Early warning of coal dynamic disaster by precursor of AE and EMR"quiet period"

Efcient and accurate monitoring and early warning of coal dynamic disaster and other disasters can provide guarantee for the efcient operation of mine transportation system.However,the traditional threshold early warning method often fails to warning some accidents.To address above issues,a new early warning method was proposed based on"quiet period"phenomenon of AE and EMR during fracture.It is found that,a"quiet period"of AE and EMR was present before the load reaches the peak stress,which could be used as one of the precursors to warn the imminent failure of coal and rock specimens.MS and AE signals increased abnormally followed by the phenomenon of"quiet period"before the occurrence of coal dynamic disaster on site,and the decrease of MS events in the"quiet period"is about 57%–88%compared with that in previous abnormal increase stage.During the damage evolution of coal and rock,"quiet period"phenomenon usually occurred at 85%–90%of the peak stress,where the slope of damage parameter curve is almost zero.The"quiet period"of the AE-EMR signals and the low change rate of damage parameter before failure provide a theoretical foundation for the coal dynamic disaster warning based on the"quiet period"precursor found in MS-AE-EMR monitoring system.These fndings will help reduce the number of under-reported events and improve early warning accuracy.

Origin of Qipao Fashion in Early Republic Period

The goal of this research is to analyze and discuss the origin of Qipao as women's fashionable wear in the early Republic Period (1911-1949).The origin of Qipao fashion will be discussed in three aspects:1) discussion of the original time,place and consumer group of Qipao fashion;2) analysis of initial style and wear combination of Qipao,3) deduction of the origin of the name Qipao.Besides,the analysis will also be given about Qipao's aesthetic characters,its production,consumption guarantee as well as its social backgrounds.The research will be made on the basis of the principles and methods of history,social psychology of clothing and design,and will use many materials especially historical writings and publications to give a more detailed discussion.Here are some tentative conclusions. Firstly, Qipao as a kind of one-piece dress was not inherited directly from the robe of Banner Style. It was a new fashion in the 1920s, which combined the elements of long vest called Qipao Majia, Wenming Xin Zhuang and the Western dress. Secondly, the Shanghai female students were the pioneering group wearing Qipao in 1925. Thirdly, the gradual acceptance of Qipao was mainly due to its aesthetic characters, production, consumption as well as social backgrounds at that time. And it was the kind of daily wear of many Chinese women after 1927. Fourthly, since Qipao represents the special clothing which integrated Chinese traditional style and the Western fashion in the early Republic Period, Qipao is advised to be taken as a special term to take the place of the previous ones like Mandarin Dress, Chipau and Cheongsam and so on.

An unusual homing behavior found in the Sichuan Partridge during the early brooding period

In this study,we report an unusual homing behavior of the Sichuan Partridge(Arborophila rufipectus)at the Laojunshan National Nature Reserve,Sichuan Province,China.Hen Sichuan Partridges led the chicks back to the nests where they hatched in the evening and roosted there over night.This behavior lasted 6.7±4.3 nights(range=1–15;n=13)after the chicks hatched.At this stage,the hens became very vigilant to predators and human disturbance.If disturbed,they often abandoned the nests immediately and no longer returned thereafter.The ambient temperature at night during the early brooding period of Sichuan Partridge at our study site was^12.4°C.Our findings suggest that hen Sichuan Partridges may make trade-offs between nest predation risks versus the thermoregulatory needs of their young.

On the Feasibility of Early-age English learning

Children's English learning in China attracts more and more people's attention and is on the tendency of starting at an early age. Under the trend of "learning English from childhood", the author has explored the Critical Period Hypothesis and discussed the younger learners' disadvantages and older learners' advantages when learning English. and concludes that early-age English learning is not feasible.

Enlightenment of the Critical Period Hypothesis for the Early English Education

Whether children should learn English as early as possible has been a controversial topic, and one of the focal point is the credibility of the critical period hypothesis.Does critical period hypothesis really exist?How does child's age factor influence English acquisition?Analyzing the problems existing in the early English education based on the critical period hypothesis theory, secondly, investigating child's characteristics and psychological characteristics based on a case study.The research results show that learning English is not the sooner the better; the emphasis is how to ensure the quality.We should Specify children's English education market, and providence environment of language acquisition, attach great importance to the interest, and give full play to children in different stages of learning advantage.Parents and society should correctly treat the early English education, reduce misunderstanding and promote the healthy development of children's English education.

