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Search Results: 1 - 10 of 321006 matches for " 刘晓辉 "
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高校财务决算信息挖掘实践探讨:以A高校为例
Empirical Exploration on Mining Information in Final Financial Report of Universities: The Case of University A
 [PDF]

, , 梁峰
Frontiers of International Accounting (FIA) , 2015, DOI: 10.12677/FIA.2015.42002
Abstract:
参考美国伊利诺伊大学财务决算分析思路,构建了我国高校财务决算信息挖掘指标框架。从多个维度对高校人员支出、行政与后勤运行支出、教学与学科建设支出信息进行挖掘。使用构建的统计指标对A高校展开了实证分析。旨在为我国高校财务决算信息挖掘提供分析工具,了解当前高校运行成本,助力高校提高财务管理水平。
Referencing the analyzing method of the final accounting report of University of Illinois, a statistical index framework suitable for China’s University to mine the information is put forward. Mining information from multi-dimensions including staffs cost, administration and operation cost, teach- ing services and disciplines construction expenditures. And we use the indexes to analyze financial information of University A empirically. The study aims at providing a tool to mine information in final accounting report from China’s University exploring the running cost of the universities, and assisting to improve the quality of financial management of the universities.
酚类聚合物在水相胶束中的酶促合成
,刘伟
功能高分子学报 , 1995,
Abstract: 本文报道辣根过氧化物酶在水相胶束中催化聚合取代酚类的研究。水相胶束中酶催化活力高,产物分子量均一;通过调节表面活笥剂和单体的浓度,可以有效地控制产物的分子量,从而建立了不同聚合度有机纳米材料酶促合成的新方法。产物具有较强的蓝紫色荧光及较好的耐热性能,是一种很有应用前景的蓝光材料。
新时期我国小康体育发展的基本思路

惠州学院学报 , 2013,
Abstract:
热塑性树脂胶合板板坯热压过程中影响温度变化的主要因素

- , 2018, DOI: 10.13360/j.issn.2096-1359.2018.02.006
Abstract: 以聚乙烯薄膜为胶黏剂、桉树单板为原料制作多层热塑性树脂胶合板,并对影响制作过程中板坯温度变化的主要因素进行研究,以便更好地控制产品质量,提高生产效率,减少能源消耗。研究结果表明:板坯含水率对热塑性树脂胶合板热压所需时间有显著影响,降低板坯的含水率,能明显缩短板坯热压至要求温度所需时间; 当板坯含水率较高时,通过提高热压温度能明显缩短热塑性树脂胶合板的热压时间,当板坯含水率较低时,对热压时间的缩短则不如板坯含水率较高时明显; 所使用的厚度0.08 mm以下的聚乙烯薄膜不会阻碍热量在板坯中的传递,对板坯温度的变化没有明显影响; 板坯从热压机推移至冷压机的过程中,板坯与外部环境接触,表面温度会快速下降,如果下降过大会使板材表层的胶合强度明显降低,因此在确定热压温度参数时,应考虑板坯从热压机推移至冷压机过程中可能产生的温度损耗,才能保证板材的强度。
In the manufacturing of thermoplastic resin plywood, the thermoplastic resin film in the mat must be heated to a temperature above its melting point during the hot-pressing process. It is required that the thermoplastic resin could be in the molten state, so that it could contact fully with the veneer surface. After that, the mat should be cooled to a temperature below the melting point during the cold-pressing process under a certain pressure, gluing the veneers together. It is different from the traditional wood-based panel adhesives, such as phenol formaldehyde resin and urea formaldehyde resin, that can be cured at various temperatures. Therefore, the control of mat temperature is crucial to ensure the bonding strength of the thermoplastic resin plywood. To control product quality, increase the production capacity, and reduce energy consumption, we studied the main factors affecting the mat temperature change in the production process of thermoplastic resin plywood made of polyethylene film and eucalyptus veneers. Results showed that the moisture content of mat had a significant influence on the time for heating mat to the required temperature. It would shorten the hot-pressing time obviously by reducing the moisture content of the mat. When the moisture content of the mat was high, the increase in hot-pressing temperature would significantly reduce the hot-pressing time, while the moisture content of the mat was low, the reduction in the hot-pressing time was not obvious. The polyethylene film would not affect the heat transfer and temperature change in the mat when the film thickness was lower than 0.08 mm. If the surface temperature of the mat decreased too fast during the hot-pressing to cold-pressing process, the bonding strength of the mat outer layer could decreased obviously. When designing the hot-pressing temperature, it was necessary to take into account the temperature loss that may occur during the hot-pressing to cold-pressing process according to the environmental conditions, to ensure the performance of the plywood
怠速和停机数据拟合的摩擦扭矩在线学习算法
Online Learning Algorithms of Diesel Engine Friction Torque Based on Data Fitting of Idle and Stop Process

