检索结果-南通市图书馆

Rare Metals 2024年第3期43卷 1275-1287页

作者： Shao-le song Run-Qing Liu Miao-Miao Sun Ai-Gang Zhen Fan-Zhen Kong Yue Yang School of Minerals Processing and Bioengineering Central South UniversityChangsha410083China Zhejiang Tianneng New Materials Co. Ltd.Huzhou313103China

The recycling of cathode materials from spent lithium-ion battery has attracted extensive attention,but few research have focused on spent blended cathode *** reality,the blended materials of lithium iron phosphate and ternary are widely used in electric vehicles,so it is critical to design an effective recycling *** this study,an efficient method for recovering Li and Fe from the blended cathode materials of spent LiFePO_(4)and LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)batteries is ***,87%A1 was removed by alkali ***,91.65%Li,72.08%Ni,64.6%Co and 71.66%Mn were further separated by selective leaching with H_(2)SO_(4)and H_(2)O_(2).Li,Ni,Co and Mn in solution were recovered in the form of Li_(2)CO_(3)and hydroxide ***,98.38%Fe was leached from the residue by two stage process,and it is recovered as FePO_(4)·2H_(2)O with a purity of 99.5%by *** and P were present in FePO_(4)·2H_(2)O in amounts of 28.34%and 15.98%,***,the drift and control of various components were discussed,and cost-benefit analysis was used to assess the feasibility of potential application.

关键词： Spent lithium-ion battery Blended cathode materials Recovery Lithium carbonate Iron phosphate

脊椎侵袭性血管瘤^(18)F-FDG PET/CT表现

在线全文

学校读者我要写书评

暂无评论

中国医学影像技术 2024年第9期40卷 1400-1404页

作者：宋乐李慧张卫方北京大学第三医院核医学科北京100191

目的观察脊椎侵袭性血管瘤^(18)F-FDG PET/CT表现。方法回顾性收集24例脊椎侵袭性血管瘤患者,病变位于颈椎6例、胸椎14例、腰椎4例;观察其^(18)F-FDG PET/CT特点,比较具有不同CT表现病灶的最大标准摄取值(SUV_(max))。结果24例中,5例(5/... 详细信息

目的观察脊椎侵袭性血管瘤^(18)F-FDG PET/CT表现。方法回顾性收集24例脊椎侵袭性血管瘤患者,病变位于颈椎6例、胸椎14例、腰椎4例;观察其^(18)F-FDG PET/CT特点,比较具有不同CT表现病灶的最大标准摄取值(SUV_(max))。结果24例中,5例(5/24,20.83%)病变局限于椎体、19例(19/24,79.17%)病变累及椎体及附件;其中10例(10/24,41.67%)病变椎体见溶骨性破坏及内部残留骨质,6例(6/24,25.00%)伴单纯溶骨性破坏,4例(4/24,16.67%)伴骨小梁增粗、稀疏,4例(4/24,16.67%)骨质未见明显异常。相比邻近非病变椎体,12例(12/24,50.00%)病灶放射性摄取增高、9例(9/24,37.50%)接近、3例(3/24,12.50%)减低;14例(14/24,58.33%)放射性分布均匀、10例(10/24,41.67%)不均匀。24例血管瘤的SUV_(max)[2.50(1.53,4.13)]与肝脏SUV_(max)(2.79±0.53)差异无统计学意义(Z=0.261,P=0.794);其中,伴骨皮质破坏病灶的SUV_(max)高于无破坏病灶(P<0.05),伴骨折病灶的SUV_(max)高于无骨折病灶(P<0.05)。结论脊椎侵袭性血管瘤CT表现多样,其^(18)F-FDG代谢接近肝脏,合并骨皮质破坏及骨折病灶的代谢较高。

关键词：脊柱血管瘤氟脱氧葡萄糖F18 正电子发射断层显像和计算机体层摄影术

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

单目三维视觉测量技术研究进展

传感技术学报 2024年第3期37卷 365-380页

作者：宋乐路斯莹侯宇鹏天津大学精密测试技术及仪器国家重点实验室天津300072

单目三维视觉测量在视觉测量领域具有低成本、简便性、结构紧凑等优势,是以智能化、网络化制造为特征的先进制造典型技术之一。经过不断发展,单目三维视觉测量技术已成功应用于无人机导航、智能机器人、工业检测、医疗健康等领域,如今... 详细信息