Research on the Influence of Early Experience on the Growth Rate of Science and Engineering Graduate Supervisors

This research is based on three northeastern double first-class polytechnic universities.A total of 1628 science and engineering graduate supervisors?resumes were referred to from an official website by the random sampling method,of which only 500 supervisors were included in consideration of complete information,key events,and time in terms of the educational background(undergraduate school,graduate school,doctoral school,number of masters,number for Dr.),early work background(number of postdocs,number of overseas visits,numbers of research work),and the growth rate(period from graduation to associate professor title).The higher education background and early work background were defined as early experience,and the database of these 500 science and engineering graduate supervisors with complete resume information from three double first-class universities in northeastern China was established.In this study,the growth rate of the growth period was divided into two at the critical period:the growth rate of the graduate supervisor to associate professors.Through stepwise multiple regression analysis,it was found that higher education background(undergraduate schools,graduate schools,doctoral schools,as well as the number of master's and doctorate degrees)as well as early work background(number of postdoctoral work,research work,and overseas visits)have a significant impact on the growth rate of graduate supervisors to associate professors.

Paleoclimate Changes during the Early Oligocene in the Hoh Xil Region, Northern Tibetan Plateau

Sedimentological, cyclic-stratigraphic, paleomagnetic, and clay-mineralogical studies on the early Oligocene Yaxicuo Group in the Hoh Xil Basin, the largest Cenozoic sedimentary basin in the hinterland of the Tibetan Plateau, provide abundant information of paleoclimate changes. A 350-m thick section in the middle-lower Yaxicuo Group was analyzed to reveal the climatic history that occurred in the Hoh Xil region during the early Oligocene interval 31.30-30.35 Ma, dated with the paleomagnetic chronostratigraphy. The results indicate that arid and cold climate dominated the Hoh Xil region during the early Oligocene in general, being related to the global cooling and drying events that occurred in the earliest Oligocene. Within this period, relatively warm and wet climate accompanied by strong tectonic activity occurred in the 31.05-30.75 Ma interval; while arid and cold climate and relatively inactive tectonics occurred in the 31.30-31.05 and 30.75-30.35 Ma intervals. Furthermore, spectral analyses of high-temporal resolution paleoclimatic records show orbital periods including eccentricity, obliquity, and precession. It is concluded that paleoclimate changes during the early Oligocene in the Hoh Xil region were forced by both tectonic activity and orbital periods.

Metallogenic Mechanism and Tectonic Setting of Tungsten Mineralization in the Yangbishan Deposit in Northeastern China

The Yangbishan iron-tungsten deposit in the Shuangyashan area of Heilongjiang Province is located in the center of the Jiamusi Massif in northeastern China. The rare earth element and trace element compositions of the scheelite show that it formed in a reducing environment and inherited the rare earth element features of the ore-forming fluid. The geochemical characteristics of the gneissic granite associated with the tungsten mineralization show that the magma formed in this reducing environment and originated from the partial melting of metamorphosed shale that contained organic carbon and was enriched with tungsten. In addition, in situ Hf isotopic analysis of zircons from the gneissic granite indicates that they probably originated from the partial melting of a predominantly Paleo-Mesoproterozoic crustal source. According to LA-ICP-MS zircon dating, the Yangbishan ore- related gneissic granite has an Early Paleozoic crystallization age of 520.6 ＋ 2.8 Ma. This study, together with previous data, indicates that the massifs of northeastern China, including Erguna, Xing＇an, Songliao, Jiamusi, and Khanka massifs, belonged to an orogenic belt that existed along the southern margin of the Siberian Craton during the late Pan-African period. The significant continental movements of this orogeny resulted in widespread magmatic activity in northeastern China from 530 Ma to 470 Ma under a tectonic setting that transitioned from compressional syn-collision to extensional post- collision.

