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分批次清创联合负压封闭引流治疗创伤弧菌感染致坏死性筋膜炎2例报告

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中国烧伤创疡杂志 2024年第4期36卷 268-271页

作者：邹贤典陈梓锋王永胜王波郑秋宝广州市番禺区中心医院创伤骨科广东广州511400

给予2021年10月及11月广州市番禺区中心医院收治的2例创伤弧菌感染致坏死性筋膜炎患者在头孢哌酮钠舒巴坦钠+左氧氟沙星抗感染治疗的基础上,局部创面行分批次清创联合负压封闭引流治疗,分别于治疗13 d及10 d后,创面坏死组织明显减少,肉... 详细信息

给予2021年10月及11月广州市番禺区中心医院收治的2例创伤弧菌感染致坏死性筋膜炎患者在头孢哌酮钠舒巴坦钠+左氧氟沙星抗感染治疗的基础上,局部创面行分批次清创联合负压封闭引流治疗,分别于治疗13 d及10 d后,创面坏死组织明显减少,肉芽组织生长良好,继而行减张缝合术封闭创面。

关键词：创伤弧菌坏死性筋膜炎清创负压封闭引流减张缝合

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提升PCB钻孔叠层的方法研究

印制电路资讯 2024年第3期 90-92页

作者：程嵩岐易子豐郭志达王利萍广东喜珍电路科技有限公司广东肇庆526000 肇庆学院广东肇庆526061

随着新能源技术的快速发展,PCB在新能源行业的使用越来越广泛。钻孔效率已然成为PCB生产工艺关注的焦点,其主要是受总孔数与钻孔一次性可钻的片数因素影响。本文主要从提升钻孔总PNL数从而达到钻孔效率的提升的目的,具体从加长刃钻针、... 详细信息

随着新能源技术的快速发展,PCB在新能源行业的使用越来越广泛。钻孔效率已然成为PCB生产工艺关注的焦点,其主要是受总孔数与钻孔一次性可钻的片数因素影响。本文主要从提升钻孔总PNL数从而达到钻孔效率的提升的目的,具体从加长刃钻针、参数优化、孔径优化三个方面综合改进,从而提高了钻孔生产效率。

关键词： PCB 钻孔叠层钻针

高速铁路平面基础控制网复测数据处理及精度分析

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天津建设科技 2024年第4期34卷 9-13页

作者：王冰琰贾斌斌吕子丰吴晓华中铁十五局集团第五工程有限公司天津300133

平面精密控制网工程已成为高速铁路建设的一个重要组成部分,其精度对后续施工起决定性作用。以某新建高速铁路平面基础控制网复测为例,介绍了复测方案,对外业数据采集、内业数据处理的要求和方法进行实例分析,对平差成果使用坐标较差、... 详细信息

平面精密控制网工程已成为高速铁路建设的一个重要组成部分,其精度对后续施工起决定性作用。以某新建高速铁路平面基础控制网复测为例,介绍了复测方案,对外业数据采集、内业数据处理的要求和方法进行实例分析,对平差成果使用坐标较差、坐标较差相对精度指标进行观测精度评定,测量成果各项指标满足规范相关规定。

关键词：高速铁路平面基础控制网复测精度分析

Coats病光学相干断层扫描成像特征及其与黄斑纤维化的相关性

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中华实验眼科杂志 2024年第5期42卷 436-441页

作者：周子义窦国睿严宏祥张国恒朱锦亭孙董洁张自峰李曼红王雨生空军军医大学西京医院眼科全军眼科研究所西安710032

目的分析Coats病患者光学相干断层扫描(OCT)成像特征及其在黄斑纤维化预测中的价值。方法采用巢式病例对照研究方法,收集2008年1月至2021年10月于空军军医大学西京医院经彩色眼底照相、眼部B型超声、荧光素眼底血管造影及频域OCT检查确... 详细信息

