A New Potential Caledonian–Indosinian Ore Concentration Area:Evidence from Diagenesis and Mineralization Ages of the Miao'ershan–Yuechengling Region

Objective The Miao＇ershan-Yuechengling composite granite, located in northern Guangxi at the western section of the Nanling Range, is a multi-period and multi-stage composite pluton with an exposed area of more than 3000 km2 （Fig. 1）. Paleozoic and Proterozoic strata are exposed around it, and magmatic activities mainly occurred during the Caledonian and Indosinian periods. Till now, more than one hundred W-Sn-Mo-Pb-Zn-Cu （U） deposits and ore occurrences have been discovered along the inner and outer contact zones of this granite. Through recent years＇ research, we infer that this area is not only a preferred area for studying granite and mineralization in Caledonian and lndosinian periods, but also a potential Caledonian- lndosinian ore-concentrated area.

Discovery of Ophiolitic Mélange in the North Region of Geji County, Northwest Tibet and Its Zircon U-Pb Age

Objective The Bangong Co–Nujiang River suture zone is the great boundary between the Lhasa and Qiangtang terranes in the Tibetan Plateau.A series of major scientific issues are still controversial at present such as the subduction polarity and evolutionary process of this suture（Wei Shaogang et al.,2017）.

World Population Aged 60 and Over by Region

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The Effects of Regional Climate and Aging on Seasonal Variations in Chinese Women’s Skin Characteristics

OBJECTIVES: Skin characteristics change depending on the external environment such as UV, temperature and humidity. But the research how to affect the regional climate, age and seasonal variation on the skin conditions was not well studied. Therefore, we investigated the seasonal variation in the skin by comparing Beijing women and Guangzhou women by age groups. METHODS: 440 healthy Chinese women participated in this study. The skin hydration, sebum secretion, TEWL and skin pH were measured on the cheek front. All the parameters were analyzed in terms of the age, season and region. RESULTS: The skin hydration in Beijing was lower than that in Guangzhou and significantly decreased during winter than summer. The sebum secretion in their 20s and 30s was significantly high in summer in both regions, and this phenomenon was more remarkable in Guangzhou (p CONCLUSIONS: Skin hydration and barrier function decreased more during a cold, dry winter than summer. The barrier dysfunctions such as an increase in TEWL and pH occurred more commonly in old age groups. The greater the differences between summer and winter climates, the greater damage to skin barrier and skin hydration. The sebum secretion was more affected by hot, humid summers. Further, the aged skin was influenced by seasonal variation except for sebum secretion.

严寒地区现浇钢筋混凝土结构裂缝控制措施分析

针对严寒地区的气候特征,文章对现浇钢筋混凝土结构裂缝的形成原因进行分析,从原材料、设计、施工等方面研究控制裂缝措施,再结合实际工程案例,对严寒地区现浇钢筋混凝土结构出现裂缝现象的具体原因进行剖析,采取有效的裂缝修补措施,满足规范及使用要求。

Exoscopy of Detrital Zircons from Niamey Neoproterozoic Sandstones (Eastern Edge of the West African Craton, Southwestern Niger): Interpretation of Detrital Sediments Provenance

This study focuses on exoscopic analyses of detrital zircon grains of Archean and Paleoproterozoic age, contained in the sediments from the Niamey Neoproterozoic sandstones (Niamey region), with a view to confirming the sediments sources already proposed (Kénéma-Man domain for Archean-age zircons and Baoulé Mossi domain for Paleoproterozoic-age zircons). Exoscopic analysis reveals that Archean zircon grains are more corroded, with rounded to sub-rounded shapes, while Paleoproterozoic zircon grains are less corroded and mostly angular in shape. The strong corrosion of Archean zircon grains, implying long-distance transport, is consistent with the remoteness of the Kenema-Man domain which are the source these sediments. The fact that the Paleoproterozoic zircon grains show little or no wear implies a proximal source of sediments, corresponding to the Baoulé Mossi domain.

