiocarcinoma who needed to receive multiple PBS placements for management of cholangitis.Although proximal dislocation of the first PBS was observed,we prevented the dislocation via our technique of using guidewire inserted from the distal end of the first PBS to the side hole as the anchor-wire.We could complete this technique only by inserting guidewire through the side hole of the first PBS during the process of releasing the first PBS and pulling out the guidewire and the inner sheath.It did not matter whether the anchor-wire went towards the third portion of the duodenum or the duodenal bulb.Here we introduce this "anchor-wire technique",which is useful for the prevention of PBS proximal dislocation in placing multiple PBSs.

Research Progress of Polymer Fire Extinguishing Gel and Its Application in Forest Fire Prevention

The paper summarizes the structure and water-absorbing mechanism,classification,and preparation method of polymer fire extinguishing gel,and prospects for its application in aerial firefighting,forest ground fire extinguishing,opening of firebreaks,and mitigating human casualties in forest fire extinguishing.

平行升压防灭火技术在采煤工作面启封及回采中的应用

徐矿集团新疆赛尔能源有限责任公司六矿A_(3)煤层埋藏较浅,A_(3)015综采工作面属易自燃厚煤层工作面,因受采动影响造成地表出现裂隙,形成采空区漏风通道,大量新鲜空气通过地表裂隙迅速涌入采空区,为遗煤提供氧气,工作面回采期间存在采空区遗煤自燃隐患,采取注氮、均压等综合防灭火措施,控制采空区遗煤自燃,达到预期效果。

册亨县香蕉主要病虫害调查

香蕉产业是册亨县乡村振兴的重要产业之一。随着香蕉种植的规模化发展,香蕉病虫害发生加重。本研究在2021—2023年对册亨县岩架镇、高洛街道、丫他镇香蕉病虫害的种类、分布及发生危害情况进行了调查。调查结果显示,册亨县香蕉主要病虫害有12种,其中:病害5种,分别是枯萎病、叶斑病、黑星病、炭疽病和软腐病;虫害有7种,分别是冠网蝽、象甲、花蓟马、褐足角胸叶甲、交脉蚜、斜纹夜蛾和弄蝶。通过调查,本文总结了册亨县12种主要香蕉病虫害的危害症状和危害程度,并提出了综合防控技术,以期为广大香蕉种植户提供参考。

动物莱姆病诊断与防治技术研究进展

莱姆病(Lyme disease)又名伯氏疏螺旋体病,是20世纪70年代发现的以蜱为传播媒介,由不同基因型伯氏疏螺旋体(Borrelia burgdorferi sensu lato)感染所致的人兽共患自然疫源性疾病,主要流行于温带和亚热带地区,犬、猫、马、牛、鹿等多种动物易感,人也是该病原菌的易感宿主。人患莱姆病时的主要症状为游走性红斑、关节炎和其他神经系统症状。患病动物常表现的症状是蜱叮咬部位被毛脱落、发热、蹄叶炎、跛行等。莱姆病流行广泛,但是诊断较为困难并极易造成误诊和漏诊。为避免莱姆病对畜牧业以及宠物行业造成不利影响,亟需提高对莱姆病的关注。因此,本文对动物莱姆病及其诊断和防治技术的研究进展进行综述,以期为动物莱姆病的准确、快速诊断和防治提供参考。

基于立体热成像的电磁驱动灭火弹设计

针对现有灭火弹灭火技术仍需人工操作,且具有延迟久、准度低、仅适用于明火环境等缺点,设计出一款基于立体热成像的电磁驱动灭火弹技术。该设计可通过数据插值以及三维成像原理确定当前区域内的最佳灭火点,并通过电磁炮驱动的形式使灭火弹垂直命中最佳灭火点,实现了在时间占用与灭火功能上的双重高效性,对于目前的灭火弹智能化领域以及潜在火灾的防范具有一定应用价值。

卵巢过度刺激综合征的发病机制及预防药物研究进展

卵巢过度刺激综合征(OHSS)是辅助生殖技术中常见的并发症之一,其发生机制尚未完全明确,内源性或外源性人绒毛膜促性腺激素(HCG)刺激卵巢释放大量的血管活性物质被认为是OHSS发病的核心环节。目前临床对OHSS的预防方法包括药物、个体化控制性促排卵、全胚冷冻、滑行疗法及未成熟卵母细胞体外成熟等手段,但仍未能完全预防OHSS的发生,且中重度OHSS对患者的生理及心理健康产生不利影响。因此,阐明OHSS的发病机制,发现可靠的预防方法,降低患者周期取消率及经济负担至关重要。本文将就OHSS的发病机制及预防药物研究进展进行综述,以期为OHSS的预防及治疗提供临床参考。

Review of the evolution and prevention of friction,wear,and noise for water-lubricated bearings used in ships

With the development of green tribology in the shipping industry,the application of water lubrication gradually replaces oil lubrication in stern bearings and thrust bearings.In terms of large-scale and high-speed ships,water-lubricated bearings with high performance are more strictly required.However,due to the lubricating medium,water-lubricated bearings have many problems such as friction,wear,vibration,noise,etc.This review focuses on the performance of marine water-lubricated bearings and their failure prevention mechanism.Furthermore,the research of marine water-lubricated bearings is reviewed by discussing its lubrication principle,test technology,friction and wear mechanism,and friction noise generation mechanism.The performance enhancement methods have been overviewed from structure optimization and material modification.Finally,the potential problems and the perspective of water-lubricated bearings are given in detail.

