工程复工疫情防控及安全管控十项措施

为确保国网湖北省电力有限公司工程项目安全有序复工,确保人员生命安全和身体健康,该公司制定了《工程复工疫情防控及安全管控十项措施》,从责任落实、组织安排、物资保障、宣传教育培训等10个方面提出了具体的疫情防控和安全管控措施.

现行工程质量评定标准在复工高速公路上适用性分析与建议

对已建工程质量进行评定，是复工公路项目的关键。不仅关系着复工后处治措施的采用．同时也关系项目的整体交工验收的最终评定。然而，对此项工作的研究目前国内尚处于空白阶段。文章基于桥梁技术状况评定的对比分析，考虑到复工项目已建桥梁工程区别于新建工程的复杂特性，对其质量评定给出思路与建议。

“新冠肺炎”疫情期间复工工程项目安全生产管理探究

随着“新冠肺炎”疫情防控取得阶段性成效,全国各地工程项目也开始逐步复工复产。正是在这特殊时期,一些工程项目为了“抢回”因疫情影响的工程进度,容易轻视安全生产工作,仅在2020年3月份,全国已发生多起工程项目生产安全事故,给建筑行业安全生产再次敲响警钟。本文通过分析“新冠肺炎”疫情期间安全生产管理的特点,探究如何统筹做好疫情防控和安全生产,安全高效地推进项目建设。

住房和城乡建设部印发《房屋市政工程复工复产指南》

本刊讯住房和城乡建设部近日印发《房屋市政工程复工复产指南》(以下简称《指南》),从复工复产条件、现场疫情防控、质量安全管理、应急管理、监督管理、保障措施等方面做出工作部署和要求。《指南》明确,构建疫情防控机制。

超长年假和新冠肺炎疫情下总监对工程暂停与复工问题的处理探析

在2020年的超长年假和新冠肺炎疫情双重因素作用下,工程监理单位需应时创新,全面做好监理工作.项目监理机构特别是总监应处理好疫情防控时期的工程暂停与复工的矛盾,采取合同救治措施处理好施工单位已经提出或者可能提出的工期延长、费用增加等合同管理问题,同时总结好不可抗力情形下的监理工作经验.

Carbon sequestration of plantation in Beijing-Tianjin sand source areas

The Beijing-Tianjin Sand Source Control Project(BTSSCP), a national ecological restoration project, was launched to construct an ecological protection system in the Beijing-Tianjin sand source areas to reduce dust hazards. The carbon sequestration dynamics can be used to assess the ecological effects of an ecological restoration project. Here, we conducted vegetation and soil study to assess the carbon sequestration in the plantations with 10 years old stands in Beijing-Tianjin sand source areas. The results at the site scales indicated that the average net increase of plantation ecosystem carbon stock was 33.8 Mg C ha^(-1), with an annual increase rate of 3.38 Mg C ha^(-1) yr^(-1). The average net increase of carbon varied among regions, vegetation types, and forest management activities. Soil bulk density in the top soil decreased slightly after 10-year implementation of the project. Coniferous forests and shrubs are suitable plant species for sand source areas.Natural restoration in the plantations is a practical and feasible and promising approach for enhancing ecosystem carbon sequestration potential.

Multi Boost with ENN-based ensemble fault diagnosis method and its application in complicated chemical process

Fault diagnosis plays an important role in complicated industrial process.It is a challenging task to detect,identify and locate faults quickly and accurately for large-scale process system.To solve the problem,a novel Multi Boost-based integrated ENN(extension neural network) fault diagnosis method is proposed.Fault data of complicated chemical process have some difficult-to-handle characteristics,such as high-dimension,non-linear and non-Gaussian distribution,so we use margin discriminant projection(MDP) algorithm to reduce dimensions and extract main features.Then,the affinity propagation(AP) clustering method is used to select core data and boundary data as training samples to reduce memory consumption and shorten learning time.Afterwards,an integrated ENN classifier based on Multi Boost strategy is constructed to identify fault types.The artificial data sets are tested to verify the effectiveness of the proposed method and make a detailed sensitivity analysis for the key parameters.Finally,a real industrial system—Tennessee Eastman(TE) process is employed to evaluate the performance of the proposed method.And the results show that the proposed method is efficient and capable to diagnose various types of faults in complicated chemical process.

Insurance ratemaking method for risk of construction diversion project

Based on analyzing risk factors of diversion project,synthetic risk rate and engineering insurance period,the frequency and distribution law of loss are researched on the grounds that foundation pit is submerged after diversion project ceases to be effective.And then,the standpoint that these total loss is subject to non-homogeneous compound Poisson processes is put forward.Furthermore,the collective risk model of the total loss about engineering insurance is established on the basis of construction diversion project risk.Ultimately,insurance ratemaking method for construction engineering risk and its mathematical expression are presented,which provides theoretical method for the insurance ratemaking of hydropower engineering to some extent.

Dynamical Measurement Method of Handle Reaction Vector for FES-Assisted Paraplegic Walking

To analyze the use of upper limb support during paraplegic walking assisted by functional electrical stimulation ( FES), a new dynamical measurement for handle reaction vector (HRV) ap- plied by patient to walker was proposed. To avoid the discomfort of direct monitoring, the dyna- mometer system was designed based on 12 string-gauge bridges instrumented on a standard walker frame. The detailed positions of these bridges were determined according to the deformation distri- butions of the walker frame under different directional components of HRV. To adapt the system to quantitative and reliable measurement, a redundant-optimized technique was developed in calibra- tion. The measurement accuracy, nonlinearity. and crosstalk of the designed system were investi- gated, which were better than 1.01%. 2.91%, and 3.19% respectively. Clinical trials were done with 6 paraplegic subjects using the system and one case was given as the example of actual mea- surement. All experiment and clinical trial results show that this method is reliable and practicable.

Researches on regenerative medicine current state and prospect

Since 1980s, the rapid development of tissue engineering and stem cell research has pushed regenerative medicine to a new fastigium, and regenerative medicine has become a noticeable research field in the international biology and medicine. In China, about 100 million patients need repair and regeneration treatment every year, while the number is much larger in the world. Regenerative medicine could provide effective salvation for these patients. Both Chinese Academy of Sciences and Chinese Academy of Engineering have made roadmaps of 2010-2050 and 2011-2030 for regenerative medicine. The final goal of the two roadmaps is to make China go up to leading position in most research aspects of regenerative medicine. In accord with this strategy, the government and some enterprises have invested 3-5 billion RMB （0.5-0.8 billion USD）for the research on regenerative medicine. In order to push the translation of regenerative medicine forward -- from bench to bedside, a strategic alliance has been established, and it includes 27 top-level research institutes, medical institutes, colleges, universities and enterprises in the field of stem cell and regeneration medicine. Recently the journal, Science, has published a special issue-Regenerative Medicine in China, consisting of 35 papers dealing with stem cell and regeneration, tissue engineering and regeneration, trauma and regeneration and bases for tissue repair and regenerative medicine. It is predicated that a greater breakthrough in theory and practice of regenerative medicine will be achieved in the near future （20 to 30 years）.