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浅埋煤层开采覆岩“梯形”破断参数与裂隙演化分析

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河南理工大学学报（自然科学版） 2024年第3期43卷 50-59页

作者：王朋李瑞程志恒孔德中陈昊熠张宏图贵州大学矿业学院贵州贵阳550025 陕西省神木市能源局陕西神木719300 中国矿业大学(北京)能源与矿业学院北京100083 华北科技学院矿山安全学院河北燕郊101601 煤炭开采水资源保护与利用国家重点实验室北京102209 北京科技大学土木与资源工程学院北京100083 河南理工大学安全科学与工程学院河南焦作454000

目的为了探究浅埋煤层开采覆岩“梯形”破断参数与裂隙演化规律间的关联机制,并量化表征覆岩垮落、裂隙分布特征,方法以崖窑峁煤矿为研究对象,采用理论分析、物理相似模拟、数值模拟、现场实测相结合的方法,分析覆岩垮落空间分布形态,... 详细信息

目的为了探究浅埋煤层开采覆岩“梯形”破断参数与裂隙演化规律间的关联机制,并量化表征覆岩垮落、裂隙分布特征,方法以崖窑峁煤矿为研究对象,采用理论分析、物理相似模拟、数值模拟、现场实测相结合的方法,分析覆岩垮落空间分布形态,并量化表征上覆岩层垮落“梯形”的分布参数。结果结果表明:上覆岩层受煤层开采扰动影响,沿两侧破断线整体呈“梯形”形态,由于破断角φ,γ不同,故覆岩采动裂隙在空间上呈非对称“斜四边形”裂隙发育体的展布形态,结论基于理论计算得出崖窑峁矿业30204工作面覆岩垮落分布形态,覆岩垮落两侧破断角开切巷处破断角φ∈[58.7°,68.7°],采煤机机头处破断角γ∈[60.8°,67.8°],并根据破断角公式进一步计算,得出开切巷处覆岩垮落长度Lφj=11.5 m;采煤机机头处覆岩垮落长度Lγj=10.4 m。依据现场30204工作面3-1煤层顶板垮落实际监测数据,得出上覆岩层垮落的最佳高度为11~30 m,裂隙发育最佳宽度在距离工作面开切巷5 m和采煤机机头5 m范围内。

关键词：浅埋煤层破断参数覆岩垮落数值模拟相似模拟现场实测

塞来昔布联合甲钴胺治疗腰椎间盘突出症的效果

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中国药物滥用防治杂志 2024年第7期30卷 1295-1298页

作者：齐德重吴海洋黄辉商丘市中心医院骨科河南商丘476000

目的:分析塞来昔布联合甲钴胺对腰椎间盘突出症患者镇痛及腰椎功能影响。方法:选取2022年4月—2024年1月我院收治的82例腰椎间盘突出患者为研究对象。以随机数字表法分为观察组与对照组,各41例,对照组采用甲钴胺治疗,观察组采用甲钴胺+... 详细信息

目的:分析塞来昔布联合甲钴胺对腰椎间盘突出症患者镇痛及腰椎功能影响。方法:选取2022年4月—2024年1月我院收治的82例腰椎间盘突出患者为研究对象。以随机数字表法分为观察组与对照组,各41例,对照组采用甲钴胺治疗,观察组采用甲钴胺+塞来昔布治疗。对比两组临床疗效、腰椎功能、血清炎性因子、疼痛程度。结果:观察组临床有效率为91.84%,高于对照组的73.47%(P<0.05);观察组治疗后、随访时JOA评分高于对照组,ODI评分低于对照组(P<0.05);观察组治疗后PRI、VAS及PPI评分低于对照组(P<0.05);观察组治疗后TNF-α、IL-6及IL-1水平低于对照组(P<0.05)。结论:对于腰椎间盘突出症患者,甲钴胺联合应用塞来昔布治疗可有效改善患者腰椎功能,并降低疼痛程度及血清炎症因子水平,有利于其恢复。

关键词：塞来昔布甲钴胺腰椎间盘突出症镇痛腰椎功能

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海上油田电液联控单管分层注聚技术研究

石油机械 2024年第3期52卷 73-78页

作者：钱钦车传睿任从坤张雪梅李德忠石琼中国石化胜利油田分公司石油工程技术研究院

针对传统单管细分注聚技术存在因聚合物吸附等造成测调仪投捞不到位、配聚器调配困难及有效期短等问题,研发了一种电液联控单管分层注聚技术。该技术包含电液复合分控装置、液控多级配聚器、非接触式热传导流量计等核心工具。电液复合... 详细信息

