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International Journal of Biomathematics 2016年第4期9卷 1-14页

作者： Cuicui Liao xiaohua ding Jiuzhen Liang Department of Information and Computing Science Jiangnan University No. 1800 Lihu Avenue Wuxi Jiangsu 214122 P. R. China Department of Mathematics Harbin Institute of Technology at Weihai No. 2 Wenhua West Road Weihai Shandong 264209 P. R. China Department of Internet of ThingsJiangnan University No. 1800 Lihu Avenue Wuxi Jiangsu 214122 P. R. China

We propose an efficient numerical method for two population models, based on the nonstandard finite difference （NSFD） schemes and composition methods with complex time steps. The NSFD scheme is able to give positive numerical solutions that satisfy the conservation law, which is a key property for biological population models. The accuracy is improved by using the composition methods with complex time steps. Numerical tests on the plankton nutrient model and whooping cough model are presented to show the efficiency and advantage of the proposed numerical method.

关键词： Nonstandard finite difference schemes composition methods with complextime steps population models positive numerical solutions conservation laws.

Comparative study of mining methods for reserves beneath end slope in flat surface mines with ultra-thick coal seams

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International Journal of Mining Science and Technology 2017年第6期27卷 1065-1071页

作者： Zha Zhengao Ma Li Li Kemin ding xiaohua Xiao Shuangshuang School of Mines China University of Mining and Technology Xuzhou 221116 China School of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China State Key Laboratory for Geomechanics & Deep Underground Engineering China University of Mining and Technology Xuzhou 221116 China

The paper aims to identify a reasonable method for mining ultra-thick coal seams in an end-slope in surface mine, With a case study of Heidaigou surface coal mine(HSCM), the paper conducted a comparative research on three mining methods, namely Underground Mining Method(UMM), Highwall Mining System(HMS) and Local Steep Slope Mining Method(LSSMM). A model was firstly established to simulate the impact that UMM and HMS exert on monitoring points and surface deformation. The way that stripping and excavation amount varies with different slope angle, and the corresponding end slope stability were analyzed in the mode of LSSMM. Then a TOPSIS model was established by taking into account six indicators such as recovery ratio, technical complexity and adaptability, the impact on surface mining production, production safety and economic benefits. Finally, LSSMM was determined as the best mining method for mining ultra-thick coal seams in end slope in HSCM.

关键词： Ultra-thick coal seam End wall in surface mine Highwall Mining System Local steep slope Resource exploitation

An evaluation of sea surface height assimilation using along-track and gridded products based on the Regional Ocean Modeling System(ROMS) and the four-dimensional variational data assimilation

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Acta Oceanologica Sinica 2018年第9期37卷 50-58页

作者： ZHOU Chaojie ding xiaohua ZHANG Jie YANG Jungang MA Qiang Department of Mathematics Harbin Institute of Technology at Weihai The First Institute of Oceanography State Oceanic Administration

Remote sensing products are significant in the data assimilation of an ocean model. Considering the resolution and space coverage of different remote sensing data, two types of sea surface height（SSH） product are employed in the assimilation, including the gridded products from AVISO and the original along-track observations used in the generation. To explore their impact on the assimilation results, an experiment focus on the South China Sea（SCS） is conducted based on the Regional Ocean Modeling System（ROMS） and the four-dimensional variational data assimilation（4 DVAR） technology. The comparison with EN4 data set and Argo profile indicates that, the along-track SSH assimilation result presents to be more accurate than the gridded SSH assimilation, because some noises may have been introduced in the merging process. Moreover, the mesoscale eddy detection capability of the assimilation results is analyzed by a vector geometry–based algorithm. It is verified that, the assimilation of the gridded SSH shows superiority in describing the eddy＇s characteristics, since the complete structure of the ocean surface has been reconstructed by the original data merging.

关键词： ROMS 4DVAR sea surface height assimilation along-track gridded product

Fine mapping of locus S-b for F_1 pollen sterility in rice (Oryza sativa L.)

