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配加细磨烧结粉矿对带式焙烧机球团质量的影响

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中国冶金 2024年第2期34卷 35-41,95页

作者：智谦张福明韩志国张卫华北京首钢国际工程技术有限公司北京100043 北京市冶金三维仿真设计工程研究中心北京100043 首钢集团有限公司北京100041

为充分发挥带式焙烧机原料适应性强的优势,同时降低球团生产成本,将粗颗粒的烧结粉矿经闭路磨矿工艺处理至一定粒度和水分后,与磁铁精矿配合使用作为球团生产原料,通过工业试验考察其对带式焙烧机球团生产线生球和成品球的影响。试验结... 详细信息

为充分发挥带式焙烧机原料适应性强的优势,同时降低球团生产成本,将粗颗粒的烧结粉矿经闭路磨矿工艺处理至一定粒度和水分后,与磁铁精矿配合使用作为球团生产原料,通过工业试验考察其对带式焙烧机球团生产线生球和成品球的影响。试验结果表明,在麦克粉比例小于30%时,可保证细磨矿粒度小于0.074 mm(200目)以下的比例大于90%,滤饼水分小于9%,能满足球团生产原料要求。生球落下次数和抗压强度随细磨矿配比增加而提高,配加细磨矿可减少球团膨润土使用量,提高球团铁品位。配加细磨烧结粉会降低成品球的抗压强度,但对还原度和低温还原粉化率无明显影响。综合来看,巴西卡粉、托克粉、麦克粉按4∶3∶3的比例混磨后过滤,得到的细磨矿以40%的比例添加到球团原料中,为理想的配矿方案,有助于降低球团生产成本。

关键词：烧结粉矿磨矿带式焙烧机球团配矿

Diurnal Variation in Relative Photosynthetic Performance of Marestail (Hippuris vulgaris Linn.) Across a Water Temperature Gradient using PAM Fluorometry in Jiuzhaigou National Nature Reserve,Sichuan Province,China

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Journal of Mountain Science 2011年第6期8卷 794-807页

作者： GAO Linan TANG Ya Carla BOSSARD WANG Yan han zhiguo Department of Environment College of Architecture and Environment Sichuan University Chengdu 610065 China Department of Biology Saint Mary＇s College of California Moraga California 94575 USA Jiuzhaigou Administrative Bureau Zhangzha Town Jiuzhaigou County Siehuan 623400 China Zealquest Laboratory Zealquest Scientific Technology Co. Ltd. Shanghai 200333 China

This paper reports the first photosynthetic study of marestail in Jiuzhaigou. In this work, we used PAM fluorometry to examine photosynthetic rates of submerged and emerged marestail in three lakes. Three lakes were studied across a gradient of water temperature, with low water temperature conditions in Grass Lake and Arrow Bamboo Lake, and higher water temperature in Five Colored Lake. In the field, electron transport rates （ETRmax） were measured as rapid light curves （RLCs） by in situ yield measurements. Submerged and emerged marestail showed higher photosynthetic activity in Five Colored Lake compared to the other lakes, a response consistent with the adaptation of marestail in Five Colored Lake to high water temperature. The optimal temperature for photosynthesis of submerged marestail in Jiuzhaigou was about 12 ~C. Non- photochemical quenching （NPQ） of submerged and emerged marestail increased with increasing water temperature. Maximum quantum yield （Fv/Fm） of submerged marestail in Five Colored Lake showed full recovery at 170o h due to higher NPQ. Further, the chlorophyll a for submerged marestail was the highestin Grass Lake and the lowest in Five Colored Lake. These results indicate that in different lakes the function of these aquatic plants is associated with a diversity of place-dependent environmental conditions, especially water temperature that leads to pronounced differences in the plant＇s ecophysiological reactions.

关键词： Water Temperature Photosynthetic Chlorophyll Marestail

带式焙烧机配建200万吨磨矿生产线设计特点

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矿业工程 2024年第4期22卷 49-52,57页

作者：智谦韩志国张卫华北京首钢国际工程技术有限公司烧结球团事业部北京100043 北京市冶金三维仿真设计工程研究中心北京100043

介绍了某200万吨/a带式焙烧机球团磨矿生产线的设计特点。通过对原矿特性和球团生产需求的研究,确定采用先进的两段湿式闭路磨矿生产工艺,最终产品为粒度-200目以下≥95%,水分≤9%的赤铁精矿。设计过程中,集成应用了多项先进设备,如溢... 详细信息

介绍了某200万吨/a带式焙烧机球团磨矿生产线的设计特点。通过对原矿特性和球团生产需求的研究,确定采用先进的两段湿式闭路磨矿生产工艺,最终产品为粒度-200目以下≥95%,水分≤9%的赤铁精矿。设计过程中,集成应用了多项先进设备,如溢流型球磨机、立磨机、高效浓密机、快开板框压滤机等,并充分考虑了节能环保因素,生产能耗低,噪音污染小,无生产污水和固体废弃物外排。本工程的建成为带式焙烧机生产的原料供应提供了新的思路。

