疳积焦饼治疗小儿疳积108例疗效观察

疳积是儿科常见病、多发病之一.自1993年12月～1997年12月,采用家传疳积焦饼,治疗小儿疳积症108例,疗效显著,现介绍如下.1 一般资料108例中,男58例,女50例.年龄最小1岁,最大12岁(1～3岁51例,4～6岁37例,

中国平煤神马集团首山焦化公司7.63m超大型容积焦炉顶装改捣固一次试车成功

中国平煤神马集团首山焦化公司7．63m超大型容积顶装焦炉改捣固焦炉一次试车成功，于2013年10月12日正式投产。在全世界捣固焦炉系列中，该焦炉属于单孔产量最高（55t）、环保设施齐全、工艺技术比较先进的一流炉型。据统计，7．63m捣固焦炉投产后，不仅在入炉煤配比中增加了价格低廉的不粘结、弱黏煤以及贫瘦煤的使用量，还能使吨焦成本降低了80元左右。

火电机组积焦垮塌砸伤水冷壁管事故案例分析与研究

山东某发电厂应用的1号锅炉焦垮塌砸伤水冷壁管故障严重影响设备的安全高效运行。通过对2024年1月24日积焦垮塌砸伤水冷壁管事故进行分析,查明导致该事故的原因3项,暴露设计和技术问题2项,并针对性地提出10项防范措施。通过对塌砸伤水冷壁管事故的研究和分析,为设备的安全可靠运行打下基础。

垃圾焚烧锅炉积灰结焦的影响因素研究

为了研究垃圾焚烧锅炉积灰结焦的影响因素,本文对垃圾焚烧锅炉的炉膛温度、运行时的风量和风温、锅炉结构、运行吹灰这四种因素对锅炉结焦的情况进行了分析。结果表明:800℃以上的炉温有利于防止垃圾焚烧积灰积焦,适宜和风量风温以及按时对锅炉进行吹灰也有利于垃圾焚烧锅炉防止积灰积焦。

加热炉炉管的烧焦

介绍了小型炼油厂常压蒸馏装置加热炉炉管的烧焦方法，指出了烧焦过程中的注意事项。

锅炉与炉窑燃料油使用中的常见问题及解决方法

对燃油锅炉与炉窑使用中的常见问题以及燃料油主要质量指标的优劣对燃烧工况的关联影响进行分析,并提出一种经济实用简便的解决方法,达到改善燃油锅炉与炉窑燃烧工况与抑制硫、钒的腐蚀,灰分积焦、积炭、油泥生成等,又达到降低能耗、减少烟气排放的目的。

油脂与饲料工业锅炉燃料油使用中的常见问题及解决方法

对油脂与饲料工业燃油锅炉使用中的常见问题以及燃料油主要质量指标的优劣对燃烧工况的关联影响进行了分析,并提出了一种经济实用且简便的解决方法,在改善燃油锅炉燃烧工况与抑制硫、钒的腐蚀,灰分积焦、积炭、油泥生成等问题的同时,又达到了降低能耗、减少烟气排放的目的,并列举了一些实例。

MONTE-CARLOSIMULATION OF CATALYST DEACTIVATION

Catalyst deactivation due to coking is microscopically analyzed,then a model is presented,based upon the analogy between coke deposition and solid aggregation.The Monte Carlo simulation results show that the model can fit the experimental data in all cases.With this model,the mechanism of formation of coke with different shapes is derived and the relation between the catalytic activity and coke shape is theoretically demonstrated.In addition,the model described in this paper can also be used to simulate the catalyst preparation so as to make more useful and efficient catalysts.The model in this paper is very simple,with only two parameters that indicate the nature of catalyst deactivation.The extension of the model to more complicated systems is also discussed.

Development and Commercial Application of High-Platinum CCR Catalyst with Low Coke Deposition Rate

By means of selecting proper additives and optimizing catalyst composition and preparation procedures, a high-platinum and low coke deposition catalyst PS-Ⅶ for continuous catalytic reforming （CCR） without reducing its specific surface area has been successfully developed. This catalyst PS-Ⅶ was evaluated in a 100-mL pilot test unit. Study results showed that under the same reaction conditions the newly developed catalyst PS-Ⅶ achieved a 26% reduction in coke deposition as compared to the existing high-platinum CCR catalyst. This catalyst upon its first commercial application in a 1.39 Mt/a CCR unit had exhibited good anti-attrition performance and good stability in terms of its specific surface area. Compared to the original CCR catalyst this PS-Ⅶ type catalyst could reduce the coke deposition by 27.32% when operating on feedstock with low potential aromatic content, along with apparent increase in C6^＋ liquid yield, hydrogen yield and aromatics yield, which could grapple with the problem associated with the catalyst regeneration constraints after CCR capacity expansion to ensure the longcycle high-load operation of the CCR unit.