针对传统单管细分注聚技术存在因聚合物吸附等造成测调仪投捞不到位、配聚器调配困难及有效期短等问题,研发了一种电液联控单管分层注聚技术。该技术包含电液复合分控装置、液控多级配聚器、非接触式热传导流量计等核心工具。电液复合分控装置通过1根主控电缆,实现1根液控管路分控多个液控工具,大大简化了井筒管线数量;液控多级配聚器解决了注聚过程中流量调节困难的问题,实现变排量调节和大压差注入;非接触式热传导流量计实现聚合物流量井下长效在线监测。目前该技术已成功应用3井次,分注层数2~3层,最大单层配注量130 m^(3)/d,测调次数达21次,测试准确率达85%以上,在井时间约600 d依然有效。该技术满足了海上油田“保黏、细分、长效”的注聚需求,具有较高的推广应用价值。

关键词：海上油田单管分层注聚电液联控实时监测

rTMS疗法在缺血性脑卒中康复治疗中的应用及对认知功能的影响

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中外医疗 2024年第18期43卷 66-68,72页

作者：郑得忠林玮佳李梦丹福建中医药大学附属康复医院/福建省康复技术重点实验室福建福州350003

目的研讨重复经颅磁刺激(Repeat Transcranial Magnetic Stimulation,rTMS)疗法在缺血性脑卒中(Ce-rebral Ischemic Stroke,CIS)康复治疗中的应用及对患者认知功能的影响。方法简单随机选取2021年3月—2023年10月福建中医药大学附属康... 详细信息

目的研讨重复经颅磁刺激(Repeat Transcranial Magnetic Stimulation,rTMS)疗法在缺血性脑卒中(Ce-rebral Ischemic Stroke,CIS)康复治疗中的应用及对患者认知功能的影响。方法简单随机选取2021年3月—2023年10月福建中医药大学附属康复医院收治的60例CIS患者为研究对象,根据随机数字表法分为两组,各30例,对照组予以常规康复治疗,观察组在对照组的基础上予以rTMS疗法干预,比较两组不同治疗阶段的认知功能、肢体活动功能以及自主生活能力。结果治疗后,观察组洛文斯顿认知功能评估量表(Lowen-stein Cognitive Function Assessment Scale,LOTCA)各评分项(定向、知觉、视运动组织以及思维运作)得分以及总分均高于对照组,差异有统计学意义(P均<0.05)。治疗后,观察组运动评分量表(Fugl-Meyer Assessment,FMA)中的上、下肢评分项得分均高于对照组,差异有统计学意义(P均<0.05)。治疗后,观察组改良巴氏指数(Modified Barthel index,MBI)得分为(71.28±6.82)分,高于对照组的(65.98±7.52)分,差异有统计学意义(t=2.859,P=0.005)。结论在CIS康复治疗中辅用rTMS疗法,能够更有效改善患者的认知功能以及肢体活动功能,促进其自主生活能力恢复。

关键词：缺血性脑卒中重复经颅磁刺激疗法认知功能肢体活动功能

ON THE PRIMARY η-PHASE IN A HIGH-Ti Ni-Fe-Cr BASED SUPERALLOY

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Acta Metallurgica Sinica(English Letters) 1992年第3期5卷 172-177页

作者： GUO Shouren LU dezhong Institute of Metal Research,Academia Sinica,Shenyang,China Inst of Metal Research Acad Sinica Shenyang China

The precipitation and dissolution together with their control of the primary η-phase in a high-Ti Ni-Fe-Cr base superalloy have been *** precipitation of primary η-phase was found to be closely related to Ti or Al content and solidification rate of the alloy. The aggregation of blocky η-phase may remarkably reduce the tensile strength,ductility and rupture life of the *** temperature-time relation of dissolution of the primary η-phase obeys T=1370-86.1 lgt for as-cast *** formation of primary η-phase may be prevented by the reasonable control of Ti or Al content and smelting *** adoption of treatment under large hot deformation and homogenization may be the remedy for unfavorable influence of η-phase.

关键词： superalloy primary η-phase Ti homogenization

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合成氨企业二氧化碳高值化利用探讨

氮肥技术 2024年第2期45卷 1-2,8页

作者：赵云莉王德忠张玉忠河南晋开化工投资控股集团有限责任公司河南开封475004

在“双碳”目标下二氧化碳气体高值化利用成为合成氨企业碳减排的有效途径。本文研究分析了合成氨企业二氧化碳高价值产品方案,建议合成氨企业要因地制宜选址二氧化碳产品方案,为合成氨企业碳减排提供参考。

关键词：双碳合成氨二氧化碳利用

Perovskite Light-Emitting Diodes

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CCS Chemistry 2020年第4期2卷 859-869页

作者： Chenyang Zhao dezhong Zhang Chuanjiang Qin State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

Perovskites show exciting potential for photoelectric applications,especially for light-emitting diodes(LEDs),owing to their intrinsically high photoluminescence efficiency and color *** efforts made over the last 5 years,the external quantum efficiency(EQE)of lead-halide perovskite-based LEDs has sharply increased beyond 20%,which is comparable to the performance of existing lighting ***,including defect passivation,the formation of low-dimensional quantum-well structure perovskites,and a combination of appropriate electron and hole transport materials in electroluminescent devices.

