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经皮脊柱内镜腰椎间盘摘除术后手术部位感染的临床特点及防治策略

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中国微创外科杂志 2024年第5期24卷 343-349页

作者：陈荣彬潘艺之陈文创鲁尧张劲新吴钊钿李勇广东省中医院珠海医院骨三科珠海519015 广州中医药大学第二临床医学院广州510405

目的总结经皮脊柱内镜腰椎间盘摘除(percutaneous endoscopic lumbar discectomy,PELD)术后手术部位感染(surgical site infection,SSI)的诊治经验。方法回顾性分析2016年1月~2022年12月11例PELD术后SSI的病例资料。PELD术后均出现剧烈腰背部或下肢疼痛,视觉模拟评分(Visual Analogue Scale,VAS)7~9分,平均8.1分。红细胞沉降率(ESR)17~114 mm/h,平均54.4 mm/h,C反应蛋白(CRP)8~151 mg/L,平均56.5 mg/L。MRI均提示术区椎间隙炎症信号改变。PELD术后2~17 d(平均9.5 d)确诊SSI。均采用抗生素治疗(经验性抗生素治疗4例,敏感抗生素7例),其中8例联合手术,包括经皮内镜病灶清除、置管冲洗引流4例,后路病灶清除2例,后路病灶清除联合内固定2例。结果随访14~75个月(平均36.8月)。根据改良MacNab标准,优5例,良4例,可2例。结论PELD术后SSI以发病急、再发剧烈腰背部或下肢疼痛、炎性指标升高及特征性影像学表现为临床特点,规范化的抗生素治疗辅以手术可以取得良好疗效。

关键词：经皮内镜腰椎间盘髓核摘除术腰椎间盘突出症手术部位感染临床特点防治策略

陕西高职院校科技成果转化提升路径探索——以陕西交通职业技术学院为例

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陕西交通科教研究 2024年第1期 40-42,55页

作者：黄荣宾徐欣杨熠奕陕西交通职业技术学院科技信息处陕西西安710018

以陕西交通职业技术学院为例,基于调查研究,分析了陕西高职院校科技成果转化现状,并从体制机制改革、科研平台建设、人才培养与团队建设等方面给出了陕西高职院校科技成果转化提升路径。

关键词：高职院校科技成果转化调研分析提升路径

平原河网水动力优化调度与水环境改善的响应关系研究

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水力发电学报 2024年第8期43卷 98-111页

作者：王添侯精明栾广学申腾飞张荣斌沈健孙学良西安理工大学省部共建西北旱区生态水利国家重点实验室西安710048 中规院(北京)规划设计有限公司北京100044

平原河网河道流动性较差是引起水环境污染严重的主要原因,引调水是改善平原河网地区水环境的重要措施之一。本文以佛山市三山围为例,基于实测资料构建了河网水动力水质耦合模型,采用15天的连续水动力水质监测数据对模型进行了验证,并将... 详细信息

平原河网河道流动性较差是引起水环境污染严重的主要原因,引调水是改善平原河网地区水环境的重要措施之一。本文以佛山市三山围为例,基于实测资料构建了河网水动力水质耦合模型,采用15天的连续水动力水质监测数据对模型进行了验证,并将NSE和RMSE模型评价指标用于模型评价。同时结合地势、潮汐规律和景观水位等设计了4种闸控模式和7种景观控制水位,共28种模拟工况,模拟分析了不同条件下的水动力水质改善与内外江潮位变化、引排水流量及其空间分布、闸控方式和景观水位等综合响应机理。结果表明:构建的模型合理可靠。研究区域受引排水路径的影响,河道流动性差异较为显著。综合考虑河道流量分布、水流路径、分汊河道分流作用和外江污染物浓度等对河道水质的作用效果并有效结合潮汐河网的动态水环境容量和污染源排放的时空分布对水环境的改善作用将非常显著。与低景观控制水位相比,高景观控制水位的内江动态水环境容量相对较大,污染物浓度较低。景观控制水位从0.2 m上升至0.8 m时,不同引调水路径的引水流量上升28.00%~64.70%,断面氨氮浓度削减了0.85~5.50 mg/L,削减比例达到28.89%~67.23%。本研究为平原潮汐河网水环境优化调度研究提供了新的思路,为相关部门对平原河网的水环境改善提供了重要的参考。

关键词：暴雨洪水管理模型一维河网模型引调水方案景观控制水位水动力水质耦合

Biogeography-based multi-objective optimization algorithm with hybrid migration and applying in ethylene cracking process

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Biogeography-based multi-objective optimization algorithm wi...

