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A multiscale adaptive framework based on convolutional neural network: Application to fluid catalytic cracking product yield prediction

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Petroleum Science 2024年第04期21卷 2849-2869页

作者： Nan Liu Chun-Meng Zhu Meng-Xuan Zhang xing-ying Lan State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) College of Artificial Intelligence China University of Petroleum (Beijing)

Since chemical processes are highly non-linear and multiscale, it is vital to deeply mine the multiscale coupling relationships embedded in the massive process data for the prediction and anomaly tracing of crucial process parameters and production indicators. While the integrated method of adaptive signal decomposition combined with time series models could effectively predict process variables, it does have limitations in capturing the high-frequency detail of the operation state when applied to complex chemical processes. In light of this, a novel Multiscale Multi-radius Multi-step Convolutional Neural Network(Msrt Net) is proposed for mining spatiotemporal multiscale information. First, the industrial data from the Fluid Catalytic Cracking(FCC) process decomposition using Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN) extract the multi-energy scale information of the feature subset. Then, convolution kernels with varying stride and padding structures are established to decouple the long-period operation process information encapsulated within the multi-energy scale data. Finally, a reconciliation network is trained to reconstruct the multiscale prediction results and obtain the final output. Msrt Net is initially assessed for its capability to untangle the spatiotemporal multiscale relationships among variables in the Tennessee Eastman Process(TEP). Subsequently, the performance of Msrt Net is evaluated in predicting product yield for a 2.80 × 10～6 t/a FCC unit, taking diesel and gasoline yield as examples. In conclusion, Msrt Net can decouple and effectively extract spatiotemporal multiscale information from chemical process data and achieve a approximately reduction of 30% in prediction error compared to other time-series models. Furthermore, its robustness and transferability underscore its promising potential for broader applications.

关键词： Fluid catalytic cracking Product yield Data-driven modeling Multiscale prediction Data decomposition Convolution neural network

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Efficacy and safety of percutaneous transhepatic biliary radiofrequency ablation in patients with malignant obstructive jaundice

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World Journal of Clinical Cases 2024年第17期12卷 2983-2988页

作者： ying xing Zheng-Rong Liu You-Guo Li Hong-Yi Zhang Department of General Surgery Tiantan HospitalBeijing 100170China

BACKGROUND Percutaneous transhepatic cholangiodrainage(PTCD)and endoscopic retrograde cholangiopancreatography/endoscopic nasobiliary drainage are the most common clinical procedures for jaundice control in patients with unresectable malignant obstructive jaundice,yet the safety and effect of endobiliary radiofrequency ablation(EB-RFA)combined PTCD is rarely reported,in this article,we report our experience of EB-RFA combined PTCD in such *** To retrospectively study the efficacy and safety of EB-RFA combined PTCD in patients with unresectable malignant obstructive *** Patients with unresectable malignant obstructive jaundice treated with EB-RFA under PTCD were selected,the bile ducts of the right posterior lobe was selected as the target bile ducts in all *** general conditions of all patients,preoperative tumour markers,total bilirubin(TBIL),direct bilirubin(DBIL),albumin(ALB),alkaline phosphatase(ALP),and glutamyl transferase(GGT)before and on the 7th day after the procedure,as well as perioperative complications,stent patency time and patient survival were *** All patients successfully completed the operation,TBIL and DBIL decreased significantly in all patients at the 7th postoperative day(P=0.009 and 0.006,respectively);the values of ALB,ALP and GGT also decreased compared with the preoperative period,but the difference was not statistically *** biliary bleeding occurred in 2 patients,which was improved after transfusion of blood and other conservative treatments,pancreatitis appeared in 1 patient after the operation,no serious complication and death happened after *** for 3 patients with loss of visits,the stent patency rate of the remaining 14 patients was 100%71%and 29%at the 1^(st),3^(rd),and 6^(th)postoperative months respectively,with a median survival of 4 *** EB-RFA under PTCD in patients with unresectable malignant obstructive jaundice has a satisfactory therapeu

关键词： Biliary tract tumour Malignant obstructive jaundice Percutaneous transhepatic cholangiodrainage Endoluminal radiofrequency ablation Biliary radiofrequency ablation

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Analysis of long-term outcome of modified gastric bypass for type 2 diabetes mellitus in Chinese patients

