光纤技术入门指南：探索光导纤维的奥秘

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《光纤技术现场指南》是一本深入浅出的光纤英文教材，由Rüdiger Paschotta撰写，收录于SPIE Field Guides系列的第16卷。本书旨在为读者提供全面的光纤技术概述，适合那些希望了解或在光纤领域工作的专业人士。作者以其丰富的专业知识，将复杂的光纤理论和实践应用讲解得通俗易懂。 该书内容覆盖了光纤通信的核心原理，包括光纤的基本结构、材料特性、光的传输特性以及光纤系统的组成与设计。读者可以从中了解到光纤的分类（如单模光纤、多模光纤等）、光纤的工作原理（如全反射、模式色散等）、光纤的连接技术（如熔接、连接器等）以及光纤在网络通信、数据传输、光学信号处理中的关键作用。 书中不仅包含基础理论，还涉及到了实际工程中的应用场景和案例，帮助读者掌握如何解决光纤网络中常见的问题，以及如何评估和选择合适的光纤解决方案。此外，为了方便查阅，书籍还附有详细的参考文献和索引，便于读者进一步深入研究相关主题。 版权方面，本书受到Society of Photo-Optical Instrumentation Engineers的保护，未经出版商书面许可，任何形式的复制或分发都是非法的。尽管书中提供了准确的信息，但出版社不对信息的准确性负责，也不对由此产生的任何结果承担责任。作者和出版者都致力于确保内容的可靠性，但读者在应用所学知识时需自行判断其适用性。 《光纤技术现场指南》是一本实用性强、信息全面的参考书籍，对于想要在光纤技术领域提升技能或从事相关工作的人员来说，无论是作为入门读物还是专业参考，都是不可或缺的资源。通过阅读和学习，读者将能更好地理解和掌握光纤技术，推动信息技术的进一步发展。

The Field Guide to Data Science

2016-02-24 上传
The Field Guide to Data Science

Effective Computation in Physics Field Guide to Research with Python mobi

2017-10-03 上传
Effective Computation in Physics Field Guide to Research with Python 英文mobi 本资源转载自网络，如有侵权，请联系上传者或csdn删除 本资源转载自网络，如有侵权，请联系上传者或csdn删除

RF photonic technology in optical fiber links.pdf

2014-06-29 上传
Optical fiber provides a transmission medium in which RF modulated optical carriers can be transmitted and distributed with very low loss, making it more efficient and less costly than conventional ...

Import arcpy module import arcpy # Get input feature class and output feature class input_fc = arcpy.GetParameterAsText(0) output_fc = arcpy.GetParameterAsText(1) # Get field list of input feature class fields = arcpy.ListFields(input_fc) # Create a list of field names to keep field_names = ["OID@", "SHAPE@", "SHAPE_LENGTH", "SHAPE_AREA"] # Loop through input feature class fields and add field names to field_names list for field in fields: if not (field.name in field_names): # If the field name is not in the field_names list field_names.append(field.name) # Add the field name to the field_names list # Use Make Feature Layer to create a layer from the input feature class arcpy.MakeFeatureLayer_management(input_fc, "temp_layer") # Use Add Field Delimiters to get the correct syntax for field names delimited_fields = arcpy.AddFieldDelimiters("temp_layer", field_names[0]) for i in range(1, len(field_names)): delimited_fields += "," + arcpy.AddFieldDelimiters("temp_layer", field_names[i]) # Use Copy Features to create the output feature class with only the specified fields arcpy.CopyFeatures_management("temp_layer", output_fc, delimited_fields) # Delete the temporary layer arcpy.Delete_management("temp_layer")运行错误：Traceback (most recent call last): File "D:\多对一空间连接\删除所有字段.py", line 28, in <module> File "c:\program files (x86)\arcgis\desktop10.2\arcpy\arcpy\management.py", line 2429, in CopyFeatures raise e ExecuteError: 执行失败。参数无效。 ERROR 000800: 该值不是 | DEFAULTS | TEXT_UTF16 | MAX_FILE_SIZE_4GB | MAX_FILE_SIZE_256TB | GEOMETRY_OUTOFLINE | BLOB_OUTOFLINE | GEOMETRY_AND_BLOB_OUTOFLINE | TERRAIN_DEFAULTS | MOSAICDATASET_DEFAULTS | MOSAICDATASET_INLINE 的成员。 执行(CopyFeatures)失败。 执行(删除所有字段)失败。请改正代码

2023-05-25 上传
field_names.append(field.name) # Add the field name to the field_names list # Use Make Feature Layer to create a layer from the input feature class arcpy.MakeFeatureLayer_management(input_fc, "temp_...

help me Write a complete guide to writing Scientific Papers

2023-04-12 上传
1. Choose your topic: Your topic should be something that you're passionate about and that relates to your field of study. Make sure it's a specific enough topic that you'll be able to cover it ...

WARNINGS: ?: (staticfiles.W004) The directory 'static' in the STATICFILES_DIRS setting does not exist. buy.Cart: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'. HINT: Configure the DEFAULT_AUTO_FIELD setting or the BuyConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.d b.models.BigAutoField'. buy.Orders: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'. HINT: Configure the DEFAULT_AUTO_FIELD setting or the BuyConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.d b.models.BigAutoField'. sale.Brand: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'. HINT: Configure the DEFAULT_AUTO_FIELD setting or the SaleConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django. db.models.BigAutoField'. sale.Carinfo: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'. HINT: Configure the DEFAULT_AUTO_FIELD setting or the SaleConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django. db.models.BigAutoField'. userinfo.UserInfo: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'. HINT: Configure the DEFAULT_AUTO_FIELD setting or the UserinfoConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'dja ngo.db.models.BigAutoField'. No changes detected

2023-06-02 上传
To address the `models.W042` warnings, you can either add a `primary_key=True` argument to an existing field or create a new field with the `primary_key=True` argument. For example: ```python class ...

What is the result after executing the above code? data: field1 type I value 10. End-of-selection. Subtract 2 from field1. Write: / 'field1 =', field1. Start-of-selection. Add 5 to field1. Write: / 'field1 =', field1. Initialization. Field1 = 5. Write: / 'field1 =', field1.

2023-06-10 上传
In the `Start-of-selection` event, 5 is added to `field1` and the resulting value of 15 is not output to the screen. In the `End-of-selection` event, 2 is subtracted from `field1` which results in a ...

Write a complete guide to writing Scientific Papers

2023-04-12 上传
2. Gather and review the relevant literature in your field. 3. Develop a clear and concise research question or hypothesis. 4. Design and conduct your experiment or research study. 5. Analyze your ...

django to_field

2023-05-29 上传
在 Django 中，`to_field` 是指用于设置 ForeignKey 或 OneToOneField 关联对象的字段。默认情况下，这些关联字段会使用关联对象的主键作为关联值，但是你可以通过指定 `to_field` 属性，来让其使用关联对象的其他...

Setting data field "cyrname" to undefined is invalid.

2023-07-14 上传
The error message you mentioned, "Setting data field 'cyrname' to undefined is invalid," suggests that you are attempting to set the value of the data field 'cyrname' to 'undefined', which is not a ...
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