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Ecodynamic models acounting for the changes in lake ecosystem

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Journal of Environmental Sciences 1997年第2期9卷 16-23页

作者： zhang yongze Huang Chuanyou Wang Xuan Department of Hydraulic Engineering Sichuan Union UniversityChengdu 610065China Zheng Binghui Chinese Research Academy of Environmental Science

Based on the basic ecological model proposed by Jorgensen and the species composition of lake ecosystem, a new approach to calculate the growth rate of phytoplankton weighted growth rate method was presented. The thermodynamic concept “Exergy” was also introduced into the ecodynamic model for lakes,and the changes in the species composition and the ecological structure of lake ecosystem were reflected by the changing *** improved ecodynamic model for lakes was developed by combining the weighted growth rate with the application of exergy. These improvements comprehensively take the ecological properties of lake ecosystems into account, making the ecodynamic model ecologically more reasonable and practically more flexible. The applications of the improved ecodynamic model in the ecological modelling and prediction of Dianchi Lake, have demonstrated that this model is practicable and satisfactory.

关键词： weighted growth rate exergy ecodynamic model.

China-made Rigs Enter International Market

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China Oil & Gas 2006年第2期13卷 40-43页

作者： zhang yongze Chen Liren Baoji Oilfield Machinery Co. Ltd. （BOMCO）

Nowadays, China＇s drilling equipment manufacturing has formed into a sophisticated industrial chain, playing an indispensable role in supporting China＇s petroleum industry. Especially in recent years, apart from satisfying the requirements of domestic onshore drilling operations, the state-of-the-art drilling equipments like offshore modular drilling rigs, 9000 meter ultra-deep rigs have also been successfully manufactured, this, together with the wholesale export of electric drilling rigs to the overseas market, has ranked China as a primary manufacturer of drilling equipments in the world. China can now wholesale produce series of onshore and offshore drilling equipment with rig production of nearly 200 per year. The production capacity accounts for 20%-25% of the world total. In addition to satisfying domestic market, China made onshore drilling rigs have also gained great competitive advantages in the international market.

关键词：中国钻进设备国际市场石油工业竞争优势

膨胀区域匹配和自适应轨迹管理策略的多目标跟踪方法

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武汉大学学报（信息科学版） 2024年第4期49卷 572-581,594页

作者：张永泽达飞鹏东南大学自动化学院江苏南京210018 东南大学复杂工程系统测量与控制教育部重点实验室江苏南京210018 江苏电力信息技术有限公司江苏南京210018

针对由于目标频繁遮挡、不规则运动导致的外观特征不可靠和运动特征难以获取的问题,提出一种基于膨胀交并比区域(dilatation intersection over union,DIOU)匹配和自适应轨迹管理策略的多目标跟踪算法。DIOU模块通过膨胀匹配区域,提升... 详细信息

针对由于目标频繁遮挡、不规则运动导致的外观特征不可靠和运动特征难以获取的问题,提出一种基于膨胀交并比区域(dilatation intersection over union,DIOU)匹配和自适应轨迹管理策略的多目标跟踪算法。DIOU模块通过膨胀匹配区域,提升轨迹级联匹配的精度。自适应轨迹管理策略利用目标检测置信度动态调整轨迹生命周期,显著减少了异常跟踪和身份跳变。在公开数据集MOT17、MOT20和DanceTrack上进行了验证与测试,其在测试集上的高阶跟踪精度平均提升了2.4%,实验结果证明了所提方法的有效性。

关键词：计算机视觉多目标跟踪不规则运动数据关联轨迹管理

Low temperature leads to the increase of the activities of glutamine synthetase, isocitrate dehydrogenase, and the level of proline in rice (Oryza sativa L.) roots

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Low temperature leads to the increase of the activities of g...