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World Journal of Clinical Cases 2024年第25期12卷 5697-5705页

作者： ying xing Ri-xing Bai You-Guo Li Jun Xu Zhi-Qiang Zhong Ming Yan Wen-Mao Yan Department of General Surgery Beijing Tiantan HospitalBeijing 100170China

BACKGROUND Bariatric and metabolic surgery have been routinely performed following the rapid increase in obesity and metabolic diseases *** all evolving procedures,Roux-en-Y gastric bypass(RYGB)is considered the gold standard for surgical treatment of patients with type 2 diabetes mellitus(T2DM)and *** was introduced in China nearly 20 years ago,but the number of RYGB surgeries only accounts for 3.1%of the total number of weight loss and metabolic surgeries in China,it’s effect on Chinese people still needs further *** To investigate the effect and safety of a modified gastric bypass performed in Chinese patients with *** Patients with obesity and T2DM who underwent modified gastric bypass,with>5-year follow-up data,were *** All 37 patients underwent uneventful laparoscopic surgery,no patient was switched to laparotomy during the surgery,and no severe complications were *** weight and body mass index of the patients reduced from 84.6±17.3(60.0–140.0)kg and 30.9±5.0(24.7–46.2)kg/m2 to 67.1±12.2(24.7–46.2)kg and 24.6±3.9(17.7–36.5)kg/m2,respectively,and fasting plasma glucose and glycated hemoglobin decreased from 7.4±3.4 mmol/L and 8.2%±1.7%preoperatively to 6.5±1.3 mmol/L and 6.5%±0.9%5-years postoperatively,*** 29.7%(11/37)of the patients used hypoglycemic drugs 5-years postoperatively,and the complete remission rate of T2DM was 29.7%(11/37).Triglyceride level reduced significantly but high-density lipoprotein increased significantly(both P<0.05)compared with those during the preoperative *** and renal function improved significantly postoperatively,and binary logistic regression analysis revealed that the patients’preoperative history of T2DM and fasting C-peptide were significant prognostic factors influencing complete T2DM remission after RYGB(P=0.006 and 0.012,respectively).CONCLUSION The modified gastric bypass is a safe and feasible procedure for Chinese patients with obesity an

关键词： Laparoscopic Roux-en-Y gastric bypass Chinese patients Metabolic surgery Bariatric surgery Type 2 diabetes mellitus

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重塑乡味:数字技术视阈下中国乡土电影的符号隐喻与叙事策略

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云南社会科学 2024年第4期 181-188页

作者：唐卫李映星东华大学服装与艺术设计学院

城镇化进程加速,进一步拉大城乡差距,加深乡村与城市文明间的二元对立。中国乡土电影作为文化产业独具中国特色的创作类型,深耕乡土文化资源,诗性地反映出不同社会环境的独特风貌与发展状态。乡土文明通过电影这一媒介完成编码,形成具... 详细信息

城镇化进程加速,进一步拉大城乡差距,加深乡村与城市文明间的二元对立。中国乡土电影作为文化产业独具中国特色的创作类型,深耕乡土文化资源,诗性地反映出不同社会环境的独特风貌与发展状态。乡土文明通过电影这一媒介完成编码,形成具有表意性的艺术语言,逐渐成为当代人了解乡村文明,实现“精神返乡”的重要途径。而数字技术快速发展,为乡土电影提供更多维度的探索空间,在表现技法与内容上实现突破,延伸审美价值。通过电影符号学相关理论,可以剖析当代优秀乡土电影的符号隐喻与叙事特点,提出数字技术视阈下,典型人物符号、乡土文化符号拓展出多元创新选择,以及传统底层叙事、空间叙事呈现出交织融合的积极转变,由此进一步挖掘乡土电影背后不断变化的新时代乡土文化内涵,总结出传承创新优秀乡土文化符码,善用进步数字技术设计工具,二者相结合的中国乡土电影创作未来发展和启示。

关键词：电影符号学乡土文化数字技术符号隐喻叙事策略

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Effect of psychological nursing intervention combined with acupressure on postoperative recovery of women after cesarean section

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World Journal of Clinical Cases 2024年第21期12卷 4527-4535页