单目三维视觉测量在视觉测量领域具有低成本、简便性、结构紧凑等优势,是以智能化、网络化制造为特征的先进制造典型技术之一。经过不断发展,单目三维视觉测量技术已成功应用于无人机导航、智能机器人、工业检测、医疗健康等领域,如今呈现出精准化、快捷化、微型化、自动化、动态化等发展趋势。以孔径数量为标准,将单目三维视觉测量技术分为单孔径及多孔径两大类,分别综述两类方法的研究现状和发展历程,重点论述了应用较广的运动恢复结构法(Structure From Motion,SFM)和光场三维测量方法,并对单目三维视觉测量技术的未来方向进行了展望。

关键词：单目视觉三维测量 SFM 光场综述

Nonlinear Multimodal Interference as Ultrafast Photonic Device for Dual-Wavelength Domain-Wall Dark Pulse Generation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics letters 2024年第7期41卷 47-52页

作者：王珊宋博乐窦鑫河乔飞鸿李响王锦波吕志国 School of Physical Science and Technology Key Laboratory of Semiconductor Photovoltaic Technology of Inner Mongolia Autonomous RegionInner Mongolia UniversityHohhot 010021China

In comparison to bright pulses, better stability that is not susceptible to loss makes dark pulses accessible for applications in such fields as signal processing, optics sensing, and quantum communication. Here we investigate the dual-wavelength domain-wall dark pulse generation in a graded-index multimode fiber(GIMF) based anomalous dispersion single-mode fiber(SMF) laser. By optimizing intra-cavity nonlinearity and pulse polarization, the mode-locked states can evolve each other between bright pulses, dark pulses, and bright-dark pulse pairs. The evolution mechanism among them may be relevant to the coherent mode superposition, spectral filtering, and mode selection in SMF-GIMF-SMF hybrid-fiber modulation devices that affect the pulse formation and evolution in temporal, frequency, and space domains. These results provide a valuable reference for promoting further development of nonlinear optics and ultrafast optics, in which ultrafast photonic devices, with low cost, simple manufacture as well as wide adaptability, as novel pulsed generation technique, play a vital role.

关键词： fiber polarization optics

骨髓坏死^(18)F-FDG PET/CT与MRI对照分析

在线全文

学校读者我要写书评

暂无评论

首都医科大学学报 2024年第1期45卷 36-41页

作者：宋乐李慧张卫方北京大学第三医院核医学科北京100191

目的探索骨髓坏死氟-18-脱氧葡萄糖(^(18)F-fluorodeoxyglucose,^(18)F-FDG)正电子发射断层显像/计算机断层显像(positron emission tomography/computed tomography,PET/CT)表现,提高对该病的认识。方法回顾性分析9例磁共振成像(magnetic resonance imaging,MRI)诊断为骨髓坏死患者的PET/CT及临床资料,对照MRI影像,总结病变分布,选择最大病变,分析^(18)F-FDG代谢特点及CT征象。结果患者男6例,女3例,中位年龄28.0岁,均患淋巴瘤。MRI检查髋部6例、胸腰椎2例、膝部1例。6例髂骨病变,内部均为T1加权像(T1-weighted image,T1WI)高信号,T2脂肪抑制像(T2-fat suppressed image,T2FSI)低信号,伴T1WI边缘环状低信号,其中5例内部代谢减低,边缘代谢增高伴骨质硬化;1例密度及代谢未见异常,MRI显示病变狭长。2例脊柱病变T1WI呈等、低信号,T2FSI高信号,其中1例为等代谢,密度稍高;1例代谢减低,密度未见异常。1例股骨病变T1WI高信号,T2FSI低信号,代谢及密度增高。8例PET/CT发现MRI检查范围之外更多病变。8例更早期的PET/CT发现部分病变呈低代谢、等密度。结论^(18)F-FDG代谢减低,后期可伴有边缘线状代谢及密度增高,是骨髓坏死的常见PET/CT影像特点。PET/CT有助于检出骨髓坏死,发现多骨病变。

关键词：骨髓坏死骨坏死氟-18-脱氧葡萄糖正电子发射断层显像/计算机断层扫描

高速涡轮牙钻法在阻生智齿拔除术中的应用研究

在线全文

学校读者我要写书评

暂无评论

临床和实验医学杂志 2024年第16期23卷 1779-1783页

作者：宋乐军卢阳淄博市中西医结合医院口腔科山东淄博255026 淄博市市级机关医院口腔科山东淄博255000

目的探究高速涡轮牙钻法在阻生智齿拔除术中的应用效果。方法前瞻性选择2022年1月至2023年12月淄博市中西医结合医院收治的行阻生智齿拔除术患者102例,按随机数表法将其分为两组,每组各51例。对照组给予传统拔牙法,研究组给予高速涡轮... 详细信息

