有色金属矿山工程技术项目尾款催收管理研究

依托实践经验和教训，从业务角度分析研究有色金属矿山工程技术项目尾款拖欠的形成机理和催收要点，全寿命周期探讨该类经营管理问题的解决途径，结合业务、财务、法务专业知识，提出一系列有深度可借鉴的见解及措施,如：1）催收工作要注意客户性质、客户经营情况、客户人员变化、项目完成瑕疵、乙方管理特征等具体情况采用不同的催收沟通办法；2）建议利用奖惩激励、诉前保全、信用保险、商业保理等工具达到催收或出表目的；3）提醒进行财产损失处理来结束确认不能回收项目的内部管理流程；4）提议利用履约担保、质量担保、客户分级管理等措施来控制回款风险。     

A Minimalist Single-Layer Metasurface for Arbitrary and Full Control of Vector Vortex Beams

Vector vortex beams (VVBs) possess ubiquitous applications from particle trapping to quantum information. Recently, the bulky optical devices for generating VVBs have been miniaturized by using metasurfaces. Nevertheless, it is quite challenging for the metasurface-generated VVBs to possess arbitrary polarization and phase distributions. More critical is that the VVBs' annular intensity profiles demonstrated hitherto are dependent on topological charges and are hence not perfect, posing difficulties in spatially shared co-propagation of multiple vortex beams. Here, a single-layer metasurface to address all those aforementioned challenges in one go is proposed, which consists of two identical crystal-silicon nanoblocks with varying positions and rotation angles (i.e., four geometric parameters throughout). Those four geometric parameters are found to be adequate for independent and arbitrary control of the amplitude, phase, and polarization of light. Perfect VVBs with arbitrary polarization and phase distributions are successfully generated, and the constant intensity profiles independent of their topological charges and polarization orders are demonstrated. The proposed strategy casts a distinct perception that a minimalist design of just one single-layer metasurface can empower such robust and versatile control of VVBs. That provides promising opportunities for generating more complex vortex field for advanced applications in structural light, optical micromanipulation, and data communication.     

The Effect of Editing Open-Ended Text Responses on Nutrient and Food Group Estimates from the Automated Self-Administered 24-Hour Dietary Recall (ASA24)

The National Cancer Institute (NCI) Food Reporting and Comparison Study (FORCS) compares nutrient and food group estimates obtained from recalls collected through the web-based Automated Self-Administered 24-hour Recall (ASA24) to those from standard interviewer-administered telephone recalls among 1054 adults. Within the ASA24 software, respondents may choose to enter open-ended text to report “unfound food” and “other, specify.” Respondents use the“unfound food” field to report a food or drink they cannot find; the ASA24 system then asks a series of general questions to better identify the food. Respondents use the “other, specify” field to provide food details, such as brand name or cooking method, that differ from the responses offered by ASA24. When respondents use these two open-ended text fields, the system assigns default food codes. Nutritionists reviewed these codes and assigned new codes when appropriate. Nutrient and My Pyramid Equivalent (MPE) values from default food codes (unedited) andthe researcher assigned food codes (edited)were compared. Of the 716 food codes evaluated, changes were made to 248 foods (1.5% of total foods reported) which affected 194 (19.1%) of all recalls and required over 60 hours of specialized staff time. Although 43% of the 1013 completed recalls included at least one of the two text field responses, the ASA24 systemassigned acceptable default food codes 68% of the time.Editing did not significantly affect the means and ranking for most nutrients and food group MPE values; correlation coefficients for energy and macronutrient values before and after editing were 0.95 or higher, suggesting that this editingmaynot be necessary for most large studies using ASA24.     

制药企业在2010版药品GMP实施过程中召回管理现状与常见问题分析

总结制药企业在2010版药品GMP实施过程中召回管理的现状,并分析存在问题,包括对产品召回持消极态度,召回管理方面培训不到位,操作规程缺乏可操作性,有效性评估不足等。建议制药企业必须重视产品召回的管理,严格按照2010版药品GMP的要求积极建立召回系统。     

理想弹塑性厚壁圆筒弹塑性应力场再研究

对理想弹塑性厚壁圆筒受内外均布压力问题重新进行了研究，指出了现行应力场解答中存在的问题及产生这些问题的根源，并进一步求出了该问题的准确解答。     

浅谈构建水利与经济社会和谐发展的双赢平台

指出人水和谐不仅是一种理念也是一种方法,要利用这种理念,从经济学、社会学、生态学和系统学等不同研究方向来研究可持续发展理论,并应在治水中坚持人与自然和谐相处的观念,反映出价值取向的变化,从而由“以人为中心”和人控制自然、统治自然的价值理念,转变为以人为本、全面、协调、可持续发展的理念,最终达到人与自然和谐发展、共同发展。     

运用模糊数学结合层次分析法评价房屋完损等级

根据现有房屋完损等级评价标准，提出运用模糊数学的多级评判方法分层次确定房屋完损等级的隶属度，结合层次分析法(AHP)确定各个评价层次对于上一评价层次的权重综合评价房屋完损等级，使评价结果更加科学、合理。最后，给出算例证明此方法在实际中是可行的。     

奇周期最佳几乎二进序列偶理论研究

提出了一种新的具有良好奇周期相关特性的最佳离散信号——奇周期最佳几乎二进序列偶。奇周期最佳几乎二进序列偶中2个序列中均有一个元素为 “0”元素,其他元素取值均为“＋1”或“－1”,并且其奇周期自相关函数为单值脉冲函数。同时研究了奇周期最佳几乎二进序列偶的变换性质和频谱特性,给出了一些组合允许条件。研究结果表明,奇周期最佳几乎二进序列偶扩大了奇周期最佳几乎二进序列的存在空间,且为奇周期最佳几乎二进序列偶中2个序列相同时的特殊情况。     

为推行清单计价模式建立完善的地方造价信息网

文章探讨了工程量清单计价模式下信息技术对工程量清单计价体系的影响,提出了建立完善的地方造价信息网的途径。     

申报制造许可的几项建议

根据制造许可规则与型式试验细则规定，以及当前部分制造企业尚存在差距，提出从设计、文件、自检等方面贯彻电梯相关标准与加强质量控制的建设，以利达到顺利申报制造许可的目的。