关键词： lead-halide perovskite defect passivation carrier balance outcoupling radiative recombination quantum-well structure stability perovskite light-emitting diodes

Asian summer monsoon precipitation recorded by stalagmite oxygen isotopic composition in the western Loess Plateau during AD1875―2003 and its linkage with ocean-atmosphere system

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Chinese Science Bulletin 2008年第13期53卷 2041-2049页

作者： LIU JingHua ZHANG PingZhong CHENG Hai CHEN FaHu YANG XunLin ZHANG dezhong zhou Jing JIA JiHong AN ChunLei SANG WenCui Kathleen R. JOHNSON Key Laboratory of Western China's Environmental System of Ministry of Education College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China Department of Geology and Geophysics University of Minnesota Minneapolis MN 55455 USA School of Geographical Sciences Southwest University Chongqing 400715 China Department of Earth System Science University of California Irvine CA 92697 USA

Based on 5 high-precision 230Th dates and 103 stable oxygen isotope ratios (δ18O) obtained from the top 16 mm of a stalagmite collected from Wanxiang Cave,Wudu,Gansu,variation of monsoonal precipita-tion in the modern Asian Monsoon (AM) marginal zone over the past 100 years was reconstructed. Comparison of the speleothem δ18O record with instrumental precipitation data at Wudu in the past 50 years indicates a high parallelism between the two curves,suggesting that the speleothem δ18O is a good proxy for the AM strength and associated precipitation,controlled by "amount effect" of the pre-cipitation. Variation of the monsoonal precipitation during the past 100 years can be divided into three stages,increasing from AD 1875 to 1900,then decreasing from AD 1901 to 1946,and increasing again thereafter. This variation is quite similar to that of the Drought/Flooding index archived from Chinese historical documents. This speleothem-derived AM record shows a close association with the Pacific Decadal Oscillation (PDO) between AD 1875 and 1977,with higher monsoonal precipitation corre-sponding to cold PDO phase and vice versa at decadal timescale. The monsoonal precipitation varia-tion is out of phase with the PDO after AD 1977,probably resulting from the decadal climate jump in the north Pacific occurring at around AD 1976/77. These results demonstrate a strong linkage between the AM and associated precipitation and the Pacific Ocean via ocean/atmosphere interaction. This rela-tionship will aid to forecast future hydrological cycle for the AM monsoon region,and to improve forecasting potential of climatic model with observation data from cave.

关键词：石笋同位素季风降水

The physicochemical properties of some imidazolium-based ionic liquids and their binary mixtures

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Science China Chemistry 2012年第8期55卷 1509-1518页

作者： NING Hui HOU MinQiang MEI QingQing LIU YuanHui YANG dezhong HAN BuXing Beijing National Laboratory for Molecular Sciences Key Laboratory of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

The density, viscosity and conductivity of ionic liquids （ILs）, 1-octyl-3-methylimidazolium tetrafluoroborate （[omim][BF4]）, 1-octyl-3-methylimidazolium chloride （[omim][C1]）, 1-hexyl-3-methylimidazolium tetrafluoroborate （[hmim] BF4]）, 1-hexyl- 3-methylimidazolium chloride （[hmim][C1]）, 1-hexyl-3-methylimidazolium hexafluorophosphate （[hmim][PF6]）, and the [omim][BF4] ＋ [omim][Cl], [hmim][BF4] ＋ [hmim][C1], and [hmim][PF6] ＋ [hmim][C1] binary mixtures were studied at dif- ferent temperatures. It was demonstrated that the densities of both the neat ILs and their mixtures varied linearly with temper- ature. The density sensitivity of a binary mixture is between those of the two components. The excess molar volumes （l/e） of [hmim][BF4] ＋ [hmim][C1] and [hmim][PF6] ＋ [hmim][C1] mixtures are positive in the whole composition range. For [omim][BF4] ＋ [omim][C1], the VE is also positive in the [omirn][C1]-rich region, but is negative in the [omim][BF4]-rich re- gion. The viscosity or conductivity of a mixture is in the intermediate of those of the two neat ILs. For all the neat ILs and the binary mixtures studied, the order of conductivity is opposite to that of the viscosity. The Vogel-Tammann-Fulcher （VTF） equations can be used to fit the viscosity and conductivity of all the neat ILs and the binary mixtures. The neat ILs and their mixtures obey the Fractional Walden Rule very well, and the values of the Walden slopes are all smaller than unit, indicating obvious ion associations in the neat ILs and the binary mixtures.

关键词： ionic liquids density viscosity conductivity Walden rule