Influences of Seasonal Freezing and Thawing on Soil Water-stable Aggregates in Orchard in High Cold Region,Northeast China

Soil aggregate stability,as an important indicator of soil functions,may be affected by seasonal freezing and thawing(SFT)and land use in high cold and wet regions.Therefore,comprehensive understanding the effects of SFT on aggregate stability in orchards during winter and spring is crucial to develop appropriate management strategies that can effectively alleviate the degradation of soil quality to ensure sustainable development of orchard ecosystems.To determine the mechanism of degradation in orchard soil quality,the effects of SFT on the stability of water-stable aggregates were examined in apple-pear orchards(Pyrus ussuriensis var.ovoidea)of four different ages(11,25,40,and 63 yr)on 0 to 5%slopes before freezing and after thawing from October 2015 to June 2016 in Longjing City,Yanbian Prefecture,Northeast China,involving a comparison of planted versus adjacent uncultivated lands(control).Soil samples were collected to investigate water-stable aggregate stability in three incremental soil layers(0–20,20–40 and 40–60 cm).In the same samples,iron oxide,organic matter,and clay contents of the soil were also determined.Results showed that the destructive influences of SFT on water-stable aggregates were more pronounced with the increased orchards ages,and SFT exerted severe effects on water-stable aggregates of older orchards(40 and 63 yr)than juvenile orchards.Undergoing SFT,the soil instability index and the percentage of aggregate destruction increased by mean 0.15 mm and 1.86%,the degree of aggregation decreased by mean 1.32%,and the erosion resistance weakened,which consequently led to aggregate stability decreased.In addition,soil free,amorphous,and crystalline iron oxide as well as soil organic matter and clay contents are all important factors affecting the stability of water-stable aggregates,and their changes in their contents were consistent with those in the stability of water-stable aggregates.The results of this study suggest that long-term planting fruit trees can exacerbate the damaging effects of SFT on aggregate stability and further soil erosion increases and nutrient losses in an orchard,which hider sustainable use of soil and the productivity orchards.

Zircon U-Pb Ages of Bottom and Top Parts of the Zhangjiakou Formation in Lingyuan Area(West Liaoning Province) and Luanping Area (North Hebei Province) and Their Significance

In Lingyuan region of West Liaoning Province, the Zhangjiakou Formation (J_3z) and the Yixian Formation (K_1y) display an angular unconformity. That is, the Lower Mesozoic strata of the Zhangjiakou Formation are ENE (near E-W) oriented, while the overlying strata of the Yixian Formation exhibit an NNE orientation. The results of LA-ICP-MS zircon U-Pb ages show the Zhangjiakou Formation formed from about 130 Ma to 132 Ma in Lingyuan and 135 Ma to 136 Ma in Luanping (North Hebei Province), respectively. Three conclusions can be drawn: (1) The Zhangjiakou Formation in Lingyuan is comparable to that in Luanping, with the volcanic rocks of the Zhangjiakou Formation from Lingyuan being younger than those from Luanping. (2) 5-6 Ma difference between the top of the Zhangjiakou Formation and the bottom of the Yixian Formation in Lingyuan proves the angular unconformity between the two formations; and it reflects that the 5-6 Ma interval period is the main period of the transition of tectonic framework in Mesozoic in North Hebei and West Liaoning. In the interval period, the magmatic action went up to high tide in Mesozoic in the northeast of China. Moreover, after the interval period, the “Rehe fauna” developed into “erupted” period. This reflects that the interval period is also an important biological interface in Northern Hebei and Western Liaoning. (3) The Dabeigou Formation in Luanping should correspond to the upper part of the Zhangjiakou Formation, but not to the lower part of the Yixian Formation.

Burial History and Petroleum Entrapment in the Yaoyingtai Region of the Changling Fault Depression, China

This work aims to reconstruct the burial history of various kinds of sandstones penetrated by the well YS201 in the Yaoyingtai region of the Changling Fault Depression, southern Songliao Basin, China. Analyses of fluid inclusions in the reservoir rocks, combined with a review of the regional tectonic evolution, revealed the hydrocarbon accumulation stage and accumulation age of the Early Cretaceous Denglouku group and the first member of the Quantou group reservoir, which are the future exploration focus for deep gas reservoirs in this region. Acoustic time data and sedimentary rates calculated for sediments in the YS201 well yielded thicknesses for the Yingcheng, Nenjiang, and Mingshui groups of 506, 539.18, and 144.85 m, respectively, thereby revealing the burial history of the sediments in the well. Fluid inclusions of the Denglouku group reservoir and the first member of the Quantou group reservoir contain oil inclusions and hydro-carbonaceous salt water inclusions. The main peaks of the homogenization temperature and salinity of these saltwater inclusions in the first member of the Quantou group reservoir are generally 110-120℃ and 6wt%-8wt%, respectively, and for the Denglouku group are 130-140oc and 4wt%-6wt%. The data for both reservoirs show only one main peak, indicating that they both have experienced single-stage accumulation. Combining the homogenization temperature of the reservoir fluid inclusions with the burial and thermal history of the sediments in the YS201 well, we infer that the hydrocarbon gas in these two intervals accumulated at 79 Ma （middle Late Cretaceous）.