Foreign Language Enjoyment and Anxiety:Associations With General and Domain-Specific English Achievement

Recent research has confirmed the predictive effect of general foreign language(FL) achievement on Foreign Language Enjoyment(FLE) and Foreign Language Classroom Anxiety(FLCA).However,few studies have examined the effect of domain-specific language achievement in shaping FL learning emotions.The present study thus aims to examine how FLE and FLCA are linked to overall FL achievement and self-perceived achievement in six different domains across listening,speaking,reading,writing,vocabulary,and grammar.A total of 1,415 Chinese senior secondary students participated in the questionnaire survey.Regression analyses showed that 1) both FLE and FLCA were predicted more by self-perceived general English proficiency,while less by actual English achievement;2) perceptions of speaking and grammar competence were significant predictors of both emotions;3) perceived reading competence predicted FLE significantly but not FLCA;and that 4) perceptions of listening,writing,and vocabulary competence predicted neither FLE nor FLCA.The implication is that domain-specificity should be taken into consideration in future explorations of FL emotions.

10%皮维碘软膏在烧伤创面的临床应用

目的：探讨一种新的烧伤创面外用药的抗焦痂下感染能力。方法：本组回顾256例伤者，烧伤面积从5％～40％，深度从浅Ⅱ度～Ⅲ度烧伤病例，采用10％皮维碘软膏行包扎治疗，全身应用抗生素，观察病程中创周炎症反应，焦痂下积脓及创面愈合时间。结果：烧伤后48h创周炎症反应轻微，1周后未见明显焦痂下积脓，无绿脓杆菌感染，创面平均愈合时间17d。结论：10％皮维碘软膏是一种较理想的烧伤创面外用抗感染药物。

ON SOME KEY GEOLOGICAL PROBLEMS RELATED TO THE LINGLONG-JIAOJIA ORE-CENTRALIZED DISTRICT IN SHANDONG PROVINCE,CHINA

The Linglong-Jiaojia ore-centralized district is controlled by the tectonic stress field characterized by the combination of extension and strike-slip, and the dip, dip angle, pitch and pitch angle of the ore bodies are all constrained by the dynamic conditions of the tectonics. The metallotectonic series for the ore-centralized district belong to the type of a combination of extension and strike-slip and can be subdivided into four sub-series. The ore-forming process in the brittle regime can be disintegrated into two stages, i.e., the embryonic fracture stage and the megascopic fracture stage, and ore-forming process is rather common in the ore-centralized district at the former stage. Moreover, several key structural patterns and their features were discussed and a preliminary assessment about the ore-forming prospect in this district was made in the paper.

A Different Kind of Tension:Foreign Language Anxiety From a Positive Psychology Perspective

This study investigates anxiety in foreign language learning from a positive psychology perspective,and in doing so,it considers some of the ways in which anxiety can interact with other aspects of language learner psychology to contribute to improved learning outcomes and improved learner well-being.The paper reports on a small-scale mixed-method study of English learners at a university in northern Japan.It shows how for many learners some of the most anxiety-provoking episodes were also the most rewarding and enjoyable,suggesting a need to reconsider simplistic accounts that present anxiety as an impediment to successful language learning.This is done by shifting to a positive psychology perspective.The paper concludes with a tentative model of how anxiety,when reframed as tension,can function as a core component of a more productive language learning experience.