Advanced Optimized Anomaly Detection System for IoT Cyberattacks Using Artificial Intelligence

While emerging technologies such as the Internet of Things(IoT)have many benefits,they also pose considerable security challenges that require innovative solutions,including those based on artificial intelligence(AI),given that these techniques are increasingly being used by malicious actors to compromise IoT systems.Although an ample body of research focusing on conventional AI methods exists,there is a paucity of studies related to advanced statistical and optimization approaches aimed at enhancing security measures.To contribute to this nascent research stream,a novel AI-driven security system denoted as“AI2AI”is presented in this work.AI2AI employs AI techniques to enhance the performance and optimize security mechanisms within the IoT framework.We also introduce the Genetic Algorithm Anomaly Detection and Prevention Deep Neural Networks(GAADPSDNN)sys-tem that can be implemented to effectively identify,detect,and prevent cyberattacks targeting IoT devices.Notably,this system demonstrates adaptability to both federated and centralized learning environments,accommodating a wide array of IoT devices.Our evaluation of the GAADPSDNN system using the recently complied WUSTL-IIoT and Edge-IIoT datasets underscores its efficacy.Achieving an impressive overall accuracy of 98.18%on the Edge-IIoT dataset,the GAADPSDNN outperforms the standard deep neural network(DNN)classifier with 94.11%accuracy.Furthermore,with the proposed enhancements,the accuracy of the unoptimized random forest classifier(80.89%)is improved to 93.51%,while the overall accuracy(98.18%)surpasses the results(93.91%,94.67%,94.94%,and 94.96%)achieved when alternative systems based on diverse optimization techniques and the same dataset are employed.The proposed optimization techniques increase the effectiveness of the anomaly detection system by efficiently achieving high accuracy and reducing the computational load on IoT devices through the adaptive selection of active features.

Future clinical prospects of C-peptide testing in the early diagnosis of gestational diabetes

Gestational diabetes is typically diagnosed in the late second or third trimester of pregnancy.It is one of the most common metabolic disorders among expectant mothers,with potential serious short-and long-term complications for both maternal and offspring health.C-peptide is secreted from pancreatic beta-cells into circulation in equimolar amounts with insulin.It is a useful biomarker to estimate the beta-cell function because it undergoes negligible hepatic clearance and consequently it has a longer half-life compared to insulin.Pregnancy induces increased insulin resistance due to physiological changes in hormonal and metabolic homeostasis.Inadequate compensation by islet beta-cells results in hyperglycemia.The standard oral glucose tolerance test at 24-28 wk of gestation sets the diagnosis.Accumulated evidence from prospective studies indicates a link between early pregnancy C-peptide levels and the risk of subsequent gestational diabetes.Elevated C-peptide levels and surrogate glycemic indices at the beginning of pregnancy could prompt appropriate strategies for secondary prevention.

牛结核病诊断与防控的研究进展

牛结核病(bovine tuberculosis)是由结核分枝杆菌引起的人畜共患传染病,在全球范围内造成了严重的经济损失,危害公共卫生安全。对于牛结核病的防控,除了要加强饲养管理之外,还应及时地诊断并隔离患病动物,并为易感动物接种疫苗。文章就牛结核病的诊断技术和防治措施进行了综述,以期为牛结核病的诊断与防控提供参考。

大倾角综放采场遗留顶煤运移规律及防灭火技术

为研究大倾角综放采场遗留顶煤运移规律及裂隙扩展情况,以王家山煤矿中二401工作面为研究对象,采用物理相似模拟实验与数值模拟实验相结合的方法,深入分析大倾角综放采场遗留顶煤运移及裂隙发育规律。结果表明,大倾角综放采场遗留顶煤破碎和运移具有非对称性,工作面倾斜中下部应力与位移量均大于倾斜上部。遗留顶煤在采空区内沿倾斜方向呈现“顶煤—直接顶—顶煤”交替堆积形态,倾斜下部堆积量大于倾斜中上部。围岩裂隙发育范围广,随工作面推进最终可扩展至3号煤层。针对遗煤特征综合提出此类采场的“两阶段”防灭火技术措施,达到良好的防灭火效果,确保工作面安全高效生产。