Geochronology,geochemistry and Hf isotopic study of Early Carboniferous granodiorites in Taerqi region,central Daxing'anling and its tectonic implication

Zircon U-Pb age,whole rock geochemical and zircon Hf isotopic data are presented for Late Paleozoic granodiorites from the Taerqi region,central Daxing'anling to constrain its petrogenesis and tectonic implication.LA-ICP-MS zircon U-Pb age data indicates that the Late Paleozoic granodiorites were emplaced with age of333.4 ± 2.2 Ma(Early Carboniferous).Geochemically,the granodiorite samples have Si O2= 60.54%-71.40%,Na2 O = 4.04%--4.66%,K2 O = 1.65%--4.27% and Mg O = 0.96%--3.53%,belonging to medium-K to high-K calc-alkaline I-type granites.They are slightly enriched in large ion lithophile elements(e.g.Rb,Th,U and K) and light rare earth elements,and depleted in high field strength elements(e.g.Nb,Ta and Ti),with εHf(t) values of 8.0--11.8 and Hf two-stage model ages of 586-829 Ma.All these geochemical features suggest that the primary magma was derived from partial melting of Neoproterozoic to Phanerozoic newly accreted lower crust.According to the geochemical data and regional geological investigations,the Early Carboniferous granodiorites formed in an island arc setting linked to the subduction of the Paleo-Asian Oceanic Plate beneath the Xing'an Terrane.This also implies that the Xing'an and Songliao terranes have not amalgamated before the Early Carboniferous.

Genetic Worth Effect Models for Boreal Conifers and Their Utility When Integrated into Density Management Decision-Support Systems

Based on approaches deduced from previous research findings and empirical observations from density control experiments, genetic worth effect response models were developed for black spruce (Picea mariana (Mill) BSP.) and jack pine (Pinus banksiana Lamb.) plantations. The models accounted for the increased rate of stand development arising from the planting of genetically-improved stock through temporal adjustments to the species-specific site-based mean dominant height-age functions. The models utilized a relative height growth modifier based on known estimates of genetic gain. The models also incorporated a phenotypic juvenile age-mature age correlation function in order to account for the intrinsic temporal decline in the magnitude of genetic worth effects throughout the rotation. Integrating the functions into algorithmic variants of structural stand density management models produced stand development patterns that were consistent with axioms of even-aged stand dynamics.

延边朝鲜族自治州城镇收缩:特征、机理与响应

以吉林延边朝鲜族自治州为样本单元,对民族自治区语境下收缩城镇的发展特征、形成机理与响应模式展开了理论探讨与实证验证。结果表明:①吉林延边朝鲜族自治州内部有62.5%的城镇被诊断为收缩城镇,但整个自治州并未被诊断为收缩城市,被识别的5个收缩城镇在产业发展、人口结构、经济理念和土地利用等方面呈现出明显共性;②收缩城镇的形成是中圈功能关联区(整个延边朝鲜族自治州)内部的空间分异“驱动”主导、内圈收缩城镇自身发展转型“挤出”+外圈外部性区域(延边朝鲜族自治州所处的外部环境)空间关联“拉动”辅助共同作用的结果产物;③延边朝鲜族自治州收缩城镇规划响应的路径设计为“加强与中圈功能关联区的融合发展、一体化发展,提升居民幸福指数”。

