Study on the geological conditions of metallogenesis of the Shazi large-scale anatase deposit in Qinglong County, Guizhou Province

The Shazi large-scale anatase deposit in Qinglong County, Guizhou Province, has been discovered recently and now is under exploration. Investigations show that the orebodies mostly occur at the top of the karst unconformity of the Middle Permian Maokou Formation strata and at the bottom of the Emeishan basalt. And the following three prerequisites should be satisfied for the formation of the deposit: 1) there must be the material source of anatase; 2) there must be weekly alkaline media and low-tempeature and low-pressure conditions; 3) there was no high-temperature and high-pressure environment subsequently for the transformation of anatase into rutile. In the Emeishan basalt of western Guizhou, the element Ti mostly entered the silicon-oxygen tetrahedra of picrite in heterovalent isomorphism(Ti4++Al3+→Mg2++Si4+). When volcanic ejecta resultant from strong eruption of the Emeishan basalt magma fell into water, picrite was usually dissociated to chlorite. Thus, the element Ti4+ in the picrite could be released from the silicon-oxygen tetrahedraa of picrite into water, and conbined with oxygen in the water to form Ti O2. This paper has proved that this deposit, enriched in anatase, discovered recently at Shazi, Qinglong Country, Guizhou Province, is a residual-deluvial-type deposit. Its genesis can be explained as follows. Volcanic clastics formed at the early stage of strong eruption of the Emeishan basalt magma were chemically deposited to form anatase in the low-temperature, low-pressure and weekly alkaline waters in the karst depressions at the top of the Maokou Formation(limestone) strata. The anatase was then dissociated owing to weathering and leaching during the Quaternary and the anatase was further enriched to form the residual-deluvial-type anatase ore deposit.

Physicochemical Conditions during the Formation of Dalingkou Ag-Pb-Zn Deposit,Zhejiang Province

On the basis of mineral paragenesis and the chemistry and homogenization temperatures of fluid inclusions,the physicochemical parameters were calculated for the formation of the Dalingkou Ag-Pb-Zu deposit in Zhejiang.From the early to the late stage of mineralization the ore-forming temperature veriation was found to be 298.5 ℃→267.0℃→217.6℃→167.3℃,with a corresponding pH change of 3.0-5.8→6.1→6.7→5.0→7.3.The pressure changed from 403.8to 128.5atm,and logfS2-9.9→-11.2→<-15;logfO2<-44→-45.6--42.6→>-44.2;and logf CO2 around -1.55.In conjunction with geological observations.the deposit is considered to be of meso-epithermal origin,i.e.,it was formed after continental volcanic-subvolcanic activity.The major factors affecting ore precipitation are the decreasing temperature and the increasing pH of ore-forming solutions.

A Study on the Supply Conditions of College and University Graduates in Liaoning Province

This study investigates the supply conditions of college and university graduates in terms of total quantity and incremental quantity,analyzes the influencing factors of college and university enrollments,including regional population and GDP level,and finally,probes into the specialty construction situation of colleges and xiniversities in Liaoning Province,in order to further investigate the construction situation in each discipline,and thereby making an in-depth analysis of its development.

Oral health status in Sichuan Province: findings from the oral health survey of Sichuan, 2015–2016

To investigate oral health status in the residents of Sichuan Province, southwest China, a cross-sectional study was performed using the latest Oral Health Survey Basic Methods recommended by the World Health Organization. A multistage stratified random cluster-sampling method was used to enroll participants from the following three groups： children aged 3-5 years, adolescents aged 12 years, and people aged 65-74 years. In these three groups, the mean numbers of teeth that were affected by caries were 3.28, 0.86 and 5.13, respectively, resulting in a prevalence of 63.47%, 37.20% and 83.20%, respectively. Relative to the high rate of decayed teeth, the prevalence of fillings was very low in all age groups （0.97%, 7.24% and 5.43%, respectively）, In the 12-year-old adolescent group, only 3.61% had good pit and fissure sealing. In addition, the rate of dental fluorosis was 24.80%, and the Community Fluorosis Index value was 0.39. In the elder group, the community periodontal index was 2.92. The prevalence in the elderly of having lost at least one tooth was 75.54%. Additionally, 4.44% of these participants were edentulous. The incidence of dental prosthesis was 51.75%, the proportion with a removable partial denture, a fixed denture, full dentures, dental implants and an informal fixed bridge was 21.59%, 11.45%, 4.64%, 0 and 16.67%, respectively. In this study, 8.2% of the elderly participants were affected by different types of oral mucosal lesions. Among such lesions, recurrent aphthous ulcers were most prevalent （2.69%） and oral lichen planuses were second （1.6%）. The conclusion presented in this survey is that oral diseases, especially dental caries and periodontal disease, are frequent and common in Sichuan province, China. Moreover, the treatment rate is very low, and primary prevention and treatment options are therefore urgently needed in this population.