关键词：带式焙烧机磨矿工艺设计节能环保

A reconstruction method of AFM tip by using 2 μm lattice sample

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Optoelectronics Letters 2022年第7期18卷 440-443页

作者： ZhanG Xiaodong ZHAO Lin han zhiguo XU Xiaoqing LI Suoyin WU Aihua Hebei Semiconductor Research Institute Shjiazhuang 050051China

As an ultra-precise instrument to characterize nano-morphology and structure,the morphology of atomic force microscopy(AFM)tip directly affects the quality of the scanned images,which in turn affects the measurement *** order to accurately characterize three-dimensional information of AFM tip,a reconstruction method of AFM tip using 2μm lattice sample is *** normal circumstances,an array of micro-nano structures is used to reconstruct the morphology of AFM ***,the 2μm lattice sample was developed based on semiconductor technology as a characterization tool for tip *** experimental results show that the 2μm lattice sample has good uniformity and consistency,and can be applied to the tip reconstruction *** addition,the reconstruction method can accurately obtain the morphology of AFM tip,effectively eliminate the influence of the"probe effect"on the measurement results,and improve measurement accuracy.

关键词： lattice method eliminate

An Open-Source System for In Planta Gene Stacking by Bxbl and Cre Recombinases

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Molecular Plant 2014年第12期7卷 1756-1765页

作者： Lili Hou Yuan-Yeu Yau Junjie Wei zhiguo han Zhicheng Dong David W. Ow Plant Gene Engineering Center South China Agricultural Plant Molecular Analysis and Genetic Improvement Key Laboratory SouthChina Botanical Garden Chinese Academy of Sciences 723 Xingke Road Guangzhou 510650 China University of Chinese Academy of Sciences 19 Yuquan Road Beijing 100049 China Former Affiliation Plant Gene Expression Center USDA-ARS & Plant & Microbial Biology University of California-Berkeley 800Buchanan St. Albany CA 94710 USA

The rapid development of crops with multiple transgenic traits arouses the need for an efficient system for creating stacked cultivars. Most major crops rely on classical breeding to introgress the transgene from a laboratory variety to the numerous cultivars adapted to different growing regions. Even with vegetative propagated crops, genetic crosses are conducted during varietal improvement prior to vegetative cloning. The probability to assort the ＇x＇ number of transgenic loci into a single genome may seem trivial, （~）x for a diploid species, but given the ＇y＇ number of other nontransgenic traits that breeders also need to assemble into the same genome, the （~）~＊y probability for a ＇breeding stack＇ could quickly make the line conversion process unmanageable. Adding new transgenes onto existing transgenic varieties without creating a new segregating locus would require site-specific integration of new DNA at the existing transgenic locus. Here, we tested a recombinase-mediated gene-stacking scheme in tobacco. Sequential site-specific inte- gration was mediated by the mycobacteriophage Bxbl integrase-catalyzed recombination between attP and attB sites. Transgenic DNA no longer needed after integration was excised by Cre recombinase-mediated recombination of Iox sites. Site-specific integration occurred in -10% of the integration events, with half of those events usable as substrates for a next round of gene stacking. Among the site-specific integrants, however, a third experienced gene silencing. Overall, precise structure and reproducible expression of the sequentially added triple traits were obtained at an overall rate of -3% of the transformed clones--a workable frequency for the development of commercial cultivars. Moreover, since nei- ther the Bxbl-att nor the Cre-lox system is under patent, there is freedom to operate,

关键词： transgenesis site-specific recombination integrase gene targeting transgene expression.

A flow cytometer based protocol for quantitative analysis of bloom-forming cyanobacteria(Microcystis) in lake sediments

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Journal of Environmental Sciences 2012年第9期24卷 1709-1716页

作者： Quan Zhou Wei Chen Huiyong Zhang Liang Peng Liming Liu zhiguo han Neng Wan Lin Li Lirong Song State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Zealquest Laboratory for Ecological Research Zealquest Scientific Technology Co. Ltd. Shanghai 200333 China Changshu Institute of Technology Changshu 215500 China

A quantitative protocol for the rapid analysis of Microcystis cells and colonies in lake sediment was developed using a modified flow cytometer, the CytoSense. For cell enumeration, diluted sediment samples containing Microcystis were processed with sonication to disintegrate colonies into single cells. An optimized procedure suggested that 5 mg dw （dry weight）/mL dilution combined with 200 W x 2 min sonication yielded the highest counting efficiency. Under the optimized determination conditions, the quantification limit of this protocol was 3.3x104 cells/g dw. For colony analysis, Microcystis were isolated from the sediment by filtration. Colony lengths measured by flow cytometry were similar to those measured by microscopy for the size range of one single cell to almost 400 ~tm in length. Moreover, the relationship between colony size and cell number was determined for three Microcystis species, including Microcystisflos-aquae, M. aeruginosa and M. wessenbergii. Regression formulas were used to calculate the cell numbers in different- sized colonies. The developed protocol was applied to field sediment samples from Lake Taihu. The results indicated the potential and applicability of flow cytometry as a tool for the rapid analysis of benthic Microcystis. This study provided a new capability for the high frequency monitoring of benthic overwintering and population dynamics of this bloom-forming cyanobacterium.