目的探究高速涡轮牙钻法在阻生智齿拔除术中的应用效果。方法前瞻性选择2022年1月至2023年12月淄博市中西医结合医院收治的行阻生智齿拔除术患者102例,按随机数表法将其分为两组,每组各51例。对照组给予传统拔牙法,研究组给予高速涡轮牙钻法。观察两组的手术指标(手术时间、术中出血量、术后肿胀程度、术后张口受限度及拔牙完整性),比较两组手术前后的炎症指标[肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)、细胞间黏附分子1(ICAM-1)]、应激指标[丙二醛、超氧化物歧化酶(SOD)]、疼痛指标[降钙素基因相关肽(CGRP)、前列腺素E2(PGE2)]水平,并比较两组术后并发症发生情况。结果研究组患者的手术时间为(17.13±3.09)min,短于对照组[(24.07±4.81)min],术中出血量为(4.06±0.75)mL,少于对照组[(5.39±0.98)mL],术后肿胀程度评分、术后张口受限度及拔牙完整性评分分别为(1.81±0.39)分、(4.85±1.17)mm、(1.69±0.38)分,均低于对照组[(3.19±1.01)分、(7.62±2.05)mm、(3.28±1.03)分],差异均有统计学意义(P<0.05)。术后,两组TNF-α、IL-6、ICAM-1水平均较术前升高,但研究组TNF-α、IL-6、ICAM-1水平分别为(31.34±5.25)pg/mL、(26.35±3.71)pg/mL、(148.15±15.26)ng/mL,均低于对照组[(40.19±6.71)pg/mL、(37.02±4.58)pg/mL、(181.04±18.66)ng/mL],差异均有统计学意义(P<0.05)。术后,两组丙二醛水平均较术前升高,SOD水平均较术前降低,但研究组丙二醛水平为(11.47±2.82)mmol/L,低于对照组[(15.61±3.14)mmol/L],SOD水平为(59.13±3.98)U/mL,高于对照组[(43.85±3.06)U/mL],差异均有统计学意义(P<0.05)。术后,两组CGRP、PGE2水平均较术前升高,但研究组CGRP、PGE2水平分别为(2.29±0.47)ng/mL、(140.71±11.82)pg/mL,均低于对照组[(3.31±0.69)ng/mL、(205.29±18.15)pg/mL],差异均有统计学意义(P<0.05)。研究组术后并发症总发生率7.84%,比对照组的23.53%低,差异有统计学意义(P<0.05)。结论高速涡轮牙钻法在阻生智齿拔除术中的应用效果确切,可明显改善患者术后炎症应激反应,减轻疼痛,减少术后并发症发生。

关键词：阻生智齿高速涡轮牙钻肿瘤坏死因子α 丙二醛前列腺素E2

在线全文

学校读者我要写书评

暂无评论

深部煤系软岩大巷全断面锚注修复技术研究

中国矿业 2024年第7期33卷 149-159页

作者：何尚森刘瑞鹏丁鹏余宏宋乐中国煤炭工业协会咨询中心北京100013 宁夏王洼煤业有限公司宁夏固原756505

为解决深部煤系软岩大巷变形剧烈、持续时间长且支护困难的问题,以王洼煤矿8煤层南深部集中运输大巷为工程背景,采用现场勘查、矿物组分分析、围岩应力测试、数值模拟分析等方式,揭示了造成深部煤系软岩大巷产生强烈变形的主要原因,得... 详细信息

为解决深部煤系软岩大巷变形剧烈、持续时间长且支护困难的问题,以王洼煤矿8煤层南深部集中运输大巷为工程背景,采用现场勘查、矿物组分分析、围岩应力测试、数值模拟分析等方式,揭示了造成深部煤系软岩大巷产生强烈变形的主要原因,得出加强深部煤系软岩大巷支护的控制思路,并在此基础上根据煤系软岩的劣化程度和支护失效特征,提出了基于全断面高强锚索支护+喷浆+全断面注浆锚索锚注支护+钢棚支护的主被动联合补强修复支护方案,并建立了修复支护的“三个阶段、四个步骤”工艺体系。研究结果表明:8煤层南深部集中运输大巷围岩成分复杂、质地软弱、遇水易膨胀崩解,且处于高地应力环境,应力集中系数达到1.46,总体表现出变形速率快、持续时间长、变形量大的特点;原支护设计存在支护强度不足、未针对软岩特性采取有效措施的缺陷,导致顶板、巷帮部分锚杆锚索破断失效;进行全断面锚注修复支护后,形成高强度、范围大、连续性强的预应力场,预应力场有效影响深度增大至原支护的1.5倍。现场试验监测显示:补强修复支护后,大巷巷帮及顶底板变形趋于稳定,表明全断面锚注修复支护工艺对深部煤系软岩大巷的稳定性控制效果显著。