A theoretical insight about co-pyrolysis reaction of natural gas and coal

第36届中国控制会议

作者： Zheming Huang rongbin Qi East China University of Science and Technology Key Laboratory of Advanced Control and Optimization for Chemical ProcessMinistry of Education

ISBN: (纸本)9781538629185

The Ethylene cracking is highly nonlinear, complex process with many constraints because of the complex running state of cracking furnace groups. For the solutions to multi-objective problems of yield, cost and benefits, this paper puts forward a biogeography-based multi-objective optimization algorithm with hybrid migration（BBMOHM）. The hybrid migration strategy combines the self-adaptive migration with the simplex operator and the replication migration, which strengthens the convergence and the search ability, to avoid falling into local optimum. For the goal of utilizing the dominance information between individuals, this algorithm adopts the migration model of dominance degree to assist migration strategies improving the performance of the algorithm. Finally, experiments about the ZDT test function and the multi-objective optimization problem of the ethylene cracking process is verified the BBMOHM achieves good performance on convergence and distribution.

关键词： biogeography-based optimization multi-objective self-adaptive migration ethylene cracking optimization

来源： cnki会议评论

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Chinese Journal of Chemical Engineering 2023年第11期63卷 220-225页

作者： Mingjun Pan Chengkai Jin Bingying Han Runping Ye rongbin Zhang Gang Feng School of Future Technology School of Chemistry and Chemical EngineeringInstitute of Applied ChemistryNanchang UniversityNanchang 330031China School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China

The co-pyrolysis of natural gas and coal is a promising way for the production of acetylene due to its high efficiency for energy and hydrogen *** work investigated the thermodynamics for the copyrolysis reaction of natural gas and coal using density functional *** favorable reaction conditions are presented in the form of phase *** calculation results show that the extra amount of methane may benefit the production of acetylene in the co-pyrolysis reaction,and the C/H ratio of 1:1,temperature around 3000 K and pressure at 0.1 MPa are most *** results would provide basic data for related industrial process for the production of acetylene.

关键词： Natural gas Thermodynamics Hydrocarbons Co-pyrolysis Gibbs free energy Density functional theory

THz Channel Modeling: Consolidating the Road to THz Communications

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China Communications 2021年第5期18卷 33-49页

作者： Shanyun Liu Xianbin Yu rongbin Guo Yajie Tang Zhifeng Zhao Zhejiang Laboratory Hangzhou 311121China

For the sake of meeting the demand of data rates at terabit(Tbit)per second scale in future networks,the terahertz(THz)band is widely accepted as one of the potential key enabling technologies for next generation wireless communication *** the progressive development of THz devices,regrading THz communications at system level is increasing crucial and captured the interest of plenty of *** this scope,THz channel modeling serves as an indispensable and fundamental *** surveying the latest literature findings,this paper reviews the problem of channel modeling in the THz band,with an emphasis on molecular absorption loss,misalignment fading and multipath fading,which are major influence factors in the THz channel ***,we focus on simulators and experiments in the THz band,after which we give a brief introduction on applications of THz channel models with respects to capacity,security,and sensing as ***,we discuss some key issues in the future THz channel modeling.