关键词： flow cytometry benthic Microcystis cell enumeration colony size measurement

EPS外墙外保温系统聚氨酯粘结胶加固后受力性能试验研究

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新型建筑材料 2024年第8期51卷 18-24,37页

作者：李安起郑义张国强韩志国李靖山东建筑大学山东济南250101 山东建筑大学工程鉴定加固研究院有限公司山东济南250013

通过EPS保温板抗拉试验、疲劳试验、加固疲劳试验,研究粘贴率、粘贴方式对EPS板及聚氨酯粘结胶加固试样的抗拉承载力和疲劳性能影响。结果表明:除满粘外,在相同条件下,EPS板抗拉承载力平均值由大到小为:条粘>点粘>十字粘>点框粘;EPS板... 详细信息

通过EPS保温板抗拉试验、疲劳试验、加固疲劳试验,研究粘贴率、粘贴方式对EPS板及聚氨酯粘结胶加固试样的抗拉承载力和疲劳性能影响。结果表明:除满粘外,在相同条件下,EPS板抗拉承载力平均值由大到小为:条粘>点粘>十字粘>点框粘;EPS板疲劳次数与粘贴率呈正相关,条粘法疲劳性能最好;采用聚氨酯粘结胶加固后的试样抗拉承载力平均值均符合要求,且达到满粘抗拉承载力的90%;初始疲劳对加固效果的影响最大仅7%,加固后点粘、条粘、十字粘、点框粘的疲劳次数分别达到满粘的87%、89%、87%、75%;聚氨酯粘结胶加固后累计疲劳次数更多,EPS板整体使用寿命得到延长,加固方法较为可靠。

关键词： EPS保温板抗拉承载力疲劳试验受力性能聚氨酯粘结胶加固

A regular column on the latest thinking of Chinese philosophers and social scientists Symposium on Restructuring China’s Economy:A Summary

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Social Sciences in China 1985年第3期 9-22页

作者： han zhiguo Xie Zhenqing

is a summary of the symposium held jointly by the China Association for the Study ofEconomic Restructuring and the China Association for the Study of Socialist *** was the first national symposium on the theoretical problems facingChina’s reform of its economic structure after the Third Plenum of the Twelfth Cen-tral Committee,CPC,in October *** participants discussed a series of prob-lems of interest,such as the theoretical basis for reform,a planned commodity econ-omy,the question of enterprise vitality,the separation of ownership from manage-ment,the new planning management system,price reform, distribution according towork and wage reform and the division of responsibility between government and enterprises.

关键词： A regular column on the latest thinking of Chinese philosophers and social scientists Symposium on Restructuring China’s Economy

Trust in ESG reporting: The intelligent Veri-Green solution for incentivized verification

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BLOCKCHAIN-RESEARCH AND APPLICATIONS 2024年第2期5卷 126-139页

作者： Liu, Liyuan Ma, zhiguo Zhou, Yiyun Fan, Melissa han, Meng St Josephs Univ 5600 City Ave Philadelphia PA 19131 USA Zhejiang Univ 866 Yuhangtang Rd Hangzhou 310027 Zhejiang Peoples R China Natl Board Med Examiners 3750 Market St Philadelphia PA 19104 USA

In today's corporate environment, Environmental, Social, and Governance (ESG) reports crucially reflect an organization's commitment to sustainability, environmental preservation, and social responsibility. As corporations share these detailed reports, the responsibility to validate and assure adherence to respected ESG benchmarks critically lies with third -party assurance organizations. However, the essential verification process often encounters challenges related to authenticity, credibility, and fairness, underscoring the need for a new solution. The selection of verifiers is a crucial aspect of this process, as their expertise and impartiality directly impact the validity and trustworthiness of the verification. Consequently, "Veri-Green," an innovative blockchain-based incentive mechanism, has been introduced to improve the ESG data verification process. Considering potential risks in verification systems, such as reputational damage due to oversight or inadvertent approval of inaccurate data, and data security risks involving the management of sensitive organizational information, the verifier selection process needs to be thoroughly considered and designed. Through the utilization of advanced machine learning algorithms, potential verification candidates are precisely identified, followed by the deployment of the Vickrey Clarke Groves (VCG) auction mechanism. This approach ensures the strategic selection of verifiers and cultivates an ecosystem marked by truthfulness, rationality, and computational efficiency throughout the ESG data verification process. In this framework, verifiers are not only encouraged but also properly incentivized, developing a more transparent and equitable verification process, thereby driving the ESG agenda towards future defined by genuine, impactful corporate responsibility and sustainability.

关键词： Incentive mechanism ESG Artificial intelligence Truthfulness BLOCKCHAIN