关键词：深部巷道软岩剧烈变形全断面支护锚索预应力场

银柴胡多糖超声辅助提取工艺优化及抗氧化活性分析

在线全文

学校读者我要写书评

暂无评论

食品工业科技 2024年第1期45卷 185-191页

作者：王红彭励宋乐冯璐李振凯李彦青高跳宁夏大学生命科学学院宁夏银川750021 宁夏天然药物工程技术研究中心宁夏银川750021

目的:为了提高银柴胡多糖得率,对银柴胡多糖提取工艺参数进行优化,并评价其体外抗氧化活性。方法:采用超声辅助提取银柴胡多糖,在单因素实验基础上结合响应面法(Box–Behnken Response Surface)对提取工艺参数进行优化,并采用Sevag法除... 详细信息

目的:为了提高银柴胡多糖得率,对银柴胡多糖提取工艺参数进行优化,并评价其体外抗氧化活性。方法:采用超声辅助提取银柴胡多糖,在单因素实验基础上结合响应面法(Box–Behnken Response Surface)对提取工艺参数进行优化,并采用Sevag法除蛋白得银柴胡粗多糖,进一步对其抗氧化活性进行分析。结果:优化后银柴胡多糖最佳提取工艺参数为超声温度50℃、时间3.20 h、提取次数2次,在此条件下多糖得率最高,为28.24%±0.10%,多糖含量为59.13%;体外抗氧化测定结果显示,银柴胡粗多糖清除DPPH自由基、OH自由基、ABTS+自由基的IC_(50)分别是5.47、2.40和1.44 mg/mL,表明其具有一定的抗氧化能力。结论:本研究经优化得到的银柴胡多糖提取工艺切实可行,可为银柴胡资源的开发利用提供理论依据。

关键词：银柴胡多糖提取 Box–Behnken响应面法抗氧化活性

Key Technology and Experimental Results of the Clean Air Heated Facility for Supersonic Combustion

同方期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2009年第5期22卷 760-765页

作者： ZHONG Zipeng song Wenyan le Jialing School of Power and Energy Northwestern Polytechnical University Xi ＇an 7100 72 China

The scramjet, which is the propulsion of hypersonic vehicle, has become the focus in many military developed countries. The ground tests play an important role in the research of scramjet. There is defect of test medium contamination （the thermochemical characteristic of the ground test medium is different from that of the flight medium） in existing ground test facilities for scramjet combustor experiment. To solve the problem of test medium contamination, the first clean air heated facility of China for scramjet combustor experiment is designed. The key technology of designing the clean air heated facility is summarized. By using bypass duct, combustor model is protected from high temperature. To reduce the switching time between main duct and bypass duct, solenoid valve and water-cooled system were used. Having centrosymmetric structure, the heat radiating area of the facility and heat loss of the facility are much lower than others. Clean air heated facility is adopted to conduct experiment, which is the first experiment of China in clean air inflow, research on hydrogen-fueled and ethylene-fueled ignition and combustion for scramjet combustor at different equivalence ratio. Successful ignition and sustained combustion of hydrogen has been achieved. Successful ethylene ignition and sustained main stream combustion is achieved with normal fuel injection and taking hydrogen as pilot flame. Experiment result shows that the wall pressure of combustor model rises when the equivalence ratio of hydrogen rises. As the wall pressure of combustor model rises, the pressure disturbance influences the shock train in the upstream.

关键词： scramjet clean air resistance heater combustion experiment

Nanosheet-structured B4C with high hardness up to 42 GPa

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第6期28卷 313-316页

作者： Chang-Chun Wang le-le song College of Science Jilin Institute of Chemical TechnologyJilin 132022China Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China

High-quality bulk boron carbide(B4C) is successfully prepared at high pressure and high temperature(HPHT) by using B4C powder as a precursor. The as-synthesized B4C possesses a nanosheet structure with a thickness value of 15 nm and a length of several dozen micrometers. Its Vickers hardness value and fracture toughness value are 42.4 GPa and4.51 MPa·m1/2, respectively, which are superior to those of B4 C obtained from spark plasma sintering due to its high densification and nanosheet structure. Additionally, it shows good property of oxidation resistance. In air, its oxidation resistance temperature is 1100?C which is higher than that of diamond under the same test condition.

关键词： boron carbide hardness fracture toughness oxidation resistance