In recent years，With the rapid advancement of urbanization，Urban risks are becoming more frequent、Additive、Complex characteristics such as conductivity，Some uncertain factors and unknown risks are increasing。Natural app bet365 download、Major public health emergency、Public conflict、Environmental pollution, etc.，Often affects the development of cities，Deserves high vigilance。Resilient cities refer to the ability to withstand disasters or reduce app bet365 download losses based on their own capabilities，Cities that rationally allocate resources to quickly recover from disasters。In response to the various risks mentioned above，We must actively promote the construction of resilient cities。

　　app bet365 download characteristics and conditions of use

Resilient cities have five characteristics。First, robustness，That is, cities can withstand disasters，Reducing the economy caused by disasters、Society、Personnel、Loss of materials and other aspects。The second is recoverability (Rapidity)，That is, the city has the ability to recover quickly after disasters，Be able to restore to a certain functional level in a short period of time after a app bet365 download。The third is redundancy，That is, key functional facilities in the city should have certain spare modules，When a app bet365 download occurs suddenly and damages the functions of some facilities，Spare modules can be replenished in time，Enable the entire system to still function at a certain level，Without being completely paralyzed。The fourth is resourcefulness，That is, the city has basic app bet365 download relief resource reserves and the ability to reasonably allocate resources，Ability to optimize decisions under limited resources，Maximize resource efficiency。The fifth is Adaptability，That is, cities can learn from past disasters，Improving app bet365 download response capabilities。

These characteristics are closely related to the technical foundation of resilient cities。Robustness reflects the ability of urban app bet365 download to withstand disasters，The stronger it is、Buildings with greater space capacity，The more resistant you are to disasters。Recoverability reflects urban technical reconstruction capabilities，& Material Accessibility、Technical regularity, etc.。Redundancy reflects the adaptability of disaster-resistant technologies and the substitutability of technical functions，When a disaster occurs，Redundant app bet365 download must be able to play a substitute function，Different redundancy app bet365 download configurations can play different roles。Smartness reflects the city’s ability to allocate technical resources。Adaptability reflects app bet365 download improvement capabilities。No matter what ability it is，Often presented in a standby state，Reflecting the overall redundancy of app bet365 download in resilient city construction。As a backup module，These technologies are usually in a dormant state。When disaster strikes，The backup module can be started immediately，Maintain the normal operation of the city，Reducing disaster hazard。

Cities are the result of the coordinated operation of many technologies，Some are running alternately，Some of them stimulate each other，Some are on standby。Integrating redundant technologies into resilient cities、Differentiated by mutual excitation app bet365 download。Redundant app bet365 download is usually asleep，Start using only when disaster occurs。Alternate、Mutual excitation app bet365 download is a app bet365 download used under normal conditions in the city。The city is operating normally，Some app bet365 download is running，Some technologies are at rest，They run alternately；Some technologies are inspired by other technologies，Complete specific functions。Cities are like people，Surrounded by app bet365 download，Some are in operation，Some are serving operations。Heidegger proposed human existence or Dasein，Essentially, it is a kind of "being-in-the-world"。The same goes for cities，Redundancy app bet365 download is not a simple tool，Rather, it is always in interaction with other technologies，Form a "being-in-the-world" state with other technologies。Urban redundant app bet365 download although usually dormant，But it interacts with the normal functioning app bet365 download of the city，Together constitute the city’s operating status。

Redundant app bet365 download can be used normally when disaster occurs，Three conditions must be met。First, it can start normally。Start normally when a disaster occurs，Different from usual startup，It needs to be simple to operate，It must be relatively universal，If you are too professional, you will not meet this requirement。The second is when redundancy app bet365 download is activated，To minimize interference to the normal operation of the city。Interference level and disaster level equipment，Big disasters lead to big disturbances，The disaster is small and the disturbance is small。Otherwise，It may affect the normal operation of the city，Increasing the additional costs caused by disasters。Third, redundant technical equipment must minimize damage to the normal operation of the city。Equipped with redundant app bet365 download，Inevitably increase costs，Interfering with the original normal operation，But it is necessary to ensure the normal startup of redundant app bet365 download，We must also ensure the appropriateness of urban technical configuration。On the premise of effectively improving urban resilience，To save costs as much as possible，In order to facilitate the good operation of the city。