Tracking and Analysis of Pedestrian’s Behavior in Public Places

Crowd management becomes a global concern due to increased population in urban areas.Better management of pedestrians leads to improved use of public places.Behavior of pedestrian’s is a major factor of crowd management in public places.There are multiple applications available in this area but the challenge is open due to complexity of crowd and depends on the environment.In this paper,we have proposed a new method for pedestrian’s behavior detection.Kalman filter has been used to detect pedestrian’s usingmovement based approach.Next,we have performed occlusion detection and removal using region shrinking method to isolate occluded humans.Human verification is performed on each human silhouette and wavelet analysis and particle gradient motion are extracted for each silhouettes.Gray Wolf Optimizer(GWO)has been utilized to optimize feature set and then behavior classification has been performed using the Extreme Gradient(XG)Boost classifier.Performance has been evaluated using pedestrian’s data from avenue and UBI-Fight datasets,where both have different environment.The mean achieved accuracies are 91.3%and 85.14%over the Avenue and UBI-Fight datasets,respectively.These results are more accurate as compared to other existing methods.

Prevalence and risk factors of infertility in a Mongolian population

Objective:To investigate and analyze the prevalence and risk factors of infertility in a Mongolian population.Methods:We conducted a population-based cross-sectional study between September 2016 and November 2021.Our study population of 1919 participants consisted of residents of Ulaanbaatar city and four regions of Mongolia.A pretested standardized and structured questionnaire was used to gather data from the participants.Our questionnaire comprised categories influencing infertility,such as socioeconomic status,lifestyle factors,health,reproductive history,present status,and sexual function.In addition,trained staff conducted face-to-face interviews with the participants.Results:Our study showed an infertility incidence of 8.2%,with primary infertility at 2.76%and secondary infertility at 5.47%.Compared with the urban area of Ulaanbaatar,the prevalence of infertility was significantly higher amongst the rural population(P<0.001).Risk factors of infertility included advanced age(35-39 years,OR 1.8,95%CI 1.99-6.55;>40 years,OR 2.1,95%CI 2.62-8.55),living rural region(aOR 2.4,95%CI 1.62-3.69),alcohol consumption(aOR 1.6,95%CI 1.11-2.44),chronic diseases(aOR 1.6,95%CI 1.20-2.38),reproductive disease(aOR 2.6,95%CI 1.86-3.88),gynecological operative history(aOR 2.1,95%CI 1.38-3.21),ovarian cyst(aOR 4.2,95%CI 2.70-6.40),gonorrhea(aOR 2.4,95%CI 1.01-6.16),non-malignant uterine cancer(aOR 2.9,95%CI 1.40-6.70),and endometriosis(aOR 4.7,95%CI 1.41-15.62).Conclusions:In Mongolia,the average infertility rate is 8.2%,similar to the average worldwide and is significantly higher in rural communities.Our study shows the most significant risk factors for infertility are age,alcohol consumption,and rural living.In addition,an unfavorable gynecological history and some diseases also pose a risk to fertility.

Automatic Anomaly Monitoring in Public Surveillance Areas

With the dramatic increase in video surveillance applications and public safety measures,the need for an accurate and effective system for abnormal/sus-picious activity classification also increases.Although it has multiple applications,the problem is very challenging.In this paper,a novel approach for detecting nor-mal/abnormal activity has been proposed.We used the Gaussian Mixture Model(GMM)and Kalmanfilter to detect and track the objects,respectively.After that,we performed shadow removal to segment an object and its shadow.After object segmentation we performed occlusion detection method to detect occlusion between multiple human silhouettes and we implemented a novel method for region shrinking to isolate occluded humans.Fuzzy c-mean is utilized to verify human silhouettes and motion based features including velocity and opticalflow are extracted for each identified silhouettes.Gray Wolf Optimizer(GWO)is used to optimize feature set followed by abnormal event classification that is performed using the XG-Boost classifier.This system is applicable in any surveillance appli-cation used for event detection or anomaly detection.Performance of proposed system is evaluated using University of Minnesota(UMN)dataset and UBI(Uni-versity of Beira Interior)-Fight dataset,each having different type of anomaly.The mean accuracy for the UMN and UBI-Fight datasets is 90.14%and 76.9%respec-tively.These results are more accurate as compared to other existing methods.

Gray Matter-Based Age Prediction Characterizes Different Regional Patterns

Dear Editor,The brain experiences ongoing changes across different ages to support brain development and functional reorganization.During the span of adulthood,although the brain has matured from a neurobiological perspective,it is still continuously shaped by external factors such as habits,the family setting,socioeconomic status,and the work environment [1].In contrast to chronological age (CA),brain(or biological) age (BA) is conceptualized as an important index for characterizing the aging process and neuropsychological state,as well as individual cognitiveperformance.Growing evidence indicates that BA can be assessed by neuroimaging techniques,including MRI [2].

