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南昌市厚田沙地末次冰期风沙沉积的磁化率特征及其环境意义

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地质论评 2024年第4期70卷 1366-1376页

作者：钟颖李志文陈琼黄小兰胡海平孙丽杨妙文东华理工大学地球科学学院南昌330013 佛山科学技术学院环境与化学工程学院广东佛山528225 山东大学文化遗产研究院山东青岛266237

鄱阳湖滨周围和赣江下游沿岸广泛分布着一系列风成砂山。为了探讨南方风沙沉积的磁化率特征及其环境意义,本研究对鄱阳湖南部之厚田剖面的古风沙沉积进行了光释光测年、磁化率、粒度和重矿物分析。结果表明:(1)沙丘砂层的磁化率整体较低... 详细信息

鄱阳湖滨周围和赣江下游沿岸广泛分布着一系列风成砂山。为了探讨南方风沙沉积的磁化率特征及其环境意义,本研究对鄱阳湖南部之厚田剖面的古风沙沉积进行了光释光测年、磁化率、粒度和重矿物分析。结果表明:(1)沙丘砂层的磁化率整体较低,平均粒径(Mz)较粗,成熟度指数(ZTR)较低而风化指数(HW)较高,说明风化程度较低,形成于冬季风强盛、干燥寒冷的气候条件下;砂质古土壤层的磁化率较高,Mz较细,ZTR指数较高而HW指数较低,说明风化程度较高,形成于冬季风较弱、夏季风较强,温暖湿润的气候环境下。(2)厚田剖面第Ⅰ(77.0~57.1 ka)、Ⅲ(49.7~36.8 ka)、Ⅴ(29.7~14.9 ka)阶段依次对应深海氧同位素的MIS4、MIS3b、MIS2,指示为冷期,冬季风强盛,磁化率较低;第Ⅱ(57.1~49.7 ka)、Ⅳ(36.8~29.7 ka)阶段分别对应MIS3c和MIS3a,指示为暖期,夏季风强盛,磁化率较高。这些气候变化特征与黄土高原渭南剖面、深海氧同位素和中国亚热带洞穴石笋δ^(18)O记录具有良好的对比性。因此认为,磁化率在南方风沙沉积中可以有效揭示气候变化。

关键词：厚田沙地风沙沉积磁化率重矿物环境变化

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大悬挑檐异形钢支架施工方法应用实例

建筑技术 2024年第15期55卷 1801-1804页

作者：李增壮黄中营胡蓬勃北京市第三建筑工程有限公司北京100039

传统现浇屋面大悬挑梁、大悬挑板等构件支撑体系普遍采用悬挑工字钢、悬挑三脚架及落地式支撑脚手架等施工方法。四角异形钢支架体系与上述传统支撑架体系相比,在架体自重增加不大的前提下,不仅能提高架体整体刚度,保证模板的支撑精度,... 详细信息

传统现浇屋面大悬挑梁、大悬挑板等构件支撑体系普遍采用悬挑工字钢、悬挑三脚架及落地式支撑脚手架等施工方法。四角异形钢支架体系与上述传统支撑架体系相比,在架体自重增加不大的前提下,不仅能提高架体整体刚度,保证模板的支撑精度,且操作简单,安拆方便,更能进一步利用自身架体代替部分扣件(轮扣、盘扣)等周转材料,节约成本。本研究详细介绍了四角异形钢支架在现浇屋面大悬挑梁、大悬挑板悬挑支模过程中的设计、施工、监测,为类似超长悬挑现浇构件支撑体系的选择提供了新的施工方法。

关键词：大悬挑梁大悬挑板支撑体系四角异形钢支架

陈意教授“以和统之”理论治疗不寐临床经验探讨

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浙江中医药大学学报 2024年第9期48卷 1131-1135页

作者：徐山春钟滢章源陈意浙江中医药大学附属第一医院(浙江省中医院) 杭州310006 杭州市上城区凯旋街道卫生服务中心

[目的]总结陈意教授“以和统之”理论指导下治疗不寐的临证经验。[方法]通过师承学习、整理归纳相关文献及陈意教授的论述与案例,详细阐述对不寐病因病机的认识,探讨基于“以和统之”理论的独特辨治思路和经验,并举以医案验证。[结果]... 详细信息

