精密网印调频加网技术的应用

调频加网技术在20世纪90年代中期就得到了很多网印界人士的重视.确实,在阶调印刷方面,胶版、凹版和树脂版都已经突破150线的加网局限,而网版印刷一般的工业应用在100线左右,再高的话,龟纹效应和网线切割会在高光和暗调部分形成瓶颈.     

食品级曲拉干酪素工艺条件优化研究

由曲拉生产食品级干酪素,在溶解、脱脂、酸化等工艺中存在食品安全、变色和出品率低的问题.本研究使用Ca(OH)溶解曲拉,通过离心法、萃取法、脂肪酶解法不同方法脱脂,使用醋酸、乳酸进行酸析,采用正交试验进行对比实验.得出了用质量分数为1%的Ca(OH)溶液在45℃温度下溶解60 min,使用0.6 g·L～1脂肪酶在pH值为4.2,酶解温度39 qC,时间50 min酶解,乳酸酸析温度35℃,酸析乳酸稀释比16,终点pH值为4.6进行酸析,得到了理想的效果.     

猪油酯交换产物性质测定与分析

本实验对酯交换前后样品进行SFI和DSC测定分析,确定了本实验进行的酯交换过程是脂肪酸排布随机化的过程,并且随机化后产品物理性质得到改良,更适合用作起酥油。     

浅谈基层水利工程质量监督机构的工作创新

本文在分析基层水利工程建设质量管理现状以及所面临的新形势和新要求的基础上,讨论了基层水利工程质量监督机构在管理手段、工作方式、监督重点等方面的创新,以期提升基层水利工程质量监督机构工作实效,为保证水利工程建设质量提供强有力的保障。     

Effects of climate change and anthropogenic activities on runoff change of the Weihe River basin,Northwest China

The Weihe River has experienced a significant runoff decline in the past few decades, but the detailed and systematic analysis of different sub-regions of the Weihe River basin (WRB) for a long time is insufficient. Based on the data of five hydrological stations from 1957 to 2018, this study investigated the variation of annual runoff both in the whole Weihe River basin (WWRB) and its sub-regions: the upper, middle, and lower reaches of the Weihe River (URWR, MRWR, LRWR, respectively), the Jing River basin (JRB), and the Beiluo River basin (BLRB). Moreover, the contribution of climate change and anthropogenic activities on runoff change was quantified by double mass curve (DMC) and hydrological sensitivity analysis (HSA) methods. The results showed that runoff of the URWR, MRWR, JRB, BLRB, and WWRB showed significant downward trends, and with the change-point years of 1993, 1990, 1996, 1994, and 1993, respectively. Both results of DMC and HSA showed that anthropogenic activities were the main factors for runoff reduction. The contribution of human activities was largest in the JRB and BLRB, whereas lowest in the MRWR. Over the study period, land use has changed significantly in the basin, mainly manifested in the reduction of farmland, and the increase of construction land and grassland, indicating that intense anthropogenic activities have taken place. Moreover, the total water consumption of the WWRB increased evidently, which exacerbated the contradiction between supply and demand of water resources. The results of HSA showed that runoff was more sensitive to precipitation than to E_p. Precipitation reduced the runoff, while E_p increased runoff in the basin. The results of this study are helpful for understanding the regional hydrological situation in more detail, and can act as a reference for formulating reasonable water resources allocation schemes.     

轿车悬架弹簧热处理技术和设备

阐述了轿车悬架弹簧全自动热处理生产线的组成特点,如采用先进的螺杆输送方式,使细长的弹簧钢棒料能在炉内连续地进行少无氧化脱碳的加热和输送。棒料加热后被绕成弹簧,利用余热淬火,再经过自动的排列和组合,在链式炉内进行回火、冷却和均热。均热过程是解决弹簧产品应力松弛的一项重要举措。生产线实现了规模产量,使弹簧的质量稳定,成本大幅度地下降。     

受压小口径钢管原材料质量管理和控制

本文以嘉兴电厂样板工程为例，应用ISO9000系列标准总结了大型电站锅炉受压小口径钢管的质量管理和质量控制，使原材料的采购、入厂验收、入库保管、发放使用和生产制造全过程按质量管理有序运转。文中还叙述建立原材料质量管理网络和工人与管理者相结合的联合工作网络小组；运用连续改进正统波原理，激发人的潜能，改进质量管理，创造出一流实物质量的水平。     

漫湾大坝监测自动化系统改造实施及试运行情况

本文对大坝安全监测自动化改造的实施全过程（包括设计、设备和系统选型、土建施工、安装调试）做了叙述，结合漫湾工程介绍了实施经验，并对试运行情况做了简介。     

基于位移场混合模型的棉花滩大坝弹性模量反演分析

根据坝体及坝基的变形特性,对位移水压分量进行分离,建立大坝多测点位移场的混合模型,反演得到坝体及坝基的综合弹性模量,并根据此反演结果,利用结构分析法拟定坝顶水平位移的监控指标。以棉花滩大坝为例进行计算,采用结构分析法的拟定结果与采用实测资料小概率法的拟定结果非常接近,说明反演分析结果反映了工程实际情况。     

鄂东鸡冠嘴铜（铁）金矿床的地质特征及成因

本文通过对鸡冠嘴铜（铁）金矿床的地质特征及成矿机制的研究，认为该矿床明显受构造、地层和岩浆活动控制，在时空及成因上具有“一体多矿”、“一体多带”的成矿特点，为高、中温热液－接触交代矽卡岩型铜（铁）金矿床