新时期高校教师思想政治工作的主要任务、共性问题及对策研究

湖北省暨武汉市生物化学与分子生物学学会第七届第十四次学术年会

作者： Binbin Lu, yongze Yuan, Chufu zhang

Many factors, including exogenous carbon motabolites influence the expression of enzymes involved in ammonium assimilation, but little is known on nitrogen metabolism under low temperature stress. To investigate the effects of low temperature stress on nitrogen metabolism, the rice (Oryza sative L.) seedlings grown at the optimal temperature (30℃) were subjected to low temperature (20℃), and expression of several key enzymes involved in ammonium assimilation, including Glutamine syntbetase (GS;EC 6.***.1.2), NADP-dependent isocitrate dehydrogenase (NADP-ICDH;EC 1.***.1.42), and NAD(H)-dependent glutamate dehydrogenase (GDH;EC 1.***.1.2) from rice roots was assessed. It was found that with the induction of low temperature, GS and ICDH activities were increased by 80% and 75%, respectively. A positively parallel correlation was observed between the two key enzymes. Native-PAGE analysis, together with activity staining and western blot assays, showed that both GSrb activity and GSrb protein level were enhanced under low temperature. On the other hand, NADH-GDH and NAD-GDH activity were both reduced under the same conditions, though to different extent. Several physiological parameters, including biomass, NH, pH, and proline, were measured as well. At low temperature, ammonium absorption was stimulated by the elevation of GS activity. Proline content was positively linked with the increase of GS and ICDH: low temperature led to the marked accumulation of proline in rice roots (about 1.2-fold induction). The key enzymes in the rice roots with sucrose feeding showed the same behavior as those under low temperature, indicating that at least partially low temperature has the similar effect as carbon compound on the modulation of nitrogen metabolism. Our results also suggest that 2- oxoglutarate (OG), cooperating with ammonium and its derived amino acids, can regulate the co-ordination of C and N metabolism. This study represents an important contribution toward a better understan

关键词： Key Laboratory of MOE for Plant Developmental Biology College of Life Sciences Wuhan University 430072

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云南行政学院学报 2020年第3期22卷 88-93页

作者：张永泽中共中国药科大学党委教师工作部江苏南京211198

对不同历史阶段高校教师思想政治工作的主要任务进行梳理,明晰了新时期高校教师思想政治工作的主要任务。分析当前高校教师思想政治工作存在的共性的问题,并对形成这些问题的原因进行审视。最后认为:强化党委教师工作部职能,完善工作体... 详细信息

对不同历史阶段高校教师思想政治工作的主要任务进行梳理,明晰了新时期高校教师思想政治工作的主要任务。分析当前高校教师思想政治工作存在的共性的问题,并对形成这些问题的原因进行审视。最后认为:强化党委教师工作部职能,完善工作体系;强化协同联动制度,顺畅工作机制;追求润物无声实效,树立“浸润式”工作理念;构建思政与业务“双螺旋”模式,创新工作方法是解决这些问题的有效路径。

关键词：高校教师思想政治工作任务问题成因对策

流动变压器油中气泡动力学行为及电场分布仿真

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高电压技术 2020年第6期46卷 2004-2012页

作者：张永泽唐炬潘成骆欣瑜重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400044 西安西电变压器有限责任公司西安710077 武汉大学电气与自动化学院武汉430072

气泡作为变压器油中的典型绝缘缺陷,极易诱发局部放电。为了弄清流动变压器油中气泡动力学行为及其对电场畸变的影响,基于有限元方法构建了气液两相流模型,仿真研究了油流速度对水平油道和垂直油道中气泡运动轨迹和变形的影响。结果表明... 详细信息

气泡作为变压器油中的典型绝缘缺陷,极易诱发局部放电。为了弄清流动变压器油中气泡动力学行为及其对电场畸变的影响,基于有限元方法构建了气液两相流模型,仿真研究了油流速度对水平油道和垂直油道中气泡运动轨迹和变形的影响。结果表明,工频电场中气泡形状以100 Hz的频率周期性振动。在水平油道中,随着油流速的增加,气泡沿竖直方向的变形增大,由气泡导致的电场畸变减弱;在垂直油道中,随着油流速的增加,气泡沿水平方向的变形减弱,电场畸变增强。为了验证仿真模型的有效性,搭建了水平油道变压器油循环装置及气泡运动观测系统,拍摄了水平油道中气泡的运动和变形图像,发现气泡以100 Hz频率周期性振动,并提取了不同流速下气泡的形变率,实验结果与仿真结果基本相符。

关键词：气泡变形气液两相流油流速度变压器油

温度对流动变压器油中悬移气泡局部放电特性的影响与作用机制

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电工技术学报 2020年第6期35卷 1357-1367页