Physicochemical conditions in affecting the distribution of spring phytoplankton community

To better understand the physicochemical conditions in af fecting regional distribution of phytoplankton community, one research cruise was carried out in the Bohai Sea and Yellow Sea during 3 rd and 23 th May, 2010. The phytoplankton community, including Bacillariophyta(105 taxa), Pyrrophyta(54 taxa), Chrysophyta(1 taxon) and Chlorophyta(2 taxa), had been identified and clearly described from six ecological provinces. And, the six ecological provinces were partitioned based on the top twenty dominant species related with notable physicochemical parameters. In general, the regional distributions of phytoplankton ecological provinces were predominantly influenced by the physicochemical properties induced by the variable water masses and circulations. The predominant diatoms in most of water samples showed well adaptability in turbulent and eutrophic conditions. However, several species of dinoflagellates e.g., Protoperidinium conicum, Protoperidinium triestinum, Protoperidinium sp. and Gymnodinium lohmanni preferred warmer, saltier and nutrient-poor environment. Moreover, the dinoflagellates with high frequency in the Yellow Sea might be transported from the Yellow Sea Warm Current. The horizontal distribution of phytoplankton was depicted by diatoms and controlled by phosphate concentration, while the vertical distribution was mainly supported by light and nutrients availability in the subsurface and bottom layers, respectively.

Analysis of Meteorological Condition for Infection of the Pathogen of Tobacco Brown Spot (Alternaria alternate)

[Objective] The paper was to understand the suitable meteorological indexes and key meteorological factors for infection and prevalence of tobacco brown spot. [ Method] Tobacco brown spot disease in five topical mountainous climatic areas of Guizhou Province was investigated, and the difference of biological characteristics of different strains was analyzed indoor. Different meteorological conditions （light, temperature and humidity） were simulated in artificial climate box by using the uniform design method, and the difference of infection ability of Alternaria alternate in different climate zones was analyzed in leaves in vitro by hanging drop method. [ Result] The infection rate of A. alternate in different climate zones of Guizhou Province showed certain difference. In low temperature and mid- die humidity （the humidity is 50% -60%, the temperature is 10 -20 ℃） conditions, the pathogen could infect tobacco leaves, various strains had certain difference, but the difference was small. [ Conclusion] The paper provided theoretical basis for prevalence prediction and control of tobacco brown spot.

Response to Hydrothermal Change of Tree Radial Growth since 1990s in the Southern Taihang Mountains in Hebei Province

On the basis of the relationship between tree ring width of Pinus tabulaeformis in the southern Taihang Mountains in Hebei Province and climate factors, such as mean temperature, mean maximum temperature, mean minimum temperature and precipitation, we find that tree-ring width correlates positively and significantly with mean and maximum temperature in March and Spring, and with minimum temperature in March, April, Spring and Autumn. The sampling tree radial growth responds sensitively to spring temperature change.

Response of Vegetation Cover to Climate Changein the Southern Taihang Mountains in HebeiProvince

The relationships between the normalized difference vegetation index(NDVI)(1981-2006) in growing season and precipitation, NDVI and mean temperature(T_(mean)), NDVI and maximum temperature(T_(max)), NDVI and minimum temperature(T_(min)), and NDVI and the Palmer Drought Severity Index(PDSI) were analyzed. The results indicated that NDVI during the growing season was mostly positively and significantly correlated with precipitation last month and the month before last, and mostly negatively with temperature. There were negative and significant correlation between NDVI in June and July and T_(mean)and T_(max)in May respectively, between April NDVI and T_(min)in February and March, and between June NDVI and T_(min)in April, May and June. Vegetation cover in growing season correlated positively with PDSI, especially those last month and the month before last at 0.05 significance level, even 0.01 level. Hydrothermal conditions from March to July had significant influence on vegetation cover.