Geometric investigation of entrance proportions of houses from the Qajar to the beginning of the early Pahlavi in Dezful City(1789—1979)

Due to the importance of the historical context of Dezful City,investigating historic buildings is necessary.But unfortunately,a large part of it is being destroyed.For this reason,it is essential to discover the guidelines and logic behind the architectural design of these buildings to help their reconstruction or restoration.Regrettably,there is no logical information about the components of this context and the reconstructions are usually done according to taste and based on architecture tested or personal preference.Therefore,it is necessary to find a logic behind these critical components that support the whole plan or parts of it in a particular style.The purpose of this research is to discover and find the logic behind the design of this building in the historical context of Dezful.Finding geometrical proportions can significantly help to reconstruct buildings better and more accurately.For this purpose,30 historical houses of Dezful were randomly selected,and their input information was drawn in 2D form in AutoCAD.Then,the length,width,and height proportions were measured,and the obtained ratios were compared with the golden proportions and dynamic rectangles.This paper studies entrance based on ratios of√2,√3,√4,√4,√1.25 andφ(the golden section).The results show that golden proportions and proportions derived from dynamic rectangles are present in the wording of all cases.Moreover,the range of ratios in the plan is from 1.34 to 2,and the content of changes in the section is from 1.22 to 2.The results can help architects,and particularly building owners,to reconstruct based on existing logic by discovering the proportions of the entrances of the houses.It is possible to administer a part of the damaged tissue and estimate its dimensions and sizes because the proportions’completeness can help revive half-destroyed historical buildings.

CHINESE LADY'S DAILY WEAR IN LATE QING DYNASTY AND EARLY REPUBLIC PERIOD

The goal of this research is to describe and analyze women’s wear in the late Qing Dynasty andearly Republic Period(late 19th c.—early 20th c.),with an emphasis on the daily informal orsemi-formal wear,though some formal or ceremonial costumes such as wedding dress will also beincluded.This study will use Chinese costumes and textiles from many museums to fill in theblanks left by previous research and to give a more detailed and accurate description.It will alsouse historical documents to find the original names of these items and to illustrate a general conceptof their usage on different occasions.The different categories of women’s wear will be described in the following order:①robes orcoats;②jackets;③waistcoats or vests;④skirts;⑤pants and leggings;⑥shoes and socks;⑦headdresses;and⑧others.Of every category,the textiles,decoration,cut,form,style,colourand motif will be discussed.The way in which these items were combined will also be discussed.The comparison between women’s wear and men’s wear,women’s and children’s informal andformal dress will be given.Here are some tentative conclusions.First,the Manchu and Han style coexisted and mixedwith each other and were worn by both Manchu and Han women.Second,the basic silhouettesand cuts were relatively stable and conventional,while the decorations and details(openings,fasten-ings,pleats,vents,collars and hemlines)were different.The former represented accepted socialstandards while the latter could be a matter of personal taste.Third,women’s wear in that periodwere highly stylized,miscellaneous,elaborate,detailed,multicolored and multi-thematic.

A Typical Production and Elimination Process of Particles in Beijing during Early 2008 Olympic Games

[Objective] The aim was to discuss he produce and elimination rules of particles in Beijing during early 2008 Olympic Games. [Method] Based on the analysis of particulate matter online observation data and meteorological data during the corresponding period in Chinese environmental science college, Hysplit Back trace model and Numerical weather prediction graphs, and combined with the different analytical methods on meteorological flow fields, a typical process of particles in Beijing during early 2008 Olympic Games was studied. [Result] The results indicated that during the ascent stage of PM2.5 concentration, the PM showed gradually aging phenomena; the process controlled by large scale synoptic system mainly. And the weak wind and the high humidity were not in favor of dispersion; the prolonged southerly air mass to bring the pollutant of Hebei, Taijin and Shandong to Beijing; mixing height and temperature curve took the importance role to the pollution. [Conclusion] The study provided theoretical basis for the discussion on factors influencing the production and elimination of particles in the air pollution process.

Social Classes and Cultural Connotations of Yangzhou Home Gardens during the Late Qing Dynasty and the Republic of China

During the late Qing Dynasty and the early period of the Republic of China(1870-1930),the social classes in Yangzhou were basically dominated by officials,businessmen,and scholars.In the building number,scale,and functional evolution of their home gardens,these three classes were different,reflecting abundant connotation of characteristic of the time and regional culture,revealing the inheritance path of Yangzhou culture,as well as the richness and diversity of home gardens in Yangzhou during the late Qing Dynasty and the early period of the Republic of China.

