较为全面地回顾了我国黄河下游治理方略的演变,着重介绍了黄河下游治理的最新科研成果——流域"分区治理"新方略.新方略将黄河河道至大堤之间的流域空间依次划分为生态移民安置区、高效生态农业区和生态湿地等功能区,利用泥沙放淤、挖河疏浚等技术手段实施滩区再造,建设嫩滩、二滩和高滩,以达成洪水分级设防、泥沙分区落淤、滩槽水沙自由交换的水沙调控目标.采用新方略及相应的前沿技术治理黄河下游,有望实现治河与惠民双赢,促进沿黄经济带高质量发展及其水生态文明建设.

The inverse relationship between water and sediment is hindering the regulation of sediment in silt-laden rivers. Under natural conditions and insufficient water flow, sediment deposits along river channels, resulting in the accumulation of suspended river sediments above the ground level on both sides of the river. Then, during flooding, dam collapse and overflow can easily occur, threatening the life of residents in floodplain. The operation of upstream reservoirs to maximise the sediment transport capacity of downstream rivers into the sea is deemed the best strategy for the management of silt-laden rivers. However, as incoming water and sediment form a dynamic system, optimising the operation mode of reservoirs has become the most severe challenge in the field. This study proposes a method to remodel the water-sediment relationship of natural rivers by optimising the reservoir operation. First, data were collected and analysed to investigate sediment transport in the downstream river channel and the response relationship between erosion-deposition. Then, an empirical equation for calculating the desired incoming sediment was derived, and the threshold for sedimentary transport balance in the lower reach of silt-laden rivers was determined through mathematical modelling. Finally, the reservoir operation mode was optimised within the threshold range to study the discharge process of the reservoir with the highest sediment transport efficiency downstream. The Yellow River in China exhibits the highest sediment concentration worldwide and was used as a case study to verify the practicability of the proposed method. The critical threshold for sediment transport balance in the lower Yellow River was determined to be 250 million tons. The results demonstrate that the proposed method improved the sediment transport capacity of the lower reaches of the Yellow River. Moreover, it reduced the siltation of the XiaoLangDi Reservoir and the lower reaches of the Yellow River. The XiaoLangDi Reservoir can be jointly operated with the Guxian Reservoir, which is under construction and is expected to maintain the bankfull discharge of the lower reaches of the Yellow River at 4000 m(3) for a long time. The optimisation process described in this study can be used to improve the management of silt-laden rivers.

初入职场大学生作为新生代知识型员工和职场新人,可能更敢于表达自身不满,也可能倾向通过自省抑制不满表达.根据案例分析结果和访谈实际情况发现,初入职场大学生对职业成长的渴望十分强烈,但职业规划并不明晰;在职场中感知不满倾向于自我调节、压抑不满表达,通常采取非言语抱怨行为;常产生离职倾向,但离职行为的实施往往受到多方面因素影响.对此提出对策建议,为企业人力资源管理实践提供启发.

水泥土搅拌桩和预应力管桩均为常用的软基处理方法,在水闸工程中有时只用水泥土搅拌桩时承载力达不到设计要求,选用预应力管桩时,基础土体与闸底板易分离.本文结合沙多玛泵闸的工程实例,阐述水泥土搅拌桩和预应力管桩联合使用形成复合桩基础的相关设计内容.

格尔木河为内陆河，属我国西北诸河流域的达不逊湖水系，出山口后流经格尔木市，洪水特点是峰高量大，主流摆动，河床为深厚的砂砾石层，洪水对两侧堤岸淘刷严重。格尔木河市区段虽经多次治理，但都以失败告终，本次设计中采用柔性备塌体护根结构，对中小流域治理中类似工程具有借鉴价值。备塌体属柔性结构，适应地基变形能力强，在侧向冲刷严重的河流治理上使用可有效解决冲刷问题、沉降问题，生态及环境问题，同时施工方便，节约投资，在中小流域治理中具有较好的借鉴意义。

蕉东联围堤围加固工程位于番禺区东涌镇,晒增涌水闸～安顺水闸堤段原有堤防经历代多次加固而成,堤身和堤基土质复杂,在历代培厚、加高过程中,由于施工方法和土质不一,存在空洞、裂隙的隐患。为控制渗漏消除隐患节约投资,采用锥探灌浆法进行处理。

地产商业是现代商业的一个组成部分。而目前我国商业建筑策划却存在诸多经营、规划方面的问题,直接影响到了后期经营效果和商业形象,进而对整个项目运营的成败产生了不利的影响。本文从目前国内商业项目建筑策划角度常见问题予以分析原因,提出部分解决办法,并作以归纳总结。

随着经济危机的影响和房地产市场竞争的日趋激烈,顾客对房地产价值感知凸显,通过对房地产顾客感知价值方法的研究,能够使房地产企业更加深刻的理解顾客的需求。

通过对我国及西安市二手房市场现状的分析,发现中介企业二手房交易过程中存在的风险。对中介企业二手房交易的风险因素进行分析评价并制定相应的对策。

研究发现,企业只有真正站在顾客的角度上来看待产品和服务的价值才能活得长久不衰的竞争优势。这种价值是由顾客感知的,而不是企业决定的,这就是顾客感知价值。基于顾客感知价值对房地产行业的重要性,本论文针对房地产顾客感知价值测评,即从顾客的角度,探求顾客房地产价值构成指标,构建评价体系。