作者： xing-ying Liu Xiao-Bo Chen You-Liang Wen Xiao-Ping Guo Xiao-Bin Zhou Department of Rehabilitation Medicine Second Affiliated Hospital of Gannan Medical UniversityGanzhou 341000Jiangxi ProvinceChina Rehabilitation Therapy Teaching and Research Office Rehabilitation College of Gannan Medical UniversityGanzhou 341000Jiangxi ProvinceChina Dermatology and Plastic Surgery Department First Affiliated Hospital of Gannan Medical UniversityGanzhou 341000Jiangxi ProvinceChina

BACKGROUND Psychological intervention nursing(PIN)has been considered to have a curative effect on cesarean section(CS)post-operative ***,the therapeutic mechanisms remain *** To explore the effects of PIN combined with acupressure massage on CS postoperative *** A retrospective study was conducted on 150 pregnant women admitted to an obstetrics department between January 2020 and January *** control group(CG)received acupressure therapy(n=73),and the intervention group(IG)received acupressure therapy and PIN therapy(n=77).Postoperative recovery time was assessed by anal-exhausting,defecation,bed activity,breastfeeding,and hospital stay *** effects,including infection,bleeding,limb numbness,intrauterine hematoma,urinary retention,and venous thromboembolism,were *** pain visual analogue scale(VAS)was used to evaluate the degree of *** and depression status were qualitatively assessed using the selfrating anxiety scale(SAS),self-rating depression scale(SDS),and Edinburgh postpartum depression scale(EPDS).The Pittsburgh sleep quality index(PSQI)was used to compare sleep quality between the *** The baseline data and SAS,SDS,EPDS,and PSQI scores did not significantly differ before CS(P>0.05)and neither did complication rates between the two groups after CS(P>0.05).However,anal-exhausting,defecation,waking up,breastfeeding,and hospitalization times were significantly shorter for participants in the IG than those for participants in the CG(P<0.05).The VAS,SAS,SDS,EPDS,and PSQI scores of the IG were significantly lower than those of the CG(P<0.05).CONCLUSION PIN,combined with acupressure massage,effectively promotes maternal recovery,reduces post-CS pain,and improves post-operative negative emotions and sleeping quality.

关键词： Psychological intervention nursing Acupressure massage Cesarean section Negative emotions Sleep quality

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磁混凝工艺处理燃煤电厂脱硫废水应用研究

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现代化工 2024年第S01期44卷 226-228,234页

作者：徐峰徐应星国能水务环保有限公司南京分公司江苏南京210004

采用磁混凝技术对燃煤电厂脱硫废水开展实验室和中试实验研究。通过实验室研究优化了磁混凝工艺的药剂投加量等工艺参数;在实验室数据的基础上,通过中试实验验证了磁混凝技术处理燃煤电厂脱硫废水的可行性并评价了该技术的经济性优势。

关键词：磁混凝脱硫废水零排放固液分离

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上海市海上风电发展面临挑战及建议的相关探讨

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上海节能 2024年第7期 1049-1053页

作者：邢颖上海市节能减排中心有限公司

上海市作为我国重要的沿海城市,深入落实国家“双碳”战略,积极发展可再生能源,已获批规划千万千瓦级海上风电项目。海上风电将成为上海市后续可再生能源发展的重要方向之一。通过对海上风电应用及产业基础等的分析,提出目前海上风电发... 详细信息

上海市作为我国重要的沿海城市,深入落实国家“双碳”战略,积极发展可再生能源,已获批规划千万千瓦级海上风电项目。海上风电将成为上海市后续可再生能源发展的重要方向之一。通过对海上风电应用及产业基础等的分析,提出目前海上风电发展面临的挑战,并就后续发展提出相关建议,希望能够对上海市海上风电发展提供借鉴。

关键词：海上风电可再生能源挑战发展建议

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火星进入流场特性中红外吸收光谱诊断研究

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光谱学与光谱分析 2024年第5期44卷 1277-1282页

作者：曾徽文鹏杨国铭朱兴营欧东斌中国航天空气动力技术研究院电弧等离子应用装备北京市重点实验室北京100074

火星探索项目是我国深空探测工程的重要组成部分,“天问一号”2021年成功着陆火星,是中国航天在火星探索研究迈出的一大步。火星大气的气氛主要以二氧化碳为主,表面气压远低于地球大气,由于大气成分和进入轨道的差异,火星进入器面临的... 详细信息