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Chinese Science Bulletin 2006年第6期51卷 675-680页

作者： LI Wentao ZENG Ruizhen ZHANG Zemin ding xiaohua ZHANG Guiquan Guangdong Provincial Key Lab of Plant Molecular Breeding SouthChina Agricultural University Guangzhou 510642 China

Hybrid sterility is the main barrier in util-izing the heterosis of subspecies in rice. A knowledge of the underlying molecular mechanism of the hybrid sterility will be useful for overcoming the barrier. In this research, the F1 pollen sterility locus, S-b, was mapped between SSR markers PSM8 and PSM202. To fine map the locus, one F2 mapping population of 3910 plants was developed using the near-isogenic lines of the locus. Ninety-seven recombinants be-tween two markers were selected. Moreover, a series of markers, including two SSR markers, two InDel markers and four CAPS markers, were developed on the region. Linkage analysis showed that marker W4 was co-segregated with locus S-b, while makers A8 and A14 were located on the two sides of the locus with a distance of 0.026 and 0.038 cM, respectively. The markers were then integrated with the se-quences of the clones of the region. Results showed that all the polymorphic markers were anchored on the three end-to-end jointed clones AC093089, AC079021 and AC134931. According to the physical information of the markers, locus S-b was finally de-limited to a region of 27 kb between A8 and A14. Seven ORFs were identified on the region based on the annotation results of RiceGAAS system. These results laid the foundation for further cloning the gene.

关键词：水稻杂种不育性分子标记杂交第一代花粉不育性

Geopolymer-based modification of blasting sealing materials and optimization of blasting block size in coal seams of open pit mines

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International Journal of Mining Science and Technology 2023年第12期33卷 1551-1562页

作者： xiaohua ding Zhongchen Ao Wei Zhou Hao Qin Zhongao Yang Wen An Xiaoshuang Li Honglin Liu School of Mines China University of Mining and TechnologyXuzhou 221116China High Tech Research Center for Open Pit Mines China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China College of Environmental Science and Engineering Liaoning Technical UniversityFuxin 123000China Wuhan Marine Machinery Plant Co.Ltd Wuhan 430010China School of Civil Engineering Shaoxing University of Arts and SciencesShaoxing 312010China School of Geology and Mining Engineering Xinjiang UniversityUrumqi 830046China

This research proposes the utilization of a geopolymer-based blasting sealing material to improve the profitability of coal sales and reduce the rate of coal fragmentation during blasting in open pit *** study first focused on optimizing the strength of the sealant material and reducing curing *** was achieved by regulating the slag doping and sodium silicate solution *** findings demonstrated that increasing slag content and improving the material resulted in an early rise in strength while increasing the modulus of the sodium silicate solution extended the curing *** slag doping level was fixed at 80 g,and the sodium silicate solution modulus was set at *** achieve a strength of 3.12 MPa,the water/gel ratio was set at *** initial setting time was determined to be 33 min,meeting the required field test ***,the strength requirements for field implementation were assessed by simulating the action time and force destruction process of the sealing material during blasting using ANSYS/LS-DYNA *** results indicated that the modified material meets these ***,the Shengli Open Pit Coal Mine served as the site for the field *** was observed that the hole-sealing material’s hydration reaction created a laminated and flocculated gel inside *** enhanced the density of the modified ***,the pregelatinized starch,functioning as an organic binder,filled the gaps between the gels,enhancing the cohesion and bonding coefficient of the *** analyzing the post-blasting shooting effect diagram using the Split-Desktop software,it was determined that the utilization of the modified blast hole plugging material resulted in a decrease in the rate of coal fragmentation from 33.2%to 21.1%.This reduction exhibited a minimal error of 1.63%when compared to the field measurement,thereby providing further confirmation of the exceptional plugging capabilities of the modified *** study

关键词： Open pit coal mine Coal seam blasting Sealing materials Block size optimization Numerical simulation

A Modest Study on Ba Culture and Architecture

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Contemporary Social Sciences 2017年第2期2卷 80-88页

作者： Xiang Yixian ding xiaohua Sichuan University

Ba people are inherently different from Shu people,but they are also complementary to each *** people are represented to have rough masculine qualities,while Shu people are distinctly described as gentle and graceful,entirely different from the vigorous *** initial buildings of the Ba people were rock pits slightly reorganized in virtue of convenient geographical conditions,which are regarded as the earliest life pattern of the Ba *** long study and progress,Ba people ultimately came out of wild pits,and perfected the dry column buildings by creating stilted buildings,which bring both security and *** Ba people found the subtlest equilibrium point between utility and aesthetics,achieving a true harmony between human beings and nature.

关键词： Ba culture Ba people architecture

Development of Chinese Cultural Governance since the Reform and Opening-up

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Contemporary Social Sciences 2017年第1期2卷 54-67页

作者： Liu Yanwu ding xiaohua Sichuan Provincial Party School

Contemporary Chinese cultural governance is an important part of the national governance system and the modernization of national governance capacity. It must combine international experience and local method together and run through the whole process of cultural system reform. The good governance of culture is the goal pursued by Chinese cultural governance, which displays the management process of maximizing cultural public interest. In the new era, cultural governance reform has experienced governance subject centralized to pluralism, governance space from inside to outside, governance method from ruling by man to the rule of law, governance path from control-oriented government to service-oriented government. To further improve Chinese cultural governance in the new era, relationships between top-level design and grass-root innovation, cultural democracy and cultural concentration, national cultural interests, social cultural interests and cultural interests of the citizens, domestic cultural governance and global culture must be dialectically dealt with. In the government-market-social governance structure, mutual assistance of multiple missions and win-win of multiple subjects can be achieved, thus promoting harmony of multiple interests.