[目的]总结陈意教授“以和统之”理论指导下治疗不寐的临证经验。[方法]通过师承学习、整理归纳相关文献及陈意教授的论述与案例,详细阐述对不寐病因病机的认识,探讨基于“以和统之”理论的独特辨治思路和经验,并举以医案验证。[结果]陈意教授认为不寐的发生是由于脏腑阴阳失衡、气血失和,提出以和法统摄八法,采取分而治之的策略,并强调养、疏、清、宁,形成了独特的安神助眠治疗特色。所附医案为值绝经前后的不寐患者,以阴阳失衡、阴不敛阳而致阴虚火旺为主病机,予滋阴降火、宁心安神治法,进一步调和气血,恢复脏腑功能,达到“阴平阳秘”的状态,“致中和”、人安寐。[结论]陈意教授以“以和统之”理论治疗不寐,疗效显著,值得学习与推广。

关键词：不寐以和统之治肝拟童阴平阳秘阴虚火旺宁心安神陈意名医经验

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子宫内膜容受性的研究进展

生殖医学杂志 2024年第9期33卷 1250-1257页

作者：钟晓盈贾雪敏刘海元中国医学科学院北京协和医学院北京协和医院妇产科国家妇产疾病临床医学研究中心北京100730

囊胚与子宫内膜的协同作用是建立成功妊娠的必要条件,容受性佳的子宫内膜及良好的胚胎质量是胚胎移植成功的两大关键因素。随着辅助生殖技术的发展,子宫内膜容受性(ER)逐渐受到重视,特别是对于反复种植失败的患者来说,准确辨别子宫内膜... 详细信息

囊胚与子宫内膜的协同作用是建立成功妊娠的必要条件,容受性佳的子宫内膜及良好的胚胎质量是胚胎移植成功的两大关键因素。随着辅助生殖技术的发展,子宫内膜容受性(ER)逐渐受到重视,特别是对于反复种植失败的患者来说,准确辨别子宫内膜容受时期可以协助评估种植窗,从而提高胚胎移植的成功率。子宫内膜相关疾病影响着众多不孕女性,尽管这类疾病与ER的相关性研究逐渐增多,但仍无国际公认的标准指导临床诊治,给不孕患者带来严重的心理及经济负担。本文从ER的临床应用出发,探讨ER的评估方法及不同子宫内膜相关疾病对ER的影响。

关键词：子宫内膜容受性胚胎移植子宫内膜相关疾病

基于生态维育理念的乡村游憩空间设计研究——以山东省青岛市青山渔村为例

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城市建筑 2024年第4期21卷 85-87页

作者：谭丁齐陶硕慧钟颖李滢梁国栋姜立婷大连大学建筑工程学院

在党对“三农”工作的全面领导背景下,以习近平新时代中国特色社会主义思想为指导,全面贯彻乡村振兴战略,构建利于“资源节约”的乡村产业体系。文章以山东省青岛市青山渔村为例,从生态维育视角出发,通过调查村落自然和人文现状,对处于... 详细信息

在党对“三农”工作的全面领导背景下,以习近平新时代中国特色社会主义思想为指导,全面贯彻乡村振兴战略,构建利于“资源节约”的乡村产业体系。文章以山东省青岛市青山渔村为例,从生态维育视角出发,通过调查村落自然和人文现状,对处于经济发展瓶颈期的旅游传统村落既有住居发展态势进行设计研究,提出利用被动式超低能耗建筑技术对乡村住居进行改造,减少污染、降低消耗,向改善生态的绿色化方向发展,并通过设计多功能生态主题乡村实践基地,为乡村振兴提供一条有一定可行性的发展路线。

关键词：乡村振兴生态维育传统村落绿色建筑

VIBRATION MEASUREMENT OF DOUBLE-ENDED TUNING FORKS RESONATOR

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Chinese Journal of Mechanical Engineering 2006年第1期19卷 128-130页

作者： LENG Changlin ZHANG Guoxiong zhong ying JIANG Chengzhi YU Fusheng State Key Laboratory of PrecisionMeasuring Technology and Instruments Tianjin University Tianjin 300072 China Department of Mechatronics Shandong Institute of Architecture and Engineering Jinan 250061 China

To enhance the coherence and reliability of the double-ended tuning fork （DETF） resonator, a measurement system of resonator vibration is presented to check its dynamic characteristics. Laser Doppler techniques are utilized and the relation between DETF vibration velocity and output current of photodetector is obtained. Resonator vibration equation is also analyzed and its driving power only depends on the direct current bias voltage and the amplitude of alternative voltage. Furthermore, a special resonator driving control circuit based on measurement is designed. The amplitude and frequency of circuit is controlled by a computer so that highly stable and strong driving signal can be output. Experiments on driving and measuring double-ended tuning fork have been done, The frequency of driving signal is 8 kHz and the peak-to-peak value of driving voltage is 140 V. Experimental results indicate resonator can be drived stably by driving control circuit and dynamic characteristics of DETF may be measured in real time.