＂Trades＂ and ＂Social Membership＂ into the Context of Feudal Friulian Society during Late Middle Ages （13th Century- 1511）

It is a very hard job for historians to keep themselves neutrals in from of the events they find during their studies. It is also difficult to notice the correlations among the different times of the history without falling in anachronistic mistakes. In fact, it is well-known that a historian must be wise and rational when he finds those correlations, because every society has its own characteristics, structures, and mentality. This brief essay focuses on the social structures in a north eastern italic region, which is called Friuli, between the 12th and 16th centuries. In the above mentioned centuries, it is possible to notice an evolution from a feudal ecclesiastical principality, ruled by prince-patriarchs, ecclesiastical institutions and nobility, to a more fluid and dynamic constitution formed by new classes which rose up in times of urban and economic development. But this development struggles to delete the old system, which persisted until the end of 18th century with the arrival of Napoleon. The transition from the Patriarch＇s power to Venice＇s dominion seems to have created two main consequences： by one hand a more bureaucratic and modem structure of the State, by the other hand a consolidation of the old connections between patrons and clients, consequence of the ＂modem＂ feudal system that consolidated its roots in the Late Middle Ages centuries.

Brief Analysis on the Earlier the Better in SL Learning

With the intense globalization and human migration,a worldwide attention to multiple languages,cultures and abilities to communicate effectively with people across languages and cultures has been aroused. Under such circumstance,the switch to an earlier start of second language introducing in school appears to be an international phenomenon. This paper just aims to make a discussion on the idea of the earlier the better in SL learning.

Early warning prevention and control strategies to reduce perioperative venous thromboembolism in patients with gastrointestinal cancer

BACKGROUND Venous thromboembolism(VTE)is a major cause of unexpected and perioperative in-hospital deaths.It is characterized by high morbidity,high mortality,high misdiagnosis rate,and high missed diagnosis rates.VTE is a common postoperative complication in cancer patients.VTE is preventable,and early identification of risk factors leading to VTE and appropriate early preventive actions can reduce its occurrence and mortality.Presently,there is no uniform standard for the prevention and control of VTE in clinical practice,and hospitals in China lack mature and effective protocols for the assessment,prevention,and treatment of VTE.AIM To explore whether an early warning program could influence the occurrence of deep vein thrombosis(DVT)postoperatively.METHODS This is a comparative retrospective cohort study,which enrolled patients who underwent laparotomic or laparoscopic gastrointestinal tumor resection for gastrointestinal cancer between January 2016 and December 2019.Patients were divided into a control group and an early warning group depending on whether or not the early warning program was implemented.A venous thromboembolism prevention and control team was established.The outcomes included the occurrence of DVT,the correct rate of VTE assessment,the coagulation indicators,and the mastery of VTE knowledge by the nurses.RESULTS A total of 264 patients were included in this study,with 128 patients in the control group and 136 patients in the early warning group.The occurrence rate of DVT in the early warning group was 6.6%(9/136),compared with 14.1%(18/128)in the control group(P<0.05).The correct rates of VTE risk assessment by the nurses and standard implementation rate of VTE preventive measures were 86.8%vs 65.6%and 80.2%vs 57.8%in early warning and control groups,respectively(all P<0.001).The independent factors associated with postoperative DVT occurrence were age(OR=1.083,95%CI:1.070-3.265,P=0.032),Hyperlipidemia(OR=1.127,95%CI:1.139-2.564,P=0.042),preoperative high VTE risk(OR=2.131,95%CI:1.085-5.178,P=0.001),time of operation(OR=2.268,95%CI:2.005-5.546,P=0.026)and not adoption of early warning prevention(OR=3.747,95%CI:1.523-6.956,P=0.017).CONCLUSION The early warning strategy was independently associated with the decreasing occurrence of VTE,and it might be suitable for protection from VTE in patients undergoing gastrointestinal cancer surgery.

Fast Track Extubation Post Coronary Artery Bypass Graft: A Retrospective Review of Predictors of Clinical Outcomes

