儿童玩具服装食品相关安全标准

玩具主要成分及材质1、含有填充物的玩具产品上应标明主要成分及材质,是让消费者了解产品所用材料的真实情况,以保护儿童的身体健康。如文字显示：全部使用安全材料、全部采用新材料、填充物采用100％聚酯纤维等。2、木质玩具应无虫蛀,表面光滑,不至损害儿童皮肤。年龄范围年龄范围的标注是指导消费者选购玩具时作为参考,也是保证儿童安全使用的重要内容,应在产品的包装上及说明书或标签上标明,如适合6个月以上,适合18个月以上,适合3岁以上,不适合3岁以下等。     

为儿童玩具把脉

玩具是儿童的天使。改革开放到今天,人们在感叹玩具市场琳琅满目,商家狂卖、顾客热买的同时,也产生了些许忧虑。     

选购儿童玩具有『三忌』

一年一度的“六一”儿童节即将来临，儿童用品消费正值消费旺季，这个时候，许多孩子都会收到自己父母及长辈准备的节日礼物一一儿童玩具。如何正确选购儿童玩具，既让孩子玩得高兴，又能保证安全、放心，成了不少孩子家长眼下最为关心的问题。专家提醒广大家长，在选购儿童玩具时安全、环保最重要。     

儿童玩具还存在哪些安全质量隐患

日前，国家质检总局对儿童玩具产品质量进行了国家监督抽查。其中，毛绒、布制类玩具合格率较高，为95．6％；塑料、木制与其他类玩具合格率较低．为76．7％。本次抽查发现的主要质量问题有：     

儿童玩具质量安全--难以释怀的隐痛

儿童是祖国的未来,民族的希望,儿童的健康成长与社会的进步及发展息息相关,关注儿童健康是全社会的共识.儿童玩具伴随着每一位孩子度过快乐的童年,"忆往昔,童趣无限,欢乐开怀,玩具相伴,其乐融融."相信这是很多人有过的难以忘却的儿时记忆.玩具在每一个幼小的心灵里镌刻着岁月抹不去的痕迹.然而,玩具这个快乐使者,在把玩者享受其乐趣的同时,有谁来真真切切地关注过它的质量安全呢?     

儿童玩具召回管理规定

第一章 总则 第一条为了规范儿童玩具召回活动,预防和消除儿童玩具缺陷可能导致的损害,保障儿童健康和安全,根据《中华人民共和国产品质量法》、《国务院关于加强食品等产品安全监督管理的特别规定》等法律法规,制定本规定.第二条在中华人民共和国境内生产、销售的儿童玩具的召回及其监督管理,适用本规定.     

儿童玩具质量不容忽视

玩具虽是小产品,但却涉及塑料、木材、电子学、美学、儿童心理学等诸多学科,并直接影响儿童的安全和健康。因此,要生产出真正安全的、高质量的玩具产品也并非易事。     

儿童玩具召回产品追溯研究

有效实施儿童玩具召回活动,对于预防和消除儿童玩具缺陷可能导致的损害,保障儿童身体健康和生命安全具有重要的作用。本文从追踪和溯源的角度分析研究了儿童玩具召回过程的现状和问题,提出了儿童玩具召回产品追溯指南国家标准草案。     

E-optimal minimally connected block designs under mixed effects model

Summary Considering a mixed effects model in a minimally connected block design set-up, we obtain designs which areE-optimal, uniformly in the ratio of the variance components, for inference on varietal contrasts which constitute the fixed effects in the model. Work supported by the Centre for Management and Development Studies, Indian Institute of Management Calcutta. Work supported by the National Sciences and Engineering Research Council of Canada under grant number 7272 and partially done while visiting Indian Statistical Institute, Calcutta, India.     