关键词： Resonator Optical measurement Tuning fork MEMS Laser doppler

Degradation of benzophenone in aqueous solution by Mn-Fe-K modified ceramic honeycomb-catalyzed ozonation

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Journal of Environmental Sciences 2006年第6期18卷 1065-1072页

作者： HOU Yan-jun MA Jun SUN Zhi-zhong YU ying-hui ZHAO Lei School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

Comparative studies of ozonation alone, ceramic honeycomb-catalyzed and Mn-Fe-K modified ceramic honeycomb catalyzed ozonation processes have been undertaken with benzophenone as the model organic pollutant. The experimental results showed that the presence of Mn-Fe-K modified ceramic honeycombs significantly increased the removal rate of benzophenone and TOC compared with that achieved by ozonation alone or ceramic honeycomb-catalyzed ozonation. The electron paramagnetic resonance （EPR） experiments verified that higher benzophenone removal rate was attribute to more hydroxyl radicals generated in the Mn-Fe-K modified ceramic honeycomb-catalyzed ozonation. Under the conditions of this experiment, the degradation rate of all the three ozonation processes are increasing with the amount of catalyst, temperature and value of pH increased in the solution. We also investigated the effects of different process of ozone addition, the optimum conditions for preparing catalyst and influence of the Mn-Fe-K modified ceramic honeycomb after multiple-repeated use.

关键词： catalytic ozonation Mn-Fe-K modified ceramic honeycomb benzophenone

Effect of cooling rate on the phase transformation and stability of the mushy zone during the solidification of Waspaloy

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International Journal of Minerals,Metallurgy and Materials 2010年第4期17卷 464-469页

作者： Ling Wang Yi-jun Yao Bin Liu Bo-ying zhong Jian-xin Dong College of Mathematics and Physics Nanjing University of Information Science and Technology Nanjing 210044 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Scanning electron microscopy（SEM） and energy dispersive X-ray analysis（EDAX） were used to study the microstructure,microsegregation, and fluid flow tendency of the superalloy Waspaloy in the mushy zone,which had been solidified at different cooling rates. The investigation was accompanied with the calculation of Rayleigh *** is found that Ti is the main segregating element and the content of Ti is the highest in the final liquid at the cooling rates of 3-6℃/*** eta phase（η） precipitate presented in the residual liquid at the cooling rates higher than 6℃/min is responsible for the fluctuations in the curves of Ti *** dendrite arm spacing is found to markedly decrease with the increase of cooling *** maximum relative Rayleigh number occurs at 10-20℃below the liquidus temperature at a cooling rate of 1℃/min,where the mushy zone is most unstable and fluid flow is most prone to occur.

关键词： Waspaloy cooling rate solidification segregation stability mushy zone

Scalable high performance de-duplication backup via hash join

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第5期11卷 315-327页

作者： Tian-ming YANG Dan FENG zhong-ying NIU Ya-ping WAN Wuhan National Laboratory for Optoelectronics School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

Apart from high space efficiency,other demanding requirements for enterprise de-duplication backup are high performance,high scalability,and availability for large-scale distributed *** main challenge is reducing the significant disk input/output(I/O) overhead as a result of constantly accessing the disk to identify duplicate *** inline de-duplication approaches mainly rely on duplicate locality to avoid disk bottleneck,thus suffering from degradation under poor duplicate locality *** paper presents Chunkfarm,a post-processing de-duplication backup system designed to improve capacity,throughput,and scalability for *** performs de-duplication backup using the hash join algorithm,which turns the notoriously random and small disk I/Os of fingerprint lookups and updates into large sequential disk I/Os,hence achieving high write throughput not influenced by workload *** importantly,by decentralizing fingerprint lookup and update,Chunkfarm supports a cluster of servers to perform de-duplication backup in parallel;it hence is conducive to distributed implementation and thus applicable to large-scale and distributed storage systems.

关键词： Backup system De-duplication Post-processing Fingerprint lookup Scalability