Introduction: Fast track (FT) cardiac surgery and early extubation (EE) are aimed at safe and effective rapid post-operative progression to discharge, and have been practiced for more than two decades. Their goal is to optimize patient care perioperatively in order to decrease costs without negatively affecting morbidity and mortality. However, the factors that predict successful EE are poorly understood, and patients with significant co-morbidities are frequently excluded from protocols. We hypothesize that independent of disease severity, early extubation leads to shorter hospital stays and can be performed safely without negatively affecting outcomes. Materials and Methods: We performed a retrospective review of 919 patients who underwent coronary artery bypass grafting (CABG) at the Southern Arizona Veteran’s Affairs Health Care System medical center over 7 years. We collected pre-operative data regarding patients’ NYHA classification, presence and severity of cerebral vascular disease, peripheral vascular disease, pulmonary disease, diabetes and hypertension. Intra-operative variables were also recorded including ASA scores, ischemic times, and time to extubation. Finally, post-operative variables such as rates of reintubation and tracheotomy, and both length of ICU and total hospital stay were also compared. Results: Prolonged periods of ischemia were found to predict a delayed extubation (HR = 0.992;CI = 0.988 - 0.997, p = 0.0015) while small body surface area (HR = 1.57;CI = 1.13, 2.17, p = 0.007) and higher pre-operative functional status of the patient, such as independent versus dependent status (HR =1.68;CI = 1.30 - 2.16, p = 1.33;CI = 1.03 - 1.70, p = 0.03) were found to be associated with earlier extubation. The early extubation (EE) group (those extubated in less than the median 7.3 hours) had an average hospital stay of 5.1 ± 4.0 days, versus 7.8 ± 8.1 days in the delayed group (>4 hours), p Conclusions: In our study population, pre-operative functional class and total body surface area predicted those patients able to tolerate early extubation after cardiac surgery. Prolonged ischemia resulted in delayed extubation. Patients that were extubated in less than 4 hours had shorter ICU and hospitalization stays, while there was no significant difference between the two groups in rate of reintubation or tracheotomy.

Four Rare and Unusual Dedications From Areas of Viminacium and Nais

In the areas of Viminacium and Nais four rare and unusual votive dedications were identified.These are the dedications Deus Aeternus,Dii Angeli,Hero(Viminacium),and Atta(Naissus).The dedications Deus Aeternus and Dii Angeli may perhaps indicate Christianity,while the dedications Hero and Atta may indicate settlers of Greek origin.The dedication to goddess Atta could have been made by a freed man,since her cult was to an extent related to the cult of Heracles who,thanks to his loyal service to Omphale,where he was to repent his sins,was freed from slavery,and thus was also a protector of freed man.Main methodological approach in this paper is the analysis of cults as well as their backgrounds as conditions for their realisation.Until now for the territory of Serbia there was not corpus of analyzing cults.There is only corpus of grave and votive monuments for the territory of Serbia with very rare and sporadic comments of cult.So,the main topic of this article is analyzing of cults.It includes the main meaning of the cult,dateing of monuments and historical and archeological backgrounds of the cults.At the same time it was the main method in the analyzing of the mentioned votive monuments.By this method as the result appeared the dateing of the monuments and improvement of existing Greek settlers.At the same time there were the main research questions which should be ensolved.For ensolved the dateing of the monuments was used the system of analyzing syllabic formulae and for the improvement of existing Greek settlers the method of“healty mind”and connections of analogies.As a result the dateing of monuments of Deus Aeternus,Dii Angeli,and Hero was early 2-nd century,and for Atta from the beginning of 2-nd to the end of 3-rd century.

基于风险评估模型的传染病预警体系的建立

目的建立一套基于风险评估模型的传染病预警体系,推动传染病管理水平的提升。方法通过搜集、整理最新的研究成果,参考相关的传染病预警评价指标体系的理论框架,构建基于风险评估模型的传染病预警体系。结果本次研究共纳入了12名专家,筛选出了三个一级指标,涉及流行前期指标、典型症状期指标、非典型症状期指标等,同时涉及7个二级指标。体系的必要性平均得分为8.27±0.24分,可获得性平均得分为7.74±0.34分。结论基于风险评估模型的传染病预警体系的建立有利于当地及时掌握传染病流行趋势,并进行调查指标分布趋势分析,然后提出相应的预警方案,可为有效预防传染病提供相关的依据。

“功在国家,利在自己”:新中国初期的保本保值储蓄

1950年3月,国家统一财经工作之后,物价趋稳,人民币币值进一步稳定。为消除民众对物价能否长期稳定的顾虑,国家银行在折实储蓄的基础上开办了保本保值储蓄。保本保值储蓄的适宜举办,对民众来说,改善了生活,增强了储蓄兴趣,初步建立了储蓄习惯;对于国家来说,聚集了社会闲散资金,支援了新中国国家建设。同时,保本保值储蓄的实施,为货币储蓄奠定了基础,也扩大了人民政府的政治影响,体现了新制度的优越性。