Occurrence Conditions and Process Analysis on Fluidization of Valley Type Landslide:Example of the Fluidization of Landslide in Qiongshan Ravine, Danba

A big debris flow which was arosed by landslide occurrence at night on July 11, 2003 in Qiongshan Ravine, Danba, Sichuan Province. According to the research, debris flow in Qiongshan Ravine is arosed by the fluidization of landslide. It had been rained about 70 days before debris flow occurred. That made the sediments in the gully to near to saturated or saturated in water. Being affect by the steep geography, the sediments occurrence peristalsis to transform, parts of soil bodies start disintegrate. All the sediments become transforming with water inleakaging to sediments, and than foreside slope flow to gully quickly after becoming fluidization. And the sediments come into being the debris flow with the water of the gully joining.

Application of Farming Culture in the Construction of Eco-Park —A Case Study of Baiyunzhai Demonstration Eco-park in Chongqing City

Definitions and features of eco-park and theme park were introduced as well as their differences, it was proposed that by applying cultural themes suited to regional ecological resources in the construction of eco-park, the eco-park could achieve not only desired ecological benefits, but also social and economic benefits, and the optimal comprehensive benefits. Design of Baiyunzhai Demonstration Eco-park was taken for an example, integration of eco-park and farming culture was confirmed as the nature, principles of "adaptation to actual conditions, amended protection and construction of plant system" proposed, three functional areas of "Colorful Forest Belt, Yiyun Health Maintenance Zone, Lakefront Meditation Zone" are given on the basis of actual terrains, planning highlights and desired landscape effects expounded to promote the value of regional cultures in Chongqing by building Baiyunzhai Eco-park.

Abstraction, Actuality and the Conditions of Relevance

本篇是英国应用语言学家H.G.威多森(Widdowson)1985年在广州“中国英语教学国际讨论会”上的发言。作者对下面三种关系提出了自己的看法:1)抽象的语言描写和具体的语言使用;2)外语教学中的“教”与“学”;3)教学大纲和教学法。作者认为,语言教学应以什么样的语言学理论为基础,采用什么样的教学大纲和教学方法,必须根据不同的具体教学环境和目的作出不同的选择。

老年人群慢性病共病模式与失能状况的关联研究:基于四川省抽样调查

背景随着人口老龄化的进展,慢性病共病和失能老年人的数量与日俱增,给社会带来沉重的医疗负担。共病和失能联系紧密,但目前关于共病模式和失能状况的相关性研究较少。目的本研究旨在以四川省为例识别我国老年人群中常见的慢性病共病模式,并从个体层面探讨不同共病模式与失能状况之间的相关性。方法于2022年8—11月采用定额随机抽样方法在四川省抽取501例60岁及以上的老年人群样本,收集其慢性病患病状况、失能状况及一般人口学等信息。通过自组织映射神经网络和K-Means相结合的二次聚类方法,识别老年人群的常见共病模式。基于2021年国家医疗保障局首个《长期护理失能等级评估标准(试行)》判定样本的失能等级,应用逻辑回归模型探究慢性病共病模式与失能等级之间的关系。结果501例样本中,共病患病率为62.3%(312/501),失能率为74.3%(372/501);最终确定6种共病模式:关节炎或风湿病-高血压模式;血脂异常-高血压模式;肾脏疾病-关节炎或风湿病模式;癌症-关节炎或风湿病模式;哮喘-高血压-消化系统疾病模式;情感精神-记忆相关疾病模式。二分类逻辑回归分析结果显示,共病人群的失能风险是无共病人群的6.3倍(OR=6.3,95%CI=3.9~10.3,P<0.05)。多因素多分类逻辑回归分析结果显示,6种共病模式的失能风险均增加(P<0.05);其中情感精神-记忆相关疾病模式的共病人群失能风险最大,是无共病人群的10.7倍(OR=10.7,95%CI=1.7~63.6),其次是癌症-关节炎或风湿病模式(OR=7.8,95%CI=2.4~24.8)。结论四川省老年人共病患病率较高,多种共病模式均与失能的发生显著相关,尤其是情感精神-记忆相关疾病模式和癌症-关节炎或风湿病模式。医疗卫生保健系统应重点关注患有共病的老年群体,基于不同共病模式制定精准有效的长期护理政策和策略,预防延缓失能的发生、发展,提高老年人健康福祉,节约社会医疗卫生资源。