作者：张永泽唐炬潘成骆欣瑜输配电装备及系统安全与新技术国家重点实验室(重庆大学) 重庆400030 武汉大学电气与自动化学院武汉430072

悬移气泡作为变压器油中的典型绝缘缺陷,它的存在极易引起局部放电(PD)。为了探究温度对流动状态下变压器油中悬移气泡PD特性的影响,搭建流动变压器油实验平台,开展大量不同温度条件下的PD实验,提取放电脉冲波形、放电相位、放电重复率... 详细信息

悬移气泡作为变压器油中的典型绝缘缺陷,它的存在极易引起局部放电(PD)。为了探究温度对流动状态下变压器油中悬移气泡PD特性的影响,搭建流动变压器油实验平台,开展大量不同温度条件下的PD实验,提取放电脉冲波形、放电相位、放电重复率和视在放电量等参数。结果表明:温度从40℃增加到80℃,放电重复率先迅速减小后略有增加,而平均视在放电量始终呈下降趋势;温度对放电脉冲波形没有明显的影响;不同温度下,放电相位均主要分布在工频负半周,且发生在270°位置的PD数量最多。进一步结合不同温度下悬移气泡的变形、融合以及电场畸变仿真,探讨了温度对悬移气泡PD特性的影响机制。

关键词：温度局部放电悬移气泡流动变压器油

直流均匀电场下流动变压器油中金属微粒运动行为研究

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高电压技术 2020年第3期46卷 824-831页

作者：骆欣瑜唐炬潘成张永泽重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400030 武汉大学电气与自动化学院武汉430072

含金属微粒污染物变压器油的局部放电(partial discharge,PD)特性取决于微粒的运动行为。为了研究流动变压器油中金属微粒运动特性,在深入分析微粒受力的基础上,构建了基于层流状态的固–液两相流模型,仿真了直流均匀电场中不同油流速... 详细信息

含金属微粒污染物变压器油的局部放电(partial discharge,PD)特性取决于微粒的运动行为。为了研究流动变压器油中金属微粒运动特性,在深入分析微粒受力的基础上,构建了基于层流状态的固–液两相流模型,仿真了直流均匀电场中不同油流速度下微粒的运动轨迹。为验证模型的正确性,搭建了金属微粒运动观测平台,获得了不同流速下平行板电极之间微粒的真实运动轨迹。实验结果与仿真结果相一致,二者均表明微粒在水平方向随着油流运动的同时,在竖直方向上下往复运动并与电极发生碰撞。此外,随着油流速率增加,微粒沉降过程所需的水平移动距离变长,相邻2次碰撞间的水平移动距离增加,导致了微粒与电极之间总的碰撞次数将减少。这解释了PD次数随油流速度减少的原因。

关键词：变压器油流动金属微粒两相流运动轨迹局部放电

Development and challenges of professional Master of pharmacy education in China

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Journal of Chinese Pharmaceutical Sciences 2021年第1期30卷 69-76页

作者： Jie Gu Yanli Liu Fengguo Xu yongze zhang Rong Shao Tao Lu Graduate School China Pharmaceutical UniversityNanjingJiangsu 211198China Secretariat of National Steering Committee of Pharmacy Graduate Education NanjingJiangsu 211198China Marxist College China Pharmaceutical UniversityNanjingJiangsu 211198China School of International Pharmaceutical Business China Pharmaceutical UniversityNanjingJiangsu 211198China

In the present work,we aimed to describe the current situation and developing trend of professional Master of pharmacy education in *** searches of websites for literatures related to the specialty of professional Master of pharmacy were conducted.E-mail or telephone inquires were made directly to 108 pharmacy institutions(schools and universities)in China offering the MPharm *** MPharm program was established in China in 2010,which primarily focuses on cultivating professionals in fields,such as drug technology transformation,inspection and regulation of drugs,registration and distribution of drugs,and pharmaceutical *** 9 years of development,it has almost completed the overall design of its higher education paradigm with Chinese *** the rapid development of the pharmaceutical industry in China,the professional degree of pharmacy education program at the master’s level is insufficient to meet social and market demand for qualified ***,doctoral-level programs are now being promoted.

关键词： China Pharmacy education Professional Master of Pharmacy Chinese graduate program