目的分析Coats病患者光学相干断层扫描(OCT)成像特征及其在黄斑纤维化预测中的价值。方法采用巢式病例对照研究方法,收集2008年1月至2021年10月于空军军医大学西京医院经彩色眼底照相、眼部B型超声、荧光素眼底血管造影及频域OCT检查确诊的Coats病患者43例43眼。其中,男40例,女3例;年龄2~60岁,中位年龄13岁。以黄斑纤维化为不良预后指标,根据随访结束时是否出现黄斑纤维化将患者分为2个组,比较各组间OCT特征的差异,并采用Logistic回归分析这一不良预后指标发生的危险因素。结果43例Coats病患者的OCT临床特征包括视网膜内硬性渗出43眼(占100%)、视网膜下液21眼(占48.8%)、黄斑囊肿17眼(占27.9%)、视网膜下渗出9眼(占20.9%)、视网膜前高反射点7眼(占16.3%)、视网膜前膜21眼(占48.8%)以及视网膜内液22眼(占51.2%)。彩色眼底照相可见硬性渗出分布于后极部38眼(占93.0%)以及中周部27眼(占65.9%);OCT检查可见硬性渗出分布于内核层35眼(占81.4%)以及外核层33眼(占76.7%)。OCT检出渗出性视网膜脱离的21眼中,彩色眼底照相检出9眼(占42.9%),眼部B型超声检出18眼(占85.7%)。黄斑纤维化组视网膜下液以及视网膜下渗出眼数比例均高于无黄斑纤维化组,差异均有统计学意义(χ^(2)=20.755,P<0.001;χ^(2)=6.133,P=0.013)。Logistic回归分析结果显示,出现视网膜下液是发生黄斑纤维化的危险因素(比值比=48.345,95%置信区间:4.272~547.066,P=0.002)。结论OCT检查能够直观检测到Coats病患者的视网膜下液、视网膜下渗出、黄斑囊肿、黄斑渗出及视网膜高反射点等特征,其中视网膜下液是发生黄斑纤维化的危险因素。

关键词： Coats病光学相干断层扫描视网膜下液视网膜渗出黄斑纤维化炎症反应不良预后

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Single-atom Zn for boosting supercapacitor performance

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Nano Research 2022年第3期15卷 1715-1724页

作者： Zongge Li Danni wang Huifang Li Mang Ma Ying Zhang zifeng Yan Stefano Agnoli Guoxin Zhang Xiaoming Sun State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China Al-ion Battery Research Center Department of Electrical Engineering and AutomationShandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China Department of Chemical Sciences University of PadovaVia Marzolo 1Padova I-35131Italy College of Electromechanical Engineering Shandong Engineering Laboratory for Preparation and Application of High-performance CarbonMaterialsQingdao University of Science&TechnologyQingdao 266061China

Single-atom metal-incorporated carbon nanomaterials(CMs)have shown great potential towards broad catalytic *** this work,we show that N-doped porous CMs embedded with redox-able Zn atoms exhibit superior capacitive *** Zn(~2.72 at.%)/N(~12.51 at.%)doping were realized by incorporating Zn2+and benzamide into the condensation and carbonization of formamide and subsequent annealing at 900℃.The Zn and N species are mutually benefited during the formation of ZnN4 *** as-obtained Zn1NC material affords a very large capacitance of 621 F·g^(−1)(at 0.1 A·g^(−1)),superior rate capability(~65%retention at 100 A·g^(−1)),and excellent cycling stability(0.00044%per cycle at 10 A·g^(−1)).These merits are attributed to the high Zn/N loading,atomic Zn-boosted pseudocapacitive behavior,large specific surface area(~1,085 m^(2)·g^(−1)),and rich pore hierarchy,thus ensuring both large pseudo-capacitance(e.g.,~37.9%at 10 mV·s^(−1))and double-layer *** of establishing a new type of high Zn/N-loading carbon materials,our work uncovers the capacitive roles of atomically dispersed metals in CMs.

关键词： atomic dispersion zinc doping nitrogen doping carbon nanomaterial supercapacitor

A novel Co(phen)_2/C catalyst for the oxygen electrode in rechargeable lithium air batteries

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Chinese Science Bulletin 2012年第16期57卷 1959-1963页

作者： wang Hong LIAO XiaoZhen JIANG QiZhong YANG XiaoWei HE YuShi Ma zifeng Institute of Electrochemical and Energy Technology Department of Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

A novel Co(phen)2/C catalyst was prepared by coating cobalt(II) phenanthroline (phen) chelate on BP2000 carbon black and then heat treating in an inert atmosphere. The obtained Co(phen)2/C product with 1.0 wt% cobalt loading exhibits similar morphology and porosity characteristics to those of the bare BP2000. X-ray diffraction measurements demonstrate a face-centered cubic (fcc) α-Co phase embedded in the carbon support after pyrolysis. Charge/discharge tests of the lithium-oxygen cells using the prepared Co(phen)2/C catalyst show high discharge capacities of 4870 mAh g-1 (0.05 mA cm-2 ), 3353 mAh g-1 (0.1 mA cm-2 ) and 3220 mAh g 1 (0.15 mA cm-2 ), respectively. The Co(phen) 2 /C cathode exhibits reasonable reversibility with capacity retention of 1401 mAh g-1 ( 0.1 mA cm-2 ) after 10 cycles. The superior electrochemical performance of the prepared Co(phen)2/C catalyst and low cost of the phenanthroline chelating agent indicate that Co(phen)2/C is a promising cheap catalyst for lithium-air batteries.