,,,
- , 2016, DOI: 10.11784/tdxbz201411050
Abstract: 针对发动机摩擦扭矩因为磨损、老化等发生缓慢变化的问题,发展了一种基于怠速和停机工况数据拟合的 柴油机摩擦扭矩在线学习算法.建立了一种简化的摩擦扭矩模型;设计了怠速和停机工况摩擦扭矩观测算法,采用 噪声抑制能力强的最速跟踪微分器优化了停机阶段的摩擦扭矩估计;利用怠速和停机观测的摩擦扭矩实现了摩擦扭 矩模型的在线修正,并在柴油机电控单元(ECU)中成功实现.发动机台架试验结果表明,通过摩擦扭矩基础模型的 在线学习,更新后的摩擦扭矩与倒拖试验数据基本吻合,摩擦扭矩估计偏差为2~7,N?m.
The friction torque of the engine changes with the growth of service life of diesel engine.To solve this problem,an online learning algorithm of diesel friction torque based on data fitting of idle and stopping process was developed.A simplified model of friction torque was built as the basis of correction.The current state of friction torque was observed in idle and stopping process.The estimation of friction torque during stopping process was optimized by steepest tracking differentiator of high noise suppression ability.The online correction of the base model was realized using the data obtained in idle and stopping process in electronic control unit(ECU).Engine bench test proves that through this algorithm,friction torque of updated model and data from drag test are basically the same, and the deviation is about 2―7,N?m
黑河下游植被对调水的响应
,昌明
地理学报 , 2009, DOI: 10.11821/xb200907003
Abstract: 由于黑河下游来水量的减少,黑河下游绿洲面积急剧退化。为了改善黑河下游的生态环境问题,遏制绿洲进一步退化的趋势,国务院批复于2000年开始对黑河下游进行调水,通过9年调水,黑河下游水资源时空分布发生了很大变化。为了客观评价黑河下游植被对调水的响应,本文通过实地调查、遥感等手段,分析了黑河下游1995-2004年地下水埋深、典型植被、景观类型及东居延海在调水以来的变化情况。研究结果表明黑河下游生态环境对调水响应明显,下游生态环境向良好的方向转变。
基于水库调蓄的黄河干流水体交换周期的量化研究
昌明,
地理学报 , 2004, DOI: 10.11821/xb200401014
Abstract: 针对黄河流域存在的水危机,探讨水体交换周期的内涵和意义,分析水体蓄变情况下水体交换周期的变化特征,在此基础上建立基于水量调度和河段配水的黄河干流水体交换周期的量化模型,并计算了不同时间尺度下黄河水体交换周期。研究结果表明,水体交换周期可以从不同时间尺度上把握水资源的可更新能力,精确地确定区域水资源总量,指导水库的调蓄计划,为建立可持续利用的水资源供水系统及其管理提供科学依据。
应激人群健康状况及常规临床检测指标分析
,
中国公共卫生 , 2011, DOI: 10.11847/zgggws2011-27-06-50
Abstract: ?研究证实,应激能影响机体的免疫功能并能加剧心脑血管疾病、自身免疫病和肿瘤的发生[1].职业应激可以导致生理、心理以及行为的改变,可以导致心理疾病、消化系统疾病、肌肉骨骼疾病等[2].本研究以不同职业人群作为研究对象,通过心理量表、血清检测指标分析不同职业人群的健康状况.
大连开发区2005-2009年细菌性痢疾疫情分析
于新源,
中国公共卫生 , 2011, DOI: 10.11847/zgggws-2011-27-10-68
Abstract: ?细菌性痢疾(简称菌痢)是夏秋季常见的急性肠道传染病,由痢疾杆菌引起,以结肠化脓性炎症为主要病变。
黄河三门峡以下水资源供需分析
,昌明
人民黄河 , 2005,
Abstract: ?黄河三门峡以下河段高含沙水质,给下游水资源的开发利用带来极大的不便,造成水资源供需紧张.通过水库模拟调配,研究黄河三门峡以下流域在不同状况下水资源的供需形势.研究结果表明:①三门峡和小浪底两水库的运行,极大地改善了三门峡以下水资源的供需状况,但在来水较枯的年份,水资源供给仍然紧张;②小浪底水库采用多年泥沙调节的运用方式既保证了下游输沙生态用水、减少了泥沙的淤积,又提高了水资源的利用效率;③由黄河下游向外流域调水,可引用的水量既少又不稳定,因此在枯水期过多地引水只能加重黄河下游自身水资源的供需矛盾.
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