Characterization of Catalytic Cracking Catalysts Regenerated by Gasifying Deposited Coke

Partially or fully regenerated catalytic cracking catalysts were prepared by gasifying the coke deposited on coked catalysts with a gaseous mixture of oxygen and steam in a fixed fluidized bed （FFB）. The resultant samples were characterized by different methods such as the nitrogen adsorption-desorption analysis, the X-ray diffractometry, the infrared spectroscopy, the ammonia temperature-programmed desorption （NH3-TPD） method, the X-ray fluorescence （XRF） analysis, the transmission electron microscopy and energy dispersive X-ray spectroscopy （TEM-EDX）, the thermal-gravimetric analysis （TGA） and the differential thermal analysis （DTA）. The results showed that exposure of catalyst to steam for about 10 minutes at temperature ≥ 800 ℃ could not cause too much destruction of the catalysts, and an amount of coke equating to about 0.27 m% was enough to block approximately all acid sites in micro-pores of the zeolite catalyst. Coke didn＇t show equal reactivity during coke burning-off that could be accelerated by the catalytic action of nearby metal atoms. However, when the carbon content on the catalyst reached about 2.44 m%, the catalytic action of metals on the catalyst was not evident. The severe thermal and hydrothermal environment during exposure of the catalyst to steam at a temperature in the range of about 860--880 ℃ for 30 minutes could lead to collapse of pore structure and transformation of crystal phase and consequently decrease of the surface area and acid amount on the catalyst.

Carbonate metasomatism in the lithospheric mantle: Implications for cratonic destruction in North China

The activity of melts and fluids may have played a key role in inducing the destruction of the eastern North China Craton in the early Cretaceous. Carbonate melts are important agents in mantle metasomatism and can significantly modify the physical and chemical properties of the subcontinental lithospheric mantle. Carbonate metasomatism can be identified by specific geochemical indices in clinopyroxene, such as high Ca/Al and low Ti/Eu ratios. This study presents the spatial and temporal variations of carbonate metasomatism in the lithospheric mantle beneath the eastern North China Craton. Three types of carbonate metasomatism are classified based on the geochemical compositions of clinopyroxene in mantle peridotites. Clinopyroxene formed by Type 1 carbonate metasomatism is characterized by very high Ca/Al ratios(15–70) and^(87)Sr/^(86)Sr ratios(0.706–0.713). Clinopyroxene derived from Type 2 carbonate metasomatism shows relatively high Ca/Al ratios(5–18) and^(87)Sr/^(86)Sr ratios(0.703–0.706). However, clinopyroxene resulting from Type 3 carbonate metasomatism has low Ca/Al ratios(5–9) and^(87)Sr/^(86)Sr ratios(0.702–0.704). Deep(garnet-bearing) and shallow(spinel-bearing) lithospheric mantle beneath the Sulu orogen and surrounding areas in the eastern North China Craton were affected by intense Type 1 carbonate metasomatism before the late Triassic. The deep subduction of the South China Block with its accompanying carbonate sediments was the trigger for Type 1 carbonate metasomatism, which reduced strength of the lithospheric mantle and provided a prerequisite for the destruction of the eastern North China Craton in the early Cretaceous. After the destruction of the eastern North China Craton, the ancient relict lithospheric mantle, represented by spinel harzburgite xenoliths hosted in the late Cretaceous to Cenozoic basalts,only recorded Type 2 carbonate metasomatism. This implies that the lithospheric mantle experienced the intense Type 1 carbonate metasomatism was completely destroyed and not preserved during decratonization. Spinel lherzolite xenoliths hosted in the late Cretaceous to Cenozoic basalts represent the young, fertile lithospheric mantle formed after the cratonic destruction and only a few samples record Type 2 and 3 carbonate metasomatisms. We suggest that carbonate melts derived from the subduction-modified asthenospheric mantle with variable proportions of recycled crustal material was responsible for the Type 2 and 3 carbonate metasomatisms. The carbonate metasomatism of the lithospheric mantle beneath the Jiaodong Peninsula and surrounding areas is very pervasive and is spatially consistent with the remarkable thinning of lithospheric mantle and giant gold deposits in this region. Therefore, we conclude that carbonate metasomatism in the lithospheric mantle played a crucial part in the modification, destruction and gold deposits in the eastern North China Craton.

Darboux integrability and algebraic limit cycles for a class of polynomial differential systems

This paper deals with the existence of Darboux first integrals for the planar polynomial differential systems x=x-y+P n+1(x,y)+xF2n(x,y),y=x+y+Q n+1(x,y)+yF2n(x,y),where P i(x,y),Q i(x,y)and F i(x,y)are homogeneous polynomials of degree i.Within this class,we identify some new Darboux integrable systems having either a focus or a center at the origin.For such Darboux integrable systems having degrees 5and 9 we give the explicit expressions of their algebraic limit cycles.For the systems having degrees 3,5,7 and 9and restricted to a certain subclass we present necessary and sufficient conditions for being Darboux integrable.