1990～2010年中国人口收缩区分布的时空格局演变——基于不同测度指标的分析

在人口收缩内涵界定的基础上,采用总人口和劳动力等直接指标结合出生率、老龄化率等间接指标进行综合测度,在地级尺度和县市尺度上分析了1990~2010年中国人口收缩区的数量变化、空间分布及演化特征(由于获取限制,未包含港澳台地区数据),并对比了不同测度指标和方法之间的差异。主要的研究发现如下:①人口收缩区在数量上有明显的增长,收缩程度呈现出明显加剧趋势;②人口收缩区在中部和西部偏东地区快速扩张,川黔渝地区、长江中游地区、东北地区最为严重;③单一指标在识别人口绝对收缩方面效果较好,而且总人口指标往往比劳动力指标更早的反映一个区域的人口状况;④综合指标测度的方法能够更加全面的判断一个区域的人口发展状况,进而识别出人口处于相对收缩状态的区域;⑤人口收缩在县市尺度上比在地级尺度上表现更为明显,但两者的差异呈缩小趋势。基于以上研究发现,建议政府更加重视区域人口收缩问题及其对社会经济发展的影响。

京津冀与长江三角洲的局部收缩:格局、类型与影响因素识别

文章基于2000年和2010年两次人口普查的短表和长表数据,分别从常住人口、户籍人口、就业人口等指标构建了测度指数对京津冀和长三角两个城市群区域的收缩状况进行了考察,并结合国内外经验和研究区实际,识别分析了影响收缩的五个方面因素。结果表明:(1)京津冀和长三角分别有1/5和近1/2的市县区呈现局部收缩,且这种收缩还在加剧:(2)京津翼的收缩区集中在承德和张家口并遍布翼中南平原,长三角的收缩区呈现空间集聚和连绵状,集中于苏北、浙西南和除合肥、芜湖以外的安徽大部:(3)收缩类型大致可分为:欠发达外围收缩、特大城市中心城区收缩、工矿业收缩、行政区划调整收缩及县域、乡村、小城镇收缩五类;(4)区域经济发展不平衡、城镇化水平差异以及行政等级不同引起的人口流出是导致局部收缩的主要原因,郊区化、去工业化或产业转型、人口结构变化等西方城市常见的收缩表现仅在少数大城市中心城区或部分老工矿城镇有所体现;(5)影响我国城市区域收缩的因素和作用机制非常复杂,且具有突出的区域异质性,是一个值得进一步深入仔细研究的命题。

基于区域伸缩的空间关系表示

区域连接演算(RCC)是定性空间推理的重要基础理论之一。但由于缺乏必要的度量,RCC只是粗略地描述空间拓扑关系而难以对其更准确地描述,也难以利用RCC描述除拓扑关系之外的其它空间关系,如距离、方向等。本文在RCC理论的基础上,提出了区域伸缩演算(RESC)。RESC增加了一个全等CG的原始空间关系,引入了两个新颖的对区域的演算函数,即区域延伸和区域收缩,从而给出了一种以区域为单位的形式化的度量方法。利用RESC,不仅可以扩展RCC-8拓扑关系,而且能以灵活多样的粒度来描述区域间的距离关系、方向关系、位置关系以及运动关系。RESC增强了RCC的空间关系表示能力,拓展了RCC理论的适用范围。

“农进渔退”:近世以来鄱阳湖区域宗族变迁——以余干县瑞洪西岗为中心

渔业是鄱阳湖区传统产业。20世纪下半叶湖区出现了明显的"农进渔退"。这对鄱阳湖区经济、生态与社会产生了重要的影响。宗族是中国传统社会基本组织形式之一。余干县瑞洪西岗村是鄱阳湖区渔业大村,以其为中心考察湖区宗族变迁有其典型性。鄱阳湖区域宗族的滥觞与发展同其渔业关系密切。1949年,国家的刚性介入使宗族迅速走向衰落,但其深层次的原因则是农进渔退使宗族失去了赖以存在的物质基础。随着人民公社的解体和社会经济的发展,宗族得以"复兴",并被赋予新的时代内涵。