会议论文未被推荐至SCI期刊怎么办？合法合规扩充改投其他期刊完整指南

新增比例 = (期刊版总页数 - 与会议版重叠的页数) / 期刊版总页数

示例：期刊版16页，其中10页含有新内容或显著修改
新增比例 ≈ 10/16 = 62.5%（合规）

1. Introduction — 30%修改（新增动机和贡献描述）
2. Related Work — 60%新增（新增近两年文献）
3. Method A（原有） — 20%修改（更详细描述）
4. Method B（全新模块） — 100%新增
5. Experiments（原有实验） — 30%修改
6. Experiments（新增实验） — 100%新增
7. Theoretical Analysis（全新） — 100%新增
8. Discussion — 80%新增
9. Conclusion — 50%修改

Step 1：确认版权允许扩展发表
    |
Step 2：确定目标期刊并了解其扩展版政策
    |
Step 3：规划新增内容（确保达标）
    |
Step 4：撰写期刊扩展版
    |
Step 5：自查新增比例和相似度
    |
Step 6：撰写Cover Letter（声明关系）
    |
Step 7：投稿时如实填写声明
    |
Step 8：应对审稿人关于"与会议版关系"的质疑

Subject: Inquiry About Submitting Extended Conference Paper

Dear Editor-in-Chief / Dear Editorial Office,

I would like to inquire whether [Journal Name] accepts
submissions that are extended versions of previously published
conference papers.

I have a paper published at [Conference Name, Year] (DOI: [DOI])
that I would like to substantially extend for journal submission.
The extended version would include approximately [X]% new content,
including [brief description of new contributions].

Could you please confirm:
1. Whether such submissions are acceptable?
2. What percentage of new content is required?
3. Any specific requirements for declaring the relationship
   with the conference version?

Thank you for your guidance.

Best regards,
[Your Name]

Dear Editor,

We would like to submit the enclosed manuscript entitled
"[期刊论文标题]" for consideration for publication in
[Journal Name].

Declaration of Prior Publication:
An earlier and shorter version of this work was published as
a conference paper:

[Authors], "[Conference Paper Title]," in Proceedings of
[Conference Name], [City], [Year], pp. XX-XX.
DOI: [DOI]

Relationship to Conference Version:
The current manuscript is a substantially extended version
of the above conference paper. The major new contributions
beyond the conference version include:

1. [New contribution 1 - e.g., "A novel module X that improves
   performance by Y%"]
2. [New contribution 2 - e.g., "Comprehensive experiments on
   3 additional datasets"]
3. [New contribution 3 - e.g., "Theoretical convergence analysis
   (Section 4)"]
4. [New contribution 4 - e.g., "Extensive ablation studies and
   qualitative analysis"]

The new content accounts for approximately [X]% of the current
manuscript. We confirm that this submission complies with
[Journal Name]'s policy on extended conference papers.

We confirm that this manuscript has not been published elsewhere
and is not under consideration by another journal.

Best regards,
[Corresponding Author Name]

A preliminary version of this work was presented at [Conference
Name] [Year] [引用编号]. The current paper significantly extends
the conference version with the following new contributions:
(1) ...; (2) ...; (3) ....

This paper is an extended version of our conference paper [引用].
Compared to [引用], this manuscript additionally proposes [新方法],
conducts [新实验], and provides [新分析].

[XX] S. Zhang, W. Wang, and S. Li, "Conference paper title,"
     in Proc. IEEE Conf. XXXX (Conference Abbreviation),
     City, Country, Year, pp. XX-XX.

Fig. 1. Architecture overview of the proposed method.
(Originally published in [引用编号], reproduced with permission.)

Fig. 2. Experimental results on Dataset X.
(Extended from [引用编号] with additional baselines.)

We thank the reviewer for noting this. As stated in our cover
letter and in Section 1 (lines XX-XX), this manuscript is an
extended version of our conference paper [引用]. The current
submission contains approximately [X]% new content, including:

1. [New contribution 1] (Section X, entirely new)
2. [New contribution 2] (Section Y, entirely new)
3. [New contribution 3] (Tables/Figures X-Y, new experiments)

These extensions represent substantial new contributions beyond
the conference version, in compliance with [Journal]'s policy
on extended conference papers.

We appreciate this question. The key novelties beyond our
conference paper [引用] are:

1. Methodological: We propose [new module/algorithm] that...
2. Theoretical: We provide [new analysis/proof] that...
3. Empirical: We conduct [X additional experiments on Y new datasets]...
4. Analytical: We include [ablation study/case analysis] showing...

To quantify the extension: the conference paper is [N] pages;
the current manuscript is [M] pages with [X]% entirely new content.
A detailed comparison is provided in Appendix A / Table XX.

We respectfully clarify that this is NOT a duplicate publication.
It is a substantially extended journal version of our conference
paper, which is a standard and accepted practice in our field.

We have: (1) properly cited the conference version; (2) clearly
declared the relationship in our cover letter; (3) ensured [X]%
of the content is new; and (4) confirmed compliance with the
journal's extended paper policy.

Many influential works in our field follow this conference-to-journal
pipeline (e.g., [列举1-2个同领域的著名例子]).

Comparison between Conference Version and Journal Manuscript:

| Section | Conference Paper | Journal Manuscript | Status |
|---------|-----------------|-------------------|--------|
| Intro | 0.5 pages | 1.5 pages | Extended |
| Related Work | 0.5 pages | 2.5 pages | Significantly extended |
| Method A | 2 pages | 2.5 pages | Minor revision |
| Method B | N/A | 3 pages | Entirely NEW |
| Exp Set 1 | 1.5 pages | 2 pages | Extended |
| Exp Set 2 | N/A | 3 pages | Entirely NEW |
| Theory | N/A | 2 pages | Entirely NEW |
| Discussion | 0.3 pages | 1.5 pages | Significantly extended |
| Total | 6 pages | 18 pages | ~67% new content |