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精细化管理在建筑工程施工中的应用研究

价值工程 2024年第26期43卷 36-39页

作者：刘生福敦煌市建设工程质量安全服务站酒泉736200

随着科技的快速发展和管理理念的更新,各行业的管理模式正在发生深刻变革。建筑业,作为经济的重要支柱,亟需对其管理模式进行创新。在激烈的市场竞争中,施工企业若沿袭传统管理方式,将难以提升效率和实现经济效益。因此,施工企业需思考... 详细信息

随着科技的快速发展和管理理念的更新,各行业的管理模式正在发生深刻变革。建筑业,作为经济的重要支柱,亟需对其管理模式进行创新。在激烈的市场竞争中,施工企业若沿袭传统管理方式,将难以提升效率和实现经济效益。因此,施工企业需思考在有限资源下,如何通过管理创新来优化资源配置并最大化其价值。在此背景下,建筑工程的精细化管理显得尤为重要,它不仅能完善管理体系、革新传统模式,还能减少资源浪费、提高施工可控性,进而提升企业经济与社会效益,增强企业竞争力,推动企业稳健发展。

关键词：精细化管理建筑施工管理施工可控度经济效益社会效益

偶氮四唑胍盐GZT高压物性的第一性原理计算

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原子与分子物理学报 2024年第1期41卷 99-107页

作者：杜艺华刘其军李星翰刘福生刘正堂西南交通大学物理科学与技术学院成都610031 西北工业大学材料学院西安710072

偶氮四唑胍盐GZT具有良好的爆轰性能和较低的感度,是潜在的高能钝感炸药和气体发生剂.目前针对GZT的研究主要集中在常温常压状态下,而对其在高压等极端条件下的研究极少开展,其压力下的结构稳定性、电子性质以及氢键相互作用还有待深入... 详细信息

偶氮四唑胍盐GZT具有良好的爆轰性能和较低的感度,是潜在的高能钝感炸药和气体发生剂.目前针对GZT的研究主要集中在常温常压状态下,而对其在高压等极端条件下的研究极少开展,其压力下的结构稳定性、电子性质以及氢键相互作用还有待深入分析.本文采用基于密度泛函理论的第一性原理计算方法研究了GZT在0~50 GPa压力下的结构稳定性、电子结构以及氢键相互作用.研究结果表明,GZT在此压力范围内没有发生结构转变,其结构在x轴方向上氢键分布稀少的特点导致了它沿此方向容易被压缩,C1-N1是结构中表现得最不稳定的化学键.同时,GZT属于间接带隙化合物,带隙随着压力的增加而单调递减,感度增加.此外,N-H…N类型的氢键在GZT所有的相互作用中占据主导地位氢键沿yz平面的贡献占主要地位,沿x轴贡献很少.压力使得氢键相互作用的范围扩大且距离缩短.

关键词：偶氮四唑胍盐(GZT) 第一性原理压力电子结构氢键

偶氮四唑叠氮基甲脒AFZT高压物性的第一性原理计算

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原子与分子物理学报 2024年第3期41卷 113-122页

作者：杜艺华刘其军甘云丹李星翰刘福生刘正堂西南交通大学物理科学与技术学院键带工程组成都610031 西安近代化学研究所西安710065 西北工业大学材料学院西安710072

偶氮四唑叠氮基甲脒AFZT的爆轰性能表现优异,在高能炸药领域中具有广阔的应用前景.本文采用基于密度泛函理论的第一性原理方法计算了AFZT在0~50 GPa压力下的晶体结构、电子性质以及氢键相互作用,并分析了这些性质在压力下的变化规律.在... 详细信息

偶氮四唑叠氮基甲脒AFZT的爆轰性能表现优异,在高能炸药领域中具有广阔的应用前景.本文采用基于密度泛函理论的第一性原理方法计算了AFZT在0~50 GPa压力下的晶体结构、电子性质以及氢键相互作用,并分析了这些性质在压力下的变化规律.在压力的作用下,AFZT晶体在5 GPa下发生了结构转变并伴随着电子结构中带隙值的突变,其带隙先减小后增大再减小,总态密度的峰值随着压力的增加而减小.结构中叠氮甲脒阳离子上的N8-N9与N9-N10键在压力下表现得最稳定,N-H…N类型的氢键在所有相互作用中占据主导地位.此外,AFZT结构沿不同晶轴压缩的难易程度与此方向上氢键相互作用分布的疏密有关,并且其氢键主要沿xz平面分布而在y轴上分布极少,这导致了它沿y轴方向最易被压缩.