　　Overall app bet365 download and departmental app bet365 download

There are usually two perspectives on redundant app bet365 download design for resilient cities: the overall perspective and the departmental perspective。Start from the overall perspective from the overall framework，The city as a whole，Its operation has overall rules。From a holistic perspective，Special entities and their interactions can be seen。Facing sudden disasters，Where did the city collapse first，Where to spread，How the intermediate process happens。As a whole，The configuration of redundant app bet365 download is always integrated with planning。In case of disaster，app bet365 download cannot be activated effectively，Or professional startup is required，It may not be a good app bet365 download that meets planning requirements。An important consideration of redundancy app bet365 download from a holistic perspective is effective startup when a disaster strikes。In addition，Redundant app bet365 download from a holistic perspective will also consider reducing interference to the normal operation of the city，Get maximum benefits at minimum cost when enabled，But they often don’t take care of this well。Whether it is to change the plan，Or equip redundant app bet365 download from a planning perspective，The overall perspective often seriously interferes with the original equipment and work requirements of various city departments。To meet the overall requirements，City departments may have to adjust existing equipment、Job requirements must be met。The overall perspective often fails to comply with the cost-saving principle of redundant app bet365 download configuration。

From a departmental perspective, each city department sets up redundant technologies according to disaster prevention needs。Each department has its own planning requirements and work content，Such as transportation department、Public Place Management Department、Power supply and water supply department, etc.。The department’s perspective will be based on its own planning requirements、Equipped with redundant app bet365 download based on work rhythm。Redundancy app bet365 download for disaster prevention and preparedness，It has special rules and requirements，When departments are equipped with redundant app bet365 download，Will be integrated into existing equipment and work，Coordinate with existing equipment and work。By equipped with redundant app bet365 download，The original department methods and functions will not change，Can save the cost of redundant technical equipment department，No need to change the original environment and work and life rhythm。But，There is a problem that the redundant app bet365 download equipped does not have universal operation。A redundant technical configuration that meets the special requirements of the department，In case of emergency，Requires professional skills to operate，Does not meet the simple operation requirements in complex situations when disaster strikes。When the disaster impact is within the scope of department response，app bet365 download enablement will disrupt city operations as little as possible；Once the disaster impact exceeds the department’s response scope，The effective implementation of app bet365 download will greatly interfere with the normal operation of the city，Because redundant app bet365 download only follows the principle of gradual activation within the scope of department knowledge，If beyond this range，There may be a disordered state enabled by app bet365 download。

Therefore，Whether it is an overall perspective or a departmental perspective，While having advantages，All have certain flaws，This is closely related to technical characteristics。On the one hand，app bet365 download provides certain means for certain purposes；On the other hand，There is a causal connection behind app bet365 download。The former means the purpose comes first，Regarded as final cause；The latter reason comes first，Results in certain results。This is also seen as the duality of technical structure and function。

　app bet365 download causality and means-purpose

From different perspectives，Means of app bet365 download expression、Purpose characteristics and causal characteristics are different。First，There is a contradiction between app bet365 download causality and means purpose。Emphasis on cause and effect, the original means and purposes need to be changed，Vice versa，You must ignore cause and effect。Secondly，The combination of app bet365 download causality and means-purpose from a holistic perspective，Doesn’t adapt to department requirements anyway，The combination of app bet365 download causality and means-purpose from a departmental perspective does not meet the overall requirements。The construction of resilient cities cannot ignore the overall requirements，Cannot ignore departmental requirements。Find the middle way，Is the app bet365 download foundation that must be considered first in the construction of resilient cities。

Technical causality embodies universal fact requirements，The means and purpose reflect the requirements of historical value。The construction of resilient cities can start from the community，Combining one’s own means and ends，Propose redundant app bet365 download construction requirements to each department，Require all departments to appropriately adjust means and purposes to comply with redundant app bet365 download construction requirements；Push upward to recombine means and ends，Adapt to overall causal integration requirements of redundant technologies。Specifically，Urban redundant technical equipment puts forward causal requirements from the community，Departments should try their best to approach this requirement based on their actual conditions。Redundant app bet365 download to various industries、Region Extension，Requires the overall management of the city to restructure its original purposes and means，Adapt to redundant technical configuration requirements。

First，Departments do not simply deploy redundant app bet365 download，Instead, redundant app bet365 download is integrated into departmental means and purpose requirements through technological innovation，At the same time, let the original means and purposes be appropriately adjusted to adapt to the causal requirements of redundant app bet365 download。The department has strong ties with the community，No major changes to the original means and purpose，Maintained the original rhythm of work and life，Saved the cost of equipping departments with redundant app bet365 download。Secondly，Continue to introduce redundant technical configuration requirements to the industry、Region Extension，Expand the adaptability of redundant app bet365 download。This not only expands the universality of operations when disasters strike，It also improves the technical adaptability to disaster response。Finally，The original means and purposes of urban management need to be adjusted，Adapt to the overall management requirements of redundant app bet365 download。Cities should pay more attention to internal technical coordination，To better build resilient cities。

　(Author’s unit: Institute of Spiritual Civilization, Guangdong Academy of Social Sciences)