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| 1 | Effects of environmental contaminants on fertility and reproductive health显示文摘Recent research indicates that the human infertility rate is increasing. Although various reasons have been hypothesized for the growing infertility rate, environmental contaminants are potentially important causal agents associated with this change.Chemical contaminants are widespread throughout our environment and human exposure is virtually unavoidable. The overall contribution of environmental exposure to infertility is unknown, but studies involving occupational exposure, together with results from animal experiments, suggest that environmental contaminants may adversely affect fertility. We reviewed the adverse effects of environmental exposure on fertility and related reproductive outcomes. Environmental contaminants covered in this review include heavy metals, organic solvents, pesticides and endocrine disrupting chemicals. It is hoped that this review will highlight the need for further research in this area. | Yanmin Ma Xin He Keyan Qi Tong Wang Yongchao Qi Lele Cui Fengbang Wang Maoyong Song | 2019 | Journal of Environmental Sciences2019，31，3： | 6 |
| 2 | GIS—A Tool to Change Traditional Way of Mineral Resources Appraisal显示文摘Because of the wide application of digital spatial information technology to geology, a large spatial database in geology, geophysics, geochemistry and remote sensing is constructed, resulting in a change in conditions, methods and targets of mineral resources appraisal (MRA). In this paper, the difference between the GIS base MRA and the traditional MRA is studied. | Xiao Keyan Zhang Xiaohua Chen Zhenghui Zhu Yusheng Song Guoyao Regional Mineral Potential Planning Division, Chinese Academy of Geology, Beijing 100037 | 2000 | Journal of Earth Science2000，19，2： | 2 |
| 3 | The Grade-Tonnage Model for China's Molybdenum Deposits显示文摘The authors have studied the statistical characteristics of China's molybdenum deposits to establish the grade-tonnage model based on the data updated to the end of 2010. The results showed that each type of China's molybdenum deposits complied with Lasky's law approximately and the characteristics of grade-tonnage model obey the lognormal distribution. However, there are poor correlations between grade and tonnage respectively. Ultimately, we aimed to fit the grade-tonnage model through the known distribution function, draw the cumulative probability curves, and evaluated undiscovered mineral resources of China's molybdenum deposits by means of Monte Carlo simulation integrated in MRAS. | WANG Zhong XIAO Keyan SONG Chuanzhong | 2012 | Acta Geologica Sinica(English Edition)2012，86，3： | 2 |
| 4 | The discussion about the partition of metallogenic belt and the demand of pointing out metallogenic prospect显示文摘 | ZHU Yusheng XIAO Keyan SONG Guoyao | 2000 | Chinese Geology2000，，6： | 1 |
| 5 | Emphasizing research on metallogenic regularities and improving benefit of evaluation显示文摘 | ZHU Yusheng XIAO Keyan SONG Guoyao | 2000 | Chinese Geology2000，，6： | 1 |
| 6 | Uncertainty Visualisation of a 3D Geological Geometry Model and Its Application in GIS-Based Mineral Resource Assessment:A Case Study in Huayuan District,Northwestern Hunan Province,China显示文摘This paper reports an application of uncertainty visualisation of a regional scale(1:50000)3 D geological geometry model to be involved in GIS-based 3 D mineral potential assessment of the Xiangxibei lead-zinc mineral concentration area in northwestern Hunan District,China.Three-dimensional(3 D)geological modelling is a process of interpretation that combines a set of input measurements in geometry.Today,technology has become a necessary part of GIS-based deep prospecting.However,issues of sparse data and imperfect understanding exist in the process so that there are several uncertainties in 3 D geological modelling.And these uncertainties are inevitably transmitted into the post-processing applications,such as model-based mineral resource assessment.Thus,in this paper,first,a big-data-based method was used to estimate the uncertainty of a 3 D geological model;second,a group of expectations of geological geometry uncertainty were calculated and integrated into ore-bearing stratoisohypse modelling,which is one of the major favourable parameters of assessment for Lead-Zinc(Pb-Zn)deep prospectivity mapping in northwestern Hunan;and finally,prospecting targets were improved. | Nan Li Cangbai Li Wenkai Chu Keyan Xiao Weihan Tao Xianglong Song Rui Cao Yang Xu Mingjing Fan | 2021 | Journal of Earth Science2021，32，2： | 1 |
| 7 | Injective objects of monomorphism categories显示文摘为一非循环发抖 Q 和有限维的代数学 A,我们星期一在 monomorphism 范畴给不能分解的 injective 目标的一种统一形式(Q,一) 并且证明那是星期一(Q,一) 有足够的 injective 目标。 | Keyan SONG Yuehui ZHANG | 2016 | Frontiers of Mathematics in China2016，11，2： | 0 |
| 8 | Categories of exact sequences with projective middle terms显示文摘Let A be a finite-dimensional algebra over an algebraically closed field k,E the category of all exact sequences in A-mod,MP(respectively,MI)the full subcategory of E consisting of those objects with projective(respectively,injective)middle terms.It is proved that MP(respectively,MI)is contravariantly finite(respectively,covariantly finite)in E.As an application,it is shown that MP=MI is functorially finite and has Auslander-Reiten sequences provided A is selfinjective. | SONG KeYan ZHANG YueHui | 2014 | Science China Mathematics2014，57，3： | 0 |
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