关键词： AFZT 第一性原理含能材料高压

Phase and Defect Engineering of GeTe-based Alloys for High Thermoelectric Performance

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Chinese Journal of Structural Chemistry 2020年第5期39卷 821-830页

作者： ZHANG Chao-Hua WANG Yi-Bo LI Jun-Qin liu fu-sheng College of Materials Science and Engineering Shenzhen Key Laboratory of Special Functional MaterialsShenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsInstitute of Deep Underground Sciences and Green EnergyShenzhen UniversityShenzhen 518060China

The widespread applications of thermoelectric(TE)materials in power generation and solid-state cooling require improving their TE figure of merit(ZT)***,GeTe-based alloys have shown great promise as mid-temperature TE materials with superhigh TE performance,mostly due to their relatively high-degeneracy band structures and low lattice thermal *** this perspective,we review the most recent progress of the GeTe-based TE alloys from the view of phase and defect *** two strategies are the most widely-used and efficient approaches in GeTe-based alloys to optimize the transport properties of electrons and phonons for high *** phase transition from rhombohedral to cubic structure is believed to improve the band convergence of GeTe-based alloys for higher electrical *** defects in GeTe-based alloys include the point defects from Ge vacancies and substitutional dopants,linear and planar defects from Ge *** defect engineering of GeTe-based alloys is important not only for optimizing the carrier density but also for tuning the band structure and phonon-scattering *** summarized strategies in this review can also be used as a reference for guiding the further development of GeTe-based alloys and also other TE materials.

关键词： GeTe thermoelectric phase defect Ge vacancies

第一性原理研究取代基对含能材料撞击感度的影响

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原子与分子物理学报 2025年第3期42卷 130-140页

作者：黎红艳卢妹包恃缘刘福生刘正堂白志鑫刘其军西南交通大学物理科学与技术学院西北工业大学凝固技术国家重点实验室

取代基的种类和位置会影响含能材料的分子结构和化学键强度，从而对其撞击感度产生影响.本文基于第一性原理计算方法分析了氨基基团和甲基基团对三硝基苯类含能材料撞击感度的影响.根据计算得到的弹性常数，通过Voigt-Reuss-Hill平均法... 详细信息

取代基的种类和位置会影响含能材料的分子结构和化学键强度，从而对其撞击感度产生影响.本文基于第一性原理计算方法分析了氨基基团和甲基基团对三硝基苯类含能材料撞击感度的影响.根据计算得到的弹性常数，通过Voigt-Reuss-Hill平均法计算得到了几种含能材料的体积模量B、剪切模量G、杨氏模量E和泊松比v.接着，尝试通过分析氨基和甲基取代基的种类和数量对力学参数、能带结构、态密度等性质的影响.在一定程度下，氨基个数与撞击感度之间呈负相关，与禁带宽度呈正相关，可以通过比较带隙值来判断一组含氨基的多硝基芳烃材料的撞击感度大小关系.相较于氨基，甲基数量与力学性能的相关性较氨基取代基更好，甲基数量变化对材料的总态密度能量影响更大；甲基数量与材料的撞击感度之间没有相关性但与禁带宽度呈负相关，无法通过带隙值的大小来确定一组含甲基的硝基芳烃类含能材料的撞击感度大小关系.

关键词：含能材料撞击感度取代基力学性质电子性质

Hugoniot equation of state of olivine and its geodynamic implications

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Science China Earth Sciences 2016年第3期59卷 619-625页

作者： HUANG Xiao Ge YUAN Xian Hao CHEN Zu An liu fu sheng BAI Wu Ming Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Institute of High Temperature and High Pressure Physics Key Laboratory of Advanced Technologies of Materials Ministry of Education of China Southwest Jiaotong University

Large olivine samples were hot-pressed synthesized for shock wave experiments. The shock wave experiments were carried out at pressure range between 11 and 42 GPa. Shock data on olivine sample yielded a linear relationship between shock wave velocity D and particle velocity u described by D=3.56(?0.13)+2.57(?0.12)u. The shock temperature is determined by an energy relationship which is approximately 790°C at pressure 28 GPa. Due to low temperature and short experimental duration, we suggest that no phase change occurred in our sample below 30 GPa and olivine persisted well beyond its equilibrium boundary in metastable phase. The densities of metastable olivine are in agreement with the results of static compression. At the depth shallower than 410 km, the densities of metastable olivine are higher than those of the PREM model, facilitating cold slab to sink into the mantle transition zone. However, in entire mantle transition zone, the shock densities are lower than those of the PREM model, hampering cold slab to flow across the "660 km" phase boundary.

关键词： Hugonite density Shock temperature Olivine Mantle transition zone

VEGFA、HIF-1α在老年肺癌组织表达及对肺癌细胞血管管腔形成的影响

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中国老年学杂志 2024年第6期44卷 1489-1493页

作者：王清武香梅刘福升宫理达陈震陆爱萍北京老年医院病理科北京100095 北京肿瘤医院病理科

目的探究血管内皮生因子(VEGF)A、缺氧诱导因子(HIF)-1α在老年肺癌组织中表达及对肺癌细胞血管管腔形成的影响。方法选取进行根治手术的100例肺癌患者所切除的肺部病理组织作为研究标本,使用免疫组织化学染色法检测VEGFA、HIF-1α阳... 详细信息