A note on the robustness of Box-Behnken designs to the unavailability of data

Box-Behnken designs and central composite designs are efficient designs for fitting second order polynomials to response surfaces, because they use relatively small numbers of observations to estimate the parameters. In this paper we investigate the robustness of Box-Behnken designs to the unavailability of observations, in the sense of finding t _max , the maximum number of arbitrary rows in the design matrix that can be removed and still leave all of the parameters of interest estimable. The results are compared to the known results for the central composite designs found in MacEachern, Notz, Whittinghill & Zhu (1995). The blocked Box-Behnken designs are equally as robust as those that are not blocked. Received December 1997     

Optimal extended complete block designs for dependent observations

Optimal designs under general dependence structures are usually difficult to specify theoretically or find algorithmically. However, they can sometimes be found for a specific dependence structure and a particular parameter value. In this paper, a class of generalized binary block designs with t treatments and b blocks of size k>t is considered. Each block consists of h consecutive complete blocks and, at the end, an incomplete block of size k−ht (if k > ht). For a suitable number of blocks, a universally optimal design is found for a first-order stationary autoregressive process with positive correlations. Optimal generalized binary designs and balanced block designs are also considered. Some constructions for a universally optimal design are described. A negative dependence parameter, and some other dependence structures, are also considered.     

Optimality and efficiency of circular neighbor balanced designs for correlated observations

The purpose of this paper is to apply the Kunert and Martins (2000b) method for finding optimal designs into the case of dependence. Using this method we study optimality of circular neighbor balanced designs at distances 1 and 2 under the one-dimensional interference model with errors correlated according to a circular autoregressive process. We determine the efficiency of binary designs for specified values of correlation coefficient, for which these designs are not optimal.Research partially supported by the KBN Grant Number 5 P03A 041 21.     

Robust row-column designs for complete diallel cross experiments

This paper investigates the robustness of variance-balanced row-column designs for complete diallel cross experiments for estimating the comparisons among the general combining ability parameters against the loss of observations. A necessary and sufficient condition of robustness as per connectedness criterion is obtained. The robustness of optimal row-column designs of Gupta and Choi (1998) has been investigated for the loss of any m(≥1) observations in a column and for the loss of any two observations in the design. The study of robustness has also been conducted as per A-efficiency criterion.     

Optimal designs for generalized linear models with biased response

This paper is concerned with the search for locally optimal designs when the observations of the response variable arise from a weighted distribution in the exponential family. Locally optimal designs are derived for regression models in which the response follows a weighted version of Normal, Gamma, Inverse Gaussian, Poisson or Binomial distributions. Some conditions are given under which the optimal designs for the weighted and original (non-weighted) distributions are the same. An efficiency study is performed to find out the behavior of the D-optimal designs for the original distribution when they are used to estimate models with weighted distributions.     

涤纶棉制取树脂及在锤纹漆中的应用研究

涤纶工业中的废弃涤纶棉因其分子量大不易降解、处理困难而引起环境污染。根据废弃涤纶棉的成分特点可将其制成树脂并应用于锤纹漆中,应用性能指标较好。文章介绍了此类树脂的配方和合成工艺。该项工艺既可降低生产成本创造经济效益,又可减少环境污染产生环境效益。     

Optimal designs for models with block-block resp. treatment-treatment correlations

Summary In this paper we study optimal designs assuming two special covariance structures of the observations, namely that the covariance between the observations depends only on the blocks resp. the treatments. We show that the weighted least squares estimator equals the ordinary least squares estimator. Then we prove that block-block correlations resp. treatment-treatment correlations do not have any influence on the A- and MV-optimality resp. A-optimality. For the study of the MV-optimality in the case of treatment-treatment correlations we use the idea of invariance to find optimal C-matrices.     

浅析无线局域网安全

科技的发展使得无线网络以其独特的优越性逐渐成为发展的主流,然而随着无线网络的发展,安全性问题成为发展无线网络的瓶颈。为了保证无线局域网能够安全、正常的运行,通过对危害无线局域网的一些因素的分析,给出了相应的防护措施。     

浅谈公路施工企业安全生产规范管理

文章从多方面对公路施工企业安全生产规范管理问题进行了探究,并就如何解决这些问题提出笔者的观点,以供参考。