甘肃北山红柳园—辉铜山地区成矿地质条件、地球化学特征及找矿新发现

甘肃北山红柳园—辉铜山地区位于甘肃北山南带,是形成铜、镍、铁、铅锌、钼、金、银等矿床的有利地区,具有较好的找矿潜力。通过开展成矿地质条件分析,总结控矿关键因素,依据水系沉积物地球化学特征,确定Au、Ag、As、Sb、Hg、W、Sn、Ni、Cu为区内主要的成矿(伴生)元素。Ni、Cu异常与基性-超基性侵入岩的分布有关,Au异常受华力西中期似斑状花岗岩及加里东晚期石英闪长岩控制明显,与区域性断裂及其旁侧平行或“入”字斜交的次级断裂关系密切。异常查证新发现铭扬铜镍矿、杨帆金矿等多处矿点及矿化线索,结合区域地质、物探、化探特征,优选出4处具较大成矿潜力的找矿远景区,尤其是早古生代铭杨铜镍矿的发现,实现了北山地区近年来铜镍矿找矿新突破。研究成果可为下一步找矿勘查部署提供重要依据。

陕西省环境气象条件评估指数时空变化特征研究

基于陕西省10地市2015—2020年PM_(2.5)浓度实况监测数据和气象条件评估指数EMI,统计分析EMI和PM_(2.5)相关性及近年EMI的时空分布特征,定量评估气象条件变化及综合治理措施对陕西环境空气质量的影响。结果表明:陕西省2015—2020年EMI可较好地表征和评估气象条件变化导致的PM_(2.5)浓度变化。2015—2020年EMI呈线性降低趋势,气象条件持续向好。月EMI均呈明显的单谷分布特征,EMI冬半年大,夏半年小。各区域EMI总体上呈关中高、陕南次之、陕北最低的分布特点,关中中部、东部EMI最大。EMI正距平百分比高值区主要分布在关中地区,各年关中均有60%以上面积正距平,其中2016年冬季关中83.0%面积正距平,37.5%面积正距平超过100%。2020年陕西省各区域环境空气质量较2015—2019年均有明显改善,全省PM_(2.5)浓度较前5 a平均降低24.8%,全省气象条件改善使PM2.5浓度较近5 a降低16.4%,排放变化使得PM_(2.5)浓度较前5 a平均下降9.4%,可见,近年陕西省大气污染综合治理措施成果显著,环境质量明显改善。

不同发酵工艺对浙产六神曲中5种成分含量变化的影响

目的建立同时测定浙产六神曲中苦杏仁苷、香草酸、芦丁、阿魏酸、槲皮素的高效液相色谱法,并考察不同发酵条件对浙产六神曲中5个成分含量变化的影响。方法对同一批次六神曲样品,通过设置不同的发酵条件(温度为25℃、30℃、35℃,相对湿度为60%、70%、80%、90%)进行发酵并分别取样。色谱柱为Chrom Core AR C18柱(4.6 mm×250 mm,5μm);以乙腈为流动相A,0.08%磷酸水溶液为流动相B,进行梯度洗脱;流速为1.0 ml/min,柱温为30℃,检测波长220 nm。分析苦杏仁苷、香草酸、芦丁、阿魏酸、槲皮素5种成分的变化。结果苦杏仁苷、香草酸、芦丁、阿魏酸、槲皮素在选定质量浓度范围内线性关系、重复性、稳定性良好,平均加样回收率均达到要求。浙产六神曲最佳发酵工艺参数为温度30℃,相对湿度80%,发酵时间为3 d。结论本研究建立的方法操作简便、结果准确、重复性及稳定性均较好,可用于浙产六神曲的质量控制。浙产六神曲最佳发酵工艺参数为温度30℃,相对湿度80%,发酵时间为3 d。

