Updated civil design policies including standards for geotechnical and contaminated soil testing. Updated structural design requirements, policy for building risk category, and updated codes and references.

Illinois' primary central service agency delivering shared resources to state agencies, employees and local government. Central Management Services (CMS) is the operational engine working behind the scenes to enable the State's more than 80 agencies, boards, and commissions to deliver efficient, reliable services to all Illinois citizens.

Projects within the City of Chicago shall be designed in compliance with the current edition of the Chicago Building Code. Approval by CDB is required for designs which deviate from required codes. In design documents, when “approval by local authority” or “authority having jurisdiction” is referenced, substitute CDB for the local authority.

DCM (Discontinuous Conduction Mode)非连续导通模式：在开关周期内的某一时间段电感电流会变成0，意味着电感被适当地“复位”，即功率开关闭合时，电感电流为零。 如果觉得不错，欢迎关注我的微信公众号： 射频工程师的日常，每天给你分享技术干货！ 最简单直接的回答就是：BUCK电路CCM和DCM的临界条件是，负载电流等于纹波电流峰峰值的一半，即Iout=∆iL/2。 参考上图，降压电路工作在BCM模式的条件是，负载电流等于纹波电流（峰峰值）的一半（即 …

DCMA ensures the integrity of the contracting process and provides a range of contract-procurement management services.

Central Management Services (CMS) is the operational engine working behind the scenes to enable the State’s more than 80 agencies, boards, and commissions to deliver efficient, reliable services to all Illinois citizens.

2018年1月13日 · DCM (Discontinuous Conduction Mode)非连续导通模式：在开关周期内的某一时间段电感电流会变成0，意味着电感被适当地“复位”，即功率开关闭合时，电感电流为零。以非同步BUCK为例，分享MPS关于开关电源CCM与DCM的培训内容。收录于合集 #开关电源设计。...

DCM会导致conversion ratio M随着负载变化, 输出阻抗变大. 对于 buck converter 电感纹波 (1/2 Ipeak-peak) \Delta i_ {L}=\frac {V_ {g}-V} {2L}DT_ {s} \\ 随着R增大, I减小, 当I= \Delta iL 时系统进入DCM. I > \Delta iL for CCM. I < \Delta iL for DCM. 可以用K或者R进行DCM和CCM判断评价. K < Kcrit (D) for DCM, K > Kcrit (D) for CCM. K=2L/ (R*Ts).

All CDB manuals and forms are available on CDB’s Internet site (www.cdb.state.il.us). 1.3 Benchmarks. The A/E is required to provide or obtain surveys essential to the design and construction of the project as a basic service. A/E is responsible for obtaining its own benchmarks,

dcm 运行模式广泛用于 eco 模式降压转换器，这是一种可在轻负载运行中实现高效率的运行模式。 当电感器电 流降至 0A 时，高侧 FET 和低侧 FET 将关闭。