关键词：催化剂制备 phen 空气电池氧电极可充电合作锂邻菲罗啉

Adult tiger beetles Cicindela gemmata modify their foraging strategy in different hunting contexts

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Insect Science 2023年第6期30卷 1749-1758页

作者： Shumin wang Panshuai Fei zifeng Wu Zeyi Luo Yichen Wu Ningning Sun Yujie wang Shumei Zi Lifang Gao Bo Du School of Life Sciences Lanzhou UniversityLanzhouChina College of Ecology Lanzhou UniversityLanzhouChina

Predator–prey interaction has long been an interesting item in the research of animal *** that live prey can damage their predators,predators must trade foraging efficiency for safety while hunting,but the extent of this trade-off is not yet *** beetles display diversity in their diets and hunting strategies,and hence,they become an ideal system to address how self-security affects foraging *** addressed this question in captive adult tiger beetles Cicindela *** offering several types of arthropod and plant foods,we confirmed that *** is *** found that *** hunt by either ambushing or chasing their prey,and that they switch between strategies based on differences in the number of prey,the prey status and encounter rate,and the number of *** success increased with the number of prey but decreased with prey encounter *** success decreased as prey body size and encounter rate *** Cicindela gemmata often gave up an attack when it was *** active giving up of hunting may be a consequence of a trade-off between foraging efficiency and ***,it is an adaptive response to the risk of injury when hunting for larger live prey.

关键词： ambush chase foraging strategy hunting success self-security

Application of New Heavy Metals Resistant Porous Binder Material Used in Fluid Catalytic Cracking Reaction

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China Petroleum Processing & Petrochemical Technology 2014年第1期16卷 35-39页

作者： Zhang Zhongdong Liu Zhaoyong Yan zifeng Gao Xionghou Zhang Haitao wang Zhifeng State Key Laboratory of Heavy Oil Processing China University of Petroleum Lanzhou Petrochemical Research Center Petrochemical Research Institute PetroChina

A novel porous binder was obtained from acid-treated kaolin. This new binder possessed abundant meso/macropores, good hydrothermal stability and heavy metal resistance. The prepared catalyst using new binder featured low attrition index and large pore volume. The catalysts were contaminated with Ni, V, and tested in a fixed-fluidized bed reactor unit. In comparison with the reference sample, the oil conversion achieved by the above-mentioned catalyst increased by 3.50 percentage points, and heavy oil yield decreased by 2.86 percentage points, while the total liquid yield and light oil yield increased by 2.82 percentage points and 0.79 percentage points, respectively. The perfect pore structure, good hydrothermal stability and heavy metal resistant performance of new binder were the possible causes leading to its outstanding performance.

关键词： fluid catalytic cracking binder conversion porous material hydrothermal stability heavy metal resistant

开放性眼外伤患者行Ⅱ期玻璃体切除手术的时机选择

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国际眼科杂志 2024年第4期24卷 630-633页

作者：马春霞杨霞霞田超伟李曼红胡丹王雨生张自峰空军军医大学西京医院眼科全军眼科研究所陕西省西安市710032

目的:观察开放性眼外伤不同时间点行玻璃体切除手术的临床疗效,以探讨Ⅱ期玻璃体手术的时机选择。方法:回顾性系列病例研究。纳入2022-06/2023-02就诊于我院眼科的开放性眼外伤患者60例60眼,按Ⅰ期规范化急诊救治手术时间与Ⅱ期玻璃体... 详细信息

目的:观察开放性眼外伤不同时间点行玻璃体切除手术的临床疗效,以探讨Ⅱ期玻璃体手术的时机选择。方法:回顾性系列病例研究。纳入2022-06/2023-02就诊于我院眼科的开放性眼外伤患者60例60眼,按Ⅰ期规范化急诊救治手术时间与Ⅱ期玻璃体视网膜手术的不同间隔时间分为治疗组A(间隔时间≤14 d, 32例32眼)和治疗组B(间隔时间>14 d, 28例28眼)。治疗组A中眼球破裂伤16眼(50%),穿通伤13眼(41%),贯通伤3眼(9%);治疗组B中眼球破裂伤15眼(54%),穿通伤12眼(43%),贯通伤1眼(4%)。术后随访6 mo,对比观察两组患者的治疗效果。结果:玻璃体切除手术前两组患者间视力无差异(P>0.05)。术后6 mo,治疗组A中10眼(31%)视力显著提高,21眼(66%)视力有效提高,1眼(3%)视力无改善;治疗组B中,5眼(18%)视力显著提高,16眼(57%)视力有效提高,7眼(25%)视力无变化,两组比较有差异(U=322.5,P=0.032)。治疗组A中继发性青光眼、硅油依赖、玻璃体再积血、眼球萎缩与治疗组B比较无显著差异(均P>0.05);治疗组A术后随访未见外伤性增生性玻璃体视网膜病变(TPVR),显著低于治疗组B(P<0.05)。结论:开放性眼外伤Ⅱ期玻璃体视网膜手术在Ⅰ期救治手术后2 wk内完成预后相对较好。

关键词：眼外伤开放性 Ⅱ期手术玻璃体切除术