新时代我国农村养老工作的展望

农村养老在我国具有特别重要的实际意义,必须从政治高度认知农村养老的重要性,要依据国情、因地制宜讲好农村养老的中国故事;坚持以人民为中心的发展思想,积极推进供给侧改革,以农村养老服务中心建设为抓手,促使各项养老服务更接地气;全力激活农村家庭养老功能,在继续弘扬家庭养老传统的同时,支持家庭承担更多养老功能;不断丰富创新农村互助养老模式,在政策指引下县乡村各有侧重,同时健全三级养老服务网络;盘活房、地等资源,奠定农村养老的物质基础,积极进行“以地养老”探索;加强农村养老服务保障机制,通过五社联动、政府采购服务和建设农村老年协会等路径推进农村养老。

黑龙江省因地制宜发展新质生产力的“三实”策略

发展新质生产力对于推进黑龙江省实现高质量发展意义重大。新质生产力概念源于马克思主义生产力理论,经中国特色社会主义经济实践得以创立并不断丰富发展,以满足新时代发展的需求。其内涵特征规定了新质生产力核心在于创新,关键在于质优,本质在于体现先进生产力。黑龙江省发展新质生产力有着自身生产力要素的优劣势。据此,提出“三实”策略——实践创新、实体升级和实效监管,旨在为黑龙江省因地制宜发展新质生产力提供策略参考。

四川少数民族活态文学英译:现状与反思

四川少数民族活态文学英译是中国文学“走出去”的重要组成部分。四川少数民族活态文学英译分布不平衡性,译本选择较为拘窄,英译模式与策略较为单一。针对四川少数民族活态文学英译现状,结合民族活态文学的民族性、流变性、表演型和即兴性等特征,提出以下几点:加强战略规划,改善生态平衡;完善翻译模式,提高翻译质量;调整翻译策略,再现口传特质。四川少数民族活态文学英译研究不但能促进我国民族活态文学翻译的学理研究,对提高我国民族文学与文化的传播力和影响力也大有裨益。

广东省植被生态质量演变与气象条件贡献分析

植被生态质量体现了植被的生产功能、多样性和服务功能,其变化受气象条件和人类活动的共同影响,科学地评估植被变化的气象条件贡献率对区域生态修复和应对气候变化具有重要的意义。以广东省为例,基于中国气象局发布的NDVI、FVC、NPP和气象条件贡献率等数据,运用统计分析与空间分析方法,探讨了广东省植被生态质量的时空分布特征,并定量评估了气象条件对广东植被变化的贡献。结果表明:1)2001-2022年,广东省的NDVI、FVC和NPP均呈波动上升变化,三者的年平均变化范围分别为0.494-0.627、0.594-0.706和C 831-1.15×103 g∙m^(-2),多年平均值分别为0.565、0.653和C 976 g∙m^(-2),峰值分别出现于2016年(NPP)、2021年(NDVI)、2022年(FVC),谷值出现于2005年(NDVI、FVC)和2003年(NPP);2)空间上,广东省植被生态质量存在明显的区域差异,表现为粤北>粤东北>粤西>粤东>珠三角,其中阳江、肇庆、云浮、清远、韶关等城市植被生态质量较好,东莞、佛山较差;3)近20多年来气象条件对广东省植被生态质量变化的影响以正贡献为主,气象条件贡献率整体以-1.60×10^(-2)/a的变化率呈波动下降趋势,气象条件对广东植被变化的影响总体变小;4)气象条件对粤北植被的影响以正向驱动为主,对粤东、粤西以负向驱动为主且对粤东的影响程度大于粤西,其中2007、2017-2018、2020-2022年气象条件对广东植被生态质量变化影响以负贡献为主,2022年呈高度负贡献。气象因素对广东植被生态质量变化的影响较大且存在明显的区域差异,在气象条件相对稳定的情况下,植被长势明显变好。