火星探索项目是我国深空探测工程的重要组成部分,“天问一号”2021年成功着陆火星,是中国航天在火星探索研究迈出的一大步。火星大气的气氛主要以二氧化碳为主,表面气压远低于地球大气,由于大气成分和进入轨道的差异,火星进入器面临的热环境同地球返回器有很大不同,其进入过程为非空气介质的高速流动,将产生严重的气动防热问题。利用电弧风洞模拟火星进入器气动加热环境,是开展火星探测防热系统设计的关键。电弧风洞模拟火星进入高温过程,其主要过程是CO_(2)主导的离解反应,并且CO等高温离解组分与火星进入器防热材料相互作用,产生的催化效应会显著影响气动热环境。利用中红外量子级联激光吸收光谱测量技术,开展电弧加热火星进入流场特性的在线定量研究。电弧加热在线诊断研究利用CO在4.5μm附近中心波长为2212.625 cm^(-1)(v″=0,R(19))的谱线,实现了对火星地面流场的高信噪比测量,采用单线-直接吸收光谱诊断技术获得了自由流静温和关键组分CO摩尔浓度的实时测量结果。典型状态下,火星进入流场自由流静温和CO摩尔组分浓度在整个运行时间内保持稳定,显示出电弧加热流场良好的稳定性。六组重复试验显示自由流静温和CO摩尔组分浓度分别在(1757±69)K和(0.189±0.027)范围内,自由流温度波动≤3.9%,CO组分浓度波动≤14.3%,证明电弧风洞建立的火星地面流场具有非常好的重复性。基于该研究发展的电弧风洞中红外激光吸收光谱诊断技术,可以为研究火星进入器气动热环境和防热材料烧蚀-催化特性提供精细化测量能力。

关键词：火星进入电弧风洞中红外激光吸收光谱气流温度组分浓度

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新型压力驱动高倍膜浓缩技术在废水零排放处理中的应用研究

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现代化工 2024年第8期44卷 221-223,227页

作者：徐峰徐应星何灿国能水务环保有限公司南京分公司江苏南京210004 北京纳思利万环保科技有限公司北京102211

采用高倍膜浓缩技术对燃煤电厂脱硫废水零排放系统反渗透浓水进行深度浓缩处理中试试验研究。通过168 h连续运行测试,验证了高倍膜浓缩技术在6~7 MPa的运行压力下将浓盐水浓缩至100 g/L以上的可行性。现场连续运行测试结果表明,高倍膜... 详细信息

采用高倍膜浓缩技术对燃煤电厂脱硫废水零排放系统反渗透浓水进行深度浓缩处理中试试验研究。通过168 h连续运行测试,验证了高倍膜浓缩技术在6~7 MPa的运行压力下将浓盐水浓缩至100 g/L以上的可行性。现场连续运行测试结果表明,高倍膜浓缩工艺具有浓缩极限高、操作压力低、系统运行稳定的特点,可用于废水零排放反渗透浓水的减量化处理。

关键词：反渗透高倍膜浓缩零排放减量化

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巨脾外科治疗现状与介入治疗序贯手术策略

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中华肝脏外科手术学电子杂志 2024年第3期13卷 253-258页

作者：邢颖程石首都医科大学附属北京天坛医院普通外科 100070

巨脾是门静脉高压症等疾病常见的合并症,其导致的脾功能亢进症和凝血功能异常等会对患者健康造成诸多影响,目前巨脾的治疗包括介入治疗和手术治疗,其中脾切除术是最为有效的治疗方案。近年来巨脾切除术多在腹腔镜下完成,尽管已有多种手... 详细信息

巨脾是门静脉高压症等疾病常见的合并症,其导致的脾功能亢进症和凝血功能异常等会对患者健康造成诸多影响,目前巨脾的治疗包括介入治疗和手术治疗,其中脾切除术是最为有效的治疗方案。近年来巨脾切除术多在腹腔镜下完成,尽管已有多种手术入路和围手术期处理方案用于提高巨脾切除手术的安全性,但仍易引起腹腔出血、周围脏器损伤等并发症。对于伴有重度脾功能亢进症的巨脾患者先行介入治疗再序贯手术治疗可能是较好的治疗选择。

关键词：巨脾介入治疗腹腔镜脾切除术介入治疗序贯手术治疗策略

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