关键词： terahertz(THz) channel modeling survey sixth-generation(6G) molecular absorption loss misalignment fading multipath fading

梁北矿松软大采高工作面高水充填沿空留巷技术研究

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煤炭技术 2024年第8期43卷 120-124页

作者：王克强侯荣彬张凯河南神火煤电股份有限公司河南永城476600 中国矿业大学江苏徐州221110

以高水材料适应性研究为基础,通过分析梁北煤矿厚硬顶板大采高工作面沿空留巷围岩控制难点,提出“预裂切顶-高水充填-超前加固”沿空留巷技术。通过室内试验确定了高水充填材料最佳水灰比、早强剂掺量和用水温度;采用理论分析和工程类... 详细信息

以高水材料适应性研究为基础,通过分析梁北煤矿厚硬顶板大采高工作面沿空留巷围岩控制难点,提出“预裂切顶-高水充填-超前加固”沿空留巷技术。通过室内试验确定了高水充填材料最佳水灰比、早强剂掺量和用水温度;采用理论分析和工程类比确定了预裂切顶、超前加固和高水充填支护方案;采用数值模拟分析了沿空留巷方案的可行性。工程实践效果表明,围岩变形滞后工作面100~150 m趋于稳定,变形整体可控,留巷效果较好。

关键词：大采高厚硬顶板高水材料沿空留巷

Mesoplasticity Approach to Studies of the Cutting Mechanism in Ultra-precision Machining

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Chinese Journal of Mechanical Engineering 2014年第2期27卷 219-228页

作者： LEE WB rongbin WANG Hao TO Suet CHEUNG Chi Fai CHAN Chang Yuen Partner State Key Laboratory of Ultra-precision Machining Technology The Hong Kong Polytechnic University

There have been various theoretical attempts by researchers worldwide to link up different scales of plasticity studies from the nano-, micro- and macro-scale of observation, based on molecular dynamics, crystal plasticity and continuum mechanics. Very few attempts, however, have been reported in ultra-precision machining studies. A mesoplasticity approach advocated by Lee and Yang is adopted by the authors and is successfully applied to studies of the micro-cutting mechanisms in ultra-precision machining. Traditionally, the shear angle in metal cutting, as well as the cutting force variation, can only be determined from cutting tests. In the pioneering work of the authors, the use of mesoplasticity theory enables prediction of the fluctuation of the shear angle and micro-cutting force, shear band formation, chip morphology in diamond turning and size effect in nano-indentation. These findings are verified by experiments. The mesoplasticity formulation opens up a new direction of studies to enable how the plastic behaviour of materials and their constitutive representations in deformation processing, such as machining can be predicted, assessed and deduced from the basic properties of the materials measurable at the microscale.

关键词： ultra-precision machining cutting mechanism mesoplasticity shear angle prediction size effect,micro-cutting force variation high frequency tool-tip vibration

Ni/CeO_(2)基催化剂构筑及其CO_(2)甲烷化催化性能研究进展

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低碳化学与化工 2024年第8期49卷 74-88页

作者：胡译之彭揚张义焕张荣斌冯刚叶闰平南昌大学化学化工学院江西南昌330031

CO_(2)加氢制甲烷(即“CO_(2)甲烷化”)是实现碳中和目标的重要途径。CeO_(2)由于具有丰富的表面氧空位和优异的储氧性能被认为是重要的催化剂载体之一,过渡金属Ni也因为具有优异的催化性能和低廉的价格被广泛应用于催化剂的研究,CeO_(2... 详细信息

CO_(2)加氢制甲烷(即“CO_(2)甲烷化”)是实现碳中和目标的重要途径。CeO_(2)由于具有丰富的表面氧空位和优异的储氧性能被认为是重要的催化剂载体之一,过渡金属Ni也因为具有优异的催化性能和低廉的价格被广泛应用于催化剂的研究,CeO_(2)和金属Ni结合形成的Ni/CeO_(2)基催化剂在CO_(2)甲烷化反应中展现了良好的应用前景。阐述了Ni/CeO_(2)基催化剂催化CO_(2)甲烷化的机理,介绍了Ni/CeO_(2)基催化剂制备方法,重点总结了活性中心特征、载体性质、助剂类型和金属-载体相互作用等影响Ni/CeO_(2)基催化CO_(2)甲烷化催化性能的因素,并总结了改性Ni/CeO_(2)基催化剂的催化性能。分析发现,通过对Ni/CeO_(2)基催化剂进行改性,可以调控Ni/CeO_(2)基催化剂的CO_(2)甲烷化催化性能与产物选择性,可为提升其CO_(2)甲烷化催化性能提供新的思路。

关键词： Ni/CeO_(2)基催化剂 CO_(2)甲烷化金属-载体相互作用制备方法