关键词： Cultural governance modernization of governance capacity good governance of culture service-oriented government

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基于多目标规划的抛掷爆破台阶参数优化

煤炭学报 2018年第9期43卷 2422-2431页

作者：肖双双马力丁小华西安科技大学能源学院陕西西安710054 中国矿业大学矿业工程学院江苏徐州221116

为了优化确定抛掷爆破台阶参数,采用回归分析等方法,构建了抛掷爆破台阶参数与采剥费用之间的关系模型,并从地质资源条件、设备线性尺寸、生产作业条件等方面提出了抛掷爆破台阶参数的约束条件,建立了抛掷爆破台阶参数多目标优化模型,... 详细信息

为了优化确定抛掷爆破台阶参数,采用回归分析等方法,构建了抛掷爆破台阶参数与采剥费用之间的关系模型,并从地质资源条件、设备线性尺寸、生产作业条件等方面提出了抛掷爆破台阶参数的约束条件,建立了抛掷爆破台阶参数多目标优化模型,提出了基于带精英策略的非支配排序遗传算法(NSGA-Ⅱ)的多目标优化模型求解方法。通过工程实例计算,得出以下结论:黑岱沟抛掷爆破台阶最优工作线长度为2 200 m,台阶高度为38 m,采掘带宽度为84 m,台阶坡面角为65°。在不考虑其他因素的影响下,露天矿采剥总费用随着工作线长度的增大先减小后增大,随着台阶高度的增大而减小。采掘带宽度在60～90 m范围内变化时,采剥总费用随着采掘带宽度的增大先降低后增大。露天矿采剥总费用随着台阶坡面角的增大而降低,但台阶坡面角对台阶稳定性影响较大,而台阶高度对采剥总费用的影响较大,相同稳定系数的情况下,取较小的台阶坡面角、较大的台阶高度时采剥总费用较小。

关键词：抛掷爆破台阶参数多目标规划 NSGA-II

解随机森林发展方程的半隐式欧拉法的收敛性(英文)

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黑龙江大学自然科学学报 2008年第6期25卷 719-730页

作者：丁效华马强哈尔滨工业大学(威海)数学系

一般来说,大多数随机偏微分方程并不存在显式解,因此,数值方法是研究这类方程解的性质的十分有效的工具。应用半隐式欧拉方法求解一类随机森林发展方程,从而得到其近似解,并证明了当满足一些比线性增长条件和全局利普希茨条件弱的条件时... 详细信息

一般来说,大多数随机偏微分方程并不存在显式解,因此,数值方法是研究这类方程解的性质的十分有效的工具。应用半隐式欧拉方法求解一类随机森林发展方程,从而得到其近似解,并证明了当满足一些比线性增长条件和全局利普希茨条件弱的条件时,半隐式欧拉格式将依概率收敛于方程的解析解,其收敛阶为p=12.

关键词：随机森林发展方程半隐式欧拉方法依概率收敛李雅普偌夫函数

《民法典》与环境民事公益诉讼赔偿范围的扩张与完善

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法律适用 2020年第23期 92-100页

作者：丁晓华上海市第三中级人民法院

环境民事公益诉讼获得立法确认以来,不断通过司法解释明确审理规则与相关程序,并扩张赔偿范围。《民法典》吸收了环境公益诉讼司法实践的发展成果,将司法解释规定的公益赔偿范围上升为法律条文,并另行增补惩罚性赔偿,构建了环境污染和... 详细信息

环境民事公益诉讼获得立法确认以来,不断通过司法解释明确审理规则与相关程序,并扩张赔偿范围。《民法典》吸收了环境公益诉讼司法实践的发展成果,将司法解释规定的公益赔偿范围上升为法律条文,并另行增补惩罚性赔偿,构建了环境污染和生态破坏领域完整的侵权责任体系与损害赔偿制度。但在《民法典》模式下,仍需合理定位及区分环境私益与公益诉讼的赔偿范围,整合及更新涉环境公益诉讼的司法解释,继续完善环境公益诉讼的赔偿范围,促进环境公益赔偿制度对我国生态文明建设的引领作用。

关键词：环境公益诉讼侵权责任生态损害赔偿惩罚性赔偿