目的探究血管内皮生因子(VEGF)A、缺氧诱导因子(HIF)-1α在老年肺癌组织中表达及对肺癌细胞血管管腔形成的影响。方法选取进行根治手术的100例肺癌患者所切除的肺部病理组织作为研究标本,使用免疫组织化学染色法检测VEGFA、HIF-1α阳性表达,并分析VEGFA、HIF-1α与患者淋巴转移关系。将培养和转染后的肺癌细胞分为SPC-A-1细胞组、Axitinib组、YC-1组、Axitinib+YC-1组,使用基质胶小管形成实验检测血管生成,Western印迹检测VEGF、微血管密度(MVD)蛋白,PCR检测肺癌细胞中HIF-1α、VEGFA mRNA表达。结果与肺癌组织比较,癌旁组织中VEGFA、HIF-1α阳性表达明显较高(P<0.05)。发生淋巴结转移中,肺癌组织中的HIF-1α阳性率为60.23%、VEGFA阳性率为70.89%;未发生淋巴结转移中,肺癌组织中的HIF-1α阳性率为39.76%、VEGFA阳性率为29.11%,差异具有统计学意义(P<0.05)。与SPC-A-1细胞组比较,Axitinib组与YC-1组管腔形成数量、VEGF、MVD、VEGFA、HIF-1α mRNA表达均明显降低(P<0.05);与Axitinib组、YC-1组比较,Axitinib+YC-1组上述指标均明显降低(P<0.05)。结论 VEGFA、HIF-1α在老年肺癌组织中的表达较癌旁组织明显上调,并与肺癌细胞血管管腔形成密切相关,VEGFA、HIF-1α可作为评估肺癌患者的重要指标。

关键词：肺癌血管管腔血管内皮生长因子A 缺氧诱导因子1α

Stable hydrogen-bonded organic frameworks and their photo-and electro-responses

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Nano Research 2024年第8期17卷 7675-7699页

作者： Ying Hou Xin-Song Huang sheng-Hao Gong Chen liu Yangyang liu Tian-fu liu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry and Biochemistry California State UniversityLos AngelesCalifornia 90032USA College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Hydrogen-bonded organic frameworks(HOFs)are a recent class of porous materials that have garnered considerable research interest owing to their distinctive *** can be constructed through judicious selection of H-bonding motifs,which are further enforced by other weak intermolecular interactions such asπ–πstacking,van der Waals forces,and framework *** advantage of these interactions,we can expand the functional field of HOFs by introducing active ***,researchers have made substantial advancements in using HOFs for chemical sensing,catalysis,proton conduction,biological applications,and *** low bonding energy of H-bonds allows for precise control over the concentration of ligands in solvents,forming diverse HOF *** varied structures offer significant advantages for producing HOFs with photo-responsive and electro-responsive ***,the presence of H-bonds in HOFs results in their inherent lower stability compared to metal-organic frameworks(MOFs)and covalent-organic frameworks(COFs)formed via coordination and covalent bonds,*** a result,the pursuit of stable and innovative HOF materials with novel functional sites remains an ongoing *** review provides an overview of recent research progress in the development of new strategies for stable HOF synthesis and applications of HOFs with stimuli-responsive *** first classified all synthetic methods reported to date and discussed the stable HOFs synthesized,as well as their unique properties and *** addition,we summarized the applications of HOFs utilizing their synergistic responses to external stimuli,including photo,electrical,pressure,and chemical *** systematically reviewed stable HOF synthesis and applications,which may lead to a deeper understanding of the structure–activity relationship for these materials and guide future HOF design.

关键词： stable hydrogen-bonded organic frameworks(HOFs) photo-response electro-response photoelectric synergistic response

A continuous-wave Nd:YVO_(4)-KGW intracavity Raman laser with over 34% diode-to-Stokes optical efficiency

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High Power Laser Science and Engineering 2024年第2期12卷 62-68页

作者： Quan sheng Jingni Geng Tianchang liu Shijie fu Wei Shi Jianquan Yao Institute of Laser and Optoelectronics School of Precision Instrument and Optoelectronics EngineeringTianjin UniversityTianjinChina Key Laboratory of Optoelectronic Information Technology(Ministry of Education) Tianjin UniversityTianjinChina

We demonstrate a continuous-wave(CW)Nd:YVO_(4)-potassium gadolinium tungstate(KGW)intracavity Raman laser with a diode-to-Stokes optical efficiency of 34.2%.By optimizing the cavity arrangement and reducing the cavity losses,8.47 W Stokes output at 1177 nm was obtained under an incident 878.6 nm diode pump power of 24.8 *** influence of cavity losses on the power and efficiency of the CW Raman laser,as well as the potential for further optimization,was investigated based on the numerical *** observation of thermally-induced output rollover was well explained by the calculation of the thermal lensing and cavity stability,indicating that the end-face curvature played an important role when the end-face of the crystal was highly reflective coated to make the cavity.A 10.9 W Stokes output under 40.9 W incident pump was also demonstrated with a cavity arrangement less sensitive to the end-face curvature,which is the highest output power of CW intracavity Raman lasers reported.

关键词： continuous wave intracavity Raman laser KGW crystal thermal lens